杰华特带来多款户外电源锂电保护芯片，支持电池保护及监控
锂电池具有电压平台高，能量密度大，寿命长的突出优势，一经诞生就被手机，笔记本电脑等随身设备广泛应用。多串锂电池组能够输出更大的功率，被人们用于移动电源及储能用途，轻便小巧，满足不同场合的应用需求。
而使用锂电池，就离不开电池组上的保护板了。保护板是由保护芯片和MOS管组成，实时的检测电池端电压和电流，在出现电池过压、欠压或者过流时，保护芯片控制MOS管，及时断开电池与电路的连接，防止电池在异常情况下出现危险。
杰华特针对多串电池应用，推出了一系列多串锂电保护芯片，分别为支持3-5串电池的JW3312保护芯片，支持3串电池的JW3313电池保护芯片，支持5-7串的JW3317电池保护芯片，具有数字接口，支持4-10串电池监控的JW3370电池保护芯片以及支持2-5串的二次侧电池保护芯片JW3410。
首先介绍的是杰华特JW3312。
JW3312是一颗支持3，4，5串锂电池的保护芯片，内部集成高精度电压检测电路，支持过充、过放、过流、过热以及电池断线保护。JW3312支持锂电池和磷酸铁锂电池，具有25mV过充电压检测精度，50mV过放检测精度，内置电池均衡功能，具有3μA待机功耗。JW3312提供TSSOP20封装，适用于可充电锂电池组，电动工具和UPS备份电池组。
JW3313是一颗支持3串锂电池的保护芯片，芯片支持电池过充、过放、过电流、电池温度以及开路检测。JW3313支持磷酸铁锂和锂电池应用，具备25mV过充检测精度和80mV过放检测精度，具备三阶段过电流保护，内置高精度电池温度检测，支持电池过热和过冷保护，具备1.5μA待机功耗。JW3313采用MSOP10封装，支持可充电锂电池组，电动工具等应用。
JW3317是一颗支持5，6，7串锂电池的保护芯片，支持级联应用，满足14串电池保护功能。芯片内置完善的电池保护功能，具备20mV电池过充检测精度和80mV电池过放保护精度，支持四档充电过电流检测的选择，支持三级过放电流延时，具备高精度电池温度检测功能，防止电池在高低温下充电，并且防止电池放电过热。
JW3317采用TSSOP-24封装，支持可充电锂电池组应用，电动自行车应用，备份电池系统应用。级联多串可满足混合动力汽车应用。
JW3370是一颗支持4-10串锂电池的保护芯片，内置14位ADC用于电池电压以及温度采集，16位ADC用于电池充放电电流采集。JW3370支持电池均衡功能，从而延长电池组的使用寿命。JW3370支持通过SPI总线与外部单片机通信，可检测串联电池组中的电池电压。
JW3370支持电池过充、过放、高低温，过电流以及单体开路保护，JW3370支持睡眠模式和运输模式降低电池组在库存及运输中的电量损耗。JW3370具备15μA睡眠电流和3μA运输电流，采用TSSOP38封装，支持电动自行车、备份电池应用以及混合动力汽车应用。
JW3410是一颗支持2到5串锂电池的二次保护芯片，内部集成高精度电压检测电路，用于锂电池过充保护。内置的高精度电压检测电路具有20mV精度，支持磷酸铁锂及锂电池过压保护，支持高压锂电池应用，具备不同的释放阈值和动作延时。
JW3410具有独立引脚用于过电压信号输出，芯片自动监测电池电压，当出现过充或者断线时，经过延时输出控制信号，可用于控制MOS管或三端保险丝，切断电路连接，保证电池安全。JW3410具有3μA功耗，采用MSOP8封装，适用于可充电锂电池组，电动工具及笔记本电脑电池电压监测。
充电头网总结
伴随着新能源技术的发展，锂电池作为优秀的能量载体，在多种应用场合中得到了非常广泛的应用。锂电池保护板作为锂电池安全应用的搭档，从传统的过充过放过流保护，演进到支持更高的精度，支持电池均衡功能，为电池提供了全面的保护功能。
杰华特针对户外电源电源以及锂电池储能应用推出的保护芯片，具有高精度过充保护功能，同时支持级联操作，可满足更高电压的应用。JW3370支持数字接口通讯，可输出电池电压信息，满足多串电池组中读取单体电压的需求，充分了解电池状态。
单片机锂电池容量测试仪设计小创意 附后实物及软件语言源代码
前几天在家看到我家的锂电吸尘器没电了，但是充满后用了一会就又没了，电量明明显示还有两格，心想这个东西太不靠谱了，于是就寻思如果能测试出电池的容量就好了，便自己动手做了一个锂电容量测试仪，然后实际测试了一下，发现准确度和精度都还可以，下面分享出来供大家学习参考一下。
说明：本次实验项目是用汇编语言开发的，如果感兴趣的小伙伴也可以试着用C语言开发一下哦！
老规矩废话不多说，先上实物图：
工作原理：此设计是用万能板搭建，显示用12864字库屏，主板与屏幕分开，这个单片机电池容量测试仪对于锂电/镍氢程序实现自动识别。该设备会自动识别电池类型（锂电池还是镍氢电池）。
识别的方法：电压高于2.7就是锂电，低于2.7高于2V就是锂电低电压，会有提示；高于1低于2，就是镍氢电池。左下角放电测试时会显示截止电压。
本设计仅供参考如果设计有不合理之处请大神勿喷，再次仅仅起到学习和抛砖引玉的效果。
本设计汇编语言参考源代码如下：
;-------------------------
; LCD12864.ASM
;
;12864液晶屏显示驱动程序
;-------------------------
SENDI:;------串行控制命令写入------------------------
; LCALL FD ;等忙时间
MOV RAM0,#15
DJNZ RAM0,$
;------------第一字节,11111000,从MCU到屏,控制字 ,rs,rw都为0
SETB RS ;片选为1
MOV R7,#5
SENDI1: SETB RW ;前四位都为1
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDI1
MOV R7,#3
SENDI2: CLR RW
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDI2
;-------第二三字节,8位的高四位------------------
MOV R6,#2
SENDI5: MOV R7,#4
SENDI3: RLC A
MOV RW,C
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDI3
