End plate assembly, battery packaging mechanism, battery pack and vehicle

Abstract

The utility model relates to battery technology field discloses a kind of end plate assembly, battery packaging mechanism, battery pack and vehicle, the end plate assembly in with electric core is assembled, first elastic piece is compressedly clamped between end plate and electric core, and then pre-tightening force is provided to electric core by first elastic piece, to improve the installation stability of electric core.Simultaneously, when battery appears cyclic expansion, second elastic piece can be in abutment with electric core, to make second elastic piece can also produce elastic deformation, and then bounce back force is provided to electric core by second elastic piece, can avoid electric core excessive expansion, be conducive to improving the cycle life of electric core.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an end plate assembly, a battery packaging mechanism, a battery pack, and a vehicle. Background Technology

[0002] In related technologies, multiple battery cells are stacked along a predetermined direction to form a battery pack. The battery cell located at one end of the battery pack along this predetermined direction is referred to as the end cell. During battery pack assembly, an end plate is usually placed on the side of the end cell that faces away from the other cells along this predetermined direction to support and position the battery pack. During battery use, the battery cells undergo cyclic expansion. Existing end plates are made of rigid materials such as metal, which cannot provide cushioning and can easily affect the cycle life of the battery cells.

[0003] Some manufacturers install an elastic pushing mechanism between the end plate and the battery pack to provide a certain preload to the battery pack. Although this elastic pushing mechanism can generate a certain elastic deformation when the cell expands, the deformation is extremely limited and still cannot improve the impact on the cycle life of the cell. Utility Model Content

[0004] The purpose of this invention is to provide an end plate assembly, a battery packaging mechanism, a battery pack, and a vehicle that can improve the installation stability and cycle life of the battery cells.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Endplate assembly, including:

[0007] End plate;

[0008] A first elastic element is provided along a first direction and is sandwiched between the end plate and the battery cell. The first elastic element is configured to provide a preload force to the battery cell. The first elastic element has a through hole that extends along the first direction.

[0009] The second elastic element is disposed within the through hole.

[0010] As a preferred technical solution of the above-mentioned end plate assembly, along the first direction, one end of the second elastic member is connected to the end plate, and the second surface of the second elastic member away from the end plate is recessed relative to the first surface of the first elastic member away from the end plate; when the first elastic member is compressed, the second surface can be flush with the first surface.

[0011] As a preferred technical solution for the above-mentioned end plate assembly, along the first direction, the thickness of the battery cell is H1, the thickness of the first elastic member when it is not compressed is H2, and the thickness of the second elastic member when it is not compressed is H3.

[0012] 0mm < H2 ≤ 0.1H1; and / or, 0mm < H3 ≤ 1.5H2.

[0013] As a preferred technical solution for the above-mentioned end plate assembly, the initial compression rate of the first elastic member ranges from 30% to 70%.

[0014] And / or, the range of the rebound force when the first elastic element undergoes elastic deformation is 30kPa to 300kPa;

[0015] And / or, when the pressure applied to the second elastic element is 0.7 MPa, the compression ratio of the second elastic element is not less than 15%.

[0016] As a preferred technical solution for the above-mentioned end plate assembly, the first elastic element is a first elastic pad;

[0017] And / or, the second elastic element is a second elastic pad.

[0018] As a preferred embodiment of the above-mentioned end plate assembly, the contour edge of the first elastic member is flush with the contour edge of the end plate.

[0019] As a preferred technical solution for the above-mentioned end plate assembly, along the first direction, the sum of the projected area of ​​the first elastic element and the projected area of ​​the second elastic element is equal to the projected area of ​​the end plate.

[0020] As a preferred technical solution for the above-mentioned end plate assembly, the end plate is provided with a reinforcing structure on the side opposite to the first elastic member along the first direction.

[0021] As a preferred technical solution for the above-mentioned endplate assembly, the reinforcing structure includes a first protrusion extending along the second direction;

[0022] And / or, the reinforcing structure includes a second protrusion extending along a third direction;

[0023] The first direction, the second direction, and the third direction are perpendicular to each other.

[0024] To achieve the above objectives, the present invention also provides a battery packaging mechanism, including an end plate assembly as described in any of the preceding claims.

