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Battery management system and BMU self-calibration method

A battery management system and battery cell technology, applied in battery/fuel cell control devices, electric vehicles, electric traction, etc., can solve the problems of complex design, adding hardware circuits, and error-prone BMU installation, so as to improve production efficiency, The effect of reducing installation errors and increasing the difficulty of hardware design

Active Publication Date: 2016-10-12
JASMIN INT AUTO RES ANDDEV BEIJING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the defects in the prior art, the present invention provides a battery management system and a BMU unit self-calibration method to solve the problems in the prior art that BMU installation is prone to errors or the design is complicated due to the addition of hardware circuits

Method used

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  • Battery management system and BMU self-calibration method
  • Battery management system and BMU self-calibration method

Examples

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Embodiment 1

[0032] The invention provides a battery management system, such as figure 1 As shown, it includes: a battery main control unit BCU, a plurality of battery unit monitoring units BMU, coded signal lines and a BMU controller (not shown in the figure). The BCU communicates with multiple battery cell monitoring units BMU, and the BMU controller is connected to multiple battery cell monitoring unit BMUs through coded signal lines; the BMU controller is used to generate a unique code and send it to the corresponding BMU; each BMU is used to The query request of BCU obtains its own unique code and feeds it back to BCU.

[0033] It should be noted that the number of BMUs in the embodiment of the present invention is determined by the number of batteries. According to the number of battery cells that each BMU can monitor, the number of BMUs is obtained. For example, there are 200 battery cells in total, and the number of batteries that can be monitored by each BMU is 15, then the numb...

Embodiment 2

[0045] The present invention provides a battery management system. The difference from Embodiment 1 is that the embodiment of the present invention does not require a BMU controller, and the wires of each BMU controller can be grounded or connected to a high level according to the coding rules (this application is suspended in the middle), then figure 1 The encoding method of the 4 BMUs shown is:

[0046] The only code of BMU1 is: suspended / suspended / suspended / suspended; the only code of BMU2 is: grounded / suspended / suspended / suspended; the only code of BMU3 is: suspended / grounded / suspended / suspended; the only code of BMU4 is: suspended / floating / grounded / floating.

[0047] In this embodiment, after the BMU is installed, the coded signal line is grounded or suspended, so that the BMU can have a unique identification code. The BMU can inquire and identify the combined state of the coded signal lines according to the inquiry request of the BCU to obtain a unique identification ...

Embodiment 3

[0049] The embodiment of the present invention also provides a battery management system BMU unit self-calibration method, the battery management system includes a battery main control unit BCU, a plurality of battery unit monitoring units BMU, coded signal lines and a BMU controller, such as figure 2 As shown, the method includes:

[0050] S1. The BCU sends a request to any BMU to inquire about the unique code of the BMU;

[0051] S2. The BMU inquires the combined state of the coded signal lines to obtain the corresponding unique code, and feeds it back to the BCU for the BCU to communicate with the BMU according to the unique code.

[0052] Such as image 3 As shown, the BCU asks the BMU for the unique code (that is, the location information), and the BMU obtains the unique code according to the high and low levels of the coded signal line, and then judges whether the unique code is valid. When the unique code is valid, it is sent to the BCU through the CAN bus. When the...

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Abstract

The invention relates to a battery management system and a BMU self-calibration method. The system comprises a battery main control unit (BCU), multiple battery monomer monitoring units (BMU), coding signal lines and a BMU controller; the BCU is in communication connection with the battery monomer monitoring units (BMU), and the BMU controller is connected with the battery monomer monitoring units (BMU) through the coding signal lines; the BMU controller is used for generating unique codes to send the unique codes to the corresponding BMUs; the BMUs are used for acquiring the unique codes of the BMUs according to a query request of the BCU and feeding the unique codes back to the BCU. The BMU self-calibration method is achieved on the basis of the battery management system. Accordingly, the hardware design difficulty cannot be increased, fixed-site installation is not needed, and the production efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of battery management, in particular to a battery management system and a BMU unit self-calibration method. Background technique [0002] In the environment of environmental pollution and shortage of fossil energy, electric vehicles with the advantages of non-pollution have been rapidly developed. Electric vehicles are driven by battery packs, which usually consist of dozens or even hundreds of batteries. In order to realize unified management of battery packs, electric vehicles are usually equipped with a battery management system. The battery management system includes a battery main control unit (BCU), a battery cell monitoring unit (BMU) and an insulation monitoring unit (HVU). [0003] In practical applications, each BMU can monitor 12 to 30 battery cells at the same time. Therefore, when there are dozens or even hundreds of battery cells, several or even a dozen BMUs are needed. When the BCU communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L58/10Y02T10/70
Inventor 陈言平张毅鲁振辉王少鹏王史伟赵鑫龙
Owner JASMIN INT AUTO RES ANDDEV BEIJING CO LTD
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