MOV R7,#4
CLR C
SENDI4: MOV RW,C ;后4位全为0
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDI4
DJNZ R6,SENDI5
CLR RS
RET
;-----------------------------------------------
SENDD: ;------串行数据字节写入---------------------
; LCALL FD ;等忙时间
MOV RAM0,#15
DJNZ RAM0,$
;------------第一字节,11111000,从MCU到屏,控制字
SETB RS ;片选为1
MOV R7,#5
SENDD1: SETB RW ;前四位都为1
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDD1
CLR RW ;第三位,从MCU到LCD,0
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
SETB RW ;第二位,数据,1
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
CLR RW ;第1位,,0
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
;-------第二三字节,8位的高四位------------------
MOV R6,#2
SENDD5: MOV R7,#4
SENDD3: RLC A
MOV RW,C
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDD3
MOV R7,#4
CLR C
SENDD4: MOV RW,C ;后4位全为0
NOP
NOP
CLR E
NOP
NOP
NOP
NOP
SETB E
DJNZ R7,SENDD4
DJNZ R6,SENDD5
CLR RS
RET
/*从缓存取数据送显示*/
LCDDS: MOV DPTR,#TAB1F ;
LCDDS1: MOV A,@R0 ;取列表
MOVC A,@A+DPTR
LCALL SENDD
INC R0
DJNZ DSDAT,LCDDS1 ;取完N个数
RET
LCDDS2: MOV DPTR,#TAB1F
LCDDS3: MOV A,R0
MOV CA,@A+DPTR
LCALL SENDD
INC R0
DJNZ DSDAT,LCDDS3
RET
TAB10: DB " 电池容量测试 " ;
TAB11: DB "V=0.00V I=0.00A "
TAB12: DB "0:00:00 0mAh "
TAB13: DB "SV2.70V SR0.00A"
; 0 10 141618 22 30
TAB1F: DB "0123456789: -.=VRLAmD 待机....SV已结束! ",0
/*
TAB1:
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,96,0,0,96,0,0,0,0;
DB 0,0,192,0,102,0,195,128,99,0,99,96,49,128,0,0;
DB 0,0,192,0,99,0,222,0,97,128,99,252,49,128,0,0;
DB 0,0,192,0,96,0,198,192,96,240,103,96,49,128,0,0;
DB 0,0,192,0,126,0,255,128,127,176,121,240,49,240,0,0;
DB 0,0,248,7,192,3,204,3,248,1,231,48,63,176,0,0;
DB 0,31,152,0,243,0,219,128,126,192,103,240,241,224,0,0;
DB 0,1,152,0,243,0,254,0,118,96,118,48,49,252,0,0;
DB 0,1,176,1,182,1,247,240,236,0,251,224,63,128,0,0;
DB 0,3,48,1,188,15,254,1,225,193,225,188,113,128,0,0;
DB 0,3,48,195,56,96,198,199,111,3,111,225,195,192,0,0;
DB 0,6,48,198,112,96,222,192,99,0,97,192,6,96,0,0;
DB 0,12,48,204,240,97,223,193,227,240,99,96,12,56,0,0;
DB 0,56,31,152,31,224,248,192,254,0,102,48,56,30,0,0;
DB 0,0,0,0,0,0,0,0,0,0,124,28,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,48,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,48,0,3,0,0,48,1,128,24,0,0,0,0;
DB 0,0,0,96,0,115,1,158,48,97,176,27,48,0,0,0;
DB 0,0,0,96,3,195,0,246,48,49,152,49,176,0,0,0;
DB 0,0,0,254,0,3,224,103,176,1,128,49,176,0,0,0;
DB 0,0,1,134,0,127,102,127,176,1,240,108,48,0,0,0;
DB 0,0,1,134,7,195,99,127,176,239,128,118,96,0,0,0;
DB 0,0,1,246,0,195,96,127,179,225,128,243,96,0,0,0;
DB 0,0,1,134,1,182,96,255,176,99,193,177,224,0,0,0;
DB 0,0,1,134,3,118,97,255,176,110,192,48,192,0,0,0;
DB 0,0,1,246,3,252,193,156,48,102,96,49,224,0,0,0;
