Liquid cooling system and battery box using the same

Abstract

This application relates to the technical field of batteries, and more specifically, to a liquid cooling system and a battery box using the same. The liquid cooling system includes end bases and a heat dissipation unit, and the end bases are provided with a plurality of sequentially arranged liquid cooling plates, each having a liquid supply port tube and a liquid drain port tube that communicate with the heat dissipation unit, and a plurality of connecting tubes that connect adjacent liquid supply port tubes and liquid drain port tubes and are used to connect each liquid cooling plate in parallel. The two outermost end bases are each provided with a main liquid supply port and a main liquid drain port, and the main liquid supply port is connected to each of the liquid supply port tubes and is used to supply coolant into the heat dissipation unit, and the main liquid drain port is connected to each of the liquid drain port tubes and is used to drain the coolant from the heat dissipation unit.

Description

[Technical Field]

[0001] This application claims priority from a Chinese specification patent application bearing application number 2023224767170, filed with the China Patent Office on September 12, 2023, the entire contents of which are incorporated herein by reference. The present application relates to the technical field of batteries, and more particularly to a liquid cooling system and a battery box using the same. [Background technology]

[0002] In the related art, the mainstream battery cells include cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, among which cylindrical battery cells are widely used in electric vehicles due to their high energy density, high safety and stability, and low production costs.

[0003] Battery boxes for cylindrical batteries mainly use serpentine tube liquid cooling plates in contact with the sides of the battery core for heat management. Serpentine tube liquid cooling plates have a large contact area with the battery core and provide high cooling efficiency. In addition, liquid cooling systems using serpentine tube liquid cooling plates have a small pressure drop. Summary of the Invention [Problem to be solved by the invention]

[0004] The serpentine tube liquid cooling plate has a compact structure, making it difficult to design the connections of the liquid cooling system and ensuring reliability. Related technologies often involve expanding nylon tubes to connect them, but this method has relatively low grouping efficiency and poor reliability. [Means for solving the problem]

[0005] In a first aspect, the present application provides a method for manufacturing a semiconductor device comprising: a plurality of sequentially arranged liquid cooling plates each including an end base and a heat dissipation portion, the end base being provided with a liquid supply port tube and a liquid discharge port tube communicating with the heat dissipation portion; a plurality of connecting tubes used to connect adjacent liquid supply port tubes and liquid discharge port tubes to connect each liquid cooling plate in parallel; The two outermost end bases are each provided with a main liquid supply port and a main liquid drain port, the main liquid supply port is connected to each of the supply port tubes and is used to supply the cooling liquid into the heat dissipation section, and the main liquid drain port is connected to each of the drain port tubes and is used to drain the cooling liquid from the heat dissipation section, thereby providing a liquid cooling system.

[0006] In a second aspect, the present application provides a battery box using the above liquid cooling system. [Effects of the Invention]

[0007] A plurality of connecting tubes are provided to connect adjacent liquid supply port tubes and liquid drain port tubes, connecting each liquid cooling plate in parallel; and the two outermost end bases are each provided with a liquid supply main port and a liquid drain main port, and each liquid supply port tube is connected to supply the cooling liquid into the heat dissipation section, and each liquid drain port tube is connected to discharge the cooling liquid in the heat dissipation section, thereby connecting all of the liquid cooling plates in parallel. In this way, the flow resistance of the liquid cooling system is reduced while ensuring a reliable connection of each liquid cooling plate, and the uniformity of the liquid cooling flow rate is improved, resulting in a better liquid cooling effect of the liquid cooling system. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of an embodiment of a liquid cooling system of the present application. [Figure 2] 1 is an exploded view of an embodiment of a liquid cooling system of the present application. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. 2. [Figure 4] 2 is a schematic diagram of a connecting tube in an embodiment of a liquid cooling system of the present application. [Figure 5] 1 is an application diagram of an embodiment of the liquid cooling system of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0009] Example 1 As shown in FIGS. 1 to 5, the present application An embodiment of a liquid cooling system is provided, which includes a plurality of liquid cooling plates 1 arranged in sequence, each of which includes an end base 11 and a heat dissipation section 12, with the end base 11 provided with a liquid supply port tube 111 and a liquid drain port tube 112 that communicate with the heat dissipation section 12, and a plurality of connection tubes 2 that are used to connect adjacent liquid supply port tubes 111 and liquid drain port tubes 112 to connect each liquid cooling plate 1 in parallel, and the two outermost end bases 11 are each provided with a liquid supply main port 13 and a liquid drain main port 14, the liquid supply main port 13 communicating with each liquid supply port tube 111 and used to supply coolant into the heat dissipation section 12, and the liquid drain main port 14 communicating with each liquid drain port tube 112 and used to drain the coolant from the heat dissipation section 12.

