A method for indicating low power of lithium-ion batteries belongs to the technical field of lithium-ion batteries, especially for lithium/imide chloride batteries. The steps include: firstly, testing the discharge current I of lithium-ion batteries, periodically applying pulses to lithium-ion batteries, recording the voltage Uf and Ul before and after pulse charging, then calculating the DC internal resistance Ri according to Ri=(Uf_Ul)/I; secondly, calculating the DC internal resistance Ri according to discharge current I and discharge. The discharge capacity is calculated by the product of time t, and the current consumption of the battery is obtained. At the same time, the actual maximum discharge capacity of the battery is counted and analyzed at different discharge current and temperature. The current consumption of the battery is the discharge depth of the battery compared with the actual maximum discharge capacity of the battery. Finally, the relationship between the DC internal resistance and the discharge depth of the battery is plotted, and the Ri of the DC internal resistance is found. The sudden change point of discharge depth can give a hint to low electric quantity. This method is simple, practical and easy to operate without strict modeling. It is especially suitable for lithium/thionyl chloride primary batteries with low power consumption.
【技术实现步骤摘要】
一种锂原电池低电量的提示方法
一种锂原电池低电量的提示方法,属于锂电池
,具体涉及一种锂原电池低电量的提示方法,尤其是涉及对锂/亚酰氯电池的低电量提示方法。
技术介绍
许多电子产品依赖电池提供工作所需的能量,随着电子工业的发展,众多电子产品对电池的需求越来越多,要求也越来越高。对于用户来说,电池剩余容量预测相当重要,锂电池若一直使用下去会产生“过放”,而锂电池在“过放”时会使电池泄气、漏液,甚至爆炸,造成一定的损害,所以电池剩余容量预测直接关系到用电器的安全性和可靠性,必须及时、准确地了解电池的运行状态,对电池进行合理有效的管理和控制,在低电量时对用户进行提示。锂一次电池由于没有充电过程,放电曲线非常平稳,直到电量耗尽时,电压才会明显下降。因此它缺乏像锂二次电池那样简单易行的估算剩余容量的方法,低电量提示存在一定难度。电池低电量提示目前主要通过剩余容量预测实现,一般来说电池剩余容量常用电池荷电状态(Stateofcharge,以下简称SOC)来表示。SOC的精确估算是电池能量管理系统中最核心的技术。电池的SOC无法用一种传感器直接测得,必须通过对一些其他物理 ...
【技术保护点】
1.一种锂原电池低电量的提示方法,其特征在于包括以下步骤:a、测定锂原电池的放电电流I,多次测量求平均值
【技术特征摘要】
1.一种锂原电池低电量的提示方法,其特征在于包括以下步骤:a、测定锂原电池的放电电流I,多次测量求平均值并对放电过程中的锂原电池定期施加脉冲,记录施加脉冲前后的电压Uf和Ul,根据Ri=(Uf-Ul)/I计算出电池直流内阻Ri;b、从新的锂原电池始用时即计量放电时间t,根据放电电流平均值I和放电时间t之积计算电池当前消耗电量Cu;c、获取相同锂原电池的实际最大放电容量Ca,则...
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