End plate assembly, battery module and battery

Abstract

The utility model provides an end plate assembly, a battery module and a battery, and relates to the technical field of batteries. The end plate assembly comprises an output pole base and an end plate, the output pole base comprises a body and a connecting piece, and the connecting piece comprises a cap part and a rod part with the radial sizes sequentially increased; a special-shaped through hole is formed in the end plate and comprises a releasing part with the radial size larger than that of the cap part and a locking part with the radial size smaller than that of the cap part, and the radial size of the locking part is not smaller than that of the rod part. The locking part is matched with the rod part, and the cap part is matched with the end plate in a stopping mode. The special-shaped through hole is formed in the end plate, the locking part can be matched with the rod part, so that the cap part is matched with the end plate in a stopping manner, and the position stability of the output pole base is improved; and when the output pole base is maintained, the rod part is moved into the release part by pushing the output pole base, so that the connecting piece is conveniently withdrawn from the release part, and the output pole base is disassembled. Therefore, the maintenance convenience of the output pole base can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular to an end plate assembly, a battery module, and a battery. Background Art

[0002] A battery module includes two end plates, a plurality of square shell battery cells stacked in sequence between the two end plates, and a tie strap for binding the end plates and the battery cells together. After the plurality of battery cells are connected in series or in parallel, current is transmitted through an output pole. To prevent the output pole from shaking, the output pole needs to be fixed to the end plate. Specifically, an output pole base is provided on the end plate. One end of the output pole base is used to fix the output pole, and the other end is inserted into the end plate. Along the insertion direction, the output pole base includes a body, a fixing post, and a fixing head connected in sequence. A connection hole is provided on the end plate. Along the radial direction of the connection hole, the size of the fixing head is larger than the size of the connection hole, and the size of the fixing post is the same as the size of the connection hole. A through groove is provided along the radial direction at one end of the fixing head away from the output pole base. When the fixing head is inserted into the connection hole, the hole wall of the connection hole squeezes the fixing head, so that the parts of the fixing head on both sides of the through groove approach each other, so that the size of the deformed fixing head is not larger than the size of the connection hole, so as to facilitate the fixing head to pass through the connection hole. After the fixing head passes through the connection hole, it returns to its original state and is in a blocking fit with the end plate to prevent the fixing head from withdrawing from the connection hole.

[0003] After the output pole base with the above structure is installed, when repairing or reinstalling the output pole base, due to the blocking fit between the fixing head and the output pole base, the fixing head needs to be squeezed towards the through groove so that its radial dimension is not larger than the radial dimension of the connection hole to release the blocking fit between the fixing head and the end plate, so that the fixing head can withdraw from the connection hole. And after the tie strap is installed on the battery module, the fixing head is blocked by the tie strap. Therefore, when disassembling the output pole base, the tie strap needs to be disassembled first, and then the fixing head is squeezed. Thus, the disassembly difficulty of the output pole base is relatively large, and the maintenance convenience is poor. Moreover, the through groove provided on the fixing head reduces the strength of the fixing head, which will result in relatively poor connection reliability between the output pole base and the end plate. Summary of the Utility Model

[0004] Embodiments of the present application provide an end plate assembly, a battery module, and a battery, which can improve the maintenance convenience of the output pole base.

[0005] In a first aspect, an embodiment of the present application provides an end plate assembly, which includes an output pole base and an end plate. The output pole base includes a body and a connecting member. The connecting member includes a cap portion and a rod portion. Two ends of the rod portion are respectively connected to the body and the cap portion. The radial dimension of the cap portion is greater than that of the rod portion. An irregular through hole is provided on the end plate. The irregular through hole includes a release portion and a locking portion that are connected in the radial direction. The radial dimension of the release portion is greater than that of the cap portion. The radial dimension of the locking portion is not less than that of the rod portion and less than that of the cap portion. Wherein, the release portion is configured to allow the cap portion to pass through the irregular through hole, and the locking portion cooperates with the rod portion so that the cap portion and the end plate are in a blocking fit.

[0006] In one embodiment, a protrusion is provided at the connection between the hole wall of the release portion and the hole wall of the locking portion. The protrusion is configured to elastically deform under pressure so that the rod portion can move between the release portion and the locking portion.