[0010] According to the above configuration, all of the liquid cooling plates 1 are connected in parallel, thus ensuring a reliable connection between each liquid cooling plate 1, reducing the flow resistance of the liquid cooling system, improving the uniformity of the liquid cooling flow rate, and improving the liquid cooling effect of the liquid cooling system.

[0011] As shown in FIGS. 3 and 4, specifically, a female thread 21 is provided on the inner wall of the connection tube 2, and a first male thread is provided on the outer wall of the liquid supply port tube 111. The connection tube 2 connects adjacent liquid supply port tubes 111 by fitting the female thread 21 into the first male thread. This increases the connection strength between the connection tube 2 and the liquid supply port tube 111 and improves the reliability of the connection between the liquid cooling plates 1. More specifically, the female thread 21 is provided on the inner wall of each end of the connection tube 2, and in this case, the first male thread is provided on the outer wall of the end of the liquid supply port tube 111. This ensures connection reliability while reducing the number of threaded portions of the connection tube 2 and the liquid supply port tube 111, reducing processing costs and shortening the processing time.

[0012] In some embodiments, a second male thread is provided on the outer wall of the drain port tube 112, and the connecting tube 2 connects adjacent drain port tubes 112 by fitting the female thread 21 into the second male thread. This increases the connection strength between the connecting tube 2 and the drain port tube 112 and improves the reliability of the connection between each liquid cooling plate 1. In other embodiments, the female thread 21 is provided on the inner wall of both ends of the connecting tube 2, and in this case, the second male thread is provided on the outer wall of the end of the drain port tube 112. This ensures the reliability of the connection while reducing the number of threaded portions of the drain port tube 112, reducing processing costs and shortening the processing time.

[0013] In some embodiments, a semi-annular liquid cooling channel is formed in the heat dissipation unit 12, and both ends of the liquid cooling channel are connected to the liquid supply port tube 111 and the liquid discharge port tube 112, respectively. This allows the coolant to flow sufficiently inside the heat dissipation unit 12, improving the cooling effect on the heat dissipation unit 12. In some embodiments, the liquid cooling channel is arranged in the extension direction of the heat dissipation unit 12.

[0014] Because tolerances exist in the production of batteries and in the assembly of the liquid cooling system, the connection tubes 2 are configured as heat-melting tubes. The connection tubes 2 are deformed by heat melting and can be tightly fitted to the liquid supply port tubes 111 and / or the liquid drain port tubes 112. This allows the liquid cooling plate 1 and the batteries 3 between each liquid cooling plate 1 to be completely fitted together, filling gaps caused by tolerances, improving the compactness of the entire liquid cooling system structure, ensuring the reliability of the connections of the liquid cooling plates 1, and miniaturizing the entire liquid cooling system. During actual assembly, since the inner diameter of the connection tube 2 is equal to or greater than the outer diameters of the liquid supply port tube 111 and the liquid drain port tube 112, the connection tube 2 is first placed over one of the liquid supply port tube 111 and the liquid drain port tube 112 on one of the adjacent end bases 11, and then the liquid supply port tube 111 and the liquid drain port tube 112 on the other adjacent end base 11 are aligned with the liquid supply port tube 111 and the liquid drain port tube 112 that have been placed over with the connection tube 2 above. Finally, the connection tube 2 is moved to the center of the two liquid supply port tubes 111 and the center of the two liquid drain port tubes 112 to heat-melt the connection tube 2, thereby heat-melting one connection tube 2 and the two liquid supply port tubes 111 together, and heat-melting the other connection tube 2 and the two liquid drain port tubes 112 together.

[0015] In some embodiments, the liquid cooling plates 1 are distributed at equal intervals to leave mounting space for placing the batteries 3 between the liquid cooling plates 1. When the batteries 3 are cylindrical batteries, the heat dissipation portion 12 has a wavy projection in the horizontal plane so that the side surface of the heat dissipation portion 12 is in close contact with the battery 3, thereby improving the compactness of the internal structure of the liquid cooling system, increasing the cooling effect, and reducing the overall volume of the liquid cooling system.

