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Power battery display SOC calibration method and device, equipment and storage medium

A power battery and calibration method technology, applied in the field of vehicles, can solve the problems of reducing the driver's driving experience and driving comfort, large errors in estimation methods, and unfavorable judgment of the driver's vehicle battery life, so as to provide driving experience and driving comfort. The effect of comfort and avoidance of driving confusion

Pending Publication Date: 2022-05-24
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the acquisition of SOC is usually directly estimated by the battery management system, but the estimation method will have a large error, and the error is not regular, directly outputting and displaying the estimated value is not conducive to the driver's perception of the vehicle. The judgment of battery life reduces the driver's driving experience and driving comfort

Method used

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  • Power battery display SOC calibration method and device, equipment and storage medium
  • Power battery display SOC calibration method and device, equipment and storage medium
  • Power battery display SOC calibration method and device, equipment and storage medium

Examples

Experimental program
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Embodiment 1

[0043] figure 1 This is a schematic flowchart of a method for calibrating the display SOC of a power battery according to Embodiment 1 of the present invention. The method can be executed by a device for calibrating the display SOC of a power battery, and the device can be composed of hardware and / or software. The method for calibrating the display SOC of a power battery provided by the embodiment of the present invention includes the following steps:

[0044]S110: Obtain the first mapping relationship between the initial SOC value of the power battery and the accumulated electric energy, and the allowable upper limit SOC value in the initial SOC value and the allowable lower limit SOC value

[0045] Wherein, the first mapping relationship between the initial SOC value of the power battery and the accumulated electric energy may be a calculation formula or a table. For example, taking the first mapping relationship as an example, the first mapping relationship can be deter...

Embodiment 2

[0060] figure 2 The second embodiment of the present invention provides a schematic flowchart of a method for calibrating the display SOC of a power battery. On the basis of the above embodiment, a first mapping relationship between the initial SOC value and the accumulated electric energy is specifically provided. The technical solution of this embodiment includes:

[0061] S210. Based on the battery management module of the power battery, obtain the relationship curve between the discharge voltage, the discharge current, and the discharge time and the initial SOC value of the power battery during the discharge process.

[0062] S220: Determine a mapping relationship table between each initial SOC value and the accumulated electric energy according to the relationship curve between the discharge voltage, the discharge current, and the discharge time and the initial SOC value.

[0063] The battery management module can obtain the discharge voltage, discharge current and disc...

Embodiment 3

[0071] image 3 This is a schematic flowchart of a method for calibrating the display SOC of a power battery provided by the third embodiment of the present invention. On the basis of the above embodiment, a solution for determining the display SOC value is specifically provided. The technical solution of this embodiment includes:

[0072] S301. Based on the battery management module of the power battery, obtain the relationship curve between the discharge voltage, the discharge current, and the discharge time and the initial SOC value of the power battery during the discharge process.

[0073] S302. Determine a mapping relationship table between each initial SOC value and the accumulated electric energy according to the relationship curve between the discharge voltage, the discharge current, and the discharge time and the initial SOC value.

[0074]S303. Determine the mapping relationship table between the initial SOC value and the accumulated electric energy as the first ma...

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Abstract

The embodiment of the invention discloses a power battery display SOC calibration method and device, equipment and a storage medium. The method comprises the steps that a first mapping relation between initial SOC values of a power battery and accumulated electric energy is acquired, an allowable upper limit SOC value and an allowable lower limit SOC value in the initial SOC values are acquired, and an energy coefficient beta is determined according to the first mapping relation, the allowable upper limit SOC value and the allowable lower limit SOC value; and determining a second mapping relation between the initial SOC value and the display SOC value based on the energy coefficient beta and the first mapping relation. The problem that the residual electric quantity is inconsistent with the actual driving mileage due to the fact that the battery management module inaccurately estimates the residual electric quantity of the power battery is solved, and the driving experience feeling of a driver is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of vehicles, and in particular, to a method, device, device, and storage medium for calibrating the display SOC of a power battery. Background technique [0002] The rapid development of new energy vehicles has provided us with a convenient way to travel. Power battery is an important part of new energy vehicles, providing driving force for new energy vehicles. With the driving of the vehicle, the power of the power battery is continuously consumed, and the available state of charge (State of Charge, SOC) in the battery can reflect the number of kilometers that the vehicle has traveled. Usually, SOC=(remaining power / rated power)* 100%. [0003] In the prior art, the acquisition of SOC is usually obtained by direct estimation by the battery management system, but the estimation method has large errors, and the errors are not regular. The judgment of the battery life reduces the driver's driving...

Claims

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Application Information

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IPC IPC(8): G01R31/382
CPCG01R31/382Y02T10/70
Inventor 姜鹏翰李晶刘元治李想赵开成李畅
Owner CHINA FIRST AUTOMOBILE