Manufacturing method of parallel water cooling disc assembly of lithium battery

Abstract

The invention discloses a manufacturing method of a parallel water cooling disc assembly of a lithium battery. The manufacturing method comprises the following steps: (1) preparing N aluminum flat pipes; (2) two collecting pipes are prepared, each collecting pipe comprises a composite aluminum pipe, each composite aluminum pipe comprises an inner-layer plate and an outer-layer plate compounded on the outer wall of the inner-layer plate, and the melting point of the outer-layer plate is lower than that of the inner-layer plate; (3) preassembly is conducted, specifically, the two ends of each of N aluminum flat pipes are inserted into the corresponding mounting hole in the corresponding collecting pipe, a brazing filler metal piece is clamped between every two adjacent aluminum flat pipes, and a component assembly is manufactured; and (4) brazing is conducted, specifically, the component assembly is placed in a brazing furnace, brazing is completed, and the parallel water cooling disc assembly is manufactured. According to the parallel flow water-cooling disc assembly manufactured by the invention, the aluminum flat pipe has a flat outer surface, so that the contact area with a lithium battery can be increased, the heat exchange efficiency is improved, the wall thickness of the aluminum flat pipe is relatively thin, heat transfer is facilitated, and the heat exchange efficiency of the parallel flow water-cooling disc assembly is about three times higher than that of a plate type water-cooling plate assembly.

Description

technical field [0001] The invention relates to a method for manufacturing a parallel flow water cold plate assembly of a lithium battery. Background technique [0002] At present, the water-cooled base for water-cooled lithium battery cooling uses a plate-type water-cooled plate assembly. see figure 1 and figure 2 , this plate-type water-cooled plate assembly is to place the aluminum plate in the mold, blow it with high-pressure air, make the aluminum plate follow the shape of the mold, and make a water-cooled plate 101 with curved grooves, and then stack the two water-cooled plates 101 Brazing is performed together, and a flow channel 103 is formed between the opposite grooves, and then the liquid inlet pipe 110 and the liquid outlet pipe 120 are respectively installed at both ends of the flow channel, so that a plate-type water-cooled plate for a lithium battery is made Total 100. [0003] This plate-type water-cooled plate assembly has significant defects. 1. The th...

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Problems solved by technology

[0003] This plate-type water-cooled plate assembly has significant defects. 1. The thickness of the aluminum plate needs to be at least 1mm, and the manufacturing cost is relatively high, and the thicker aluminum plate also leads to a longer heat transfer distance, so the heat transfer efficiency is lower

2. Due to the unevenness of the upper surface of the plate-type water-cooled plate assembly, the contact surface between its upper surface and the lithium battery is small (generally only about 80%), which also reduces its heat exchange efficiency

4. The inner surface area of ​​the plate-type water-cooled plate assembly is generally only 1.5 times the area of ​​the water-cooled base, and the heat transfer efficiency is too low

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