[0007] In one embodiment, the protrusion is provided on the side of the hole wall of the irregular through hole away from the output pole base, and the side of the protrusion away from the output pole base is disposed opposite to the end of the cap portion.

[0008] In one embodiment, along the axial direction of the irregular through hole, the outer surface of the protrusion near the output pole base smoothly transitions to the hole wall of the irregular through hole.

[0009] In one embodiment, the side where the outer wall of the protrusion is connected to the hole wall of the release portion is tangent to the hole wall of the release portion.

[0010] In one embodiment, a fillet is provided at the connection between the outer wall of the protrusion and the hole wall of the locking portion.

[0011] In one embodiment, the release portion is a tapered hole, and the large-diameter end of the tapered hole faces the output pole base.

[0012] In one embodiment, the output pole base includes two connecting members. Two irregular through holes are provided at the portion of the end plate for mounting the output pole base. The two connecting members are respectively matched with the two irregular through holes.

[0013] In one embodiment, the two irregular through holes are symmetrically arranged.

[0014] In one embodiment, the outer peripheral surface of the cap portion away from the rod portion is a tapered surface, and the small-diameter end of the tapered surface faces away from the rod portion.

[0015] In one embodiment, the end plate is further provided with a limiting groove. The limiting groove is provided on the plate surface of the end plate and is located at one end of the irregular through hole away from the output pole base. One end of the irregular through hole away from the output pole base is communicated with the limiting groove. Wherein, the release portion is configured to allow the cap portion to be located in the limiting groove after passing through the irregular through hole, and when the locking portion cooperates with the rod portion, the cap portion and the groove wall of the limiting groove are in a blocking fit.

[0016] In a second aspect, an embodiment of the present application provides a battery module, which includes a square-shell battery cell, a connection row, an output pole, a tie strap, and the aforementioned end plate assembly; there are two end plate assemblies, and the two end plates are arranged at intervals; a plurality of square-shell battery cells are stacked in sequence between the two end plate assemblies; the tie strap binds the end plate assembly and the plurality of square-shell battery cells into one body; the connection row connects the plurality of square-shell battery cells in series or in parallel; one end of the output pole is connected to the electrode of the battery cell adjacent to the end plate assembly; wherein, the output pole is fixed on the side of the body away from the connecting member.

[0017] In a third aspect, an embodiment of the present application provides a battery, which includes the aforementioned battery module.

[0018] Beneficial effects of the embodiments of the present application:

[0019] In the embodiments of the present application, by providing a special-shaped through hole on the end plate to cooperate with the connecting member of the output pole base, the locking portion and the rod portion can be used in cooperation to make the cap portion cooperate with the end plate to prevent the cap portion from disengaging from the special-shaped through hole, thereby improving the position stability of the output pole base; and when maintaining the output pole base, the rod portion can be moved into the release portion by pushing the output pole base, so as to facilitate the withdrawal of the connecting member from the release portion and disassemble the output pole base. In this way, the disassembly difficulty of the output pole base can be reduced, and the maintenance convenience of the output pole base can be improved. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the end plate assembly provided by the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the output pole base provided by the embodiment of the present application;

[0023] Figure 3 It is a schematic structural diagram of the end plate provided by the embodiment of the present application;

[0024] Figure 4 It is a cross-sectional view of the cooperation between the output pole base and the end plate provided by the embodiment of the present application;

[0025] Figure 5 It is Figure 4 The enlarged view of part A in

[0026] Figure 6It is a schematic structural diagram of a special-shaped through hole provided by an embodiment of the present application;

[0027] Figure 7 It is a schematic layout diagram of a special-shaped through hole provided by an embodiment of the present application;

[0028] Figure 8 It is a schematic structural diagram of a battery module provided by an embodiment of the present application.

