A heat dissipation device for energy storage battery module

Abstract

The present invention belongs to the technical field of heat dissipation of battery modules, and specifically relates to a heat dissipation device for an energy storage battery module, which includes a fixed component, a plurality of battery cells and an infusion component, wherein the fixed component includes a frame plate, and the infusion component includes a liquid delivery tube and an infusion tube, a heat dissipation frame is installed inside the frame plate, and a liquid delivery port and an infusion port are installed on the heat dissipation frame, and the liquid delivery port and the infusion port are respectively connected to the liquid delivery tube and the infusion tube; a heat dissipation component is installed on the heat dissipation frame, and a limit column is installed on the heat dissipation component, and the limit column abuts against the side wall of the battery cell. The invention seals and connects two adjacent battery cells to the frame plate through a sealing gasket on the frame plate, and a sealed cavity is formed between the two battery cells. If coolant is passed into the heat dissipation frame at this time, the sealed cavity can effectively prevent the cold air from escaping, thereby improving the heat dissipation efficiency of the heat dissipation frame; if the battery cell bulges, the heat dissipation frame in a frame shape can provide an escape space for the battery cell, thereby effectively preventing the battery cell bulging from damaging the battery pack.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat dissipation of battery modules, and in particular relates to a heat dissipation device for an energy storage battery module. Background Art

[0002] As the core component of new energy vehicles, the speed of industrial development and technological progress of power batteries directly affects the popularization and development of new energy vehicles. The battery pack of its power battery is composed of several battery modules in parallel, and each battery module is composed of several battery cells in series. During the operation of the power battery, heat is generated inside, so an efficient heat dissipation device is required to dissipate the heat of the battery module.

[0003] The heat dissipation method of the battery module in the prior art is mainly to install a heat dissipation structure between two battery cells for heat dissipation. Common heat dissipation structures include air cooling and liquid cooling. For example, the Chinese patent with publication number CN216624402U mainly installs a heat dissipation structure between two adjacent battery cells, and sets a heat dissipation groove to reserve expansion and deformation space for the battery cell during long-term repeated charging and discharging. This solution has the following technical problems: Since the above-mentioned heat dissipation groove is opened through, the purpose is to reserve expansion and deformation space for the battery cell during long-term repeated charging and discharging. However, when the battery cell is actually bulging, it is often the center of the battery cell that starts to bulge. The heat dissipation groove opened through cannot effectively reserve expansion space for the battery cell. When the battery bulges, it will also squeeze the heat dissipation groove, reducing the heat dissipation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a heat dissipation device for an energy storage battery module to solve the technical problems in the prior art in view of the shortcomings of the prior art.

[0005] The object of the present invention can be achieved by the following technical scheme: a heat dissipation device for an energy storage battery module, comprising a fixing assembly, a plurality of battery cells and an infusion assembly, wherein the fixing assembly comprises a frame plate, two adjacent battery cells are sealed and connected by the frame plate, end plates 1 and 2 are respectively installed at the head and tail ends of the plurality of battery cells, the end plates 1 and 2 are fixed to the plurality of battery cells by cable ties, and the plurality of battery cells are connected in series by series aluminum bars;

[0006] The infusion assembly comprises a liquid delivery tube and an infusion tube, a heat dissipation frame is installed inside the frame plate, a liquid delivery port and an infusion port are installed on the heat dissipation frame, and the liquid delivery port and the infusion port are connected to the liquid delivery tube and the infusion tube respectively;

[0007] The heat dissipation frame is provided with a heat dissipation component, and the heat dissipation component is provided with a limiting column, and the limiting column abuts against the side wall of the battery core.

[0008] As a further optimization or improvement of the present solution, a sealing gasket is installed on the frame plate, and the frame plate is connected to the battery cell via the sealing gasket.

[0009] As a further optimization or improvement of the present solution, the frame plate is provided with wing plates, and the battery cells are inserted into the wing plates; during the installation of the battery cells, the battery cells are inserted between the wing plates on both sides of the frame plate and pressed against the sealing gasket.

[0010] As a further optimization or improvement of the present solution, a reinforcing rib is installed at one end of the frame plate close to the liquid delivery port and the infusion port.

