Battery cell shell and battery

Abstract

The utility model discloses a battery cell shell and battery, the battery cell shell comprises: a body, a support piece, a cushion layer and a battery cell, the body is provided with side plates and end plates, and the body defines an accommodating cavity; the supporting piece is arranged in the containing cavity and fixedly connected with the side plate. The cushion layer is connected with the supporting piece, the cushion layer and the side plate are oppositely arranged at an interval, and the supporting piece is suitable for pushing the cushion layer to move towards the end plate so that the end of the cushion layer can abut against the connecting position of the side plate and the end plate; the battery cell is arranged in the battery cell shell, and the battery cell is propped against the cushion layer. Therefore, when the battery cell shell is subjected to pressure or suction force which enables the battery cell shell to sink inwards, the supporting piece can push the cushion layer to move towards the end plate, so that the end part of the cushion layer pushes against the connecting position of the end plate and the side plate to provide reverse supporting force for the connecting position of the end plate and the side plate, and the pressure or suction force which enables the battery cell shell to sink inwards and is applied to the battery cell shell can be counteracted; and the battery cell shell is effectively supported, so that the battery cell shell is prevented from being sunken and deformed, the subsequent smooth assembly is ensured, and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core shell and a battery. Background Art

[0002] During the battery filling process or when the battery shell is under pressure, the shell is prone to denting, which will affect subsequent installation and has poor safety performance, and will also cause battery performance to deteriorate. To avoid shell denting and deformation, the shell thickness is usually increased to improve the pressure resistance of the shell structure, but increasing the shell thickness reduces the energy density of the battery. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cell shell, which can solve the problem of battery cell shell depression by arranging a support member and a cushion layer inside the battery cell shell.

[0004] The utility model further provides a battery using the battery cell shell.

[0005] The battery cell shell according to the embodiment of the utility model includes: a main body, a support member, a cushion layer and a battery cell, wherein the main body has a side plate and an end plate, and the main body defines a accommodating cavity; the support member is arranged in the accommodating cavity, and the support member is fixedly connected to the side plate; the cushion layer is connected to the support member, and the cushion layer is spaced and relatively arranged to the side plate, and the support member is suitable for pushing the cushion layer toward the end plate so that the end of the cushion layer pushes against the connection position between the side plate and the end plate; the battery cell is arranged in the battery cell shell, and the battery cell abuts against the cushion layer.

[0006] The battery cell shell according to the embodiment of the utility model is provided with a support member and a cushion layer in the body so that when the battery cell shell is subjected to pressure or suction that causes it to be concave inward, the support member can push the cushion layer to move toward the end plate, so that the end of the cushion layer pushes against the connection position between the end plate and the side plate, so as to provide a reverse support force for the connection position between the end plate and the side plate, which can offset the pressure or suction that causes the battery cell shell to be concave inward, can effectively support the battery cell shell, avoid the battery cell shell from being concave and deformed, ensure that it can be assembled smoothly afterwards, improve the safety of use, and achieve lightweight and improved energy density compared with the prior art.

[0007] In some embodiments, the distance between the cushion layer and the side plate gradually decreases from the center of the cushion layer toward its two ends. In this way, the support member can push the cushion layer while ensuring the supporting performance of the cushion layer, so that the end of the cushion layer can move to the connection between the end plate and the side plate to achieve the limited support of the cushion layer on the battery cell housing. The cushion layer is set as an arc structure, which has a simple structure and is easy to achieve the movement of the end of the cushion layer.

[0008] Specifically, two support members are arranged between the cushion layer and the side plate, and the two support members are arranged at intervals along the length direction of the side plate, and the distance between adjacent support members is greater than or equal to the distance between each support member and the end plate. In this way, the support member can push the cushion layer to a position close to the end, so that the cushion layer can quickly push against the connection position between the end plate and the side plate, thereby improving the support efficiency.

[0009] In some embodiments, the support member is constructed as a cylindrical structure, so that the force on the support member is more concentrated, and it is suitable for when the battery cell shell is subjected to a large pressure or suction that causes it to sink inward. The support member has a greater pushing force on the cushion layer, and can quickly push the cushion layer so that the two ends of the cushion layer are quickly pushed against the connection between the end plate and the side plate, and can quickly and effectively support the battery cell shell to prevent it from sinking.

