Liquid-cooled battery pack structure

Abstract

The utility model relates to the technical field of battery packs, and discloses a liquid cooling battery pack structure which comprises a heat dissipation top plate, a battery pack is arranged below the heat dissipation top plate, a heat dissipation bottom plate is arranged below the battery pack, circulating pipes are arranged in the heat dissipation top plate and the heat dissipation bottom plate, one end of each circulating pipe is fixedly connected with a diverter, and the other end of each circulating pipe is fixedly connected with a cooling fan. A heat conduction assembly is arranged in the middle of the battery pack and used for conducting flow guiding on heat generated by the battery pack, and heat dissipation assemblies are arranged in the heat dissipation top plate and the heat dissipation bottom plate and used for conducting heat dissipation on the battery pack. According to the utility model, the problems that the cooling effect is not uniformly distributed among the batteries and local overheating is easily formed due to the fact that the structural cooling is difficult to effectively cover are solved, and the working temperature of each battery monomer can be effectively reduced through uniform heat dissipation, so that the output stability of the battery pack is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a liquid-cooled battery pack structure. Background Art

[0002] A battery pack is a system composed of multiple battery cells, designed to provide high energy density and high power output to meet the needs of applications such as electric vehicles and energy storage systems. When outputting high power, the battery generates a large amount of heat. Excessive temperatures can accelerate battery aging and even cause thermal runaway and safety risks. Therefore, a liquid-cooled battery pack structure effectively removes heat through the circulation of coolant, ensuring that the battery pack operates within an appropriate temperature range, improving heat dissipation efficiency, temperature uniformity, and system safety. This structure not only extends battery life but also enhances system stability under high load and high temperature environments.

[0003] Traditional liquid-cooled battery packs utilize cooling plates installed between battery modules, using coolant circulating through the plates' channels to remove heat generated during battery operation. The coolant, driven by a water pump, flows in from one end of the cooling plate, absorbs heat from the batteries, and then flows out from the other end. It is then cooled by a radiator and circulated back into the system. This method effectively controls battery temperature, prevents overheating, and improves battery performance, stability, and safety, making it particularly suitable for high-power, high-density applications.

[0004] When using a traditional liquid-cooled battery pack structure, heat is dissipated by the coolant flowing mainly along the cooling plate channels. This setting makes it difficult to effectively cover the entire surface of each battery cell, resulting in uneven distribution of the cooling effect among the batteries and prone to local overheating. Utility Model Content

[0005] In order to make up for the above shortcomings, the present invention provides a liquid-cooled battery pack structure, which aims to improve the problem that the traditional liquid-cooled battery pack structure has difficulty in effective cooling coverage, resulting in uneven distribution of cooling effect among batteries and easy formation of local overheating.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a liquid-cooled battery pack structure, comprising a heat dissipation top plate, a battery pack is arranged below the heat dissipation top plate, a heat dissipation bottom plate is arranged below the battery pack, a circulation pipe is arranged inside the heat dissipation top plate and the heat dissipation bottom plate, one end of the circulation pipe is fixedly connected to a shunt, a heat conduction component is arranged in the middle of the battery pack, the heat conduction component is used to conduct heat generated by the battery pack, a heat dissipation component is arranged inside the heat dissipation top plate and the heat dissipation bottom plate, the heat dissipation component is used to dissipate heat from the battery pack, and pads are fixedly connected to the outer walls of the heat dissipation top plate and the heat dissipation bottom plate;

[0007] The heat-conducting component includes a heat dissipation plate, which is arranged between the battery packs. A heat-conducting silicone sheet is fixedly connected to the interior of the heat dissipation plate.

[0008] Furthermore, one side of the outer wall of the circulating water tank is fixedly connected to the outer walls of the heat dissipation top plate and the heat dissipation bottom plate, and a heat dissipation layer is provided inside the heat dissipation top plate and the heat dissipation bottom plate.

[0009] Furthermore, supports are fixedly connected to the upper and lower sides of the battery pack, the outer walls of the supports are arranged on the inner walls of the heat dissipation top plate and the heat dissipation bottom plate, two layers of fireproof barriers are arranged inside the heat dissipation plate, a heat conductive layer is arranged inside the circulating water tank, and a protective component is arranged inside the circulating pipe, and the protective component is used to improve the service life of the structure.

[0010] Furthermore, the protection component includes a protection cover, which is arranged inside the circulation pipe, and a bonding layer is provided inside the heat dissipation top plate and the heat dissipation bottom plate.

[0011] Furthermore, the heat dissipation plates are arranged in a crisscross pattern in the middle of the battery pack, and the heat dissipation plates are used to transport heat generated by the battery pack.

[0012] Furthermore, two layers of the fireproof barrier are arranged on both sides of the thermally conductive silicone sheet, and the fireproof barrier is used to prevent thermal runaway of the battery pack.

[0013] Furthermore, the protective sleeve is made of polytetrafluoroethylene to increase the service life of the circulation pipe.

