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Method and system for determining battery temperature

A battery temperature and determination method technology, applied to secondary batteries, circuits, electrical components, etc., can solve problems such as inaccurate determination of battery temperature, achieve accurate display of battery temperature, reasonable handling and use, and avoid potential safety hazards.

Active Publication Date: 2021-01-12
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention aims to propose a battery temperature determination method to solve the problem that the prior art cannot accurately determine the battery temperature

Method used

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  • Method and system for determining battery temperature
  • Method and system for determining battery temperature

Examples

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no. 1 example

[0036] The first embodiment of the present invention discloses a method for determining battery temperature. The battery temperature determination method is used in electric vehicles. The battery is generally a power storage battery of an electric vehicle. Such as figure 1 As shown, the battery temperature determination method includes the following process:

[0037] Step S101: Receive the current frame battery temperature signal.

[0038] The battery of an electric vehicle has a complex structure, including multiple sensors for measuring temperature. Each sensor can signal the temperature of the battery. In this embodiment, multiple battery temperature signals are aggregated into three battery temperature signals, which respectively contain information about the average temperature, the highest temperature, and the lowest temperature. The battery temperature signal can be received via the CAN line. In addition, the battery temperature signal is generated and sent accordin...

no. 2 example

[0051] The second embodiment of the present invention discloses a method for determining battery temperature. The battery temperature determination method is used in electric vehicles. The battery is generally a power storage battery of an electric vehicle. Such as figure 2 As shown, the battery temperature determination method includes the following processes:

[0052] Step S201: Receive the current frame battery temperature signal.

[0053] Step S202: Obtain the average temperature, maximum temperature and minimum temperature of the battery in the current frame according to the battery temperature signal in the current frame.

[0054] Steps S201-S202 are the same as steps S101-S102, and will not be repeated here.

[0055] Step S203: comparing the average temperature of the battery in the current frame with the average temperature of the battery in the previous frame.

[0056] Through this step, the high-low relationship between the two is compared in order to determine...

no. 3 example

[0074] The third embodiment of the present invention discloses a method for determining battery temperature. The battery temperature determination method is used in electric vehicles. The battery is generally a power storage battery of an electric vehicle. Such as image 3 As shown, the battery temperature determination method includes the following process:

[0075] Step S301: Receive the current frame battery temperature signal.

[0076] Step S302: Obtain the average temperature, maximum temperature and minimum temperature of the battery in the current frame according to the battery temperature signal in the current frame.

[0077] Step S303: comparing the average temperature of the battery in the current frame with the average temperature of the battery in the previous frame.

[0078] Steps S301-S303 are the same as steps S201-S203, and will not be repeated here.

[0079] Step S304: If the average temperature of the battery in the current frame is lower than the averag...

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Abstract

The invention provides a battery temperature determining method and system for an electric vehicle. The battery temperature determining method includes the steps of receiving a temperature signal of abattery of a current frame; acquiring the average temperature, maximum temperature and minimum temperature of the battery of the current frame according to the temperature signal of the battery of the current frame; determining a change mode of the temperature of the battery according to a value relationship of the average temperature of the battery of the current frame and the average temperature of the battery of a previous frame; determining the temperature of the battery as the average temperature, maximum temperature or minimum temperature of the battery of the current frame according tothe change mode. By means of the battery temperature determining method and system, not only can the current temperature of the battery be accurately determined, but also the battery temperature signal can be reasonably processed and used.

Description

technical field [0001] The invention relates to the technical field of vehicle batteries, in particular to a method and system for determining battery temperature. Background technique [0002] As the country's efforts to control environmental pollution become stronger and stronger, the country's requirements for the average fuel consumption of vehicles are becoming more and more stringent, and pure electric vehicles have become the future development direction. The traction battery is the energy source of the pure electric vehicle, which supplies power to the power motor and the electrical system of the vehicle. Battery temperature is an important parameter of the power storage battery. If the temperature is too high or too low, it will affect the power output and charging speed of the battery. Since the interior of the traction battery is composed of multiple battery packs, the internal structure is very complicated, and there are dozens of sensors for measuring temperatu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/48
CPCH01M10/486H01M10/488Y02E60/10
Inventor 王乐乐王雅敬王国伟藏红涛
Owner GREAT WALL MOTOR CO LTD
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