[0010] Specifically, the length L1 of the cushion layer and the length L2 of the side plate satisfy: 1.1L2≤L1≤1.5L2. In this way, the cushion layer can be moved to push against the connection position between the end plate and the side plate while reducing the material consumption, thereby supporting the battery cell housing and preventing the battery cell housing from being sunken and deformed.

[0011] Furthermore, the projection area S1 of the cushion layer relative to the side plate and the area S2 of the side plate satisfy: 0.7S2≤S1≤0.8S2. In this way, the cushion layer can be pushed against the connection position between the end plate and the side plate to achieve the supporting and limiting effect on the battery cell housing under the premise of reducing the material consumption, and can save materials and reduce costs.

[0012] In some embodiments, the support member is configured as a circular ring structure. Thus, when the battery cell housing is subjected to pressure or suction that causes it to be recessed inward, the support member is slightly deformed, which can buffer a portion of the force, can effectively buffer, and further prevent the battery cell housing from being deformed.

[0013] Specifically, the length L3 of the cushion layer and the length L2 of the side plate satisfy: 1.15L2≤L3≤1.2L2. This ensures that the cushion layer end can move a short distance to push against the connection position between the end plate and the side plate. By keeping the cushion layer length within this range, the cushion layer can effectively support the battery cell housing and reduce the material consumption.

[0014] Furthermore, the projection area S3 of the cushion layer relative to the side plate and the area S2 of the side plate satisfy: 0.8S2≤S3≤0.85S2. In this way, the cushion layer end can move a short distance to push against the connection position between the end plate and the side plate, thereby improving efficiency and being able to support the battery cell housing in a timely manner.

[0015] The battery according to the embodiment of the utility model comprises the battery cell housing and the battery cell described in the above embodiment, wherein the battery cell is arranged in the battery cell housing, and the battery cell abuts against the cushion layer. In this way, the volume inside the battery cell housing can be reduced, thereby reducing the area of ​​the electrolyte flow channel, and during the injection process, the electrolyte is more concentrated to increase the electrolyte level, reduce the injection time, improve the injection efficiency, increase the contact between the battery cell and the electrolyte, strengthen the electrolyte infiltration effect, and improve the electrolyte absorption effect.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of the cushion layer when the battery cell housing is not subjected to pressure that causes it to be recessed inward according to an embodiment of the utility model;

[0019] Figure 2 is a schematic diagram of the cushion layer when the battery cell housing is subjected to pressure that causes it to be concave inward according to an embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of a battery cell casing according to an embodiment of the utility model.

[0021] Reference numerals:

[0022] Battery cell housing 100, battery cell 200,

[0023] Main body 10, side plate 11, end plate 12,

[0024] Cushion layer 20 and support member 30 . DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] Reference below Figure 1-Figure 3 The battery cell housing 100 and the battery according to the embodiment of the utility model are described. Figure 1 and Figure 2 It is a cross-sectional view of the battery cell casing 100 along the vertical direction.

[0027] like Figure 1-Figure 3 As shown, the battery cell casing 100 according to the embodiment of the present invention includes: a body 10 , a support member 30 , a cushion layer 20 and a battery cell 200 .

[0028] Among them, the main body 10 has a side plate 11 and an end plate 12, and the main body 10 defines a accommodating cavity; the support member 30 is arranged in the accommodating cavity, and the support member 30 is fixedly connected to the side plate 11; the cushion layer 20 is connected to the support member 30, and the cushion layer 20 and the side plate 11 are spaced and arranged opposite to each other, and the support member 30 is suitable for pushing the cushion layer 20 to move toward the end plate 12 so that the end of the cushion layer 20 is pushed against the connection position between the side plate 11 and the end plate 12.