[0011] As a further optimization or improvement of the present solution, the heat dissipation assembly includes a heat dissipation plate, reinforcing ribs and a rotating head. The heat dissipation plate is connected to the heat dissipation frame. Reinforcing ribs are arranged inside the heat dissipation plate. The reinforcing ribs separate the heat dissipation plate into a liquid inlet cavity and a liquid outlet cavity. A mounting ring is installed at the bottom of the heat dissipation plate. Two rotating heads are rotatably installed on both sides of the mounting ring. Infusion heads are installed inside the rotating heads, and the liquid inlet cavity and the liquid outlet cavity are connected through the infusion head.

[0012] As a further optimization or improvement of this solution, the infusion head is connected by a metal hose and a connecting pipe respectively, and two heat transfer plates are respectively installed at both ends of the mounting ring. The two heat transfer plates are respectively located on both sides of the connecting pipe, one end of the heat transfer plate is in contact with the side wall of the battery cell, and the other end of the heat transfer plate is connected to the push block through a diaphragm, and the push block contacts the connecting pipe.

[0013] As a further optimization or improvement of the present solution, plugs are installed on both the liquid delivery tube and the infusion tube.

[0014] Beneficial effects of the present invention:

[0015] (1) In the present invention, two adjacent battery cells are sealed and connected to the frame plate through a sealing gasket on the frame plate. At this time, a sealed cavity is formed between the two battery cells. If coolant is passed through the heat dissipation frame at this time, the sealed cavity can effectively prevent cold air from escaping, thereby improving the heat dissipation efficiency of the heat dissipation frame; if the battery cell bulges, the frame-shaped heat dissipation frame can provide an escape space for the battery cell, effectively preventing the battery cell bulging from damaging the battery pack.

[0016] (2) The present invention inserts the battery cell between the wing plates on both sides of the frame plate and presses against the sealing gasket and the limiting pillar. If the battery cell bulges, the limiting pillar will resist the battery cell, effectively limiting the tendency of the battery cell bulging and reducing the harm of the battery cell bulging to the battery pack. At the same time, the reinforcing ribs inside the heat sink will support the limiting pillar to prevent the heat sink from being deformed due to the bulging of the battery cell.

[0017] (3) In the process of assembling the battery cells of the present invention, two adjacent battery cells are attached to the two ends of the heat transfer plate. If one of the battery cells is seriously heated, the heat of the side wall of the battery cell is transferred to the heat transfer plate. At this time, the cavity inside the heat transfer plate expands and drives the diaphragm and the push block to move, so that the push block drives the infusion head to rotate toward the battery cell with serious heating. In the process of the coolant in the liquid inlet cavity entering the liquid outlet cavity through the infusion head, since the infusion head rotates toward the battery cell with serious heating, the coolant inside the heat sink near the end of the battery cell with serious heating will first flow through the infusion head. At this time, the cooling efficiency of the heat sink near the end of the battery cell with serious heating is improved. Therefore, the heat sink can focus on dissipating heat on the battery cell with serious heating first, so that the battery cell can quickly approach the normal temperature, effectively avoiding local heating of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 Schematic diagram of the connection structure between the frame plate and the battery cell.

[0021] Figure 3 Schematic diagram of the frame plate structure.

[0022] Figure 4 This is the coordination diagram between the frame plate and the heat dissipation frame structure.

[0023] Figure 5 It is a cross-sectional view of the heat dissipation frame structure.

[0024] Figure 6 This is a schematic diagram of the infusion head structure.

[0025] Figure 7 This is the connection diagram between the heat transfer plate and the push block.

[0026] The following are marked in the figure: 1. Fixed assembly; 11. End plate 1; 12. Cable tie; 13. End plate 2; 14. Frame plate; 141. Sealing pad; 142. Reinforcing rib; 143. Wing plate; 2. Battery cell; 3. Infusion assembly; 31. Liquid delivery tube; 32. Liquid delivery tube; 33. Plug; 34. Liquid delivery port; 35. Infusion port; 36. Heat dissipation frame; 4. Series aluminum row; 5. Heat dissipation assembly; 51. Heat dissipation plate; 52. Reinforcing ribs; 53. Mounting ring; 54. Infusion head; 55. Metal hose; 56. Connecting pipe; 57. Rotating head; 58. Push block; 59. Diaphragm; 510. Heat transfer plate; 511. Liquid inlet cavity; 512. Liquid outlet cavity; 6. Limiting column. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 4 A heat dissipation device for an energy storage battery module, comprising a fixing assembly 1, a plurality of battery cells 2 and an infusion assembly 3, wherein the fixing assembly 1 comprises a frame plate 14, two adjacent battery cells 2 are sealed and connected by the frame plate 14, end plates 11 and 13 are respectively installed at the head and tail ends of the plurality of battery cells 2, the end plates 11 and 13 are fixed to the plurality of battery cells 2 by tie bands 12, and the plurality of battery cells 2 are connected in series by series aluminum bars 4;

