Middle end plate for battery module and battery module
By setting up an intermediate end plate between two adjacent submodules of the battery module, the problem of high composition cost of existing battery PACK long molds is solved, and the effect of reducing costs and increasing energy density is achieved.
Patent Information
- Application Number
- CN202421503970.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The existing battery PACK long module has high costs due to the increase in required parts and the increase in production processes.
By setting up intermediate end plates between two adjacent submodules, the two short modules are connected to form a long module, reducing the need for fixing and laser welding of the side aluminum plates, and reducing costs and weight are reduced by setting up a lifting structure on the sides of the intermediate end plate and a weight reduction structure on the end surface.
It reduces the production cost of the battery module, reduces the number of parts and processing processes, improves the energy density, and reduces the weight of the battery module.
Smart Images
Figure CN222896776U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and specifically provides an intermediate end plate for a battery module and a battery module. Background Art
[0002] As battery packs are becoming longer and have larger capacities, the size of the battery cells has increased and the modules have become longer. Modules longer than 1 meter are generally automotive pack modules, which require additional side aluminum plates for fixing and laser welding, resulting in higher production costs for the pack modules.
[0003] For energy storage PACK, modules less than 1 meter are generally used. Due to the current market demand for large-capacity PACK, the capacity of battery cells and the number of modules in the PACK have increased. This requires the use of multiple short modules in series to form a long module, which increases the number of module beams, fixing bolts, etc. required for the module, and the number of processes also increases accordingly, resulting in increased costs. At the same time, the use of more modules also has a certain amount of space waste, which is not conducive to improving energy density and reducing costs and increasing efficiency. Utility Model Content
[0004] The utility model aims to solve the above technical problems at least to a certain extent, that is, to solve at least to a certain extent the problem that the existing PACK long module has a higher cost due to the increase in required parts and the increase in production processes.
[0005] In a first aspect, the utility model provides an intermediate end plate for a battery module, the battery module comprising at least two sub-modules, the intermediate end plate being used to connect two adjacent sub-modules, wherein the intermediate end plate has a first end face and a second end face arranged opposite to each other, the intermediate end plate being located between two adjacent sub-modules and the two adjacent sub-modules being respectively connected to the first end face and the second end face.
[0006] In the preferred technical solution of the intermediate end plate for the battery module, the intermediate end plate further has a side surface located between the first end surface and the second end surface, and a lifting structure is provided on the side surface.
[0007] In the above-mentioned preferred technical solution for the intermediate end plate of the battery module, the side includes a first side wall and a second side wall that are arranged opposite to each other and extend in the vertical direction, and the lifting structure is arranged on the first side wall and / or the second side wall; and / or the lifting structure is a lifting hole.
[0008] In the preferred technical solution of the intermediate end plate for the battery module, the number of the hoisting holes is multiple and the multiple hoisting holes are spaced apart along the vertical direction on the first side wall and / or the second side wall.
[0009] In the above-mentioned preferred technical solution for the intermediate end plate of the battery module, the battery module also includes a cable tie, and an avoidance gap adapted to the cable tie is provided between at least two adjacent lifting structures, and when assembled, a portion of the cable tie is located in the avoidance gap.
[0010] In the above preferred technical solution of the intermediate end plate for the battery module, a weight reduction structure is further provided on the first end surface and / or the second end surface.
[0011] In the above-mentioned preferred technical solution for the intermediate end plate of the battery module, a weight reduction area and a connection area are provided on the first end face and / or the second end face, the weight reduction structure is provided in the weight reduction area, and the sub-module is connected to the first end face and / or the second end face through the connection area; and / or the weight reduction structure includes a first weight reduction groove provided on the first end face and a second weight reduction groove provided on the second end face, and the projection of the first weight reduction groove on the second end face does not overlap with the second weight reduction groove.
[0012] In the preferred technical solution of the intermediate end plate for the battery module, the material of the intermediate end plate is a composite material.
[0013] In the preferred technical solution of the intermediate end plate for the battery module, the material of the intermediate end plate is glass fiber reinforced composite material.
