Restraining structure and battery restraining apparatus

Abstract

The present application is applicable to the technical field of batteries, and provides a restraining structure (100) and a battery restraining apparatus (1000). The battery restraining apparatus (1000) comprises restraining structures (100); and each restraining structure (100) comprises a restraining frame (10), a cushion pad (20), and positioning columns (30). The restraining frame (10) is provided with positioning holes (101); the cushion pad (20) is arranged on the restraining frame (10); and the positioning columns (30) are arranged on the cushion pad (20) and are inserted and fitted into the positioning holes (101). The positioning holes (101) are formed in the restraining frame (10), and the positioning columns (30) inserted and fitted into the positioning holes (101) are provided on the cushion pad (20), so that the positioning of the cushion pad (20) on the restraining frame (10) can be achieved by inserting the positioning columns (30) into the positioning holes (101). In this way, the problem of misaligned assembly of the cushion pad (20) on the restraining frame (10) can be mitigated, thereby facilitating improving the restraining effect of the restraining structure (100) on a battery cell (2000).

Description

Restraint structure and battery restraint device

[0001] Cross-references

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on July 4, 2023, with application number 202321731798.8 and application name "Restraint Structure and Battery Restraint Device", the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a restraint structure and a battery restraint device. Background Art

[0004] During the battery manufacturing process, a restraint structure is often required to restrain the battery cells. The restraint structure includes a restraint frame and a cushioning pad mounted on the restraint frame. The restraint structure contacts and squeezes the battery cells through the cushioning pad to provide restraint and cushioning protection.

[0005] In some cases, when assembling the buffer pad and the restraint frame, it is difficult to assemble the buffer pad to the predetermined position of the restraint frame, and there is a risk that the buffer pad will be misaligned on the restraint frame, thereby affecting the restraint effect of the restraint structure on the battery cell.

[0006] Summary of the Invention

[0007] In view of the above problems, an object of the embodiments of the present application is to provide a restraint structure and a battery restraint device, which can improve the problem of misalignment of the cushion during assembly on the restraint frame.

[0008] The technical solution adopted in the embodiment of this application is:

[0009] In a first aspect, an embodiment of the present application provides a restraint structure, comprising:

[0010] The restraint frame is provided with a positioning hole;

[0011] A cushion, provided on the restraint frame;

[0012] The positioning column is arranged on the buffer pad and is plugged into and matched with the positioning hole.

[0013] The restraint structure provided in the embodiments of the present application utilizes positioning holes provided on the restraint frame and positioning posts provided on the cushion pad that engage with the positioning holes. By inserting the positioning posts into the positioning holes, the cushion pad can be positioned on the restraint frame. This alleviates the problem of misalignment of the cushion pad during assembly on the restraint frame, thereby enhancing the restraint structure's effectiveness in restraining the battery cells.

[0014] In some embodiments, there are multiple positioning posts, which are spaced apart on the buffer pad; the restraint frame is provided with multiple spaced apart positioning holes, and each positioning post is plugged into each positioning hole.

[0015] By adopting the above technical solution, the cushion pads are inserted into the positioning holes of the restraint frame via multiple positioning posts in a one-to-one correspondence. This helps to improve the positioning strength and positioning accuracy of the cushion pads on the restraint frame, thereby improving the problem of misalignment of the cushion pads on the restraint frame. It also helps to improve the assembly strength of the cushion pads on the restraint frame, thereby improving the problem of the cushion pads easily falling off the restraint frame.

[0016] In some embodiments, the plurality of positioning posts on the cushion are distributed in an array.

[0017] In some embodiments, the positioning column is inserted into the positioning hole along the first direction; the multiple positioning columns are divided into at least one first positioning column and at least one second positioning column, and the cross-sectional area of ​​the first positioning column perpendicular to the first direction is greater than the cross-sectional area of ​​the second positioning column perpendicular to the first direction.

[0018] This arrangement can improve the positioning strength and positioning accuracy of the cushion on the restraint frame, thereby improving the problem of misalignment of the cushion when assembled on the restraint frame. It also facilitates the positioning of the cushion on the restraint frame, thereby improving the positioning and assembly efficiency of the cushion on the restraint frame.

[0019] In some embodiments, the number of the first positioning post is one, and the number of the second positioning post is multiple.

[0020] With this arrangement, the buffer pad is pre-positioned on the restraint frame by the first positioning post, and the buffer pad can be quickly positioned on the restraint frame, thereby improving the positioning and assembly efficiency of the buffer pad on the restraint frame.

[0021] In some embodiments, the positioning column is inserted into the positioning hole along a first direction; the positioning column includes a column body and a guide portion; in the first direction, one end of the column body is set on the buffer pad, the guide portion is connected to the end of the column body away from the buffer pad, and the outer peripheral wall of the guide portion is set to be tapered along the direction away from the buffer pad.

[0022] Such an arrangement enables the positioning post to be inserted into the positioning hole in a guided manner, thereby facilitating the positioning of the buffer pad on the restraint frame and also helping to improve the positioning and assembly efficiency of the buffer pad on the restraint frame.

[0023] In some embodiments, in at least one positioning post, an end of the guide portion close to the post body extends beyond an outer peripheral wall of the post body.

[0024] In this way, the assembly strength of the buffer pad on the restraint frame can be improved.

[0025] In some embodiments, the positioning column is inserted into the positioning hole along the first direction; at least one positioning hole includes a first hole section and a second hole section connected in sequence along the first direction, and the aperture of the second hole section is larger than the aperture of the first hole section; the column is inserted into the first hole section, and the guide portion is limited to the second hole section along the direction from the second hole section to the first hole section.

[0026] Such an arrangement allows the positioning post to not extend beyond the side of the restraint frame away from the buffer pad along the first direction, so that both opposite sides of the restraint frame along the first direction can be used to assemble the buffer pad to restrain the battery cell.

[0027] In some embodiments, at least one positioning column further includes a transition portion, and the column body, the transition portion and the guide portion are arranged sequentially along the first direction, and the end of the guide portion close to the column body extends beyond the outer peripheral wall of the column body; the outer peripheral wall of the transition portion is gradually decreased from the guide portion to the column body.

[0028] By providing the transition portion, it is easy to remove the guide portion from the positioning hole, thereby facilitating the removal of the positioning column from the positioning hole, and further facilitating the replacement of the buffer pad on the restraint frame.

[0029] In some embodiments, on the cross section of the positioning column parallel to the first direction, the outer peripheral wall of the guide portion is set as an outwardly convex arc surface, or the outer peripheral wall of the guide portion is set as an inclined surface inclined relative to the first direction, or the outer peripheral wall of the guide portion is set as a combination of an inclined surface inclined relative to the first direction and a convex arc surface.

[0030] In some embodiments, the buffer pad and the positioning column are integrally formed.

[0031] This arrangement allows the positioning post to also have a buffering property, allowing the positioning post to be squeezed and deformed, and to smoothly enter and exit the positioning hole. This facilitates the disassembly and assembly of the positioning post on the positioning hole, and facilitates the disassembly and assembly of the buffer pad on the restraint frame.

