A buffer structure and a battery module

Abstract

The application discloses a buffering structure and a battery module, and belongs to the technical field of batteries. The buffering structure comprises a first buffering piece and a second buffering piece, and the first buffering piece and the second buffering piece can be processed separately. The first buffering piece comprises a first connecting part, and the second buffering piece comprises a second connecting part. The second connecting part is detachably connected with the first connecting part, so that the first buffering piece and the second buffering piece are connected and enclose a buffering cavity. The first buffering piece and the second buffering piece jointly provide omnibearing buffering, heat insulation and insulation protection for the battery cell. That is, compared with a traditional integrated stamping forming process, the detachable design avoids the waste of a large amount of materials being cut off. The first buffering piece and the second buffering piece can be flexibly assembled according to actual requirements, production waste is effectively reduced, and production cost is reduced.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a buffer structure and a battery module. Background Technology

[0002] Within the battery module, buffer pads need to be installed between adjacent cells to buffer the expansion stress of the cells during charging and discharging, preventing the cells from deforming or short-circuiting due to compression; at the same time, they can absorb vibration energy, reduce the damage to the cells caused by mechanical impacts from road conditions, and ensure the stability and safety of the battery module structure.

[0003] Currently, the one-piece stamping process commonly used for cushioning pads is limited by the process characteristics and the structure of the cushioning pads, resulting in a lot of waste during the production process. This not only causes material waste but also increases production costs to some extent. Utility Model Content

[0004] The purpose of this utility model is to provide a buffer structure to solve the technical problem of material waste caused by the existing buffer pad processing method; another purpose of this application is to provide a battery module.

[0005] Technical solution: This application provides a buffer structure, including:

[0006] The first buffer component includes a first connecting portion;

[0007] The second buffer includes a second connecting portion, which is detachably connected to the first connecting portion, so that the first buffer and the second buffer are connected and form a buffer cavity.

[0008] In some embodiments, the first buffer further includes a first buffer body, which is connected to the first connecting portion; a first protrusion is provided on one side of the first connecting portion;

[0009] The second buffer also includes a second buffer body, which is connected to the second connecting portion; the second buffer has a first groove that extends through the second connecting portion along the thickness direction of the second buffer.

[0010] The first protrusion is embedded in the first groove so that the second buffer is detachably connected to the first buffer.

[0011] In some embodiments, the maximum dimension of the side of the first protrusion away from the first connecting portion is greater than the dimension of the side of the first protrusion close to the first connecting portion;

[0012] The maximum diameter of the first groove is greater than the size of the opening of the first groove.

[0013] In some embodiments, the buffer structure includes a plurality of first buffers and a plurality of second buffers, which are arranged alternately and connected end to end to form the buffer cavity.

[0014] In some embodiments, the first buffer member has two first connecting portions disposed opposite each other, the two first connecting portions being disposed on both sides of the length direction of the first buffer body, and each first connecting portion having a first protrusion protruding on the side away from the first buffer body.

[0015] The second buffer has two opposing second connecting portions, each of which has the first groove, and the opening of each first groove is located on the side of the corresponding second connecting portion that is close to the first connecting portion.

[0016] In some embodiments, the first buffer member has two first connecting portions disposed opposite each other, the two first connecting portions being disposed on both sides of the length direction of the first buffer body, and each first connecting portion having a first protrusion protruding on the side facing the buffer cavity.

[0017] The second buffer has two opposing second connecting portions, each of which has the first groove, the opening of which is located on the side of the second connecting portion away from the second buffer body.

[0018] In some embodiments, the second buffer further includes a fourth connecting portion, which is connected to the side of the second buffer body away from the second connecting portion; a second protrusion is provided on one side of the fourth connecting portion.

[0019] The first buffer also includes a third connecting portion, which is connected to the side of the first buffer body away from the first connecting portion; the first buffer has a second groove, which extends through the third connecting portion in the thickness direction of the first buffer.

