Separator and battery containment tray

Abstract

This application relates to the field of battery manufacturing technology and provides a separator and a battery restraint tray. The separator of this application is disposed in a battery restraint tray. The separator includes a separator body, and at least one side of the separator body in the thickness direction has a first planar portion and a second planar portion. The second planar portion is disposed circumferentially to the first planar portion, and the first planar portion protrudes relative to the second planar portion in the thickness direction. An elastic connecting member is provided between the first and second planar portions. The elastic connecting member has an arcuate portion, which abuts against the large surface of the battery with the first planar portion. In the thickness direction, the arcuate portion protrudes relative to the first planar portion, and compression of the arcuate portion can transitionally connect the first and second planar portions. The separator of this application can make full contact with the large surface of the battery, and in particular, it can achieve adaptive and uniform flexible restraint of the edge area of ​​the large surface of the battery, thereby improving the battery restraint effect and enhancing the battery manufacturing quality.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a separator and a battery restraint tray. Background Technology

[0002] As the market demands for battery energy density continue to increase, silicon carbon anode materials, due to their high energy density and excellent fast-charging performance, have shown broad application prospects in the field of lithium-ion batteries.

[0003] During battery research and development and production, it has been found that increasing the silicon doping ratio exacerbates gas generation during the pre-charge (or formation) stage. In this stage, a restraint tray is typically used to apply external pressure to the cell to improve its electrochemical performance.

[0004] However, most common trays currently use a one-piece molded plate structure, which is in rigid contact with the battery casing. Due to the high hardness of both materials and the presence of edges around the battery casing, the electrode assembly cannot be fully restrained, resulting in insufficient interface adhesion. This leads to defects such as lithium plating and black spots at the interface, affecting battery quality and safety. Summary of the Invention

[0005] In view of this, the present application aims to provide a separator to improve the battery restraint effect.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] A separator is disposed in a battery restraint tray. The separator includes a separator body. At least one side of the separator body in the thickness direction is provided with a first planar portion and a second planar portion. The second planar portion is disposed in the circumferential direction of the first planar portion. The first planar portion protrudes relative to the second planar portion in the thickness direction.

[0008] An elastic connector is provided between the first planar portion and the second planar portion. The elastic connector has an arc-shaped portion. The arc-shaped portion and the first planar portion are used to abut against the large surface of the battery. In the thickness direction, the arc-shaped portion protrudes relative to the first planar portion, and the arc-shaped portion can be compressed to transition and connect the first planar portion and the second planar portion.

[0009] Furthermore, a U-shaped mounting groove is provided between the first planar portion and the second planar portion, and the elastic connector is embedded in the mounting groove.

[0010] Furthermore, an adhesive layer is provided between the elastic connector and the mounting groove.

[0011] Furthermore, the partition body has a first direction and a second direction orthogonally arranged; the arcuate surface includes two first parts arranged opposite to each other along the first direction and two second parts arranged opposite to each other along the second direction, and adjacent first parts and second parts are connected; the dimension L1 of the first part in the first direction is between 20mm and 40mm, and the dimension L2 of the second part in the second direction is between 20mm and 40mm.

[0012] Furthermore, in the first direction, each of the first portions has a first rounded corner formed on the side closest to the first planar portion, and each of the first portions has a second rounded corner formed on the side furthest from the second planar portion; the radius R1 of the first rounded corner is between 0.5mm and 2mm, and the radius R2 of the second rounded corner is between 50mm and 200mm.

[0013] Furthermore, in the second direction, each of the second portions has a third rounded corner formed on the side closer to the first planar portion, and each of the second portions has a fourth rounded corner formed on the side farther from the first planar portion; the radius R3 of the third rounded corner is between 0.5mm and 2mm, and the radius R4 of the fourth rounded corner is between 50mm and 200mm.

[0014] Furthermore, on the projection planes of the first and second directions, the sum of the projected areas of the arcuate portion and the first planar portion is less than the area of ​​the large surface; in the first direction, the distance H1 between the edge of each first portion away from the first planar portion and the edge corresponding to the large surface of the battery is between 1mm and 5mm, and / or, in the second direction, the distance H2 between the edge of each second portion away from the first planar portion and the edge corresponding to the large surface of the battery is between 1mm and 5mm.

