Heat conduction assembly, battery module and battery pack

Abstract

The utility model provides a heat conduction assembly, a battery module and a battery pack. The heat conduction assembly comprises a heat conduction main body which is provided with a first end and a second end which are oppositely arranged along a first direction, and the first end and the second end are respectively provided with a first opening; the connecting structures and the heat conduction main body are of a split type structure, the two first openings are each provided with one connecting structure, each connecting structure comprises a plug, a slot and a second opening communicated with the first opening, the second openings are constructed to allow the tabs to penetrate out, the plugs laterally protrude out of the heat conduction main body in the second direction, and the plugs laterally protrude out of the heat conduction main body in the second direction; the slot is located in the extension direction of the plug, a jack of the slot is arranged away from the plug, and the plug is constructed to be provided with a plug-in structure suitable for being matched with the slot in a plug-in mode. According to the technical scheme provided by the utility model, the problem that the efficiency of the grouping process is relatively low due to the fact that the battery cells are easy to misplace in the process of grouping the solid-state battery modules in the prior art can be solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a heat-conducting component, a battery module, and a battery pack. Background Technology

[0002] With the increasing global demand for sustainable energy and green transportation, lithium-ion batteries, as the mainstream power and energy storage batteries, dominate applications in electric vehicles and energy storage systems due to their high energy density, long cycle life, and relatively stable performance. The core components of a lithium-ion battery include positive electrode materials, negative electrode materials, a separator, and electrolyte. Among these, the electrolyte acts as the "blood" of the lithium-ion battery, carrying out the task of lithium-ion transport between the positive and negative electrodes, playing a crucial role in the battery's energy conversion and overall performance. However, electrolytes are typically composed of flammable organic solvents such as carbonates and lithium hexafluorophosphate solutes. While these components can promote efficient ion conduction, they also bring challenges in terms of safety and stability. Especially under extreme conditions such as high temperatures or external forces, internal short circuits can easily occur, leading to electrolyte combustion and even fires, seriously threatening the lives and property of users. To address these safety issues and further improve the energy density and overall performance of batteries, solid-state battery technology has emerged and become a research hotspot in recent years. Solid-state batteries abandon traditional liquid electrolytes in favor of solid electrolytes. These electrolytes not only possess excellent ionic conductivity but also, due to their non-flammability, significantly improve battery safety. Furthermore, the introduction of solid electrolytes allows for greater design flexibility, enabling better matching of high-energy-density positive and negative electrode materials. Combined with the non-flowing nature of solid-state batteries, they offer significant advantages in packaging and integration, helping to reduce system weight. This results in greater potential for energy density improvements in electric vehicles and other mobile devices, demonstrating broad commercial prospects.

[0003] However, in the process of stacking multiple cells in a preset direction to form a solid-state battery module, the existing technology is prone to misalignment between the cells, making alignment difficult and resulting in low assembly process efficiency. Utility Model Content

[0004] The main objective of this invention is to provide a heat-conducting component, a battery module, and a battery pack, which can solve the problem that misalignment between cells is easy to occur during the assembly process of solid-state battery modules in the prior art, resulting in low assembly process efficiency.

[0005] To achieve the above objectives, according to one aspect of the present invention, a heat-conducting assembly is provided, comprising: a heat-conducting body having a mounting cavity for mounting a battery cell; the heat-conducting body having a first end and a second end disposed opposite to each other along a first direction, each of the first end and the second end having a first opening configured to allow the battery cell's tab to pass through; and two connecting structures, the connecting structures being separate from the heat-conducting body, each of the two first openings having a connecting structure including a plug, a slot, and a second opening communicating with the first opening, the second opening being configured to allow the tab to pass through; the plug laterally protruding from the heat-conducting body along a second direction, the slot being located in the extension direction of the plug, the slot's insertion port being disposed away from the plug, and the plug being configured to have a insertion structure suitable for mating with the slot.

[0006] Furthermore, there are multiple heat-conducting bodies, which are arranged sequentially along the second direction. In two adjacent heat-conducting bodies, the plug of one heat-conducting body at the first end is inserted into the slot of the other heat-conducting body at the first end, and the plug of one heat-conducting body at the second end is inserted into the slot of the other heat-conducting body at the second end.

[0007] Furthermore, the connection structure is connected to the heat-conducting body. Along the first direction, both the plug and the slot are located on the outer side of the heat-conducting body, and both the plug and the slot are located on the outer periphery of the second opening.

[0008] Furthermore, the connection structure also includes a first plate segment and a second plate segment that are connected to each other and arranged at an angle. The first plate segment is connected to the heat-conducting body, and the plug, slot and second opening are all provided on the second plate segment.

