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为什么磷酸铁锂电池电压存在压差?

2022-06-20

为(wei)什么磷酸铁锂(li)电池电压存在压差?

关(guan)(guan)于很(hen)多网友和(he)用户(hu)关(guan)(guan)心的(de)磷(lin)酸(suan)铁锂电池压差问(wen)题,山木新能源给(ji)大家讲解下(xia)其(qi)中(zhong)的(de)原(yuan)因和(he)在实(shi)际应(ying)用中(zhong)的(de)影响。

磷(lin)酸(suan)铁(tie)锂(li)电(dian)池充(chong)放电(dian)平台是(shi)(shi)(shi)(shi)有压(ya)(ya)差是(shi)(shi)(shi)(shi)正常(chang)的,虽然耐过充(chong),但是(shi)(shi)(shi)(shi)充(chong)到更高(gao)电(dian)压(ya)(ya)还是(shi)(shi)(shi)(shi)会损伤电(dian)池。原因是(shi)(shi)(shi)(shi)磷(lin)酸(suan)铁(tie)锂(li)电(dian)池,是(shi)(shi)(shi)(shi)一种使用磷(lin)酸(suan)铁(tie)锂(li)(LiFePO4)作为正极材料,碳作为负极材料的锂离子电池,单体额定电压为3.2V,充电截止电压为3.6V~3.65V。


电(dian)池结构特点:

磷(lin)酸铁锂电池左边是橄(gan)榄石结构的LiFePO4材料构成的正极,由铝箔与电池正极连接。右边是由碳(石墨)组成的电池负极,由铜箔与电池的负极连接。中间是聚合物的隔膜,它把正极与负极隔开,锂离子可以通过隔膜而电子不能通过隔膜。电池内部充有电解质,电池由金属外壳密闭封装。

电池(chi)充放电原(yuan)理(li):

磷酸铁锂电池的(de)充放电反应是(shi)在LiFePO4和FePO4两相之间进行。在充电过程中,LiFePO4逐渐脱离出锂离子形成FePO4,在放电过程中,锂离子嵌入FePO4形成LiFePO4。

深圳市山(shan)木新(xin)(xin)能源(yuan)作为(wei)国内锂电(dian)池(chi)老牌(pai)厂(chang)家,在(zai)磷酸铁锂电(dian)压压差控制(zhi)和管理上有这(zhei)丰富的(de)经验,虽然(ran)压差是不(bu)可(ke)避免(mian)的(de)存在(zai),但是山(shan)木新(xin)(xin)能源(yuan)已经实现将压差控制(zhi)在(zai)合理的(de)范(fan)围内。特别是在(zai)大(da)型储能以(yi)及动力锂电(dian)池(chi)组上,充(chong)(chong)放电(dian)管理系统得到了充(chong)(chong)分的(de)应(ying)用。取的(de)不(bu)错(cuo)的(de)效果(guo)。


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