The embodiment of the invention provides a charging method of a battery and electric equipment, and the charging method provided by the embodiment of the invention can eliminate polarization caused by large-current fast charging and improve interface lithium precipitation under the condition of slightly increasing the charging time by carrying out large-current and small-current alternate charging and discharging circulation in a fast charging circulation process, so that the charging efficiency of the battery is improved, and the service life of the battery is prolonged. The abnormal diving phenomenon of the battery cell is prevented, and the interface SOC regional difference caused by fast charging is balanced; in addition, low-current charging can reduce the temperature rise difference of the battery core, reduce the regional over-charge and over-discharge phenomena, improve the lithium precipitation and prolong the available life of the battery, so that the problem that the lithium precipitation of the negative electrode of the lithium battery cannot be improved on the premise of ensuring the fast charging performance in the existing charging mode is solved.
本发明实施例提供了一种电池的充电方法及用电设备,其中,本发明实施例所提供的充电方法,通过在快充循环过程中进行大小电流交替充放电循环,可以在少量增加充电时长的情况下,消除大电流快充引起的极化,改善界面析锂,防止电芯异常跳水现象,均衡快充引起的界面SOC区域性差异;另外,小电流充电可以降低电芯温升差异,降低区域性过充过放现象,改善析锂同时也可以提升电池的可利用寿命,因而解决了现有充电方式无法在保证快充性能的前提下,改善锂电池负极析锂的问题。
Battery charging and power utilization equipment
一种电池的充电及用电设备
2023-11-17
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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