[0016] In some embodiments, the liquid supply port tube 111 is higher than the liquid drain port tube 112 in the direction of gravity so that the coolant flows from top to bottom within the heat sink 12. This reduces the flow resistance of the liquid cooling system due to gravity, resulting in a higher liquid cooling effect.

[0017] The operation process of the above embodiment of the liquid cooling system will now be described by way of example. The coolant flows through the main liquid supply port 13 into each liquid supply port tube 111 in order, flows through the heat dissipation section 12 along the liquid cooling channel due to the action of gravity, and then flows through each liquid drainage port tube 112 to the main liquid drainage port 14 and is discharged, completing one cooling cycle. In actual use, the above process is repeated to cool the battery 3.

[0018] Example 2 Based on the same concept, the present application also discloses a battery box using the above liquid cooling system.

[0019] In addition, each embodiment in this specification is described in stages, and each embodiment is described focusing on the differences from other embodiments, and identical or similar parts between embodiments may be mutually referenced. [Explanation of symbols]

[0020] 1 Liquid cooling plate 11 End Base 111 Fluid supply port tube 112 Drainage port tube 12 Heat dissipation part 13 Main fluid supply port 14 Main drainage port 2 Connecting tubes 21 Female thread 3 batteries

Claims

1. 1. A liquid cooling system, comprising: a plurality of liquid cooling plates (1) arranged in sequence, each including an end base (11) and a heat dissipation portion (12), the end base (11) being provided with a liquid supply port tube (111) and a liquid discharge port tube (112) communicating with the heat dissipation portion (12); a plurality of connection tubes (2) used to connect adjacent liquid supply port tubes (111) and liquid discharge port tubes (112) to connect each of the liquid cooling plates (1) in parallel; The two outermost end bases (11) are each provided with a main liquid supply port (13) and a main liquid drain port (14), the main liquid supply port (13) is connected to each of the liquid supply port tubes (111) and is used to supply the cooling liquid into the heat dissipation section (12), and the main liquid drain port (14) is connected to each of the liquid drain port tubes (112) and is used to drain the cooling liquid from the heat dissipation section (12).

2. 2. The liquid cooling system of claim 1, wherein the inner wall of the connection tube (2) is provided with a female thread (21), the outer wall of the liquid supply port tube (111) is provided with a first male thread, and the connection tube (2) connects adjacent liquid supply port tubes (111) by engaging the female thread (21) with the first male thread.

3. 3. The liquid cooling system of claim 2, wherein the female thread (21) is provided on the inner wall of both ends of the connection tube (2), and / or the first male thread is provided on the outer wall of the end of the liquid supply port tube (111).

4. 3. The liquid cooling system of claim 2, wherein a second male thread is provided on the outer wall of the drain port tube (112), and the connecting tube (2) connects adjacent drain port tubes (112) by engaging the female thread (21) with the second male thread.

5. 5. The liquid cooling system of claim 4, wherein the female thread (21) is provided on an inner wall of each end of the connecting tube (2), and / or the second male thread is provided on an outer wall of an end of the drain port tube (112).

6. A liquid cooling system as described in any one of claims 1 to 5, wherein a semi-annular liquid cooling channel is formed within the heat dissipation section (12), and both ends of the liquid cooling channel are connected to the liquid supply port tube (111) and the liquid discharge port tube (112), respectively.

7. The liquid cooling system according to any one of claims 1 to 5, wherein at least one of the connection tubes (2) is configured as a thermally fused tube, and the connection tube (2) can be deformed by thermal fusion to adhere closely to the liquid supply port tube (111) and / or the liquid discharge port tube (112).

8. The liquid cooling system according to any one of claims 1 to 5, wherein each of the liquid cooling plates (1) is distributed at equal intervals to leave mounting space for placing batteries between each of the liquid cooling plates (1).

9. The liquid cooling system according to any one of claims 1 to 5, wherein the liquid supply port tube (111) is higher in the direction of gravity than the liquid discharge port tube (112) so that the cooling liquid flows from top to bottom within the heat dissipation section (12).

10. A battery box, A battery box using the liquid cooling system according to any one of claims 1 to 9.

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