[0029] Specifically, the main body 10 has two side panels 11 and two end panels 12, and the two end panels 12 are respectively connected to the two ends of the side panels 11 in the length direction. The two side panels 11 are the large surfaces of the shell, and the two end panels 12 are the top and bottom surfaces of the shell. The main body 10 is a rectangular structure, and its interior is hollow to form a accommodating cavity, in which a support member 30 and a cushion layer 20 are arranged. Two cushion layers 20 are arranged, and each cushion layer 20 is respectively opposite to a side panel 11, and extends along the length direction of the side panel 11. There is a gap between the cushion layer 20 and the side panel 11, and the cushion layer 20 is connected to the side panel 11 through the support member 30, that is, the cushion layer 20 is arranged on the large surface of the shell through the support member 30, and the end of the support member 30 close to the side panel 11 is connected to the side panel 11, and the end of the support member 30 away from the side panel 11 is connected to the side of the cushion layer 20 close to the side panel 11.

[0030] It should be noted that when the cell housing 100 is not subjected to pressure or suction that causes it to be recessed inward, the support member 30 only serves to connect the cushion layer 20 and the side plate 11, and does not push the cushion layer 20 to move. Figure 1 Schematic diagram of the support member 30 not pushing the cushion layer 20, the distance between the end of the cushion layer 20 and the side plate 11 is a preset distance, and there is a gap between the end of the cushion layer 20 and the end plate 12, wherein the end of the cushion layer 20 is the two ends of its length direction; if the battery cell housing 100 is subjected to pressure or suction that causes it to be concave inward, the support member 30 transfers the force exerted on the battery cell housing 100 to the cushion layer 20, which pushes the connection between it and the cushion layer 20, so that the area from the connection to the end of the cushion layer 20 moves toward the end plate 12, so that the end of the cushion layer 20 is pushed against the connection position between the end plate 12 and the side plate 11, Figure 2 This is a schematic diagram showing that the support member 30 pushes the cushion layer 20 so that the end of the cushion layer 20 abuts against the connection position between the end plate 12 and the side plate 11 .

[0031] In addition, when the battery cell housing 100 is subjected to pressure or suction that causes it to sink inward, the projected area of ​​the cushion layer 20 relative to the side plate 11 is larger than the projected area of ​​the cushion layer 20 relative to the side plate 11 when the battery cell housing 100 is not subjected to pressure or suction that causes it to sink inward, and the end of the cushion layer 20 pushes against the connection position between the end plate 12 and the side plate 11, which provides a reverse force on the battery cell housing 100 to offset the pressure or suction that causes the battery cell housing 100 to sink inward. The cushion layer 20 can effectively support the battery cell housing 100 to prevent the battery cell housing 100 from sinking.

[0032] According to the battery cell shell 100 of the embodiment of the utility model, by arranging the support member 30 and the cushion layer 20 in the main body 10, when the battery cell shell 100 is subjected to pressure or suction that makes it concave inward, the support member 30 can push the cushion layer 20 to move toward the end plate 12, so that the end of the cushion layer 20 pushes against the connection position between the end plate 12 and the side plate 11, so as to provide a reverse support force for the connection position between the end plate 12 and the side plate 11, which can offset the pressure or suction that makes the battery cell shell 100 concave inward, can effectively support the battery cell shell 100, avoid the battery cell shell 100 from being concave and deformed, ensure that it can be assembled smoothly later, improve the safety of use, and achieve lightweight and improved energy density compared with the prior art.

[0033] like Figure 1-Figure 3 As shown, in some embodiments, the distance between the cushion layer 20 and the side plate 11 gradually decreases from the center of the cushion layer 20 toward both ends thereof.

[0034] Specifically, the cushion layer 20 is constructed as an arc-shaped structure, which is concave relative to the side plate 11, and the distances between different parts of the cushion layer 20 and the side plate 11 are different. For example, the center position of the cushion layer 20 is at the largest distance from the side plate 11, and the distances between the two ends of the cushion layer 20 and the side plate 11 are the smallest. The distance between the cushion layer 20 and the side plate 11 gradually decreases from the center toward the two ends. The cushion layer 20 can be made of elastic steel material, so that the support member 30 can push the cushion layer 20 while ensuring the supporting performance of the cushion layer 20, so that the end of the cushion layer 20 can move to the connection between the end plate 12 and the side plate 11, so as to realize the limited support of the cushion layer 20 on the battery cell housing 100. The cushion layer 20 is set to an arc-shaped structure, which has a simple structure and is easy to realize the movement of the end of the cushion layer 20.