[0015] Furthermore, in the thickness direction, the distance D between the arcuate portion and the first planar portion is between 0.5 mm and 2 mm.

[0016] Furthermore, the partition body is made of metal, and the elastic connector is made of silicone foam or rubber.

[0017] Compared with related technologies, this application has the following advantages:

[0018] (1) The separator described in this application, through the elastic connector provided between the first flat part and the second flat part, makes the arc-shaped part on the elastic connector and the first flat part abut against the large surface of the battery. In this way, when the battery is restrained by two separators, the first flat part provides restraint force to the main part of the large surface, and the elasticity of the arc-shaped part provides edge restraint to the circumferential edge of the large surface. This can ensure full contact with the large surface of the battery, and in particular, can achieve adaptive and uniform flexible restraint of the edge area of ​​the large surface of the battery, thereby improving the battery restraint effect and improving the quality of battery manufacturing.

[0019] (2) A U-shaped mounting groove is provided between the first flat part and the second flat part, which can provide a more accurate installation position for the elastic connector, making it easier to install the elastic connector and maintain and replace it later.

[0020] (3) Setting an adhesive layer between the elastic connector and the mounting groove can enhance the reliability of the connection between the elastic connector and the partition plate.

[0021] (4) The curved surface includes two first parts and two second parts. The adjacent first and second parts are connected to form a rectangle, and the dimensions of the first part in the first direction and the dimensions of the second part in the second direction are defined. This can better match the force requirements around the battery surface, avoid damage to the battery casing edge, and better constrain the edge of the electrode assembly.

[0022] (5) The first part is provided with a first rounded corner and a second rounded corner on both sides of the first direction, and the radius of the first rounded corner and the second rounded corner is limited. In this way, the stress concentration between the first flat part and the first part can be avoided by using the first rounded corner, and the contour change of the arc surface can be smoothed by using the second rounded corner. When the arc surface is compressed, the internal stress concentration of the elastic connector can be reduced, and at the same time, the adaptive flexible restraint of the edge area of ​​the battery surface can be achieved.

[0023] (6) The second part is provided with a third fillet and a fourth fillet on both sides of the second direction, and the fillet radii of the third fillet and the fourth fillet are limited. In this way, the third fillet can avoid stress concentration between the first flat part and the second part, and the fourth fillet can make the contour change of the arc surface smooth. When the arc surface is compressed, the internal stress concentration of the elastic connector can also be reduced, and at the same time, the adaptive flexible restraint of the edge area of ​​the battery can be achieved.

[0024] (7) The total area of ​​the curved part and the first flat part is less than the area of ​​the large surface of the battery. At the same time, the distance H1 between the edge of the first part away from the first flat part and the corresponding edge of the large surface of the battery is limited, and the distance H2 between the edge of the second part away from the first flat part and the corresponding edge of the large surface of the battery is limited. This ensures that the pressure area of ​​the separator is concentrated in the area of ​​the battery housing that needs the most support, ensuring the restraint effect of the electrode group, and also avoiding hard contact between the rigid part of the separator and the edge of the battery housing.

[0025] (8) Limiting the distance between the curved part and the first flat part in the thickness direction allows the elastic connector to have sufficient compression and prevents the first flat part from being unable to effectively participate in the restraint of the battery surface due to excessive protrusion of the curved part.

[0026] (9) The partition body is made of metal material, which can make the partition body have sufficient strength and improve the structural stability of the partition. The elastic connector is made of silicone foam or rubber, which can have good compression resilience and provide gentler compression characteristics.

[0027] Another object of this application is to provide a battery restraint tray, including a tray body and a partition as described above; the partitions are a plurality of partitions arranged at intervals on the tray body, and the spacing between two adjacent partitions is adjustable.