[0029] The infusion assembly 3 includes a liquid feeding tube 31 and an infusion tube 32. A heat dissipation frame 36 is installed inside the frame plate 14. A liquid feeding port 34 and an infusion port 35 are installed on the heat dissipation frame 36. The liquid feeding port 34 and the infusion port 35 are connected to the liquid feeding tube 31 and the infusion tube 32 respectively.

[0030] The heat dissipation frame 36 is provided with a heat dissipation assembly 5 , and the heat dissipation assembly 5 is provided with a limiting column 6 , which abuts against the side wall of the battery cell 2 .

[0031] It should be noted that the heat dissipation component 5 is located between two adjacent battery cores 2 , and when the coolant passes through the heat dissipation component 5 , the heat dissipation component 5 can dissipate heat from the side surfaces of the two adjacent battery cores 2 .

[0032] Specifically, a sealing gasket 141 is installed on the frame plate 14 , and the frame plate 14 is connected to the battery cell 2 via the sealing gasket 141 .

[0033] Specifically, plugs 33 are installed on both the liquid delivery tube 31 and the liquid infusion tube 32 .

[0034] It should be noted that when assembling the battery cells 2, several battery cells 2 are respectively inserted between the wing plates 143 on both sides of the frame plate 14 and close to the sealing gasket 141. At this time, two adjacent battery cells 2 are sealed and connected to the frame plate 14 through the sealing gasket 141 on the frame plate 14. At this time, the heat dissipation frame 36 in the frame plate 14 is located between the two battery cells 2. Then, the end plate 11 and the end plate 2 13 are connected to the head and tail ends of several battery cells 2, and the cable ties 12 are used to fix several battery cells 2. Finally, the delivery tube 31 and the infusion tube 32 on the infusion assembly 3 are connected to the delivery port 34 and the infusion port 35 respectively.

[0035] Since the two adjacent battery cells 2 are sealed and connected to the frame plate 14 through the sealing gasket 141 on the frame plate 14, a sealed cavity is formed between the two battery cells 2. Since the heat dissipation frame 36 is located in the sealed cavity, if the heat dissipation frame 36 is passed through the heat dissipation frame 36 at this time, the sealed cavity can effectively prevent the cold air from escaping, so that the coolant can continuously dissipate the heat from the battery cell 2, thereby improving the heat dissipation efficiency of the heat dissipation frame 36. If the battery cell 2 bulges, the frame-shaped heat dissipation frame 36 can provide an escape space for the battery cell 2, thereby effectively preventing the battery cell 2 from bulging and damaging the battery pack.

[0036] It should be noted that a limiting column 6 is installed on the heat dissipation assembly 5. When the battery cell 2 is assembled, the battery cell 2 is inserted between the wing plates 143 on both sides of the frame plate 14 and is close to the sealing gasket 141 and the limiting column 6. If the battery cell 2 bulges, the limiting column 6 will resist the battery cell 2, thereby effectively limiting the tendency of the battery cell 2 to bulge and reducing the harm of the bulging of the battery cell 2 to the battery pack. At the same time, the reinforcing ribs 52 inside the heat dissipation plate 51 will support the limiting column 6 to prevent the bulging of the battery cell 2 from squeezing the heat dissipation plate 51 and deforming it.

[0037] See also Figure 2-Figure 4 The frame plate 14 is provided with wing plates 143 , and the battery cell 2 is inserted into the wing plates 143 . During installation of the battery cell 2 , the battery cell 2 is inserted between the wing plates 143 on both sides of the frame plate 14 and is pressed against the sealing gasket 141 .

[0038] It should be noted that the wing plates 143 on both sides of the frame plate 14 can facilitate the installation and removal of the battery cells 2 . At the same time, the wing plates 143 can also play a positioning role in the installation of the battery cells 2 . Therefore, the wing plates 143 play a vital role in the installation and removal of the battery cells 2 .

