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Method and device for correcting state of charge of automobile battery

A state of charge and car battery technology, applied in the direction of measuring devices, measuring electricity, measuring electric variables, etc., can solve the problem of inaccurate estimation of the state of charge of the car battery, achieve the effect of state of charge correction and solve the problem of inaccurate estimation

Active Publication Date: 2020-05-22
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV +1
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  • Abstract
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Problems solved by technology

[0003] The main purpose of the present invention is to provide a method and device for correcting the state of charge of the automobile battery, which solves the problem that the estimation of the state of charge of the automobile battery is not accurate enough

Method used

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  • Method and device for correcting state of charge of automobile battery
  • Method and device for correcting state of charge of automobile battery
  • Method and device for correcting state of charge of automobile battery

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Embodiment Construction

[0053] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] refer to figure 1 , the method for correcting the state of charge of a car battery in an embodiment of the present invention includes the following steps:

[0055] Step S1, calculating in real time the state of charge value, temperature and open circuit voltage value to be corrected of the battery pack during the operation of the vehicle;

[0056] Step S2, test to get the battery pack in at different temperatures The open-circuit voltage-state-of-charge curve of the open-circuit voltage-state-of-charge curve is obtained, and the area satisfying the preset condition on the open-circuit voltage-state-of-charge curve is obtained as an effective corrected voltage area;

[0057] Step S3: Select an effective corrected voltage range at the corresponding temperature according to the temperature of the battery pack d...

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Abstract

The present invention provides an automobile battery state of charge correction method and device. The method comprises the steps of real-timely calculating the to-be-corrected state of charge values, the temperatures and the open-circuit voltage values of a battery pack during the operation process of an automobile; testing to obtain an open-circuit voltage-state of charge curve of the battery pack under different temperatures, and obtaining the areas satisfying the preset conditions in the open-circuit voltage-state of charge curve as the effective correction voltage areas; selecting the effect correction voltage area under the corresponding temperature according to the temperature of the battery pack during the operation process of the automobile, and obtaining the corresponding state of charge value in the selected effective correction voltage area according to the open-circuit voltage value of the battery pack during the operation process of the automobile. According to the automobile battery state of charge correction method and device provided by the present invention, the problem that the automobile battery state of charge estimation is not accurate enough, is solved.

Description

technical field [0001] The invention relates to the field of automobile batteries, in particular to a method and device for correcting the state of charge of an automobile battery. Background technique [0002] With the development of society, electric vehicles have become an important means of transportation in people's lives. The state of charge estimation technology of electric vehicles is the key and foundation of the battery management system of electric vehicles. Accurate state of charge estimation can improve the safety of batteries, prolong the service life of batteries, improve the efficiency of battery use, and eliminate mileage concerns, etc. are of great significance. Existing car batteries mainly use the combination of the ampere-hour integration method and the open circuit voltage method, but this method requires the battery to be fully static to reach the steady state of the battery, and the estimation method does not take into account the battery charge and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382
CPCG01R31/374G01R31/392G01R31/396
Inventor 王海青夏必忠王明旺王威孙威徐智慧赖勇智
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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