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Method and device for estimating battery pack health

A technology for estimating device and health degree, which is applied in the field of battery pack health degree estimation method and device, can solve problems such as inconsistency, battery pack health degree not reflecting the aging state of electric storage unit, lack of accurate calculation of battery pack health degree, etc. Achieve the effect of accurate health

Active Publication Date: 2019-10-18
CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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AI Technical Summary

Problems solved by technology

The electrical system powered by the battery pack lacks the opportunity to accurately calculate the above-mentioned health of the battery pack
[0004] On the other hand, due to the inconsistency of the state of charge (State of Charge, SOC) of different power storage units in the battery pack, it is difficult to locate the specific power storage unit
[0005] On the other hand, due to the inconsistency in the aging process of each storage unit in the battery pack, the overall health of the battery pack cannot reflect the actual aging state of each storage unit.
[0006] Based on the above problems, it is difficult to obtain a more accurate battery pack SOHC estimation method for the SOHC of the battery pack in the prior art.

Method used

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  • Method and device for estimating battery pack health
  • Method and device for estimating battery pack health
  • Method and device for estimating battery pack health

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Embodiment Construction

[0027] Features and exemplary embodiments of various aspects of the invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention. The present invention is by no means limited to any specific configurations and algorithms presented below, but covers any modification, substitution and improvement of elements, components and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.

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Abstract

The invention discloses a method and a device for estimating the health degree of a battery pack. The method may include: detecting changes in health index of each storage unit in the battery pack during charging or discharging. According to the change of the health degree index obtained through detection, it is judged whether the power storage unit has an opportunity to correct the state of charge within a predetermined period of time for health degree estimation. Calculate the corrected state of charge value of the electric storage unit with two or more correction opportunities, and the accumulative capacity change between each two correction opportunities of the electric storage unit with two or more correction opportunities One or more cumulative changes in capacity. The above data obtains the first estimated health degree of the electric storage unit with two or more correction opportunities, and estimates the health degree of the battery pack according to the first estimated health degree of the electric storage unit with two or more correction opportunities . Can accurately estimate the health of the battery pack.

Description

technical field [0001] The invention belongs to the technical field of battery packs, and in particular relates to a method and device for estimating the health degree of a battery pack. Background technique [0002] Because the battery pack will age or deteriorate after long-term use, it is necessary to estimate the state of health (State-of-Health, SOH) of the battery pack, also known as the life state, and some are also called aging, deterioration degree or backward battery pack, literature There are different names in Chinese and Chinese, but the meaning is basically the same. Among them, estimating the health degree of the battery pack based on the cumulative change of the battery pack capacity is generally represented by SOHC. The prior art has the following problems in the estimation of the SOHC of the battery pack: [0003] On the one hand, in an electrical system powered by a battery pack, for example, during normal use of an electric vehicle. The electrical syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392
CPCG01R31/392G01R31/396G01R31/382G01R31/385G01R31/3646G01R31/3648
Inventor 汤慎之卢艳华
Owner CONTEMPORARY AMPEREX RUNZHI SOFTWARE TECH LTD NINGDE CITY
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