[0025] As a preferred technical solution of the above-mentioned battery packaging mechanism, at least two of the battery cells are stacked along the first direction to form a battery pack; two end plate assemblies are provided, and the two end plate assemblies are respectively located at both ends of the battery pack along the first direction.

[0026] As a preferred technical solution of the above-mentioned battery packaging mechanism, it also includes a support structure, wherein the end plate abuts against the support structure on the side opposite to the battery cell along the first direction.

[0027] As a preferred technical solution of the above-mentioned battery packaging mechanism, the end plate is provided with a guide portion on the side facing the support structure along the first direction, and the guide portion can guide the end plate to be inserted between the support structure and the battery cell.

[0028] As a preferred technical solution of the above-mentioned battery packaging mechanism, it also includes a housing, the housing including an installation space for accommodating the battery cells, and the support structure is provided in the installation space.

[0029] To achieve the above objectives, the present invention also provides a battery pack, including an end plate assembly as described in any of the preceding claims, or including a battery encapsulation mechanism as described in any of the preceding claims.

[0030] To achieve the above objectives, the present invention also provides a vehicle including an endplate assembly as described in any of the preceding claims, or including a battery encapsulation mechanism as described in any of the preceding claims, or a battery pack as described above.

[0031] This utility model has at least the following beneficial effects:

[0032] The end plate assembly provided by this utility model, when assembled with a battery cell, has a first elastic member compressed and clamped between the end plate and the battery cell, thereby providing a preload force to the battery cell to improve its installation stability. Simultaneously, when the battery undergoes cyclic expansion, a second elastic member can abut against the battery cell, allowing it to also undergo elastic deformation and provide a rebound force to the battery cell. This prevents excessive expansion of the battery cell and helps improve its cycle life.

[0033] The battery packaging mechanism, battery pack, and vehicle provided by this utility model can improve the cycle life of the battery pack and reduce the cost of use by applying the above-mentioned end plate assembly. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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 the content of the embodiments of this utility model and these drawings without creative effort.

[0035] Figure 1 Exploded view of the end plate assembly and battery cell provided in an embodiment of this utility model;

[0036] Figure 2 This is a schematic diagram of the end plate assembly and battery cell provided in an embodiment of the present utility model;

[0037] Figure 3 A schematic diagram of the end plate assembly, battery cell, and support structure provided in an embodiment of this utility model.

[0038] In the picture:

[0039] 100. Battery cell; 1. End plate; 11. Guide section; 12. First protrusion; 13. Second protrusion; 2. First elastic element; 21. Through hole; 3. Second elastic element; 4. Support structure. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] like Figures 1 to 3 As shown, an embodiment of this utility model provides a battery pack, which includes a battery group and a battery encapsulation mechanism surrounding the battery group. The battery encapsulation mechanism can protect the battery group and improve the safety and ease of use of the battery pack.

[0045] In some embodiments, the battery pack includes at least two cells 100 stacked along a first direction. Increasing the number of cells 100 can improve the energy density of the battery pack. Of course, in other embodiments, the battery pack may also include a single cell 100; this embodiment does not limit the number of cells 100 included in the battery pack.

[0046] The battery packaging mechanism includes an end plate assembly, specifically, the end plate assembly is located at one end of the battery pack along a first direction. That is, the end plate assembly abuts against the battery cell 100 located at one end of the battery pack along the first direction.

[0047] The end plate assembly includes an end plate 1, a first elastic member 2, and a second elastic member 3. Along a first direction, the first elastic member 2 is sandwiched between the end plate 1 and the battery cell 100. The first elastic member 2 is configured to provide a preload force to the battery cell 100. The first elastic member 2 is provided with a through hole 21 that extends along the first direction. The second elastic member 3 is disposed in the through hole 21.

[0048] In this embodiment, when the end plate assembly is assembled with the battery cell 100, the first elastic member 2 is compressed and clamped between the end plate 1 and the battery cell 100 (i.e., the battery cell 100 located at one end of the battery pack along the first direction). The first elastic member 2 provides a preload force to the battery cell 100, thereby improving the installation stability of the battery cell 100. Simultaneously, when the battery undergoes cyclic expansion, the second elastic member 3 can abut against the battery cell 100, allowing the second elastic member 3 to also undergo elastic deformation. This provides a rebound force to the battery cell 100, preventing excessive expansion of the battery cell 100 and improving its cycle life.