[0029] Explanation of reference numerals:

[0030] 001 - End plate assembly;

[0031] 011 - End plate; 111 - Limit groove; 112 - Special-shaped through hole; 1121 - Release portion; 1122 - Locking portion; 113 - Protrusion; 114 - Chamfer;

[0032] 012 - Output pole base; 121 - Body; 122 - Connecting piece; 1221 - Cap portion; 1222 - Rod portion; 1223 - Tapered surface;

[0033] 002 - Battery module; 021 - Square shell battery cell; 022 - Connecting row; 023 - Output pole; 024 - Cable tie. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0035] In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0036] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

[0037] In the description of the embodiments of the present application, words such as "example" or "for example" are used to represent examples, explanations or descriptions. Any embodiment or design described as "for example" or "example" in the embodiments of the present application is not construed as being more preferred or having more advantages than another embodiment or design. The use of words such as "example" or "for example" is intended to present relative concepts in a clear manner.

[0038] For ease of understanding the solution of the present application, the spline curves and arrows used for the reference numerals in the drawings are described herein: For the components indicated by the spline curves without arrows, they are solid components, that is, components having a solid structure; for the components indicated by the spline curves with arrows, they are virtual components, that is, components without a solid structure.

[0039] Please refer to Figures 1 to 3 , Figure 1 which is a schematic structural diagram of the end plate assembly 001 provided by the embodiments of the present application, Figure 2 which is a schematic structural diagram of the output pole base 012 provided by the embodiments of the present application, Figure 3 which is a schematic structural diagram of the end plate 011 provided by the embodiments of the present application. The embodiments of the present application provide an end plate assembly 001. The end plate assembly 001 includes an output pole base 012 and an end plate 011. The output pole base 012 includes a body 121 and a connecting member 122. The connecting member 122 includes a cap portion 1221 and a rod portion 1222. The two ends of the rod portion 1222 are respectively connected to the body 121 and the cap portion 1221. The radial dimension of the cap portion 1221 is greater than the radial dimension of the rod portion 1222, as Figure 2 shown. An irregular through hole 112 is provided on the end plate 011, as Figure 3 shown. The irregular through hole 112 includes a release portion 1121 and a locking portion 1122 that are connected in the radial direction. The radial dimension of the release portion 1121 is greater than the radial dimension of the cap portion 1221. The radial dimension of the locking portion 1122 is not less than the radial dimension of the rod portion 1222, and the radial dimension of the locking portion 1122 is less than the radial dimension of the cap portion 1221. The release portion 1121 is configured to allow the cap portion 1221 to pass through the irregular through hole 112 and the locking portion to cooperate with the rod portion 1222, so that the cap portion 1221 is in a blocking fit with the end plate 011.

[0040] It can be understood that the distance D between two parts of the hole wall of the locking part 1122 that are connected to the hole wall of the releasing part 1121 is smaller than the shaft diameter φ of the rod part 1222, as Figure 4 and Figure 5 shown, Figure 4 is a cross-sectional view of the cooperation between the output pole base 012 and the end plate 011 provided by the embodiment of the present application, Figure 5 is Figure 4 the enlarged view of part A in Figure 4 is a cross-sectional view taken through the maximum diameter of the releasing part 1121.

[0041] Specifically, the connecting piece 122 is a two-stage stepped shaft. Correspondingly, the cap part 1221 is a large-diameter shaft, and the rod part 1222 is a small-diameter shaft.

[0042] Specifically, the special-shaped through hole 112 is a gourd hole. Correspondingly, the releasing part 1121 is a large hole, and the locking part 1122 is a small hole.

[0043] In addition, when installing the output pole base 012 onto the end plate 011, first pass the cap part 1221 through the releasing part 1121 so that the rod part 1222 is located in the special-shaped through hole 112; then move the output pole base 012 towards the locking part 1122. When the rod part 1222 is located in the locking part 1122, the cap part 1221 is in a blocking fit with the end plate 011. In this way, the output pole base 012 is limited in the radial direction of the rod part 1222, thereby ensuring the position stability of the output pole base 012.

[0044] When disassembling the output pole base 012 from the end plate 011, push the output pole base 012 from the locking part 1122 towards the releasing part 1121, so as to facilitate the movement of the rod part 1222 into the releasing part 1121. Then lift the output pole base 012 in the axial direction of the special-shaped through hole 112 away from the end plate 011, so that the cap part 1221 is located outside the end plate 011 after passing through the releasing part 1121, thereby disassembling the output pole base 012, which is convenient for reinstalling the output pole base 012 or replacing the output pole base 012.

