锂电池(chi)保护板原(yuan)理图 常见的一些不良反应(ying)分析及选择注意事项-KIA MOS管
信息来源(yuan)：本站 日期(qi)：2018-10-10
锂电(dian)(dian)(dian)(dian)池(chi)(chi)保护板(ban)是对串(chuan)联锂电(dian)(dian)(dian)(dian)池(chi)(chi)组(zu)的(de)充(chong)放电(dian)(dian)(dian)(dian)保护；在充(chong)满电(dian)(dian)(dian)(dian)时能保证(zheng)各(ge)单(dan)体电(dian)(dian)(dian)(dian)池(chi)(chi)之间(jian)的(de)电(dian)(dian)(dian)(dian)压(ya)差异小于设(she)定值（一般±20mV），实现电(dian)(dian)(dian)(dian)池(chi)(chi)组(zu)各(ge)单(dan)体电(dian)(dian)(dian)(dian)池(chi)(chi)的(de)均充(chong)，有效地改(gai)善了(le)串(chuan)联充(chong)电(dian)(dian)(dian)(dian)方式下的(de)充(chong)电(dian)(dian)(dian)(dian)效果(guo)；同(tong)时检(jian)测电(dian)(dian)(dian)(dian)池(chi)(chi)组(zu)中各(ge)个单(dan)体电(dian)(dian)(dian)(dian)池(chi)(chi)的(de)过(guo)压(ya)、欠压(ya)、过(guo)流、短路、过(guo)温(wen)状态，保护并延长(zhang)电(dian)(dian)(dian)(dian)池(chi)(chi)使用寿命；欠压(ya)保护使每一单(dan)节电(dian)(dian)(dian)(dian)池(chi)(chi)在放电(dian)(dian)(dian)(dian)使用时避免(mian)电(dian)(dian)(dian)(dian)池(chi)(chi)因过(guo)放电(dian)(dian)(dian)(dian)而(er)损坏。
一、锂电池保护板的构成
锂(li)电(dian)(dian)(dian)池(chi)(chi)(chi)保护(hu)(hu)(hu)(hu)板（可充型）之(zhi)所(suo)以需要保护(hu)(hu)(hu)(hu)，是由(you)它(ta)本身特性(xing)决(jue)定的(de)(de)(de)。由(you)于(yu)锂(li)电(dian)(dian)(dian)池(chi)(chi)(chi)本身的(de)(de)(de)材料(liao)决(jue)定了它(ta)不(bu)能(neng)被过(guo)充、过(guo)放、过(guo)流(liu)、短(duan)路(lu)(lu)(lu)及超高温(wen)充放电(dian)(dian)(dian)，因此锂(li)电(dian)(dian)(dian)池(chi)(chi)(chi)锂(li)电(dian)(dian)(dian)组(zu)件总会跟着一块精致的(de)(de)(de)保护(hu)(hu)(hu)(hu)板和一片电(dian)(dian)(dian)流(liu)保险器出现。锂(li)电(dian)(dian)(dian)池(chi)(chi)(chi)的(de)(de)(de)保护(hu)(hu)(hu)(hu)功能(neng)通常由(you)保护(hu)(hu)(hu)(hu)电(dian)(dian)(dian)路(lu)(lu)(lu)板和PTC协同完成，保护(hu)(hu)(hu)(hu)板是由(you)电(dian)(dian)(dian)子电(dian)(dian)(dian)路(lu)(lu)(lu)组(zu)成，在-40℃至+85℃的(de)(de)(de)环境下时(shi)刻准确的(de)(de)(de)监(jian)视电(dian)(dian)(dian)芯的(de)(de)(de)电(dian)(dian)(dian)压(ya)和充放回路(lu)(lu)(lu)的(de)(de)(de)电(dian)(dian)(dian)流(liu)，即时(shi)控(kong)制电(dian)(dian)(dian)流(liu)回路(lu)(lu)(lu)的(de)(de)(de)通断；PTC在高温(wen)环境下防止(zhi)电(dian)(dian)(dian)池(chi)(chi)(chi)发生恶劣的(de)(de)(de)损坏(huai)。
锂(li)电(dian)(dian)(dian)池保护板通常(chang)(chang)包括控(kong)制(zhi)(zhi)IC、MOS开关、电(dian)(dian)(dian)阻、电(dian)(dian)(dian)容及辅助(zhu)器(qi)件(jian)NTC、ID存储器(qi)等。其中控(kong)制(zhi)(zhi)IC，在(zai)一切正(zheng)常(chang)(chang)的(de)(de)情况下控(kong)制(zhi)(zhi)MOS开关导通，使电(dian)(dian)(dian)芯与外电(dian)(dian)(dian)路沟(gou)通，而当电(dian)(dian)(dian)芯电(dian)(dian)(dian)压或回(hui)路电(dian)(dian)(dian)流超过规定值(zhi)时，它立刻（数十毫秒）控(kong)制(zhi)(zhi)MOS开关关断，保护电(dian)(dian)(dian)芯的(de)(de)安全。NTC是Negative temperaturecoefficient的(de)(de)缩写，意即负温度系数，在(zai)环境温度升(sheng)高时，其阻值(zhi)降低，使用电(dian)(dian)(dian)设(she)备(bei)或充电(dian)(dian)(dian)设(she)备(bei)及时反应、控(kong)制(zhi)(zhi)内部(bu)中断而停止充放电(dian)(dian)(dian)。
二、锂电池保护板的主要作用
一(yi)般要求在(zai)-25℃～85℃时Control(IC)检测(ce)控(kong)制电芯(xin)电压与充(chong)放(fang)电回路(lu)(lu)的(de)工作(zuo)电流、电压，在(zai)一(yi)切正(zheng)常(chang)(chang)情(qing)况下C-MOS开关(guan)管导通，使(shi)电芯(xin)与锂电池(chi)保护(hu)电路(lu)(lu)板处(chu)于正(zheng)常(chang)(chang)工作(zuo)状(zhuang)态，而当电芯(xin)电压或回路(lu)(lu)中的(de)工作(zuo)电流超过控(kong)制IC中比较(jiao)电路(lu)(lu)预设值时，在(zai)15～30ms内（不同控(kong)制IC与C-MOS有不同的(de)响应时间），将CMOS关(guan)断，即关(guan)闭电芯(xin)放(fang)电或充(chong)电回路(lu)(lu)，以保证使(shi)用者(zhe)与电芯(xin)的(de)安全。
如图中，IC由电(dian)(dian)芯供电(dian)(dian)，电(dian)(dian)压(ya)在2v－5v均能保证可靠工作。
1、过充(chong)保护(hu)及过充(chong)保护(hu)恢复
当电(dian)(dian)(dian)池(chi)被充(chong)电(dian)(dian)(dian)使电(dian)(dian)(dian)压(ya)超过(guo)(guo)设定(ding)值(zhi)VC(4.25-4.35V，具(ju)(ju)体过(guo)(guo)充(chong)保(bao)护(hu)电(dian)(dian)(dian)压(ya)取决(jue)于IC)后，VD1翻(fan)转使Cout变(bian)为(wei)低电(dian)(dian)(dian)平(ping)(ping)，T1截止(zhi)，充(chong)电(dian)(dian)(dian)停止(zhi).当电(dian)(dian)(dian)池(chi)电(dian)(dian)(dian)压(ya)回落至VCR(3.8-4.1V，具(ju)(ju)体过(guo)(guo)充(chong)保(bao)护(hu)恢复电(dian)(dian)(dian)压(ya)取决(jue)于IC)时，Cout变(bian)为(wei)高电(dian)(dian)(dian)平(ping)(ping)，T1导通充(chong)电(dian)(dian)(dian)继续， VCR必须小(xiao)于VC一个定(ding)值(zhi)，以防止(zhi)频繁跳变(bian)。
