Flow guide block, battery cell module, battery module and battery pack

Abstract

The utility model provides a flow guide block, a battery cell module, a battery module and a battery pack. The current guide block is used for realizing connection between a tab (7) and a busbar (8), the current guide block comprises a body (1), the same side of the body (1) is provided with a first electric connection area (2) and a second electric connection area (3), the first electric connection area (2) is configured to be electrically connected with the tab (7), the second electric connection area (3) is configured to be electrically connected with the busbar (8), the height of the first electric connection area (2) is lower than that of the second electric connection area (3), and the height of the second electric connection area (3) is lower than that of the body (1). The height difference between the first electric connection area (2) and the second electric connection area (3) is greater than or equal to the thickness of the tab (7), and the first electric connection area (2) is conductively connected with the second electric connection area (3). According to the current guide block, the phenomenon of insufficient soldering of the tab and the busbar can be effectively avoided, and the welding efficiency of the tab and the busbar is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a current guide block, a cell module, a battery module, and a battery pack. Background Technology

[0002] With the continuous advancement of energy technology, all-solid-state batteries have gradually become a research hotspot in the battery field due to their advantages such as high energy density, safety, and long lifespan. Compared to traditional liquid lithium-ion batteries, all-solid-state batteries use solid electrolytes instead of flammable liquid electrolytes, greatly improving the overall safety and reliability of the battery.

[0003] Solid-state batteries, due to the characteristics of solid electrolytes, have shown significant advantages in safety, energy density, operating temperature range, and environmental performance, making them an important direction for future battery technology development. However, solid-state batteries currently face some technical challenges in large-scale production, especially the connection and welding process between the cells and the busbars.

[0004] Solid-state battery tabs are typically made of thin sheets with good conductivity. However, due to their soft texture, traditional welding methods can easily cause the tabs to deform due to insufficient support, leading to poor contact with the busbar and resulting in a cold solder joint. A cold solder joint degrades battery performance, including reduced conductivity, increased internal resistance, and shortened battery life. Utility Model Content

[0005] The main purpose of this utility model is to provide a current guide block, a cell module, a battery module, and a battery pack, which can effectively avoid the phenomenon of poor soldering between the tabs and the busbars and improve the welding efficiency between the tabs and the busbars.

[0006] To achieve the above objectives, according to one aspect of the present invention, a flow guide block is provided for connecting a tab to a busbar. The flow guide block includes a body, and a first electrical connection area and a second electrical connection area are provided on the same side of the body. The first electrical connection area is configured to be electrically connected to the tab, and the second electrical connection area is configured to be electrically connected to the busbar. The height of the first electrical connection area is lower than the height of the second electrical connection area, and the height difference between the first electrical connection area and the second electrical connection area is greater than or equal to the thickness of the tab. The first electrical connection area and the second electrical connection area are electrically connected.

[0007] Furthermore, both the first electrical connection region and the second electrical connection region are planar; and / or, the side of the body away from the first electrical connection region and the second electrical connection region is planar.

[0008] Furthermore, a second electrical connection area is provided on each of the two opposite sides of the first electrical connection area.

[0009] Furthermore, a through groove is provided in the middle of the first electrical connection area. The through groove extends from one of the second electrical connection areas to the other and divides the first electrical connection area into a first partition and a second partition. The angle between the arrangement direction of the first partition and the second partition and the arrangement direction of the second electrical connection area is greater than 45°.

[0010] Furthermore, the arrangement direction of the first and second partitions is perpendicular to the arrangement direction of the second electrical connection area.

[0011] Furthermore, the current guide block is a conductive component made of conductive material.

[0012] According to another aspect of the present invention, a battery cell module is provided, including a battery cell unit and the aforementioned current guide block. The battery cell unit includes a tab, and the tab is electrically connected to a first electrical connection area of ​​the current guide block.

[0013] Furthermore, the number of individual battery cells is at least one, the current guide block is located at the end of the individual battery cell, and the electrode tab is located in the first electrical connection area and is welded and fixed to the first electrical connection area.

[0014] Furthermore, when a through groove is provided in the middle of the first electrical connection area, at least one tab of a battery cell extends out of the through groove and is bent and bonded to the first electrical connection area on the side where the tab is located before being welded and fixed; or, the number of battery cells is at least two, and the tabs of at least two battery cells are bent and bonded to the first electrical connection area from the same side of the current guide block before being welded and fixed; or, the number of battery cells is at least two, and the tabs of at least two battery cells are bent and bonded to the first electrical connection area from opposite sides of the current guide block before being welded and fixed.