[0035] Specifically, two support members 30 are disposed between the cushion layer 20 and the side plate 11 . The two support members 30 are spaced apart along the length direction of the side plate 11 , and the distance between adjacent support members 30 is greater than or equal to the distance between each support member 30 and the end plate 12 .

[0036] It should be noted that two support members 30 are arranged between the cushion layer 20 and the side plate 11, and the distance between the two support members 30 may be equal to the distance between each support member 30 and its adjacent end plate 12, that is, the two support members 30 divide the side plate 11 into three equal parts, and the distance from the connection between each support member 30 and the cushion layer 20 to the end of the cushion layer 20 is equal; the distance between the two support members 30 is greater than the distance between each support member 30 and its adjacent end plate 12, and the distance from the connection between each support member 30 and the cushion layer 20 to the end of the cushion layer 20 is equal, so that the support member 30 can push the cushion layer 20 to a position close to the end, so that the cushion layer 20 can be quickly pushed against the connection position between the end plate 12 and the side plate 11, thereby improving the support efficiency.

[0037] In some embodiments, the support member 30 is constructed as a cylindrical structure. Its two end surfaces are connected to the side plate 11 and the cushion layer 20 respectively. The support member 30 is constructed as a cylinder, and its force is more concentrated. The cylindrical support member 30 is suitable for when the battery cell housing 100 is subjected to a large pressure or suction force that causes it to sag inward. The support member 30 has a greater pushing force on the cushion layer 20, and can quickly push the cushion layer 20, so that the two ends of the cushion layer 20 are quickly pushed against the connection between the end plate 12 and the side plate 11, and can quickly and effectively support the battery cell housing 100 to prevent it from sag.

[0038] Specifically, the length L1 of the cushion layer 20 and the length L2 of the side plate 11 satisfy: 1.1L2≤L1≤1.5L2.

[0039] It should be noted that the cushion layer 20 is an arc-shaped structure. To ensure that both ends of the cushion layer 20 can move to the connection between the end plate 12 and the side plate 11, the length of the cushion layer 20 is set to be greater than the length of the side plate 11. When the support member 30 is a cylindrical structure, the length of the cushion layer 20 is 1.1 to 1.5 times the length of the side plate 11. Within this range, it is possible to ensure that the cushion layer 20 can move to push against the connection position between the end plate 12 and the side plate 11 while reducing material usage, thereby supporting the battery cell housing 100 and preventing the battery cell housing 100 from being concave and deformed.

[0040] If the length of the cushion layer 20 is less than 1.1 times the length of the side plate 11, the cushion layer 20 is too short and cannot push against the connection between the end plate 12 and the side plate 11 after moving, and cannot effectively support the battery cell housing 100; if the length of the cushion layer 20 is greater than 1.5 times the length of the side plate 11, the cushion layer 20 is too long and although the cushion layer 20 can effectively support the battery cell housing 100, the excessive material used will increase the cost.

[0041] Furthermore, the projection area S1 of the cushion layer 20 relative to the side plate 11 and the area S2 of the side plate 11 satisfy: 0.7S2≤S1≤0.8S2.

[0042] Specifically, when the cell housing 100 is not subjected to pressure or suction that causes it to be concave inward, that is, when the cushion layer 20 is not pushed, the projection area of ​​the cushion layer 20 relative to the side plate 11 is 70% to 80% of the area of ​​the side plate 11. Within this range, it is possible to ensure that the cushion layer 20 can push against the connection position between the end plate 12 and the side plate 11 while reducing the material consumption, so as to achieve the supporting and limiting effect on the cell housing 100, save materials and reduce costs.