[0009] Furthermore, at least one first connecting hole is provided at the top and bottom of the second plate segment, and the first connecting hole penetrates the second plate segment along the thickness direction; and / or, a reinforcing structure connects the first plate segment and the second plate segment.

[0010] Furthermore, one of the first plate segment and the heat-conducting body is provided with a second connecting hole, and the other of the first plate segment and the heat-conducting body is provided with a protrusion that can be inserted and engaged with the second connecting hole.

[0011] Furthermore, there are multiple protrusions and multiple second connecting holes, with each protrusion corresponding to a different second connecting hole, and the protrusions are arranged at intervals along the vertical direction.

[0012] Furthermore, the heat-conducting body has a U-shaped structure, including a first heat-conducting component and a second heat-conducting component disposed at opposite ends of the first heat-conducting component; and / or, the heat-conducting component also includes an insulating structure, which covers the outer peripheral surface of the heat-conducting body.

[0013] According to another aspect of the present invention, a battery module is provided, comprising: a cell unit, including the heat-conducting component as described above and a plurality of cells.

[0014] Furthermore, the battery module also includes an annular strap, two end plates, and two L-shaped separators. Along the second direction, the cell unit has a first side and a second side arranged opposite to each other. One of the two end plates is arranged on the first side, and the other of the two end plates is arranged on the second side. The annular strap is wrapped around the outer periphery of the two end plates. Along the first direction, the cell unit has a first end and a second end arranged opposite to each other. One of the two L-shaped separators is installed at the first end of the cell unit, and the other of the two L-shaped separators is installed at the second end of the cell unit. The length of the L-shaped separator is the same as the length of the cell unit, and the L-shaped separator is located between the two end plates.

[0015] Furthermore, both the end plates and the ring straps are made of carbon fiber composite materials.

[0016] Furthermore, there are at least two annular straps, and each end plate is provided with multiple limiting protrusions. The multiple limiting protrusions are arranged at intervals along the length direction of the end plate, and a limiting groove is formed between two adjacent limiting protrusions. The annular strap is located in the limiting groove; and / or, the end plate is provided with lifting holes.

[0017] According to another aspect of the present invention, a battery pack is provided, comprising: a thermally conductive component as described above or a battery module as described above.

[0018] The present invention employs a heat-conducting body, with connecting structures at both its first and second ends. These connecting structures include plugs and slots, allowing plugs and slots located on different heat-conducting bodies at the same end to engage. The connecting structures enable the connection of adjacent heat-conducting bodies, allowing them to be stacked along a second direction. Since the battery cells are installed within the mounting cavity, multiple cells can be arranged sequentially along the second direction to form a battery module. By providing connecting structures at the first and second ends of the heat-conducting body, the plug and corresponding slots engage during stacking, enabling rapid positioning of adjacent heat-conducting bodies and limiting their position in the arrangement direction. This prevents misalignment of the cells and heat-conducting bodies during stacking, eliminating the need for frequent adjustments to align adjacent heat-conducting bodies and cells. Therefore, it improves the efficiency of the stacking process and the yield rate of the battery module.

[0019] In addition, the first opening is connected to the mounting cavity, and the second opening is connected to the first opening. Along the first direction, the tab at one end of the battery cell can pass through the first opening and the second opening at the first end of the heat-conducting body, and the tab at the other end of the battery cell can pass through the first opening and the second opening at the second end of the heat-conducting body. With the above arrangement, the tabs at both ends of the battery cell can pass through the first end and the second end of the heat-conducting body respectively, which facilitates the subsequent welding operation of the tabs and the busbar. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0021] Figure 1 A partial structural schematic diagram of the heat-conducting component according to an embodiment of the present invention is shown;

[0022] Figure 2 An exploded view of a heat-conducting component according to an embodiment of the present invention is shown;

[0023] Figure 3 An exploded view of the structural units of an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of a battery cell unit according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the end plate structure of an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of the structure of the ring-shaped strap according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram of the structure of a battery module according to an embodiment of the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Heat-conducting main body; 11. Mounting cavity; 12. First heat-conducting sub-unit; 13. Second heat-conducting sub-unit; 14. Reinforcing rib; 15. First opening; 20. Connecting structure; 21. Plug; 22. Slot; 23. Second opening; 24. First plate segment; 25. Second plate segment; 251. First connecting hole; 40. Electrode; 50. Reinforcing structure; 60. Second connecting hole; 70. Protrusion; 80. Insulation structure; 81. Third connecting hole; 90. Battery cell; 100. End plate; 101. Limiting protrusion; 102. Limiting groove; 103. Lifting hole; 200. Annular strap; 300. L-shaped partition; 500. Structural unit. Detailed Implementation