[0028] The battery restraint tray described in this application, and the separator described above, have the same technical effects as the prior art, and will not be repeated here. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a first-view structural schematic diagram of the partition described in an embodiment of this application;

[0031] Figure 2 This is a second-view structural schematic diagram of the partition described in an embodiment of this application;

[0032] Figure 3 for Figure 2 AA-view sectional view;

[0033] Figure 4 for Figure 2 BB view section view;

[0034] Figure 5 This is a first-view structural schematic diagram of the partition body described in an embodiment of this application;

[0035] Figure 6 This is a structural schematic diagram of the partition body described in the embodiments of this application from a second perspective;

[0036] Figure 7 This is a schematic diagram of the structure of the separator and the battery surface in the embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Partition body;

[0039] 101. First planar portion; 102. Second planar portion; 103. Mounting slot;

[0040] 2. Flexible connectors;

[0041] 201. Curved surface; 2011. Part 1; 2012. Part 2. Detailed Implementation

[0042] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0046] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0048] An embodiment of the first aspect of this application provides a separator to improve the restraint effect of the battery.

[0049] In related technologies, as the market demand for battery energy density continues to increase, silicon carbon anode materials have shown broad application prospects in the field of lithium-ion batteries due to their high energy density and excellent fast charging performance.

[0050] During battery research and development and production, it has been found that increasing the silicon doping ratio exacerbates gas generation during the pre-charge (or formation) stage. In this stage, a restraint tray is typically used to apply external pressure to the cell to improve its electrochemical performance.

[0051] However, most common trays currently use a one-piece molded plate structure, which is in rigid contact with the battery casing. Due to the high hardness of both materials and the presence of edges around the battery casing, the electrode assembly cannot be properly restrained, resulting in insufficient interface adhesion. This leads to defects such as dotted lithium plating and black spots around the electrode, affecting battery quality and safety.

[0052] In view of this, in order to overcome the shortcomings of related technologies, the partition in this embodiment incorporates... Figures 1 to 7 As shown, the overall design includes a partition body 1. At least one side of the partition body 1 in the thickness direction is provided with a first flat portion 101 and a second flat portion 102. The second flat portion 102 is disposed in the circumferential direction of the first flat portion 101. The first flat portion 101 protrudes relative to the second flat portion 102 in the thickness direction.

[0053] Furthermore, an elastic connector 2 is provided between the first planar portion 101 and the second planar portion 102. The elastic connector 2 has an arcuate portion 201, which is used to abut against the large surface of the battery with the first planar portion 101. In the thickness direction, the arcuate portion 201 protrudes relative to the first planar portion 101, and the arcuate portion 201 can be compressed to transitionally connect the first planar portion 101 and the second planar portion 102.

[0054] In this structure, the elastic connector 2, located between the first planar portion 101 and the second planar portion 102, allows the arcuate portion 201 on the elastic connector 2 to abut against the large surface of the battery with the first planar portion 101. Thus, when the battery is restrained by two separators, the first planar portion 101 provides restraint force to the main part of the large surface of the battery, and the elasticity of the arcuate portion 201 provides edge restraint to the circumferential edge of the large surface. This ensures sufficient contact with the large surface of the battery, and in particular, enables adaptive and uniform flexible restraint of the edge area of ​​the large surface of the battery, thereby improving the battery restraint effect and improving the quality of battery manufacturing.

[0055] Based on the above overview, specifically, it should first be noted that the separators in this embodiment are used to constrain the large surfaces of the battery. The battery has a bottom surface and a top surface, as well as two opposing large surfaces and two opposing narrow surfaces connected between the bottom and top surfaces. In practice, the battery is sandwiched between the two separators, which abut against the two large surfaces of the battery, thereby applying a constraining force to the battery.

[0056] Additionally, it should be noted that the aforementioned first planar portion 101, second planar portion 102, and elastic connector 2 can be provided only on one side of the separator body 1 in the thickness direction, or they can be provided on both sides of the separator body 1 in the thickness direction, depending on the location of the separator. For example, when the separator is located at the end of the battery restraint platform, the first planar portion 101, second planar portion 102, and elastic connector 2 can be provided only on the side of the separator body 1 facing the battery. When the separator is located at other positions besides the end of the battery restraint platform, that is, when the battery is restrained on both sides of the separator, the first planar portion 101, second planar portion 102, and elastic connector 2 are provided on both sides of the separator body 1.