[0014] In a second aspect, the utility model further provides a battery module, which includes: at least two sub-modules; and any one of the intermediate end plates described above, wherein the intermediate end plate is located between two adjacent sub-modules.
[0015] When the above-mentioned preferred technical solution is adopted, by setting an intermediate end plate between two adjacent sub-modules, two short modules can be connected end to end to form a long module, thereby increasing the module length in the battery PACK. For the automotive PACK module, since there is no need to add aluminum plates on the sides for fixing and no need to use laser welding, the cost of the PACK module is greatly reduced and the battery processing procedure is simplified; for the energy storage PACK, two short modules can be directly stacked through the intermediate end plate to form a long module, which solves the problem in the prior art that the number of required module beams, fixing bolts, etc. increases due to the need to connect two or more short modules in series to form a long module, thereby resulting in higher costs.
[0016] Furthermore, by providing a hoisting structure on the side of the middle end plate, it is possible to prevent the middle part of the battery module from being deformed during hoisting, thereby reducing the risk of the middle part of the battery module sagging and falling off.
[0017] Furthermore, compared with setting the lifting structure in the form of a lifting ring, setting the lifting structure in the form of a lifting hole can, on the one hand, make the weight of the intermediate end plate lower, thereby helping to reduce the weight of the battery module, and on the other hand, can be more conducive to saving materials for the intermediate end plate and reducing the cost of the intermediate end plate.
[0018] Furthermore, by setting the number of lifting holes to multiple, on the one hand, the battery module can be lifted through multiple lifting holes to improve the lifting stability. On the other hand, setting the number of lifting holes to multiple can also help reduce the weight of the intermediate end plate, and at the same time help the processing and forming of the intermediate end plate, save processing materials, and reduce the cost of the intermediate end plate.
[0019] Furthermore, by providing an avoidance gap matched with the cable tie between two adjacent lifting structures, the lifting structure can avoid the cable tie setting, thereby avoiding the inability to lift due to the conflict between the cable tie and the lifting structure.
[0020] Furthermore, by arranging a weight-reducing structure on the first end face and the second end face, on the one hand, the weight of the intermediate end plate can be reduced, thereby reducing the weight of the battery module; on the other hand, the wall thickness of the intermediate end plate can be reduced, which is more conducive to saving processing materials of the intermediate end plate and facilitating the processing and forming of the intermediate end plate.
[0021] Furthermore, by arranging a weight reduction area and a connection area on the first end face and / or the second end face, and the weight reduction structure is arranged in the weight reduction area, it is possible to facilitate the connection of the sub-module with the first end face and / or the second end face through the connection area, thereby avoiding the setting of the weight reduction structure affecting the connection between the sub-module and the intermediate end plate. By arranging the projection of the first weight reduction groove on the second end face and the second weight reduction groove in a non-overlapping form, the weight reduction structure on the first end face and the weight reduction structure on the second end face can be staggered, thereby further reducing the wall thickness of the intermediate end plate, being more conducive to the processing and forming of the intermediate end plate, improving the processing efficiency of the intermediate end plate, and at the same time more effectively reducing the weight of the intermediate end plate, thereby more effectively reducing the weight of the battery module.
[0022] Furthermore, by setting the material of the intermediate end plate to a composite material, compared with setting the intermediate end plate to a metal material, on the one hand, the insulating properties of the composite material itself can be utilized to avoid setting an insulating sheet between the sub-module and the intermediate end plate, thereby reducing the assembly process of the battery module and improving the production efficiency of the battery module; on the other hand, the weight of the intermediate end plate can be greatly reduced, thereby greatly reducing the weight of the battery module.