[0032] In some embodiments, the positioning post is inserted into the positioning hole along the first direction; the restraint frame includes a frame body and a partition disposed on the frame body, the partition body is provided with a positioning hole, and buffer pads are provided on opposite sides of the partition body along the first direction.

[0033] Such an arrangement enables the restraint structure to be located between two battery cells adjacent to each other along the first direction, so as to restrain the two adjacent battery cells respectively.

[0034] In some embodiments, the positioning posts on the buffer pads on opposite sides of the partition are staggered.

[0035] With this arrangement, on the one hand, the positioning holes can be set as through holes that pass through the partition along the first direction, that is, the thickness of the partition can be made very small, which is conducive to reducing the size of the restraint structure along the first direction. On the other hand, it is easy to position the buffer pads on opposite sides of the partition on the partition.

[0036] In some embodiments, the buffer pad is provided with a first side surface and a second side surface on opposite sides along the first direction, and the positioning column is provided on the first side surface and inserted into the positioning hole along the first direction; the second side surface is recessed at one end or both ends along the second direction, and the first direction intersects with the second direction.

[0037] This arrangement, on the one hand, can alleviate the problem of dents on the edges of the battery cells along the second direction. On the other hand, the cushioning pad can guide the battery cells, facilitating their placement into the side of the restraint structure along the first direction, and particularly facilitating placement between two adjacent restraint structures along the first direction.

[0038] In some embodiments, the second side surface includes a first restraint surface and a second restraint surface provided at one or both ends of the first restraint surface along the second direction; in the second direction, the distance between the second restraint surface and the first side surface is gradually decreased in the direction away from the first restraint surface.

[0039] This arrangement can improve the problem of the second restraint surface pressing the battery cell edge along the second direction into a dent. On the other hand, the second restraint surface can guide the battery cell, making it easier for the battery cell to be placed into the side of the restraint structure along the first direction.

[0040] In some embodiments, on a cross section of the buffer pad perpendicular to a third direction, the second restraint surface is an inclined surface or an arc surface inclined relative to the first direction and the second direction, and the third direction is perpendicular to the first direction and the second direction.

[0041] In some embodiments, the second restraint surface and the extension of the first restraint surface form an angle smaller than 45°.

[0042] This arrangement improves the problem of the buffer pad pressing the edge of the battery cell along the second direction into a dent, and also allows the portion of the buffer pad at the second restraining surface to still provide a certain restraining stress to the battery cell.

[0043] In some embodiments, the restraint structure further includes an isolation film, which is coated on the buffer pad to separate the buffer pad and the battery cell.

[0044] Such a configuration can, on the one hand, improve the problem of the buffer pad being adhered to the battery cell, and on the other hand, improve the problem of contaminants generated by squeezing the buffer pad remaining on the battery cell.

[0045] In a second aspect, an embodiment of the present application provides a battery restraint device comprising a plurality of restraint structures.

[0046] The battery restraint device provided in the embodiment of the present application, by adopting the restraint structure involved above, can improve the problem of misalignment of the buffer pad during assembly on the restraint frame, thereby improving the restraint effect of the battery restraint device on the battery cell.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] FIG1 is a top view of a battery restraint device and a battery cell provided in some embodiments of the present application;

[0050] FIG2 is a perspective view of the two restraining structures of the battery restraining device shown in FIG1 in conjunction with a battery cell;

[0051] FIG3 is an exploded view of the structure shown in FIG2 ;

[0052] FIG4 is a schematic diagram of the cooperation between the buffer pad and the positioning post of the restraint structure provided by some embodiments of the present application;

[0053] FIG5 is a perspective schematic diagram of a restraint frame of a restraint structure provided by some embodiments of the present application;

[0054] FIG6 is a partial schematic diagram of a restraint structure provided by some embodiments of the present application;

[0055] FIG7 is a cross-sectional view taken along AA in FIG6 ;

[0056] FIG8 is an enlarged view of point B in FIG7;

[0057] FIG9 is an exploded view of the enlarged view shown in FIG8;

[0058] FIG10 is an enlarged view of point C in FIG7 ;

[0059] FIG11 is an exploded view of the enlarged view shown in FIG10 ;

[0060] FIG12 is a perspective schematic diagram of a buffer pad of a restraint structure provided in some embodiments of the present application.

[0061] Among them, the figure marks in the figure are: 1000-battery restraint device; 100-restraint structure; 200-tray; 2000-battery cell; 10-restraint frame; 101-positioning hole; 101a-first positioning hole; 101b-second positioning hole; 1011-first hole section; 1012-second hole section; 11-frame; 12-partition; 20-buffer pad; 201-first side; 202-second side; 2021-first restraint surface; 2022-second restraint surface; 30-positioning column; 30a-first positioning column; 30b-second positioning column; 31-column; 32-guide part; 33-transition part; 40-isolating membrane; Z-first direction; Y-second direction; X-third direction. DETAILED DESCRIPTION

[0062] The following describes in detail embodiments of the present application, examples of which 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 intended to be used to explain the present application, and should not be construed as limiting the present application.

[0063] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0065] In the description of this application, "a plurality of" means more than two, and unless otherwise specifically defined, "more than two" includes two. Accordingly, "a plurality of groups" means more than two groups, including two groups.

[0066] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0067] In the description of this application, the term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the related objects are in an "or" relationship.

[0068] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

[0069] During the battery manufacturing process, a battery restraint device is often required to restrain the battery cells. For example, during the formation stage, gas is generated inside the battery cells, requiring them to be transported to the battery restraint device. By squeezing the battery cells with the battery restraint device, the gas inside the battery cells can be discharged to the outside. For another example, squeezing the battery cells with the battery restraint device can also make the internal structures of the battery cells, such as the electrode and diaphragm, more compact.

[0070] In related art, battery restraint devices include multiple restraint structures, with two adjacent restraint structures positioned on opposite sides of a battery cell to collectively restrain the cell. The restraint structures include a restraint frame and a cushioning pad mounted on the restraint frame. The cushioning pads contact and compress the battery cell, providing both restraint and cushioning protection.

[0071] In some cases, when assembling the buffer pad and the restraint frame, it is difficult to assemble the buffer pad to the predetermined position of the restraint frame, and there is a risk that the buffer pad will be misaligned on the restraint frame, thereby affecting the restraint effect of the restraint structure on the battery cell.

[0072] Based on the above considerations, the present invention provides a restraint structure and battery restraint device. By providing positioning holes on the restraint frame and positioning posts on the cushion pad that plug into the positioning holes, the cushion pad can be positioned on the restraint frame by inserting the positioning posts into the positioning holes. This can alleviate the problem of misalignment of the cushion pad during assembly on the restraint frame, thereby improving the restraint effect of the restraint structure on the battery cells.

[0073] The battery restraint devices described in the embodiments of this application are primarily used to restrain battery cells. A battery cell is the smallest unit that stores and outputs electrical energy. A battery cell can be a secondary battery or a primary battery. A battery cell can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. In some contexts, a battery cell may also be referred to as a battery cell.