2、过放(fang)保护(hu)及过放(fang)保护(hu)恢复
当电(dian)(dian)池电(dian)(dian)压因放(fang)(fang)电(dian)(dian)而降低至设(she)定值VD（2.3-2.5V，具(ju)体过充(chong)保(bao)护电(dian)(dian)压取决于IC）时(shi)， VD2翻(fan)转，以短时(shi)间延(yan)时(shi)后，使(shi)Dout变(bian)为低电(dian)(dian)平，T2截(jie)止，放(fang)(fang)电(dian)(dian)停止，当电(dian)(dian)池被置于充(chong)电(dian)(dian)时(shi)，内部(bu)或门被翻(fan)转而使(shi)T2再次(ci)导(dao)通为下次(ci)放(fang)(fang)电(dian)(dian)作(zuo)好准备(bei)。
3、过流、短路保护
当电路充放(fang)回(hui)路电流超过设定值(zhi)或被短路时，短路检测电路动(dong)作，使MOS管(guan)关断，电流截止。
R1：基准供电电阻(zu)；与IC内部(bu)电阻(zu)构(gou)成(cheng)分(fen)压电路(lu)，控制内部(bu)过(guo)充、过(guo)放电压比较(jiao)器的电平翻转；一(yi)般在(zai)阻(zu)值(zhi)(zhi)为330Ω、470Ω比较(jiao)多；当封装形式(shi)（即用(yong)(yong)标(biao)准元(yuan)件(jian)的长和宽(kuan)(kuan)来表(biao)示(shi)元(yuan)件(jian)大小，如(ru)0402封装标(biao)识此元(yuan)件(jian)的长和宽(kuan)(kuan)分(fen)别为1.0mm和0.5mm）较(jiao)大时，会用(yong)(yong)数(shu)字(zi)标(biao)识其(qi)(qi)阻(zu)值(zhi)(zhi)，如(ru)贴片电阻(zu)上数(shu)字(zi)标(biao)识473， 即表(biao)示(shi)其(qi)(qi)阻(zu)值(zhi)(zhi)为47000Ω即47KΩ（第三位(wei)数(shu)表(biao)示(shi)在(zai)前两位(wei)后面加0的位(wei)数(shu)）。
R2：过(guo)流、短(duan)路(lu)检(jian)测电(dian)(dian)阻(zu)；通过(guo)检(jian)测VM端电(dian)(dian)压控制保护(hu)板的电(dian)(dian)流 ，焊(han)接(jie)不良(liang)、损坏会造成电(dian)(dian)池过(guo)流 、短(duan)路(lu)无(wu)保护(hu)，一般阻(zu)值为1KΩ、2KΩ较(jiao)多。
R3：ID识(shi)别(bie)电阻(zu)或NTC电阻(zu)（前面有(you)介绍）或两者都有(you)。
总结：电阻在保(bao)护板(ban)中为黑色(se)贴片(pian)，用万用表(biao)可测其阻值(zhi)，当(dang)封装较大时其阻值(zhi)会用数字表(biao)示，表(biao)示方法(fa)如上所述，当(dang)然电阻阻值(zhi)一般都有偏(pian)差，每(mei)个电阻都有精度规格(ge)，如10KΩ电阻规格(ge)为+/－5％精度则其阻值(zhi)为9.5KΩ －10.5KΩ范(fan)围内都为合格(ge)。
C1、C2：由于电(dian)(dian)容两端电(dian)(dian)压不能(neng)突变，起瞬间(jian)稳(wen)压和滤波(bo)作用(yong)。总结：电(dian)(dian)容在保(bao)护板(ban)中为黄色贴片，封(feng)装(zhuang)形式(shi)0402较多，也有少(shao)数(shu)0603封(feng)装(zhuang)(1.6mm长,0.8mm宽)；用(yong)万用(yong)表检测(ce)其阻(zu)值一(yi)般为无穷大(da)或(huo)MΩ级别(bie)；电(dian)(dian)容漏电(dian)(dian)会(hui)产(chan)生自(zi)耗(hao)电(dian)(dian)大(da)，短(duan)路无自(zi)恢(hui)复现象。FUSE：普通FUSE或(huo)PTC（Positive Temperature Coefficient的缩(suo)写，意思是正温(wen)度系(xi)数(shu)）；防止不安全大(da)电(dian)(dian)流和高温(wen)放(fang)电(dian)(dian)的发生，其中PTC有自(zi)恢(hui)复功能(neng)。
总结：FUSE在保护板中一(yi)般为白(bai)色贴(tie)片，LITTE公司提(ti)供FUSE会在FUSE上(shang)标识字(zi)(zi)符D-T，字(zi)(zi)符表(biao)示(shi)意(yi)思为FUSE能(neng)承受的(de)额定电(dian)流，如(ru)表(biao)示(shi)D额定电(dian)流为0.25A，S为4A，T为5A等。
U1：控制IC；保(bao)护板所(suo)有功能都是IC通过监视连接在(zai)VDD-VSS间(jian)的(de)(de)电压(ya)差(cha)及VM-VSS间(jian)的(de)(de)电压(ya)差(cha)而控制C-MOS执(zhi)行开(kai)关(guan)动作(zuo)来实现的(de)(de)。
Cout：过充控(kong)制(zhi)端(duan)；通过MOS管T2栅极电压控(kong)制(zhi)MOS管的(de)开(kai)关。
Dout：过(guo)(guo)放、过(guo)(guo)流、短路控制端；通过(guo)(guo)MOS管T1栅(zha)极电压控制MOS管的开关。
VM：过(guo)流、短路保护电压(ya)检测端；通过(guo)检测VM端的电压(ya)实(shi)现电路的过(guo)流、短路保护（U（VM）=I*R（MOSFET））。
总结：IC在保(bao)护(hu)板中一般为(wei)6个管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)的封(feng)(feng)装(zhuang)形式，其(qi)区(qu)别(bie)(bie)管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)的方法为(wei)：在封(feng)(feng)装(zhuang)体(ti)上标识黑点(dian)的附近(jin)为(wei)第1管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)，然(ran)后逆时针旋转分别(bie)(bie)为(wei)第2、3、4、5、6管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)；如封(feng)(feng)装(zhuang)体(ti)上无(wu)(wu)黑点(dian)标识，则正看(kan)封(feng)(feng)装(zhuang)体(ti)上字符左下为(wei)第1管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)，其(qi)余管(guan)(guan)(guan)(guan)脚(jiao)(jiao)(jiao)逆时针类推(tui)）C-MOS：场效(xiao)应(ying)开关管(guan)(guan)(guan)(guan)；保(bao)护(hu)功能(neng)的实(shi)现(xian)者 ；连焊(han)(han)、虚(xu)焊(han)(han)、假(jia)焊(han)(han)、击穿时会(hui)造成电(dian)池无(wu)(wu)保(bao)护(hu)、无(wu)(wu)显示、输出电(dian)压低等(deng)不(bu)良现(xian)象。
总结(jie)：CMOS在保护板中一(yi)般(ban)为8个(ge)管脚(jiao)的(de)封装形式，它时由两个(ge)MOS管构成(cheng)，相当(dang)于(yu)两个(ge)开关，分(fen)别控制过充保护和(he)过放、过流、短路(lu)保护；其管脚(jiao)区分(fen)方法和(he)IC一(yi)样。
在(zai)锂电池保护板正(zheng)常情况下，Vdd为高电平，Vss、VM为低电平，Dout、Cout为高电平；当Vdd、Vss、VM任(ren)何一项参数变换时，Dout或Cout的(de)(de)电平将发(fa)生变化，此时MOSFET执行相应的(de)(de)动(dong)作（开、关电路），从(cong)而实现电路的(de)(de)保护和(he)恢复功(gong)能。