[0020] The second protrusion is embedded in the second groove so that the third connecting part and the fourth connecting part can be detachably connected.

[0021] In some embodiments, the first protrusion protrudes from the side of the first connecting portion away from the first buffer body; the groove of the second recess is located on the side of the third connecting portion facing the fourth connecting portion.

[0022] The opening of the first groove is located on the side of the second connecting part facing the buffer cavity; the second protrusion protrudes from the side of the fourth connecting part away from the second buffer body.

[0023] In some embodiments, the first protrusion protrudes from the side of the first connecting portion facing the buffer cavity; the groove of the second recess is located on the side of the third connecting portion away from the first buffer body;

[0024] The opening of the first groove is located on the side of the second connecting part away from the second buffer body; the second protrusion protrudes from the side of the second connecting part facing the buffer cavity.

[0025] Accordingly, this application also provides a battery module, including a plurality of buffer structures as described in any one of the above embodiments, wherein the buffer structure further includes:

[0026] Multiple battery cells are arranged sequentially at intervals along the thickness direction of the buffer structure, and the buffer structure is provided between two adjacent battery cells, with the buffer structure in contact with the two adjacent battery cells.

[0027] Beneficial Effects: Compared with the prior art, the buffer structure provided in this application includes a first buffer component and a second buffer component, both of which can be processed independently. The first buffer component includes a first connecting portion, and the second buffer component includes a second connecting portion. The second connecting portion is detachably connected to the first connecting portion, allowing the first and second buffer components to connect and form a buffer cavity. The first and second buffer components are spaced between adjacent battery cells, providing buffering, heat insulation, and electrical protection for the battery cells. In other words, this split, detachable design avoids the waste of large amounts of material compared to traditional one-piece stamping processes. The first and second buffer components can be flexibly assembled according to actual needs, effectively reducing production waste and lowering production costs. Attached Figure Description

[0028] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0029] Figure 1 A schematic diagram of the overall structure of the buffer structure provided in Embodiment 1 of this application;

[0030] Figure 2 An exploded view of the buffer structure of Embodiment 1 provided in this application;

[0031] Figure 3 Another exploded view of the buffer structure of Embodiment 1 provided in this application;

[0032] Figure 4 A schematic diagram of the overall structure of the buffer structure in Embodiment 2 provided in this application;

[0033] Figure 5 An exploded view of the buffer structure of Embodiment 2 provided in this application;

[0034] Figure 6 Another exploded view of the buffer structure of Embodiment 2 provided in this application;

[0035] Figure 7 A schematic diagram of the overall structure of the buffer structure in Embodiment 3 provided in this application;

[0036] Figure 8 An exploded view of the buffer structure of Embodiment 3 provided in this application;

[0037] Figure 9 Another exploded view of the buffer structure of Embodiment 3 provided in this application;

[0038] Figure 10 This is a schematic diagram of the structure of the battery module provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100 - First buffer component; 110 - First connecting part; 111 - First protrusion; 120 - First buffer body; 130 - Third connecting part; 131 - Second groove; 140 - Fifth connecting part; 141 - Third groove;

[0041] 200 - Second buffer; 210 - Second connecting part; 211 - First groove; 220 - Second buffer body; 230 - Fourth connecting part; 231 - Second protrusion; 240 - Sixth connecting part; 241 - Third protrusion;

[0042] 300-Buffer Chamber;

[0043] 410 - Buffer structure; 420 - Battery cell. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two elements or an interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. Furthermore, although the terms "first," "second," etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this application. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.

[0046] In the description of this application, "multiple" means two or more, and "at least one" means one, two, or more, unless otherwise explicitly specified. In the description of this application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, an angle of 80° to 100° is considered perpendicular. Similarly, "parallel" means completely parallel or almost completely parallel, for example, a completely parallel angle of 10° is considered parallel.

