Stamping side edge liquid cooling system for large side face of lithium ion battery

Abstract

The utility model relates to the technical field of batteries, in particular to a stamping side edge liquid cooling system for a large side surface of a lithium ion battery. The system comprises a battery module, a liquid cooling plate assembly for ensuring the temperature difference of the battery module, a liquid cooling water inlet and outlet pipeline for cooling liquid to flow into or out of the battery module, and a liquid cooling machine for circulating the cooling liquid for cooling, the battery module comprises a plurality of uniformly arranged single battery cells, connecting strips for connecting the single battery cells and a battery fixing structure, the liquid cooling plate assemblies are arranged on the large side surfaces of each row of single battery cells, the liquid cooling water inlet and outlet pipelines are arranged on the liquid cooling plate assemblies, the liquid cooling machine is arranged outside the battery module, and the liquid cooling plate assemblies are arranged on the liquid cooling water inlet and outlet pipelines. And the liquid cooling water inlet and outlet pipeline is connected. Through the system, the lithium ion battery can be better cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a stamped side liquid cooling system for a large side surface of a lithium-ion battery. Background Art

[0002] Currently, in lithium-ion battery energy storage thermal management systems, liquid cooling systems primarily utilize a liquid cooling plate placed at the bottom of the battery cell. However, since the heat generated during charging and discharging is primarily concentrated on the pole side, and the warm airflow rises rather than converging at the bottom of the cell, the use of liquid cooling at the bottom of the cell is limited. In high-power, high-energy, and high-density applications, bottom-based liquid cooling systems not only struggle to maintain temperature differences within the battery pack, but also fail to guarantee the lifespan of the battery cell. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a stamped side liquid cooling system for the large side of a lithium-ion battery, through which the lithium-ion battery can be better dissipated.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A stamped side liquid cooling system for a large side of a lithium-ion battery, the system comprising:

[0006] Battery module; the battery module includes a plurality of evenly arranged single cells, connecting strips connecting the single cells, and a battery fixing structure;

[0007] Liquid cooling plate assembly, used to ensure the temperature difference of the battery module; the liquid cooling plate assembly is installed on the large side surface of each column of single cells;

[0008] Liquid cooling water inlet and outlet pipes, used for cooling liquid to flow into or out of the battery module; the liquid cooling water inlet and outlet pipes are connected to the liquid cooling plate assembly;

[0009] and a liquid cooler for circulating coolant to cool one or more battery modules; the liquid cooler is arranged outside the battery module and connected to the liquid cooling water inlet and outlet pipes.

[0010] Preferably, the liquid cooling plate assembly includes a stamped plate, a smooth liquid cooling plate, a thermally conductive adhesive pad, a liquid inlet nozzle and a liquid outlet nozzle; a groove is provided on one side of the stamped plate, and the side is connected to the smooth liquid cooling plate, the liquid inlet nozzle and the liquid outlet nozzle are arranged on both sides of the stamped plate and the smooth liquid cooling plate, and the thermally conductive adhesive pad is symmetrically provided in two groups and covers both sides of the stamped plate and the smooth liquid cooling plate; wherein, the liquid inlet nozzle and the liquid outlet nozzle are located outside the covering area, and the groove is connected to the liquid inlet nozzle and the liquid outlet nozzle.

[0011] Preferably, the liquid cooling area of a single liquid cooling plate assembly = the largest side area of a single row of single cells * the number of single row of single cells; the thickness of the stamped plate and the smooth liquid cooling plate in the liquid cooling plate assembly is 5-7 mm, preferably 5 mm.

[0012] Preferably, the stamped sheet is formed into a groove by stamping, and the stamping produces a flow bypass baffle, a spoiler column and a spoiler rib; there are several flow bypass baffles, each of which extends along the length direction of the stamped sheet, and the length of the flow bypass baffle is smaller than the length of the stamped sheet; the spoiler ribs are evenly distributed along the channel formed by the groove and the flow bypass baffle.