[0074] The battery restraint device of the embodiment of the present application may include multiple restraint structures, and the battery restraint device restrains the battery cells through the restraint structures. In particular, each battery cell is arranged between two adjacent restraint structures to achieve restraint through the two adjacent restraint structures.

[0075] The restraint structures involved in the embodiments of this application can be used to restrain battery cells, or they can be used to restrain other structures besides battery cells. For ease of description, the embodiments of this application use the restraint structure used to restrain battery cells as an example. The same logic can be applied to the restraint structure used to restrain other structures, and we will not elaborate on them here.

[0076] Please refer to Figure 1, which is a top view of a battery restraint device 1000 provided in some embodiments of the present application in conjunction with a battery cell 2000. The battery restraint device 1000 includes a tray 200 and a plurality of restraint structures 100 disposed on the tray 200. The plurality of restraint structures 100 are arranged to form at least one row. When there are multiple rows of restraint structures 100, the multiple rows of restraint structures 100 are spaced apart. A row of restraint structures 100 includes a plurality of restraint structures 100, and the plurality of restraint structures 100 are arranged in sequence along a first direction Z, and a battery cell 2000 is disposed between two adjacent restraint structures 100 along the first direction Z. The two adjacent restraint structures 100 along the first direction Z jointly restrain the battery cell 2000 between them.

[0077] Please refer to Figures 2 to 5 together. Figure 2 is a three-dimensional structural diagram of the two restraint structures 100 of the battery restraint device 1000 provided in some embodiments of the present application, which jointly restrain the battery cell 2000. Figure 3 is a decomposition diagram of the structure shown in Figure 2. Figure 4 is a three-dimensional schematic diagram of the cooperation between the buffer pad 20 and the positioning column 30 of the restraint structure 100 provided in some embodiments of the present application. Figure 5 is a three-dimensional schematic diagram of the restraint frame 10 of the restraint structure 100 provided in some embodiments of the present application. The restraint structure 100 provided in an embodiment of the present application includes a restraint frame 10, a buffer pad 20 and a positioning column 30. The restraint frame 10 is provided with a positioning hole 101. The buffer pad 20 is arranged on the restraint frame 10. The positioning column 30 is arranged on the buffer pad 20 and is plugged into and matched with the positioning hole 101.

[0078] The restraint frame 10 is a frame portion of the restraint structure 100 and is used to assemble the buffer pad 20 . The restraint frame 10 is disposed on the tray 200 .

[0079] The buffer pad 20 is a component with buffering properties and can be a silicone pad, a rubber pad, or the like. When the restraint structure 100 restrains the battery cell 2000, the buffer pad 20 is located between the restraint frame 10 and the battery cell 2000. One side of the buffer pad 20 elastically abuts the battery cell 2000, while the other side of the buffer pad 20 elastically abuts the restraint frame 10. Under the action of the restraint frame 10, the buffer pad 20 applies pressure to the battery cell 2000, thereby restraining the battery cell 2000. Furthermore, the buffer pad 20 is elastically compressed, providing a buffering effect on the battery cell 2000, thereby providing buffering protection for the battery cell 2000.

[0080] The positioning post 30 is a columnar structure. The positioning post 30 has an axial direction, which refers to the direction in which the positioning post 30 extends. The positioning post 30 can be a cylindrical structure, meaning that the cross-section of the positioning post 30 perpendicular to the axial direction is circular. Of course, the cross-section of the positioning post 30 perpendicular to the axial direction can also be elliptical, triangular, square, prismatic, or other shapes.

[0081] The positioning hole 101 may be a through hole that passes through the restraint frame 10 or a hole that does not pass through the restraint frame 10. The positioning hole 101 has an axial direction, and the axial direction of the positioning hole 101 is parallel to the axial direction of the positioning post 30.

[0082] For the convenience of description, the axial direction involved in the embodiments below refers to the axial direction of the positioning column 30 , which is also the axial direction of the positioning hole 101 .

[0083] It is understood that the positioning post 30 is inserted into the positioning hole 101 along the axial direction. As an example, as shown in Figure 4, the axial direction of the positioning post 30 and the axial direction of the positioning hole 101 are both parallel to the direction Z. That is, the positioning post 30 is inserted into the positioning hole 101 along the direction Z to achieve positioning between the positioning post 30 and the restraint frame 10, thereby achieving positioning of the cushion 20 on the restraint frame 10. The axial direction is parallel to the first direction Z referred to below. That is, the positioning post 30 is inserted into the positioning hole 101 along the first direction Z.

[0084] The restraint structure 100 provided in the embodiment of the present application has positioning holes 101 provided on the restraint frame 10, and positioning posts 30 provided on the cushion 20 that plug into and mate with the positioning holes 101. This allows the cushion 20 to be plugged into the positioning holes 101 via the positioning posts 30, thereby achieving positioning of the cushion 20 on the restraint frame 10. This alleviates the problem of misalignment of the cushion 20 during assembly on the restraint frame 10, thereby improving the restraining effect of the restraint structure 100 on the battery cells 2000.

[0085] Moreover, when assembling the buffer pad 20, it is only necessary to insert the positioning column 30 into the positioning hole 101 of the restraint frame 10 to achieve the positioning of the buffer pad 20 on the restraint frame 10, making the assembly operation of the buffer pad 20 on the restraint frame 10 very simple and convenient, which is conducive to improving the manufacturing efficiency of the battery restraint device 1000.

[0086] In addition, the positioning post 30 is disposed on the cushion 20 and inserted into the positioning hole 101 , which can also improve the assembly strength of the cushion 20 on the restraint frame 10 and improve the problem of the cushion 20 falling off.

[0087] In some embodiments, please refer to Figures 3 to 5 in conjunction with other figures. A plurality of positioning posts 30 are provided, each spaced apart on the cushion 20. The restraint frame 10 is provided with a plurality of spaced apart positioning holes 101, each of which is engaged with a respective positioning post 30.

[0088] The number of the positioning posts 30 is the same as the number of the positioning holes 101 , and the plurality of positioning posts 30 and the plurality of positioning holes 101 are plugged in and matched one-to-one.

[0089] As an example, as shown in Figures 3 to 5, the multiple positioning posts 30 on the buffer pad 20 can be distributed in an array. Specifically, the multiple positioning posts 30 are divided into multiple rows of positioning posts 30, and the multiple rows of positioning posts 30 are spaced apart along direction X, and each row of positioning posts 30 includes multiple positioning posts 30 spaced apart along direction Y. In this way, the multiple positioning posts 30 are distributed in an array along direction X and direction Y. Correspondingly, the multiple positioning holes 101 on the restraint frame 10 are also distributed in an array corresponding to the positioning posts 30, so that each positioning post 30 is plugged into and matched with each positioning hole 101 in a one-to-one manner. Among them, direction X, direction Y and direction Z are the directions of the three coordinate axes in the spatial coordinate system, that is, direction X is perpendicular to direction Y, direction X is perpendicular to direction Z, and direction Y is perpendicular to direction Z. Of course, the multiple positioning posts 30 on the buffer pad 20 and the multiple positioning holes 101 on the restraint frame 10 can also be distributed in other distribution directions. Even more, the plurality of positioning posts 30 on the buffer pad 20 may be distributed irregularly, that is, the plurality of positioning posts 30 are randomly distributed on the positioning posts 30. Correspondingly, the positioning holes 101 on the restraint frame 10 may also be distributed irregularly.