[0014] Furthermore, the bonding layer is made of stainless steel for heat conduction and corrosion resistance.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the present invention, cooling water is first transported through the diverter and the circulation pipe, and then evenly distributed through the heat dissipation top plate, heat dissipation bottom plate and circulating water tank to dissipate heat on the upper and lower sides of the battery pack. Finally, the heat dissipation plate and thermal conductive silicone sheet are used to efficiently dissipate heat between the battery packs, solving the problem of structural cooling being difficult to effectively cover, resulting in uneven distribution of cooling effect between batteries and easy formation of local overheating. Achieving uniform heat dissipation can effectively reduce the operating temperature of each battery cell, thereby maintaining the stability of the battery pack output.

[0017] 2. In the present invention, firstly, the fireproof barrier on both sides of the thermally conductive silicone sheet can prevent thermal runaway and provide physical protection. Then, the protective cover, the thermal conductive layer and the bonding layer are used to increase the service life of the circulation pipe, the heat dissipation top plate and the heat dissipation bottom plate, thereby achieving the goal of extending the life of the structure, maintaining good performance in long-term use, and reducing the risk of cooling failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a liquid-cooled battery pack structure proposed by the present invention;

[0019] Figure 2 This is a schematic diagram of the structure below the heat dissipation top plate of a liquid-cooled battery pack structure proposed in the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of a heat sink of a liquid-cooled battery pack structure proposed in the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of a circulation tube of a liquid-cooled battery pack structure proposed in the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of a circulating water tank of a liquid-cooled battery pack structure proposed in the present invention.

[0023] Legend:

[0024] 1. Heat dissipation top plate; 2. Heat dissipation bottom plate; 3. Circulation pipe; 4. Diverter; 5. Battery pack; 6. Pad; 7. Heat dissipation plate; 8. Circulation water tank; 9. Fireproof barrier; 10. Protective cover; 11. Heat dissipation layer; 12. Lamination layer; 13. Thermal conductive layer; 14. Support; 15. Thermal conductive silicone sheet. DETAILED DESCRIPTION

[0025] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0026] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 5, the utility model provides an embodiment: a liquid-cooled battery pack structure, including a heat dissipation top plate 1, a battery pack 5 is arranged below the heat dissipation top plate 1, a heat dissipation bottom plate 2 is arranged below the battery pack 5, a circulation pipe 3 is arranged inside the heat dissipation top plate 1 and the heat dissipation bottom plate 2, one end of the circulation pipe 3 is fixedly connected to a diverter 4, and the cooling water is transported to the inside of the heat dissipation top plate 1 and the heat dissipation bottom plate 2 through the diverter 4 and the circulation pipe 3, so that the cooling water can circulate inside the circulating water tank 8, effectively expanding the cooling range, a heat conduction component is provided in the middle of the battery pack 5, the heat conduction component is used to conduct the heat generated by the battery pack 5, the heat dissipation top plate 1 and the heat dissipation bottom plate 2 are both provided with heat dissipation components, the heat dissipation components are used to dissipate heat for the battery pack 5, and the outer walls of the heat dissipation top plate 1 and the heat dissipation bottom plate 2 are fixedly connected with pads 6;

[0027] The heat conduction component includes a heat sink 7, which is arranged between the battery packs 5. A heat-conducting silicone sheet 15 is fixedly connected to the interior of the heat sink 7. The heat between the battery packs 5 can be transported through the heat sink 7 and the internal heat-conducting silicone sheet 15 to achieve heat conduction and heat dissipation. The component includes a circulating water tank 8, one side of the outer wall of the circulating water tank 8 is fixedly connected to the outer walls of the heat dissipation top plate 1 and the heat dissipation bottom plate 2. The heat dissipation top plate 1 and the heat dissipation bottom plate 2 are both provided with a heat dissipation layer 11. The circulating water tank 8 containing circulating cooling water inside the heat dissipation top plate 1 and the heat dissipation bottom plate 2 cooperates with the internal fireproof barrier 9 to effectively dissipate heat;

[0028] Reference Figure 3 - Figure 5 , the upper and lower sides of the battery pack 5 are fixedly connected with a support 14, the outer wall of the support 14 is set on the inner wall of the heat dissipation top plate 1 and the heat dissipation bottom plate 2, and the interior of the heat dissipation plate 7 is provided with two layers of fireproof barrier 9, which can effectively prevent the thermal runaway of the battery pack 5 from spreading and avoid the chain reaction of the entire battery group. In addition, it can also provide a certain strength. The interior of the circulating water tank 8 is provided with a heat conductive layer 13, which can further transport heat to the interior of the circulating water tank 8 through the heat conductive layer 13. A protective component is provided inside the circulating pipe 3, which is used to improve the service life of the structure. The protective component includes a protective sleeve 10, which is provided on Inside the circulation pipe 3, the corrosion resistance of the circulation pipe 3 is improved by the protective sleeve 10. The inside of the heat dissipation top plate 1 and the heat dissipation bottom plate 2 are both provided with a bonding layer 12. The bonding layer 12 can not only conduct heat but also prevent corrosion. The heat dissipation plates 7 are arranged in a criss-cross pattern in the middle of the battery pack 5. The heat dissipation plates 7 are used to transport the heat generated by the battery pack 5. Two layers of fireproof barriers 9 are arranged on both sides of the thermal conductive silicone sheet 15. The fireproof barriers 9 are used to prevent thermal runaway of the battery pack 5. The protective sleeve 10 is made of polytetrafluoroethylene and is used to increase the service life of the circulation pipe 3. The bonding layer 12 is made of stainless steel and is used for heat conduction and corrosion prevention.