[0023] In addition, the battery module further provided by the utility model on the basis of the above-mentioned technical solution includes the intermediate end plate for the battery module introduced above, and thus has the beneficial effects of the intermediate end plate for the battery module mentioned above. Compared with the battery module before the improvement, the battery module of the utility model has lower cost, fewer parts and fewer processing steps. At the same time, the battery module has lower weight and higher energy density. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:
[0025] Figure 1 This is a schematic diagram of the three-dimensional structure of the battery module of the utility model. Figure 1 ;
[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the battery module of the utility model. Figure 2 ;
[0027] Figure 3 It is a right view structural schematic diagram of the battery module of the utility model;
[0028] Figure 4 It is a schematic diagram of the top view of the battery module of the utility model;
[0029] Figure 5 It is a three-dimensional structural schematic diagram of the middle end plate of the utility model;
[0030] Figure 6 It is a structural schematic diagram of the first side wall of the middle end plate of the utility model;
[0031] Figure 7 It is a structural schematic diagram of a first end surface of the middle end plate of the utility model;
[0032] Figure 8 It is a structural schematic diagram of the second end surface of the middle end plate of the utility model.
[0033] List of reference numerals:
[0034] 1. Middle end plate; 11. First end face; 101. First weight reduction area; 102. Second weight reduction area; 103. Connection area; 111. First weight reduction groove; 112. First avoidance area; 12. Second end face; 121. Second weight reduction groove; 122. Second avoidance area; 131. First side wall; 132. Second side wall; 133. Lifting hole; 1341. First avoidance gap; 1342. Second avoidance gap; 21. First sub-module; 22. Second sub-module; 31. First cable tie; 32. Second cable tie; 41. First end plate; 42. Second end plate. DETAILED DESCRIPTION
[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.
[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer" and other terms indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0038] It should be noted that the intermediate end plate of the present invention is used to connect two adjacent sub-modules. It can be understood that the battery module may include only two sub-modules, and the intermediate end plate is located between the two sub-modules and connected to the two sub-modules. Alternatively, the battery module may also include N sub-modules (where N≥3), and the intermediate end plate is located between two adjacent sub-modules and connected to the two adjacent sub-modules, and so on. Such adjustments and changes to the number of sub-modules of the battery module do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.
[0039] The following takes a battery module including two sub-modules as an example to introduce in detail a specific embodiment of the intermediate end plate of the present utility model.
[0040] Specifically, see Figures 1 to 4 , Figure 1 This is a schematic diagram of the three-dimensional structure of the battery module of the utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of the battery module of the utility model. Figure 2 ; Figure 3 It is a right view structural schematic diagram of the battery module of the utility model; Figure 4 It is a schematic diagram of the top view of the battery module of the utility model.
[0041] like Figures 1 to 4As shown, the battery module includes a first submodule 21 and a second submodule 22, and the middle end plate 1 has a first end surface 11 and a second end surface 12 arranged opposite to each other (as shown in FIG. Figure 6 As shown), the middle end plate 1 is located between the first sub-module 21 and the second sub-module 22, and the first sub-module 21 and the second sub-module 22 are connected to the first end surface 11 and the second end surface 12 respectively.
[0042] By setting an intermediate end plate 1 between two adjacent sub-modules, two short modules can be connected end to end to form a long module, thereby increasing the module length in the battery PACK, and further facilitating the increase of the capacity of the battery PACK. For the automotive PACK module, since there is no need to add aluminum plates on the sides for fixing and no need to use laser welding, the cost of the PACK module is greatly reduced, the battery processing procedure is simplified, and production efficiency is improved. For the energy storage PACK, two short modules can be directly stacked to form a long module through the intermediate end plate 1, which solves the problem of higher cost in the prior art due to the need to connect two or more short modules in series to form a long module, resulting in an increase in the number of required module beams, fixing bolts, etc. At the same time, it reduces the space waste inside the module, helps to improve the energy density of the battery, and thus is conducive to achieving cost reduction and efficiency improvement.
[0043] Continue reading Figure 3 , and then see Figure 5 and Figure 6 , Figure 5 It is a three-dimensional structural schematic diagram of the middle end plate of the utility model; Figure 6 It is a structural schematic diagram of the first side wall of the middle end plate of the utility model.
[0044] like Figure 3 , Figure 5 and Figure 6 As shown, the middle end plate 1 also has a side surface located between the first end surface 11 and the second end surface 12, and a lifting structure is arranged on the side surface.