[0090] By adopting the above technical solution, the cushion pads 20 are inserted into the positioning holes 101 of the restraint frame 10 in a one-to-one correspondence via the multiple positioning posts 30. This, on the one hand, helps to improve the positioning strength and positioning accuracy of the cushion pads 20 on the restraint frame 10, thereby improving the problem of misalignment of the cushion pads 20 on the restraint frame 10. On the other hand, it also helps to improve the assembly strength of the cushion pads 20 on the restraint frame 10, thereby improving the problem of the cushion pads 20 easily falling off the restraint frame 10.

[0091] In some embodiments, please refer to Figures 3 to 5 in conjunction with other figures. Positioning posts 30 are inserted into positioning holes 101 along a first direction Z. The plurality of positioning posts 30 are divided into at least one first positioning post 30a and at least one second positioning post 30b. The cross-sectional area of ​​the first positioning post 30a perpendicular to the first direction Z is greater than the cross-sectional area of ​​the second positioning post 30b perpendicular to the first direction Z.

[0092] As shown in Figures 4 and 5 , among the multiple positioning posts 30, some are first positioning posts 30a, with at least one first positioning post 30a; another portion are second positioning posts 30b, with at least one second positioning post 30b. Correspondingly, among the multiple positioning holes 101, some are first positioning holes 101a, with at least one first positioning hole 101a; another portion are second positioning holes 101b, with at least one second positioning hole 101b. In other words, the multiple positioning holes 101 are divided into at least one first positioning hole 101a and at least one second positioning hole 101b. Each first positioning post 30a is inserted into each first positioning hole 101a, and each second positioning hole 101b is inserted into each second positioning hole 101b.

[0093] The positioning posts 30 are adapted to fit within the positioning holes 101. Specifically, the first positioning post 30a fits within the first positioning hole 101a, while the second positioning post 30b fits within the second positioning hole 101b. The cross-sectional area of ​​the first positioning post 30a, perpendicular to the first direction Z, is greater than the cross-sectional area of ​​the second positioning post 30b, perpendicular to the first direction Z. Accordingly, the diameter of the first positioning hole 101a is greater than the diameter of the second positioning hole 101b. As an example, the positioning posts 30 are cylindrical. The diameter of the first positioning post 30a is greater than the diameter of the second positioning post 30b.

[0094] The positioning column 30 is divided into a first positioning column 30a and a second positioning column 30b of different sizes to be plugged into the positioning holes 101 of corresponding sizes. In this way, when assembling the buffer pad 20, the first positioning column 30a can be plugged into the first positioning hole 101a, and the second positioning column 30b can be plugged into the second positioning hole 101b. This arrangement can improve the positioning strength and positioning accuracy of the buffer pad 20 on the restraint frame 10, thereby improving the problem of misalignment of the buffer pad 20 when assembled on the restraint frame 10. In addition, it is also convenient to position the buffer pad 20 on the restraint frame 10, thereby improving the positioning and assembly efficiency of the buffer pad 20 on the restraint frame 10.

[0095] In some embodiments, please refer to FIG3 to FIG5 together with other drawings. The number of the first positioning post 30a is one, and the number of the second positioning post 30b is multiple.

[0096] 5 , there is one first positioning hole 101a and multiple second positioning holes 101b. The first positioning post 30a is correspondingly plugged into the first positioning hole 101a, and the multiple second positioning posts 30b are plugged into the multiple second positioning holes 101b in a one-to-one correspondence.

[0097] By adopting the above technical solution, when assembling the cushion 20, the first positioning post 30a can be first aligned with the first positioning hole 101a to achieve pre-positioning of the cushion 20 on the restraint frame 10. Then, the position of the cushion 20 can be adjusted so that the plurality of second positioning posts 30b are plugged into the plurality of second positioning holes 101b in a one-to-one correspondence, thereby achieving positioning of the cushion 20 on the restraint frame 10. In this arrangement, the cushion 20 can be pre-positioned on the restraint frame 10 by using the first positioning posts 30a, and the cushion 20 can be quickly positioned on the restraint frame 10, thereby improving the positioning and assembly efficiency of the cushion 20 on the restraint frame 10.

[0098] In some embodiments, please refer to Figures 6 to 9 together, and in combination with other drawings. Among them, Figure 6 is a partial three-dimensional schematic diagram of the restraint structure 100 provided in some embodiments of the present application, Figure 7 is a sectional view of Figure 6 along AA, Figure 8 is a partial enlarged view of Figure 7, and Figure 9 is a decomposition diagram of the structure shown in Figure 8. The positioning column 30 is inserted into the positioning hole 101 along the first direction Z. The positioning column 30 includes a column 31 and a guide portion 32. In the first direction Z, one end of the column 31 is arranged on the buffer pad 20, and the guide portion 32 is connected to the end of the column 31 away from the buffer pad 20. In addition, the outer peripheral wall of the guide portion 32 is arranged to be reduced in the direction away from the buffer pad 20.

[0099] As shown in Figures 6 to 9, the buffer pad 20 is arranged on the side of the restraint frame 10 along the first direction Z. One side of the buffer pad 20 along the first direction Z faces the restraint frame 10, and the side of the buffer pad 20 along the first direction Z away from the restraint frame 10 is used to abut against the battery cell 2000 to restrain the battery cell 2000. The column 31 and the guide portion 32 of the positioning column 30 are arranged in sequence along the first direction Z. Specifically, the column 31 of the positioning column 30 is arranged on the side of the buffer pad 20 along the first direction Z facing the restraint frame 10, and the guide portion 32 is arranged at one end of the column 31 along the first direction Z away from the buffer pad 20.

[0100] The guide portion 32 is arranged to taper along the first direction Z away from the cushion 20 around the axial outer peripheral wall. As an example, the guide portion 32 may be a frustum, the diameter of which gradually decreases along the first direction Z away from the column 31. As an example, the guide portion 32 may be a truncated pyramid, the cross section of which, perpendicular to the first direction Z, gradually decreases along the first direction Z away from the column 31.

[0101] It can be understood that the first positioning post 30 a may include the aforementioned post 31 and guide portion 32 , and the second positioning post 30 b may also include the aforementioned post 31 and guide portion 32 .

