A power battery automatic balancing system device

Abstract

The gist of the technical solution of the present invention is: a power battery automatic balancing system device, the positive and negative poles of a battery pack composed of a plurality of serially connected single batteries are respectively connected to the single battery slave control unit module; The positive and negative poles of each battery are connected to the corresponding battery balancing unit module through the line, and the adjacent battery balancing unit module is connected to the same control relay through the line. One port of the control relay is connected to the slave control unit module through the line, and the other port of the control relay The port is connected to the control switch through the line and then connected to the slave control unit module; the slave control unit module is connected to the master control unit module through the communication line, and the master control unit module is connected to the display and the input device through the wire. The invention can prevent the entire system from being affected when the pressure difference in the battery system is greater than the preset threshold due to internal reasons or external problems during the long-term operation of the vehicle, and perform timely balanced maintenance on the batteries in the problem box.

Description

technical field [0001] The invention relates to a power battery, in particular to a power battery automatic balancing system device. Background technique [0002] At present, various types of electric vehicles have become an important means of transportation for reducing air pollution, energy saving and emission reduction. Governments and related companies of various countries have invested huge sums of money and efforts to promote the development of electric vehicles. Among them, power batteries are a clean and environmentally friendly power source. The development of power battery technology directly affects the promotion and application of electric vehicles. At the same time, power batteries such as lithium iron phosphate, ternary batteries, lithium titanate, lithium manganate, and multi-element composite lithium have become the mainstream of applications. However, with the continuous increase in the application of power batteries in the market and the extension of opera...

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Problems solved by technology

[0003] In this case, in order to solve the performance and service life of all batteries in the power battery system, it is necessary to balance the batteries with poor consistency in different states in a certain way, which becomes a necessary maintenance measure At the same time, the maintenance process also needs to further solve the convenience of battery maintenance. At this stage, the main method is to perform passive equalization through the equalizer after parking or through the battery management system. However, when the pressure difference is too large, it cannot be carried out through the above solutions. Using other schemes, the main invention is to actively balance the charge and discharge of the battery through the battery equalization unit, slave control unit, and master control unit. At present, it is still in the exploratory stage at home and abroad.

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