System and method for diagnosing and maintaining energy storage battery packs

Abstract

The invention discloses a system and a method for diagnosing and maintaining energy storage battery packs. The system comprises an energy storage battery pack module, a BMU (battery management unit) module, a master control module and a maintenance module. A plurality of single batteries are serially connected with one another to form the energy storage battery pack module; the BMU module is used for acquiring total voltages of the energy storage battery pack module, single voltages of the various single batteries, main circuit currents and battery temperatures and transmitting single voltage, main circuit current and battery temperature information to the master control module; the master control module is used for receiving the single voltage, main circuit current and battery temperature information and screening the single batteries according to the single voltage, main circuit current and battery temperature information, and screened single batteries include qualified batteries and unqualified batteries; the maintenance module is used for receiving unqualified battery information transmitted by the master control module, maintaining the unqualified batteries and transmitting maintenance information to the master control module in a return manner. The system and the method have the advantages that whether requirements of energy storage systems can be met by current performance of the batteries or not can be discriminated according to power characteristics of the batteries, alarm can be sent for the unqualified batteries, and the qualified batteries need to be timely charged and maintained.

Description

technical field [0001] The invention relates to the technical field of electric vehicle batteries, in particular to an energy storage battery pack diagnosis and maintenance system and method. Background technique [0002] Large-scale battery energy storage is widely used in electric power, backup power and electric vehicles, and hundreds of batteries are often used in series. After years of development, some batteries are in service, and some batteries have already faced or have been returned. Whether it is an in-service battery or a returned battery, there is a phenomenon that the battery is idle and lacks effective management. [0003] When the battery management system failure causes the battery to overcharge, overdischarge, etc., or the battery itself due to accidents such as short circuit, thermal runaway, or long-term idle batteries without effective management, the battery will appear low voltage. Although there is a management system, the management system can only...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the situation that in the prior art, some batteries connected in series with energy storage batteries will face or have been returned after long-term use, and the existing battery management system cannot be maintained in time or the maintenance effect is poor. Disadvantages, provide an energy storage battery pack diagnosis and maintenance system and method

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