Battery pack liquid cooling control method and device

A control method and battery pack technology, applied to secondary batteries, circuits, electrical components, etc., can solve the problems of large temperature fluctuations in the cooling process of the battery pack, inability to meet the different needs of water cooling temperature, and affecting the service life of the battery pack. To achieve the effect of prolonging life, prolonging service life and reducing energy consumption

Inactive Publication Date: 2020-12-01
JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to propose a control method for battery pack liquid cooling to solve the problem that the battery pack inlet water temperature and water pump speed are set to constant values ​​in the prior art battery pack liquid cooling process, which cannot meet the requirements of the battery pack liquid cooling process for water cooling temperature. The different needs of the battery pack lead to large temperature fluctuations in the cooling process of the battery pack, which affects the service life of the battery pack

Method used

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  • Battery pack liquid cooling control method and device
  • Battery pack liquid cooling control method and device
  • Battery pack liquid cooling control method and device

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Embodiment 1

[0044] Please refer to figure 1 and 2 , The first embodiment of the present invention provides a method for controlling liquid cooling of a battery pack, including steps S101-S104.

[0045] S101: Collect the working temperature of the battery pack and the temperature of the water inlet of the battery pack.

[0046] Wherein, during specific implementation, a plurality of temperature sensors can be arranged on the surface of the battery pack 50 to collect the working temperature of the battery pack, and the temperature sensor of the water inlet of the battery pack 50 can be used to collect the temperature of the coolant at the water inlet of the battery pack.

[0047] S102: Analyze and compare the collected operating temperature values ​​of multiple battery packs to obtain the maximum temperature value of the battery pack, and calculate the temperature rise rate of the battery pack, and then analyze and compare the temperature rise rate of the battery pack to obtain the maximum...

Embodiment 2

[0061] Please refer to image 3 , the second embodiment of the present invention provides a battery pack liquid cooling control device, including:

[0062] Acquisition module: collect the working temperature of the battery pack and the temperature of the water inlet of the battery pack.

[0063] Wherein, during specific implementation, a plurality of temperature sensors can be arranged on the surface of the battery pack 50 to collect the working temperature of the battery pack, and the temperature sensor of the water inlet of the battery pack 50 can be used to collect the temperature of the coolant at the water inlet of the battery pack.

[0064] Analysis and calculation module: analyze and compare the collected operating temperature values ​​of multiple battery packs to obtain the maximum temperature value of the battery pack, and calculate the temperature rise rate of the battery pack, and then analyze and compare the temperature rise rate of the battery pack to obtain the m...

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Abstract

The invention provides a battery pack liquid cooling control method and device. The method comprises the steps carrying out analysis and comparison on a plurality of collected battery pack working temperature values to obtain the highest temperature value of the battery pack, calculating the temperature rise rate of the battery pack, and carrying out analysis and comparison on the temperature riserate of the battery pack to obtain the maximum temperature rise rate of the battery pack; setting a battery pack inlet water temperature target value according to the difference between the battery pack maximum temperature value and a battery pack target temperature value; sending a battery pack cooling request, the battery pack inlet water temperature target value and a water pump rotating speedpreset value to an air conditioning system when the highest temperature value of the battery pack is greater than a cooling starting threshold value; and controlling the partial components of the airconditioning system and a battery pack liquid cooling unit to be started by the air conditioning system according to the battery pack cooling request so as to start battery pack cooling. According tothe invention, the method can effectively control the temperature of a battery pack, ensures that the temperature of the battery pack is basically constant, and prolongs the service life of the battery pack; and the rotating speed of a water pump is adjusted according to the maximum temperature rise rate of the battery pack, so that energy consumption is reduced.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a method and device for controlling liquid cooling of a battery pack. Background technique [0002] Electric vehicles have become the mainstream of new vehicles around the world, and the power source of electric vehicles is battery packs. The battery pack provides driving force for the vehicle, and its performance greatly affects the performance of the vehicle. Car battery packs must work within a certain temperature range in order to perform optimally. Working outside the temperature range will not only affect the discharge performance of the battery pack, shorten the life of the battery pack, but also reduce the safety factor of the battery pack. Therefore, the temperature control of the vehicle battery pack becomes an important issue. [0003] At present, the existing technology generally adopts two methods of heat dissipation for vehicle battery packs: air cooling and liquid coo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/6568H01M10/633H01M10/6569H01M10/6563H01M10/663
CPCH01M10/613H01M10/625H01M10/633H01M10/6563H01M10/6568H01M10/6569H01M10/663Y02E60/10
Inventor 刘建民沈祖英刘方震单丰武姜筱华
Owner JIANGXI JIANGLING GRP NEW ENERGY AUTOMOBILE CO LTD
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