[0045] In this embodiment, by providing a shaped through-hole 112 on the end plate 011 to cooperate with the connecting member 122 of the output pole base 012, the locking portion 1122 can cooperate with the rod portion 1222 to make the cap portion 1221 engage with the end plate 011 in a blocking manner, preventing the cap portion 1221 from disengaging from the shaped through-hole 112, so as to improve the position stability of the output pole base 012; also, when maintaining the output pole base 012, by pushing the output pole base 012, the rod portion 1222 can be moved into the release portion 1121, thereby facilitating the withdrawal of the connecting member 122 from the release portion 1121 to disassemble the output pole base 012. In this way, the disassembly difficulty of the output pole base 012 can be reduced, and the maintenance convenience of the output pole base 012 can be improved.

[0046] Please refer to Figures 3 to 5 , in an embodiment, a protrusion 113 is provided at the connection between the hole wall of the release portion 1121 and the hole wall of the locking portion 1122. The protrusion 113 is configured to be elastically deformed under pressure so that the rod portion 1222 can move between the release portion 1121 and the locking portion 1122.

[0047] It can be understood that the distance D between the hole wall of the shaped through-hole 112 opposite to the protrusion 113 and the protrusion 113 is smaller than the shaft diameter φ of the rod portion 1222, as Figure 4 and Figure 5 shown.

[0048] In addition, when installing the output pole base 012 onto the end plate 011, first pass the cap portion 1221 through the release portion 1121 so that the rod portion 1222 is located in the shaped through-hole 112; then move the output pole base 012 towards the locking portion 1122, and when the connecting member 122 moves into contact with the protrusion 113, push the connecting member 122 forcefully to cause the protrusion 113 to be elastically deformed under pressure, thereby facilitating the rod portion 1222 to squeeze through the protrusion 113 and be located in the locking portion 1122. When the rod portion 1222 is located in the locking portion 1122, the protrusion 113 returns to its original state and engages with the rod portion 1222 in a blocking manner from the locking portion 1122 towards the release portion 1121 to prevent the rod portion 1222 from disengaging from the locking portion 1122. And at this time, the cap portion 1221 engages with the end plate 011 in a blocking manner. In this way, the output pole base 012 is limited in both the circumferential direction and the radial direction of the rod portion 1222, thereby ensuring the position stability of the output pole base 012.

[0049] When the output pole base 012 is detached from the end plate 011, the self-locking portion 1122 pushes the output pole base 012 towards the release portion 1121. When the connecting member 122 moves to contact the protrusion 113, the connecting member 122 is pushed forcefully so that the protrusion 113 is compressed to produce elastic deformation, facilitating the rod portion 1222 to squeeze through the protrusion 113 and be located in the release portion 1121. Then, the output pole base 012 is lifted in the axial direction of the special-shaped through hole 112 away from the end plate 011, so that the cap portion 1221 passes through the release portion 1121 and is located outside the end plate 011, thus detaching the output pole base 012 to facilitate reinstalling or replacing the output pole base 012.

[0050] In this embodiment, by providing a protrusion 113 at the connection between the release portion 1121 and the locking portion 1122 of the special-shaped through hole 112, the connecting member 122 located within the locking portion 1122 can be limited by the protrusion 113 to enhance the position stability of the output pole base 012; and when maintaining the output pole base 012, by pushing the output pole base 012 to overcome the limitation of the protrusion 113 and be located in the release portion 1121, it is convenient to withdraw the connecting member 122 from the release portion 1121 to detach the output pole base 012. In this way, the disassembly difficulty of the output pole base 012 can be reduced, and the maintenance convenience of the output pole base 012 can be improved.

[0051] In addition, by providing a protrusion 113 at the connection between the release portion 1121 and the locking portion 1122 of the special-shaped through hole 112, it is not necessary to provide a through slot on the connecting member 122, thus ensuring the structural integrity of the connecting member 122 and further ensuring the strength of the connecting member 122. In this way, the connection reliability between the output pole base 012 and the end plate 011 can be improved.

[0052] Please refer to Figure 5 , in an embodiment, the protrusion 113 is provided on the side of the hole wall of the special-shaped through hole 112 away from the output pole base 012, and the side of the protrusion 113 away from the output pole base 012 is disposed opposite to the end of the cap portion 1221.

