Method and system for reactivating charging function after serious power shortage of battery

Abstract

The invention relates to a method and a system for reactivating a charging function after serious power shortage of a battery. The battery is controlled through a BMS control system, the BMS control system supplies power through an external power supply module, an activation threshold value is set in the power supply module, and an external signal is transmitted to the power supply module by connecting external equipment; when the external signal received by the power supply module is greater than an activation threshold value, the power supply module supplies power to the BMS control system to activate the BMS control system; and the power supply module is connected with a signal processing assembly, and the signal processing assembly receives the external signal sent by external equipment, processes the external signal and then transmits the external signal to the power supply module. A minimum stress technology is adopted, a high-reliability design method of a small signal system is fully utilized, the BMS system of the battery is perfectly activated, the BMS system can be activated when the battery is in an under-voltage protection state under serious power shortage, and the battery can be recharged to be activated; and cost is low, control logic is simple and concise, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of battery control, in particular to a method and system for reactivating the charging function of a battery after severe power loss. Background technique [0002] At present, the large-capacity power battery PACK used in the market needs to be controlled by BMS control system. The state of the battery. [0003] The large-capacity power battery PACK on the market suffers from severe power loss due to long-term storage or other circumstances, which will lead to insufficient internal voltage, and is prone to the following disadvantages: [0004] ①The BMS control system cannot activate its working power system by itself due to the existence of the undervoltage protection mechanism because the battery voltage of the system is in the undervoltage protection state after the battery PACK is severely depleted, and then cannot close the charging circuit. External charging equipment Unable to charge battery PACK. ...

AI Technical Summary

Problems solved by technology

[0003] The large-capacity power battery PACK on the market suffers from severe power loss due to long-term storage or other circumstances, which will lead to insufficient internal voltage, and is prone to the following disadvantages:

[0004] ①The BMS control system cannot activate its working power system by itself due to the existence of the undervoltage protection mechanism because the battery voltage of the system is in the undervoltage protection state after the battery PACK is severely depleted, and then cannot close the charging circuit. External charging equipment Unable to charge battery PACK

[0005] ②Due to the existence of point ①, the customer or technical service personnel cannot maintain at the customer site, and the battery PACK and other related equipment are in a shutdown state at the customer site

[0006] ③Due to the reason of point ②, the equipment will only be recalled or face the risk of being scrapped

[0007] ④Due to point ③, the equipment is recalled or scrapped, which seriously wastes social public transportation resources and related material resources, causing serious waste, adding great cost and inconvenience to customers and enterprises, and reducing social benefits

[0008] ⑤The large-capacity power battery PACK cannot be activated and recharged to play its role after severe power loss, which has brought serious business risks to battery PACK manufacturers, such as a serious decline in brand power and downward customer reputation

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