[0057] In some exemplary embodiments, for example, the partition body 1 is made of a metal material, and the elastic connector 2 is made of silicone foam or rubber. The metal material can be, for example, carbon steel, stainless steel, alloy steel, etc. When the elastic connector 2 is made of silicone foam, TH700 silicone foam can be used, for example. Furthermore, the Shore A hardness of the elastic connector 2 can be, for example, less than 60A, using rubber or silicone foam material.

[0058] In the above configuration, the partition body 1 is made of metal, which gives it sufficient strength and improves the structural stability of the partition. The elastic connector 2 is made of silicone foam or rubber, which provides good compression resilience and gentler compression characteristics.

[0059] Combination Figures 1 to 6 As shown, in some exemplary embodiments, for example, a U-shaped mounting groove 103 is provided between the first planar portion 101 and the second planar portion 102, and the elastic connector 2 is embedded in the mounting groove 103. In this case, providing the U-shaped mounting groove 103 can provide a more precise installation position for the elastic connector 2, which facilitates the installation and subsequent maintenance and replacement of the elastic connector 2.

[0060] Based on the installation groove 103, as a feasible implementation, for example, an adhesive layer is provided between the elastic connector 2 and the installation groove 103, and the elastic connector 2 is bonded to the installation groove 103 by the adhesive layer. This bonding connection between the elastic connector 2 and the installation groove 103 enhances the reliability of the connection between the elastic connector 2 and the partition plate.

[0061] Continue to refer to Figures 1 to 6 As shown, the partition body 1 has a first direction and a second direction orthogonally arranged. The curved surface 201 includes two first portions 2011 arranged opposite each other along the first direction and two second portions 2012 arranged opposite each other along the second direction. Adjacent first portions 2011 and second portions 2012 are connected, such that the first portions 2011 and second portions 2012 are connected end to end to form a rectangle. In some exemplary embodiments, for example, the dimension L1 of the first portion 2011 in the first direction is between 20mm and 40mm, and the dimension L2 of the second portion 2012 in the second direction is between 20mm and 40mm.

[0062] In specific implementation, the dimension L1 of the first part 2011 in the first direction can be set to, for example, 20mm, 23mm, 25mm, 27mm, 30mm, 32mm, 35mm, 37mm, or 40mm. The dimension L2 of the second part 2012 in the second direction can also be set to, for example, 20mm, 23mm, 25mm, 27mm, 30mm, 32mm, 35mm, 37mm, or 40mm. Dimensions L1 and L2 can be equal or unequal; preferably, dimensions L1 and L2 use the same value to facilitate manufacturing.

[0063] In the above implementation, by limiting the dimensions of the first part 2011 in the first direction and the second part 2012 in the second direction, the force requirements around the large surface of the battery can be better matched, avoiding damage to the edge of the battery casing while better restraining the edge of the electrode assembly.

[0064] It is worth noting that the first direction of the partition body 1 can be the height direction of the partition body 1, and the second direction can be the length direction of the partition body 1. Of course, the first direction of the partition body 1 can also be the length direction of the partition body 1, in which case the second direction is the height direction of the partition body 1.

[0065] When the first direction is the height direction of the separator body 1, it may correspond to the height direction of the battery, for example. In this case, the second direction is the length direction of the separator body 1, which may also correspond to the length direction of the battery. When the first direction is the length direction of the separator body 1, it may correspond to the length direction of the battery, for example. In this case, the second direction is the height direction of the separator body 1, which may also correspond to the height direction of the battery.

