Lithium battery capacity enhanced balance maintenance method

A lithium battery and charging equalization technology, which is applied to battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as uneven calculation accuracy and balance judgment errors, achieve rapid recovery, solve balance judgment errors, and solve battery balance effects Effect

Pending Publication Date: 2022-04-08
HANGZHOU GOLD ELECTRONICS EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0004] However, at present, most battery management systems are mainly for battery voltage balance maintenance, and there are also cases where SOC is used for balance. However, due to the different calculation accuracy, when the accuracy has problems, it may lead to misjudgment of balance.

Method used

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  • Lithium battery capacity enhanced balance maintenance method
  • Lithium battery capacity enhanced balance maintenance method
  • Lithium battery capacity enhanced balance maintenance method

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Embodiment Construction

[0045] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046] A lithium battery capacity enhanced balance maintenance system includes a data input module, a basic balance judgment module, an enhanced balance judgment module, a balance channel control module and a balance protection module.

[0047] The data input module is used to input the obtained basic physical quantities of lithium batteries such as voltage, current and temperature, and the SOC and SOH calculated by the battery management system into the basic balance judgment module and the enhanced balance judgment module respectively. The basic balance judgment module is used to calculate and output the balance strategy, including the required balance battery serial number and balance cut-off condition, and input it into the balance channel control module; the enhanced balance judgment module is used to calculate and output the...

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Abstract

The invention belongs to the technical field of battery management. A lithium battery capacity enhanced equalization maintenance method comprises the following steps: obtaining basic acquisition physical quantities of a lithium battery, and calculating to obtain SOC and SOH; calculating and outputting a basic equalization strategy and an enhanced equalization strategy through the SOC and the SOH; balancing according to the serial number information of the balancing batteries in S2 and S3, and starting or stopping according to the set balancing time and the balancing cut-off condition; or balancing is stopped according to the output protection information; temperature and voltage balance protection and charge and discharge balance overprotection are carried out, and the balance operation is stopped when the balance protection is triggered. According to the method, the voltage and the calculation result are combined for joint participation, capacity equalization is used more accurately for enhancement, the battery equalization effect is better achieved, the battery consistency is better, and recovery is faster.

Description

technical field [0001] The invention belongs to the technical field of battery management, and in particular relates to a more accurate maintenance of lithium battery balance during use of a lithium battery system. Background technique [0002] The rapid development of new energy fields such as electric vehicles and energy storage power stations has enabled a large number of electrochemical batteries such as lithium-ion power batteries or lead-acid batteries to be used in electric vehicles, energy storage power stations and other environments. As a representative lithium battery, it has attracted more attention and has been applied in many fields. It has been applied on a large scale in the field of energy storage. stability and reliability. With the rapid development of new energy vehicles, lithium batteries also have very good prospects in the transportation field. [0003] Electric vehicles, energy storage power stations and other environments need to use a large number...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 王浩郑益潘红民夏晨强
Owner HANGZHOU GOLD ELECTRONICS EQUIP CO LTD
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