[0049] In some embodiments, the battery packaging mechanism further includes a support structure 4, with the end plate 1 abutting against the support structure 4 on the side opposite to the cell 100 along a first direction. During the battery packaging process, the end plate 1 abuts against the support structure 4 on the side opposite to the first elastic member 2 along the first direction, thereby supporting and positioning the end plate 1 through the support structure 4. At this time, the first elastic member 2 is compressed and clamped between the adjacent cell 100 and the end plate 1, thereby providing an initial preload force to the cell 100.

[0050] Specifically, the battery packaging mechanism also includes a housing, which includes an installation space for accommodating the battery cell 100, and a support structure 4 is provided within the installation space. During the battery pack assembly process, the battery pack is placed into the installation space, and the housing can enclose the battery pack to improve its protection and safety. For example, the support structure 4 is a crossbeam of the housing. After the battery pack and end plate assembly are placed into the housing, the end plate 1 contacts the crossbeam. The crossbeam ensures the position of the end plate 1 and the compression of the first elastic member 2, thereby providing initial preload force around the battery cell 100.

[0051] In other embodiments, the battery packaging mechanism may include fasteners such as cable ties to bind and secure the end plate assembly to the battery pack, so that the first elastic member 2 is compressedly clamped between the adjacent cell 100 and the end plate 1.

[0052] In some embodiments, the end plate 1 has a guide portion 11 on the side facing the support structure 4 along a first direction. The guide portion 11 can guide the end plate 1 to be inserted between the support structure 4 and the battery cell 100, thereby improving the assembly convenience of the end plate 1. Exemplarily, the guide portion 11 is chamfered, and the chamfer is provided at the first end of the end plate 1. When assembling the end plate 1, the first end is first inserted between the support structure 4 and the battery cell 100, and then the chamfer plays a guiding role, improving the assembly convenience of the end plate 1.

[0053] In some embodiments, two end plate assemblies are provided, and the two end plate assemblies are respectively located at both ends of the battery pack along the first direction, thereby providing pre-tightening force to the battery cells 100 located at both ends of the battery pack along the first direction, which can improve the uniformity of force on the battery pack and help improve the cycle life of the battery cells 100.

[0054] In some embodiments, along the first direction, one end of the second elastic member 3 is connected to the end plate 1, and the second surface of the second elastic member 3 away from the end plate 1 is recessed relative to the first surface of the first elastic member 2 away from the end plate 1; when the first elastic member 2 is compressed, the second surface can be flush with the first surface. That is, during battery pack assembly, a gap is provided between the end of the second elastic member 3 away from the end plate 1 and the cell 100, thereby reserving space for the expansion of the cell 100. Furthermore, when the cell 100 expands, the cell 100 can further compress the first elastic member 2, so that the cell 100 abuts against the second elastic member 3, and the cell 100 can also cause the second elastic member 3 to undergo elastic deformation, thereby providing a rebound force to the cell 100 through the second elastic member 3, which can prevent the cell 100 from over-expanding and is beneficial to improving the cycle life of the cell 100.

[0055] In some embodiments, the first elastic member 2 is a first elastic pad. It is understood that the first elastic pad has a ring-shaped structure. This not only provides sufficient preload around the battery cell 100, but also improves the uniformity of force distribution on the battery cell 100, and helps reduce the space occupied by the first elastic member 2, thereby increasing the energy density of the battery pack.

[0056] In some embodiments, the second elastic member 3 is a second elastic pad, which can increase the contact area between the second elastic member 3 and the battery cell 100 when the battery cell 100 undergoes cyclic expansion, improve the uniformity of force on the battery cell 100, and help reduce the space occupied by the first elastic member 2, so as to improve the energy density of the battery pack.

[0057] For example, the first elastic pad is bonded and fixed to the end plate 1. The second elastic pad is bonded and fixed to the end plate 1.