[0043] If the projection area of ​​the cushion layer 20 relative to the side plate 11 is less than 70% of the area of ​​the side plate 11, the area of ​​the cushion layer 20 is relatively small. After the support member 30 pushes the cushion layer 20, the end of the cushion layer 20 cannot be pushed against the connection position between the end plate 12 and the side plate 11, and the battery cell housing 100 cannot be effectively supported, and the battery cell housing 100 cannot be effectively prevented from being sunken and deformed. If the projection area of ​​the cushion layer 20 relative to the side plate 11 is greater than 80% of the area of ​​the side plate 11, the area of ​​the cushion layer 20 is relatively large, which is not conducive to saving materials.

[0044] In some embodiments, the support member 30 is configured as a circular ring structure. One side of the circular end face is connected to the inner wall of the side plate 11, and the other side of the circular end face is connected to the side of the cushion layer 20 close to the side plate 11. The support member 30 is configured as a circular ring and can be made of hard rubber material. When the battery cell housing 100 is subjected to pressure or suction that causes it to be concave inward, the support member 30 is slightly deformed, which can buffer part of the force, can effectively buffer, and further prevent the battery cell housing 100 from being deformed.

[0045] In addition, the diameter D1 of the support member 30 and the height H1 of the side plate 11 satisfy: 1 / 3H1≤D1≤1 / 2H1, and the diameter D1 of the support member 30 and the width W1 of the side plate 11 satisfy: 1 / 2W1≤D1≤2 / 3W1.

[0046] Specifically, the length L3 of the cushion layer 20 and the length L2 of the side plate 11 satisfy: 1.15L2≤L3≤1.2L2.

[0047] It should be noted that the supporting member 30 has different structures and has different pushing effects on the cushion layer 20. Accordingly, the cushion layer 20 can be set to different lengths. For example, if the pushing force of the supporting member 30 is large, the length of the cushion layer 20 can be reduced while ensuring that the cushion layer 20 can support the battery cell housing 100; if the pushing force of the supporting member 30 is small, the length of the cushion layer 20 can be increased so that it can be quickly pushed against the battery cell housing 100.

[0048] Specifically, when the support member 30 is a circular ring structure, the length of the cushion layer 20 is greater than the length of the cushion layer 20 when the support member 30 is a cylindrical structure. This ensures that the end of the cushion layer 20 can move a shorter distance to push against the connection position between the end plate 12 and the side plate 11. The length of the cushion layer 20 is 1.15 to 1.2 times the length of the side plate 11. Within this range, it can ensure that the cushion layer 20 effectively supports the battery cell housing 100 and can reduce material usage.

[0049] If the length of the cushion layer 20 is less than 1.15 times the length of the side panel 11, the cushion layer 20 is too short and cannot provide effective support; if the length of the cushion layer 20 is greater than 1.2 times the length of the side panel 11, the cushion layer 20 is too long and uses more material, which will cause unnecessary waste.

[0050] Furthermore, a projection area S3 of the cushion layer 20 relative to the side plate 11 and an area S2 of the side plate 11 satisfy: 0.8S2≤S3≤0.85S2.

[0051] It should be noted that the supporting member 30 has different structures and has different pushing effects on the cushion layer 20. Accordingly, the cushion layer 20 can be set to different sizes. For example, if the pushing force of the supporting member 30 is relatively large, the area of ​​the cushion layer 20 can be reduced while ensuring that the cushion layer 20 can support the battery cell housing 100; if the pushing force of the supporting member 30 is relatively small, the area of ​​the cushion layer 20 can be increased to enable it to quickly push against the battery cell housing 100.

[0052] Specifically, the support member 30 is constructed in a circular shape, which pushes the cushion layer 20 stably and smoothly. When the cushion layer 20 is not pushed, the projection area of ​​the cushion layer 20 relative to the side plate 11 is 80% to 85% of the area of ​​the side plate 11. The area of ​​the cushion layer 20 is large and its length is long. The support member 30 pushes the cushion layer 20, which can make the end of the cushion layer 20 move a short distance to push against the connection position between the end plate 12 and the side plate 11, thereby improving efficiency and being able to support the battery cell housing 100 in time.

