End plate assembly, battery module, battery pack and electric device

Abstract

This utility model provides an endplate assembly, a battery module, a battery pack, and an electrical device. The endplate assembly includes a base and a reinforcing part. The base includes a substrate and multiple flanged structures, all of which are connected to the substrate. The multiple flanged structures are sequentially connected along the circumference of the substrate, so that the multiple flanged structures and the substrate are suitable for forming a mounting groove. The reinforcing part is disposed in the mounting groove and connected to the base. This improves the bending and torsional stiffness of the endplate assembly, effectively resisting the deformation of the battery module caused by cell expansion or external impact during charging and discharging, making the endplate assembly suitable for operating conditions with large expansion forces.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to end plate assemblies, battery modules, battery packs, and electrical equipment. Background Technology

[0002] In related technologies, battery modules typically include multiple battery cells, two end plate assemblies, and cable ties. The two end plate assemblies are located at both ends of the multiple battery cells, and the two end plate assemblies and the multiple battery cells are bound together by cable ties. However, the existing end plate assembly structure is relatively weak and cannot be used in working conditions with greater expansion forces. Utility Model Content

[0003] The embodiments of this utility model provide an end plate assembly, a battery module, a battery pack, and electrical equipment, which can improve the structural strength of the end plate assembly and make the end plate assembly suitable for working conditions with greater expansion forces.

[0004] In a first aspect, embodiments of the present invention provide an endplate assembly.

[0005] In one embodiment, the endplate assembly includes:

[0006] The substrate includes a base plate and a plurality of flanged structures, all of which are connected to the base plate. The plurality of flanged structures are sequentially connected along the circumference of the base plate, such that the plurality of flanged structures and the base plate are adapted to form a mounting groove.

[0007] The reinforcing part is provided in the mounting groove and is connected to the base.

[0008] In one embodiment, the plurality of flange structures include two first flange structures that are opposite to each other and spaced apart along a first direction, and at least one of the two first flange structures is provided with a notch, the notch being connected to the mounting groove;

[0009] The end of the reinforcing part is inserted into the notch.

[0010] In one embodiment, at least one of the two first flange structures is provided with a plurality of the notches, and the plurality of notches are spaced apart along the length direction of the first flange structure;

[0011] The reinforcing part is provided in multiple ways, and each of the notches is fitted with the reinforcing part.

[0012] In one embodiment, at least one of the two first flange structures is bent toward the substrate and forms a first channel between the two substrates, the first channel being connected to the notch;

[0013] At least one end of the reinforcing part is inserted into the first channel through the notch.

[0014] In one embodiment, the inner wall of the first channel is at least partially configured as a first arcuate surface, and the axis of the first arcuate surface is parallel to the length direction of the first flange structure.

[0015] The end of the reinforcing part is at least partially configured as a second arc surface, and the second arc surface is at least partially in contact with the first arc surface.

[0016] In one embodiment, the plurality of flange structures further includes two second flange structures that are arranged opposite to and spaced apart along the length direction of the first flange structure, each second flange structure being connected to the ends of the two first flange structures, and each second flange structure having at least one through hole through the length direction of the first flange structure.

[0017] Each of the first channels is connected to two through holes along the length of the first flange structure at both ends. The first channel and the two through holes are used for fasteners to pass through.

[0018] In one embodiment, the device further includes at least one sleeve, the middle portion of which is located within the first channel, and the two ends of which extend out of the two through holes communicating with the first channel, respectively. The sleeve is used for fasteners to be inserted.

[0019] In one embodiment, at least one end of the reinforcing portion is provided with a through hole along the length direction of the first flange structure, the through hole corresponding to the through hole, and the through hole is used for the fastener to pass through.

[0020] In one embodiment, the first flange structure includes a first flange, a second flange, and a third flange connected in sequence. The first flange is connected to the substrate and is set at an angle to the substrate. The second flange is opposite to and spaced apart from the substrate. The third flange is opposite to and spaced apart from the first flange. The third flange has the notch formed, and the first flange, the second flange, and the third flange together with the substrate form the first channel.

[0021] In one embodiment, the end of the third flange furthest from the second flange is connected to the substrate.