[0058] For example, the first elastic pad is made of foam material, which provides sufficient rebound force to the battery cell 100, and also helps to improve the thermal insulation and integration of the end plate assembly, while achieving weight reduction. The second elastic pad is made of foam material, which provides sufficient rebound force to the battery cell 100, and also helps to improve the thermal insulation and integration of the end plate assembly, while achieving weight reduction. In other embodiments, the second elastic pad can also be made of other materials that can provide cushioning, such as aerogel materials. Aerogel materials have advantages such as extremely low thermal conductivity and lightweight design, thus allowing the second elastic pad to meet the requirements of thermal insulation and weight reduction with only a small thickness.

[0059] In some embodiments, along the first direction, the thickness of the cell 100 is H1, and the thickness of the first elastic member 2 when uncompressed is H2; 0mm < H2 ≤ 0.1H1. It should be noted that along the first direction, the expansion amount of the cell 100 is related to the thickness of the cell 100. By limiting 0mm < H2 ≤ 0.1H1, the first elastic member 2 can provide sufficient preload to the cell 100 while ensuring the expansion space of the cell 100, thereby improving the integration of the battery pack.

[0060] In some embodiments, the thickness of the second elastic member 3 when uncompressed along the first direction is H3; 0mm < H3 ≤ 1.5H2. By limiting the value of H3, the preload force on the battery cell 100 and the resistance encountered when the battery cell 100 expands can be adjusted to meet different needs.

[0061] It should be noted that, since the first elastic member 2 is compressed and sandwiched between the end plate 1 and the cell 100, if H3 is greater than 0 mm and less than or equal to the thickness of the first elastic member 2 after compression, then during battery pack assembly, the second elastic member 3 is not compressed and is disposed in the through hole 21. This allows one end of the second elastic member 3 to be connected to the end plate 1 along the first direction, and the second surface of the second elastic member 3 away from the end plate 1 to be recessed relative to the first surface of the first elastic member 2 away from the end plate 1. When the first elastic member 2 is compressed, the second surface can be flush with the first surface. In other words, when the cell 100 just begins to expand, the cell 100 does not contact the second elastic member 3, thus reserving sufficient expansion space for the cell 100. As the cell 100 further expands, the cell 100 contacts the second elastic member 3, and the rebound force of the second elastic member 3 prevents the cell 100 from continuing to expand, thereby improving the safety and cycle life of the cell 100.

[0062] Furthermore, if H3 is greater than the compressed thickness of the first elastic element 2 but less than or equal to 1.5H2, then during battery pack assembly, the second elastic element 3 is compressed and disposed within the through hole 21. That is, the first elastic element 2 and the second elastic element 3 simultaneously provide pre-tightening force to the battery cell 100, with the pre-tightening force on the battery cell 100 being greater. When the battery cell 100 just begins to expand, it simultaneously contacts the first elastic element 2 and the second elastic element 3, thus simultaneously preventing the expansion of the battery cell 100 through the rebound force of the first elastic element 2 and the second elastic element 3. Therefore, the resistance that the battery cell 100 needs to overcome during expansion is greater.

[0063] For example, end plate 1 is an injection-molded structural component. Further, the thickness of end plate 1 along the first direction is 3mm to 5mm, thereby providing a certain rigidity to the first and second elastic pads. For example, the thickness of end plate 1 along the first direction can be any value between 3mm and 5mm, such as 3mm, 3.5mm, 4mm, 4.5mm, or 5mm.

[0064] In some embodiments, the initial compression ratio of the first elastic member 2 ranges from 30% to 70%. It should be noted that when the end plate assembly is assembled with the battery pack, the cell 100 does not expand, and the first elastic member 2 is compressed and sandwiched between the cell 100 and the end plate 1. At this time, the compression ratio of the first elastic member 2 is the initial compression ratio. When the cell 100 expands during battery pack use, the first elastic member 2 can be further compressed under the squeezing force of the cell 100. If the initial compression ratio of the first elastic member 2 is too small, it cannot provide sufficient pre-tightening force to the cell 100, easily leading to excessive expansion space of the cell 100, making it difficult to meet the installation stability requirements; moreover, the first elastic member 2 occupies a large space, which is not conducive to improving the integration of the battery pack. If the initial compression ratio of the first elastic member 2 is too large, it will lead to excessive squeezing force on the cell 100, insufficient expansion space of the cell 100, and may even cause safety problems. By limiting the initial compression rate of the first elastic element 2 to a range of 30% to 70%, the expansion space, installation stability, and safety of the battery cell 100 can be balanced.

