Power battery pack maintenance device and working method thereof

Abstract

The invention discloses a power battery pack maintenance device, which consists of a multi-core connector, a switch array, an isolating power supply module, a communication module, a control system, a charging module, a discharging module, a voltage detection circuit, a man-machine interaction module and a current sensor which are connected together. The invention additionally discloses a working method of the power battery pack maintenance device. Firstly, a battery pack is charged through a charging circuit. When the highest monomer voltage in the battery pack reaches a set value, the charging circuit is opened and the isolating power supply module is turned on to charge the voltage of monomer batteries to a set value. Then, the battery pack is discharged through the discharging module till the lowest monomer reaches a set value, the discharging module is turned off and the battery pack is charged to a set remaining power quantity state through the charging module. Finally, after the information of the battery pack is recorded, the information is transmitted to a battery pack management system through the communication module. The power battery pack maintenance device can be used in 4S storages or other fixed maintenance places to realize the performance maintenance of large-scale power battery packs.

Description

technical field [0001] The invention relates to the technical field of battery charge control, in particular to a power battery pack maintenance device and a working method thereof. Background technique [0002] With the increasing application of lithium-ion battery packs, electric vehicles, electric buses, and large-scale energy storage systems have brought tremendous changes to human society. The battery pack system is one of several key technologies that affect the widespread application of lithium-ion battery packs. There are still no perfect solutions for several problems in the battery pack system, such as the estimation accuracy of battery pack power, the estimation of battery pack life, and the balance of large-capacity battery packs. The above-mentioned battery pack problems have hindered the development of battery pack systems. wide application. The current battery pack management system has no ideal solution to these problems, so that the safety and service life...

AI Technical Summary

Problems solved by technology

However, this method has a large error in estimating the remaining power of the battery pack, especially in the later stage of the cycle. The life of the battery pack, the equilibrium state of the battery pack, and the temperature all have a great impact on the accuracy of the power estimation. There is currently no better method for the estimation accuracy of the remaining power

However, there is currently no accurate method for estimating the service life of a battery pack.

Therefore, there is no good way to solve these problems in the battery pack management system, which affects market promotion

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