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Working medium contact cooling system of power battery and its working method

A cooling system, contact technology, applied in the direction of batteries, secondary batteries, circuits, etc., can solve the problems of thermal resistance, flow resistance and uneven flow, difficult heat pipe circuit layout, large space occupation, etc., to achieve heat conduction efficiency Improve, improve heat conduction efficiency, high effective utilization effect

Active Publication Date: 2018-09-18
佛山久安储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (2) Install heat pipes in the battery system for indirect heat transfer: ① Rely on the liquid working medium circulating in the heat pipe to exchange heat with the heating battery. Although this method uses liquid working medium for heat transfer, the working medium and the battery are still For indirect contact, there are problems of thermal resistance, flow resistance and uneven flow, and the heat dissipation efficiency is low
②It is necessary to design the heat pipe circuit according to the arrangement of the batteries, the heat pipe circuit is difficult to arrange and takes up a lot of space

Method used

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  • Working medium contact cooling system of power battery and its working method
  • Working medium contact cooling system of power battery and its working method
  • Working medium contact cooling system of power battery and its working method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 The working medium contact cooling system of the power battery shown includes a high-power battery pack composed of several single batteries 1, an insulating liquid heat-conducting working medium 2, a nozzle 3, a spray branch pipe 4, a spray main pipe 5, and a working medium pump 6, filter 7 and working medium box 8,

[0038] The filter 7 ensures the purity of the heat-conducting working medium 2 of the insulating liquid, and prevents impurities from damaging the working medium pump 6 and blocking the nozzle 3 .

[0039] Insulating liquid and heat-conducting working medium 2 must use good insulating heat-conducting liquid working medium, such as various types of transformer oil, heat-conducting oil, etc., to ensure the insulation of the working medium and avoid contact with the high-power battery pack 1 to cause battery damage and System scrapped. The heat-conducting working medium 2 of the insulating liquid generally has a high thermal conductivity, ...

Embodiment 2

[0047] image 3 Another working fluid contact cooling system for a power battery is shown. The working fluid box 8 is provided with an air forced convection cooling structure: cooling fins 9 are installed on the outside of the working fluid box 8 , and several fans 10 are provided to blow the cooling fins 9 . Under the forced influence of external force, the air convects, and fresh air with a lower temperature is continuously blown in to exchange heat with the insulating liquid heat-conducting working medium 2 to realize cooling of the insulating liquid heat-conducting working medium 2 .

[0048] Such as Figure 4 As shown, the spray branch pipe 4 and the spray main pipe 5 form a rectangular frame.

Embodiment 3

[0050] Such as Figure 5 As shown, the working medium box 8 is provided with a water circulation cooling device: the evaporation working end 11 of the water circulation cooling device is immersed in the working medium box 8, the pipeline of the water circulation cooling device is provided with a water pump 13, and the cooling end 12 of the water circulation cooling device is carried out by a fan 10. Blast air to cool the high-temperature insulating liquid heat-conducting working medium 2 that is heat-exchanged and reflowed in the working medium box 8, and evaporate the water at the working end 11 to take the heat of the insulating liquid heat-conducting working medium 2 out to the heat-dissipating end 12 for heat dissipation. The water pump 13 circulates and continues to exchange heat with the heat-conducting working medium 2 of the insulating liquid.

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Abstract

Disclosed is a cooling system of a working medium contact type for a power battery. A working medium box is filled with an insulating liquid heat-conducting working medium; a working medium pump is sunk into the insulating liquid heat-conducting working medium; a filter is mounted at an inlet of the working medium pump; the working medium pump is connected to a main spray pipe; multiple branch spray pipes are connected to the main spray pipe in parallel; each of the branch spray pipes is provided with multiple nozzles; the nozzles are directed at a high-power battery pack. The branch spray pipes and the main spray pipe form a cage-shaped frame. The high-power battery pack is disposed in the cage-shaped frame, and the branch spray pipes are distributed on side faces and the upper part thereof so as to form a relatively open spray structure. The insulating liquid heat-conducting working medium is a non-polar substance and is free of phase changes in a spray process. Further disclosed is a working method of the cooling system of a working medium contact type for a power battery. The heat dissipation structure of the present invention is rational and the heat dissipation efficiency is high.

Description

technical field [0001] The invention relates to the technical field of cooling of power batteries, in particular to a working medium contact cooling system of a power battery and a working method thereof. Background technique [0002] With the implementation of the new energy strategy, electric vehicles are being popularized on a large scale, and lithium-ion power batteries are well used because of their excellent power output characteristics and long life. However, the performance of large-capacity and high-power lithium-ion batteries is sensitive to temperature changes. And in a limited space, the number of batteries used is relatively large. When the vehicle is running under different driving conditions, the battery will be discharged at different rates, and a large amount of heat will be generated at different heat generation rates. In addition to the accumulation of time and the influence of space, uneven heat accumulation will result, resulting in complex and changeab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/613H01M10/625H01M10/6568H01M10/6567H01M10/6569
CPCH01M10/613H01M10/625H01M10/6567H01M10/6568H01M10/6569H01M2220/20Y02E60/10
Inventor 王伟
Owner 佛山久安储能科技有限公司
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