[0039] See also Figure 3-Figure 4 A reinforcing rib 142 is installed at one end of the frame plate 14 close to the liquid delivery port 34 and the infusion port 35.

[0040] It should be noted that the reinforcing ribs 142 can improve the bending strength of the frame plate 14 and protect the pipe openings of the liquid delivery port 34 and the liquid infusion port 35 .

[0041] See also Figure 5-Figure 7 The heat dissipation assembly 5 includes a heat dissipation plate 51, a reinforcing rib 52 and a rotating head 57. The heat dissipation plate 51 is connected to the heat dissipation frame 36. The heat dissipation plate 51 is provided with a reinforcing rib 52. The reinforcing rib 52 separates the heat dissipation plate 51 into a liquid inlet cavity 511 and a liquid outlet cavity 512. A mounting ring 53 is installed at the bottom of the heat dissipation plate 51. Two rotating heads 57 are rotatably installed on both sides of the mounting ring 53. Infusion heads 54 are installed inside the rotating heads 57. The liquid inlet cavity 511 and the liquid outlet cavity 512 are connected through the infusion heads 54.

[0042] Specifically, the infusion head 54 is connected to the connecting tube 56 through a metal hose 55, and two heat transfer plates 510 are installed at both ends of the mounting ring 53. The two heat transfer plates 510 are respectively located on both sides of the connecting tube 56. One end of the heat transfer plate 510 contacts the side wall of the battery cell 2, and the other end of the heat transfer plate 510 is connected to the push block 58 through a diaphragm 59, and the push block 58 contacts the connecting tube 56.

[0043] It should be noted that if the BMS voltage balancing function in the battery management system of the power battery fails, the battery management system cannot effectively control the voltage balancing between the battery cells, which will cause local heating of the battery module. In addition, inaccurate temperature monitoring in the battery management system will also cause local heating of the battery module. The local heating of the battery module is caused by the serious heating of some battery cells 2. The heat dissipation device of the prior art is difficult to accurately and effectively dissipate the heat of the seriously heated battery cells 2, resulting in the inability of the existing heat dissipation device to dissipate the local heat of the battery module.

[0044] Therefore, in the present invention, the limiting pillars 6 are located between two adjacent battery cells 2 , so that during the process of assembling the battery cells 2 , the two adjacent battery cells 2 are attached to the two ends of the heat transfer plate 510 .

[0045] During use, if one of the battery cells 2 is seriously heated, the heat of the side wall of the battery cell 2 is transferred to the heat transfer plate 510. At this time, the cavity inside the heat transfer plate 510 expands, driving the diaphragm 59 to bulge. Figure 6 At this time, the diaphragm 59 drives the push block 58 to push the connecting tube 56 to move, and then the connecting tube 56 drives the rotating head 57 and the infusion head 54 to rotate toward the battery cell 2 with severe heating through the metal hose 55. In the process of the coolant in the liquid inlet cavity 511 entering the liquid outlet cavity 512 through the infusion head 54, since the infusion head 54 rotates toward the battery cell 2 with severe heating, the coolant in the heat sink 51 close to the battery cell 2 with severe heating will first flow through the infusion head 54 to accelerate the flow. At this time, the cooling efficiency of the end of the heat sink 51 close to the battery cell 2 with severe heating is improved, so the heat sink 51 can focus on cooling the battery cell 2 with severe heating first, so that the battery cell 2 can quickly reach the normal temperature and avoid local heating of the battery module.

[0046] The implementation principle of the present invention is:

[0047] When assembling the battery cells 2, several battery cells 2 are respectively inserted between the wing plates 143 on both sides of the frame plate 14 and are close to the sealing gasket 141 and the limiting column 6, wherein two adjacent battery cells 2 are close to the two ends of the heat transfer plate 510. At this time, the heat dissipation frame 36 in the frame plate 14 is located between the two battery cells 2. Then, the end plate 11 and the end plate 2 13 are connected to the head and tail ends of several battery cells 2, and the cable ties 12 are used to fix several battery cells 2. Finally, the liquid delivery tube 31 and the infusion tube 32 on the infusion component 3 are connected to the liquid delivery port 34 and the infusion port 35 respectively. The two adjacent battery cells 2 are sealed and connected to the frame plate 14 through the sealing gasket 141 on the frame plate 14, so that a sealed cavity is formed between the two battery cells 2. If the heat dissipation frame 36 is filled with coolant at this time, the sealed cavity can effectively prevent the cold air from escaping, so that the coolant can dissipate the heat of the battery cells 2 to the maximum extent, thereby improving the heat dissipation efficiency of the heat dissipation frame 36. If the battery cell 2 bulges, the frame-shaped heat dissipation frame 36 can provide an escape space for the battery cell 2, thereby effectively preventing the battery cell 2 from bulging and damaging the battery pack.