[0066] Reference Figure 2 and Figure 3 As shown, in some exemplary embodiments, for example, in the first direction, each first portion 2011 has a first rounded corner on the side near the first flat portion 101, and each first portion 2011 has a second rounded corner on the side away from the second flat portion 102. The radius R1 of the first rounded corner is between 0.5mm and 2mm, and the radius R2 of the second rounded corner is between 50mm and 200mm. This configuration, by utilizing the first rounded corner, avoids stress concentration at the position between the first flat portion 101 and the first portion 2011. By utilizing the second rounded corner, the contour change of the curved portion 201 is made smoother. When the curved portion 201 is compressed, the internal stress concentration of the elastic connector 2 can be reduced, while achieving adaptive flexible restraint of the large edge area of ​​the battery.

[0067] In practice, the radius R1 of the first fillet can be set to, for example, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm, or 2mm. The radius R2 of the second fillet can be set to, for example, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, or 200mm.

[0068] Based on the defined fillet radii of the first and second fillets, see... Figure 2 and Figure 4As shown, in some exemplary embodiments, for example, in the second direction, each second portion 2012 has a third rounded corner on the side near the first flat portion 101, and each second portion 2012 has a fourth rounded corner on the side away from the first flat portion 101. The radius R3 of the third rounded corner is between 0.5 mm and 2 mm, and the radius R4 of the fourth rounded corner is between 50 mm and 200 mm.

[0069] At this time, the second part 2012 is provided with a third fillet and a fourth fillet on both sides of the second direction, and the fillet radii of the third fillet and the fourth fillet are respectively limited. In this way, the stress concentration between the first flat part 101 and the second part 2012 can be avoided by using the third fillet, and the contour change of the arc part 201 can be smoothed by using the fourth fillet. When the arc part 201 is compressed, the internal stress concentration of the elastic connector 2 can also be reduced. At the same time, adaptive flexible restraint of the edge area of ​​the battery can also be achieved.

[0070] Furthermore, in specific implementations, the radius R3 of the third fillet can be set to, for example, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm, or 2mm, etc. The radius R4 of the fourth fillet can be set to, for example, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, or 200mm, etc.

[0071] Furthermore, it is worth noting that the fillet radius R1 of the first rounded corner and the fillet radius R3 of the third rounded corner can be the same or different, and the fillet radius R2 of the second rounded corner and the fillet radius R4 of the fourth rounded corner can be the same or different. In this embodiment, as a preferred embodiment, the fillet radius R1 of the first rounded corner and the fillet radius R3 of the third rounded corner are the same, and the fillet radius R2 of the second rounded corner and the fillet radius R4 of the fourth rounded corner are the same. This makes the structure of the elastic connector 2 symmetrical, the structure relatively simple, and easy to manufacture.

[0072] In some exemplary embodiments, for example, on the projection planes of the first and second directions, the sum of the projected areas of the curved portion 201 and the first flat portion 101 is less than the area of ​​the large surface. In the first direction, the distance H1 between the edge of each first portion 2011 away from the first flat portion 101 and the edge corresponding to the large surface of the battery is between 1 mm and 5 mm. Meanwhile, in the second direction, the distance H2 between the edge of each second portion 2012 away from the first flat portion 101 and the edge corresponding to the large surface of the battery is between 1 mm and 5 mm.

[0073] Reference Figure 7As shown, Figure 7 The dashed lines in the diagram illustrate the projection of the battery's large surface onto the separator. The edges of each first portion 2011 away from the first planar portion 101 correspond to and are adjacent to the two side edges along the length direction of the battery's large surface. The edges of each second portion 2012 away from the second planar portion 102 correspond to and are adjacent to the two side edges along the height direction of the battery's large surface. The distances H1 and H2 are as follows: Figure 7 As shown in the image.

[0074] In specific implementations, the distance H1 between the edge of each first part 2011 away from the first flat part 101 and the edge corresponding to the large surface of the battery can be set to, for example, 1mm, 2mm, 3mm, 4mm, or 5mm. The distance H2 between the edge of each second part 2012 away from the first flat part 101 and the edge corresponding to the large surface of the battery can also be set to, for example, 1mm, 2mm, 3mm, 4mm, or 5mm.

[0075] In this embodiment, distances H1 and H2 can be set to the same value or different values. Preferably, they are set to the same value.

