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Vehicle and cooling method and device for power battery of vehicle

A technology of power battery and cooling method, which is applied in the field of vehicles, can solve the problems of not considering the influence of delayed battery, etc., and achieve the effects of reducing life attenuation and energy consumption, preventing untimely cooling, and excellent discharge capacity

Pending Publication Date: 2021-03-09
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two schemes directly test the battery temperature control, without taking into account the delay of sampling, the impact of the vehicle driving conditions and the environment on the battery

Method used

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  • Vehicle and cooling method and device for power battery of vehicle
  • Vehicle and cooling method and device for power battery of vehicle
  • Vehicle and cooling method and device for power battery of vehicle

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Embodiment Construction

[0040] 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.

[0041] This application is based on the inventor's understanding and research on the following issues:

[0042] In the related art, according to the temperature of the collected battery, the cooling is set to be turned on at a certain temperature under different SOCs, and the cooling is turned off at a certain temperature. It does not take into account the different heat generation characteristics of the battery under different working conditions, the driver's habits, ambient temperature, wind resistance, driving mode and driving...

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Abstract

The invention provides a vehicle and a cooling method and device for a power battery of the vehicle. The method comprises the following steps of obtaining the current driving working condition of thevehicle, the currently adopted driving mode and the target state of the current environment; determining an estimated temperature coefficient of a power battery in the vehicle according to the drivingworking condition, the driving mode and the target state; obtaining the current temperature of the power battery, and obtaining the estimated temperature of the power battery according to the currenttemperature and the estimated temperature coefficient; and performing cooling control on the power battery according to the estimated temperature. According to the cooling method disclosed by the invention, the power battery can be pre-estimated by combining the driving condition, the driving mode, the current temperature and the temperature of the power battery of the vehicle, and the battery isprevented from being cooled and controlled only according to the acquired temperature, so that the battery life attenuation and the energy consumption are reduced, and the battery discharge capacityis kept optimal; and the problem of untimely cooling caused by temperature acquisition lag and the phenomenon of thermal runaway caused by heating of the battery are prevented.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a cooling method for a power battery, a cooling device for a power battery and a vehicle with the cooling device for a power battery. Background technique [0002] At present, when cooling the battery, the cooling control of the power battery is usually carried out according to the temperature of the battery collected by the temperature collecting device. [0003] In the related art, it is proposed to compare the sensed battery temperature with a preset temperature threshold, adjust the battery temperature, and perform thermal management on the battery. The related technology also proposes a method of collecting the current temperature of the power battery; judging whether the current temperature of the power battery is greater than the preset threshold; if the current temperature is greater than the preset threshold, then obtain the target cooling amount according to the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/26H01M10/613H01M10/625H01M10/633H01M10/663
CPCB60L58/26H01M10/613H01M10/625H01M10/633H01M10/663B60L2240/545H01M2220/20Y02T10/70Y02E60/10
Inventor 张文玲刘建国张昱祥黄建陈明文
Owner BYD CO LTD
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