[0048] During use, if one of the battery cells 2 is seriously heated, the heat of the side wall of the battery cell 2 is transferred to the heat transfer plate 510. At this time, the cavity inside the heat transfer plate 510 expands, driving the diaphragm 59 to bulge. Figure 6 At this time, the diaphragm 59 drives the push block 58 to push the connecting tube 56 to move, and then the connecting tube 56 drives the rotating head 57 and the infusion head 54 to rotate toward the battery cell 2 with severe heating through the metal hose 55. In the process of the coolant in the liquid inlet cavity 511 entering the liquid outlet cavity 512 through the infusion head 54, since the infusion head 54 rotates toward the battery cell 2 with severe heating, the coolant in the heat sink 51 close to the battery cell 2 with severe heating will first flow through the infusion head 54 to accelerate the flow. At this time, the cooling efficiency of the end of the heat sink 51 close to the battery cell 2 with severe heating is improved, so the heat sink 51 can focus on cooling the battery cell 2 with severe heating first, so that the battery cell 2 can quickly reach the normal temperature and avoid local heating of the battery module.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A heat dissipation device for an energy storage battery module, characterized in that: It includes a fixing assembly, a plurality of battery cells and an infusion assembly, wherein the fixing assembly includes a frame plate, two adjacent battery cells are sealed and connected by the frame plate, end plates 1 and 2 are respectively installed at the head and tail ends of the plurality of battery cells, the end plates 1 and 2 are fixed to the plurality of battery cells by cable ties, and the plurality of battery cells are connected in series by series aluminum bars; The infusion assembly includes a liquid delivery tube and an infusion tube, a heat dissipation frame is installed inside the frame plate, a liquid delivery port and an infusion port are installed on the heat dissipation frame, and the liquid delivery port and the infusion port are connected to the liquid delivery tube and the infusion tube respectively; A heat dissipation component is installed on the heat dissipation frame, and a limiting column is installed on the heat dissipation component, and the limiting column abuts against the side wall of the battery cell; The heat dissipation assembly includes a heat dissipation plate, a reinforcing rib and a rotating head. The heat dissipation plate is connected to the heat dissipation frame. The heat dissipation plate is provided with a reinforcing rib. The reinforcing rib divides the heat dissipation plate into a liquid inlet cavity and a liquid outlet cavity. A mounting ring is installed at the bottom of the heat dissipation plate. Two rotating heads are rotatably installed on both sides of the mounting ring. Infusion heads are installed inside the rotating heads. The liquid inlet cavity and the liquid outlet cavity are connected through the infusion heads. The infusion head is connected via a metal hose and a connecting pipe respectively. Two heat transfer plates are respectively installed at both ends of the mounting ring. The two heat transfer plates are respectively located on both sides of the connecting pipe. One end of the heat transfer plate contacts the side wall of the battery core, and the other end of the heat transfer plate is connected to a push block via a diaphragm. The push block contacts the connecting pipe.

2. The heat dissipation device of the energy storage battery module according to claim 1, characterized in that: A sealing gasket is installed on the frame plate, and the frame plate is connected to the battery cell through the sealing gasket.

3. The heat dissipation device of the energy storage battery module according to claim 1, characterized in that: The frame plate is provided with wing plates, and the battery core is inserted into the wing plates; the battery core is inserted between the wing plates on both sides of the frame plate and is pressed against the sealing pad.

4. The heat dissipation device of the energy storage battery module according to claim 1, characterized in that: A reinforcing rib is installed at one end of the frame plate close to the liquid delivery port and the infusion port.

5. The heat dissipation device of the energy storage battery module according to claim 1, characterized in that: The liquid delivery tube and the liquid infusion tube are both equipped with plugs.

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