[0015] Furthermore, the number of individual battery cells is at least one, and the battery cell module also includes a heat-conducting housing. The individual battery cells are disposed inside the heat-conducting housing, and an insulating component is provided at the end of the heat-conducting housing. A clearance groove is provided on the insulating component corresponding to the tab. A current-guiding block is fixedly disposed on the insulating component, and the first electrical connection area of ​​the current-guiding block is provided corresponding to the clearance groove.

[0016] Furthermore, the top and / or bottom of the heat-conducting housing are provided with reinforcing ribs extending along the length of the heat-conducting housing.

[0017] According to another aspect of the present invention, a battery module is provided, including a busbar and a current guide block or a cell module as described above, wherein the busbar is electrically connected to a second electrical connection area of ​​the current guide block.

[0018] Furthermore, the busbar includes a first half-section and a second half-section, which are connected by a bend. Both the first and second half-sections include a third electrical connection area that is electrically connected to the second electrical connection area. The first and second half-sections are each electrically connected to a guide block.

[0019] Furthermore, a fixing hole is provided in the first half-zone and the second half-zone respectively, and the fixing holes in the first half-zone and the second half-zone are diagonally arranged on the busbar.

[0020] Furthermore, the battery module also includes an insulating bracket with mounting slots and spacers. Busbars are installed in the mounting slots, and adjacent busbars are separated by spacers. The busbars are integrated on the insulating bracket and form an integrated cover plate with the insulating bracket.

[0021] Furthermore, the battery module also includes end plates and binding straps. There are multiple cell modules stacked together. The end plates are set on both sides of the cell modules along the stacking direction of the cell modules. The binding straps are tied to the end plates and cell modules. A base is provided on the end plates. An output electrode is provided at the end of the integrated cover plate and connected to the base.

[0022] According to another aspect of the present invention, a battery pack is provided, including the above-described cell module or the above-described battery module.

[0023] In this embodiment of the invention, the electrode tab is not directly electrically connected to the busbar, but rather electrically connected to the busbar through a current guide block. This allows for electrical connection between the electrode tab and the current guide block, and vice versa. After the electrode tab and current guide block are electrically connected, the current guide block becomes the welding target of the busbar. Because the current guide block itself has good structural rigidity, the second electrical connection area provides strong support during welding. This prevents the material from being too soft and affecting the electrical connection quality between the current guide block and the busbar. The structure of the current guide block can improve the problem of incomplete welding between the electrode tab and the busbar caused by the softness of the electrode tab, effectively avoiding cold solder joints and improving welding quality. Since the electrical connection quality between the current guide block and the busbar is less affected by the current guide block, and the structure of the current guide block improves the electrical connection quality, the welding between the current guide block and the busbar can be mass-produced, facilitating the mass assembly and welding of the battery cell and the busbar. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a three-dimensional structural diagram of the guide block according to an embodiment of the present utility model;

[0026] Figure 2 This is a three-dimensional structural diagram of a single battery cell according to an embodiment of the present invention;

[0027] Figure 3 This is a three-dimensional structural diagram of the battery cell module according to an embodiment of the present utility model;

[0028] Figure 4 This is a three-dimensional structural diagram of the battery cell module according to an embodiment of the present utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of the busbar according to an embodiment of the present utility model;

[0030] Figure 6 This is a three-dimensional structural diagram of the integrated cover plate according to an embodiment of the present utility model;

[0031] Figure 7 This is a three-dimensional structural view of the battery module before the integrated cover plate is assembled according to an embodiment of this utility model;

[0032] Figure 8 This is a three-dimensional structural diagram of the battery module according to an embodiment of the present utility model.

[0033] The above figures include the following reference numerals:

[0034] 1. Body; 2. First electrical connection area; 3. Second electrical connection area; 4. Through slot; 5. First partition; 6. Second partition; 7. Electrode tab; 8. Busbar; 9. Guide block; 10. Individual cell; 11. Cell module; 12. Heat-conducting shell; 13. Connection hole; 14. Insulating component; 15. Clearance groove; 16. Reinforcing rib; 17. First half-zone; 18. Second half-zone; 19. Bending section; 20. Third electrical connection area; 21. Fixing hole; 22. Insulating bracket; 23. Mounting groove; 24. Spacer post; 25. End plate; 26. Binding strap; 27. Base; 28. Output electrode; 29. ​​Fixing post. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] See also Figures 1 to 8 As shown in the embodiment of the present invention, the guide block is used to connect the tab and the busbar. The guide block includes a body, and a first electrical connection area and a second electrical connection area are provided on the same side of the body. The first electrical connection area is configured to be electrically connected to the tab, and the second electrical connection area is configured to be electrically connected to the busbar. The height of the first electrical connection area is lower than the height of the second electrical connection area. The height difference between the first electrical connection area and the second electrical connection area is greater than or equal to the thickness of the tab. The first electrical connection area and the second electrical connection area are electrically connected.