[0022] In one embodiment, a limiting protrusion is further included, and the plurality of flange structures include two first flange structures that are opposite to each other and spaced apart along a first direction, at least one of the two first flange structures being provided with the limiting protrusion, the limiting protrusion being used to abut against the end face of the cable tie.

[0023] In one embodiment, multiple limiting protrusions are provided, and the multiple limiting protrusions are spaced apart along the length direction of the first flange structure.

[0024] In one embodiment, the reinforcing part includes a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate connected in sequence. The first reinforcing plate and the third reinforcing plate are arranged opposite to each other and spaced apart. The second reinforcing plate is arranged opposite to the bottom of the mounting groove. At least two of the first reinforcing plate, the second reinforcing plate, and the third reinforcing plate are connected to the substrate.

[0025] In one embodiment, the ends of the first reinforcing plate and the third reinforcing plate away from the second reinforcing part abut against the bottom of the mounting groove.

[0026] Secondly, embodiments of this utility model provide a battery module.

[0027] In one embodiment, the battery module includes:

[0028] As described above, the endplate assembly;

[0029] Multiple battery cells are arranged sequentially along a second direction, and each end of the multiple battery cells arranged in the second direction is provided with the end plate assembly;

[0030] Cable ties, which bind the two end plate assemblies and the plurality of battery cells together as one unit.

[0031] Thirdly, embodiments of this utility model provide a battery pack.

[0032] In one embodiment, the battery pack includes a battery module as described above.

[0033] Fourthly, embodiments of this utility model provide an electrical device.

[0034] In one embodiment, the electrical device includes a battery pack as described above.

[0035] The beneficial effects of the embodiments of this utility model are as follows:

[0036] In this embodiment of the invention, the substrate serves as the main load-bearing surface, with multiple flanged structures connected sequentially along its circumference to form a three-dimensional structure resembling a "frame." This design significantly improves the bending and torsional stiffness of the end plate assembly, enabling it to effectively resist deformation caused by cell expansion or external impacts during charging and discharging of the battery module. The flanged structures, through sheet metal bending, reduce material usage while ensuring the strength of the end plate assembly, achieving a lightweight design. The reinforcing portion located within the mounting groove prevents deformation of the mounting groove's sidewalls due to cell expansion or external pressure, further enhancing the structural strength of the end plate assembly and making it suitable for applications with high expansion forces. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional schematic diagram of a battery module (partial structure) provided in an embodiment of this utility model;

[0039] Figure 2 yes Figure 1 The enlarged view of point A;

[0040] Figure 3 This is a three-dimensional schematic diagram of the end plate assembly provided in an embodiment of this utility model;

[0041] Figure 4 yes Figure 3 Exploded view of the endplate assembly;

[0042] Figure 5 yes Figure 3 The endplate assembly shown is a cross-sectional view along the length of the first flange structure.

[0043] Figure 6 yes Figure 3 The endplate assembly shown is a cross-sectional view along the length of the second flange structure.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Battery module; 10. End plate assembly; 1. Substrate; 11. Base plate; 12. Flanged structure; 121. First flanged structure; 1211. Notch; 1212. First channel; 12121. First arc surface; 1213. First flange; 1214. Second flange; 1215. Third flange; 122. Second flanged structure; 1221. Through hole; 1222. Second channel; 123. Lifting hole; 124. Third flanged structure; 1241. Mounting hole; 13. Mounting groove; 2. Reinforcing part; 21. Second arc surface; 22. Through hole; 23. First reinforcing plate; 24. Second reinforcing plate; 25. Third reinforcing plate; 3. Sleeve; 4. Limiting protrusion; a. Reinforcing cavity; 20. Battery cell; 30. Cable tie. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0047] In related technologies, battery modules typically include multiple battery cells, two end plate assemblies, and cable ties. The two end plate assemblies are located at both ends of the multiple battery cells, and the two end plate assemblies and the multiple battery cells are bound together by cable ties. However, the existing end plate assembly structure is relatively weak and cannot be used in working conditions with greater expansion forces.

