The invention discloses a battery series charging circuit which comprises a starting switch, a loop control circuit, a voltage-to-current circuit and a current bypass circuit. The starting switch is connected to the positive and negative electrodes of the lithium battery; the starting switch is respectively connected with the loop control circuit, the voltage-to-current circuit and the current bypass circuit; a sampling circuit, a differencing circuit, a compensating circuit and an amplifying circuit are arranged in the loop control circuit; the sampling circuit is used for collecting the voltage of the lithium battery to obtain a sampling voltage, and the differencing circuit compares the sampling voltage with a built-in voltage so as to control the conduction degree of the differencing circuit; the output end of the differencing circuit is connected with the compensating circuit; the amplifying circuit is connected with the output end of the compensating circuit; the voltage-to-current circuit converts the voltage control quantity into control current; and the current bypass circuit adjusts the charging current of the lithium battery according to the control current. The charging equalization of the lithium battery can be realized, and the service life of the battery can be effectively prolonged.
本发明公开了一种电池串联充电电路,包括启动开关、环路控制电路、电压转电流电路和电流旁路电路;所述启动开关连接在锂电池的正负极;所述启动开关分别与环路控制电路、电压转电流电路和电流旁路电路连接;所述环路控制电路中设有采样电路、求差电路、补偿电路和放大电路;所述采样电路用于采集锂电池电压获得采样电压,所述求差电路将采样电压与其内置电压比较进而控制求差电路的导通程度;所述求差电路的输出端与补偿电路连接;所述放大电路与补偿电路的输出端连接;所述电压转电流电路将所述电压控制量转换为控制电流;所述电流旁路电路根据控制电流调节锂电池充电电流。本发明可以实现锂电池的充电均衡,能够有效的提升电池的使用寿命。
Battery series charging circuit
一种电池串联充电电路
2023-06-23
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |