Method, device and equipment for correcting state of charge of power battery

A technology of power battery and state of charge, which is applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problem of inaccurate estimation of SOC, etc.

Active Publication Date: 2021-04-23
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The invention provides a method, device and equipment for correcting the state of charge of a power battery, which is used to solve the problem in the prior art that the estimated SOC is only corrected by the static pressure difference consistency coefficient, resulting in inaccurate estimation of the SOC

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  • Method, device and equipment for correcting state of charge of power battery
  • Method, device and equipment for correcting state of charge of power battery
  • Method, device and equipment for correcting state of charge of power battery

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Embodiment Construction

[0048] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0049] Such as figure 1 As shown, the embodiment of the present invention provides a method for correcting the state of charge of the power battery, and the method for correcting the state of charge of the power battery includes:

[0050]S11: Obtain the consistency coefficient of the static pressure difference before the electric vehicle is powered on and the consistency coefficient of the dynamic pressure difference after the high-voltage powe...

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Abstract

The invention provides a method, device and equipment for correcting the state of charge of a power battery. The method for correcting the state of charge of the power battery includes: obtaining the consistency coefficient of the static pressure difference before the electric vehicle is powered on and The dynamic pressure difference consistency coefficient; select the smallest value among the static pressure difference consistency coefficient and the dynamic pressure difference consistency coefficient as the pressure difference consistency coefficient; according to the pressure difference consistency coefficient, charge the power battery The status is corrected. The invention combines the dynamic pressure difference consistency coefficient and the static pressure difference consistency coefficient to correct the estimated SOC and improve the accuracy of estimating the SOC.

Description

technical field [0001] The invention relates to the field of state of charge correction, in particular to a method, device and equipment for correcting the state of charge of a power battery. Background technique [0002] The SOC (State of Charge) of the battery is a very important parameter of the power battery management system, which directly affects the performance of the electric vehicle and the driving experience of the driver. Therefore, the SOC of the battery has become one of the important criteria for consumers to choose electric vehicles. [0003] There are many factors that affect the SOC of the battery, including the discharge current of the battery, the temperature of the battery, the cumulative charging time of the battery, the highest or lowest voltage of the single cell in the battery pack, the resting time of the vehicle, etc., any factor Changes can affect the state of charge of the power battery, and among them, the influence of the voltage difference be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/387
Inventor 闫霞黄颍华邵桂欣张翰雄
Owner BEIJING ELECTRIC VEHICLE
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