[0048] In view of this, the present invention proposes an electrical device, which includes a battery pack, and the battery pack includes a battery module 100.

[0049] It should be noted that the electrical equipment can be vehicles, energy storage power supplies, consumer electronics, medical equipment, or smart cities, etc. Specifically, this application does not limit this.

[0050] Reference Figure 1 and Figure 2The battery module 100 includes end plate assemblies 10, multiple battery cells 20, and cable ties 30. The multiple battery cells 20 are arranged sequentially along a second direction, with end plate assemblies 10 attached to both ends of each arranged battery cell 20. The cable ties 30 bind two end plate assemblies 10 and the multiple battery cells 20 together. Thus, the end plate assemblies 10, located at both ends of the arranged battery cells 20, provide a stable support structure for the entire battery module 100. The end plate assemblies 10 can withstand external impacts that the module may experience during transportation, installation, and use, preventing damage to the battery cells 20 due to collisions. The cable ties 30 tightly bind two end plate assemblies 10 and the multiple battery cells 20 together, further enhancing the overall structural strength of the module. This binding method ensures that the relative positions of the battery cells 20 are fixed, reducing performance degradation or safety hazards caused by cell movement.

[0051] Figures 3 to 6 This is a schematic diagram of an embodiment of the end plate assembly 10 provided by this utility model. The end plate assembly will be described in detail below with reference to the main drawings.

[0052] Reference Figures 3 to 6 The end plate assembly 10 includes a base 1 and a reinforcing part 2. The base 1 includes a substrate 11 and a plurality of flange structures 12. The plurality of flange structures 12 are all connected to the substrate 11. The plurality of flange structures 12 are sequentially connected along the circumference of the substrate 11 so that the plurality of flange structures 12 and the substrate 11 are adapted to form a mounting groove 13. The reinforcing part 2 is disposed in the mounting groove 13 and is connected to the base 1.

[0053] In this embodiment of the invention, the substrate 11 serves as the main bearing surface, and multiple flanged structures 12 are sequentially connected along its circumference to form a three-dimensional structure resembling a "frame". This design significantly improves the bending and torsional stiffness of the end plate assembly 10, enabling the end plate assembly 10 to effectively resist deformation of the battery module 100 caused by the expansion of the cell 20 or external impact during charging and discharging. The flanged structures 12 reduce material usage while ensuring the strength of the end plate assembly 10 through sheet metal bending, achieving a lightweight design for the end plate assembly 10. The reinforcing part 2 is located in the mounting groove 13 to prevent deformation of the sidewall of the mounting groove 13 caused by the expansion of the cell 20 or external pressure, further improving the structural strength of the end plate assembly 10, making the end plate assembly 10 suitable for working conditions with large expansion forces.

[0054] It should be noted that, in one embodiment, the reinforcing part 2 can be used to support the sidewall of the mounting groove 13. In another embodiment, the reinforcing part 2 can also strengthen the structural strength of the entire end plate assembly 10. Specifically, this application does not limit the specific function of the reinforcing part 2.

[0055] Reference Figure 3 and Figure 4In some embodiments, the plurality of flange structures 12 include two first flange structures 121 arranged opposite to each other and spaced apart along a first direction. At least one of the two first flange structures 121 is provided with a notch 1211, which communicates with the mounting groove 13. The end of the reinforcing part 2 is inserted into the notch 1211. Thus, the end of the reinforcing part 2 is inserted into the notch 1211 of the first flange structure 121, forming a "mortise and tenon" connection between the reinforcing part 2 and the first flange structure 121, significantly enhancing the bonding strength between the base 1 and the reinforcing part 2. This interlocking structure can effectively resist lateral forces (such as the thrust generated by the expansion of the battery cell 20) and torque, preventing the reinforcing part 2 from loosening or falling off, thereby improving the overall deformation resistance of the end plate assembly 10. The notch 1211 provides a precise installation guide for the reinforcing part 2, allowing workers or automated equipment to quickly insert the reinforcing part 2 into the designated position, reducing assembly errors and time. The notch 1211 can also reduce the weight of the end plate assembly 10.

