Method for quickly judging battery fault

A battery failure and fast technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., to achieve vehicle maintenance, reduce market failure reporting, and enhance brand competitiveness

Pending Publication Date: 2021-10-22
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the consistency of the battery is more obvious at the end of charging and discharging, and the user rarely uses the battery pack when the power is low, so the battery failure and its cause cannot be judged in time

Method used

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  • Method for quickly judging battery fault

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Embodiment Construction

[0029] In the following, the technical solution of the present invention will be described in detail through specific embodiments, and many specific details are set forth in the following description so as to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0030] like figure 1 As shown, a method for rapidly determining a battery failure proposed by the present invention includes steps S1 to S3:

[0031] S1: Continuously discharge the battery module of the whole vehicle to the lowest voltage threshold to obtain the discharge curve of the battery module;

[0032] For the regular maintenance of vehicles operating in the market, during the maintenance period, the battery mo...

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Abstract

The invention discloses a method for quickly judging a battery fault, which comprises the following steps of: S1, continuously discharging a battery module of a whole vehicle to a minimum voltage threshold to obtain a discharging curve of the battery module; S2, performing data comparison on the voltage distribution of the lowest module in the battery pack in the discharging process and the average voltage value of the battery module according to the discharging curve to obtain the capacity difference of an abnormal module; and S3, comparing the capacity difference of the abnormal module with a preset capacity difference threshold, and judging whether a battery in the battery pack breaks down or not according to the comparison result and the running time of the whole vehicle. Through the battery fault judgment method, a battery fault can be pre-judged in advance, market fault rate report is reduced, maintenance is performed in advance, and the brand competitiveness of the battery is enhanced.

Description

technical field [0001] The invention relates to the technical field of battery fault detection, in particular to a method for quickly judging battery faults. Background technique [0002] In the operation of electric vehicles, it is necessary to connect the single batteries in series and parallel to form a battery pack to meet the power demand during the operation of the vehicle. The battery pack is affected by many uncontrollable factors during the manufacturing process or use, which will cause differences between battery cells, thereby reducing the power performance of the battery pack. The capacity of the battery pack will decline after the vehicle has gone through multiple charge and discharge cycles. At this time, there are mainly two reasons for this. On the one hand, the normal attenuation of the battery, on the other hand, the inconsistency of the module state of charge (SOC) in the battery pack affects the capacity performance and causes capacity attenuation. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842
CPCG01R31/3842
Inventor 杨思文厉运杰周祥丁绍玉
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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