[0047] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0048] Within the battery module, buffer pads need to be installed between adjacent cells to buffer the expansion stress of the cells during charging and discharging, preventing the cells from deforming or short-circuiting due to compression; at the same time, they can absorb vibration energy, reduce the damage to the cells caused by mechanical impacts from road conditions, and ensure the stability and safety of the battery module structure.

[0049] The main functions of the buffer pads between battery cells are: buffering: the buffer pads can absorb the expansion and contraction of the battery cells during charging and discharging, reducing the risk of cell bulging and thus extending the battery's lifespan; heat insulation: the buffer pads isolate heat transfer between batteries, preventing the battery temperature from becoming too high and reducing the risk of battery bulging; insulation: they have good insulation properties, preventing short circuits between batteries and reducing the risk of battery damage; shock absorption and noise reduction: the buffer pads can reduce the damage to the battery cells caused by vibration and impact, effectively extending battery life.

[0050] Currently, the one-piece stamping process commonly used for cushioning pads is limited by the process characteristics and the structure of the cushioning pads, resulting in a lot of waste during the production process. This not only causes material waste but also increases production costs to some extent.

[0051] In view of this, embodiments of this application provide a buffer structure to solve at least part of the above-mentioned technical problems.

[0052] Please see Figure 1 Currently, in technology, the buffer pad is a U-shaped frame, formed by a one-piece stamping process. The material in the middle of the U-shaped frame is cut off and cannot be reused, resulting in excessive waste and high production costs. To solve this problem, this embodiment provides a buffer structure 410, including a first buffer 100 and a second buffer 200, both of which can be processed individually. The first buffer 100 includes a first connecting portion 110, and the second buffer 200 includes a second connecting portion 210. The second connecting portion 210 is detachably connected to the first connecting portion 110, allowing the first buffer 100 and the second buffer 200 to connect and form a buffer cavity 300. The first buffer 100 and the second buffer 200 are spaced between adjacent battery cells, providing buffering, heat insulation, and insulation protection for the battery cell 420. In other words, this split and detachable design avoids the waste of a large amount of material by cutting it off compared to the traditional one-piece stamping process. The first buffer 100 and the second buffer 200 can be flexibly assembled according to actual needs, effectively reducing production waste and lowering production costs.

[0053] In some examples, the first buffer 100 and the second buffer 200 can be manufactured using materials such as silicone pads, polyethylene foam pads, polyurethane foam pads, or PE pads, depending on the actual working conditions and performance requirements. These materials can effectively absorb the expansion stress during the charging and discharging process of the battery cell 420, buffer external mechanical impacts, and have good heat insulation and insulation properties, which can reduce the risk of battery cell 420 bulging and prevent short circuits. In addition, after these materials are individually processed into the first buffer 100 and the second buffer 200, they are combined through the detachable connection of the first connecting part 110 and the second connecting part 210. This not only continues their respective performance advantages and provides all-round protection for the battery cell 420, but also avoids the material waste problem of traditional one-piece stamping due to the split design. This achieves dual optimization of performance improvement and cost control, and can flexibly adapt to the needs of battery modules of different specifications and different usage scenarios.

[0054] In some embodiments, please refer to Figure 1 and Figure 2 To further illustrate the specific structure for connecting the first connecting portion 110 and the second connecting portion 210, the first buffer member 100 also includes a first buffer body 120, which is connected to the first connecting portion 110. The first connecting portion 110 is disposed on the edge of the first buffer body 120. A first protrusion 111 is provided on one side of the first connecting portion 110; specifically, the first protrusion 111 is convex and protrudes vertically from one side surface of the first connecting portion 110.

