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Battery system, micro short circuit fault detection method thereof and battery management system

A battery system and fault detection technology, applied in battery/fuel cell control devices, short-circuit testing, electric vehicles, etc., can solve problems such as inability to detect power battery and heating circuit micro-short-circuit faults, achieve high market application value, reduce Function development cost, simple principle effect

Active Publication Date: 2021-10-22
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a micro-short-circuit fault detection method for the battery system, which is used to solve the problem that the prior art cannot detect the micro-short circuit between the power battery and the heating circuit fault problem; a battery system is also proposed to solve the problem of micro-short circuit faults between the power battery and the heating circuit that cannot be found in the existing technology. At the same time, a battery management system is also proposed to solve the problem that the existing technology cannot and find Micro-short circuit fault problem between power battery and heating circuit

Method used

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  • Battery system, micro short circuit fault detection method thereof and battery management system
  • Battery system, micro short circuit fault detection method thereof and battery management system
  • Battery system, micro short circuit fault detection method thereof and battery management system

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Embodiment approach 1

[0040] In this implementation manner, system embodiments and method embodiments are involved, which will be introduced respectively below.

[0041] System embodiment:

[0042] Such as figure 2 The battery system shown includes a power battery, a heating circuit and a battery management system BMS, wherein the power battery is composed of several single batteries B1,..., Bn-1, Bn, and the heating circuit is sequentially provided with a total positive contactor Kp , heating wires R1,..., Rj-1, Rj and the total negative contactor Kn, the first end of the total positive contactor Kp is connected to the total positive pole of the power battery, and the first end of the total negative contactor Kn is connected to the total negative pole of the power battery , the battery management system BMS includes a memory and a processor, as well as a computer program stored on the memory and run on the processor, wherein the processor respectively detects the total positive pole and the tota...

Embodiment approach 2

[0097] In this implementation manner, system embodiments and method embodiments are involved, which will be introduced respectively below.

[0098] System embodiment:

[0099] Such as Figure 5 As shown, this embodiment proposes a battery system. Unlike the battery system in the system embodiment of Embodiment 1, the processor of the battery management system BMS in the battery system of this embodiment does not need to detect the total negative contact in the connection thermal circuit. The processor detects the second end of the total positive contactor Kp connected to the power battery and the second end of the total positive contactor Kp in the heating circuit respectively, and the processor also controls the connection between the total positive contactor Kp and the total negative contactor. Contactor Kn.

[0100] In this embodiment, the processor of the battery management system BMS is coupled to the memory, and the processor implements the micro-short circuit fault de...

Embodiment approach 3

[0116] In this implementation manner, system embodiments and method embodiments are involved, which will be introduced respectively below.

[0117] System embodiment:

[0118] Such as Figure 6 As shown, this embodiment proposes a battery system. Unlike the battery system in the system embodiment of Embodiment 1, the processor of the battery management system BMS in the battery system of this embodiment does not need to detect the total positive contact in the connection thermal circuit. The processor detects the second end of the total positive pole and the total negative pole connected to the power battery, and the second end of the total negative contactor Kn in the heating circuit, and the processor also controls the connection between the total positive contactor Kp and the total negative pole. Contactor Kn.

[0119] In this embodiment, the processor of the battery management system BMS is coupled to the memory, and the processor implements the micro-short circuit fault...

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Abstract

The invention relates to a battery system, a micro short circuit fault detection method thereof and a battery management system, and belongs to the field of fault diagnosis of the battery system. According to the detection method of the invention, the voltage between the total positive electrode of the power battery and the second end of the total positive contactor in a heating circuit is detected and judged, and / or the voltage between the total negative electrode of the power battery and the second end of the total negative contactor in the heating circuit is detected and judged, so that the micro short circuit fault between the power battery and the heating circuit can be quickly and timely detected. Compared with the prior art, the micro short circuit fault detection method can detect the micro short circuit fault faster and earlier before the temperature and the voltage of the battery are greatly changed, the micro short circuit fault detection method is simple in principle and practical, short circuit fault diagnosis can be carried out by using existing battery management system hardware resources, so that the function development cost is reduced, and the market application value is achieved.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of battery systems, and in particular relates to a battery system, a micro-short-circuit fault detection method thereof, and a battery management system. Background technique [0002] At present, the battery system of new energy vehicles is generally equipped with a heating circuit to solve the problem of insufficient low-temperature performance of the battery, such as figure 1 As shown, the total positive contactor Kp, the heating wires R1, ..., Rj-1, Rj and the total negative contactor Kn are sequentially arranged in series in the heating circuit, the total positive contactor Kp is connected to the total positive pole of the power battery, and the total negative contactor The device Kn is connected to the total negative pole of the power battery. When there are foreign objects in the battery system, causing the corresponding positions of the battery protective blue film LM and the heating film pr...

Claims

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Application Information

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IPC IPC(8): B60L58/27G01R31/52
CPCB60L58/27G01R31/52Y02T10/70
Inventor 高万兵赵宇斌邵玉龙游祥龙
Owner ZHENGZHOU YUTONG BUS CO LTD
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