1．NTC电(dian)阻测试(shi)：
用(yong)万(wan)用(yong)表直接测量NTC电(dian)阻值(zhi)，再与(yu)《温度变化与(yu)NTC阻值(zhi)对(dui)(dui)照指导》对(dui)(dui)比。
2．识别(bie)电阻(zu)测(ce)试(shi)：
用(yong)万(wan)用(yong)表直接(jie)测量识别电(dian)阻值，再与《保(bao)护板重要项目管理表》对比(bi)。
3.自耗电测试：
调恒(heng)流(liu)源(yuan)为(wei)3.7V/500mA；万(wan)用(yong)表设置为(wei)uA档，表笔插入uA接孔，然后(hou)与(yu)恒(heng)流(liu)源(yuan)串联起(qi)来(lai)接保护板B+、B-如下图所(suo)示：此时万(wan)用(yong)表的读(du)数(shu)即为(wei)保护板的自(zi)耗电，如无读(du)数(shu)用(yong)镊子(zi)或(huo)锡线短接B-、P-，激活电路。
4.锂(li)电池短(duan)路保护测试：
电(dian)(dian)(dian)芯接到保护(hu)板(ban)B+、B-上，用(yong)镊子或锡线(xian)短(duan)接B-、P-，再短(duan)接P+、P-；短(duan)路后用(yong)万用(yong)表测保护(hu)板(ban)开路电(dian)(dian)(dian)压（如(ru)下(xia)图所示(shi)）；反复短(duan)接3-5次，此时万用(yong)表读数应(ying)与电(dian)(dian)(dian)芯一(yi)致，保护(hu)板(ban)应(ying)无冒(mao)烟、爆裂等现象。
如上(shang)图(tu)所(suo)示接好电路(lu)，按照重要项目管理表(biao)设置好锂易安(an)数(shu)据，再(zai)按自动按钮，接好后按红表(biao)笔上(shang)的按钮进行测试(shi)。此时锂易安(an)测试(shi)仪的灯应逐次点亮，表(biao)示性能(neng)OK。按显(xian)示键检(jian)查(cha)测试(shi)数(shu)据：‘Chg’表(biao)示过(guo)充保护(hu)电压；‘Dis’表(biao)过(guo)放保护(hu)电压；‘Ocur’表(biao)示过(guo)流(liu)保护(hu)电流(liu)。
此(ci)类(lei)不(bu)良(liang)(liang)首先排除电(dian)(dian)(dian)(dian)(dian)芯不(bu)良(liang)(liang)（电(dian)(dian)(dian)(dian)(dian)芯本来(lai)无(wu)电(dian)(dian)(dian)(dian)(dian)压(ya)或电(dian)(dian)(dian)(dian)(dian)压(ya)低(di)），如果电(dian)(dian)(dian)(dian)(dian)芯不(bu)良(liang)(liang)则应测试保(bao)护板的自(zi)耗电(dian)(dian)(dian)(dian)(dian)，看是(shi)否是(shi)保(bao)护板自(zi)耗电(dian)(dian)(dian)(dian)(dian)过(guo)大导致电(dian)(dian)(dian)(dian)(dian)芯电(dian)(dian)(dian)(dian)(dian)压(ya)低(di)。如果电(dian)(dian)(dian)(dian)(dian)芯电(dian)(dian)(dian)(dian)(dian)压(ya)正(zheng)常，则是(shi)由(you)于保(bao)护板整个回(hui)路(lu)不(bu)通（元器件(jian)虚(xu)焊(han)、假焊(han)、FUSE不(bu)良(liang)(liang)、PCB板内部电(dian)(dian)(dian)(dian)(dian)路(lu)不(bu)通、过(guo)孔不(bu)通、MOS、IC损(sun)坏等(deng)）。具(ju)体(ti)分析
步骤如下：
（一）、用万用表黑(hei)表笔接电(dian)芯负(fu)极，红(hong)表笔依次接FUSE、R1电(dian)阻(zu)两端(duan)，IC的Vdd、Dout、Cout端(duan)，P+端(duan)（假(jia)设(she)电(dian)芯电(dian)压为(wei)3.8V），逐段进行(xing)分析，此几(ji)个测试点(dian)都应(ying)为(wei)3.8V。若不是，则此段电(dian)路有问题。
1. FUSE两(liang)端电压有变化：测试FUSE是否导(dao)通，若(ruo)导(dao)通则是PCB板内部(bu)电路不通；若(ruo)不导(dao)通则FUSE有问题（来料不良、过流损坏（MOS或IC控制失效）、材质有问题（在MOS或IC动作(zuo)之前FUSE被(bei)烧坏），然后用导(dao)线(xian)短接FUSE，继续往(wang)后分析。
2. R1电(dian)阻(zu)两端电(dian)压有(you)变(bian)化：测试R1电(dian)阻(zu)值(zhi)，若(ruo)电(dian)阻(zu)值(zhi)异(yi)常，则可(ke)能是(shi)虚(xu)焊，电(dian)阻(zu)本身(shen)断裂。若(ruo)电(dian)阻(zu)值(zhi)无异(yi)常，则可(ke)能是(shi)IC内部电(dian)阻(zu)出现问题。
3. IC测(ce)试端(duan)电压有(you)变化：Vdd端(duan)与(yu)R1电阻(zu)相(xiang)连。Dout、Cout端(duan)异(yi)常,则是由于IC虚焊或损(sun)坏。
4. 若(ruo)前(qian)面电压都(dou)无变化，测(ce)试B-到P+间的电压异(yi)常，则是由(you)于(yu)保护板正极过孔不通。
（二）、万(wan)用表红表笔接电芯(xin)正极，激活MOS管(guan)后(hou)，黑表笔依次接MOS管(guan)2、3脚，6、7脚，P-端。
1.MOS管(guan)2、3脚，6、7脚电压(ya)有变化,则表示MOS管(guan)异常。
2.若MOS管电压(ya)无变化，P-端电压(ya)异常，则是由于保护板(ban)负极(ji)过(guo)孔(kong)不通。
1. VM端电阻出现问(wen)题：可用(yong)万用(yong)表(biao)一表(biao)笔(bi)接(jie)IC2脚(jiao)(jiao)(jiao)，一表(biao)笔(bi)接(jie)与VM端电阻相连的MOS管(guan)管(guan)脚(jiao)(jiao)(jiao)，确认其电阻值大小(xiao)。看电阻与IC、MOS管(guan)脚(jiao)(jiao)(jiao)有无(wu)虚焊(han)。
2. IC、MOS异常：由(you)于过放保护(hu)(hu)与过流、短路(lu)保护(hu)(hu)共用一个(ge)MOS管(guan)，若短路(lu)异常是(shi)由(you)于MOS出现问题，则此(ci)板(ban)应无过放保护(hu)(hu)功(gong)能。
3. 以上为正(zheng)常(chang)状况下(xia)的(de)不良(liang)，也可能出(chu)现IC与MOS配置不良(liang)引起的(de)短路异(yi)常(chang)。如前期出(chu)现的(de)BK-901，其(qi)(qi)型号为‘312D’的(de)IC内延迟时间过(guo)长，导致在(zai)IC作出(chu)相应动作控制之前MOS或其(qi)(qi)它元器件已被(bei)损坏。注：其(qi)(qi)中确(que)定IC或MOS是(shi)否发生异(yi)常(chang)最简易、直接的(de)方(fang)法就是(shi)对有怀疑的(de)元器件进(jin)行更换。
1. 设(she)计时所用IC本来(lai)没有自(zi)恢复(fu)功能,如G2J，G2Z等。
2. 仪(yi)器设(she)置短路恢复时(shi)间过(guo)短，或(huo)短路测试(shi)时(shi)未将(jiang)(jiang)负载移开，如(ru)用(yong)(yong)万用(yong)(yong)表(biao)电(dian)压档进(jin)行(xing)短路表(biao)笔(bi)短接(jie)后未将(jiang)(jiang)表(biao)笔(bi)从测试(shi)端移开（万用(yong)(yong)表(biao)相当于一个几(ji)兆的负载）。
3. P+、P-间漏电(dian)，如焊盘之间存在(zai)带(dai)杂质(zhi)的(de)松香，带(dai)杂质(zhi)的(de)黄胶或P+、P-间电(dian)容(rong)被击穿,IC Vdd到Vss间被击穿.（阻值只有几K到几百K）.
