Device for improving charge/discharge capability of lithium battery pack of power battery system

Abstract

The invention relates to a device for improving the charge / discharge capability of a lithium battery pack of a power battery system. According to the device, multiple cores of the lithium battery packare sequentially and vertically arranged; the device comprises an MCU, a battery heat management module, a battery consistency management module, a battery voltage collection unit, a battery temperature collection unit and a local storage unit; the battery voltage collection unit and the battery temperature collection unit are connected with each core; and the battery heat management module and the battery consistency management module are also connected with each core. Compared with the prior art, fine management on each core of the lithium battery pack is realized based on battery charge / discharge temperature characteristics, and core-level temperature and voltage can be reasonably allocated and managed; the battery heat management module simultaneously has a heating function and a heatdissipation function, so that the charge / discharge capability of the lithium battery pack under all levels of temperature is effectively enhanced; and meanwhile, the safety performance of the lithiumbattery pack is effectively improved, and the service life of the cores is prolonged.

Description

technical field [0001] The invention relates to the technical field of battery system balance management, in particular to a device for improving the charge and discharge capacity of a lithium battery pack in a power battery system. Background technique [0002] As a key component, the power battery system has been used more and more in the fields of electric vehicles and electric energy storage. The safety requirements for electric vehicles are also getting higher and higher. How to maintain the safety and reliability of the power battery system under harsh working conditions and effectively reduce the differences between the battery modules in the battery system and improve the battery charging and discharging capacity is an urgent need to solve The problem. As an important part of the power battery system, the battery module itself can better meet the market demand if it can properly adjust its own temperature and voltage consistency. [0003] In a traditional power bat...

AI Technical Summary

Problems solved by technology

Therefore, the traditional power battery system can only manage the entire power battery system level, and the temperature and balance consistency of each battery cell inside the lithium battery pack have not been considered, which will lead to temperature imbalance inside the battery pack, and the temperature difference is relatively large. Large, thus limiting the charge and discharge capacity of the power battery system

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