[0065] For example, the initial compression ratio of the first elastic element 2 can be any value between 30% and 70%, such as 30%, 40%, 50%, 60% or 70%.

[0066] In some embodiments, the rebound force of the first elastic element 2 when it undergoes elastic deformation ranges from 30 kPa to 300 kPa. If the rebound force of the first elastic element 2 when it undergoes elastic deformation is too small, it cannot provide sufficient preload to the battery cell 100, which can easily lead to an excessively large expansion space for the battery cell 100, making it difficult to meet the installation stability requirements. If the rebound force of the first elastic element 2 when it undergoes elastic deformation is too large, it can lead to excessive compressive force on the battery cell 100, resulting in an insufficient expansion space for the battery cell 100, and may even cause safety problems. By limiting the range of the rebound force of the first elastic element 2 when it undergoes elastic deformation to 30 kPa to 300 kPa, the expansion space, installation stability, and safety of the battery cell 100 can be balanced.

[0067] For example, the rebound force when the first elastic member 2 undergoes elastic deformation can be 30kPa, 50kPa, 100kPa, 150kPa, 200kPa, 250kPa or 300kPa, etc.

[0068] Specifically, during the assembly of the end plate assembly and the battery pack, the compressive force on the first elastic member 2 ranges from 30 kPa to 300 kPa, and the compression rate of the first elastic member 2 is 30% to 70%. In other words, under the compressive force of 30 kPa to 300 kPa, the compression rate of the first elastic member 2 is 30% to 70%, which can better balance the expansion space of the cell 100, installation stability and safety, as well as the integration of the battery pack.

[0069] In some embodiments, when the pressure applied to the second elastic member 3 is 0.7 MPa, the compression ratio of the second elastic member 3 is not less than 15%, thereby enabling the second elastic member 3 to provide sufficient rebound force to the battery cell 100 and also have greater compressibility when the battery cell 100 expands and comes into contact with the second elastic member 3, so as to improve the cycle life of the battery cell 100.

[0070] In some embodiments, the outline edge of the first elastic member 2 is flush with the outline edge of the end plate 1, thereby avoiding the first elastic member 2 from being exposed. This can improve the aesthetics on the one hand and avoid material waste on the other.

[0071] In some embodiments, along the first direction, the sum of the projected area of ​​the first elastic member 2 and the projected area of ​​the second elastic member 3 is equal to the projected area of ​​the end plate 1, thereby making the contact area between the battery cell 100 and the first elastic member 2 and the second elastic member 3 sufficiently large. This is beneficial to improving the uniformity of force on the battery cell 100, and also ensures that the first elastic member 2 and the second elastic member 3 provide sufficient rebound force to the battery cell 100, thereby improving the installation stability of the battery cell 100.

[0072] In this embodiment, the battery cell 100 has a cuboid structure. The end plate 1 has a rectangular structure. The first elastic pad has a U-shaped structure. The first elastic pad abuts against the large surface of the battery cell 100; the battery cell 100 includes multiple outer surfaces, among which the surface with the largest area is the large surface of the battery cell 100. The second elastic pad has a rectangular structure.

[0073] Furthermore, all four corners of the end plate 1 are rounded, which reduces the risk of damage to the battery cell 100 caused by collision between the end plate 1 and the battery cell 100.

[0074] In some embodiments, the end plate 1 is provided with a reinforcing structure on the side away from the first elastic member 2 along the first direction, which can improve the rigidity of the end plate 1, reduce the thickness and material usage of the end plate 1 along the first direction, improve the integration and lightweight design of the end plate assembly, and avoid interference with the first elastic member 2 and the second elastic member 3.

[0075] In some embodiments, the reinforcing structure includes a first protrusion 12 extending along a second direction; and / or, the reinforcing structure includes a second protrusion 13 extending along a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. This arrangement simplifies the structure and processing of the end plate 1 while ensuring that the stiffness of the end plate 1 meets the requirements, which is beneficial to reducing costs and improving the consistency of stiffness in different parts of the end plate 1.