4. 如果(guo)以上都没问题，可(ke)能(neng)IC被击(ji)穿，可(ke)测试IC各管脚之间阻(zu)值。
1. 由于MOS内(nei)阻相(xiang)对比较(jiao)稳定，出(chu)现内(nei)阻大(da)情况，首先怀疑的应该是FUSE或(huo)PTC这些内(nei)阻相(xiang)对比较(jiao)容易发生(sheng)变(bian)化(hua)的元器(qi)件。
2. 如(ru)果FUSE或PTC阻(zu)(zu)值(zhi)(zhi)正常，则视保(bao)护板结构检(jian)测P+、P-焊盘与元器件面之间的孔(kong)阻(zu)(zu)值(zhi)(zhi)，可能过孔(kong)出现微断现象，阻(zu)(zu)值(zhi)(zhi)较大(da)。
3. 如果(guo)以(yi)上多没(mei)有(you)问题(ti)，就要怀疑MOS是(shi)(shi)否(fou)(fou)(fou)出现异常：首(shou)先确定(ding)焊(han)接(jie)(jie)有(you)没(mei)有(you)问题(ti)；其(qi)次看板的(de)厚度(du)（是(shi)(shi)否(fou)(fou)(fou)容易弯折），因为弯折时可能导致(zhi)管脚焊(han)接(jie)(jie)处(chu)异常；再将MOS管放(fang)到显微镜下观测是(shi)(shi)否(fou)(fou)(fou)破裂(lie)；最(zui)后用(yong)万用(yong)表测试MOS管脚阻值，看是(shi)(shi)否(fou)(fou)(fou)被击穿。
1. ID电(dian)(dian)(dian)阻(zu)本身由(you)于虚焊(han)(han)、断裂或因(yin)电(dian)(dian)(dian)阻(zu)材质不(bu)过(guo)关而出现异常：可重新(xin)焊(han)(han)接(jie)电(dian)(dian)(dian)阻(zu)两端，若重焊(han)(han)后ID正常则(ze)是电(dian)(dian)(dian)阻(zu)虚焊(han)(han)，若断裂则(ze)电(dian)(dian)(dian)阻(zu)会在重焊(han)(han)后从中裂开。
2. ID过孔不导通：可用(yong)万用(yong)表(biao)测(ce)试(shi)过孔两端。
3. 内部线路(lu)(lu)出现(xian)问题(ti)：可刮开阻焊漆看(kan)内部电(dian)路(lu)(lu)有无(wu)断开、短(duan)路(lu)(lu)现(xian)象。
1、 I2C材(cai)料(liao)写(xie)入及核对，如O2、DS、TI、及各家MCU计(ji)划等
2. 写入生产(chan)日期(qi)(当天日期(qi))和系列(lie)号--- Write Serial Number and Manu date
3. 补白：SMBUS,I2C，HDQ通(tong)信口等；
3.开路电(dian)压测验：测量加(jia)载电(dian)压后，MOS管是否能正常(chang)翻开；
4. 带(dai)载电(dian)压(ya)测验：测量维护(hu)板的带(dai)载才干，然(ran)后反(fan)响维护(hu)直(zhi)流阻抗
5. VCC电压(ya)(ya)测量（芯片的作业电压(ya)(ya)是否(fou)正常(chang)）
6. 芯片的作业频(pin)(pin)率测量（芯片的作业晶振频(pin)(pin)率）
7. 导通电阻测量（MOS管及FUSE阻值测量）；
8. 辨认电阻—IDR测量；
9. 热敏电阻---THR；
10. 正常状况的静(jing)态功耗电流&休(xiu)眠静(jing)态功耗（sleep）
11、关断状况的（Shout Down）静态功耗电流；
12. 单节电池过充(chong)保护测验（COV）：
A、保(bao)护(hu)下限：测验保(bao)护(hu)板是否提(ti)前保(bao)护(hu)，影响(xiang)电(dian)池容量值(zhi)；
B、保(bao)护上限：测验保(bao)护板是否有保(bao)护，影响电池的安全性；
C、保护(hu)(hu)延(yan)时(shi)(shi)刻上、下限：保护(hu)(hu)延(yan)时(shi)(shi)刻是否在规划(hua)规模；
D、恢复测验：保护后，是否能恢复，联系电池能否再次运用(yong)问题。
13. 单节电(dian)池过放保(bao)护测(ce)验（CUV）；
A、保(bao)护值上下限:一(yi)个(ge)是(shi)，电(dian)池能否(fou)放到最(zui)底值，容量能否(fou)彻底放出来，一(yi)个(ge)是(shi)必定要保(bao)护，不(bu)然影响电(dian)池的寿数；
B、保(bao)护(hu)延(yan)时刻：保(bao)护(hu)延(yan)时刻是否在规(gui)划规(gui)模，
C、恢(hui)复值、恢(hui)复时刻：保护后，是否(fou)能(neng)恢(hui)复，联(lian)系电(dian)池能(neng)否(fou)再次运用问题。
14.PACK电池(chi)过压(ya)保护测验（POV）保护值、保护延(yan)时刻、恢复(fu)值、恢复(fu)时刻（如果有(you)(you)测COV，POV不必测，一(yi)般比较不主张只测POV，由于总组的(de)POV即(ji)便有(you)(you)保护，并不代表每(mei)一(yi)节的(de)都能够保护，万一(yi)有(you)(you)某一(yi)节不保护了，那就(jiu)很(hen)风(feng)险。）
15. PACK电池低压(ya)保(bao)护测验(yan)（PUV）；保(bao)护值、保(bao)护延时刻(ke)、恢复值、恢复时刻(ke)；原理同CUV,CUV有(you)测CUV，可不测PUV，理由同POV；
16. 充电过流保护（OCCHG）；
A、保护值(zhi)上(shang)下限：电(dian)(dian)流太小，关系充电(dian)(dian)时刻，电(dian)(dian)流过(guo)大，关系电(dian)(dian)池寿数；
B、保护延时刻(ke)：关系电池发(fa)热堪至烧维护板问题；
C、恢复(fu)值、恢复(fu)时刻：电池的再次运用；
17. 放电过流保护（OCDSG）；
A、保护(hu)(hu)值上(shang)下(xia)限：显得优为重(zhong)要，下(xia)限，不能提前保护(hu)(hu)，不然影响(xiang)功率，车(che)跑(pao)不快(kuai)、电动工具(ju)转(zhuan)不动等，上(shang)限必定(ding)维(wei)护(hu)(hu)，不维(wei)护(hu)(hu)导至烧电机(ji)、电池发(fa)热等问题；
B、保(bao)护(hu)延(yan)时刻上(shang)下(xia)限:这个也比较重要，下(xia)限不保(bao)护(hu)，如果提(ti)前保(bao)护(hu)了，电(dian)动工具，会(hui)导(dao)致旋不紧；上(shang)限不保(bao)护(hu)，可能导(dao)致烧电(dian)机(ji)、电(dian)池发热(re)等问题；
C、恢复值、恢复时刻(ke)：影响(xiang)电池再次运用；
18. 堵转电流测验；保(bao)护值、保(bao)护延时刻(ke)、恢(hui)复值、恢(hui)复时刻(ke)(电动工(gong)具(ju)应该(gai)是适当重要)
19. 短路保(bao)护测(ce)验--- (Short circuit protection)，一般比较难(nan)测(ce)验，会(hui)危(wei)害保(bao)护器材
20. 充电过温保(bao)护(hu)测(ce)验及恢(hui)复测(ce)验；
21. 放电过温保护(hu)测验恢复测验；
22. 充电过低温保护(hu)测(ce)验(yan)恢(hui)复测(ce)验(yan)；
23. 放电过低温保护测验恢复测验；
24. 预充(chong)测验---UDPPC； 过(guo)(guo)放(fang)保(bao)护(hu)：当电(dian)(dian)(dian)池(chi)(chi)电(dian)(dian)(dian)快要用完时(shi)，电(dian)(dian)(dian)压(ya)到(dao)一个要求的(de)最(zui)低值，保(bao)护(hu)板(ban)也会封闭，不能在(zai)(zai)放(fang)电(dian)(dian)(dian)了(le)，产(chan)品因而会主(zhu)(zhu)动关机(ji)，构成的(de)一种(zhong)过(guo)(guo)放(fang)保(bao)护(hu)效果。过(guo)(guo)充(chong)保(bao)护(hu)：在(zai)(zai)给(ji)产(chan)品充(chong)电(dian)(dian)(dian)时(shi)，电(dian)(dian)(dian)压(ya)到(dao)达电(dian)(dian)(dian)池(chi)(chi)最(zui)高电(dian)(dian)(dian)压(ya)（4.2V）时(shi)，保(bao)护(hu)板(ban)就会主(zhu)(zhu)动断(duan)电(dian)(dian)(dian)封闭，显现充(chong)溢不在(zai)(zai)继续充(chong)电(dian)(dian)(dian)了(le)。构成的(de)一种(zhong)过(guo)(guo)充(chong)保(bao)护(hu)效果。
短(duan)路保护(hu)：当电池不(bu)小心短(duan)路时(shi)，保护(hu)板会在几毫秒(miao)内主动封闭，不(bu)会在通电，这(zhei)时(shi)就(jiu)是正负极碰到一(yi)(yi)块(kuai)也没事，构成的一(yi)(yi)种短(duan)路保护(hu)不(bu)会引起爆破事件发作。
过电(dian)流(liu)(liu)保(bao)护：当电(dian)池放电(dian)时，保(bao)护板(ban)会有一个最大的约束电(dian)流(liu)(liu)，不同(tong)产品是(shi)不一样的，当放电(dian)超(chao)越这个电(dian)流(liu)(liu)保(bao)护板(ban)也会主(zhu)动(dong)封闭(bi)。
1：锂电池类型和容量(liang)选择