[0053] If the projected area of ​​the cushion layer 20 relative to the side plate 11 is less than 80% of the area of ​​the side plate 11, it takes a long time for the end of the cushion layer 20 to move to the connection position between the end plate 12 and the side plate 11, and it cannot be ensured that the cushion layer 20 can support the battery cell housing 100 in time; if the projected area of ​​the cushion layer 20 relative to the side plate 11 is greater than 85% of the area of ​​the side plate 11, the area of ​​the cushion layer 20 is larger, and more materials are used, which increases the cost.

[0054] The battery according to the embodiment of the present invention includes a battery cell housing 100 and a battery cell 200 . The battery cell 200 is disposed in the battery cell housing 100 , and the battery cell 200 abuts against the cushion layer 20 .

[0055] Specifically, two opposite cushion layers 20 are arranged in the accommodating cavity, each cushion layer 20 is concave relative to the side plate 11 to which it is connected, the battery cell 200 is arranged between the two cushion layers 20, and is extended along the length direction of the side plate 11, the top cover of the battery cell 200 is fitted with the end plate 12, the battery cell 200 is abutted against the cushion layer 20, and the cushion layer 20 is moved to fix its end at the connection position between the side plate 11 and the end plate 12.

[0056] It should be noted that setting the cushion layer 20 as an inwardly concave arc structure can reduce the volume inside the battery cell housing 100, thereby reducing the area of ​​the electrolyte flow channel. During the injection process, the electrolyte is made more concentrated to increase the electrolyte level, reduce the injection time, and improve the injection efficiency. It can increase the contact between the battery cell 200 and the electrolyte, strengthen the wetting effect of the electrolyte, and improve the electrolyte absorption effect.

[0057] In the description of the present invention, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0059] In the description of the present invention, "plurality" means two or more.

[0060] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0061] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0063] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cell casing, characterized in that: include: A body (10), the body (10) having a side plate (11) and an end plate (12), and the body (10) defines a receiving cavity; A support member (30), wherein the support member (30) is disposed in the accommodating cavity, and the support member (30) is fixedly connected to the side plate (11); a cushion layer (20), the cushion layer (20) being connected to the support member (30), the cushion layer (20) being spaced apart from and arranged opposite to the side plate (11), the support member (30) being adapted to push the cushion layer (20) toward the end plate (12) so that an end portion of the cushion layer (20) is pushed against a connection position between the side plate (11) and the end plate (12); A battery core (200), wherein the battery core (200) is arranged in the battery core shell (100), and the battery core (200) is in contact with the cushion layer (20).

2. The battery cell casing according to claim 1, characterized in that: The distance between the cushion layer (20) and the side plate (11) gradually decreases from the center of the cushion layer (20) toward both ends thereof.

3. The battery cell casing according to claim 1, characterized in that: Two support members (30) are arranged between the cushion layer (20) and the side plate (11), and the two support members (30) are arranged at intervals along the length direction of the side plate (11), and the distance between adjacent support members (30) is greater than or equal to the distance between each support member (30) and the end plate (12).

4. The battery cell casing according to claim 3, characterized in that: The support member (30) is configured as a cylindrical structure.

5. The battery cell casing according to claim 4, characterized in that: The length L1 of the cushion layer (20) and the length L2 of the side plate (11) satisfy the following relationship: 1.1L2≤L1≤1.5L2.

6. The battery cell casing according to claim 4, characterized in that: The projection area S1 of the cushion layer (20) relative to the side plate (11) and the area S2 of the side plate (11) satisfy: 0.7S2≤S1≤0.8S2.

7. The battery cell casing according to claim 3, characterized in that: The support member (30) is configured as a circular ring structure.

8. The battery cell casing according to claim 7, characterized in that: The length L3 of the cushion layer (20) and the length L2 of the side plate (11) satisfy the following relationship: 1.15L2≤L3≤1.2L2.

9. The battery cell casing according to claim 7, characterized in that: The projection area S3 of the cushion layer (20) relative to the side plate (11) and the area S2 of the side plate (11) satisfy the following relationship: 0.8S2≤S3≤0.85S2.

10. A battery, characterized in that: include: The battery cell casing (100) according to any one of claims 1 to 9.

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