A battery pack output current balance display device

Abstract

The invention relates to a display device of balancing of output current of a battery pack, and belongs to the technical field of battery management. The display device comprises a batter bag box body, a battery bag box body top plate, a battery bag box body ventilation base, a battery bag lower end cover, a battery bag box body base plate, single-body cells, a battery pack sleeve, a battery pack upper cover, a battery pack positive electrode current output conductive wire and a current balancing test device. According to the invention, current output conditions of the battery consisting of serially connected single-body cells and temperature state of the unit battery can be directly judged; single-body cells of the battery bag can be freely changed; subtle current difference between multiple battery packs can be precisely measured; current balancing data and temperature state data of the battery pack can be transmitted to a power supply management hardware system; reliable data is provided for current and heat management and optimization of the battery bag; through the sleeve-type structure, health states of the whole battery bag are prevented from being affected by faults of a single cell; demands on long-term work of the battery pack are met; and the display device has wide application and market prospects.

Description

technical field [0001] The invention relates to a battery pack output current balance display device, which belongs to the technical field of battery management. Background technique [0002] Electric vehicle battery management system (BMS) is an important device to improve the performance of vehicle power batteries. Its main functions include: real-time monitoring of battery physical parameters; battery state estimation; online diagnosis and early warning; charge, discharge and pre-charge control; management etc. [0003] 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 re...

AI Technical Summary

Problems solved by technology

Therefore, the current balance of the battery is extremely important. Currently, in the battery current balance management, the current balance is monitored through the power management system, the current balance data is collected, and the current of the battery pack is compensated. However, in the work of the battery, the use of a large number of ammeters will Increase the volume of the battery box, and it is impossible to intuitively judge whether the current of the battery pack is balanced. How to intuitively judge the balance state of the battery pack, reduce the cost, reduce the volume, and directly collect the data of the current balance difference is not yet feasible. technology, this problem needs to be solved urgently

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