Thermal management method and device of power battery

A power battery and heat management technology, applied in the direction of power devices, electric power devices, electrical devices, etc., can solve the problems of low control efficiency, power battery fire and explosion, etc., achieve more escape time, reduce the incidence rate, and lower the temperature Effect

Pending Publication Date: 2022-07-26
VOYAH AUTOMOBILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a thermal management method and device for a power battery, which solves the technical problem of low control efficiency of the thermal runaway of the power battery in the prior art, realizes efficient management and control of the thermal runaway of the power battery, and improves power The management and control efficiency of battery thermal runaway avoids fire and explosion of the power battery due to the expansion of thermal runaway of the power battery, effectively reduces the occurrence rate of thermal runaway safety incidents of the power battery, and ensures that passengers have more security in the event of a vehicle accident. Technical effects such as multiple escape times

Method used

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  • Thermal management method and device of power battery
  • Thermal management method and device of power battery
  • Thermal management method and device of power battery

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Embodiment 1

[0035] The first embodiment of the present invention provides a thermal management method for a power battery, such as figure 1 shown, including:

[0036] S101, after the whole vehicle is powered on, obtain the current temperature of the power battery 202 of the whole vehicle;

[0037] S102, judge the current temperature;

[0038] S103 , if the current temperature is not less than the temperature threshold of the power battery 202 , disconnect the power supply circuit of the power battery 202 , and supply power to the water pump 203 of the vehicle through the battery 206 of the vehicle to control the water pump 203 to be in a running state.

[0039] The thermal management method of the power battery in this embodiment is applied to the vehicle controller VCU (Vehicle control unit) 201 of the thermal management system of the vehicle. like figure 2 As shown, the thermal management system includes a vehicle controller VCU 201 , a power battery 202 , a water pump 203 , a water...

Embodiment 2

[0056] Based on the same inventive concept, the second embodiment of the present invention also provides a thermal management device for a power battery, such as image 3 shown, including:

[0057] The obtaining module 301 is used for obtaining the current temperature of the power battery of the whole vehicle after the whole vehicle is powered on;

[0058] The judgment module 302 is used for judging the current temperature;

[0059] The control module 303 is used to disconnect the power supply circuit of the power battery if the current temperature is not less than the temperature threshold of the power battery, and supply power to the water pump of the vehicle through the battery of the vehicle, and control the The water pump is running.

[0060] As an optional embodiment, the control module 303 is used for:

[0061] If the current temperature is less than the temperature threshold, continue to acquire the current temperature.

[0062] As an optional embodiment, the contr...

Embodiment 3

[0071] Based on the same inventive concept, a third embodiment of the present invention also provides a vehicle, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the program when the processor executes the program The steps of any one of the above methods for thermal management of power batteries.

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Abstract

The invention relates to the technical field of new energy vehicles, in particular to a thermal management method of a power battery, which comprises the following steps: after a whole vehicle is electrified, acquiring the current temperature of the power battery of the whole vehicle; the current temperature is judged; and if the current temperature is not smaller than the temperature threshold value of the power battery, a power supply loop of the power battery is disconnected, power is supplied to a water pump of the whole vehicle through a storage battery of the whole vehicle, and the water pump is controlled to be in a running state. According to the method, the thermal runaway of the power battery is efficiently managed and controlled, the management and control efficiency of the thermal runaway of the power battery is improved, fire and explosion of the power battery caused by expansion of the thermal runaway of the power battery are avoided, and the occurrence rate of thermal runaway safety events of the power battery is effectively reduced; and it is ensured that passengers have more escape time when an accident happens to the whole vehicle.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a thermal management method and device for a power battery. Background technique [0002] With the development of new energy vehicles, more and more attention has been paid to the safety of lithium batteries of their power batteries. Among them, the prevention of thermal runaway expansion of power batteries is a top priority. At present, the requirement of the national standard GB38031-2020 for thermal runaway extended safety events is that the time from the loss of control of the cells of the power battery to the time when an open flame is seen outside the battery pack is greater than 5 minutes. In order to meet this requirement, the existing solution will use a certain thermal insulation method to isolate the energy released by the runaway battery cells, so as to solve the thermal runaway expansion safety incident of the power battery. [0003] However, the energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K1/00B60K11/02B60L58/26B60L3/00H01M10/633H01M10/625H01M10/613H01M10/655H01M10/6568
CPCB60K1/00B60K11/02B60L58/26B60L3/0046H01M10/633H01M10/625H01M10/613H01M10/655H01M10/6568B60K2001/005
Inventor 刘凯黄敏刘振勇沈健金兆鑫
Owner VOYAH AUTOMOBILE TECH CO LTD
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