首要要依据自(zi)己电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)机(ji)功(gong)率(lv)(lv)（需(xu)求实践(jian)功(gong)率(lv)(lv)，一(yi)(yi)般(ban)骑行(xing)(xing)速度(du)会对应一(yi)(yi)个相应实践(jian)功(gong)率(lv)(lv)）来核算电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)需(xu)求供(gong)给的(de)(de)(de)继(ji)续(xu)(xu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。比方(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)机(ji)继(ji)续(xu)(xu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)20a（48v下(xia)1000w电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)机(ji)），那么就(jiu)需(xu)求电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)能(neng)够长时(shi)刻供(gong)给20a电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)而(er)温升(sheng)很低（哪怕夏日外面35度(du)温度(du)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)温度(du)也最好(hao)操(cao)控在(zai)50度(du)以下(xia)）。别(bie)的(de)(de)(de)如果(guo)48v下(xia)20a电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，超压一(yi)(yi)倍（96v，比方(fang)ecpu3档(dang)）后继(ji)续(xu)(xu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)到50a左右。如果(guo)喜爱长时(shi)刻超压运(yun)用(yong)，那么请选用(yong)能(neng)继(ji)续(xu)(xu)供(gong)给50a电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)（仍是留(liu)意温升(sheng)问题）。这儿(er)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)继(ji)续(xu)(xu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)不是商(shang)家标称(cheng)的(de)(de)(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)才干(gan)。商(shang)家标称(cheng)几(ji)(ji)C（或几(ji)(ji)十几(ji)(ji)百安培(pei)）都(dou)是电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)才干(gan)，而(er)真的(de)(de)(de)在(zai)这种电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)下(xia)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)发(fa)热(re)很严(yan)峻的(de)(de)(de)，如果(guo)不做好(hao)散热(re)，电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)寿数会很短。（而(er)我们电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)动车运(yun)用(yong)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)环境是电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)扎堆排放(fang)(fang)，根本不留(liu)空隙，包的(de)(de)(de)很严(yan)实，更(geng)别(bie)提怎样做好(hao)强行(xing)(xing)风(feng)冷散热(re)了）。我们的(de)(de)(de)运(yun)用(yong)环境很恶劣。电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)需(xu)降(jiang)额运(yun)用(yong)。评估(gu)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)放(fang)(fang)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)才干(gan)就(jiu)是看这个电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)下(xia)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)(chi)对应温升(sheng)是多少。
这(zhei)(zhei)儿论说的仅有准(zhun)则其实(shi)是运用进程中电(dian)(dian)(dian)池(chi)的温升（高温是锂(li)电(dian)(dian)(dian)寿数死敌(di)）。最(zui)好(hao)电(dian)(dian)(dian)池(chi)温度(du)(du)操(cao)(cao)控在(zai)50度(du)(du)以(yi)下。（20-30度(du)(du)之间最(zui)好(hao)）。这(zhei)(zhei)也意味着如果是容量型锂(li)电(dian)(dian)(dian)（操(cao)(cao)控在(zai)0.5C以(yi)下放(fang)(fang)(fang)电(dian)(dian)(dian)），供(gong)给20a的继续放(fang)(fang)(fang)电(dian)(dian)(dian)电(dian)(dian)(dian)流(liu)需(xu)求40ah以(yi)上容量（当然(ran)最(zui)主要是要看电(dian)(dian)(dian)池(chi)内(nei)阻）。如果是动(dong)(dong)力型锂(li)电(dian)(dian)(dian)，依(yi)照1C继续放(fang)(fang)(fang)电(dian)(dian)(dian)是正(zheng)常的。哪怕A123超(chao)低内(nei)阻动(dong)(dong)力型锂(li)电(dian)(dian)(dian)，也平常最(zui)好(hao)在(zai)1C放(fang)(fang)(fang)电(dian)(dian)(dian)（不超(chao)越2C为好(hao)，2C放(fang)(fang)(fang)电(dian)(dian)(dian)其实(shi)只能放(fang)(fang)(fang)半(ban)个小时就没电(dian)(dian)(dian)了(le)，没太(tai)大运用价值）。容量选择就看车子存放(fang)(fang)(fang)空(kong)间巨细(xi)，个人开销(xiao)预算(suan)，希望(wang)车子活动(dong)(dong)规模巨细(xi)等要素。（小容量的一般(ban)有必要动(dong)(dong)力型锂(li)电(dian)(dian)(dian)）
2：电池的(de)选择拼装(zhuang)
串联(lian)运(yun)用锂电(dian)(dian)的(de)大忌是(shi)电(dian)(dian)池(chi)自(zi)(zi)放(fang)(fang)电(dian)(dian)严峻不(bu)均(jun)(jun)衡(heng)。只需我们都(dou)一(yi)样(yang)不(bu)均(jun)(jun)衡(heng)没联(lian)系，问(wen)题(ti)是(shi)这种状(zhuang)况(kuang)是(shi)急(ji)不(bu)稳定(ding)状(zhuang)况(kuang)，好的(de)电(dian)(dian)池(chi)自(zi)(zi)放(fang)(fang)电(dian)(dian)很(hen)小，要坏的(de)电(dian)(dian)池(chi)自(zi)(zi)放(fang)(fang)电(dian)(dian)很(hen)大，自(zi)(zi)放(fang)(fang)电(dian)(dian)不(bu)小不(bu)大的(de)状(zhuang)况(kuang)一(yi)般(ban)是(shi)由好转坏的(de)状(zhuang)况(kuang)，这个(ge)进程(cheng)是(shi)不(bu)稳定(ding)的(de)。所以需求把(ba)自(zi)(zi)放(fang)(fang)电(dian)(dian)大的(de)电(dian)(dian)池(chi)选择出(chu)来，只留自(zi)(zi)放(fang)(fang)电(dian)(dian)小的(de)电(dian)(dian)池(chi)配组(zu)（一(yi)般(ban)合格(ge)品(pin)自(zi)(zi)放(fang)(fang)电(dian)(dian)都(dou)小，厂家(jia)是(shi)测(ce)量过的(de)，问(wen)题(ti)是(shi)很(hen)多不(bu)合格(ge)品(pin)流(liu)入商(shang)场）。
在自放电(dian)(dian)(dian)小的(de)(de)(de)基(ji)础上，选择容(rong)(rong)(rong)量(liang)(liang)(liang)邻近(jin)(jin)(jin)的(de)(de)(de)串联(lian)。即便容(rong)(rong)(rong)量(liang)(liang)(liang)不邻近(jin)(jin)(jin)也不会影响(xiang)电(dian)(dian)(dian)池(chi)寿(shou)数，可(ke)是(shi)会影响(xiang)整(zheng)(zheng)组电(dian)(dian)(dian)池(chi)的(de)(de)(de)可(ke)用(yong)容(rong)(rong)(rong)量(liang)(liang)(liang)，比方15个容(rong)(rong)(rong)量(liang)(liang)(liang)是(shi)20ah，只1个是(shi)18ah，那么(me)这(zhei)组电(dian)(dian)(dian)池(chi)总容(rong)(rong)(rong)量(liang)(liang)(liang)只能(neng)(neng)是(shi)18ah。用(yong)到最终会是(shi)这(zhei)个电(dian)(dian)(dian)池(chi)没电(dian)(dian)(dian)了(le)，维(wei)护板要(yao)维(wei)护了(le)，整(zheng)(zheng)组电(dian)(dian)(dian)池(chi)电(dian)(dian)(dian)压(ya)(ya)还比较(jiao)高（由于其它15个电(dian)(dian)(dian)池(chi)电(dian)(dian)(dian)压(ya)(ya)是(shi)正(zheng)常的(de)(de)(de)，还有电(dian)(dian)(dian)）。所以整(zheng)(zheng)组电(dian)(dian)(dian)池(chi)的(de)(de)(de)放电(dian)(dian)(dian)维(wei)护电(dian)(dian)(dian)压(ya)(ya)凹(ao)凸能(neng)(neng)看出整(zheng)(zheng)组电(dian)(dian)(dian)池(chi)容(rong)(rong)(rong)量(liang)(liang)(liang)是(shi)否一起（条件是(shi)整(zheng)(zheng)组电(dian)(dian)(dian)池(chi)满电(dian)(dian)(dian)的(de)(de)(de)时(shi)分有必要(yao)每个电(dian)(dian)(dian)芯都(dou)充溢(yi)电(dian)(dian)(dian)了(le)）。总归(gui)，容(rong)(rong)(rong)量(liang)(liang)(liang)凹(ao)凸不均衡不影响(xiang)电(dian)(dian)(dian)池(chi)寿(shou)数，仅仅影响(xiang)整(zheng)(zheng)组容(rong)(rong)(rong)量(liang)(liang)(liang)，所以尽量(liang)(liang)(liang)选择容(rong)(rong)(rong)量(liang)(liang)(liang)邻近(jin)(jin)(jin)的(de)(de)(de)拼装。