[0045] By providing a hoisting structure on the side of the middle end plate 1, it is possible to prevent the middle part of the battery module from being deformed during hoisting, thereby reducing the risk of the middle part of the battery module sagging and falling off.
[0046] Specifically, the side surface includes a first side wall 131 and a second side wall 132 that are oppositely disposed and a top wall and a bottom wall that are oppositely disposed, wherein the first side wall 131 and the second side wall 132 extend in a vertical direction, and the top wall and the bottom wall extend in a horizontal direction.
[0047] In a specific embodiment, Figure 5 and Figure 6 As shown, the hanging structure is disposed on the first side wall 131 and / or the second side wall 132 .
[0048] In another specific embodiment, the hanging structure is arranged on the top wall.
[0049] In another possible embodiment, the hanging structure is disposed on the first side wall 131 , the second side wall 132 and the top wall.
[0050] It should be noted that although the above three embodiments can realize the hoisting of the battery module, compared with the form of setting the hoisting structure on the top wall, setting the hoisting structure on the first side wall 131 and the second side wall 132 can further improve the hoisting stability.
[0051] Preferably, if Figure 3 , Figure 5 and Figure 6 As shown, the side surface includes a first side wall 131 and a second side wall 132 which are arranged opposite to each other and extend in the vertical direction, and the hanging structure is arranged on the first side wall 131 and the second side wall 132 .
[0052] It should be noted that the hoisting structure is not limited to being arranged on the first side wall 131 and the second side wall 132. For example, the hoisting structure can also be arranged only on the first side wall 131, or the hoisting structure can also be arranged only on the second side wall 132, etc. Such adjustment and change of the specific arrangement position of the hoisting structure on the first side wall 131 and the second side wall 132 does not deviate from the principle and scope of the utility model, and should be included in the protection scope of the utility model. Of course, preferably, the hoisting structure is arranged on the first side wall 131 and the second side wall 132.
[0053] It should also be noted that, in actual application, the present invention does not impose any restrictions on the specific structural form of the lifting structure, as long as the battery module can be lifted by the lifting structure. For example, the lifting structure can be set as a lifting hole 133, or the lifting structure can be set as a lifting groove, or the lifting structure can be set as a lifting member such as a lifting rod or a lifting ring, etc. Such adjustments and changes to the specific structural form of the lifting structure do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.
[0054] Preferably, if Figure 3 , Figure 5 and Figure 6 As shown, the lifting structure is a lifting hole 133.
[0055] Compared with setting the lifting structure in the form of a lifting member, setting the lifting structure in the form of a lifting hole 133 does not require the addition of additional components and can reduce the weight of the middle end plate 1, thereby helping to reduce the weight of the battery module.
[0056] It should be noted that, in actual applications, those skilled in the art may set the number of lifting holes 133 to one, or may set the number of lifting holes 133 to two, or may set the number of lifting holes 133 to multiple, and so on. Such adjustments and changes to the specific setting number of lifting holes 133 do not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model.
[0057] Preferably, if Figure 3 , Figure 5 and Figure 6 As shown, there are multiple hanging holes 133 , and the multiple hanging holes 133 are spaced apart and distributed along the vertical direction on the first side wall 131 and the second side wall 132 .
[0058] By setting the number of lifting holes 133 to be multiple, on the one hand, the battery module can be lifted through the multiple lifting holes 133 to improve the lifting stability. On the other hand, setting the number of lifting holes 133 to be multiple can also help reduce the weight of the intermediate end plate 1, and at the same time help the processing and forming of the intermediate end plate 1, save processing materials, and reduce the cost of the intermediate end plate 1.
[0059] Preferably, if Figures 1 to 3 , Figure 5 and Figure 6 As shown, the battery module of the present invention further includes a cable tie, and at least two adjacent hanging holes 133 have an escape gap adapted to the cable tie. When assembled, a portion of the cable tie is located in the escape gap.
[0060] By providing an avoidance gap adapted to the cable tie between two adjacent hoisting holes 133 , the hoisting holes 133 can be arranged away from the cable tie, thereby preventing the cable tie from covering the hoisting holes 133 and causing the hoisting to fail.