[0037] In this embodiment, the tab 7 is not directly electrically connected to the busbar 8, but is electrically connected to the busbar 8 through the guide block 9, thus electrically connecting the tab 7 to the guide block 9, and the guide block 9 to the busbar 8. After the tab 7 is electrically connected to the guide block 9, the welding object of the busbar 8 is adjusted to the guide block 9. Since the guide block 9 itself has good structural rigidity, the second electrical connection area 3 can have strong support during welding. During the connection, the electrical connection quality between the guide block 9 and the busbar 8 will not be affected by the material being too soft. The structure of the guide block 9 can be used to improve the problem of poor welding between the tab 7 and the busbar 8 caused by the soft structure of the tab 7, effectively avoiding the problem of cold welding and improving the welding quality. Since the electrical connection quality between the current guide block 9 and the busbar 8 is less affected by the current guide block 9, and the structure of the current guide block 9 can improve the electrical connection quality between the current guide block 9 and the busbar 8, the welding between the current guide block 9 and the busbar 8 can be mass-produced during the welding process, which facilitates the mass assembly welding between the battery cell and the busbar.

[0038] Taking the welding of tab 7 to guide block 9 and guide block 9 to busbar 8 as an example, the guide block 9 effectively achieves a stable connection between tab 7 and busbar 8 through the height difference design of the first electrical connection area 2 and the second electrical connection area 3 on its body 1. The first electrical connection area 2 is lower than the second electrical connection area 3, and the height difference between the first electrical connection area and the second electrical connection area is greater than or equal to the thickness of tab. When tab 7 is set in the first electrical connection area 2 and electrically connected to the first electrical connection area 2, the height of tab 7 will not exceed the height of the second electrical connection area 3. Therefore, the welding of tab 7 to guide block 9 will not interfere with the welding of busbar 8 to guide block 9, thus ensuring the welding quality between busbar 8 and guide block 9.

[0039] The first electrical connection area and the second electrical connection area are located on the same side of the body, so that the welding of the tab 7 to the guide block 9 and the welding of the busbar 8 to the guide block 9 are both located on the outside of the guide block 9, which facilitates the welding operation and reduces the welding difficulty.

[0040] The tab 7 is attached to and welded to the first electrical connection area 2, ensuring that the tab 7 is fully supported and flatly fitted during the welding process, avoiding the occurrence of incomplete welding, and improving the welding quality and connection reliability. The conductive connection between the first electrical connection area 2 and the second electrical connection area 3 ensures that the current can be smoothly transferred from the tab 7 of the cell to the busbar 8, thereby improving the overall conductivity and structural stability of the solid-state battery module. During the battery assembly process, this structural design makes the connection between the cell and the busbar 8 more convenient and efficient, providing technical support for the large-scale production of solid-state batteries and facilitating the mass production of solid-state batteries.

[0041] In one embodiment, both the first electrical connection region and the second electrical connection region are planar.

[0042] The first electrical connection area 2 and the second electrical connection area 3 are designed as planes. This structure ensures that the contact area between the electrode 7 and the first electrical connection area 2, as well as between the current guide block 9 and the busbar 8, is maximized. This provides a stable and uniform current path during the welding process, enhances the reliability and conductivity of the electrical connection, and the planar design also facilitates the operation of automated welding equipment, improving production efficiency and consistency.

[0043] In one embodiment, the side of the body opposite to the first electrical connection region and the second electrical connection region is a plane.

[0044] The side of the main body 1 that is away from the first electrical connection area 2 and the second electrical connection area 3 is designed as a plane. This structural feature is conducive to the precise fitting and stable installation of the current guide block 9 with the heat conduction component or other structural components during the battery assembly process. It simplifies the assembly process, ensures the neatness of the battery module in spatial layout and the consistency of electrical connections, thereby improving the performance and reliability of the overall system.

[0045] In one embodiment, a second electrical connection region is provided on each of the two opposite sides of the first electrical connection region.

[0046] The first electrical connection area 2 has two opposite sides with second electrical connection areas 3, which not only increases the contact area with the busbar 8, ensuring efficient and stable current transmission, but also disperses welding stress by setting them on opposite sides, reducing welding defects caused by local overheating. When the two second electrical connection areas 3 are located on opposite sides of the first electrical connection area 2, the first electrical connection area 2 can be positioned in the middle. The fixed connection between the two second electrical connection areas 3 on both sides and the busbar 8 ensures the connection quality between the battery cell and the busbar 8. The structural distribution is more reasonable, the connection structure is more stable, and the current transmission is more stable and reliable.