[0076] In the above embodiment, by limiting the total area of ​​the curved surface 201 and the first flat surface 101 to be smaller than the area of ​​the large surface of the battery, and by limiting the distance H1 between the edge of the first part 2011 away from the first flat surface 101 and the corresponding edge of the large surface of the battery, and by limiting the distance H2 between the edge of the second part 2012 away from the first flat surface 101 and the corresponding edge of the large surface of the battery, it can be ensured that the pressure area of ​​the separator is concentrated in the area of ​​the battery casing that needs the most support, ensuring the restraint effect of the electrode group, and at the same time avoiding hard contact between the rigid part of the separator and the edge of the battery casing.

[0077] Additionally, refer to Figure 2 and Figure 4 As shown, in some exemplary embodiments, for example, the distance D between the curved portion 201 and the first flat portion 101 in the thickness direction is between 0.5 mm and 2 mm. By limiting the distance between the curved portion 201 and the first flat portion 101 in the thickness direction, the elastic connector 2 can have sufficient compression and can prevent the curved portion 201 from protruding too much, which would prevent the first flat portion from being unable to effectively participate in the restraint of the battery surface.

[0078] It is worth noting that, regarding the partition in this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 7As shown, it may include, for example, a partition body 1, with a first planar portion 101 and a second planar portion 102 provided on at least one side in the thickness direction of the partition body 1. The second planar portion 102 is disposed in the circumferential direction of the first planar portion 101, and the first planar portion 101 protrudes relative to the second planar portion 102 in the thickness direction.

[0079] Furthermore, an elastic connector 2 is provided between the first planar portion 101 and the second planar portion 102. The elastic connector 2 has an arcuate portion 201, which is used to abut against the large surface of the battery with the first planar portion 101. In the thickness direction, the arcuate portion 201 protrudes relative to the first planar portion 101, and the arcuate portion 201 can be compressed to transitionally connect the first planar portion 101 and the second planar portion 102.

[0080] The partition body 1 is made of metal, and the elastic connector 2 is made of silicone foam or rubber. Furthermore, in the thickness direction, the distance D between the curved surface 201 and the first flat surface 101 is between 0.5mm and 2mm.

[0081] A U-shaped mounting groove 103 is provided between the first flat portion 101 and the second flat portion 102, and the elastic connector 2 is embedded in the mounting groove 103. Furthermore, the elastic connector 2 is bonded to the mounting groove 103.

[0082] The partition body 1 has a first direction and a second direction orthogonally arranged. The arc-shaped surface 201 includes two first parts 2011 arranged opposite each other along the first direction and two second parts 2012 arranged opposite each other along the second direction. Adjacent first parts 2011 and second parts 2012 are connected. The dimension L1 of the first part 2011 in the first direction is 30mm, and the dimension L2 of the second part 2012 in the second direction is 30mm.

[0083] In the first direction, each first portion 2011 has a first rounded corner on the side closest to the first flat portion 101, and each first portion 2011 has a second rounded corner on the side furthest from the second flat portion 102. Furthermore, in the second direction, each second portion 2012 has a third rounded corner on the side closest to the first flat portion 101, and each second portion 2012 has a fourth rounded corner on the side furthest from the first flat portion 101.

[0084] In the projection planes of the first and second directions, the sum of the projected areas of the curved portion 201 and the first flat portion 101 is less than the area of ​​the large surface. In the first direction, the distance H1 between the edge of each first portion 2011 away from the first flat portion 101 and the edge corresponding to the large surface of the battery is 3 mm. In the second direction, the distance H2 between the edge of each second portion 2012 away from the first flat portion 101 and the edge corresponding to the large surface of the battery is also 3 mm.

[0085] In the preferred embodiment of the partition above, the specific configuration and arrangement of the first flat portion 101, the second flat portion 102, and the elastic connector 2 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the first flat portion 101, the second flat portion 102, and the elastic connector 2 can also be referred to the descriptions in the above exemplary embodiments.

[0086] The separator in this embodiment adopts the above design. By using the elastic connector 2 provided between the first flat part 101 and the second flat part 102, it can make full contact with the large surface of the battery when confining the battery. In particular, it can achieve adaptive and uniform flexible confinement of the edge area of ​​the large surface of the battery, thereby improving the battery confinement effect and improving the battery manufacturing quality.