[0102] By adopting the above technical solution, during the process of assembling the buffer pad 20 to the restraint frame 10, when the positioning column 30 is inserted into the positioning hole 101, the guide portion 32 of the positioning column 30 is first inserted into the positioning hole 101, and the column body 31 of the positioning column 30 is subsequently inserted into the positioning hole 101. Based on the setting that the outer peripheral wall of the guide portion 32 is tapered in the direction away from the buffer pad 20, when the guide portion 32 is inserted into the positioning hole 101, the guide portion 32 slides along the hole edge of the positioning hole 101 around the axial outer peripheral wall, and can be guided into the positioning hole 101, so that the column body 31 can enter the positioning hole 101. Such a setting enables the positioning column 30 to be guided and inserted into the positioning hole 101, thereby facilitating the positioning of the buffer pad 20 on the restraint frame 10, and also helps to improve the positioning and assembly efficiency of the buffer pad 20 on the restraint frame 10.

[0103] In some embodiments, please refer to Figures 10 and 11 in conjunction with the other figures. Figure 10 is a partial enlarged view of Figure 7, and Figure 11 is an exploded view of the structure shown in Figure 10. In at least one positioning post 30, the end of the guide portion 32 proximal to the post body 31 extends beyond the outer peripheral wall of the post body 31.

[0104] It is understood that at least one positioning post 30 is configured such that an end of the guide portion 32 proximate to the post 31 extends beyond the outer circumferential wall of the post 31 in a direction perpendicular to the first direction Z. That is, a cross-section of the guide portion 32 proximate to the post 31 perpendicular to the first direction Z is larger than a cross-section of the post 31 perpendicular to the first direction Z. As an example, when the post 31 is cylindrical and the guide portion 32 is a frustum, the diameter of the guide portion 32 proximate to the post 31 is larger than the diameter of the post 31.

[0105] In some implementations, as shown in Figures 10 and 11, the second positioning post 30b can be configured such that the end of the guide portion 32 close to the column 31 extends beyond the outer circumferential wall of the column 31. In some implementations, the first positioning post 30a can also be configured such that the end of the guide portion 32 close to the column 31 extends beyond the outer circumferential wall of the column 31.

[0106] By adopting the above technical solution, when the positioning post 30 is inserted into the positioning hole 101, the portion of the guide portion 32 that extends beyond the outer peripheral wall of the post 31 can abut against the restraint frame 10 along the first direction Z, thereby securing the positioning post 30 to the positioning hole 101 of the restraint frame 10. This can improve the assembly strength of the cushion 20 on the restraint frame 10.

[0107] In some embodiments, referring to Figures 10 and 11 together, and in conjunction with other figures, the positioning post 30 is inserted into the positioning hole 101 along the first direction Z. At least one positioning hole 101 includes a first hole segment 1011 and a second hole segment 1012 that are sequentially connected along the first direction Z. The aperture of the second hole segment 1012 is larger than that of the first hole segment 1011. The post 31 is inserted into the first hole segment 1011, and the guide portion 32 is constrained in the second hole segment 1012 along the direction from the second hole segment 1012 to the first hole segment 1011.

[0108] It can be understood that the guide portion 32 is limited to the second hole segment 1012 along the direction of the second hole segment 1012 pointing to the first hole segment 1011 in the first direction Z. It can also be understood that the guide portion 32 is limited to the second hole segment 1012 along the first direction Z toward the first hole segment 1011.

[0109] It should be noted that when the first positioning post 30a is configured such that the end of the guide portion 32 proximate to the column body 31 protrudes beyond the outer peripheral wall of the column body 31, as shown in Figures 10 and 11, the first positioning hole 101a includes the first hole segment 1011 and the second hole segment 1012 sequentially connected along the first direction Z. When the second positioning post 30b is configured such that the end of the guide portion 32 proximate to the column body 31 protrudes beyond the outer peripheral wall of the column body 31, the second positioning hole 101b includes the first hole segment 1011 and the second hole segment 1012 sequentially connected along the first direction Z.

[0110] It should also be noted that, as shown in FIG. 10 and FIG. 11 , the aperture of the second hole segment 1012 is larger than the aperture of the first hole segment 1011 , so that the connection position between the first hole segment 1011 and the second hole segment 1012 forms a step structure.

[0111] As an example, as shown in Figures 8 and 9 , the end of the guide portion 32 of the first positioning post 30a closest to the post 31 does not extend beyond the outer circumferential wall of the post 31. As shown in Figures 10 and 11 , the end of the guide portion 32 closest to the post 31 extends beyond the outer circumferential wall of the post 31, and the second positioning hole 101b includes the aforementioned first hole segment 1011 and second hole segment 1012. For ease of description, this embodiment of the present application uses this example to describe the assembly of the positioning post 30 and positioning hole 101.

[0112] When the second positioning post 30b is inserted into the second positioning hole 101b, the body 31 of the second positioning post 30b is inserted into the first hole section 1011, and the guide portion 32 of the second positioning post 30b is located in the second hole section 1012. Furthermore, the guide portion 32 is positioned along the first direction Z toward the body 31 on the step structure formed between the first hole section 1011 and the second hole section 1012, thereby securing the second positioning post 30b in the second positioning hole 101b.

[0113] By adopting the above technical solution, at least one positioning post 30 can be restrained within the positioning hole 101 by the guide portion 32, thereby securing the positioning post 30 to the restraint frame 10 and thereby improving the fixing strength of the cushion 20 to the restraint frame 10. Furthermore, the guide portion 32 is located within the second hole section 1012, ensuring that the positioning post 30 does not extend beyond the side of the restraint frame 10 away from the cushion 20 along the first direction Z. This allows the cushion 20 to be mounted on both opposing sides of the restraint frame 10 along the first direction Z to restrain the battery cells 2000.

[0114] In some embodiments, please refer to Figures 10 and 11 in conjunction with other figures. In at least one positioning post 30, the end of the guide portion 32 proximal to the post body 31 extends beyond the outer circumferential wall of the post body 31. Furthermore, the positioning post 30 further includes a transition portion 33. The post body 31, transition portion 33, and guide portion 32 are sequentially arranged along a first direction Z. In the first direction Z, the outer circumferential wall of the transition portion 33 gradually decreases from the guide portion 32 toward the post body 31.

[0115] As shown in Figures 10 and 11 , the transition portion 33 is disposed between the column 31 and the guide portion 32 and is respectively connected to the column 31 and the guide portion 32. The transition portion 33 is a portion of the positioning column 30 used to transition between the column 31 and the guide portion 32.

[0116] Based on this, when the positioning post 30 is inserted into the positioning hole 101, the guide portion 32, transition portion 33, and column body 31 of the positioning post 30 sequentially enter the positioning hole 101. When the positioning post 30 is inserted into the positioning hole 101, the transition portion 33 and the guide portion 32 are both located in the second hole section 1012, and the transition portion 33 abuts against the step structure formed between the first hole section 1011 and the second hole section 1012.