[0013] Preferably, the groove is formed by stamping a formed plate and sealing a smooth liquid cooling plate to form a liquid cooling area, and the liquid cooling area forms a double S-shaped liquid flow channel through a bypass baffle; a liquid inlet connected to the liquid inlet nozzle and a first collecting space are provided on the water inlet side of the liquid cooling area, and a liquid outlet connected to the liquid outlet nozzle and a second collecting space are provided on the water outlet side of the liquid cooling area.

[0014] Preferably, the liquid inlet nozzle and the liquid outlet nozzle are connected to the stamped plate and the smooth liquid cooling plate by welding, and the liquid inlet nozzle and the liquid outlet nozzle are connected to the liquid cooling inlet and outlet pipes by tooling extrusion.

[0015] Preferably, the smooth surface liquid cooling plate has a smooth surface structure, and the size of the smooth surface liquid cooling plate is consistent with that of the stamped plate.

[0016] Preferably, the thermally conductive adhesive pad is made of silicone material, and is adhered to the outer sides of the stamped plate and the smooth liquid cooling plate by adhesive.

[0017] Preferably, the spoiler ribs include linear spoiler ribs located on both sides of the groove and a first L-shaped spoiler rib and a second L-shaped spoiler rib symmetrically arranged near the liquid outlet.

[0018] In summary, the advantages of the present invention are as follows:

[0019] 1. This patent places the liquid cooling plate assembly on the large side of the single cell, which can provide more efficient battery thermal management;

[0020] 2. The structural design of the liquid cooling plate assembly enables the coolant flow to be evenly distributed, ensuring the overall temperature uniformity of the battery pack;

[0021] 3. Design appropriate liquid cooling plate flow channels to ensure that the flow resistance of the entire battery pack cooling system meets the usage scenario;

[0022] 4. The liquid cooling plate flow channel is made by stamping process, and the flow channel can be adjusted to make the heat dissipation temperature of the entire battery more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a battery according to an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the exploded structure of a battery according to an embodiment of the present application;

[0025] Figure 3 This is a structural diagram of the liquid cooling plate assembly and the position of the single battery cell according to an embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of a liquid cooling plate assembly and a thermally conductive pad according to an embodiment of the present application;

[0027] Figure 5 This is a schematic diagram of the flow channel structure of the liquid cooling plate assembly according to an embodiment of the present application;

[0028] Figure 6 This is a cross-sectional view of the liquid inlet and outlet nozzles, stamped plate, and smooth liquid cooling plate of the liquid cooling plate assembly of the embodiment of the present application;

[0029] Figure 7 This is a schematic diagram of the stamped plate structure of the liquid cooling plate assembly of an embodiment of the present application;

[0030] Figure 8 This is a cross-sectional view of a stamped plate of a liquid cooling plate assembly according to an embodiment of the present application;

[0031] Figure 9 This is a schematic diagram of the structure of a smooth liquid cooling plate of a liquid cooling plate assembly according to an embodiment of the present application;

[0032] Figure 10 This is a cross-sectional view of a smooth liquid cooling plate of a liquid cooling plate assembly according to an embodiment of the present application;

[0033] Figure numerals: 1. battery module; 2. liquid cooling plate assembly; 3. liquid cooling inlet and outlet pipes; 4. liquid cooling machine; 11. single battery cell; 21. stamped plate; 22. smooth liquid cooling plate; 23. thermal conductive pad; 24. liquid inlet nozzle; 25. liquid outlet nozzle; 26. groove; 261. flow bypass baffle; 262. spoiler column; 263. linear spoiler rib; 264. first L-shaped spoiler rib; 265. second L-shaped spoiler rib; 266. liquid inlet; 267. first collecting space; 268. liquid outlet; 269. second collecting space. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0036] It should also be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] The following is a detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings.