[0056] Reference Figure 4 In some embodiments, at least one of the two first flange structures 121 is provided with a plurality of notches 1211, which are spaced apart along the length of the first flange structure 121. A plurality of reinforcing parts 2 are provided, and a reinforcing part 2 is inserted into each notch 1211. In this way, the provision of multiple reinforcing parts 2 enhances the end plate assembly 10's resistance to deformation and increases the structural strength of the end plate assembly 10.

[0057] Reference Figure 5 In some embodiments, at least one of the two first flange structures 121 is bent toward the substrate 11 and forms a first channel 1212 between them. This enhances the rigidity and strength of the first flange structure 121. The first channel 1212 communicates with the notch 1211, and at least one end of the reinforcing part 2 is inserted into the first channel 1212 through the notch 1211. This prevents at least one end of the reinforcing part 2 from being exposed, improving the aesthetics of the end plate assembly 10.

[0058] Continue to refer to Figure 5 In some embodiments, the inner wall of the first channel 1212 is at least partially configured as a first arcuate surface 12121, the axis of which is parallel to the length direction of the first flange structure 121. The end of the reinforcing part 2 is at least partially configured as a second arcuate surface 21, which is in at least partial contact with the first arcuate surface 12121. Thus, the contact between the first arcuate surface 12121 and the second arcuate surface 21 is a surface contact, resulting in a more uniform stress distribution and preventing stress concentration. Furthermore, the at least partial contact between the second arcuate surface 21 and the first arcuate surface 12121 allows the reinforcing part 2 to better support the flange structure 12, preventing deformation of the flange structure 12.

[0059] It should be noted that the at least partial contact between the second arc surface 21 and the first arc surface 12121 includes two schemes: partial contact between the second arc surface 21 and the first arc surface 12121, and complete contact between the second arc surface 21 and the first arc surface 12121. When the second arc surface 21 and the first arc surface 12121 are in complete contact, the second arc surface 21 and the first arc surface 12121 can be completely fitted together. This means that when the two end plate assemblies 10 and multiple battery cells 20 are bundled together by the cable ties 30, as the battery cells 20 expand and the cable ties 30 are stretched, the end plate assembly 10 will be subjected to the reaction force of the cable ties 30 being stretched. At this time, the second arc surface 21 and the first arc surface 12121 are completely fitted together, and the reinforcing part 2 provides support to the second arc surface 21, preventing it from deforming due to the reaction force of the cable ties 30 being stretched.

[0060] To improve the strength of the end plate assembly 10, the reinforcing part 2 and the base 1 are fixedly connected. The method of fixing the reinforcing part 2 and the base 1 can be selected as needed. For example, in one embodiment, the reinforcing part 2 and the base 1 are welded together, so that when the end plate assembly is subjected to the outward compressive force of the cell expansion, the reinforcing part 2 increases the structural strength of the base 1, enabling the end plate assembly 10 to withstand greater forces.

[0061] It should be noted that the welding point between the reinforcing part 2 and the base 1 can be selected as needed. For example, in one embodiment, the short side of the reinforcing part 2 is welded to the side wall surface parallel to the base 1. In another embodiment, the long side of the reinforcing part 2 can also be welded to the side wall surface parallel to the base 1. The best effect is achieved when both the short side of the reinforcing part 2 and the side wall surface parallel to the base 1 are welded to the base 1.

[0062] In other embodiments, the reinforcing part 2 is also fixedly connected to the base 1 by screws. Specifically, this application does not limit this.

[0063] Reference Figure 3 and Figure 4In some embodiments, the plurality of flange structures 12 further include two second flange structures 122 arranged opposite to and spaced apart along the length direction of the first flange structure 121, each second flange structure 122 being connected to the ends of the two first flange structures 121. This enhances the strength and rigidity of the end plate assembly 10, preventing deformation of the end plate assembly 10 due to the large expansion force of the battery cell 20. Each second flange structure 122 has at least one through hole 1221 extending along the length direction of the first flange structure 121, and both ends of each first channel 1212 are connected to the two through holes 1221 arranged along the length direction of the first flange structure 121. The first channel 1212 and the two connected through holes 1221 provide installation positions for fasteners, facilitating the fixing of the battery module 100 with the end plate assembly 10 to the battery pack housing using fasteners.

