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Method and device for estimating health state of power battery

A technology of power battery and state of health, which is applied in measurement devices, measurement of electricity, measurement of electric variables, etc., can solve problems such as large errors, high hardware and environmental requirements, and large amount of calculation.

Active Publication Date: 2019-04-12
SVOLT ENERGY TECHNOLOGY CO LTD
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Problems solved by technology

These methods generally have the problems of large amount of calculation, high hardware and environmental requirements, difficult operation, and large errors, and many researchers only consider a single battery cycle number index when estimating the health status of power batteries, and do not consider other influencing factors. The impact of power battery health status

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  • Method and device for estimating health state of power battery
  • Method and device for estimating health state of power battery
  • Method and device for estimating health state of power battery

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Embodiment Construction

[0054] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0055] In addition, the state of health of the power battery mentioned in the embodiments of the present invention refers to the ratio of the performance parameter to the nominal parameter after the power battery has been used for a period of time.

[0056] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0057] refer to figure 1 , shows a flow chart of steps of an embodiment of a method for estimating the state of health of a power battery according to the present invention, which may specifically include the following steps:

[0058] Step 101, receiving a request for estimating the state of health of the power battery.

[0059] In the embodiment of the present invention, when the electric vehicle is put into use, the state of health of th...

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Abstract

The invention provides a method and device for estimating the health state of a power battery. The method for estimating the health state of the power battery comprises the steps that a request for estimating the health state of the power battery is received; rated cycle times and cycle measurement parameters of the power battery are obtained, wherein the cycle measurement parameters comprise battery charging data, calendar time, influence factor parameters exceeding a preset threshold value and time information corresponding to the influence factor parameters exceeding the preset threshold value; the total cycle times are calculated and obtained according to the cycle measurement parameters; the health state of the power battery is calculated and obtained by using the total cycle times and the rated cycle times of the battery. By introducing a cumulative charge metering algorithm and a quantitative forwarding algorithm, the efficiency, accuracy and operability of estimating the healthstate of the power battery are significantly improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method and device for estimating the state of health of a power battery. Background technique [0002] As a new generation of transportation with low pollution, simple structure and low noise, new energy vehicles are an important direction for the future development of the automobile industry. At the same time, power batteries, as the main power source of new energy vehicles, account for a very high proportion of vehicle manufacturing costs. Therefore, it is very necessary to accurately estimate and monitor the health status of new energy vehicle power batteries. [0003] In the prior art, there is no specific quantitative index for the health state of the power battery. The industry generally regards the cycle number of the power battery of electric vehicles as the main measure index of the health state of the power battery. The industry generally adopts the experi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/396
CPCG01R31/3648
Inventor 任永昌高攀龙
Owner SVOLT ENERGY TECHNOLOGY CO LTD
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