[0038] like Figures 1 to 10 The figure shows a liquid cooling system for the stamped side of a lithium-ion battery. The system includes: a battery module 1, a liquid cooling plate assembly 2 for maintaining a temperature difference within the battery module 1, liquid cooling inlet and outlet pipes 3 for flowing coolant into and out of the battery module 1, and a liquid cooler 4 for circulating the coolant to reduce the temperature. The liquid cooler 4 can cool multiple battery modules 1.

[0039] like Figure 1 and Figure 2 As shown, the battery module 1 includes several evenly arranged individual cells 11, connecting bars connecting the individual cells 11, and a battery mounting structure. The individual cells 11 can be arranged in one or more rows, with the liquid cooling plate assembly 2 installed on the large side surfaces (or both large side surfaces) of each row of individual cells 11. A liquid cooler 4 is located outside the battery module 1 and connected to the liquid cooling plate assembly 2 via liquid cooling inlet and outlet pipes 3.

[0040] like Figures 1 to 4 As shown, in this embodiment, a liquid cooling plate assembly 2 is arranged on the large side of each battery cell 11, which can realize double-sided heat exchange of the battery cell 11. Specifically, each liquid cooling plate assembly 2 is closely attached to the large side of four battery cells on one side for cooling the battery cell 11.

[0041] like Figure 1 and Figure 2As shown, the dimensions of the liquid cooling plate assembly 2 are determined by the area of the individual battery cells 11 in actual use and the number of individual battery cells 11 to be covered. The specific length and width of the liquid cooling plate assembly 2 must cover the large side surfaces of the individual battery cells 11. In other words, the liquid cooling area of a single liquid cooling plate assembly 2 = the large side surface area of a single row of individual battery cells 11 * the number of single row of individual battery cells 11. The thickness of the stamped sheet material 21 and the smooth liquid cooling sheet material 22 in the liquid cooling plate assembly 2 is 5-7 mm, preferably 5 mm.

[0042] like Figure 3 、 Figure 4 and Figure 6 As shown, the above-mentioned liquid cooling plate assembly 2 is made of 6063 aluminum alloy material, which includes a stamped plate 21, a smooth liquid cooling plate 22, a thermal conductive pad 23, a liquid inlet nozzle 24 and a liquid outlet nozzle 25; a groove 26 is provided on one side of the stamped plate 21, and the side is connected to the smooth liquid cooling plate 22, the liquid inlet nozzle 24 and the liquid outlet nozzle 25 are arranged on both sides of the stamped plate 21 and the smooth liquid cooling plate 22, and the thermal conductive pad 23 is symmetrically provided with two groups and covers both sides of the stamped plate 21 and the smooth liquid cooling plate 22; wherein, the liquid inlet nozzle (24) and the liquid outlet nozzle 25 are located outside (on both sides) of the covering area, and the groove 26 is connected to the liquid inlet nozzle 24 and the liquid outlet nozzle 25.

[0043] like Figure 9 and Figure 10 As shown, the smooth surface liquid cooling plate 22 has a smooth surface structure, and the size of the smooth surface liquid cooling plate 22 is consistent with that of the stamped plate 21 .

[0044] like Figure 3 and Figure 4 As shown, the thermal conductive adhesive pad 23 is made of silicone material and is adhered to the outer sides of the stamped plate 21 and the smooth liquid cooling plate 22 by adhesive. It can be used to reduce the gap between the liquid cooling plate assembly 2 and the battery cell and enhance the liquid cooling heat dissipation effect.

[0045] like Figures 5 to 8 As shown, the groove 26 is formed by stamping the stamped sheet material 21; this stamping produces a flow-circling baffle 261, a spoiler column 262, and spoiler ribs (including linear spoiler ribs 263 located on both sides of the groove 26, and a first L-shaped spoiler rib 264 and a second L-shaped spoiler rib 265 symmetrically positioned near the liquid outlet 268). The spoiler column 262, linear spoiler rib 263, first L-shaped spoiler rib 264, and second L-shaped spoiler rib 265 are used to increase the flow rate of the coolant, thereby accelerating the heat dissipation of the liquid cold plate.