拼装电(dian)(dian)池有(you)必要做到电(dian)(dian)极间(jian)良好的(de)(de)欧(ou)姆触摸电(dian)(dian)阻(zu)(zu)。就(jiu)是电(dian)(dian)线(xian)和电(dian)(dian)极触摸电(dian)(dian)阻(zu)(zu)越小越好，不然触摸电(dian)(dian)阻(zu)(zu)大电(dian)(dian)极会发热，这(zhei)个热量会顺着电(dian)(dian)极传递给电(dian)(dian)芯内(nei)部影响电(dian)(dian)池寿数。当然拼装电(dian)(dian)阻(zu)(zu)大的(de)(de)体现就(jiu)是相同放电(dian)(dian)电(dian)(dian)流下(xia)电(dian)(dian)池组压降(jiang)大。（压降(jiang)一部分是电(dian)(dian)芯内(nei)阻(zu)(zu)，一部分是拼装的(de)(de)触摸电(dian)(dian)阻(zu)(zu)和电(dian)(dian)线(xian)电(dian)(dian)阻(zu)(zu)）
3：保(bao)护板选(xuan)择及充(chong)放电运用事(shi)项(xiang)
（数据针对磷酸铁(tie)锂(li)电池，一般3.7v电池原理(li)相同(tong)，仅仅数据不同(tong)）
保(bao)护板(ban)意(yi)图是(shi)用来(lai)保(bao)护电(dian)池防止(zhi)过(guo)充(chong)电(dian)和过(guo)放(fang)电(dian)，防止(zhi)大(da)电(dian)流损坏(huai)电(dian)池，而且(qie)满(man)电(dian)时做(zuo)电(dian)池电(dian)压均(jun)衡（均(jun)衡才干一(yi)般都比(bi)较小，所(suo)以(yi)如果有(you)自放(fang)电(dian)大(da)的(de)电(dian)芯保(bao)护板(ban)是(shi)很难均(jun)衡的(de)，也有(you)任何状况都做(zuo)均(jun)衡的(de)保(bao)护板(ban)，就是(shi)从开端(duan)充(chong)电(dian)就做(zuo)均(jun)衡，好像很少）。
为了(le)电(dian)(dian)(dian)池组(zu)寿数，主张任何时(shi)分电(dian)(dian)(dian)池充(chong)电(dian)(dian)(dian)电(dian)(dian)(dian)压(ya)都不(bu)(bu)要超越3.6v，意味(wei)着维(wei)护板保(bao)护动作电(dian)(dian)(dian)压(ya)不(bu)(bu)高于3.6v，均衡电(dian)(dian)(dian)压(ya)主张3.4v-3.5v（每个电(dian)(dian)(dian)芯(xin)3.4v现已充(chong)进大(da)于99%电(dian)(dian)(dian)量(liang)了(le)，指的(de)停止状况，大(da)电(dian)(dian)(dian)流充(chong)电(dian)(dian)(dian)时(shi)电(dian)(dian)(dian)压(ya)会升高）。电(dian)(dian)(dian)池放(fang)电(dian)(dian)(dian)保(bao)护电(dian)(dian)(dian)压(ya)一般(ban)2.5v以上就能够（2v以上问题不(bu)(bu)大(da)，一般(ban)很少有时(shi)机用到彻(che)底没(mei)电(dian)(dian)(dian)，所以这个要求不(bu)(bu)高）。
充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)器主张(zhang)最(zui)高(gao)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)（最(zui)终一步充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)够(gou)为(wei)(wei)最(zui)高(gao)恒压(ya)(ya)(ya)充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)形式）为(wei)(wei)3.5*串数(shu)(shu)，比方(fang)16串的(de)为(wei)(wei)56v左(zuo)右。平(ping)(ping)常(chang)充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)能(neng)(neng)够(gou)每节(jie)(jie)均(jun)(jun)(jun)(jun)匀(yun)3.4v截止充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)（根本充(chong)溢(yi)了(le)），这样(yang)电(dian)(dian)(dian)(dian)(dian)(dian)池寿数(shu)(shu)有(you)(you)保(bao)证(zheng)，可是(shi)由(you)于(yu)保(bao)护(hu)板还(hai)没(mei)开端均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)，如果电(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)有(you)(you)自(zi)(zi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)大(da)(da)的(de)，会随着时(shi)刻推移(yi)，体现(xian)为(wei)(wei)整(zheng)组容(rong)量逐步下降(jiang)。所(suo)以(yi)(yi)还(hai)需(xu)(xu)求定时(shi)（比方(fang)每周(zhou)）把(ba)电(dian)(dian)(dian)(dian)(dian)(dian)池每节(jie)(jie)充(chong)到3.5v-3.6v并坚持(chi)几个小时(shi)（只需(xu)(xu)均(jun)(jun)(jun)(jun)匀(yun)大(da)(da)于(yu)均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)发(fa)动(dong)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)就(jiu)(jiu)能(neng)(neng)够(gou)了(le)），自(zi)(zi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)越大(da)(da)，均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)需(xu)(xu)求时(shi)刻越长(zhang)，自(zi)(zi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)过大(da)(da)的(de)电(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)现(xian)已很难均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)，需(xu)(xu)求除掉。所(suo)以(yi)(yi)选择保(bao)护(hu)板的(de)时(shi)分，尽量选择3.6v过压(ya)(ya)(ya)维(wei)护(hu)的(de)，3.5v左(zuo)右发(fa)动(dong)均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)的(de)。（商场上(shang)(shang)大(da)(da)部分是(shi)3.8v以(yi)(yi)上(shang)(shang)过压(ya)(ya)(ya)维(wei)护(hu)，3.6v以(yi)(yi)上(shang)(shang)发(fa)动(dong)均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)）。其实选择适宜均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)发(fa)动(dong)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)比维(wei)护(hu)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)还(hai)重(zhong)要(yao)，由(you)于(yu)最(zui)高(gao)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)能(neng)(neng)够(gou)靠调节(jie)(jie)充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)器最(zui)高(gao)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)约束（就(jiu)(jiu)是(shi)平(ping)(ping)常(chang)让维(wei)护(hu)板没(mei)时(shi)机(ji)做(zuo)高(gao)压(ya)(ya)(ya)维(wei)护(hu)），但如果均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)高(gao)了(le)，电(dian)(dian)(dian)(dian)(dian)(dian)池组没(mei)时(shi)机(ji)均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)（除非充(chong)电(dian)(dian)(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)大(da)(da)于(yu)均(jun)(jun)(jun)(jun)衡(heng)(heng)(heng)电(dian)(dian)(dian)(dian)(dian)(dian)压(ya)(ya)(ya)，但这样(yang)影响电(dian)(dian)(dian)(dian)(dian)(dian)池寿数(shu)(shu)），电(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)因自(zi)(zi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)容(rong)量会慢(man)慢(man)下降(jiang)（自(zi)(zi)放(fang)电(dian)(dian)(dian)(dian)(dian)(dian)为(wei)(wei)0的(de)抱负电(dian)(dian)(dian)(dian)(dian)(dian)芯(xin)(xin)是(shi)不(bu)存在的(de)）。