[0064] It should be noted that the specific structure of the second flange structure 122 can be set as needed. For example, in one embodiment, the second flange structure 122 may include a fourth flange that is angled to the substrate 11 and connected to the substrate. In other embodiments, the second flange structure 122 may also be bent toward the substrate 11 and form a second channel 1222 between itself and the substrate 11, thereby enhancing the strength of the second flange structure 122.

[0065] Reference Figure 4 In some embodiments, the end plate assembly 10 further includes at least one sleeve 3, the middle of which is located within the first channel 1212. Both ends of the sleeve 3 extend out through two through holes 1221 communicating with the first channel 1212. The sleeve 3 is used for fasteners to pass through. Thus, the sleeve 3 ensures that when the battery module 100 with the end plate assembly 10 is fixed to the battery pack housing by fasteners, the contact between the fasteners and the periphery of the through holes 1221 is changed to contact with the end face of the sleeve 3. This effectively prevents the periphery of the through holes 1221 from being crushed and deformed by the pressure of the fasteners. Furthermore, the sleeve 3 can further improve the structural strength and rigidity of the end plate assembly 10.

[0066] It should be noted that the cross-sectional shape of the sleeve 3 is the same as that of the through hole 1221. Specifically, the cross-sectional shape of the sleeve 3 can be selected as needed. For example, the cross-sectional shape of the sleeve 3 can be circular, elliptical, or U-shaped, etc. Specifically, this application does not limit this.

[0067] Continue to refer to Figure 4In some embodiments, at least one end of the reinforcing part 2 is provided with a through hole 22 along the length direction of the first flange structure 121. The through hole 22 corresponds to the through hole 1221, and the through hole 22 is used for the fastener to pass through. In this way, when the fastener passes through the through hole 22, the contact area between the end plate assembly 10 and the fastener is increased, so that the stress distribution between the fastener and the end plate assembly 10 is uniform, stress concentration is avoided, and the service life of the end plate assembly 10 is improved.

[0068] It should be noted that when the sleeve 3 is installed, the through hole 22 can also allow the sleeve 3 to pass through. The sleeve 3 passing through the through hole 22 positions the reinforcing part 2, preventing it from shaking and facilitating subsequent fixing of the reinforcing part 2 to the base 1. This application does not limit the shape of the through hole 22, as long as it allows the fastener and sleeve 3 to pass through. The best installation effect is achieved when the cross-sectional shape of the through hole 22, the sleeve 3, and the fastener are the same.

[0069] Reference Figure 4 and Figure 5 In some embodiments, the first flange structure 121 includes a first flange 1213, a second flange 1214, and a third flange 1215 connected in sequence. The first flange 1213 is connected to the substrate 11 and is set at an angle to the substrate 11. The second flange 1214 is opposite to and spaced apart from the substrate 11. The third flange 1215 is opposite to and spaced apart from the first flange 1213. The third flange 1215 has a notch 1211, and the first flange 1213, the second flange 1214, and the third flange 1215, together with the substrate 11, form a first channel 1212. Thus, the first channel 1212 can be regarded as a hollow reinforcing rib structure, which improves the structural strength and deformation resistance of the end plate assembly 10.

[0070] In some embodiments, the end of the third flange 1215 away from the second flange 1214 is connected to the substrate 11. In this way, both the third flange 1215 and the first flange 1213 can provide support for the second flange structure 122, which improves the stability and deformation resistance of the second flange 1214, and ensures that the second flange 1214 does not deform or collapse when the cable tie 30 applies a force to the second flange 1214.

[0071] It should be noted that the way the end of the third flange 1215 furthest from the second flange 1214 is connected to the substrate 11 can be selected as needed. For example, in one embodiment, the end of the third flange 1215 furthest from the second flange 1214 can be fixed to the substrate 11 by welding, snap-fitting, or adhesive bonding. Specifically, this application does not limit this.