[0055] The second buffer member 200 further includes a second buffer body 220, which is connected to a second connecting portion 210. The second connecting portion 210 is disposed at the edge of the second buffer body 220. The second buffer member 200 has a first groove 211 that penetrates the second buffer body 220 along the thickness direction of the second buffer member 200. Specifically, the first groove 211 extends from one side surface to the other along the thickness direction of the second buffer member 200, forming a through groove. The opening of the first groove 211 is disposed on one side surface of the second connecting portion 210. The shape and size of the first groove 211 match the first protrusion 111, so that the first protrusion 111 is embedded in the first groove 211, thereby enabling the second buffer member 200 to be detachably connected to the first buffer member 100.

[0056] It should be noted that during assembly, the first protrusion 111, with its specific size and shape, can be embedded into the first groove 211 to form a stable and detachable connection. This convex-concave fit design not only ensures that the first buffer 100 and the second buffer 200 form a stable buffer cavity 300 after assembly, providing reliable buffer protection for the battery cell 420, but also allows the first protrusion 111 to disengage from the first groove 211 with only a reasonable external force during disassembly. This facilitates the maintenance, replacement, or reassembly of the first buffer 100 and the second buffer 200, greatly improving the convenience and practicality of the buffer structure 410 in practical applications.

[0057] In some embodiments, such as Figure 1 As shown, the connection structure between the first buffer 100 and the second buffer 200 is further optimized. The maximum dimension of the side of the first protrusion 111 away from the first connecting portion 110 is greater than the dimension of the side of the first protrusion 111 close to the first connecting portion 110, forming a structure that expands outward from the first connecting portion 110 in the direction away from the first buffer body 120. Correspondingly, the maximum groove diameter of the first groove 211 is greater than the size of the groove opening of the first groove 211. Specifically, the maximum groove diameter of the first groove 211 refers to the maximum distance between the groove walls of the first groove 211 in the plane direction where the groove opening is located; the size of the groove opening of the first groove 211 refers to the maximum diameter of the groove opening of the first groove 211. It should be noted that this design allows the first protrusion 111 to fit into the first groove 211 through the mortise and tenon joint principle, with the first protrusion 111 and the first groove 211 fitting together in a mortise and tenon structure, enhancing the stability of the connection between the first buffer 100 and the second buffer 200. Even under complex conditions such as severe vibration and impact on the battery module, the first protrusion 111 and the first groove 211 are not easily separated, effectively avoiding the problem of buffer function failure due to loose connection; at the same time, when disassembly is required, external force can be applied along the thickness direction of the first buffer body 120 to achieve rapid separation of the first buffer 100 and the second buffer 200, taking into account both connection reliability and disassembly convenience.

[0058] In some embodiments, such as Figure 1As shown, to further enhance the connection stability and assembly flexibility of the buffer structure 410, the end structures of the first buffer member 100 and the second buffer member 200 are optimized. The first buffer member 100 is provided with a fifth connecting portion 140, which connects to the end of the first buffer body 120 away from the first connecting portion 110; specifically, both ends of the first buffer body 120 have connecting structures. The first buffer member 100 has a third groove 141, which penetrates the fifth connecting portion 140 along the thickness direction of the first buffer member 100, and is located on the side of the fifth connecting portion 140 away from the first buffer body 120. Specifically, the structure of the third groove 141 refers to the structure of the first groove 211.

[0059] The second buffer member 200 further includes a sixth connecting portion 240, which is connected to the side of the second buffer body 220 away from the second connecting portion 210. A third protrusion 241 protrudes from the side of the sixth connecting portion 240 opposite to the second buffer body 220. Specifically, the third protrusion 241 is convex, vertically protruding from the side of the sixth connecting portion 240 opposite to the second buffer body 220, and its outline dimensions are adapted to the third groove 141. The third protrusion 241 and the third groove 141 form a mortise and tenon structure, that is, the third protrusion 241 is embedded in the third groove 141, so that the fifth connecting portion 140 and the sixth connecting portion 240 are detachably connected. Specifically, the structure of the third protrusion 241 refers to the structure of the first protrusion 111.

