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Power battery state-of-charge lower limit control method and device and vehicle

A state-of-charge, power battery technology, applied in battery/fuel cell control devices, control devices, hybrid vehicles, etc., can solve problems affecting the normal function of vehicles

Inactive Publication Date: 2021-03-19
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the lower limit of the state of charge (State of Charge, SOC) of the power battery used in hybrid vehicles is fixed during the use of the vehicle. As a result, the low SOC value of the battery is not enough to enable the vehicle to start normally at low temperature, thus affecting the normal function of the vehicle after the next power-on

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  • Power battery state-of-charge lower limit control method and device and vehicle
  • Power battery state-of-charge lower limit control method and device and vehicle
  • Power battery state-of-charge lower limit control method and device and vehicle

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Embodiment Construction

[0032] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0033] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0034] figure 1 It is a flowchart of a method for controlling the lower limit of the state of charge of a power battery provided by an embodiment of the present invention. Such as figure 1 As shown, the control method includes:

[0035] Step S11, detecting the lowest ambient temperature for at least a period of time;

[0036] Specifically, the ambient temperature may be detected by a temperature sensor, and then stored before calculating the minimum ambient temperature. The at least a period of time may be, for example, a period of time, such as 5 days, 10 days or 30 days, or two periods of time, such as two 5 days. If it is two periods of time, the respective minimum ambient ...

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Abstract

The invention relates to the technical field of new energy vehicles, and provides a power battery state-of-charge lower limit control method and device and a vehicle. The power battery state-of-chargelower limit control method comprises the steps: detecting the lowest environment temperature within at least one period of time; according to the lowest environment temperature in the at least one period of time, predicting the lowest environment temperature in a preset time period after the at least one period of time; according to the lowest environment temperature in the preset time period, determining a lowest state-of-charge value capable of meeting the engine starting power requirement of the vehicle at the lowest environment temperature in the preset time period; and adjusting the lower limit value of the state of charge according to the minimum state of charge value. According to the invention, the SOC value of a battery in the low-temperature environment can be ensured to enablethe vehicle to be started normally.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method, device and vehicle for controlling the lower limit of the state of charge of a power battery. Background technique [0002] With the increasing emergence of energy crisis and environmental pollution, hybrid electric vehicles have become an important direction for the development of the automobile industry because of their outstanding advantages in energy saving and environmental protection. At present, the lower limit of the state of charge (State of Charge, SOC) of the power battery used in hybrid vehicles is fixed during the use of the vehicle. As a result, the low SOC value of the battery is not enough to enable the vehicle to start normally at low temperature, thus affecting the normal function of the vehicle after the next power-on. Contents of the invention [0003] In view of this, the present invention aims to propose a method, device and vehicle ...

Claims

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Application Information

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IPC IPC(8): B60L58/12
CPCB60L58/12B60L2240/44B60L2240/54B60L2240/662B60L2240/80B60L58/13F02N2200/061F02N2200/122B60L2260/56F02N11/0862F02N19/00F02N2300/2006F02N2200/046G01R31/382H02J7/0048H01M10/443H01M2220/20H02J7/0063
Inventor 赵晴陈淑江
Owner GREAT WALL MOTOR CO LTD
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