Output current balanced display data acquisition device of battery packs of bridge-type circuit

Abstract

An output current balanced display data acquisition device of battery packs of a bridge-type circuit comprises balancing resistors (11), ammeters (12), voltmeters (13), a power management system (BMS)(15) and a relay coil, wherein a positive current output wire (18) of each battery pack is divided into two paths, one path is used for connecting a normally-open contact in series to an output, theother path is connected in series normally-closed contact (16) and is connected with a front end of each balancing resistor (11) of the bridge-type circuit, in the bridge-type circuit, the eight balancing resistors (11) are connected in series in an end-to-end way to form an outer ring, and each balancing resistor (11) is simultaneously connected in series with one of the ammeters (12) and one ofthe voltmeters (13) so as to form an inner ring. By the output current balanced display data acquisition device, slight current difference among the four battery packs can be accurately measured; andthe bridge circuit and an output circuit are partitioned by the normally-open contact and the normally-closed contact, so that a dynamic output and a static output of the whole circuit are separated,the demand of the battery packs working for a long time is satisfied, and the output current balanced display data acquisition device has wide application prospect and market prospect.

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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