[0060] The first buffer 100 and the second buffer 200 are detachably connected through the engagement of the first protrusion 111 and the first groove 211, and the engagement of the third protrusion 241 and the third groove 141. Specifically, both the first buffer 100 and the second buffer 200 can be machined separately, thereby reducing material waste; at the same time, the detachable connection design not only ensures a stable and convenient connection, but also allows for quick separation of the first buffer 100 and the second buffer 200 during disassembly. It can be seen that the buffer structure 410 of this embodiment balances connection reliability and disassembly convenience.

[0061] In some examples, please refer to Figure 2 When the buffer structure 410 has only one first buffer member 100 and one second buffer member 200, one structural scheme of the buffer structure 410 is as follows: a first protrusion 111 is disposed on the side of the first connecting portion 110 away from the first buffer body 120, and protrudes from the first connecting portion 110 in a direction away from the first buffer body 120. A third groove 141 is formed on the fifth connecting portion 140, and the opening of the third groove 141 faces the buffer cavity 300.

[0062] The first groove 211 is formed on the second connecting part 210, and the opening of the first groove 211 faces the buffer cavity 300. The third protrusion 241 is provided on the side of the sixth connecting part 240 away from the second buffer body 220, and protrudes from the sixth connecting part 240 in a direction away from the second buffer body 220.

[0063] The first protrusion 111 engages with the first groove 211, and the third groove 141 engages with the third protrusion 241, thereby achieving a detachable connection between the first buffer 100 and the second buffer 200.

[0064] In some examples, please refer to Figure 3 When the buffer structure 410 has only one first buffer member 100 and one second buffer member 200, another structural scheme of the buffer structure 410 is as follows: a first protrusion 111 is provided on the first connecting part 110 and protrudes from the first connecting part 110 into the buffer cavity 300. A third groove 141 is formed in the fifth connecting part 140, and the groove opening of the third groove 141 faces the fifth connecting part 140 away from the first buffer body 120.

[0065] A first groove 211 is formed on the second connecting portion 210, and the opening of the first groove 211 faces the second connecting portion 210 away from the second buffer body 220. A third protrusion 241 is provided on the side of the sixth connecting portion 240 facing the buffer cavity 300.

[0066] The first protrusion 111 engages with the first groove 211, and the third groove 141 engages with the third protrusion 241, thereby achieving a detachable connection between the first buffer 100 and the second buffer 200.

[0067] In some embodiments, please refer to Figure 4 To meet the needs of battery modules of different specifications and shapes, the buffer structure 410 adopts a modular design concept, consisting of multiple first buffer elements 100 and multiple second buffer elements 200. The multiple first buffer elements 100 and multiple second buffer elements 200 are arranged alternately and connected end-to-end to form a buffer cavity 300. Whether the battery cell 420 is square, round, or irregularly shaped, the outline and size of the buffer cavity 300 can be flexibly changed to adapt to the shape of the battery cell 420 by adjusting the number and arrangement of the first buffer elements 100 and the second buffer elements 200. This design improves the versatility and applicability of the buffer structure 410.

[0068] In some embodiments, please refer to Figure 5The first buffer member 100 has two opposing first connecting portions 110, which are located on both sides of the length direction of the first buffer body 120. Each first connecting portion 110 has a first protrusion 111 on the side away from the first buffer body 120. Specifically, the first buffer member 100 adopts a symmetrical double first connecting portion 110 structure, with the two first connecting portions 110 being mirror-symmetrically distributed to ensure balanced force distribution. Each first connecting portion 110 has a first protrusion 111 on the side away from the first buffer body 120. The maximum dimension of the first protrusion 111 on the side away from the first buffer body 120 is larger than the dimension of the first protrusion 111 on the side closer to the first buffer body 120, forming a structure that expands outward from the first buffer body 120 to the external environment, thus forming a stable connection anchor point.

[0069] The second buffer member 200 has two opposing second connecting portions 210, each of which has a first groove 211. The opening of each first groove 211 corresponds to the side of the second connecting portion 210 closest to the first connecting portion 110. Specifically, the openings of the two first grooves 211 are located on the same side surface of the second buffer member 200.