[0047] In one embodiment, a through groove is provided at the middle position of the first electrical connection area. The through groove extends from one of the second electrical connection areas to the other and divides the first electrical connection area into a first partition and a second partition. The angle between the arrangement direction of the first partition and the second partition and the arrangement direction of the second electrical connection area is greater than 45°.

[0048] The through slot 4 in the middle of the first electrical connection area 2 not only allows the tabs 7 of the battery cell 10 to pass through and be welded to the first partition 5 and the second partition 6 respectively, realizing the parallel connection between the battery cells 10, but also, since the angle between the first partition 5 and the second partition 6 and the second electrical connection area 3 is greater than 45°, the current of the tab 7 of one battery cell 10 flows through the first partition 5 to the second electrical connection areas 3 on both sides, and the current of the tab 7 of the other battery cell 10 flows through the second partition 6 to the second electrical connection areas 3 on both sides. The connection position and current flow direction of the tabs 7 on the first electrical connection area 2 are different. This structural design helps to disperse the current during the welding process, reduce heat concentration, thereby improving the welding quality and efficiency. At the same time, it enhances the thermal stability and structural strength of the current guide block 9 when bearing current, ensuring the safety and performance stability of the solid-state battery module during use.

[0049] The through slot 4 in the middle of the first electrical connection area 2 can be one or more, for the electrode tab 7 to pass through. The first electrical connection area 2 can also be a single structure without a through slot 4 in the middle.

[0050] When the first electrical connection area 2 is not provided with a through slot 4, the two tabs 7 pass through the left or right side of the first electrical connection area of ​​the guide block 9, or simultaneously from both sides, and then bend and weld together with the first electrical connection area of ​​the guide block 9.

[0051] When one or more through slots 4 are provided in the middle of the first electrical connection area 2, the electrode 7 passes through the through slot 4 and is bent to be welded to the first electrical connection area on the left, the first electrical connection area on the right, or the first electrical connection areas on both sides of the through slot 4. Alternatively, the electrode 7 passes through the first electrical connection area of ​​the guide block 9 from the left, the right, or both sides at the same time and is bent to be welded to the first electrical connection area of ​​the guide block 9. For example, when there are two tabs 7 and one through slot 4, after the two tabs 7 emerge from the through slot 4, one bends towards the first partition 5 and is welded to the first partition 5, and the other bends towards the second partition 6 and is welded to the second partition 6; or after the two tabs emerge from the through slot 4, they bend towards the first partition 5 together and are welded to the first partition 5, or they bend towards the second partition 6 together and are welded to the second partition 6; or the two tabs 7 emerge from the first or second side of the guide block 9 together, bend towards the first partition 5 together and are welded to the first partition 5; or the two tabs 7 emerge from the first or second side of the guide block 9 together, bend towards the second partition 6 together and are welded to the second partition 6; or one of the two tabs 7 emerges from the first side of the guide block 9, bends towards the first partition 5 and is welded to the first partition 5, and the other emerges from the second side of the guide block 9, bends towards the second partition 6 and is welded to the second partition 6.

[0052] In one embodiment, the arrangement direction of the first and second partitions is perpendicular to the arrangement direction of the second electrical connection area.

[0053] The design of the first partition 5 and the second partition 6 being perpendicular to the arrangement direction of the second electrical connection area 3 effectively disperses the thermal and electrical stresses during welding, ensuring a firm connection between the tab 7 and the current guide block 9. At the same time, the vertical arrangement helps to optimize the current path and reduce the lateral flow of current inside the current guide block 9, thereby improving the efficiency and stability of current transmission and enhancing the performance and safety of the solid-state battery module when used in parallel.

[0054] In one embodiment, the current guide block is a conductive element made of a conductive material.

[0055] The current guide block 9 is made of conductive material and plays a key role in current collection and distribution in the solid-state battery module. Its conductivity ensures efficient current transmission between the tab 7 and the busbar 8. At the same time, during battery assembly and current cycling, the material properties of the current guide block 9 ensure the stability of the structure and the continuity of the conductive path, effectively improving the overall conductivity efficiency and operational reliability of the module.

[0056] In some embodiments, the flow guide block 9 may also be provided with conductive structures in the first electrical connection area 2 and the second electrical connection area 3. The first electrical connection area 2 and the second electrical connection area 3 are electrically connected by conductive busbars or electrical connection plates, etc., and other positions of the flow guide block 9 are made of insulating material.

[0057] See also Figures 3 to 8 As shown, according to an embodiment of the present invention, the battery cell module includes a battery cell unit and the aforementioned current guide block. The battery cell unit includes a tab, and the tab is electrically connected to the first electrical connection area of ​​the current guide block.