[0061] It should be noted that the avoidance gap is set corresponding to the cable tie. For example, the number of cable ties is one, and accordingly, the number of avoidance gaps is also one. Alternatively, the number of cable ties can be set to two, and accordingly, the number of avoidance gaps is also two and the two avoidance gaps are set one-to-one with the cable ties, and so on. Such adjustments and changes to the specific setting number of avoidance gaps do not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model.
[0062] Preferably, if Figures 1 to 3 , Figure 5 and Figure 6As shown, the battery module includes a first tie 31 and a second tie 32, and the first tie 31 and the second tie 32 are spaced apart in the vertical direction. A first avoidance gap 1341 adapted to the first tie 31 and a second avoidance gap 1342 adapted to the second tie 32 are formed on the middle end plate 1. When assembled, a portion of the first tie 31 is located in the first avoidance gap 1341, and a portion of the second tie 32 is located in the second avoidance gap 1342.
[0063] Continue reading Figure 5 , and then see Figure 7 and Figure 8 , Figure 7 It is a structural schematic diagram of the first end surface of the middle end plate of the utility model; Figure 8 It is a structural schematic diagram of the second end surface of the middle end plate of the utility model.
[0064] Preferably, if Figure 5 , Figure 7 and Figure 8 As shown, a weight-reducing structure is also provided on the first end surface 11 and the second end surface 12 of the middle end plate 1 .
[0065] By arranging a weight-reducing structure on the first end face 11 and the second end face 12, on the one hand, the weight of the intermediate end plate 1 can be reduced, thereby reducing the weight of the battery module; on the other hand, the wall thickness of the intermediate end plate 1 can also be reduced, which is more conducive to the processing and forming of the intermediate end plate 1, saving the material of the intermediate end plate 1, thereby reducing the cost of the intermediate end plate 1.
[0066] It should be noted that the weight-reducing structure is not limited to being simultaneously disposed on the first end face 11 and the second end face 12. For example, the weight-reducing structure may be disposed only on the first end face 11, or, the weight-reducing structure may be disposed only on the second end face 12, and so on. Such adjustments and changes to the specific setting position of the weight-reducing structure do not deviate from the principle and scope of the present utility model and should be included in the protection scope of the present utility model.
[0067] Of course, preferably, the weight-reducing structure is arranged on the first end surface 11 and the second end surface 12 .
[0068] The following describes a specific embodiment of the present utility model in detail by taking the weight reduction structure on the first end surface 11 as an example.
[0069] like Figure 7 As shown, a weight reduction area and a connection area 103 are provided on the first end surface 11 , the weight reduction structure is provided in the weight reduction area, and the sub-module is connected to the first end surface 11 via the connection area 103 .
[0070] With such an arrangement, it is possible to facilitate the connection of the sub-module with the first end surface 11 through the connection area 103 , thereby preventing the arrangement of the weight-reducing structure from affecting the connection between the sub-module and the middle end plate 1 .
[0071] It should be noted that, in actual applications, the weight reduction area and the connection area 103 can be arranged to extend in the vertical direction, or, the weight reduction area and the connection area 103 can be arranged to extend in the horizontal direction, or, the weight reduction area and the connection area 103 can be arranged in any other possible form, etc. Such adjustments and changes to the specific distribution methods of the weight reduction area and the connection area 103 do not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model.
[0072] Preferably, the weight reduction area and the connection area 103 are arranged to extend in the vertical direction.
[0073] It should be noted that, in actual applications, technical personnel in this field may set only one weight reduction zone, or may set two weight reduction zones, with the connection zones located on both sides of the weight reduction zones, or may set multiple weight reduction zones, with the weight reduction zones and the connection zones spaced apart in the horizontal direction, etc. Such adjustments and changes to the specific settings of the weight reduction zones and the connection zones 103 do not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model.
[0074] Preferably, if Figure 7 As shown, a first weight reduction area 101 and a second weight reduction area 102 are provided on the first end face 11, and connection areas 103 extending in the vertical direction are respectively provided on both sides of the first weight reduction area 101 and the second weight reduction area 102, and the weight reduction structure is arranged in the first weight reduction area 101 and the second weight reduction area 102, and the sub-module is connected to the first end face 11 through the connection area 103.