[0117] In some implementations, as shown in Figures 10 and 11, on a cross section of the positioning post 30 parallel to the first direction Z, the outer peripheral wall of the guide portion 32 may be an outwardly convex arc surface. Specifically, the outer peripheral wall of the transition portion 33 is provided to protrude radially away from the central axis of the positioning post 30. In other implementations, on a cross section of the positioning post 30 parallel to the first direction Z, the outer peripheral wall of the guide portion 32 may be an inclined surface inclined relative to the first direction Z. Based on this, the transition portion 33 may be a frustum or a prism. In still other implementations, on a cross section of the positioning post 30 parallel to the first direction Z, the outer peripheral wall of the guide portion 32 may be a combination of an inclined surface inclined relative to the first direction Z and an outwardly convex arc surface.

[0118] By providing the transition portion 33 , the guide portion 32 is easily disassembled from the positioning hole 101 , thereby facilitating the disassembly of the positioning post 30 from the positioning hole 101 , and further facilitating the replacement of the buffer pad 20 on the restraint frame 10 .

[0119] In some embodiments, the guide portion 32 of the positioning post 30 can be constructed from an elastic component such as silicone or rubber. This facilitates deformation of the guide portion 32 within the positioning hole 101 and, after resetting, allows the positioning post 30 to be positioned on the restraint frame 10. This facilitates assembly and disassembly of the positioning post 30 from the positioning hole 101. Accordingly, the transition portion 33 of the positioning post 30 can also be constructed from an elastic component such as silicone or rubber. This facilitates deformation of the transition portion 33 and further facilitates assembly and disassembly of the positioning post 30 from the positioning hole 101.

[0120] In some embodiments, the buffer pad 20 and the positioning post 30 are integrally formed.

[0121] This arrangement allows the positioning post 30 to have a cushioning effect, allowing the positioning post 30 to be deformed by compression and smoothly enter and exit the positioning hole 101. This facilitates the assembly and disassembly of the positioning post 30 on the positioning hole 101 and the assembly and disassembly of the buffer pad 20 on the restraint frame 10.

[0122] In some embodiments, please refer to Figures 5 to 7 in conjunction with other figures. Positioning posts 30 are inserted into positioning holes 101 along a first direction Z. The restraint frame 10 includes a frame 11 and a partition 12, which is disposed on the frame 11. The partition 12 is provided with the aforementioned positioning holes 101, and cushioning pads 20 are disposed on opposite sides of the partition 12 along the first direction Z.

[0123] The frame 11 is the framework of the restraint frame 10 and is mainly used for mounting the partition 12 .

[0124] The separator 12 is a plate-like structure. It is primarily used to mount the buffer pad 20 to separate and restrain two adjacent battery cells 2000 along a first direction Z. The thickness of the separator 12 is parallel to the first direction Z. The separator 12 and the frame 11 may be integrally formed or separately connected.

[0125] As shown in Figures 5 to 7 , the separator 12 is provided with cushioning pads 20 on opposite sides along the first direction Z. Therefore, in the first direction Z, the restraint structure 100 abuts against one of the battery cells 2000 via the cushioning pad 20 on one side of the separator 12, thereby jointly restraining the battery cell 2000 with an adjacent restraint structure 100. Furthermore, in the first direction Z, the restraint structure 100 abuts against another battery cell 2000 via the cushioning pad 20 on the other side of the separator 12, thereby jointly restraining the battery cell 2000 with the adjacent restraint structure 100.

[0126] As shown in Figures 5 to 7, the partition 12 is provided with a plurality of positioning holes 101 distributed at intervals. The positioning columns 30 on the buffer pads 20 on opposite sides of the partition 12 can be plugged into and matched with the corresponding positioning holes 101 on the partition 12 to achieve the positioning of the buffer pads 20 on both sides of the partition 12 on the partition 12.

[0127] With such configuration, the restraint structure 100 can be located between two battery cells 2000 adjacent to each other along the first direction Z, so as to restrain the two adjacent battery cells 2000 respectively.

[0128] In some embodiments, please refer to FIG3 to FIG5 together with other drawings. The positioning posts 30 on the buffer pads 20 on opposite sides of the partition 12 are staggered.

[0129] Accordingly, the positioning holes 101 on the partition 12 are divided into two parts. One part of the positioning holes 101 is used to plug and mate with the positioning posts 30 on the buffer pad 20 on one side of the partition 12 along the first direction Z, and the other part of the positioning holes 101 is used to plug and mate with the positioning posts 30 on the buffer pad 20 on the other side of the partition 12. In addition, the two parts of the positioning holes 101 on the partition 12 are staggered.

[0130] As an example, as shown in Figures 3 to 5, the plurality of positioning posts 30 on the buffer pad 20 are distributed in an array, and the center of the array formed by the plurality of positioning posts 30 on the buffer pad 20 is spaced apart from the geometric center of the buffer pad 20. For example, as shown in Figure 4, the center of the array formed by the plurality of positioning posts 30 on the buffer pad 20 is offset relative to the geometric center of the buffer pad 20 along the direction X. In addition, the buffer pads 20 on opposite sides of the partition 12 along the first direction Z have the same structure. Based on this, when two buffer pads 20 are respectively arranged on opposite sides of the partition 12, the directions of the center of the array formed by the positioning posts 30 on the two buffer pads 20 along the direction X are offset in opposite directions, so that the positioning posts 30 on the two buffer pads 20 are staggered along the direction X. Correspondingly, the two parts of the positioning holes 101 on the partition 12 are also staggered along the direction X.

[0131] This arrangement ensures that when the positioning posts 30 on the cushions 20 on opposite sides of the partition 12 along the first direction Z are inserted into the positioning holes 101 on the partition 12, there will be no interference. Based on this, on the one hand, the positioning holes 101 can be configured as through holes that penetrate the partition 12 along the first direction Z. That is, the thickness of the partition 12 can be made very small, which helps reduce the size of the restraint structure 100 along the first direction Z. On the other hand, this facilitates the positioning of the cushions 20 on opposite sides of the partition 12 on the partition 12.

[0132] In some embodiments, please refer to Figures 2 to 4 and Figure 12 in conjunction with other figures. Figure 12 is a perspective schematic diagram of a cushion 20 of a restraint structure 100 provided in some embodiments of the present application. The cushion 20 has a first side surface 201 and a second side surface 202 on opposite sides along a first direction Z. The positioning post 30 is disposed on the first side surface 201. The second side surface 202 is recessed at one or both ends along a second direction Y, with the first direction Z intersecting the second direction Y.

[0133] As shown in Figures 2 to 4 and 12, one side surface of the buffer pad 20 along the first direction Z is a first side surface 201, and the other side surface of the buffer pad 20 along the first direction Z is a second side surface 202. The first side surface 201 and the second side surface 202 are arranged opposite each other along the first direction Z. The first side surface 201 is arranged on a side of the buffer pad 20 close to the separator 12 along the first direction Z and is arranged toward the separator 12 along the first direction Z. The second side surface 202 is arranged on a side of the buffer pad 20 away from the separator 12 along the first direction Z and is used to abut against the battery cell 2000.

[0134] As shown in Figures 2 to 4 and 12 , in the second direction Y, two opposite ends of the second side surface 202 are recessed. In other embodiments, in the second direction Y, one end of the second side surface 202 is recessed.

