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SoC smooth control method, device, battery management system and vehicle

A smooth control and vehicle technology, applied in the automotive field, can solve problems such as inability to effectively reflect the true value of remaining power, SOC inconsistency, SOC jump, etc., and achieve the effect of improving user experience, no sense of violation, and improving reliability

Active Publication Date: 2020-06-16
BEIQI FOTON MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in related technologies, the SOC of the vehicle is prone to inconsistency before and after power-off and power-on, that is, there will be a certain difference between the measured value of the remaining power after the vehicle is powered on and the remaining power value displayed when the vehicle was stopped last time, resulting in a jump in the SOC, which cannot be used effectively. Reflect the real value of the remaining power, which needs to be improved

Method used

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  • SoC smooth control method, device, battery management system and vehicle
  • SoC smooth control method, device, battery management system and vehicle
  • SoC smooth control method, device, battery management system and vehicle

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Embodiment Construction

[0029] 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 and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The method, device, battery management system and vehicle for smooth control of power battery SOC according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the method for smooth control of power battery SOC according to the embodiments of the present invention will be described with reference to the drawings.

[0031] figure 1 It is a flowchart of a smooth control method for power battery SOC according to an embodiment of the present invention.

[003...

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Abstract

The invention discloses a smooth control method and device for the SOC (state of charge) of a power battery, a battery management system and a vehicle. The smooth control method comprises the steps that an initial surplus electric quantity and a surplus electric quantity stored before powering-off are obtained to obtain an electric quantity deviation value; according to the initial surplus electric quantity, the current surplus electric quantity of the power battery is obtained; according to the electric quantity deviation value and a dynamic deviation compensation coefficient, a deviation compensation value is obtained; and according to the difference between the current surplus electric quantity and the deviation compensation value, the displayed SOC is obtained, wherein the dynamic deviation compensation coefficient is gradually decreased with lapsing of time. According to the smooth control method, the SOC displayed by a vehicle can be adjusted according to the dynamic deviation compensation coefficient, the condition that the SOC before powering-off and the SOC after powering-on are inconsistent is corrected, smooth treatment of the SOC of the power battery is achieved, saltusstep of the SOC of the power battery is effectively avoided, the accuracy of the SOC of the power battery is ensured, the reliability of the vehicle is improved, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a SOC smooth control method, device, battery management system and vehicle. Background technique [0002] The BMS (BATTERY MANAGEMENT SYSTEM, battery management system) estimates the SOC (State of Charge, the remaining power of the power battery), which can indirectly reflect the remaining energy of the power battery. Therefore, the estimation result of SOC must not only be accurate, but also be free from jumps, and the estimation results before and after power-on and power-off must be consistent. However, in related technologies, the SOC of the vehicle is prone to inconsistency before and after power-off and power-on, that is, there will be a certain difference between the measured value of the remaining power after the vehicle is powered on and the remaining power value displayed when the vehicle was stopped last time, resulting in a jump in the SOC, which cannot be used ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L58/12G01R31/382G01R31/3828
CPCY02T10/70
Inventor 孙四军
Owner BEIQI FOTON MOTOR CO LTD
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