[0076] In some embodiments, a plurality of first protrusions 12 are provided, and the plurality of first protrusions 12 are spaced apart along a third direction, thereby further improving the rigidity of the end plate 1 and the consistency of rigidity of different parts of the end plate 1.

[0077] In some embodiments, a plurality of second protrusions 13 are provided, and the plurality of second protrusions 13 are spaced apart along a second direction, thereby further improving the rigidity of the end plate 1 and the consistency of rigidity of different parts of the end plate 1.

[0078] This embodiment provides a vehicle including the aforementioned battery pack. The vehicle of this embodiment, by applying the aforementioned battery pack, possesses corresponding functions and beneficial effects, which will not be elaborated further here.

[0079] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An end plate assembly, characterized in that, include: End plate; A first elastic element is provided along a first direction and is sandwiched between the end plate and the battery cell. The first elastic element is configured to provide a preload force to the battery cell. The first elastic element has a through hole that extends along the first direction. The second elastic element is disposed within the through hole.

2. The endplate assembly according to claim 1, characterized in that, Along the first direction, one end of the second elastic member is connected to the end plate, and the second surface of the second elastic member away from the end plate is recessed relative to the first surface of the first elastic member away from the end plate; when the first elastic member is compressed, the second surface can be flush with the first surface.

3. The endplate assembly according to claim 1 or 2, characterized in that, Along the first direction, the thickness of the battery cell is H1, the thickness of the first elastic member when it is not compressed is H2, and the thickness of the second elastic member when it is not compressed is H3; 0mm < H2 ≤ 0.1H1; and / or, 0mm < H3 ≤ 1.5H2.

4. The endplate assembly according to any one of claims 1-3, characterized in that, The initial compression ratio of the first elastic element ranges from 30% to 70%. And / or, the range of the rebound force when the first elastic element undergoes elastic deformation is 30kPa to 300kPa; And / or, when the pressure applied to the second elastic element is 0.7 MPa, the compression ratio of the second elastic element is not less than 15%.

5. The endplate assembly according to any one of claims 1-4, characterized in that, The first elastic element is a first elastic pad; And / or, the second elastic element is a second elastic pad.

6. The endplate assembly according to claim 5, characterized in that, The contour edge of the first elastic element is flush with the contour edge of the end plate.

7. The endplate assembly according to claim 5, characterized in that, Along the first direction, the sum of the projected area of ​​the first elastic element and the projected area of ​​the second elastic element is equal to the projected area of ​​the end plate.

8. The endplate assembly according to any one of claims 1-7, characterized in that, The end plate has a reinforcing structure on the side opposite to the first elastic member along the first direction.

9. The end plate assembly according to claim 8, characterized in that, The reinforcing structure includes a first protrusion extending along a second direction; And / or, the reinforcing structure includes a second protrusion extending along a third direction; The first direction, the second direction, and the third direction are perpendicular to each other.

10. A battery packaging mechanism, characterized in that, Includes the endplate assembly as described in any one of claims 1-9.

11. The battery packaging mechanism according to claim 10, characterized in that, At least two of the battery cells are stacked along the first direction to form a battery pack; two end plate assemblies are provided, and the two end plate assemblies are respectively located at both ends of the battery pack along the first direction.

12. The battery packaging mechanism according to claim 10 or 11, characterized in that, It also includes a support structure, wherein the end plate abuts against the support structure on the side opposite to the battery cell along the first direction.

13. The battery packaging mechanism according to claim 12, characterized in that, The end plate is provided with a guide portion on the side facing the support structure along the first direction, and the guide portion can guide the end plate to be inserted between the support structure and the battery cell.

14. The battery packaging mechanism according to claim 12, characterized in that, It also includes a housing, which includes an installation space for accommodating the battery cells, and the support structure is provided within the installation space.

15. A battery pack, characterized in that, It includes the endplate assembly as described in any one of claims 1-9, or the battery encapsulation mechanism as described in any one of claims 10-14.

16. A vehicle, characterized in that, It includes the endplate assembly as described in any one of claims 1-9, or the battery packaging mechanism as described in any one of claims 10-14, or the battery pack as described in claim 15.

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