[0070] Specifically, this embodiment enables the second buffer 200 to be inserted into the first protrusion 111 of the adjacent first buffer 100 through the slot on the same side when connected to the first buffer 100. This achieves rapid assembly while ensuring that the force direction of all connection points is consistent, effectively avoiding structural loosening caused by uneven force.

[0071] In some embodiments, please refer to Figure 6 The first buffer 100 has two opposing first connecting portions 110, which are located on both sides of the length of the first buffer body 120. The two first connecting portions 110 are mirror-image distributed about the centerline of the first buffer body 120. This symmetrical structure effectively disperses stress under load, ensuring balanced stress distribution throughout the buffer. Each first connecting portion 110 has a first protrusion 111 protruding from the side facing the buffer cavity 300. The maximum size of the first protrusion 111 on the side away from the first connecting portion 110 is larger than that on the side closer to the first connecting portion 110, forming a shape that expands outward into the interior space of the buffer cavity 300, facilitating docking with the second buffer 200.

[0072] The second buffer member 200 has two opposing second connecting portions 210, which correspond to the two first connecting portions 110 of the first buffer member 100. Each second connecting portion 210 is provided with a first groove 211. The opening of the first groove 211 is located on the side of the second connecting portion 210 away from the second buffer body 220. The size and shape of the opening of the first groove 211 match the first protrusion 111, and its groove wall has a complementary structure to the first protrusion 111.

[0073] Specifically, when the first buffer 100 and the second buffer 200 are assembled, the first protrusion 111 can be embedded into the first groove 211, making the connection operation convenient and efficient. Simultaneously, due to the mortise and tenon joint principle between the first protrusion 111 and the first groove 211, a stable connection can be maintained even under conditions of long-term vibration of the battery module and frequent expansion and contraction of the battery cell 420. Furthermore, this structural design allows multiple first buffers 100 and second buffers 200 to be spliced ​​together to quickly construct a well-sealed buffer cavity 300 structure, precisely adapting to the external dimensions of battery cells 420 of different specifications, thus improving the versatility and reliability of the buffer structure 410 in battery module applications.

[0074] In some embodiments, please refer to Figure 7 The second buffer member 200 further includes a fourth connecting portion 230, which is connected to the side of the second buffer body 220 away from the second connecting portion 210; a second protrusion 231 protrudes from one side of the fourth connecting portion 230. The first buffer member 100 further includes a third connecting portion 130, which is connected to the side of the first buffer body 120 away from the first connecting portion 110; the first buffer member 100 has a second groove 131, which penetrates the third connecting portion 130 along the thickness direction of the first buffer member 100. Specifically, the structure of the second groove 131 is the same as the structure of the first groove 211; the structure of the second protrusion 231 is the same as the structure of the first protrusion 111.

[0075] It should be noted that the second protrusion 231 is embedded in the second groove 131, so that the third connecting part 130 and the fourth connecting part 230 can be detachably connected. Through the cooperation of the first protrusion 111 and the first groove 211, and the cooperation of the second protrusion 231 and the second groove 131, multiple first buffer members 100 and multiple second buffer members 200 are arranged alternately and connected end to end to form a buffer cavity 300. Specifically, the first protrusion 111 of the first buffer member 100 is embedded in the first groove 211 of the adjacent second buffer member 200, and at the same time, the second protrusion 231 of the second buffer member 200 is embedded in the second groove 131 of another first buffer member 100, and so on to form a closed loop structure. This dual connection design not only improves the structural strength of the buffer cavity 300, but also, through modular combination, allows for flexible adjustment of the shape of the buffer structure 410 according to the size and arrangement of the battery cell 420, significantly enhancing the adaptability of the buffer structure 410 to battery modules of different specifications. Furthermore, the detachable connection feature allows for the replacement of partial components without the need for complete disassembly, significantly reducing maintenance and time costs, and further enhancing the economy and practicality of the buffer structure 410 in actual applications.