[0072] Reference Figure 2 , Figure 5 and Figure 6 In some embodiments, the end plate assembly 10 further includes a limiting protrusion 4, and the plurality of flange structures 12 include two first flange structures 121 that are opposite to each other and spaced apart along a first direction. At least one of the two first flange structures 121 is provided with a limiting protrusion 4, which is used to abut against the end face of the cable tie 30. Thus, since the limiting protrusion 4 abuts against the end face of the cable tie 30, the limiting protrusion can prevent the cable tie 30 from falling off or the large surface of the cable tie 30 from not being fully attached to the contact surface of the flange structure 12, and prevent the cable tie 30 from breaking due to uneven force during the expansion of the battery cell 20.

[0073] It should be noted that the shape of the limiting protrusion 4 can be set as needed, and this application does not limit the shape of the limiting protrusion 4.

[0074] In some embodiments, multiple limiting protrusions 4 are provided, and the multiple limiting protrusions 4 are spaced apart along the length direction of the first flange structure 121, so that the end plate assembly 10 can limit multiple cable ties 30. In addition, this design allows the cable ties 30 to be limited by at least one of the limiting protrusions 4 as needed, improving the versatility and adaptability of the end plate assembly 10.

[0075] Reference Figure 3 and Figure 4 In some embodiments, at least one of the plurality of flange structures 12 is provided with a lifting hole 123 for inserting a lifting fixture. This allows the battery module 100 with the end plate assembly 10 to be lifted to the desired position using the lifting fixture, simplifying the operation and reducing the workload of workers.

[0076] Continue to refer to Figure 3 In some embodiments, the plurality of flange structures 12 include a third flange structure 124 for placement near the top of the battery cell 20. The third flange structure 124 is provided with mounting holes 1241, through which the output stage base can be fixedly installed to the end plate assembly 10, which is simple to operate.

[0077] Reference Figure 4In some embodiments, the reinforcing part 2 includes a first reinforcing plate 23, a second reinforcing plate 24, and a third reinforcing plate 25 connected sequentially. The first reinforcing plate 23 and the third reinforcing plate 25 are arranged opposite each other and spaced apart, while the second reinforcing plate 24 is arranged opposite to the bottom of the mounting groove 13. This creates a multi-plate combined reinforcing structure for the reinforcing part 2. Compared to a single plate, this multi-plate structure can withstand greater external forces, significantly improving the structural strength of the reinforcing part 2 and making it less prone to deformation or damage under various complex stresses. The arrangement of the first reinforcing plate 23 and the third reinforcing plate 25 opposite each other and spaced apart increases the structural hierarchy of the reinforcing part 2. When subjected to external forces, the space between the first reinforcing plate 23 and the third reinforcing plate 25 can provide a buffer zone, dispersing stress and preventing stress concentration at a single point or line, thereby further enhancing the structure's resistance to damage. At least two of the first reinforcing plate 23, the second reinforcing plate 24, and the third reinforcing plate 25 are connected to the base 1. This increases the number of connection points between the reinforcing part 2 and the base 1. Multiple connection points can share the force between the reinforcing part 2 and the base 1, reducing the force on a single connection point and lowering the risk of connection point failure, thereby improving the reliability and stability of the connection between the reinforcing part 2 and the base 1.

[0078] Reference Figure 3 In some embodiments, the ends of the first reinforcing plate 23 and the third reinforcing plate 25 furthest from the second reinforcing part 24 abut against the bottom of the mounting groove 13. This increases the contact area between the reinforcing part 2 and the base 1, making the connection between the reinforcing part 2 and the base 1 more stable. In addition, a reinforcing cavity a is formed between the first reinforcing plate 23, the second reinforcing plate 24, the third reinforcing plate 25 and the bottom of the mounting groove 13. The presence of the reinforcing cavity a greatly improves the structural strength and rigidity of the end plate assembly 10, making the end plate assembly 10 suitable for working conditions with large expansion forces.

[0079] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An endplate assembly, characterized in that, include: The substrate includes a base plate and a plurality of flanged structures, all of which are connected to the base plate. The plurality of flanged structures are sequentially connected along the circumference of the base plate, such that the plurality of flanged structures and the base plate are adapted to form a mounting groove. The reinforcing part is provided in the mounting groove and is connected to the base.