[0030] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] See also Figures 1 to 7 As shown, this utility model provides a heat-conducting assembly, which includes: a heat-conducting body 10 having a mounting cavity 11 for mounting a battery cell; along a first direction, the heat-conducting body 10 has a first end and a second end disposed opposite to each other, and each of the first end and the second end is provided with a first opening 15, the first opening 15 being configured to allow the electrode tab 40 of the battery cell to pass through; two connecting structures 20, the connecting structures 20 being a separate structure from the heat-conducting body 10, each of the two first openings 15 being provided with a connecting structure 20, the connecting structure 20 including a plug 21, a slot 22 and a second opening 23 communicating with the first opening 15, the second opening 23 being configured to allow the electrode tab 40 to pass through; along a second direction, the plug 21 protrudes laterally from the heat-conducting body 10, the slot 22 is located in the extension direction of the plug 21, the socket of the slot 22 is disposed away from the plug 21, and the plug 21 is configured to have a plug-in structure suitable for plugging and mating with the slot 22.

[0032] In this embodiment, the first direction refers to the length extension direction of the heat-conducting body 10, and the second direction refers to the thickness direction of the heat-conducting body 10. The first and second directions are perpendicular to each other. The slot 22 is located in the extension direction of the plug 21, that is, the plug 21 and the slot 22 are on a straight line and at the same height. The battery cell 90 is installed in the mounting cavity 11 of the heat-conducting body 10, and the number of battery cells 90 in the mounting cavity 11 is at least one, and the specific number can be set according to actual needs.

[0033] The plug 21 and slot 22 located on the same heat-conducting body 10 cannot be connected, while the plug 21 and slot 22 located on different heat-conducting bodies 10 but at the same end of the heat-conducting body 10 can be connected. The connection structure 20 enables the connection of adjacent heat-conducting bodies 10, allowing them to be stacked in the second direction. Since the battery cells 90 are installed in the mounting cavity 11, multiple battery cells 90 can be arranged sequentially along the second direction to form a battery module. This application, by setting the connection structure 20 at the first and second ends of the heat-conducting body 10, allows for the rapid positioning of adjacent heat-conducting bodies 10 and the limiting of the heat-conducting bodies 10 in the arrangement direction during stacking. This ensures that the battery cells 90 and the heat-conducting bodies 10 will not be misaligned during the stacking process, eliminating the need for frequent adjustments to align adjacent heat-conducting bodies 10 and adjacent battery cells 90. Therefore, it improves the efficiency of the stacking process and the yield rate of the battery module. Furthermore, the above setup significantly reduces the complexity and workload of operations, which not only lowers the difficulty of the process but also means that workers with lower skill levels or less experience can be hired for assembly, thereby reducing labor costs.

[0034] The first opening 15 is connected to the mounting cavity 11, and the second opening 23 is connected to the first opening. Along the first direction, the tab 40 at one end of the battery cell 90 can pass through the first opening 15 and the second opening 23 at the first end of the heat-conducting body 10, and the tab 40 at the other end of the battery cell 90 can pass through the first opening 15 and the second opening 23 at the second end of the heat-conducting body 10. With the above arrangement, the tabs 40 at both ends of the battery cell can pass through the first end and the second end of the heat-conducting body 10 respectively, which facilitates the subsequent welding operation of the tabs 40 and the busbar.

[0035] It should be noted that existing solid-state batteries typically use aluminum-plastic film encapsulation, resulting in limited cell thickness. When cells are arranged in a group along a predetermined direction, the heat-conducting area of ​​the cells is limited to the area formed by the cell's thickness and length, leading to low heat dissipation efficiency. This application, however, improves heat dissipation efficiency by setting a heat-conducting body. If only one cell 90 is installed in the mounting cavity 11, the large surface of the cell 90 contacts the heat-conducting body 10 for heat transfer. The heat generated by the cell is transferred to the heat-conducting body 10 through this large surface, thus improving the battery's heat conduction efficiency. If at least two cells 90 are installed in the mounting cavity 11, arranged sequentially along a second direction, only the large surface of the cell 90 located at the innermost edge of the mounting cavity 11 can contact the heat-conducting body 10 for heat transfer. The large surface of the cell 90 refers to the surface with the largest area.

[0036] Furthermore, the electrolyte of the cell 90 in this application can be a solid electrolyte or a liquid electrolyte. That is, the heat-conducting component of this application can be used for cell stacking and heat dissipation in solid-state batteries as well as for cell stacking and heat dissipation in liquid-state batteries. Since the solid-state battery is packaged with an aluminum-plastic film, the heat-conducting body 10 can also enhance the structural strength of the solid-state battery.

[0037] In one embodiment, the heat-conducting body 10 is made of aluminum.

[0038] In one embodiment, the thickness of the heat-conducting body 10 ranges from 0.1 mm to 3 mm.

[0039] Preferably, the thickness of the heat-conducting body 10 is in the range of 0.2mm to 1mm.