[0075] It should be noted that the present invention does not impose any limitation on the specific connection method between the submodule and the first end face 11, as long as the submodule and the first end face 11 can be connected. For example, a rubber cotton or a tape can be arranged in the connection area 103, and the submodule is bonded and connected to the first end face 11 through the rubber cotton, or glue can be applied in the connection area 103, and the submodule is bonded and connected to the first end face 11 through the glue, or the connection between the submodule and the first end face 11 can be achieved through any other possible method, etc. Such adjustment and change of the specific connection method between the submodule and the first end face 11 does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.
[0076] Preferably, a collodion (not shown in the figure) is provided in the connection area 103 , and the sub-module is bonded and connected to the first end surface 11 via the collodion.
[0077] It should be noted that although the present invention is introduced by taking the weight-reducing structure on the first end face 11 as an example, this is not restrictive. The distribution method of the weight-reducing structure on the first end face 11 is also applicable to the second end face 12. Such flexible adjustment and change does not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.
[0078] It should also be noted that, in actual applications, technical personnel in this field may set the weight-reducing structure to a weight-reducing groove, or, may set the weight-reducing structure to a weight-reducing hole, or, may set the weight-reducing structure to a structure of a weight-reducing groove and a weight-reducing hole, etc. Such adjustments and changes to the specific structural form of the weight-reducing structure do not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model.
[0079] Preferably, if Figure 5 , Figure 7 and Figure 8 As shown, the weight-reducing structure is a weight-reducing groove.
[0080] Specifically, Figure 7 and Figure 8 As shown, the weight-reducing structure includes a first weight-reducing groove 111 arranged on the first end surface 11 and a second weight-reducing groove 121 arranged on the second end surface 12 , and the projection of the first weight-reducing groove 111 on the second end surface 12 does not overlap with the second weight-reducing groove 121 .
[0081] Through such an arrangement, the weight-reducing structure on the first end face 11 and the weight-reducing structure on the second end face 12 can be staggered, thereby further reducing the wall thickness of the intermediate end plate 1, being more conducive to the processing and forming of the intermediate end plate 1, improving the processing efficiency of the intermediate end plate 1, and at the same time being able to more effectively reduce the weight of the intermediate end plate 1, thereby more effectively reducing the weight of the battery module.
[0082] It should be noted that, in actual applications, the present invention does not impose any limitation on the shape of the weight-reducing groove. For example, the weight-reducing groove can be set as a square groove, or as a circular groove, or as a strip groove or a special-shaped groove, etc. Such adjustments and changes to the specific setting shape of the weight-reducing groove do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.
[0083] Preferably, if Figure 5 , Figure 7 and Figure 8 As shown, the weight-reducing slot is a square slot.
[0084] Preferably, if Figure 7 and Figure 8As shown, a first avoidance zone 112 adapted to the second weight reducing groove 121 is formed between two adjacent first weight reducing grooves 111, a second avoidance zone 122 adapted to the first weight reducing groove 111 is arranged between two adjacent second weight reducing grooves 121, the projection of the first weight reducing groove 111 on the second end face 12 is located in the second avoidance zone 122, and the projection of the second weight reducing groove 121 on the first end face 11 is located in the first avoidance zone 112.
[0085] Through such an arrangement, the weight-reducing grooves can be distributed as much as possible on the first end face 11 and the second end face 12, and the weight of the middle end plate 1 can be reduced as much as possible while ensuring that the wall thickness of the middle end plate 1 is reduced, thereby effectively reducing the weight of the battery module.
[0086] It should be noted that it is not limited to that the projection of the first weight-reducing groove 111 on the second end face 12 is located in the second avoidance zone 122, and the projection of the second weight-reducing groove 121 on the first end face 11 is located in the first avoidance zone 112. For example, the weight-reducing grooves can be arranged to be randomly distributed on the first end face 11 and the second end face 12, and so on. Such adjustment and change of the specific distribution mode of the weight-reducing grooves on the first end face 11 and the second end face 12 does not deviate from the principle and scope of the present utility model, and should be included in the protection scope of the present utility model. Of course, preferably, the projection of the first weight-reducing groove 111 on the second end face 12 is located in the second avoidance zone 122, and the projection of the second weight-reducing groove 121 on the first end face 11 is located in the first avoidance zone 112.