[0076] In some embodiments, please refer to Figure 8 The first protrusion 111 protrudes from the first connecting portion 110 on the side away from the first buffer body 120; the groove of the second groove 131 is located on the side of the third connecting portion 130 facing the fourth connecting portion 230, that is, facing the buffer cavity 300. The groove of the first groove 211 is located on the side of the second connecting portion 210 facing the buffer cavity 300; the second protrusion 231 protrudes from the side of the fourth connecting portion 230 away from the second buffer body 220.

[0077] Specifically, the cooperation between the first protrusion 111 and the first groove 211, and between the second protrusion 231 and the second groove 131, not only enables the alternating arrangement and end-to-end connection of multiple first buffer members 100 and multiple second buffer members 200 to form a buffer cavity 300, but also allows external stress to be evenly distributed throughout the buffer structure 410 through these connection points. This design not only improves the space utilization efficiency of the buffer structure 410, but also significantly enhances its ability to resist external impacts and the expansion stress of the battery cell 420.

[0078] In some embodiments, please refer to Figure 9 The first protrusion 111 protrudes from the side of the first connecting part 110 facing the buffer cavity 300; the groove of the second groove 131 is located on the side of the third connecting part 130 away from the first buffer body 120; the groove of the first groove 211 is located on the side of the second connecting part 210 away from the second buffer body 220; the second protrusion 231 protrudes from the side of the second connecting part 210 facing the buffer cavity 300.

[0079] It should be noted that the cooperation between the first protrusion 111 and the first groove 211, and between the second protrusion 231 and the second groove 131, not only enables the alternating arrangement and end-to-end connection of multiple first buffer members 100 and multiple second buffer members 200 to form a buffer cavity 300, but also allows external stress to be evenly distributed throughout the buffer structure 410 through these connection points. This design not only improves the space utilization efficiency of the buffer structure 410, but also significantly enhances its ability to resist external impacts and the expansion stress of the battery cell 420.

[0080] Accordingly, please refer to Figure 10 This application also provides a battery module, which includes multiple buffer structures 410 as described in any of the above embodiments. Therefore, the battery module can have all the technical features and beneficial effects of the buffer structure 410, which will not be repeated here. The battery module also includes multiple battery cells 420, which are arranged sequentially at intervals along the thickness direction of the buffer structure 410, and a buffer structure 410 is provided between two adjacent battery cells 420, and the buffer structure 410 is in contact with the two adjacent battery cells 420.

[0081] It should be noted that the thickness of the buffer structure 410 is 2% to 4% of the thickness of the cell 420. That is, the thickness of the buffer structure 410 can be any percentage or any range between two percentages of the thickness of the cell 420, such as 2%, 3%, or 4%.

[0082] The distance between the buffer structure 410 and the edge of the outer casing of the battery cell 420 is 7 to 10 mm. That is, the distance between the buffer structure 410 and the edge of the outer casing of the battery cell 420 can be any value among 7 mm, 8 mm, 9 mm, and 10 mm, or any range between two values. Since the distance between the core inside the battery cell 420 and the edge of the outer casing of the battery cell 420 is 7 to 10 mm, in order for the buffer structure 410 to fully function on the core, the distance between the buffer structure 410 and the edge of the outer casing of the battery cell 420 is designed to be the same as the distance between the core and the edge of the outer casing of the battery cell 420.

[0083] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0084] The above provides a detailed description of a buffer structure and battery module provided in the embodiments of this application. Specific examples have been used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A buffer structure, characterized in that, include: The first buffer (100) includes a first connecting part (110); The second buffer (200) includes a second connecting part (210), which is detachably connected to the first connecting part (110) so that the first buffer (100) and the second buffer (200) are connected and form a buffer cavity (300).