保护板(ban)继续放电电流才(cai)干(gan)。这个(ge)是(shi)(shi)最不好谈论的东(dong)西。由(you)于(yu)单说维护板(ban)限流才(cai)干(gan)没含义。比方(fang)一个(ge)75nf75管(guan)你让它继续通过50a电流（这时(shi)发热(re)功(gong)率大概30w左右，同口(kou)板(ban)至(zhi)少(shao)2个(ge)串联60w），只需有散热(re)片满意散热(re)是(shi)(shi)没问题的。能(neng)够一向坚持在50a乃至(zhi)更高(gao)不烧管(guan)。可是(shi)(shi)你不能(neng)说这个(ge)保护板(ban)能(neng)继续50a电流。由(you)于(yu)我们的保护板(ban)大多都放在电池(chi)(chi)盒里边和电池(chi)(chi)离的很近，乃至(zhi)是(shi)(shi)近靠着。所以(yi)这么高(gao)温度会导热(re)电池(chi)(chi)升温，问题来了，高(gao)温是(shi)(shi)电池(chi)(chi)的死敌。
所(suo)以保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)的运用(yong)环(huan)境决议了(le)如何(he)选(xuan)择限流(liu)巨细（而不(bu)是(shi)保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)自身(shen)电(dian)流(liu)才干）。如果是(shi)把保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)从(cong)电(dian)池(chi)盒(he)拿出来，那么几乎随便一(yi)个带散热(re)片的保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)都能(neng)搞定50a继续(xu)电(dian)流(liu)乃至更高（这(zhei)时(shi)只(zhi)考虑保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)才干，不(bu)必忧虑温升给电(dian)芯带来危害(hai)）。下(xia)面说说我们(men)常用(yong)环(huan)境，就(jiu)是(shi)和(he)电(dian)池(chi)在(zai)同(tong)一(yi)个密闭空间里。这(zhei)时(shi)保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)的最大发热(re)功率最好操控在(zai)10w以下(xia)（如果是(shi)小(xiao)保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)需求(qiu)5w以下(xia)，大体积保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)能(neng)够10w以上(shang)，由(you)于自身(shen)散热(re)好，温度(du)(du)不(bu)会(hui)太高），至于多少(shao)适宜，主张继续(xu)电(dian)流(liu)时(shi)整个板(ban)(ban)(ban)(ban)子最高温度(du)(du)不(bu)超越(yue)60度(du)(du)（50度(du)(du)以下(xia)最好）。理论上(shang)保护(hu)(hu)(hu)板(ban)(ban)(ban)(ban)温度(du)(du)越(yue)低越(yue)好，对电(dian)芯越(yue)没影响。
同(tong)(tong)口板(ban)(ban)(ban)由于充电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)mos串联(lian)，所以相(xiang)同(tong)(tong)状况比异(yi)口板(ban)(ban)(ban)发(fa)(fa)热翻倍(bei)，为(wei)(wei)(wei)了相(xiang)同(tong)(tong)发(fa)(fa)热，只要管(guan)(guan)子(zi)(zi)数量(liang)高(gao)4倍(bei)（相(xiang)同(tong)(tong)类型(xing)mos条件下）。 我们核算一下，假设50a继续(xu)电(dian)(dian)(dian)(dian)流(liu)(liu)，那(nei)么mos内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)为(wei)(wei)(wei)2毫(hao)欧(ou)姆(mu)(mu)（需求(qiu)(qiu)5个(ge)75nf75管(guan)(guan)才干(gan)得到(dao)这个(ge)等效内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)），发(fa)(fa)热功率是50*50*0.002=5w。这时是能够的(de)(de)(de)（其实(shi)2毫(hao)欧(ou)姆(mu)(mu)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)的(de)(de)(de)mos电(dian)(dian)(dian)(dian)流(liu)(liu)才干(gan)100a以上都(dou)没问(wen)题(ti)，但发(fa)(fa)热大）。如(ru)果(guo)是同(tong)(tong)口板(ban)(ban)(ban)，需求(qiu)(qiu)4个(ge)2毫(hao)欧(ou)姆(mu)(mu)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)mos（每2个(ge)并联(lian)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)为(wei)(wei)(wei)1毫(hao)欧(ou)姆(mu)(mu)，再串联(lian)，总内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)等于2毫(hao)欧(ou)姆(mu)(mu).如(ru)果(guo)用(yong)(yong)75管(guan)(guan)，需求(qiu)(qiu)总数量(liang)20只）。100a继续(xu)电(dian)(dian)(dian)(dian)流(liu)(liu)答应(ying)发(fa)(fa)热功率10w的(de)(de)(de)话，需求(qiu)(qiu)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)为(wei)(wei)(wei)1毫(hao)欧(ou)姆(mu)(mu)的(de)(de)(de)管(guan)(guan)子(zi)(zi)（当(dang)然能够通过mos并联(lian)得到(dao)相(xiang)同(tong)(tong)等效内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)），如(ru)果(guo)异(yi)口板(ban)(ban)(ban)数量(liang)仍是4倍(bei)，如(ru)果(guo)100a继续(xu)电(dian)(dian)(dian)(dian)流(liu)(liu)仍最高(gao)答应(ying)5w发(fa)(fa)热功率，那(nei)么只能用(yong)(yong)0.5毫(hao)欧(ou)姆(mu)(mu)管(guan)(guan)子(zi)(zi)，相(xiang)对于50a继续(xu)电(dian)(dian)(dian)(dian)流(liu)(liu)需求(qiu)(qiu)数量(liang)4倍(bei)mos才干(gan)相(xiang)同(tong)(tong)发(fa)(fa)热量(liang)）。所以在运用(yong)(yong)维护(hu)(hu)板(ban)(ban)(ban)时，为(wei)(wei)(wei)了下降温度，选(xuan)用(yong)(yong)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)小(xiao)的(de)(de)(de)板(ban)(ban)(ban)子(zi)(zi)，如(ru)果(guo)内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)现已断定那(nei)么请(qing)尽(jin)量(liang)让板(ban)(ban)(ban)子(zi)(zi)和外(wai)界(jie)散热好点。选(xuan)择维护(hu)(hu)板(ban)(ban)(ban)别听卖家忽(hu)悠的(de)(de)(de)继续(xu)多少(shao)(shao)电(dian)(dian)(dian)(dian)流(liu)(liu)才干(gan)，就(jiu)问(wen)保(bao)护(hu)(hu)板(ban)(ban)(ban)放电(dian)(dian)(dian)(dian)回路总内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)是多少(shao)(shao)就(jiu)能够自己(ji)算了（问(wen)用(yong)(yong)的(de)(de)(de)什(shen)么类型(xing)管(guan)(guan)子(zi)(zi)，用(yong)(yong)了多少(shao)(shao)数量(liang)，自己(ji)查内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)核算）。笔(bi)者感觉如(ru)果(guo)真的(de)(de)(de)在卖家标称(cheng)继续(xu)电(dian)(dian)(dian)(dian)流(liu)(liu)下放电(dian)(dian)(dian)(dian)，保(bao)护(hu)(hu)板(ban)(ban)(ban)温升应(ying)该比较高(gao)。所以最好降额选(xuan)择保(bao)护(hu)(hu)板(ban)(ban)(ban)。（说(shuo)50a继续(xu)，你用(yong)(yong)到(dao)30a就(jiu)好了，需求(qiu)(qiu)50a继续(xu)的(de)(de)(de)，最好买80a标称(cheng)继续(xu)的(de)(de)(de)）。运用(yong)(yong)48v ecpu的(de)(de)(de)用(yong)(yong)户，主张选(xuan)择保(bao)护(hu)(hu)板(ban)(ban)(ban)总内(nei)(nei)(nei)(nei)阻(zu)(zu)(zu)不大于2毫(hao)欧(ou)姆(mu)(mu)。
同口板和异(yi)口板差异(yi)：同口板是充放电(dian)同一根(gen)线，充电(dian)和放电(dian)都受(shou)保护。
