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Battery management system and method

A battery management system and battery management technology, applied in the automotive field, can solve problems such as different current consumption of battery modules and voltage differences of battery cells, so as to improve robustness and safety, improve voltage differences, and improve reliability Effect

Active Publication Date: 2020-10-16
UNITED AUTOMOTIVE ELECTRONICS SYST
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AI Technical Summary

Problems solved by technology

In the traditional one-way daisy chain communication structure, nodes in different positions need to be relayed differently. Since the relay mode requires current consumption, it will cause different current consumption to the battery module, which eventually leads to a decrease in the voltage of the battery cell. difference

Method used

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  • Battery management system and method

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Embodiment Construction

[0028] The battery management system and method proposed by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structure. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0029] As mentioned above, in the traditional one-way daisy chain communication structure, nodes at different positions need to be relayed differently. Since the relay mode requires current consumption, it will cause different current consumption to the battery module, which e...

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Abstract

The invention provides a battery management system and a method. A central control unit is connected with a head battery management chip and a tail battery management chip through analysis chips; therefore, the central control unit can communicate with the battery management chips from the head direction and the tail direction in a normal state; compared with a one-way daisy chain communication system, the voltage difference, caused by communication power consumption, between single batteries and battery modules is greatly improved, meanwhile, data obtained from two directions can be mutuallyverified, and the reliability of the data is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a battery management system and method. Background technique [0002] With the rapid development of new energy electric vehicle technology, battery management system (Battery Management System, BMS) is playing an increasingly important role as one of the core technologies. [0003] At present, the battery management system on the market is mainly a master-slave structure, and the internal communication mode of the master-slave structure battery management system mainly adopts CAN communication mode or daisy chain communication mode. The reliability of CAN communication is high, but isolation design is usually required, so its cost is high. The cost of daisy chain communication is relatively low, and it is being used more and more at present. Since the daisy chain communication structure adopts a cascading method, once the traditional one-way daisy chain fails or the communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/10
CPCB60L58/10Y02T10/70Y02T90/16
Inventor 宋中奇杨益华郭孟强陈闽杰
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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