[0029] Working principle: when the liquid-cooled battery pack structure needs to be used, first connect the shunt 4 with the external cooling water tank, so that the cooling water is delivered to the inside of the two circulating pipes 3, at this time the cooling water is delivered to the inside of the circulating water tank 8 through the circulating pipe 3, and finally output through the other end, in the process, the heat generated by the battery pack 5 is delivered to the circulating water tank 8 on the upper and lower sides through the heat-conducting silica gel sheet 15 inside the heat sink 7 and the support 14, then the heat is exchanged through the cooling water inside the circulating water tank 8, and the cooling is carried out, at the same time, the heat dissipation can also be further carried out through the heat dissipation layer 11 inside the heat dissipation top plate 1 and the heat dissipation bottom plate 2, so that the heat dissipation is realized efficiently.

[0030] In addition, during long-time use, the circulating pipe 3 can be effectively prevented from being corroded and damaged due to the influence of the cooling water through the protective sleeve 10, so that side leakage is prevented, at the same time, the heat is delivered through the heat-conducting layer 13 and the adhering layer 12 inside the circulating water tank 8, so that the corrosion problem can also be prevented, finally the heat runaway is prevented from spreading to the adjacent battery through the fireproof separation layer 9 on both sides of the heat-conducting silica gel sheet 15.

[0031] Finally, it should be pointed out that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A liquid-cooled battery pack structure, comprising a heat dissipation top plate (1), characterized in that: A battery pack (5) is provided below the heat dissipation top plate (1), a heat dissipation bottom plate (2) is provided below the battery pack (5), a circulation pipe (3) is provided inside the heat dissipation top plate (1) and the heat dissipation bottom plate (2), one end of the circulation pipe (3) is fixedly connected to a diverter (4), a heat conduction component is provided in the middle of the battery pack (5), the heat conduction component is used to conduct heat generated by the battery pack (5), a heat dissipation component is provided inside the heat dissipation top plate (1) and the heat dissipation bottom plate (2), the heat dissipation component is used to dissipate heat from the battery pack (5), and a pad (6) is fixedly connected to the outer walls of the heat dissipation top plate (1) and the heat dissipation bottom plate (2); The heat-conducting assembly comprises a heat dissipation plate (7), the heat dissipation plate (7) being arranged between the battery packs (5), and a heat-conducting silicone sheet (15) being fixedly connected to the interior of the heat dissipation plate (7).

2. The liquid-cooled battery pack structure according to claim 1, characterized in that: The heat dissipation component comprises a circulating water tank (8), one side of an outer wall of the circulating water tank (8) is fixedly connected to the outer walls of the heat dissipation top plate (1) and the heat dissipation bottom plate (2), and a heat dissipation layer (11) is provided inside the heat dissipation top plate (1) and the heat dissipation bottom plate (2).

3. The liquid-cooled battery pack structure according to claim 2, characterized in that: The upper and lower sides of the battery pack (5) are fixedly connected to supports (14), the outer walls of the supports (14) are arranged on the inner walls of the heat dissipation top plate (1) and the heat dissipation bottom plate (2), two layers of fireproof insulation (9) are arranged inside the heat dissipation plate (7), a heat conductive layer (13) is arranged inside the circulating water tank (8), and a protective component is arranged inside the circulating pipe (3), and the protective component is used to increase the service life of the structure.

4. The liquid-cooled battery pack structure according to claim 3, characterized in that: The protective assembly comprises a protective sleeve (10), the protective sleeve (10) being arranged inside the circulation pipe (3), and a bonding layer (12) being arranged inside both the heat dissipation top plate (1) and the heat dissipation bottom plate (2).

5. The liquid-cooled battery pack structure according to claim 1, characterized in that: The heat dissipation plates (7) are arranged in a crisscross pattern in the middle of the battery pack (5), and the heat dissipation plates (7) are used to transport heat generated by the battery pack (5).

6. The liquid-cooled battery pack structure according to claim 3, characterized in that: Two layers of the fireproof barrier (9) are arranged on both sides of the heat-conducting silicone sheet (15), and the fireproof barrier (9) is used to prevent thermal runaway of the battery pack (5).

7. The liquid-cooled battery pack structure according to claim 4, characterized in that: The protective sleeve (10) is made of polytetrafluoroethylene and is used to increase the service life of the circulation pipe (3).

8. The liquid-cooled battery pack structure according to claim 4, characterized in that: The bonding layer (12) is made of stainless steel and is used for heat conduction and corrosion resistance.

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