[0040] In one embodiment, the connection structure 20 is made of plastic.

[0041] See also Figures 1 to 7 As shown, in one embodiment of this utility model, a reinforcing rib 14 extending along a first direction is provided on the heat-conducting body 10. The reinforcing rib 14 can improve the structural strength of the heat-conducting body 10. During the assembly of the battery module, the heat-conducting body 10 may deform in some parts due to compression. The reinforcing rib 14 can effectively improve the structural strength of the heat-conducting body 10, reduce the deformation of the heat-conducting body 10, and thus improve the assembly efficiency and the yield rate of the module.

[0042] See also Figures 1 to 7 As shown, in one embodiment of the present invention, there are multiple heat-conducting bodies 10, which are arranged sequentially along the second direction. In two adjacent heat-conducting bodies 10, the plug 21 of one heat-conducting body 10 at the first end is inserted into the slot 22 of the other heat-conducting body 10 at the first end, and the plug 21 of one heat-conducting body 10 at the second end is inserted into the slot 22 of the other heat-conducting body 10 at the second end.

[0043] In this embodiment, multiple heat-conducting bodies 10 are arranged sequentially along the second direction, and adjacent heat-conducting bodies 10 are connected by plug 21 and slot 22.

[0044] See also Figures 1 to 7As shown, in one embodiment of this utility model, there are two plugs 21 and two slots 22. The two plugs 21 are spaced apart vertically, and the two slots 22 are spaced apart vertically, with each plug 21 corresponding to one slot 22. That is, the top and bottom of the first end of the heat-conducting body 10 each have a plug 21 and a slot 22, and the top and bottom of the second end of the heat-conducting body 10 each have a plug 21 and a slot 22. This arrangement improves the connection stability between adjacent heat-conducting bodies 10, thereby improving the overall structural stability of the battery module.

[0045] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the connecting structure 20 is connected to the heat-conducting body 10. Along the first direction, the plug 21 and the slot 22 are both located on the outer side of the heat-conducting body 10, and the plug 21 and the slot 22 are both located on the outer periphery of the second opening 23.

[0046] In this embodiment, along the first direction, both the plug 21 and the slot 22 are located outside the heat-conducting body 10. That is, the plug 21 and the slot 22 at the first and second ends of the heat-conducting body 10 are located outside the mounting cavity 11. When it is necessary to connect two adjacent heat-conducting bodies 10, there is no need for complex positioning and assembly inside the heat-conducting body 10. The plug 21 can be directly connected to the external slot 22 on the adjacent heat-conducting body 10, which greatly simplifies the assembly process and improves assembly efficiency. Furthermore, placing the plug 21 and the slot 22 outside the heat-conducting body 10 allows the operator to visually see the connection status between the slot 22 and the plug 21 during the assembly process.

[0047] The tabs 40 of the battery cell 90 installed in the mounting cavity 11 can pass through the second opening 23, facilitating subsequent operations such as soldering to the busbar. The plug 21 and slot 22 are located on the outer periphery of the second opening 23, which can avoid obstructing the passage of the tabs 40.

[0048] In one embodiment, the connecting structure 20 is made of ABS engineering plastic.

[0049] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the connecting structure 20 further includes a first plate segment 24 and a second plate segment 25 that are connected to each other and arranged at an angle. The first plate segment 24 is connected to the heat-conducting body 10, and the plug 21, the slot 22 and the second opening 23 are all disposed on the second plate segment 25.

[0050] The above settings enable the connection between the connection structure 20 and the conductor body.

[0051] It should be noted that the connection structure 20 is made of insulating material (such as plastic). The connection structure 20 can improve the structural strength of the heat-conducting body 10 and can also achieve insulation between it and the tab 40.

[0052] In one embodiment, the first plate segment 24 is perpendicular to the second plate segment 25.

[0053] See also Figures 1 to 7 As shown, in one embodiment of the present invention, at least one first connecting hole 251 is provided at the top and bottom of the second plate segment 25, and the first connecting hole 251 penetrates the second plate segment 25 along the thickness direction of the second plate segment 25.

[0054] In this embodiment, the first connecting hole 251 is a through hole, which is used to connect with the bracket on which the busbar is installed. The bracket is provided with at least one protrusion on the side facing the second plate segment 25. At least one first connecting hole 251 is provided in correspondence with at least one protrusion, and the protrusion passes through the corresponding first connecting hole 251 to realize the connection between the bracket and the second plate segment 25. Compared with the prior art of fixing by bolts, it can improve the assembly efficiency of the module. At the same time, the connecting structure 20 has a supporting function for the bracket, which can avoid the poor welding of the tab and the busbar due to insufficient support force of the bracket when welding the tab 40.