[0087] An embodiment of the second aspect of this application provides a battery restraint tray, which includes a tray body and partitions as described above. The partitions are a plurality of spaced-apart partitions arranged on the tray body, and the spacing between adjacent partitions is adjustable. Specifically, for example, each partition is movably disposed on the tray body, forming an accommodating space for a battery between adjacent partitions, and the two partitions are used to clamp the large surface of the battery.

[0088] It should be noted that the connection between the battery restraint tray body and the partition, as well as other related structures in the tray body, can be set with reference to the relevant structures in existing battery restraint trays, and will not be described in detail here.

[0089] The battery restraint tray of this embodiment, by adopting the above-mentioned partition, can ensure full contact with the large surface of the battery. In particular, it can achieve adaptive and uniform flexible restraint of the edge area of ​​the large surface of the battery, thereby improving the battery restraint effect and improving the quality of battery manufacturing.

[0090] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A separator disposed in a battery restraint tray, characterized in that: The partition includes a partition body, and at least one side of the partition body in the thickness direction is provided with a first planar portion and a second planar portion. The second planar portion is disposed in the circumferential direction of the first planar portion, and the first planar portion protrudes relative to the second planar portion in the thickness direction. An elastic connector is provided between the first planar portion and the second planar portion. The elastic connector has an arc-shaped portion. The arc-shaped portion and the first planar portion are used to abut against the large surface of the battery. In the thickness direction, the arc-shaped portion protrudes relative to the first planar portion, and the arc-shaped portion can be compressed to transitionally connect the first planar portion and the second planar portion. In the thickness direction, the distance D between the arcuate portion and the first planar portion is between 0.5 mm and 2 mm.

2. The partition according to claim 1, characterized in that: A U-shaped mounting groove is provided between the first planar portion and the second planar portion, and the elastic connector is embedded in the mounting groove.

3. The partition according to claim 2, characterized in that: An adhesive layer is provided between the elastic connector and the mounting groove.

4. The partition according to claim 2, characterized in that: The partition body has a first direction and a second direction that are orthogonally arranged; The arcuate surface includes two first portions arranged opposite each other along the first direction, and two second portions arranged opposite each other along the second direction, with adjacent first portions and second portions connected together; The first part has a dimension L1 in the first direction that is between 20mm and 40mm, and the second part has a dimension L2 in the second direction that is between 20mm and 40mm.

5. The partition according to claim 4, characterized in that: In the first direction, each of the first portions has a first rounded corner formed on the side closer to the first planar portion, and each of the first portions has a second rounded corner formed on the side farther from the second planar portion; The radius of the first fillet, R1, is between 0.5mm and 2mm, and the radius of the second fillet, R2, is between 50mm and 200mm.

6. The partition according to claim 4, characterized in that: In the second direction, each of the second portions has a third rounded corner on the side closer to the first planar portion, and each of the second portions has a fourth rounded corner on the side farther from the first planar portion; The radius of the third rounded corner, R3, is between 0.5mm and 2mm, and the radius of the fourth rounded corner, R4, is between 50mm and 200mm.

7. The partition according to claim 4, characterized in that: On the projection planes where the first direction and the second direction are located, the sum of the projected areas of the arc-shaped portion and the first planar portion is less than the area of ​​the large surface; In the first direction, the distance H1 between the edge of each first portion away from the first planar portion and the edge corresponding to the large surface of the battery is between 1 mm and 5 mm, and / or, in the second direction, the distance H2 between the edge of each second portion away from the first planar portion and the edge corresponding to the large surface of the battery is between 1 mm and 5 mm.

8. The partition according to any one of claims 1 to 7, characterized in that: The partition body is made of metal, and the elastic connector is made of silicone foam or rubber.

9. A battery restraint tray, characterized in that: Includes a tray body and a partition as described in any one of claims 1 to 8; The partitions are multiple partitions arranged at intervals on the tray body, and the spacing between two adjacent partitions is adjustable.

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