[0058] The cell module 11 integrates a single cell 10 and a current guide block 9. The tab 7 of the single cell 10 and the first electrical connection area 2 of the current guide block 9 form a stable electrical contact. This not only simplifies the electrical connection structure within the module, but also optimizes the current distribution through the conductivity of the current guide block 9, effectively reducing resistance and heat generation. This improves the energy conversion efficiency and thermal management capability of the cell module during charging and discharging, and enhances the overall performance and lifespan of the solid-state battery module.

[0059] The battery cell 10 and the current guide block 9 are combined to form a battery cell module, which makes the structure of each battery module consistent and uniform. The production of battery modules can be modularized, which facilitates assembly and mass production, effectively improving production efficiency and assembly efficiency.

[0060] In one embodiment, the number of battery cells 10 is at least one, and the current guide block 9 is disposed at the end of the battery cell 10 and supported by the end of the battery cell 10. Specifically, the current guide block 9 is disposed at the root of the tab 7, thereby facilitating the cooperation between the tab 7 and the current guide block 9. The end of the tab 7 is located in the first electrical connection area 2 and is welded and fixed to the first electrical connection area 2.

[0061] In one embodiment, the number of battery cells is at least two, with two adjacent battery cells stacked together and a buffer layer provided between two adjacent battery cells.

[0062] By stacking at least two individual cells 10 and separating them with a buffer layer, and with the design of the current guide block 9 at the end of the individual cell 10, the tab 7 is precisely positioned in the first electrical connection area 2 and welded thereto, ensuring stable and efficient current transfer between cells. At the same time, the buffer layer absorbs the stress changes caused by the expansion or contraction of the cells, maintains the integrity of the module structure, and significantly improves the reliability and durability of the solid-state battery module under dynamic working conditions.

[0063] In one embodiment, the number of battery cells 10 is at least two, two adjacent battery cells 10 are stacked, and no buffer layer is provided between two adjacent battery cells, but the buffer layer is located between two adjacent battery cell modules.

[0064] In one embodiment, when a through groove 4 is provided in the middle of the first electrical connection area 2, the tab 7 of at least one battery cell 10 extends out of the through groove 4 and is bent and welded to the first electrical connection area 2 on the side where the tab 7 is located; or, the number of battery cell 10 is at least two, and the tabs 7 of at least two battery cell 10 are bent and welded to the first electrical connection area 2 from the same side of the current guide block 9; or, the number of battery cell 10 is at least two, and the tabs 7 of at least two battery cell 10 are bent and welded to the first electrical connection area 2 from opposite sides of the current guide block 9 respectively.

[0065] When a through groove 4 is provided in the middle of the first electrical connection area 2, at least one tab 7 of a battery cell 10 passes through the through groove 4 and is bent and attached to the first electrical connection area 2. Alternatively, if there are at least two battery cells 10, the tabs 7 of at least two battery cells 10 are bent from the same side or opposite side of the current guide block 9 and then welded. This flexible tab arrangement and welding strategy not only optimizes the current path and reduces resistance, but also ensures the stability of the welding. At the same time, it improves thermal management and prevents local overheating by dispersing the current, which greatly enhances the electrical performance, safety and manufacturing process flexibility of the solid-state battery module.

[0066] In one embodiment, the number of individual battery cells is at least one, and the battery cell module further includes a heat-conducting housing 12. The individual battery cell 10 is disposed inside the heat-conducting housing 12. An insulating member 14 is provided at the end of the heat-conducting housing 12. A clearance groove 15 is provided on the insulating member 14 corresponding to the tab 7. A current guide block 9 is fixedly disposed on the insulating member 14. The first electrical connection area 2 of the current guide block 9 is provided corresponding to the clearance groove 15.

[0067] In this embodiment, the battery cell module includes at least one battery cell 10. The battery cell 10 and the current guide block 9 are precisely aligned through the clearance groove 15 on the insulating member 14, which avoids the setting of the insulating member 14 from obstructing the exit of the tab 7 and ensures the reliable welding of the tab 7 and the first electrical connection area 2.

[0068] In one embodiment, the thermally conductive housing 12 includes a connecting plate that is in contact with the large surface of the adjacent battery cell 10. The thermally conductive housing 12 utilizes the connecting plate to achieve thermally conductive cooperation with the battery cell 10, effectively dispersing heat and enhancing the thermal stability of the solid-state battery module during high-power cycling.

[0069] The insulating parts 14 at both ends of the heat-conducting shell 12 can not only facilitate the installation and fixation of the flow guide block 9 and provide support for the flow guide block 9, but also enhance the structural strength of both ends of the heat-conducting shell 12.

