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Battery fault judgment and processing method for battery pack

A technology for battery faults and processing methods, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve problems such as inability to effectively guide balanced work, failure to reflect the cause of failure, etc., to achieve reliable fault diagnosis process and avoid repeated maintenance. , reduce the effect of misjudgment

Active Publication Date: 2018-01-19
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the defect of this fault judgment method is that it does not reflect the cause of the fault and cannot effectively guide the follow-up equalization work.

Method used

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  • Battery fault judgment and processing method for battery pack
  • Battery fault judgment and processing method for battery pack
  • Battery fault judgment and processing method for battery pack

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Embodiment Construction

[0045] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

[0046] like figure 1 As shown, this embodiment discloses a method for judging and processing a battery fault, including the following steps S1 to S3:

[0047] S1. Obtain the voltage value of each battery cell of the power battery pack at the charging and discharging end;

[0048] It should be noted that the power battery pack in this embodiment is a battery pack composed of 8P48S, and the voltage value of each battery cell connected in series in the power battery pack at the charging and discharging end is obtained; the power battery pack is obtained at the charging end through the vehicle operation data If the voltage value of each series-connected batter...

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Abstract

The invention discloses a battery fault judgment and processing method for a battery pack and belongs to the technical field of batteries. The method comprises the steps of S1, obtaining a voltage value at a charge / discharge tail end of a single battery of the power battery pack; S2, comparing the voltage value at the charge / discharge tail end of the single battery with a voltage average value when the charge / discharge is carried out; and S3, judging whether a fault exists in the single battery or not according to a comparison result and processing the fault. According to the method, the faultjudgment is carried out according to the voltage value at the charge / discharge tail end of the single battery, the reliable diagnosis of the power battery pack fault is realized, the misjudgment of the battery pack fault is reduced, an effective maintenance method is provided, the unnecessary and repeated maintenance of the battery pack is avoided, and the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a method for judging and processing battery failures. Background technique [0002] In the operation of electric vehicles, it is necessary to connect the battery cells in series and parallel to form a battery pack to meet the power requirements during the operation of the vehicle. Due to the large number of battery cells in the battery pack, the instability of its consistency will seriously affect the capacity, energy, pressure difference, cruising range and service life of the battery pack, thereby affecting the user experience during use. The charge and discharge current of the battery pack during the operation of the vehicle, the SOC state used, the ambient temperature, the position of the battery cell inside the battery pack, and the self-discharge of the battery will also affect the difference in battery attenuation, making the battery cell in the battery pack. The SOC st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 杨思文厉运杰荆孟娜
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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