[0135] It should be noted here that the second direction Y refers to a direction that intersects with the first direction Z. The second direction Y can be the direction Y shown in Figures 2 to 4 and Figure 12, or it can be the direction X, or even a direction that intersects with the first direction Z, direction Y, and direction X respectively. The intersection of the first direction Z and the second direction Y means that the first direction Z and the second direction Y are not parallel, that is, the first direction Z and the second direction Y form an angle greater than 0° and less than 180°. The first direction Z and the second direction Y may be perpendicular to each other, or they may not be perpendicular. The first direction Z and the second direction Y may be directions that intersect on the same plane, or they may be directions on different planes, and the projection of the second direction Y on the plane where the first direction Z is located may intersect with the first direction Z.

[0136] By adopting the above-mentioned technical solution, the compressive stress of the buffer pad 20 on the battery cell 2000 can be concentrated in the middle portion of the buffer pad 20 along the second direction Y. In this way, the buffer pad 20 can better compress and restrain the electrode, diaphragm, and other components inside the battery cell 2000, thereby improving the problem of dents being pressed on the edges of the battery cell 2000 along the second direction Y, thereby improving the restraining effect of the restraint structure 100 on the battery cell 2000. Furthermore, when the battery cell 2000 is placed on the side of the restraint structure 100 along the first direction Z, the battery cell 2000 can slide along the recessed portion of the buffer pad 20. In this way, the buffer pad 20 can guide the battery cell 2000, facilitating the placement of the battery cell 2000 on the side of the restraint structure 100 along the first direction Z, and particularly facilitating the placement of the battery cell 2000 between two adjacent restraint structures 100 along the first direction Z.

[0137] In some embodiments, please refer to Figures 2 to 4 and 12 together, and in combination with other drawings. The second side surface 202 includes a first restraining surface 2021 and a second restraining surface 2022. As shown in Figures 2 to 4 and 12, when the two opposite ends of the buffer pad 20 along the first direction Z are recessed, the opposite ends of the first restraining surface 2021 along the second direction Y both have the above-mentioned second restraining surface 2022, that is, in the second direction Y, the first restraining surface 2021 is located between the two second restraining surfaces 2022. When one end of the buffer pad 20 along the first direction Z is recessed, the second restraining surface 2022 is provided at one end of the first restraining surface 2021 along the second direction Y, that is, the first restraining surface 2021 and the second restraining surface 2022 are distributed in sequence along the second direction Y. Moreover, as shown in Figures 2 to 4 and 12, in the second direction Y, the distance between the second restraining surface 2022 and the first side surface 201 is gradually reduced in the direction away from the first restraining surface 2021.

[0138] It can be understood that the second restraining surface 2022 is recessed relative to the first restraining surface 2021 along the first direction Z. Moreover, the distance between the second restraining surface 2022 and the first side surface 201 along the first direction Z gradually decreases in a direction away from the first restraining surface 2021 .

[0139] In some implementations, on a cross section of the cushion pad 20 perpendicular to the third direction X, the second restraint surface 2022 may be an inclined surface or a curved surface inclined relative to the first direction Z and the second direction Y. In other implementations, on a cross section of the cushion pad 20 perpendicular to the third direction X, the second restraint surface 2022 may be a combination of an inclined surface and a curved surface inclined relative to the first direction Z and the second direction Y. The third direction X is perpendicular to the first direction Z and the second direction Y, and is the direction X shown in the figure.

[0140] This configuration can alleviate the problem of the second restraining surface 2022 denting the edge of the battery cell 2000 along the second direction Y. Furthermore, the second restraining surface 2022 can guide the battery cell 2000, facilitating its placement into the side of the restraining structure 100 along the first direction Z.

[0141] In some embodiments, please refer to Figures 2 to 4, 7 and 12 together with other figures. The second restraining surface 2022 and the extension of the first restraining surface 2021 form an angle less than 45°.

[0142] As shown in Figure 7, on the cross section of the buffer pad 20 perpendicular to the direction X, the first restraint surface 2021 forms an angle β with the second restraint surface 2022 along the extension line of the second direction Y, β is less than 45°, for example, it can be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, etc.

[0143] By adopting the above technical solution, the compression and restraining stress exerted by the portion of the buffer pad 20 on the second restraining surface 2022 on the battery cell 2000 can be reduced, thereby alleviating the problem of the buffer pad 20 causing dents on the edges of the battery cell 2000 along the second direction Y. Furthermore, the portion of the buffer pad 20 on the second restraining surface 2022 can still provide a certain restraining stress on the battery cell 2000, thereby enhancing the restraining effect of the restraint structure 100 on the battery cell 2000.

[0144] In some embodiments, please refer to FIG. 2 and FIG. 3 together with other figures. The restraint structure 100 further includes an isolation film 40 , which covers the buffer pad 20 to separate the buffer pad 20 from the battery cell 2000 .

[0145] The isolation film 40 refers to a film material capable of isolating the buffer pad 20 and the battery cell 2000. The isolation film 40 can be a Mylar film or other types of film materials.

[0146] The isolation film 40 is disposed away from the positioning post 30 .

[0147] By adopting the above technical solution, the isolation film 40 can isolate the buffer pad 20 and the battery cell 2000. On the one hand, it can improve the problem of the buffer pad 20 adhering to the battery cell 2000. On the other hand, it can improve the problem of contaminants generated by the extrusion of the buffer pad 20 remaining on the battery cell 2000.

[0148] Based on the above concept, referring to FIG. 1 and in combination with other drawings, an embodiment of the present application further provides a battery restraint device 1000, which includes a restraint structure 100. The restraint structure 100 in this embodiment is the same as the restraint structure 100 in the previous embodiment. For details, please refer to the relevant description of the restraint structure 100 in the previous embodiment, which will not be repeated here.

[0149] The battery restraint device 1000 provided in the embodiment of the present application, by adopting the restraint structure 100 involved in the above embodiments, can improve the problem of misalignment of the buffer pad 20 on the restraint frame 10, which is beneficial to improving the restraint effect of the battery restraint device 1000 on the battery cell 2000.

