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Method, system, and vehicle for detecting state of health of power battery

A power battery, health status technology, applied in the automotive field, can solve the problems of affecting efficiency, large amount of code, long cycle and so on

Active Publication Date: 2021-04-20
BEIQI FOTON MOTOR CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In related technologies, the estimation of SOH is usually calculated based on the number of charge and discharge cycles. This algorithm is somewhat one-sided and lacks accuracy; there are also health status estimates based on the aging model of the battery model. This algorithm is not only code-intensive Relatively large, and need to do a lot of aging tests, the cycle is very long, affecting the efficiency

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  • Method, system, and vehicle for detecting state of health of power battery
  • Method, system, and vehicle for detecting state of health of power battery
  • Method, system, and vehicle for detecting state of health of power battery

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] The method, system and vehicle for detecting the state of health of a power battery according to embodiments of the present invention will be described below with reference to the accompanying drawings.

[0029] figure 1 It is a flow chart of a method for detecting the state of health of a power battery according to an embodiment of the present invention. Such as figure 1 As shown, the method for detecting the state of health of a power battery according to an embodiment of the present invention includes the following steps:

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Abstract

The invention discloses a method, a system and a vehicle for detecting the health state of a power battery. The method includes: obtaining the current battery capacity of the power battery during the charging process; obtaining the capacity ratio of the power battery according to the current battery capacity and the preset allowable charge and discharge cycles of the power battery; obtaining the first state of health of the power battery according to the capacity ratio; The first state of health and the preset dynamic weight coefficient correct the second state of health of the power battery, wherein the second state of health is obtained according to the number of charge and discharge times of the power battery. The health state detection method of the power battery of the present invention can obtain the health state of the power battery accurately, simply and conveniently.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for detecting the health state of a power battery and a vehicle. Background technique [0002] The estimation of the state of health of the power battery (called SOH, State-of-Health) is very important for the battery management system (BMS, BATTERY MANAGEMENT SYSTEM), which reflects the state of the power battery. [0003] In related technologies, the estimation of SOH is usually calculated based on the number of charge and discharge cycles. This algorithm is somewhat one-sided and lacks accuracy; there are also health status estimates based on the aging model of the battery model. This algorithm is not only code-intensive It is relatively large, and requires a lot of aging tests, and the cycle is very long, which affects the efficiency. Contents of the invention [0004] The present invention aims at solving one of the technical problems in the relate...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392
CPCG01R31/392
Inventor 孙四军
Owner BEIQI FOTON MOTOR CO LTD
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