[0070] When the number of battery cells 10 is at least two, in one embodiment, at least two battery cells 10 with a flow guide block 9 are installed inside the heat-conducting housing 12. The at least two battery cells 10 are located on opposite sides of the connecting plate, and the large surfaces of the two battery cells 10 adjacent to the connecting plate are in contact with the connecting plate, thereby increasing the heat dissipation contact area between the heat-conducting housing 12 and the battery cells 10, and improving the heat dissipation efficiency of the battery cells 10. The flow guide block 9 is installed on the heat-conducting housing 12 and forms a structural unit similar to a square shell structure with the heat-conducting housing 12. The flow guide block 9 and the heat-conducting housing 12 can cooperate to improve the heat conduction efficiency and structural strength of the battery cell module 11. In one embodiment, at least two battery cells 10 are installed inside the heat-conducting housing 12 and located on the same side of the connecting plate. The large surfaces of the battery cells 10 adjacent to the connecting plate are in contact with the connecting plate, thereby increasing the contact area between the battery cells 10 and the heat-conducting housing 12, and improving the heat dissipation efficiency of the battery cells 10.

[0071] In one embodiment, the top and / or bottom of the heat-conducting housing are provided with reinforcing ribs extending along the length of the heat-conducting housing.

[0072] In one embodiment, the connecting plate of the heat-conducting housing 12 has a top plate at the top and a bottom plate at the bottom. The top plate is connected to the top of the connecting plate and extends to both sides from the top of the connecting plate. The bottom plate is connected to the bottom of the connecting plate and extends to both sides from the bottom of the connecting plate, forming a mounting groove for accommodating the battery cell 10. In this embodiment, the heat-conducting housing has an H-shaped structure. Reinforcing ribs are provided at the top of the top plate or the bottom of the bottom plate.

[0073] In one embodiment, the connecting plate of the heat-conducting housing 12 has a top plate at the top and a bottom plate at the bottom. The top plate is connected to the top of the connecting plate and extends to one side from the top of the connecting plate. The bottom plate is connected to the bottom of the connecting plate and extends to one side from the bottom of the connecting plate. The top plate and the bottom plate extend in the same direction on the connecting plate, forming a mounting groove for accommodating the battery cell 10. In this embodiment, the heat-conducting housing has a C-shaped structure.

[0074] Reinforcing ribs 16 extending along the length of the heat-conducting housing 12 are provided at the top and / or bottom, significantly enhancing the structural rigidity of the housing and effectively preventing deformation caused by external forces or thermal expansion and contraction during the assembly and use of the cell module. This ensures stable contact between the cell 10 and the current guide block 9, improving the reliability of the electrical connection. Simultaneously, the design of the reinforcing ribs helps guide and optimize the heat flow path, improving the thermal management performance of the cell module and ensuring the safety and durability of the solid-state battery module under various operating conditions. During the assembly of the cell module, the reinforcing ribs 16 also serve a guiding function, improving the assembly efficiency of the cell module 11.

[0075] See also Figures 3 to 8 As shown, according to an embodiment of the present invention, the battery module includes a busbar and the aforementioned current guide block or the aforementioned battery cell module, wherein the busbar is electrically connected to the second electrical connection area of ​​the current guide block.

[0076] The battery module establishes a reliable electrical connection through the second electrical connection area 3 of the busbar 8 and the current guide block 9, realizing efficient current collection and distribution between the cell modules 11. The layout of the busbar 8 optimizes the electrical performance of the entire module, reduces internal resistance, and promotes uniform heat dissipation. Combined with the positioning and support function of the current guide block 9, it can effectively improve the assembly and welding between the busbar 8 and the cell module 11, making it easier to achieve mass production and promote the application of solid-state batteries.

[0077] In one embodiment, a buffer layer is provided between adjacent battery cell modules 11. The buffer layer is, for example, a buffer foam, which can absorb stress changes caused by the expansion or contraction of the battery cell.

[0078] In one embodiment, the busbar 8 includes a first half-section 17 and a second half-section 18, which are connected by a bend 19. Both the first half-section 17 and the second half-section 18 include a third electrical connection area 20 that is electrically connected to the second electrical connection area 3. The first half-section 17 and the second half-section 18 are respectively electrically connected to a guide block 9.

[0079] Busbar 8 includes a first half-region 17 and a second half-region 18 connected by a bending section 19. Each half-region is provided with a third electrical connection area 20 connected to the second electrical connection area 3 of the current guide block 9, allowing busbar 8 to form a stable electrical contact with the two independent current guide blocks 9. The design of the bending section 19 provides additional deformation space for busbar 8 when the battery module expands due to heat or contracts due to cooling, effectively avoiding connection failure caused by thermal stress, ensuring the continuity of current and the mechanical stability of the module, and improving the overall performance and reliability of the solid-state battery module under temperature change conditions.

[0080] In one embodiment, the first half-zone 17 and the second half-zone 18 are each provided with a fixing hole 21, and the fixing holes 21 of the first half-zone 17 and the second half-zone 18 are diagonally arranged on the busbar 8.