异(yi)口(kou)板是充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)线和(he)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)线独立(li)，充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)口(kou)只充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)时保护(hu)过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)，如果(guo)从(cong)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)口(kou)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)则不(bu)维护(hu)（可是彻底(di)能(neng)(neng)(neng)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)，不(bu)过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)口(kou)电(dian)(dian)(dian)(dian)流才干一般(ban)比(bi)较小）。放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)口(kou)是放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)时保护(hu)过(guo)(guo)(guo)放(fang)(fang)(fang)，如果(guo)从(cong)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)口(kou)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)则不(bu)保护(hu)过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)（所(suo)以(yi)ecpu的反(fan)(fan)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)对异(yi)口(kou)板来说是彻底(di)能(neng)(neng)(neng)用(yong)的。而且反(fan)(fan)充(chong)(chong)(chong)(chong)(chong)进的能(neng)(neng)(neng)量绝(jue)比(bi)照运用(yong)的少，所(suo)以(yi)不(bu)必(bi)忧(you)虑(lv)因(yin)反(fan)(fan)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)池过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)了。除非刚充(chong)(chong)(chong)(chong)(chong)溢电(dian)(dian)(dian)(dian)出门，立(li)便是几公里的下坡，这(zhei)(zhei)样一向发动eabs反(fan)(fan)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)真有可能(neng)(neng)(neng)把电(dian)(dian)(dian)(dian)池搞过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)，这(zhei)(zhei)种状况根本不(bu)存(cun)在），不(bu)过(guo)(guo)(guo)正常(chang)运用(yong)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)绝(jue)对不(bu)能(neng)(neng)(neng)从(cong)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)口(kou)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)，除非自(zi)己一向监控充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)电(dian)(dian)(dian)(dian)压(ya)（比(bi)方暂时路旁边紧急大电(dian)(dian)(dian)(dian)流充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)，能(neng)(neng)(neng)够从(cong)放(fang)(fang)(fang)电(dian)(dian)(dian)(dian)口(kou)充(chong)(chong)(chong)(chong)(chong)电(dian)(dian)(dian)(dian)，不(bu)需求充(chong)(chong)(chong)(chong)(chong)溢就继续骑(qi)行，不(bu)必(bi)忧(you)虑(lv)过(guo)(guo)(guo)充(chong)(chong)(chong)(chong)(chong)）
算好你的电(dian)机最大(da)继续电(dian)流(liu)(liu)，选择适宜容量或动(dong)力的电(dian)池能满意这个(ge)继续电(dian)流(liu)(liu)而(er)温升得(de)到操控，选维(wei)(wei)护(hu)(hu)(hu)板(ban)内阻越小越好。维(wei)(wei)护(hu)(hu)(hu)板(ban)过(guo)流(liu)(liu)维(wei)(wei)护(hu)(hu)(hu)其实(shi)只需求短路维(wei)(wei)护(hu)(hu)(hu)等非正常运用维(wei)(wei)护(hu)(hu)(hu)就好了（千(qian)万(wan)别想(xiang)通过(guo)维(wei)(wei)护(hu)(hu)(hu)板(ban)限流(liu)(liu)来(lai)约束(shu)操控器(qi)(qi)或电(dian)机需求电(dian)流(liu)(liu)）。由于如果你电(dian)机需求50a电(dian)流(liu)(liu)，你非用维(wei)(wei)护(hu)(hu)(hu)板(ban)限流(liu)(liu)40a，会导(dao)致常常维(wei)(wei)护(hu)(hu)(hu)，操控器(qi)(qi)俄(e)然断电(dian)反而(er)简单坏操控器(qi)(qi)。（我的4组电(dian)池装车一(yi)年(nian)半了，从没(mei)有一(yi)次时(shi)机因(yin)大(da)电(dian)流(liu)(liu)放电(dian)维(wei)(wei)护(hu)(hu)(hu)板(ban)维(wei)(wei)护(hu)(hu)(hu)过(guo)，由于线(xian)路没(mei)短路过(guo)，而(er)且大(da)电(dian)流(liu)(liu)时(shi)往往空开就直接跳掉了，保(bao)护(hu)(hu)(hu)板(ban)一(yi)般答(da)应瞬间(jian)大(da)电(dian)流(liu)(liu)）。
9、锂电池(chi)保护板注意事(shi)项
1、不(bu)要(yao)把电(dian)容式锂(li)电(dian)池放在口袋里(li)
如果(guo)你要随(sui)身(shen)携(xie)带备(bei)用电(dian)(dian)(dian)池，请确保(bao)它们没法儿意(yi)外漏电(dian)(dian)(dian)；如果(guo)邻近有(you)什么导电(dian)(dian)(dian)终端会(hui)使你的(de)(de)电(dian)(dian)(dian)池发作点意(yi)外，适当好(hao)是采纳一个(ge)防范措施(shi)来保(bao)证(zheng)你的(de)(de)人生安全(quan)。一些(xie)电(dian)(dian)(dian)子烟厂商会(hui)在(zai)随(sui)配的(de)(de)套装里附赠一个(ge)电(dian)(dian)(dian)池的(de)(de)硅(gui)胶或许其他绝(jue)缘体的(de)(de)维(wei)护套，用这个(ge)把暴露的(de)(de)电(dian)(dian)(dian)池极彼此阻隔(ge)开来，防止它们之间发作磕碰，然(ran)后(hou)防止意(yi)外的(de)(de)爆破(po)事端。究(jiu)竟这玩意(yi)儿并不是放兜里就会(hui)随(sui)时爆破(po)的(de)(de)，关键看你怎样(yang)放？
2、如果电容(rong)式锂电池(chi)外(wai)包有异，请不要运用(yong)它(ta)
常(chang)(chang)常(chang)(chang)查看(kan)电(dian)(dian)(dian)池(chi)(chi)的(de)外包壳，尽管这是一层包装壳，却起到保护电(dian)(dian)(dian)池(chi)(chi)的(de)效果。随着(zhe)长时(shi)间地(di)充(chong)电(dian)(dian)(dian)和插(cha)拔，会不(bu)可防(fang)止(zhi)地(di)危害到电(dian)(dian)(dian)池(chi)(chi)的(de)外壳。所以(yi)要定时(shi)查看(kan)电(dian)(dian)(dian)池(chi)(chi)的(de)外包装，发现有洼陷或不(bu)明液体(ti)渗漏时(shi)，就得留(liu)意(yi)了(le)，这样的(de)电(dian)(dian)(dian)池(chi)(chi)千万(wan)不(bu)能(neng)再用，赶紧换电(dian)(dian)(dian)池(chi)(chi)，防(fang)止(zhi)电(dian)(dian)(dian)池(chi)(chi)漏液发作爆破(po)~实在是无法(fa)用肉眼区分(fen)电(dian)(dian)(dian)池(chi)(chi)的(de)好坏时(shi)，电(dian)(dian)(dian)池(chi)(chi)检测仪来(lai)帮你！
3、不(bu)要(yao)由于它酷，你(ni)就运用它
我们(men)都知道(dao)，部分动手(shou)能力强的(de)(de)玩家(jia)总喜(xi)欢标新立(li)异，追求(qiu)一些与众不同的(de)(de)设(she)备，于是(shi)混合在一起的(de)(de)配件并未经过相关仪器(qi)的(de)(de)安(an)全监(jian)测，当中(zhong)的(de)(de)细小误差虽说不大，但有时也会(hui)成为导致电子烟(yan)爆(bao)炸的(de)(de)元凶(xiong)。所以并不推(tui)荐！锂离子电(dian)(dian)池(chi)发生故障的(de)典型模式是(shi)，电(dian)(dian)解质(zhi)被加热至沸点(dian)，电(dian)(dian)池(chi)的(de)内部压力升(sheng)高到一个点(dian)，以至电(dian)(dian)池(chi)顶部的(de)封(feng)口(kou)板破裂(lie)，压力突(tu)然释放冲出电(dian)(dian)池(chi)的(de)密封(feng)端。
总结：
锂电(dian)(dian)(dian)运用需求操控最高(gao)温度（大电(dian)(dian)(dian)流放电(dian)(dian)(dian)引起的温升或和环境一起引起的），操控最高(gao)充电(dian)(dian)(dian)电(dian)(dian)(dian)压和最低放电(dian)(dian)(dian)电(dian)(dian)(dian)压（用保护板和充电(dian)(dian)(dian)器合作完成）。平常(chang)不(bu)必时(shi)最好(hao)使电(dian)(dian)(dian)池(chi)呆在渠道(dao)电(dian)(dian)(dian)压（磷酸铁锂3.25-3.3v左(zuo)右(you)）。保护(hu)(hu)板(ban)的内(nei)阻越(yue)低越(yue)好(hao)，越(yue)低越(yue)不发热。保护(hu)(hu)板(ban)限流巨细(xi)是靠康铜丝取样电阻决议的，但(dan)继续电流才干是mos决议的（由(you)于(yu)mos内(nei)阻决议温(wen)升）。
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