Method and system for heat preservation of battery of vehicle, storage medium and processor

Patent metadata

Field	Value
Publication number	US-12545146-B2
Application number	US-202117918169-A
Country	US
Kind code	B2
Filing date	May 6, 2021
Priority date	May 7, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A method and a system for heat preservation of a battery of a vehicle, and a storage medium is provided. The method includes: detecting, in response to completing the charging of the vehicle, whether a current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery, and the temperature threshold value is configured as a lowest temperature value at which the battery is able to maintain normal performance; and controlling, when a detection result is yes, the vehicle to obtain an electrical energy from an external charging device to heat the battery, such that the battery is heated above the temperature threshold value to complete heat preservation of the battery. The method provided by the present application can heat the battery without consuming the power of the battery used for endurance mileage of the vehicle when the battery is charged.

First claim

What is claimed is:

1 . A method for heat preservation of a battery of a vehicle, comprising:
detecting, through a battery management system and/or a fuel cell unit, in response to completing the charging of the vehicle, whether a current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery, wherein the temperature threshold value is configured as a lowest temperature value at which the battery is able to maintain normal performance; controlling, through a vehicle controller, when a detection result is yes, the vehicle to obtain an electrical energy from an external charging device to heat the battery, such that the battery is heated above the temperature threshold value to complete heat preservation of the battery; and controlling, when the detection result is no or the battery has been heated above the temperature threshold value, the vehicle to enter a sleep mode, wherein the sleep mode is configured as that a powered device of the vehicle is in a power-off hibernation state; wherein after controlling the vehicle to enter the sleep mode, further comprising: repeating following steps until the vehicle is started: controlling the vehicle to be awakened from the sleep mode after the vehicle has entered the sleep mode for a preset time; continuing to detect whether the current temperature of the battery of the vehicle is lower than the temperature threshold value; controlling, when a continued detection result is yes, the vehicle to obtain an energy from an external charging device to heat the battery, such that the battery is heated above the temperature threshold value; and controlling, when the continued detection result is no or the battery has been heated above the temperature threshold value, the vehicle to continue to enter the sleep mode.

2 . The method according to claim 1 , wherein
the battery comprises a fuel cell and a power battery; and the step of detecting whether the current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery comprises:
detecting whether the current temperature of the fuel cell of the vehicle is lower than a preset temperature threshold value of the fuel cell, and detecting whether the current temperature of the power battery of the vehicle is lower than a preset temperature threshold value of the power battery;
the step of controlling, when the detection result is yes, the vehicle to obtain the electrical energy from the external charging device to heat the battery, such that the battery is heated above the temperature threshold value comprises:
controlling, when a detection result for the fuel cell is yes, the vehicle to obtain the electrical energy from the external charging device to heat the fuel cell, such that the fuel cell is heated above the temperature threshold value; and
controlling, when a detection result for the power battery is yes, the vehicle to obtain the electrical energy from the external charging device to heat the power battery, such that the power battery is heated above the temperature threshold value; and
the step of controlling, when the detection result is no or the battery has been heated above the temperature threshold value, the vehicle to enter the sleep mode comprises:
controlling the vehicle to enter the sleep mode when following conditions are met:
the detection result for the fuel cell is no or the fuel cell has been heated above the temperature threshold value; and the detection result for the power battery is no or the power battery has been heated above the temperature threshold value.

3 . The method according to claim 1 , further comprising:
controlling, in response to press operation of a user on a button for activating a function of charging and heat preservation, the vehicle to activate the function of charging and heat preservation, to perform the step of detecting whether the current temperature of the battery of the vehicle is lower than the preset temperature threshold value of the battery.

4 . A system for heat preservation of a battery of a vehicle, comprising:
a vehicle controller, configured for detecting, in response to completing the charging of the vehicle, whether a current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery, wherein the temperature threshold value is configured as a lowest temperature value at which the battery is able to maintain normal performance; and an on-board charger, configured for controlling, when a detection result is yes, the vehicle to obtain an electrical energy from a power grid to heat the battery through a heater, such that the battery is heated above the temperature threshold value to complete heat preservation of the battery; wherein the vehicle controller is further configured for controlling, when the detection result is no or the battery has been heated above the temperature threshold value, the vehicle to enter a sleep mode, wherein the sleep mode is configured as that a powered device of the vehicle is in a power-off hibernation state; and wherein the vehicle controller is further configured for repeating following steps until the vehicle is started after controlling the vehicle to enter the sleep mode: controlling the vehicle to be awakened from the sleep mode after the vehicle has entered the sleep mode for a preset time; continuing to detect whether the current temperature of the battery of the vehicle is lower than the temperature threshold value; controlling, when a continued detection result is yes, the vehicle to obtain an energy from an external charging device to heat the battery, such that the battery is heated above the temperature threshold value; and controlling, when the continued detection result is no or the battery has been heated above the temperature threshold value, the vehicle to continue to enter the sleep mode.

5 . The system according to claim 4 , wherein the battery comprises a fuel cell and a power battery; and
the vehicle controller configured for detecting whether the current temperature of the battery of the vehicle is lower than a preset temperature threshold value of the battery comprises:
the vehicle controller being configured for detecting whether the current temperature of the fuel cell of the vehicle is lower than a preset temperature threshold value of the fuel cell, and detecting whether the current temperature of the power battery of the vehicle is lower than a preset temperature threshold value of the power battery; and
the vehicle controller configured for controlling, when the detection result is yes, the vehicle to obtain the electrical energy from the external charging device to heat the battery, such that the battery is heated above the temperature threshold value comprises:
the vehicle controller being configured for controlling, when a detection result for the fuel cell is yes, the vehicle to obtain the electrical energy from the external charging device to heat the fuel cell, such that the fuel cell is heated above the temperature threshold value; and controlling, when a detection result for the power battery is yes, the vehicle to obtain the electrical energy from the external charging device to heat the power battery, such that the power battery is heated above the temperature threshold value;
the vehicle controller configured for controlling, when the detection result is no or the battery has been heated above the temperature threshold value, the vehicle to enter the sleep mode comprises:
the vehicle controller being configured for controlling the vehicle to enter the sleep mode when following conditions are met: the detection result for the fuel cell is no or the fuel cell has been heated above the temperature threshold valu

Assignees

• Great Wall Motor Co Ltd

Inventors

• Zhou Mingwang
• Wu Maiqing
• Han Song

Classifications

• B60L58/34

  by heating · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02T90/40

  Application of hydrogen technology to transportation, e.g. using fuel cells · CPC title

• B60L58/27 Primary

  by heating · CPC title