DB 0,0,1,134,0,24,195,54,48,119,236,51,56,0,0,0;
DB 0,0,1,254,0,51,192,102,112,124,60,62,30,0,0,0;
DB 0,0,1,206,0,97,128,192,48,0,28,48,0,0,0,0;
DB 0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 7,156,243,224,12,32,15,128,0,0,0,0,13,136,0,192;
DB 8,136,74,64,18,96,10,128,0,0,0,0,5,24,1,32;
DB 8,8,72,143,130,35,226,0,0,0,0,0,5,8,1,32;
DB 8,8,72,128,12,32,2,0,0,0,0,0,5,8,1,32;
DB 8,8,73,0,2,32,2,0,0,0,0,0,5,8,1,32;
DB 8,136,73,32,18,32,2,0,0,0,0,0,2,8,1,32;
DB 7,8,243,224,12,112,7,0,0,0,0,0,2,28,64,192;
DB 0,48,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
/* (128 X 64 )*
TAB2:
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,24,0,0,0,0,0,0,0,0,0,0,192,0,0;
DB 0,0,28,0,0,0,0,0,1,192,56,0,48,112,0,0;
DB 0,0,28,0,0,222,0,0,1,192,24,0,48,96,0,0;
DB 0,0,62,0,0,254,3,128,1,192,24,0,112,96,0,0;
DB 0,0,119,0,0,206,31,192,3,224,24,0,112,96,0,0;
DB 0,0,115,128,0,207,249,128,3,123,24,0,224,126,0,0;
DB 0,0,225,192,0,206,219,128,7,61,152,0,195,240,0,0;
DB 0,1,192,224,0,254,219,128,14,13,152,1,192,96,0,0;
DB 0,3,128,112,0,254,219,0,12,1,152,3,192,96,0,0;
DB 0,3,15,252,0,206,223,128,24,225,152,3,192,127,128,0;
DB 0,6,126,63,128,206,240,0,63,241,152,6,195,240,0,0;
DB 0,12,0,31,192,254,192,0,110,97,152,12,206,224,0,0;
DB 0,56,0,0,0,238,192,0,198,97,152,24,192,96,0,0;
DB 0,96,1,128,1,204,192,24,7,225,152,0,192,96,0,0;
DB 0,0,31,192,1,140,192,24,6,225,152,0,192,252,0,0;
DB 0,3,241,224,1,140,192,56,6,192,24,0,195,224,0,0;
DB 0,1,129,192,3,140,224,120,6,12,24,0,192,96,0,0;
DB 0,1,193,128,3,60,127,248,6,28,24,0,192,96,0,0;
DB 0,0,193,128,6,28,31,192,7,252,24,0,192,127,192,0;
DB 0,0,255,128,6,28,0,0,1,240,248,1,255,240,0,0;
DB 0,0,224,0,0,24,0,0,0,0,120,0,192,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,56,0,192,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,128,0,0,0,0,0,0,0,0,0,0,0,0;
DB 1,0,0,128,0,0,0,0,0,128,0,0,0,0,0,0;
DB 1,0,1,224,3,0,7,240,1,128,0,240,3,0,0,248;
DB 25,112,7,192,3,0,5,80,1,248,61,160,1,128,7,16;
DB 24,192,7,0,3,224,7,96,31,0,41,32,4,192,0,16;
DB 0,96,2,128,31,48,1,120,18,224,41,160,12,96,3,144;
DB 17,128,7,224,23,176,15,192,3,32,41,96,9,48,28,16;
DB 48,224,7,128,23,32,2,96,6,160,57,216,19,24,7,144;
DB 39,160,0,248,15,160,4,48,11,32,41,224,54,28,25,144;
DB 36,36,31,128,15,224,15,252,50,160,34,96,69,198,15,16;
DB 40,36,32,128,3,2,53,167,3,32,34,16,15,32,14,16;
DB 24,38,0,128,1,6,6,96,2,32,34,78,31,96,0,16;
DB 0,54,0,128,0,254,0,0,2,32,35,130,0,0,0,112;
DB 0,14,0,128,0,0,0,0,0,96,0,0,0,0,0,16;
DB 0,0,0,128,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;
DB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;"
汇编语言显得有些复杂，感兴趣的小伙伴也可以用C语言试一下哦！
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