2. The buffer structure according to claim 1, characterized in that, The first buffer (100) further includes a first buffer body (120), which is connected to the first connecting part (110); a first protrusion (111) is provided on one side of the first connecting part (110); The second buffer member (200) further includes a second buffer body (220), which is connected to the second connecting portion (210); the second buffer member (200) has a first groove (211), which penetrates the second connecting portion (210) along the thickness direction of the second buffer member (200); The first protrusion (111) is embedded in the first groove (211) so that the second buffer (200) is detachably connected to the first buffer (100).

3. The buffer structure according to claim 2, characterized in that, The maximum dimension of the first protrusion (111) on the side away from the first connecting portion (110) is greater than the dimension of the first protrusion (111) on the side closer to the first connecting portion (110); The maximum diameter of the first groove (211) is greater than the size of the opening of the first groove (211).

4. The buffer structure according to claim 3, characterized in that, The buffer structure (410) includes a plurality of first buffer elements (100) and a plurality of second buffer elements (200), which are arranged alternately and connected end to end to form the buffer cavity (300).

5. The buffer structure according to claim 4, characterized in that, The first buffer (100) has two first connecting portions (110) arranged opposite to each other. The two first connecting portions (110) are arranged on both sides of the length direction of the first buffer body (120). Each first connecting portion (110) has a first protrusion (111) on the side away from the first buffer body (120). The second buffer (200) has two opposing second connecting portions (210), each of which has a first groove (211) formed thereon, and the opening of each first groove (211) is located on the side of the corresponding second connecting portion (210) close to the first connecting portion (110).

6. The buffer structure according to claim 4, characterized in that, The first buffer (100) has two first connecting portions (110) arranged opposite to each other. The two first connecting portions (110) are arranged on both sides of the length direction of the first buffer body (120). Each first connecting portion (110) has a first protrusion (111) protruding on the side facing the buffer cavity (300). The second buffer (200) has two opposing second connecting portions (210), each of which has a first groove (211) provided on it. The opening of the first groove (211) is located on the side of the second connecting portion (210) away from the second buffer body (220).

7. The buffer structure according to claim 4, characterized in that, The second buffer (200) further includes a fourth connecting part (230), which is connected to the side of the second buffer body (220) away from the second connecting part (210); a second protrusion (231) is provided on one side of the fourth connecting part (230); The first buffer member (100) further includes a third connecting portion (130), which is connected to the side of the first buffer body (120) away from the first connecting portion (110); the first buffer member (100) has a second groove (131), which extends through the third connecting portion (130) along the thickness direction of the first buffer member (100); The second protrusion (231) is embedded in the second groove (131) so that the third connecting part (130) and the fourth connecting part (230) are detachably connected.

8. The buffer structure according to claim 7, characterized in that, The first protrusion (111) protrudes from the side of the first connecting part (110) away from the first buffer body (120); the groove of the second groove (131) is located on the side of the third connecting part (130) facing the fourth connecting part (230); The opening of the first groove (211) is located on the side of the second connecting part (210) facing the buffer cavity (300); the second protrusion (231) protrudes from the side of the fourth connecting part (230) away from the second buffer body (220).

9. The buffer structure according to claim 7, characterized in that, The first protrusion (111) protrudes from the side of the first connecting part (110) facing the buffer cavity (300); the groove of the second groove (131) is located on the side of the third connecting part (130) away from the first buffer body (120); The opening of the first groove (211) is located on the side of the second connecting part (210) away from the second buffer body (220); the second protrusion (231) protrudes from the side of the second connecting part (210) facing the buffer cavity (300).

10. A battery module, characterized in that, include: Multiple buffer structures (410) as described in any one of claims 1 to 9; Multiple battery cells (420) are arranged sequentially at intervals along the thickness direction of the buffer structure (410), and the buffer structure (410) is provided between two adjacent battery cells (420), and the buffer structure (410) is in contact with the two adjacent battery cells (420).

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