[0087] It should also be noted that, in practical applications, the present invention does not impose any restrictions on the specific material of the intermediate end plate 1. For example, the material of the intermediate end plate 1 can be set to a metal material, or the material of the intermediate end plate 1 can be set to a composite material, or the intermediate end plate 1 can be set to any other possible material, etc. Such adjustments and changes to the specific material of the intermediate end plate 1 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.
[0088] Preferably, the middle end plate 1 is made of composite material.
[0089] By setting the material of the intermediate end plate 1 to a composite material, compared with setting the intermediate end plate 1 to a metal material, on the one hand, the insulating properties of the composite material itself can be utilized to avoid setting an insulating sheet between the sub-module and the intermediate end plate 1, thereby reducing the assembly process of the battery module and improving the production efficiency of the battery module; on the other hand, the weight of the intermediate end plate 1 can be greatly reduced, thereby greatly reducing the weight of the battery module.
[0090] Further preferably, the middle end plate 1 is made of glass fiber reinforced composite material.
[0091] Through such a configuration, compared with configuring the intermediate end plate 1 to be other types of composite materials, configuring the intermediate end plate 1 to be a glass fiber reinforced composite material can greatly improve the structural strength of the intermediate end plate 1, thereby improving the structural stability of the battery module.
[0092] It should be noted that the intermediate end plate 1 is not limited to being made of glass fiber reinforced composite material. For example, the intermediate end plate 1 can also be made of other types of composite materials such as PP, PE, etc. Such adjustment and change of the specific material type of the intermediate end plate 1 does not deviate from the principle and scope of the present utility model and should be included in the protection scope of the present utility model. Of course, preferably, the material of the intermediate end plate 1 is glass fiber reinforced composite material.
[0093] It should be noted that although the present invention is introduced by taking a battery module including two sub-modules as an example, this is not restrictive. The intermediate end plate 1 of the present invention is also applicable to a battery module including N sub-modules (where N ≥ 3). Such flexible adjustment and change does not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.
[0094] In addition, the utility model further provides a battery module, which includes at least two sub-modules and any one of the intermediate end plates 1 described above, wherein the intermediate end plate 1 is located between two adjacent sub-modules.
[0095] Specifically, Figures 1 to 4 As shown, the battery module includes a first sub-module 21 and a second sub-module 22, and the battery assembly also includes a first end plate 41, an intermediate end plate 1 and a second end plate 42 which are spaced apart in sequence along the horizontal direction, wherein the first sub-module 21 is located between the first end plate 41 and the intermediate end plate 1, and the second sub-module 22 is located between the second end plate 42 and the intermediate end plate 1.
[0096] The first sub-module 21 includes a plurality of battery cell units stacked and connected in sequence, wherein the battery cell unit at one end close to the first end plate 41 is adhesively connected to the first end plate 41 , and the battery cell unit at one end close to the middle end plate 1 is adhesively connected to the first end surface 11 of the middle end plate 1 .
[0097] The second sub-module 22 includes a plurality of battery cell units stacked and connected in sequence, wherein the battery cell unit at one end close to the second end plate 42 is connected to the second end plate 42 , and the battery cell unit at one end close to the middle end plate 1 is connected to the second end surface 12 of the middle end plate 1 .
[0098] When stacking the battery modules, first fix the first end plate 41 by the tooling, then fix the battery cell unit on the first end plate 41 by glue or tape, then sequentially bond the adjacent battery cell units by glue or tape, and then bond the battery cell unit close to the middle end plate 1 to the first end surface 11 of the middle end plate 1 by glue or tape, thus completing the stacking of the first sub-module 21;
[0099] The battery cell unit is then fixed to the second end face 12 of the middle end plate 1 by glue or tape, and then the adjacent battery cell units are bonded in turn by glue or tape, and finally the battery cell unit close to the second end plate 42 is bonded to the second end plate 42 by glue or tape to complete the stacking of the second sub-module 22.