2. The endplate assembly according to claim 1, characterized in that, The plurality of flange structures include two first flange structures that are opposite to each other and spaced apart along a first direction, and at least one of the two first flange structures is provided with a notch, the notch being connected to the mounting groove; The end of the reinforcing part is inserted into the notch.

3. The end plate assembly according to claim 2, characterized in that, At least one of the two first flange structures is provided with a plurality of said notches, and the plurality of said notches are spaced apart along the length direction of the first flange structure; The reinforcing part is provided in multiple ways, and each of the notches is fitted with the reinforcing part.

4. The endplate assembly according to claim 2 or 3, characterized in that, At least one of the two first flange structures is bent toward the substrate and forms a first channel between the substrate and the substrate, the first channel being connected to the notch; At least one end of the reinforcing part is inserted into the first channel through the notch.

5. The end plate assembly according to claim 4, characterized in that, The inner wall of the first channel is at least partially configured as a first arc surface, and the axis of the first arc surface is parallel to the length direction of the first flange structure. The end of the reinforcing part is at least partially configured as a second arc surface, and the second arc surface is at least partially in contact with the first arc surface.

6. The endplate assembly according to claim 4, characterized in that, The plurality of flange structures further include two second flange structures that are arranged opposite to and spaced apart along the length direction of the first flange structure. Each second flange structure is connected to the ends of the two first flange structures, and each second flange structure is provided with at least one through hole along the length direction of the first flange structure. Each of the first channels is connected to two through holes along the length of the first flange structure at both ends. The first channel and the two through holes are used for fasteners to pass through.

7. The endplate assembly according to claim 6, characterized in that, It also includes at least one sleeve, the middle part of which is located in the first channel, and the two ends of which extend out of the two through holes that are connected to the first channel, and the sleeve is used for fasteners to be inserted.

8. The endplate assembly according to claim 6, characterized in that, At least one end of the reinforcing part is provided with a through hole along the length direction of the first flange structure. The through hole corresponds to the through hole and is used for the fastener to pass through.

9. The endplate assembly according to claim 4, characterized in that, The first flange structure includes a first flange, a second flange, and a third flange connected in sequence. The first flange is connected to the substrate and is set at an angle to the substrate. The second flange is opposite to the substrate and spaced apart. The third flange is opposite to the first flange and spaced apart. The third flange has the notch formed. The first flange, the second flange, and the third flange together with the substrate form the first channel.

10. The endplate assembly according to claim 9, characterized in that, The end of the third flange furthest from the second flange is connected to the substrate.

11. The endplate assembly according to any one of claims 1 to 3, characterized in that, It also includes a limiting protrusion, and the plurality of the flange structures include two first flange structures that are opposite to each other and spaced apart along a first direction, at least one of the two first flange structures is provided with the limiting protrusion, the limiting protrusion being used to abut against the end face of the cable tie.

12. The endplate assembly according to claim 11, characterized in that, Multiple limiting protrusions are provided, and the multiple limiting protrusions are arranged at intervals along the length direction of the first flange structure.

13. The endplate assembly according to any one of claims 1 to 3, characterized in that, The reinforcing part includes a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate connected in sequence. The first reinforcing plate and the third reinforcing plate are arranged opposite each other and spaced apart. The second reinforcing plate is arranged opposite to the bottom of the mounting groove. At least two of the first reinforcing plate, the second reinforcing plate, and the third reinforcing plate are connected to the base.

14. The endplate assembly according to claim 13, characterized in that, The ends of the first reinforcing plate and the third reinforcing plate furthest from the second reinforcing plate abut against the bottom of the mounting groove.

15. A battery module, characterized in that, include: The endplate assembly as described in any one of claims 1 to 14; Multiple battery cells are arranged sequentially along a second direction, and each end of the multiple battery cells arranged in the second direction is provided with the end plate assembly; Cable ties, which bind the two end plate assemblies and the plurality of battery cells together as one unit.

16. A battery pack, characterized in that, Includes the battery module as described in claim 15.

17. An electrical appliance, characterized in that, Includes the battery pack as described in claim 16.

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