[0046] Several flow baffles 261 are provided, each extending along the length of the stamped sheet material 21. Each flow baffle 261 is shorter than the length of the stamped sheet material 21. The ratio of the number of flow baffles 261 to the number of spoiler posts 262 is 1:2, and the ratio of the number of flow baffles 261 to the number of linear spoiler ribs 263 is 1:5. In this embodiment, the stamped sheet material 21 is provided with five flow baffles 261.

[0047] Specifically, such as Figure 5 As shown, the groove 26 is formed by the stamped sheet material 21 and the smooth liquid-cooling sheet material 22, forming a liquid cooling area. The liquid cooling area forms a double S-shaped liquid flow channel through the flow-circulating baffle 261. The water inlet side of the liquid cooling area is provided with a liquid inlet 266 connected to the liquid inlet nozzle 24 and a first flow collection space 267. The water outlet side of the liquid cooling area is provided with a liquid outlet 268 connected to the liquid outlet nozzle 25 and a second flow collection space 269.

[0048] Using a stamping process to create the liquid cooling plate flow channel can reduce the difficulty of flow channel production, thereby reducing production costs. At the same time, the flow channel shape can be adjusted based on thermal simulation results to make the heat dissipation temperature of the entire battery module 1 more uniform, thereby increasing the heat dissipation effect and achieving ideal heat dissipation.

[0049] The liquid cooling plate flow channel is connected to the liquid cooling inlet and outlet pipes 3 and the liquid cooling machine 4 through the liquid inlet nozzle 24 and the liquid outlet nozzle 25. When the connection is completed, the liquid cooling machine 4 can circulate the coolant and cool down. Among them, the liquid inlet nozzle 24 and the liquid outlet nozzle 25 are connected to the stamped plate 21 and the smooth liquid cooling plate (22) by welding, and the liquid inlet nozzle 24 and the liquid outlet nozzle 25 are also connected to the liquid cooling inlet and outlet pipes 3 by tooling extrusion.

[0050] The above-mentioned liquid cooling inlet and outlet water pipes 3 are made of plastic material, including water pipes between the inlet and outlet ports of the liquid cooler 4 and the liquid inlet nozzles 24 and the liquid outlet nozzles 25, water pipes between the liquid inlet nozzles 24 and the liquid outlet nozzles 25, and water pipes between the liquid outlet nozzles 25 and the liquid outlet nozzles 25.

[0051] like Figure 1 and 5 As shown in the figure, the coolant achieves battery thermal management through the following circulation process:

[0052] (1) The coolant flows out of the liquid cooler 4 and is filled into the liquid cooling plate assembly 2 on the battery module 1 along the liquid cooling water inlet and outlet pipes 3;

[0053] (2) The coolant flows into the liquid inlet 266 along the liquid inlet nozzle 24, fills the first collecting space 267 and flows into the multiple cooling channels in the length direction of the liquid cooling area;

[0054] (3) The coolant enters the upper S-shaped flow channel and the lower S-shaped flow channel respectively, and after flowing through a length, it is split in the opposite direction to realize S-shaped flow. After flowing through a length, it flows in the opposite direction again and converges in the second collecting space 269;

[0055] (4) The coolant flows from the second collecting space 269 through the liquid outlet 268 to the liquid outlet nozzle 25, and flows out of the battery pack along the liquid cooling inlet and outlet pipes 3 and enters the liquid cooling machine 4 for circulation.

[0056] The above is a description of the embodiments of the present invention. Through the above description of the disclosed embodiments, professional and technical personnel in the field can implement or use the present invention. Various modifications to these embodiments will be obvious to professional and technical personnel in the field. The general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stamped side liquid cooling system for a large side of a lithium-ion battery, characterized in that: The system includes: A battery module (1); the battery module (1) comprises a plurality of evenly arranged single cells (11), a connecting strip connecting the single cells (11), and a battery fixing structure; A liquid cooling plate assembly (2) is used to ensure a temperature difference of the battery module (1); the liquid cooling plate assembly (2) is installed on the large side surface of each column of single battery cells (11); Liquid cooling water inlet and outlet pipes (3) are used for cooling liquid to flow into or out of the battery module (1); the liquid cooling water inlet and outlet pipes (3) are connected to the liquid cooling plate assembly (2); and a liquid cooling machine (4) for circulating cooling liquid to cool one or more battery modules (1); the liquid cooling machine (4) is arranged outside the battery module (1) and connected to the liquid cooling water inlet and outlet pipes (3).

2. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 1, characterized in that: The liquid cooling plate assembly (2) comprises a stamped plate (21), a smooth liquid cooling plate (22), a thermally conductive adhesive pad (23), a liquid inlet nozzle (24) and a liquid outlet nozzle (25); a groove (26) is provided on one side of the stamped plate (21), and the side is connected to the smooth liquid cooling plate (22); the liquid inlet nozzle (24) and the liquid outlet nozzle (25) are arranged on both sides of the stamped plate (21) and the smooth liquid cooling plate (22); the thermally conductive adhesive pad (23) is symmetrically provided in two groups and covers both sides of the stamped plate (21) and the smooth liquid cooling plate (22); wherein the liquid inlet nozzle (24) and the liquid outlet nozzle (25) are located outside the covering area, and the groove (26) is communicated with the liquid inlet nozzle (24) and the liquid outlet nozzle (25).

3. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 2, characterized in that: The liquid cooling effect area of a single liquid cooling plate assembly (2) = the large side area of a single-row single-cell battery (11) * the number of single-row single-cell battery (11); the thickness of the stamped plate (21) and the smooth liquid cooling plate (22) in the liquid cooling plate assembly (2) is 5-7 mm.

4. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 3, characterized in that: The thickness of the punched plate (21) and the smooth liquid cooling plate (22) in the liquid cooling plate assembly (2) is 5 mm.

5. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 4, characterized in that: The stamped plate (21) is formed into a groove (26) by stamping, and the stamping produces a flow-circling baffle (261), a flow-disturbing column (262) and a flow-disturbing rib; a plurality of flow-circling baffles (261) are provided, and each flow-circling baffle (261) is extended along the length direction of the stamped plate (21), and the length of the flow-circling baffle (261) is less than the length of the stamped plate (21); the flow-disturbing ribs are evenly distributed along the channel formed by the groove (26) and the flow-circling baffle (261).

6. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 5, characterized in that: The groove (26) is formed by sealing a stamped plate (21) and a smooth liquid cooling plate (22) to form a liquid cooling area, and the liquid cooling area forms a double S-shaped liquid flow channel through a bypass baffle (261); a liquid inlet (266) connected to a liquid inlet nozzle (24) and a first collecting space (267) are provided on the water inlet side of the liquid cooling area, and a liquid outlet (268) connected to a liquid outlet nozzle (25) and a second collecting space (269) are provided on the water outlet side of the liquid cooling area.

7. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 6, characterized in that: The liquid inlet nozzle (24) and the liquid outlet nozzle (25) are connected to the stamped plate (21) and the smooth liquid cooling plate (22) by welding, and the liquid inlet nozzle (24) and the liquid outlet nozzle (25) are connected to the liquid cooling inlet and outlet pipes (3) by tooling extrusion.

8. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 3, characterized in that: The smooth surface liquid cooling plate (22) is a smooth surface structure, and the size of the smooth surface liquid cooling plate (22) is consistent with that of the stamped plate (21).

9. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 3, characterized in that: The thermally conductive adhesive pad (23) is made of silica gel material, and the thermally conductive adhesive pad (23) is adhered to the outer sides of the stamped plate (21) and the smooth liquid cooling plate (22) through adhesive backing.

10. The liquid cooling system for the stamped side of a lithium-ion battery according to claim 6, characterized in that: The spoiler ribs include linear spoiler ribs (263) located on both sides of the groove (26) and a first L-shaped spoiler rib (264) and a second L-shaped spoiler rib (265) symmetrically arranged near the liquid outlet (268).

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