[0081] The fixing holes 21 diagonally arranged on the first half-section 17 and the second half-section 18 of the busbar 8 form a stable anchor point. When the busbar 8 is connected to the guide block 9 or other structures of the battery module, this diagonally distributed fixing mode can significantly enhance the structural stability of the busbar, reduce displacement caused by vibration or thermal stress, ensure the reliability of electrical connection and the mechanical integrity of the entire battery module under long-term operation, and thus improve the overall performance and safety of the system.

[0082] In one embodiment, the first half-region and the second half-region are each provided with at least two fixing holes 21.

[0083] In one embodiment, the battery module further includes an insulating bracket with a mounting groove and spacers. A busbar is installed in the mounting groove, and adjacent busbars are separated by spacers. The busbars are integrated on the insulating bracket and form an integrated cover plate with the insulating bracket.

[0084] The insulating bracket 22 secures the busbar 8 via the mounting slot 23 and uses spacer posts 24 to maintain precise electrical spacing between adjacent busbars 8. This integrated cover design greatly simplifies the battery module assembly process, improves production efficiency, and ensures the safety and stability of electrical connections. Even in high-power charge and discharge cycles, it can effectively prevent short-circuit risks, improve the overall performance and reliability of solid-state battery modules, and lay a solid foundation for subsequent large-scale production and application.

[0085] In one embodiment, the busbar 8 and the insulating bracket 22 are fixedly connected by riveting, snap-fitting or screwing, and the insulating bracket 22 is, for example, a plastic bracket.

[0086] In one embodiment, the bottom wall of the mounting groove 23 has an opening, the third electrical connection area 20 of the busbar 8 is located within the opening area, and a fixing post 29 is provided on the bottom wall of the mounting groove. The fixing hole 21 on the busbar 8 cooperates with the fixing post 29 to achieve the installation and fixation of the busbar 8. The fixing hole 21 and the fixing post 29 can be an interference fit or a clearance fit, and then fixed by adhesive or other means.

[0087] In one embodiment, the battery module further includes an end plate 25 and a strap 26. There are multiple cell modules 11 stacked together. The end plate 25 is disposed on both sides of the cell module 11 along the stacking direction of the cell module 11. The strap 26 is tied to the end plate 25 and the cell module 11. A base 27 is disposed on the end plate 25. An output electrode 28 is disposed at the end of the integrated cover plate and is connected to the base 27.

[0088] By combining the end plate 25 and the binding strap 26, a pre-tightening force can be applied in the stacking direction of the cell module 11. The electrical connection between the output electrode 28 of the integrated cover plate and the base 27 of the end plate 25 not only simplifies the external interface design of the module, but also ensures efficient current transmission. Combined with the optimization of the overall structure, the mechanical strength and electrical performance of the battery module are significantly improved.

[0089] In one embodiment, a connecting hole 13 is provided on the upper side of the end plate 25, and the base 27 is bolted into the connecting hole 13 to achieve a fixed connection with the end plate 25. A mounting hole is provided on one side of the base 27 along the width direction of the end plate 25, and the length of the base 27 on this side is less than the width of the end plate 25, forming a step between the base 27 and the end plate 25 on this side. The output pole 28 is disposed within this step and is fixedly connected to the base 27 through the mounting hole on the base 27.

[0090] The end plate 25 and the base 27 are securely connected through the connecting hole 13 and bolts. The base 27 has a stepped design in the width direction of the end plate 25, which provides precise positioning and installation space for the output pole 28. This ensures that even during frequent charge and discharge cycles of the battery module, the connection between the output pole 28 and the base 27 will not loosen due to mechanical stress, effectively maintaining the reliability of the electrical connection. Secondly, the stepped design optimizes the wiring path of the output pole 28, reduces external interference, and improves the integration and overall performance of the battery module. Thirdly, the segmented design of the end plate 25 and the base 27 reduces the deformation of the end plate 25 during module assembly, reducing the difficulty of the process.

[0091] According to an embodiment of the present invention, the battery pack includes the above-described cell module or the above-described battery module.

[0092] 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.

[0093] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[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 flow guide block, characterized in that, For connecting the tab (7) to the busbar (8), the guide block includes a body (1), on the same side of the body (1) are a first electrical connection area (2) and a second electrical connection area (3). The first electrical connection area (2) is configured to be electrically connected to the tab (7), and the second electrical connection area (3) is configured to be electrically connected to the busbar (8). The height of the first electrical connection area (2) is lower than the height of the second electrical connection area (3). The height difference between the first electrical connection area (2) and the second electrical connection area (3) is greater than or equal to the thickness of the tab (7). The first electrical connection area (2) and the second electrical connection area (3) are electrically connected.