[0100] like Figures 1 to 4 As shown, the first end plate 41, the first sub-module 21, the middle end plate 1, the second sub-module 22, and the second end plate 42 are stacked in sequence to form a stacked module.
[0101] like Figures 1 to 3 As shown, the battery module also includes a first tie 31 and a second tie 32. The first side wall 131 and the second side wall 132 of the middle end plate 1 are respectively provided with a first avoidance gap 1341 adapted to the first tie 31 and a second avoidance gap 1342 adapted to the second tie 32. The first tie 31 and the second tie 32 are sleeved on the outside of the stacked module. When assembled, the first tie 31 is located in the first avoidance gap 1341, and the second tie 32 is located in the second avoidance gap 1342, thereby completing the stacking assembly of the battery module.
[0102] By setting the middle end plate 1, during the stacking and transportation of the battery modules, the battery modules can be hoisted by the hoisting structure on the side of the middle end plate 1 to prevent the middle part of the battery module from sagging and falling off, thereby improving the production efficiency of the battery modules.
[0103] Compared with the automotive PACK module in the prior art, there is no need to add side aluminum plates for fixing and no need for laser welding, which reduces the production cost of the PACK module; compared with the prior art of connecting multiple short modules in series to form an energy storage PACK module, the production cost of the battery module is reduced due to the reduction of the mounting beams and mounting bolts required for installation, the installation process is reduced, and at the same time, the internal space of the battery module is saved and the energy density of the battery module is improved.
[0104] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims
1. An intermediate end plate for a battery module, the battery module comprising at least two sub-modules, characterized in that: The middle end plate is used to connect two adjacent sub-modules. The intermediate end plate has a first end face and a second end face that are arranged opposite to each other. The intermediate end plate is located between two adjacent sub-modules, and the two adjacent sub-modules are respectively connected to the first end face and the second end face.
2. The intermediate end plate for a battery module according to claim 1, characterized in that: The middle end plate also has a side surface located between the first end surface and the second end surface, and a hanging structure is arranged on the side surface.
3. The intermediate end plate for a battery module according to claim 2, characterized in that: The side surface comprises a first side wall and a second side wall which are arranged opposite to each other and extend in a vertical direction, and the hanging structure is arranged on the first side wall and / or the second side wall; And / or, the lifting structure is a lifting hole.
4. The intermediate end plate for a battery module according to claim 3, characterized in that: There are multiple hoisting holes, and the multiple hoisting holes are spaced apart along the vertical direction on the first side wall and / or the second side wall.
5. The intermediate end plate for a battery module according to claim 3, characterized in that: The battery module further comprises a cable tie, and an avoidance gap adapted to the cable tie is arranged between at least two adjacent lifting structures. When assembled, a part of the cable tie is located in the avoidance gap.
6. The intermediate end plate for a battery module according to claim 1, characterized in that: A weight reduction structure is also provided on the first end surface and / or the second end surface.
7. The intermediate end plate for a battery module according to claim 6, characterized in that: A weight reduction area and a connection area are provided on the first end surface and / or the second end surface, the weight reduction structure is provided in the weight reduction area, and the sub-module is connected to the first end surface and / or the second end surface via the connection area; And / or, the weight-reducing structure includes a first weight-reducing groove arranged on the first end surface and a second weight-reducing groove arranged on the second end surface, and a projection of the first weight-reducing groove on the second end surface does not overlap with the second weight-reducing groove.
8. The intermediate end plate for a battery module according to any one of claims 1 to 7, characterized in that: The material of the middle end plate is a composite material.
9. The intermediate end plate for a battery module according to claim 8, characterized in that: The material of the middle end plate is glass fiber reinforced composite material.
10. A battery module, characterized in that: The battery module comprises: At least two sub-modules; and The intermediate end plate according to any one of claims 1 to 9, wherein the intermediate end plate is located between two adjacent sub-modules.