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Battery pack fault detection method and device, high-voltage box, battery pack and vehicle

A technology for fault detection and battery packs, which is applied in measuring devices, circuit breaker testing, and electrical measurement, can solve problems such as inaccurate fault detection results, and achieve the effects of improving the accuracy of results, avoiding low reliability, and protecting safety

Active Publication Date: 2018-04-10
컨템포러리엠퍼렉스테크놀로지씨오리미티드
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Problems solved by technology

[0005] Embodiments of the present invention provide a battery pack fault detection method and device, a high-voltage box, a battery pack, and a vehicle, aiming to solve the technical problem of inaccurate fault detection results of switches in the high-voltage circuit of the battery pack in the related art, and to improve the battery pack. The accuracy of the fault detection result of the switch in the high-voltage circuit avoids false detection

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  • Battery pack fault detection method and device, high-voltage box, battery pack and vehicle
  • Battery pack fault detection method and device, high-voltage box, battery pack and vehicle
  • Battery pack fault detection method and device, high-voltage box, battery pack and vehicle

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Embodiment Construction

[0034] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0037] figure 1 A flow chart of a battery pack ...

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Abstract

An embodiment of the invention discloses a battery pack fault detection method and device, a high-voltage box, a battery pack and a vehicle. The battery pack fault detection method comprises the following steps: sending a first electrical signal to one end of a switch in a battery pack high-voltage loop, and collecting a second electrical signal in the battery pack high-voltage loop at the other end of the switch; according to theoretical opening / closing state of the switch, judging whether the relative relation of the first electrical signal and the second electrical signal on frequency is ina threshold range corresponding to the theoretical opening / closing state; if the judgment result is yes, determining that the switch has no fault; and when the judgment result is no, determining thatthe switch has a fault. According to the technical scheme, result accuracy of fault detection of the switch in the battery pack high-voltage loop can be improved, and furthermore, safety of the battery pack high-voltage loop and even the whole vehicle can be ensured.

Description

【Technical field】 [0001] The invention relates to the technical field of batteries, in particular to a battery pack fault detection method and device, a high-voltage box, a battery pack and a vehicle. 【Background technique】 [0002] At present, with the continuous development and growth of new energy vehicles and other vehicles, the safety issues of new energy vehicles have attracted more and more attention. Whether it can work normally will be directly related to the safety of the entire battery system. [0003] In related technologies, it is generally detected whether the high-voltage relay in the battery pack is faulty through auxiliary contact diagnosis or high-voltage sampling diagnosis. Among them, the auxiliary contact diagnosis depends on the mechanical structure to obtain the diagnostic structure. However, the mechanical structure is prone to damage, resulting in low diagnostic reliability of the auxiliary contact diagnosis; while the high-voltage sampling diagnosi...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01R31/327
CPCG01R31/3272G01R31/36
Inventor 刘萍
Owner 컨템포러리엠퍼렉스테크놀로지씨오리미티드
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