Battery micro short circuit detection method and device
A detection method and micro-short-circuit technology, which can be used in measurement devices, short-circuit tests, and electrical measurement, etc., and can solve problems such as inability to perform micro-short-circuit detection.
Active Publication Date: 2021-06-22
JINGWEI HIRAIN (TIANJIN) RES&DEV CO LTD
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Problems solved by technology
The existing detection scheme is to perform micro-short circuit detection on different battery cells that have been fully balanced; and when the battery cells are not balanced, micro-short circuit detection cannot be performed
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[0130] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0131] see figure 1 , a battery micro-short circuit detection method provided in this embodiment, comprising the following steps:
[0132] S11: Measure the open circuit voltages of the battery under test and the normal battery respectively.
[0133] A parameter detection circuit such as figure 2 As shown, four output interfaces including A, B, C and D are respectively connected to the positive and negative poles of the battery 1 and the positive and negativ...
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The invention provides a battery micro short circuit detection method and device. The method comprises the following steps: respectively measuring open-circuit voltages of a to-be-detected battery and a normal battery; after the to-be-detected battery and the normal battery are connected in parallel, measuring the current between the to-be-detected battery and the normal battery; according to the open-circuit voltage of the to-be-detected battery, the open-circuit voltage of the normal battery, the measured current and the pre-calibrated corresponding relation between the state parameters of the to-be-detected battery and the normal battery and the SOC, obtaining N determination parameters through calculation, wherein N is larger than or equal to 2; and when the at least two judgment parameters meet preset conditions, determining that the to-be-detected battery has micro-short circuit, otherwise, determining that the to-be-detected battery does not have micro-short circuit. According to the invention, through comprehensive analysis of the at least two judgment parameters, whether the micro short circuit occurs in the to-be-detected is judged, and whether the micro short circuit occurs can be detected under the condition that the battery monomers are not balanced.
Description
technical field [0001] The invention relates to the field of battery technology, and more specifically, to a method and device for detecting a battery micro-short circuit. Background technique [0002] Battery micro-short circuit refers to a small short-circuit phenomenon that occurs between battery cells of a battery pack or within a single battery cell. This tiny short circuit does not directly burn out the battery, but degrades the battery's performance over a period of weeks or months, rendering a single battery cell or the entire battery pack completely unusable. Therefore, it is necessary to detect the micro-short circuit fault of the battery to ensure the safety of the battery. The existing detection scheme is to perform micro-short circuit detection on different battery cells that have been fully balanced; however, when the battery cells are not balanced, micro-short circuit detection cannot be performed. Contents of the invention [0003] In view of this, the pr...
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IPC IPC(8): G01R31/52G01R31/385G01R31/388G01R31/389
CPCG01R31/52G01R31/385G01R31/388G01R31/389
Inventor 高尚段崇伟张明轩
Owner JINGWEI HIRAIN (TIANJIN) RES&DEV CO LTD