Protection system for multiple strings of batteries

Abstract

The invention relates to a protection system for multiple strings of batteries, which comprises a collection module used for collecting the battery cell voltage, the charging and discharging current in the battery cell charging and discharging process and the battery cell temperature in the battery cell charging and discharging process, a main control module coupled to the collection module and used for receiving a voltage detection signal, a current detection signal and a temperature detection signal, and a communication module coupled to the main control module and an external charging and discharging device and used for identifying and managing the number of charging and discharging times. According to the invention, the charging and discharging processes of multiple strings of batteries are monitored, and the service life of the multiple strings of batteries is prolonged.

Description

technical field [0001] The invention relates to the technical field of battery protection, in particular to a multi-string battery protection system. Background technique [0002] At present, with the development and popularization of some portable digital devices, electric tools, electric vehicles, mobile power sources and distributed energy sources, batteries have received more and more attention. Under the condition that single cells or single module batteries have certain specifications, in order to meet different usage occasions and application requirements, it is often necessary to connect single cells in series and parallel to form a battery pack. When overcurrent or even short circuit occurs in a multi-cell battery pack system, it may cause battery charge and discharge safety issues. [0003] The existing multi-string batteries cannot withstand overcharge and over-discharge, and when the number of batteries in series and parallel is large, new problems such as batte...

AI Technical Summary

Problems solved by technology

When the multi-cell battery system is over-current or even short-circuited, it may cause battery charging and discharging safety problems

[0003] The existing multi-string batteries cannot withstand overcharge and over-discharge, and when the number of batteries in series and parallel is large, new problems such as battery imbalance will appear, and the battery pack must be balanced

Battery performance changes significantly with temperature. At low temperature, the reaction rate of the electrode decreases, and the ability of the battery pack to absorb and output power will decrease. At high temperature, the chemical reaction of the battery accelerates, the electrolyte evaporates quickly, and the plate is easily damaged, which seriously affects the service life of the battery.

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