2. The guide block according to claim 1, characterized in that, The first electrical connection area (2) and the second electrical connection area (3) are both planar; and / or, the side of the body (1) facing away from the first electrical connection area (2) and the second electrical connection area (3) is planar.

3. The guide block according to claim 1, characterized in that, The second electrical connection area (3) is provided on two opposite sides of the first electrical connection area (2).

4. The guide block according to claim 3, characterized in that, A through groove (4) is provided in the middle of the first electrical connection area (2). The through groove (4) extends from one of the second electrical connection areas (3) to the other second electrical connection area (3) and divides the first electrical connection area (2) into a first partition (5) and a second partition (6). The angle between the arrangement direction of the first partition (5) and the second partition (6) and the arrangement direction of the second electrical connection area (3) is greater than 45°.

5. The guide block according to claim 4, characterized in that, The arrangement directions of the first partition (5) and the second partition (6) are perpendicular to the arrangement direction of the second electrical connection area (3).

6. The guide block according to any one of claims 1 to 5, characterized in that, The flow guide block is a conductive component made of conductive material.

7. A battery cell module, characterized in that, It includes a battery cell (10) and a current guide block (9) according to any one of claims 1 to 6, wherein the battery cell (10) includes a tab (7) and the tab (7) is electrically connected to a first electrical connection region (2) of the current guide block (9).

8. The cell module according to claim 7, characterized in that, The number of battery cell units (10) is at least one, the current guide block (9) is located at the end of the battery cell unit (10), and the electrode tab (7) is located in the first electrical connection area (2) and is welded and fixed to the first electrical connection area (2).

9. The cell module according to claim 8, characterized in that, When a through groove (4) is provided in the middle of the first electrical connection area (2), at least one tab (7) of the battery cell (10) passes through the through groove (4) and is bent and welded to the first electrical connection area (2) on the side where the tab (7) is located; or, the number of battery cells (10) is at least two, and the tabs (7) of at least two battery cells (10) are bent and welded to the first electrical connection area (2) from the same side of the current guide block (9); or, the number of battery cells (10) is at least two, and the tabs (7) of at least two battery cells (10) are bent and welded to the first electrical connection area (2) from opposite sides of the current guide block (9).

10. The cell module according to claim 7, characterized in that, The number of battery cell units (10) is at least one. The battery cell module also includes a heat-conducting housing (12). The battery cell units (10) are disposed inside the heat-conducting housing (12). An insulating member (14) is provided at the end of the heat-conducting housing. A clearance groove (15) is provided on the insulating member (14) corresponding to the tab (7). The current guide block (9) is fixedly disposed on the insulating member (14). The first electrical connection area (2) of the current guide block (9) is provided corresponding to the clearance groove (15).

11. The cell module according to claim 10, characterized in that, The top and / or bottom of the heat-conducting housing (12) are provided with reinforcing ribs (16) extending along the length direction of the heat-conducting housing (12).

12. A battery module, comprising a busbar (8), characterized in that, It also includes a current guide block (9) according to any one of claims 1 to 6 or a cell module according to any one of claims 7 to 11, wherein the busbar (8) is electrically connected to the second electrical connection area (3) of the current guide block (9).

13. The battery module according to claim 12, characterized in that, The busbar (8) includes a first half-section (17) and a second half-section (18), which are connected by a bend (19). Both the first half-section (17) and the second half-section (18) include a third electrical connection area (20) that is electrically connected to the second electrical connection area (3). The first half-section (17) and the second half-section (18) are respectively electrically connected to one of the flow guide blocks (9).

14. The battery module according to claim 13, characterized in that, The first half-section (17) and the second half-section (18) are each provided with a fixing hole (21), and the fixing holes (21) of the first half-section (17) and the second half-section (18) are diagonally arranged on the busbar (8).

15. The battery module according to claim 12, characterized in that, The battery module also includes an insulating bracket (22), which is provided with a mounting groove (23) and a spacer post (24). The busbar (8) is installed in the mounting groove (23), and adjacent busbars (8) are separated by the spacer post (24). The busbar (8) is integrated on the insulating bracket (22) and forms an integrated cover plate with the insulating bracket (22).

16. The battery module according to claim 15, characterized in that, The battery module also includes an end plate (25) and a strap (26). There are multiple battery cell modules stacked together. The end plate (25) is arranged on both sides of the battery cell module along the stacking direction of the battery cell module. The strap (26) is tied to the end plate (25) and the battery cell module. A base (27) is provided on the end plate (25). An output electrode (28) is provided at the end of the integrated cover plate. The output electrode (28) is connected to the base (27).

17. A battery pack, characterized in that, It includes the cell module according to any one of claims 7 to 11 or the battery module according to any one of claims 12 to 16.

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