[0150] As one of the embodiments of the present application, as shown in Figures 2 to 11, the restraint structure 100 includes a restraint frame 10 and two buffer pads 20. The restraint frame 10 includes a frame body 11 and a partition 12 arranged on the frame body 11, and the partition 12 is provided with a plurality of positioning holes 101 distributed at intervals. The two buffer pads 20 are respectively arranged on opposite sides of the partition 12 along the first direction Z. The buffer pad 20 is provided with a first positioning column 30a and a plurality of second positioning columns 30b distributed at intervals. The diameter of the first positioning column 30a is larger than the diameter of the second positioning column 30b, and the first positioning column 30a and the second positioning column 30b are distributed at intervals. The positioning holes 101 on the partition 12 are divided into a first positioning hole 101a and a second positioning hole 101b. The first positioning column 30a is inserted into the first positioning hole 101a along the first direction Z, and the second positioning column 30b is inserted into the second positioning hole 101b along the first direction Z. The second positioning post 30b includes a post 31, a transition portion 33, and a guide portion 32, arranged in sequence along the first direction Z. The diameter of the guide portion 32 at one end closer to the post 31 along the first direction Z is larger than the diameter of the post 31, and the diameter of the transition portion 33 gradually decreases from the guide portion 32 toward the post 31. The second positioning hole 101b includes a first hole section 1011 and a second hole section 1012, which are connected in sequence along the first direction Z. The diameter of the second hole section 1012 is larger than the diameter of the first hole section 1011. The post 31 is inserted into the first hole section 1011. The transition portion 33 and the guide portion 32 are located in the second hole section 1012 and are confined to the second hole section 1012 along the first direction Z toward the buffer pad 20 where the positioning post 30 is located. The outer peripheral wall of the guide portion 32 is tapered away from the post 31 along the first direction Z. In addition, the positioning hole 101 on the partition 12 is divided into two parts, one part is used to plug and cooperate with the positioning column 30 on one side of the partition 12, and the other part is used to plug and cooperate with the positioning column 30 on the other side of the partition 12, and the two parts of the positioning holes 101 are staggered.

[0151] The above are merely optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included within the scope of the claims of the present application.

Claims

1. A restraint structure (100), wherein: include: The restraint frame (10) is provided with a positioning hole (101); A buffer pad (20) is arranged on the restraint frame (10); A positioning column (30) is arranged on the buffer pad (20) and is plugged into and matched with the positioning hole (101).

2. The restraint structure (100) according to claim 1, wherein: There are a plurality of positioning posts (30), and the plurality of positioning posts (30) are spaced apart and distributed on the buffer pad (20); the restraint frame (10) is provided with a plurality of spaced apart positioning holes (101), and each positioning post (30) is plugged into and matched with each positioning hole (101).

3. The restraint structure (100) according to claim 2, wherein: The plurality of positioning posts (30) on the buffer pad (20) are distributed in an array.

4. The restraint structure (100) according to claim 2 or 3, wherein: The positioning column (30) is inserted into the positioning hole (101) along a first direction (Z); the plurality of positioning columns (30) are divided into at least one first positioning column (30a) and at least one second positioning column (30b); the cross-sectional area of ​​the first positioning column (30a) perpendicular to the first direction (Z) is greater than the cross-sectional area of ​​the second positioning column (30b) perpendicular to the first direction (Z).

5. The restraint structure (100) according to claim 4, wherein: The number of the first positioning column (30a) is one, and the number of the second positioning column (30b) is multiple.

6. The restraint structure (100) according to any one of claims 1 to 5, wherein: The positioning column (30) is inserted into the positioning hole (101) along a first direction (Z); the positioning column (30) comprises a column body (31) and a guide portion (32); in the first direction (Z), one end of the column body (31) is arranged on the buffer pad (20), the guide portion (32) is connected to an end of the column body (31) away from the buffer pad (20), and the outer peripheral wall of the guide portion (32) is arranged to be reduced in a direction away from the buffer pad (20).

7. The restraint structure (100) according to claim 6, wherein: In at least one of the positioning columns (32), one end of the guide portion (32) close to the column body (31) protrudes outside the outer peripheral wall of the column body (31).

8. The restraint structure (100) according to claim 7, wherein: The positioning column (30) is inserted into the positioning hole (101) along a first direction (Z); at least one of the positioning holes (101) comprises a first hole section (1011) and a second hole section (1012) which are sequentially connected along the first (Z) direction, and the aperture of the second hole section (1012) is larger than the aperture of the first hole section (1011); the column body (31) is inserted into the first hole section (1011), and the guide portion (32) is limited in the second hole section (1012) along the direction from the second hole section (1012) to the first hole section (1011).

9. The restraint structure (100) according to any one of claims 6 to 8, wherein: At least one of the positioning columns (30) further comprises a transition portion (33); the column body (31), the transition portion (33) and the guide portion (32) are arranged in sequence along the first direction (Z); an end of the guide portion (32) close to the column body (31) protrudes outside the outer peripheral wall of the column body (31); and the outer peripheral wall of the transition portion (33) is gradually reduced from the guide portion (32) toward the column body (31).

10. The restraint structure (100) according to any one of claims 5 to 9, wherein: On a cross section of the positioning column (30) parallel to the first direction (Z), the outer peripheral wall of the guide portion (32) is arranged as an outwardly convex arc surface, or the outer peripheral wall of the guide portion (32) is arranged as an inclined surface inclined relative to the first direction (Z), or the outer peripheral wall of the guide portion (32) is arranged as a combination of an inclined surface inclined relative to the first direction (Z) and an outwardly convex arc surface.

11. The restraint structure (100) according to any one of claims 1 to 10, wherein: The buffer pad (20) and the positioning column (30) are integrally formed.

12. The restraint structure (100) according to any one of claims 1 to 11, wherein: The positioning column (33) is inserted into the positioning hole (101) along a first direction (Z); the restraint frame (10) comprises a frame body (11) and a partition (12) arranged on the frame body (11), the partition (12) is provided with the positioning hole (101), and the buffer pads (20) are arranged on opposite sides of the partition (12) along the first direction (Z).

13. The restraint structure (100) according to claim 12, wherein: The positioning posts (30) on the buffer pads (20) on opposite sides of the partition (12) are arranged in a staggered manner.

14. The restraint structure (100) according to any one of claims 1 to 13, wherein: The buffer pad (20) is provided with a first side surface (201) and a second side surface (202) on opposite sides along a first direction (Z), respectively; the positioning column (30) is arranged on the first side surface (201) and inserted into the positioning hole (101) along the first direction (Z); the second side surface (202) is recessed at one end or both ends along a second direction (Y), and the first direction (Z) intersects with the second direction (Y).

15. The restraint structure (100) of claim 14, wherein: The second side surface (202) comprises a first restraint surface (2021) and a second restraint surface (2022) provided at one end or both ends of the first restraint surface (2022) along the second direction (Y); in the second direction (Y), the distance between the second restraint surface (2022) and the first side surface (2021) is gradually reduced in a direction away from the first restraint surface (2021).

16. The restraint structure (100) of claim 15, wherein: On a cross section of the buffer pad (20) perpendicular to a third direction (X), the second restraint surface (2022) is an inclined surface or an arc surface inclined relative to the first direction (Z) and the second direction (Y), and the third direction (X) is perpendicular to the first direction (Z) and the second direction (Y).

17. The restraint structure (100) according to claim 15 or 16, wherein: The second restraint surface (2022) and the extension surface of the first restraint surface (2021) form an angle less than 45°.

18. The restraint structure (100) according to any one of claims 1 to 17, wherein: The restraint structure (1) further comprises an isolation film (40), wherein the isolation film (40) is coated on the buffer pad (20) to separate the buffer pad (20) and the battery cell (2000).

19. A battery restraint device (1000), wherein: Comprising a restraint structure (100) according to any one of claims 1-18.

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