[0055] See also Figures 1 to 7 As shown, in one embodiment of the present invention, a reinforcing structure 50 is connected between the first plate segment 24 and the second plate segment 25.

[0056] In this embodiment, the reinforcement structure 50 can enhance the connection stability between the first plate segment 24 and the second plate segment 25 and improve the structural strength of the connection structure 20.

[0057] In one embodiment, the reinforcing structure 50 is a triangular plate.

[0058] See also Figures 1 to 7 As shown, in one embodiment of the present invention, a second connecting hole 60 is provided on one of the first plate segment 24 and the heat-conducting body 10, and a protrusion 70 is provided on the other of the first plate segment 24 and the heat-conducting body 10, the protrusion 70 being able to be inserted and engaged with the second connecting hole 60.

[0059] In this embodiment, the protrusion 70 passes through the second connecting hole 60, enabling the connection between the first plate segment 24 and the heat-conducting body 10. The second connecting hole 60 is adapted to the protrusion 70.

[0060] In one embodiment, the second connecting hole 60 is a circular through hole, and the protrusion 70 is cylindrical.

[0061] See also Figures 1 to 7As shown, in one embodiment of the present invention, there are multiple protrusions 70 and multiple second connecting holes 60, and the multiple protrusions 70 are arranged in a one-to-one correspondence with the multiple second connecting holes 60, and the multiple protrusions 70 are arranged at intervals along the vertical direction.

[0062] In this embodiment, multiple protrusions 70 and second connecting holes 60 are arranged at intervals along the vertical direction. The arrangement of multiple protrusions 70 and multiple second connecting holes 60 can further enhance the connection stability between the first plate segment 24 and the heat-conducting body 10.

[0063] See also Figures 1 to 7 As shown, in one embodiment of this utility model, there are three protrusions 70 and three second connecting holes 60. The three protrusions 70 are arranged at intervals in the vertical direction and staggered in the first direction, meaning that the three protrusions 70 are not on the same straight line. Similarly, the three second connecting holes 60 are also staggered in the first direction and are not on the same straight line. The three protrusions 70 and the three second connecting holes 60 are arranged in a one-to-one correspondence, with the protrusions 70 passing through the corresponding second connecting holes 60. The fact that the three protrusions 70 are not on the same straight line means that during the connection process, they will not simultaneously bear the stress from the same direction. This staggered distribution can disperse external forces and avoid excessive stress concentration at a single connection point. Through the cooperation of the non-straight protrusions 70 and the second connecting holes 60, it can be ensured that the connection force between the first plate segment 24 and the heat-conducting body 10 is evenly distributed on three independent support points. This three-point support structure is similar to the stability principle of a triangle, which can provide more stable support when subjected to pressure or tension, thereby improving the connection strength between the first plate segment 24 and the heat-conducting body 10.

[0064] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the heat-conducting body 10 has a U-shaped structure and includes a first heat-conducting component 12 and a second heat-conducting component 13 disposed at opposite ends of the first heat-conducting component 12.

[0065] In this embodiment, the connecting structure 20 is connected to the first heat-conducting component 12, and the first heat-conducting component 12 makes large-area contact with the battery cell 90 for heat transfer. Two second heat-conducting components 13 are located on the same side of the first heat-conducting component 12 and are parallel to each other. One end of the second heat-conducting component 13 is connected to the first heat-conducting component 12, and the other end of the second heat-conducting component 13 extends away from the first heat-conducting component 12 along the second direction.

[0066] The large surface of the battery cell 90 contacts the first heat-conducting component 12 for heat transfer. The heat generated by the battery cell is transferred through the large surface of the battery cell to the first heat-conducting component 12, and then to the second heat-conducting component 13, which can improve the thermal conductivity of the battery.

[0067] Multiple heat-conducting bodies 10 are included, and each heat-conducting body 10 and the battery cell 90 installed in its mounting cavity together form a structural unit 500. Since there are multiple heat-conducting bodies, multiple structural units 500 can be formed. The multiple structural units 500 are arranged sequentially along the second direction to form a battery module. Two adjacent heat-conducting bodies are connected together by a connecting structure. The first heat-conducting parts 12 of two adjacent heat-conducting bodies are arranged opposite each other along the second direction, and the first heat-conducting parts of two adjacent heat-conducting bodies are parallel to each other. The first heat-conducting part 12 and two second heat-conducting parts 13 of one heat-conducting body and the first heat-conducting part 12 of another heat-conducting body together form a rectangular frame structure. The battery cell in the mounting cavity of one heat-conducting body is located within the above-mentioned rectangular frame structure. When the battery cell 90 experiences thermal runaway, the hot gas and hot ejected material generated by the thermal runaway can only be ejected from the first and second ends of the heat-conducting body, thus guiding the ejected material when thermal runaway occurs. In one embodiment, the first heat-conducting part 12 and the two second heat-conducting parts 13 are an integral structure.