[0053] It can be understood that when the rod portion 1222 is located in the locking portion 1122, the side of the protrusion 113 away from the output pole base 012 is disposed opposite to the end of the cap portion 1221, so that the cap portion 1221 is also in a blocking fit with the protrusion 113 along the axial direction.

[0054] In this embodiment, through the above settings, on the one hand, the area of the stop fit between the end plate 011 and the output pole base 012 can be increased, thereby increasing the position stability of the output pole base 012; on the other hand, the volume of the protrusion 113 can be reduced, so that the deformation force applied to the protrusion 113 during the installation and disassembly of the output pole base 012 is small, thereby improving the ease of installation and disassembly of the output pole base 012.

[0055] Please refer to Figure 5 , in an embodiment, along the axial direction of the special-shaped through hole 112, the outer surface of the protrusion 113 close to the output pole base 012 is smoothly transitioned to the hole wall of the special-shaped through hole 112.

[0056] In this embodiment, by smoothly transitioning the outer surface of the protrusion 113 to the hole wall of the special-shaped through hole 112, the stress concentration between the hole wall of the special-shaped through hole 112 and the protrusion 113 can be reduced, thereby reducing the risk of material fatigue and crack formation. Thus, the reliability of the end plate assembly 001 can be improved.

[0057] Please refer to Figure 6 , Figure 6 is a schematic structural diagram of the special-shaped through hole 112 provided by the embodiment of the present application. In an embodiment, the side where the outer wall of the protrusion 113 is connected to the hole wall of the release portion 1121 is tangent to the hole wall of the release portion 1121. In this way, when the connecting member 122 enters the locking portion 1122 from the release portion 1121, it is smoother and the external force to be overcome is small, thereby improving the ease of installation of the output pole base 012.

[0058] Please refer to Figure 6 , in an embodiment, a fillet 114 is provided at the connection portion between the outer wall of the protrusion 113 and the hole wall of the locking portion 1122. In this way, when the connecting member 122 enters the release portion 1121 from the locking portion 1122, the external force to be overcome is large, thereby improving the position stability of the output pole base 012 and preventing the connecting member 122 from randomly disengaging from the locking portion 1122.

[0059] Please refer to Figure 5 , in an embodiment, the release portion 1121 is a tapered hole, and the large-diameter end of the tapered hole faces the output pole base 012. In this way, the large-diameter end of the tapered hole can guide the cap portion 1221, thereby improving the smoothness of the cooperation between the release portion 1121 and the connecting member 122. Thus, the ease of installing the output pole base 012 onto the end plate 011 can be improved.

[0060] Please refer to Figure 2 and Figure 3, in one embodiment, the output pole base 012 includes two connecting members 122. Two special-shaped through holes 112 are provided at the portion of the end plate 011 for mounting the output pole base 012. The two connecting members 122 are respectively engaged with the two special-shaped through holes 112.

[0061] Specifically, two portions for mounting the output pole base 012 are provided on each end plate 011.

[0062] In this embodiment, through the above arrangement, the connection portion between the output pole base 012 and the end plate 011 can be improved, thereby the connection reliability between the output pole base 012 and the end plate 011 can be improved. Thus, the position stability of the output pole base 012 can be improved.

[0063] Please refer to Figure 7 , Figure 7 is a layout schematic diagram of the special-shaped through holes 112 provided by the embodiment of the present application. In one embodiment, the two special-shaped through holes 112 are symmetrically arranged. Specifically, each special-shaped through hole 112 is provided with a protrusion 113, and the protrusions 113 of the two special-shaped through holes 112 face each other, as Figure 7 shown, or the protrusions 113 of the two special-shaped through holes 112 face away from each other.

[0064] In this embodiment, by symmetrically arranging the two special-shaped through holes 112 so that the protrusions 113 of the two special-shaped through holes 112 face each other or face away from each other, the force symmetry of the mating portion between the end plate 011 and the output pole base 012 can be improved, thereby the force state of the end plate 011 and the output pole base 012 can be improved, and further the connection reliability therebetween can be improved.

