Series battery pack management and control method based on automatic battery switching control system

Abstract

The invention discloses a series battery pack management and control method based on an automatic battery switching control system. The system comprises a switching control unit, a battery access unit, a standby battery access unit, a voltage detection unit, a temperature detection unit, wherein the battery access unit consists of a plurality of basic battery access nodes which are connected in series, the standby battery access unit is composed of a plurality of standby battery access nodes which are connected in series, the voltage detection unit is used for detecting a voltage of a single battery accessed to each battery access node, the temperature detection unit is used for detecting the temperature of a single battery accessed to each battery access node, when one or more batteries in the battery pack are abnormal, faulty batteries can be immediately removed from the battery pack, the standby batteries are connected into the battery pack, and the switching process can be carriedout online in the discharging or charging process of the battery pack without stopping charging and discharging. The control system is advantaged in that the control system provided by the invention can be widely applied to the battery pack, effectively guarantees use safety of the battery, enhances redundancy capability, and prevents the condition that the whole battery pack cannot be used due tofailure of a single battery.

Description

technical field [0001] The invention relates to the field of protection and control of battery packs in the field of control circuits, in particular to a method for managing and controlling series-connected battery packs based on a battery automatic switching control system. Background technique [0002] The battery pack will encounter the abnormality of a single battery in daily use, especially the lithium battery pack is sensitive to the battery voltage and temperature, the safety of a single battery is particularly important, the traditional battery protection method is to use the BMS battery management system, BMS monitoring circuit Usually an input is provided to the protection device. If any parameter exceeds the set limit, the protection device will generate an alarm or disconnect the battery from the load or charger. Although the battery in it is protected, the entire battery pack will not be used normally. , thus bringing unnecessary troubles to users, and sometimes...

AI Technical Summary

Problems solved by technology

[0002] The battery pack will encounter the abnormality of a single battery in daily use, especially the lithium battery pack is sensitive to the battery voltage and temperature, the safety of a single battery is particularly important, the traditional battery protection method is to use the BMS battery management system, BMS monitoring circuit Usually an input is provided to the protection device. If any parameter exceeds the set limit, the protection device will generate an alarm or disconnect the battery from the load or charger. Although the battery in it is protected, the entire battery pack will not be used normally. , thus bringing unnecessary troubles to users, and sometimes even causing heavy losses

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