[0068] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the heat-conducting component further includes an insulating structure 80, which covers the outer peripheral surface of the heat-conducting body 10.

[0069] In this embodiment, the insulation structure 80 enables electrical isolation between the heat-conducting body 10 and the surrounding environment, thereby improving the insulation of the battery module.

[0070] See also Figures 1 to 7 As shown, in one embodiment of the present invention, along the first direction, the insulating structure 80 is provided with a third connecting hole 81 at both opposite ends. The number of third connecting holes 81 is the same as the number of second connecting holes 60. The second connecting holes 60 and the third connecting holes 81 located at the same end are provided in a one-to-one correspondence. The protrusion 70 can pass through the corresponding second connecting hole 60 and the third connecting hole 81 in sequence.

[0071] In one embodiment, the insulating structure 80 is an insulating film made of polyimide (PI) or polyethylene terephthalate (PET), and the thickness of the insulating film ranges from 0.05 mm to 1 mm.

[0072] Preferably, the thickness of the insulating film is 0.1 mm.

[0073] See also Figures 1 to 7 As shown, according to another aspect of the present invention, the present invention provides a battery module, including: a cell unit, including the heat-conducting component as described above and a plurality of cells 90.

[0074] In this embodiment, the heat-conducting component of the battery module has all the technical solutions and effects of the aforementioned heat-conducting components, which will not be repeated here.

[0075] There are multiple heat-conducting bodies 10, and at least one battery cell 90 is installed in the mounting cavity 11 of each heat-conducting body 10. The heat-conducting bodies 10 and the battery cells 90 installed in their mounting cavities 11 together form a structural unit 500. Multiple structural units 500 are arranged sequentially along the second direction to form a battery module. The advantages of the structural unit 500 are as follows: 1) Improves the structural strength of the battery module; 2) Improves the thermal conductivity of the battery module.

[0076] In one embodiment, the heat-conducting body 10 has a U-shaped structure, and the heat-conducting body 10 can partially surround the battery cell 90 installed in the mounting cavity 11.

[0077] See also Figures 1 to 7 As shown, in one embodiment of the present invention, the battery module further includes an annular strap 200, two end plates 100, and two L-shaped separators 300. Along the second direction, the cell unit has a first side and a second side arranged opposite to each other. One of the two end plates 100 is arranged on the first side, and the other of the two end plates 100 is arranged on the second side. The annular strap 200 is wrapped around the outer periphery of the two end plates 100. Along the first direction, the cell unit has a first end and a second end arranged opposite to each other. One of the two L-shaped separators 300 is installed at the first end of the cell unit, and the other of the two L-shaped separators 300 is installed at the second end of the cell unit. The length of the L-shaped separator 300 is the same as the length of the cell unit, and the L-shaped separator 300 is located between the two end plates 100.

[0078] In this embodiment, the annular strap 200 is wrapped around the outer periphery of the two end plates 100, connecting the battery cell unit and the two end plates 100 into a whole. The two L-shaped partitions 300 serve both a decorative purpose and provide protection for the battery cell unit.

[0079] In one embodiment, the L-shaped partition 300 is made of mica.

[0080] Solid-state batteries offer several advantages: 1) Due to the solid electrolyte, they possess greater rigidity, reducing the likelihood of short circuits between the positive and negative electrodes and ensuring high safety; 2) They reduce battery size, increasing system energy density; and 3) The electrolyte exhibits excellent performance at both high and low temperatures. However, solid-state batteries suffer from low ionic conductivity and high interfacial impedance. Furthermore, the solid electrolyte's inertia prevents perfect adhesion between the electrolyte and electrodes, resulting in low electrode material utilization. To ensure efficient electrode material utilization, significant force is required for perfect adhesion between the electrolyte and electrode materials, necessitating a high preload force in the module. This preload force increases the difficulty of assembling solid-state batteries. Conventional lithium-ion batteries require preload forces ranging from several to several hundred kPa, while solid-state batteries typically require preload forces in the MPa range. Conventional battery systems cannot meet the assembly requirements of solid-state batteries.

[0081] Existing battery module connection methods include: 1) Connecting the module's front and rear end plates, left and right side plates, and top and bottom cover plates (six sides in total) using welding, bolts, etc., providing the required preload force. 2) Simplifying the module's left and right side plates and top and bottom cover plates by using composite materials such as mica, connecting the front and rear end plates 100 together using steel strips, bolts, etc., providing the required preload force. 3) Placing the module directly in the battery pack, with the pack's crossbeams providing the required preload force. However, these modules use liquid electrolyte batteries, and the maximum preload force is in the KPA range. For solid-state batteries, this preload force is in the MPA range. The preload force of solid-state batteries is much greater than that of conventional battery packs, typically in the MPA range, exceeding the strength and modulus of conventional battery pack end plates 100. Conventional materials are far from meeting the assembly requirements of solid-state batteries.