[0065] Please refer to Figure 5 , in one embodiment, the outer peripheral surface of the cap portion 1221 away from the rod portion 1222 is a conical surface 1223, and the small-diameter end of the conical surface 1223 faces away from the rod portion 1222. Thus, the mating between the cap portion 1221 and the release portion 1121 can be guided by the small-diameter end of the conical surface 1223, thereby the smoothness of the mating between the release portion 1121 and the connecting member 122 can be improved. Thus, the ease of operation of mounting the output pole base 012 to the end plate 011 can be improved.

[0066] In one embodiment, the end plate 011 is further provided with a limiting groove 111. The limiting groove 111 is provided on the plate surface of the end plate 011 and is located at one end of the special-shaped through hole 112 away from the output pole base 012. One end of the special-shaped through hole 112 away from the output pole base 012 is communicated with the limiting groove 111; wherein, the release portion 1121 is configured to be located in the limiting groove 111 after the cap portion 1221 passes through the special-shaped through hole 112, and when the locking portion 1122 cooperates with the rod portion 1222, the cap portion 1221 is in a blocking fit with the groove wall of the limiting groove 111.

[0067] Specifically, when installing the output pole base 012 onto the end plate 011, first pass the cap portion 1221 through the release portion 1121 so that the cap portion 1221 is located in the limit groove 111 and the rod portion 1222 is located in the irregular through hole 112. Then move the output pole base 012 towards the locking portion 1122 so that the rod portion 1222 is located in the locking portion 1122.

[0068] When disassembling the output pole base 012 from the end plate 011, push the output pole base 012 so that the rod portion 1222 squeezes through the protrusion 113 and is located in the release portion 1121. Then lift the output pole base 012 in a direction away from the limit groove 111 so that the cap portion 1221 passes through the release portion 1121 and is located outside the end plate 011.

[0069] In this embodiment, by providing the limit groove 111 to achieve the blocking fit between the cap portion 1221 and the end plate 011, the length of the irregular through hole 112 can be controlled, thereby shortening the insertion length between the output pole base 012 and the end plate 011. In this way, the convenience of installing the output pole base 012 onto the end plate 011 can be improved.

[0070] Please refer to Figure 8 , Figure 8 which is a schematic structural diagram of the battery module 002 provided by the embodiment of the present application. Correspondingly, the embodiment of the present application provides a battery module 002. The battery module 002 includes a square shell battery cell 021, a connection row 022, an output pole 023, a cable tie 024, and the aforementioned end plate assembly 001. There are two end plate assemblies 001, and the two end plates 011 are spaced apart. A plurality of square shell battery cells 021 are stacked in sequence between the two end plate assemblies 001. The cable tie 024 binds the end plate assembly 001 and the plurality of square shell battery cells 021 into one body. The connection row 022 connects the plurality of square shell battery cells 021 in series or in parallel. One end of the output pole 023 is connected to the electrode of the battery cell adjacent to the end plate assembly 001. Among them, the output pole 023 is fixed on the side of the body 121 away from the connecting member 122.

[0071] Exemplarily, the cable tie 024 is a stainless steel cable tie 024.

[0072] Among them, the end of the rod portion of the bolt passes through the output pole 023 and is threadedly connected to the output pole base 012, and the head of the bolt abuts against the output pole 023 to press the output pole 023 onto the output pole base 012.

[0073] In this embodiment, by adopting the aforementioned end plate assembly 001, the connector 122 located within the locking portion 1122 can be limited by the protrusion 113, thereby enhancing the positional stability of the output pole base 012; and when maintaining the output pole base 012, by pushing the output pole base 012 to overcome the limitation of the protrusion 113 and locate it in the release portion 1121, it is convenient to withdraw the connector 122 from the release portion 1121 and disassemble the output pole base 012. In this way, the disassembly difficulty of the output pole base 012 can be reduced, and the maintenance convenience of the battery module 002 can be improved.

[0074] Correspondingly, an embodiment of the present application provides a battery, which includes the aforementioned battery module 002.

[0075] It can be understood that the battery may further include a battery box, and the battery module 002 is disposed within the battery box.

