A bridge circuit battery pack output current balance display data acquisition device

Abstract

The present invention is composed of balance resistor (11), ammeter (12), voltmeter (13), power supply management BMS (15), relay coil (17); the battery pack positive electrode current output conducting wire (18) is divided into two circuits, One path connects the normally open contact (14) to the output in series, and the other path connects the normally closed contact (16) in series with the front end of the balance resistor (11) of the bridge circuit; the bridge circuit consists of eight balance resistors (11). Each balance resistor (11) is connected in series with an ammeter (12) and a voltmeter (13) at the same time to form an inner ring; the present invention can accurately measure the subtle current differences between the four battery packs ;The bridge circuit and the output circuit are separated by the normally open contact and the normally closed contact, so that the dynamic output of the entire circuit is separated from the static measurement; it meets the needs of the battery pack for a long time, and has broad application prospects and market prospects.

Description

technical field [0001] The invention relates to a bridge circuit battery group output current balance display data acquisition device, which belongs to the technical field of battery management. Background technique [0002] During the charging and discharging process of the battery, the terminal voltage and temperature of each battery in the electric vehicle storage (should be a power battery pack), the charging and discharging current and the total voltage of the battery pack are collected in real time to prevent the battery from being overcharged or overdischarged. . At the same time, it can give the battery status in time, select the battery with problems, maintain the reliability and high efficiency of the whole battery operation, and make it possible to realize the remaining power estimation model. In addition, it is necessary to establish the use history file of each battery to provide data for further optimization and development of new batteries, chargers, motors, ...

AI Technical Summary

Problems solved by technology

The quality of lithium batteries is not easy to grasp during mass production. There are slight differences in the power of battery cells when they leave the factory. With the operating environment, aging and other factors, the inconsistency between batteries will become more and more obvious, and battery efficiency and life will also deteriorate. Overcharge or overdischarge, etc., may lead to safety problems such as fire and combustion in severe cases

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