[0082] To address the aforementioned issues, in one embodiment of this invention, both the end plate 100 and the annular strap 200 are made of carbon fiber composite material.

[0083] In this embodiment, the end plate 100 is made of carbon fiber composite material, giving it high strength and high elastic modulus while reducing its weight. Since carbon fiber composite material also has good thermal conductivity, the end plate 100 can effectively disperse the heat generated by the battery cells, effectively increasing the heat dissipation path of the module and thus improving its heat dissipation efficiency. The annular strap 200 is also made of carbon fiber composite material, giving it high strength and high elastic modulus while reducing its weight. Furthermore, the good thermal conductivity of carbon fiber composite material allows the annular strap 200 to effectively disperse the heat generated by the battery cells, effectively increasing the heat dissipation path of the module and further improving its heat dissipation efficiency. Carbon fiber composite material is a lightweight, high-strength, and high-modulus composite material widely used in new energy and other industries. Different molding methods for carbon fiber composite materials, such as winding and layup, are based on the different mechanical properties of carbon fiber materials.

[0084] As described above, both the end plate 100 and the annular strap 200 of this application are made of carbon fiber composite material. This not only achieves weight reduction during module assembly but also provides the high preload required for solid-state batteries. It solves both the problems of high strength and high elastic modulus required for the end plate 100 and the annular strap 200, as well as the problem of high preload required for module assembly. Simultaneously, carbon fiber composite material is also an excellent thermal conductor, increasing the heat dissipation pathways of the module, thereby ensuring the normal operation of the solid-state battery while meeting the assembly requirements.

[0085] See also Figures 1 to 7 As shown, in one embodiment of this utility model, the end plate 100 is provided with a lifting hole 103. During the assembly of the battery module into a battery pack, the lifting hole 103 provides a safe and convenient lifting point. Using existing lifting equipment in conjunction with the lifting hole 103, the entire module can be lifted and moved smoothly and safely.

[0086] It should be noted that the end plate 100 is an important component of the battery module, and it can improve the structural strength of the module. The inclusion of heat-conducting components can improve the structural strength and thermal conductivity of the solid-state battery system.

[0087] See also Figures 1 to 7 As shown, in one embodiment of the present invention, there are at least two annular straps 200. Each end plate 100 is provided with multiple limiting protrusions 101. The multiple limiting protrusions 101 are arranged at intervals along the length direction of the end plate 100. A limiting groove 102 is formed between two adjacent limiting protrusions 101. The annular strap 200 is located in the limiting groove 102.

[0088] The above settings can prevent the ring strap 200 from slipping in the first direction.

[0089] According to another aspect of the present invention, the present invention provides a battery pack, including: a heat-conducting component as described above or a battery module as described above.

[0090] In this embodiment, the heat-conducting components of the battery pack have all the above-mentioned technical solutions and effects, which will not be repeated here. The battery modules of the battery pack have all the above-mentioned technical solutions and effects, which will not be repeated here.

[0091] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: A heat-conducting body is provided, and both the first and second ends of the heat-conducting body are provided with connecting structures. The connecting structures include plugs and slots, and plugs and slots located on different heat-conducting bodies and at the same end of the heat-conducting bodies can be connected. The connection structure enables the connection of adjacent heat-conducting bodies, allowing them to be stacked in a second direction. Since the battery cells are installed in the mounting cavity, multiple battery cells can be arranged sequentially along the second direction, ultimately forming a battery module. By providing connecting structures at the first and second ends of the heat-conducting body, the plug and corresponding slots can be connected during stacking, enabling rapid positioning of adjacent heat-conducting bodies and limiting their position in the arrangement direction. This ensures that the battery cells and heat-conducting bodies will not misalign during stacking, eliminating the need for frequent adjustments to align adjacent heat-conducting bodies and adjacent battery cells. Therefore, it improves the efficiency of the stacking process and the yield rate of the battery module. In addition, the first opening is connected to the mounting cavity, and the second opening is connected to the first opening. Along the first direction, the tab at one end of the battery cell can pass through the first opening and the second opening at the first end of the heat-conducting body, and the tab at the other end of the battery cell can pass through the first opening and the second opening at the second end of the heat-conducting body. With the above arrangement, the tabs at both ends of the battery cell can pass through the first end and the second end of the heat-conducting body respectively, which facilitates the subsequent welding operation of the tabs and the busbar.