[0076] In this embodiment, by adopting the aforementioned battery module 002, the connector 122 located within the locking portion 1122 can be limited by the protrusion 113, thereby enhancing the positional stability of the output pole base 012; and when maintaining the output pole base 012, by pushing the output pole base 012 to overcome the limitation of the protrusion 113 and locate it in the release portion 1121, it is convenient to withdraw the connector 122 from the release portion 1121 and disassemble the output pole base 012. In this way, the disassembly difficulty of the output pole base 012 can be reduced, and the maintenance convenience of the battery can be improved.

[0077] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those skilled in the art, based on the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An end plate assembly, characterized in that: include: The output pole base comprises a body and a connecting member, wherein the connecting member comprises a cap portion and a rod portion, wherein two ends of the rod portion are respectively connected to the body and the cap portion, and the radial dimension of the cap portion is greater than the radial dimension of the rod portion; The end plate is provided with a special-shaped through hole, and along the first direction, the special-shaped through hole includes a releasing portion and a locking portion that are connected, the radial dimension of the releasing portion is larger than the radial dimension of the cap portion, the radial dimension of the locking portion is not smaller than the radial dimension of the rod portion, and the radial dimension of the locking portion is smaller than the radial dimension of the cap portion; Wherein, the first direction is perpendicular to the axis of the special-shaped through hole, the release portion is configured to allow the cap portion to pass through the special-shaped through hole, and the locking portion cooperates with the rod portion to enable the cap portion to engage with the end plate in a blocking manner.

2. The end plate assembly according to claim 1, characterized in that: A protrusion is provided at the connection between the hole wall of the release part and the hole wall of the locking part, and the protrusion is configured to enable the rod to move between the release part and the locking part after elastic deformation under pressure.

3. The end plate assembly according to claim 2, characterized in that: The protrusion is arranged on a side of the hole wall of the special-shaped through hole away from the output pole base, and the side of the protrusion away from the output pole base is arranged opposite to the end of the cap portion.

4. The end plate assembly according to claim 3, characterized in that: Along the axial direction of the special-shaped through hole, the outer surface of the protrusion close to the output pole base smoothly transitions to the hole wall of the special-shaped through hole.

5. The end plate assembly according to claim 2, characterized in that: A side where the outer wall of the protrusion is connected to the hole wall of the release portion is circumscribed with the hole wall of the release portion.

6. The end plate assembly according to any one of claims 2 to 5, characterized in that: A connecting portion between the outer wall of the protrusion and the hole wall of the locking portion is provided with a rounded corner.

7. The end plate assembly according to any one of claims 1 to 5, characterized in that: The release portion is a tapered hole, and the large-diameter end of the tapered hole faces the output pole base.

8. The end plate assembly according to any one of claims 1 to 5, characterized in that: The output pole base includes two connecting pieces, and two special-shaped through holes are arranged at a portion of the end plate for mounting the output pole base, and the two connecting pieces are respectively matched with the two special-shaped through holes.

9. The end plate assembly according to claim 8, characterized in that: The two special-shaped through holes are symmetrically arranged.

10. The end plate assembly according to any one of claims 1 to 5, characterized in that: The outer peripheral surface of the cap portion away from the rod portion is a tapered surface, and the small diameter end of the tapered surface is away from the rod portion.

11. The end plate assembly according to any one of claims 1 to 5, characterized in that: The end plate is further provided with a limiting groove, which is provided on the plate surface of the end plate and is located at the end of the special-shaped through hole away from the output pole base, and the end of the special-shaped through hole away from the output pole base is connected with the limiting groove; Wherein, the release portion is configured to allow the cap portion to be located in the limiting groove after passing through the special-shaped through hole, and when the locking portion cooperates with the rod portion, the cap portion and the groove wall of the limiting groove are blocked and cooperated.

12. A battery module, characterized in that: include: The end plate assembly according to any one of claims 1 to 11, wherein there are two end plate assemblies, and the two end plates are spaced apart; A plurality of square shell battery cells are stacked in sequence on the two end plate assemblies; A cable tie is used to bind the end plate assembly and the plurality of square shell battery cells together; A connecting bar, connecting the plurality of square shell battery cells in series or in parallel; An output pole, one end of which is connected to an electrode of the battery cell adjacent to the end plate assembly; Wherein, the output pole is fixed on a side of the body away from the connecting piece.

13. A battery, characterized in that: Comprising the battery module as claimed in claim 12.

Images