Battery pack structure reconstruction device and method

Abstract

The invention relates to a battery pack structure reconstruction device and method. The battery pack structure reconstruction device comprises a main control module, N single battery modules and N single batteries, wherein the main control module is connected with the N single battery modules through a communication bus; the battery connecting terminal of each single battery module is connected with the negative electrode and the positive electrode of one single battery separately; the main control module queries the usage amount of the N single battery modules through the communication bus separately; and a direct current power output system of the main control module outputs direct current which satisfies requirements through output terminals -and +. According to the battery pack reconstitution method disclosed by the invention, the structure is simpler, the battery modules which can be independently installed can be directly attached to the single storage batteries to form the intelligent battery units, and the intelligent battery units are further assembled into the intelligent battery pack; the equipment is convenient and feasible to install and maintain, the batteries of different types and specifications can be mixed and used in a series mode, and the battery pack reconstruction method is suitable for a high-electric-quantity battery pack management system.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery pack structure reconfiguration device and method. Background technique [0002] As an effective means to prolong battery life, the battery management system (BMS), which plays an important role in the battery system, has gradually attracted everyone's attention. Among them, the BMS equalization system, which plays a key role, has also attracted widespread attention. At present, there are two ways of balancing multi-series battery systems on the market: traditional passive balancing and active balancing. [0003] Passive equalization generally discharges the battery with higher voltage through resistance discharge, releases the charge in the form of heat, and buys more charging time for other batteries. In this way, the charge capacity of the entire system is limited by the battery with the least charge capacity. During the charging process, lithium batterie...

AI Technical Summary

Problems solved by technology

This invention patent has the following limitations: (1) The output voltage, current, and charge of the energy storage unit are required to be consistent according to the application, and the faulty energy storage element must be replaced with a spare energy storage element of the same specification; (2) the energy storage unit The device bus structure limits that only one backup energy storage element can be provided. When two or more energy storage elements fail, the energy storage device cannot work normally; (3) Each energy storage element and backup energy storage element is equipped with two The single-pole double-throw switch is associated with four busbars, and the structure is complex (4) This invention does not help to balance the charge of the battery pack

The limitation of this invention is that the number of switching devices required is too large. When m=10 and n=10, 6039 switching devices are needed, and the specific design, implementation, installation and maintenance are very difficult.

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