[0092] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0093] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0094] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A thermally conductive component, characterized in that, include: The heat-conducting body (10) has a mounting cavity (11) for mounting a battery cell (90). Along a first direction, the heat-conducting body (10) has a first end and a second end disposed opposite to each other. Both the first end and the second end are provided with a first opening (15). The first opening (15) is configured to allow the tab (40) of the battery cell (90) to pass through. Two connection structures (20) are provided at each of the two first openings (15). The connection structure (20) includes a plug (21), a slot (22) and a second opening (23) communicating with the first opening (15). The second opening (23) is configured to allow the tab (40) to pass through. Along the second direction, the plug (21) protrudes laterally from the heat-conducting body (10). The slot (22) is located in the extension direction of the plug (21). The socket of the slot (22) is set away from the plug (21). The plug (21) is configured to have a plug-in structure suitable for plugging into the slot (22).

2. The thermally conductive component according to claim 1, characterized in that, There are multiple heat-conducting bodies (10), and the multiple heat-conducting bodies (10) are arranged sequentially along the second direction. In two adjacent heat-conducting bodies (10), the plug (21) of one heat-conducting body (10) located at the first end is inserted into the slot (22) of the other heat-conducting body (10) located at the first end. The plug (21) of one heat-conducting body (10) located at the second end is inserted into the slot (22) of the other heat-conducting body (10) located at the second end.

3. The thermally conductive component according to claim 1 or 2, characterized in that, The connection structure (20) is connected to the heat-conducting body (10). Along the first direction, the plug (21) and the slot (22) are both located on the outside of the heat-conducting body (10), and the plug (21) and the slot (22) are both located on the outer periphery of the second opening (23).

4. The thermally conductive component according to claim 1 or 2, characterized in that, The connection structure (20) further includes a first plate segment (24) and a second plate segment (25) that are connected to each other and arranged at an angle. The first plate segment (24) is connected to the heat-conducting body (10), and the plug (21), the slot (22) and the second opening (23) are all arranged on the second plate segment (25).

5. The thermally conductive component according to claim 4, characterized in that, The second plate segment (25) is provided with at least one first connecting hole (251) at both the top and bottom, and the first connecting hole (251) penetrates the second plate segment (25) along the thickness direction of the second plate segment (25); and / or, a reinforcing structure (50) is connected between the first plate segment (24) and the second plate segment (25).

6. The thermally conductive component according to claim 4, characterized in that, A second connecting hole (60) is provided on one of the first plate segment (24) and the heat-conducting body (10), and a protrusion (70) is provided on the other of the first plate segment (24) and the heat-conducting body (10), the protrusion (70) being able to be inserted into the second connecting hole (60).

7. The thermally conductive component according to claim 6, characterized in that, There are multiple protrusions (70) and multiple second connecting holes (60), and the multiple protrusions (70) are arranged one-to-one with the multiple second connecting holes (60). The multiple protrusions (70) are arranged at intervals along the vertical direction.

8. The thermally conductive component according to claim 1 or 2, characterized in that, The heat-conducting body (10) has a U-shaped structure. The heat-conducting body (10) includes a first heat-conducting component (12) and a second heat-conducting component (13) disposed at opposite ends of the first heat-conducting component (12); and / or, the heat-conducting component further includes an insulating structure (80), which covers the outer peripheral surface of the heat-conducting body (10).

9. A battery module, characterized in that, include: A battery cell unit includes a thermally conductive component and a plurality of battery cells as described in any one of claims 1 to 8.

10. The battery module according to claim 9, characterized in that, The battery module further includes an annular strap (200), two end plates (100), and two L-shaped separators (300). Along the second direction, the cell unit has a first side and a second side arranged opposite to each other. One of the two end plates (100) is arranged on the first side, and the other of the two end plates (100) is arranged on the second side. The annular strap (200) is wrapped around the outer periphery of the two end plates (100). Along the first direction, the cell unit has a first end and a second end arranged opposite to each other. One of the two L-shaped separators (300) is installed at the first end of the cell unit, and the other of the two L-shaped separators (300) is installed at the second end of the cell unit. The length of the L-shaped separator (300) is the same as the length of the cell unit, and the L-shaped separator (300) is located between the two end plates (100).

11. The battery module according to claim 10, characterized in that, Both the end plate (100) and the annular strap (200) are made of carbon fiber composite material.

12. The battery module according to claim 10, characterized in that, There are at least two annular straps (200), and each end plate (100) is provided with multiple limiting protrusions (101). The multiple limiting protrusions (101) are arranged at intervals along the length direction of the end plate (100), and a limiting groove (102) is formed between two adjacent limiting protrusions (101). The annular strap (200) is located in the limiting groove (102); and / or, the end plate (100) is provided with a lifting hole (103).

13. A battery pack, characterized in that, include: The thermally conductive component as described in any one of claims 1 to 8 or the battery module as described in any one of claims 9 to 12.

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