Method for correcting power battery SOC
A power battery, SOC1 technology, applied in battery/fuel cell control devices, measuring electricity, electric vehicles, etc., can solve problems such as inaccurate SOC estimation, solve SOC errors, improve SOC estimation accuracy, and solve battery characteristic parameters. accurate effect
Active Publication Date: 2019-11-22
力高(山东)新能源技术股份有限公司
View PDF14 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the problem of inaccurate SOC estimation, the present invention provides a method for correcting the SOC of a power battery
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] like figure 1 As shown, a method for correcting the SOC of a power battery includes the following steps:
[0032] S1. Turn on the BMS of the battery management system, and judge whether the battery is in the charging state or the discharging state according to the connection status of the charging gun. If the battery is in the charging state, enter S2, otherwise enter S8;
[0033] S2. Determine whether the battery voltage is greater than or equal to V every set time 0 , V 0 Is the battery is charged to the SOC with the specified current 0 When the voltage value, choose V 0 The principle is that V 0 SOC caused by changes 0 change is small, usually V 0 Select the voltage close to full charge, if it is judged to be true, enter S3, otherwise enter S2;
[0034] S3. Determine whether the battery SOC is greater than or equal to the SOC 0 , if the judgment is true, enter S5, otherwise enter S4; SOC 0 Set the value for the system before the step loop.
[0035] S4. Adju...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the field of power battery management systems, especially to a method for correcting a power battery SOC. The method comprises the steps of: S1, opening a battery management system BMS, according to the connection state of a charging gun, determining whether the battery is in a charging state or a discharging state, if the battery is in the charging state, entering S2, orelse, entering S8; S2, determining whether the voltage of the battery is larger than or equal to V0 or not at a certain interval, if yes, entering S3, or else, entering S2; S3, determining whether thebattery SOC is larger than or equal to SOC0, if yes, entering the S5, or else, entering S4; S4, regulating the battery SOC as SOC0, and entering the S5; S5, determining whether the battery is fully charged to a fully-charged voltage or not at a certain interval, if yes, entering S6, or else, entering S5; S6, calculating SOC1 according to the amplitude [delta]SOC of the SOC jumped to 100% when thebattery has a fully-charged voltage; S7, replacing SOC0 with the SOC1 calculated in the S6; and S8, ending. The SOC error convergence is achieved through a closed-loop process.
Description
technical field [0001] The invention relates to the field of power battery management systems, in particular to a method for correcting the SOC of a power battery. Background technique [0002] With the popularity of electric vehicles, how to make vehicles safe and reliable and improve power performance has become an increasingly important issue. The performance of the battery depends on the SOC value of the battery. If you want to ensure the safe and stable operation of electric vehicles, avoid car crashes, provide appropriate power output, and extend battery life, you must ensure that the estimated battery SOC is accurate and reliable. At present, the most common methods for estimating the SOC of power batteries include the ampere-hour integration method, the Kalman filter method, and the parameter identification method, etc., but the battery parameters used in these methods are all fixed. With the passage of time, the battery gradually ages and the internal resistance i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/374G01R31/3828B60L58/12
CPCG01R31/374G01R31/3828B60L58/12Y02T10/70
Inventor 沈永柏王翰超王云孙艳康义尹坤李享刘欢
Owner 力高(山东)新能源技术股份有限公司