Battery capacity check method for electric car matrix battery pack

Abstract

The invention relates to batteries of electric automobiles, in particular to a method for detecting battery capacity of a matrix battery pack of the electric automobiles, which is characterized by comprising the following steps: adopting a serially and parallelly connected storage battery matrix battery pack, and connecting nodes of various storage batteries in the matrix battery pack by a same resistor so as to form a balancing resistance network; sampling current signals serially connected with each row of the storage batteries in the balancing resistance network, and sampling voltage signals of other rows of nodes in each line relative to nodes in the first row; obtaining sizes and directions of all current flowing through the batteries through calculation; obtaining electric quantity conditions of all batteries in the matrix network through integration; and obtaining various capacity fading tables of the batteries in the balancing resistance network by analyzing electric quantity data of the batteries in the storage battery balancing resistance network in the charging or discharging process; therefore, the method detects and judges battery capacity fading conditions in a matrix, and replaces the batteries with quick battery capacity fading in the matrix to improve the battery capacity of the matrix storage battery pack and reduce the replacement cost of the storage batteries.

Description

technical field [0001] The invention relates to electric vehicle batteries, in particular to a battery capacity detection method for a matrix battery pack of an electric vehicle. Background technique [0002] In view of the high one-time investment cost of the existing electric vehicle battery, the short service life of the battery, and the high cost of battery replacement, the company changed the traditional concept and proposed a series-parallel battery matrix connection, and applied for the application number "200910096144.0", the name is The invention patent of "a battery wiring layout method for electric vehicles" proposes a matrix arrangement of battery packs for electric vehicles, and simultaneously performs sampling, detection and management of each single battery. However, according to the current method, it is relatively cumbersome to detect the capacity of each battery, and the battery management, replacement, and maintenance are still not flexible enough. Conte...

AI Technical Summary

Problems solved by technology

[0002] In view of the high one-time investment cost of the existing electric vehicle battery, the short service life of the battery, and the high cost of battery replacement, the company changed the traditional concept and proposed a series-parallel battery matrix connection, and applied for the application number "200910096144.0", the name is The invention patent of "a battery wiring layout method for electric vehicles" proposes a matrix arrangement of battery packs for electric vehicles, and simultaneously samples, detects and manages individual batteries

However, it is cumbersome to test the capacity of each battery according to the current method, and the battery management, replacement, and maintenance are not flexible enough.

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