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Liquid-cooled plate for battery, preparation method of liquid-cooled plate, battery module, battery pack and electric vehicle

A battery module and liquid cold plate technology, applied in the direction of secondary batteries, circuits, electrical components, etc., can solve the problems of insufficient welding seam connection and sealing strength, increase the manufacturing cost of the liquid cold plate, and affect the use of the liquid cold plate. Achieve the effects of saving stamping and forming steps, reducing forming costs, good connection strength and sealing performance

Active Publication Date: 2016-07-20
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the designed runners are different, different stamping dies need to be opened, which increases the manufacturing cost of the liquid cooling plate
In addition, the liquid cold plate will be subjected to high temperature during the existing welding process, and it is easy to deform after welding, which affects the use of the liquid cold plate
Moreover, the connection and sealing strength of the weld seam formed by the existing welding method is not enough

Method used

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  • Liquid-cooled plate for battery, preparation method of liquid-cooled plate, battery module, battery pack and electric vehicle
  • Liquid-cooled plate for battery, preparation method of liquid-cooled plate, battery module, battery pack and electric vehicle
  • Liquid-cooled plate for battery, preparation method of liquid-cooled plate, battery module, battery pack and electric vehicle

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Experimental program
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Effect test

preparation example Construction

[0037] The present invention also provides a method for preparing a battery liquid cold plate, the method comprising: placing the upper liquid cold plate and the lower liquid cold plate in parallel at intervals; welding the upper liquid cold plate and the lower liquid cold plate by electromagnetic pulse welding, welding The upper liquid cold plate deforms and connects with the lower liquid cold plate to form a connecting portion, and a flow channel is formed between two adjacent connecting portions.

[0038] According to the present invention, preferably, the distance between the two adjacent connecting parts is 3-30 mm.

[0039] According to the present invention, preferably, the gap between the intervals is 0.3-2mm.

[0040] According to the present invention, preferably, the two adjacent connecting parts are parallel.

[0041] According to the present invention, preferably, the welding energy of the electromagnetic pulse welding is 16-64KJ.

[0042] The invention also pro...

Embodiment 1

[0050] Put the upper liquid cold plate (copper material) and the lower liquid cold plate (aluminum alloy material) as figure 1Placed in parallel as shown in , with a gap of 2 mm, electromagnetic pulse welding (welding equipment model PS48-16 / 25, PST company) is applied on the upper liquid cold plate, and the welding energy is 16KJ to obtain the battery liquid cold plate. The structure after welding is as follows figure 2 , 3 As shown, the width of the connected part is 8mm, the width of the flow channel is 15mm, and the height is 2mm. The shape of the formed flow channel is Figure 4 As shown, the weight is 150g.

[0051] The obtained battery liquid cold plate was tested for connection strength and sealing performance, the connection strength was 400MPa, and the sealing strength was 0.01MPa.

[0052] Use a metallographic microscope to observe the structural morphology of the edge of the deformed part of the upper liquid cold plate and the part connected to the lower liquid...

Embodiment 2

[0054] Put the upper liquid cold plate (copper alloy material) and the lower liquid cold plate (aluminum material) as figure 1 Placed in parallel as shown in , with a gap of 1.5 mm, electromagnetic pulse welding is applied on the upper liquid cooling plate, and the welding energy is 20KJ to obtain a battery liquid cooling plate. The structure after welding is as follows figure 2 As shown, the width of the connected part is 10mm, the width of the flow channel is 20mm, and the height is 1.5mmm. The shape of the formed flow channel is Figure 5 As shown, the weight is 150g.

[0055] The obtained battery liquid cold plate was tested for connection strength and sealing performance, the connection strength was 300MPa, and the sealing strength was 0.02MPa.

[0056] Use a metallographic microscope to observe the structural morphology of the edge of the deformed part of the upper liquid-cooled plate and the part connected to the lower liquid-cooled plate. Figure 7 Similar as shown...

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Abstract

The invention discloses a liquid-cooled plate for a battery, a preparation method of the liquid-cooled plate, a battery module, a battery pack and an electric vehicle. The liquid-cooled plate comprises a lower liquid-cooled plate, a locally deforming upper liquid-cooled plate and a runner, wherein the runner is formed by surrounding of the upper liquid-cooled plate and the lower liquid-cooled plate through local deformation of the upper liquid-cooled plate; and the edge of a deformed part of the upper liquid-cooled plate is connected with the lower liquid-cooled plate in an atom binding manner. The liquid-cooled plate for the battery can have the advantages of being relatively light in weight, relatively simple in structure and relatively good in connection strength and sealing property, and can be obtained without a runner punch forming step.

Description

technical field [0001] The invention relates to a battery liquid cold plate and a preparation method thereof, a battery module, a battery pack, and an electric vehicle; in particular, it relates to a battery liquid cold plate, a method for preparing the battery liquid cold plate, and a battery produced by the method A battery liquid cold plate, a battery module, a battery pack including the battery module, and an electric vehicle including the battery pack. Background technique [0002] The battery liquid cold plate is an essential part of the battery pack, on which there are flow channels for cooling liquid flow and heat dissipation for the battery pack. [0003] At present, the manufacture of the battery liquid cold plate usually needs to stamp the upper liquid cold plate to form a flow channel, and then weld it with the lower liquid cold plate. When the designed runners are different, different stamping dies need to be opened, thereby increasing the manufacturing cost of...

Claims

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Application Information

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IPC IPC(8): H01M10/613H01M10/625H01M10/6567
CPCH01M10/6556H01M10/6568Y02E60/10
Inventor 郑卫鑫朱建华沈晞蒋露霞鲁志佩朱燕
Owner BYD CO LTD
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