System and method for realizing automatic failure compensation for power battery

Abstract

The invention discloses a system for realizing automatic failure compensation for a power battery and realizes automatic compensation on an invalid unit of the power battery. The system comprises a battery module pack and a battery module control unit; the battery module pack comprises multiple battery units connected in series or in parallel, each battery unit comprises a first branch circuit, a second branch circuit and a switch control module, and each first branch circuit comprises a battery module; the battery module control unit is used for marking the battery units as working battery units or reserved battery units, and detecting the working state of one working battery unit and judging that the current working battery unit is invalid or not, if so, the invalid working battery unit is marked as an invalid battery unit, and any of the reserved battery unit as the working battery unit; a control instruction is transmitted to the working battery unit, the second branch circuit of the working battery unit is enabled to be switched off, and the first branch circuit of the working battery unit is enabled to be switched on; a control instruction is transmitted to a reserved battery unit, the first branch circuit of the reserved battery unit is enabled to be switched off, and the second branch circuit of the reserved battery unit is enabled to be switched on; and a control instruction is transmitted to the invalid battery unit, the first branch circuit of the invalid battery unit is enabled to be switched off, and the second branch circuit of the invalid battery unit is enabled to be switched on. The invention also discloses a method for realizing automatic failure compensation for the power battery.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a system and method for realizing automatic failure compensation of power batteries. Background technique [0002] Traditional vehicles use petroleum as fuel as the power source, while new energy vehicles mostly use electricity as the main or auxiliary power source. Because new energy vehicles have less impact on the environment than traditional vehicles, their prospects are widely optimistic. At present, the main components of new energy vehicles to store electric energy are power batteries. In the existing technology, power batteries can be divided into three parts in structure: battery cells, battery modules and battery modules. Battery cells are the most basic work. The battery module is composed of several battery cells connected in series to form a series sequence of cells, and then composed of several cells connected in series in parallel; the battery module is...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the main purpose of the present invention is to provide a system and method for automatic power battery failure compensation, which solves the problem of early failure of some battery modules in the battery modules in the prior art, which leads to the performance degradation of the power battery system, and further Issues that affect vehicle operation and reliability, and increase user costs

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