Battery tray

Abstract

This utility model relates to the field of battery formation technology, and more particularly to a battery tray. The battery tray includes a clamping assembly, a supporting assembly, and an airbag adjustment structure. The clamping assembly includes multiple clamping plates and multiple airbags, with the airbags fixedly disposed on the first side of the clamping plates. The supporting assembly supports the clamping assembly. The airbag adjustment structure abuts against at least a portion of the airbags and is detachably connected to the clamping plates. The airbag adjustment structure adjusts the size of the inflatable portion of the airbags according to the size of the battery to be clamped. The airbag adjustment structure allows for adjustment of the airbag size, i.e., the height and width of the airbags, to accommodate different battery heights and widths. During battery formation, the airbags clamp and tighten the battery. The compressive force applied by the airbags to the battery cells acts on the battery cells to ensure uniform compressive force on the cells, thereby promoting the expulsion of gas from the cells.

Description

Technical Field

[0001] This utility model relates to the field of battery formation technology, and in particular to a battery tray. Background Technology

[0002] After battery manufacturing, the process of activating the positive and negative electrode materials through specific charging and discharging methods to improve the battery's overall performance, including charge / discharge and storage capabilities, is called formation. During formation, lithium salts undergo side reactions with the electrolyte, forming a solid electrolyte interphase (SEI) film on the negative electrode side of the lithium battery. This film prevents further side reactions, thereby reducing the loss of active lithium in the battery. The quality of the SEI significantly impacts the cycle life, initial capacity loss, and rate performance of the lithium battery. However, gases are generated during battery formation, which can affect the quality of the SEI film. Therefore, it is necessary to promptly remove these gases during the formation process.

[0003] A battery tray is provided in the related technology. The battery tray clamps the battery with an airbag set on the clamping plate to release air from the battery during the battery formation process. Since the battery has a casing and a cell, when the battery is clamped, in order for the cell to receive the clamping force, the battery needs to be completely covered on the airbag, and the size of the airbag cannot exceed the size of the casing. However, the size of the battery is not uniform, and the shape of the battery is not unique. Therefore, different battery trays are needed to clamp the battery during battery formation. However, the cost of battery formation increases because different sizes and shapes of batteries are designed for different sizes and shapes.

[0004] Therefore, there is an urgent need for a battery tray to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery tray that can meet the clamping requirements of batteries of different sizes.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Battery tray, including:

[0008] A clamping assembly, comprising a plurality of clamping plates and a plurality of airbags, wherein the airbags are fixedly disposed on a first side of the clamping plates;

[0009] Support component for supporting the clamping component;

[0010] An airbag adjustment structure is provided, wherein the airbag adjustment structure abuts against at least a portion of the airbag and is detachably connected to the clamping plate, and the airbag adjustment structure is used to adjust the size of the inflatable portion of the airbag according to the size of the battery to be clamped.

[0011] This utility model has at least the following beneficial effects:

[0012] The battery tray is a tool used to load batteries. The airbag adjustment structure allows for adjustment of the airbag size, that is, the height and width of the airbag, to accommodate different battery heights and widths. During the formation process, the airbag clamps and tightens the battery. The squeezing force applied by the airbag to the battery cell acts on the battery cell to ensure that the cell is subjected to uniform squeezing force, thereby promoting the expulsion of gas inside the cell. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the battery tray provided in an embodiment of the present utility model;

[0015] Figure 2 An axonometric view of the adjustment frame provided in an embodiment of this utility model;

[0016] Figure 3 This is a first front view of the adjustment frame and clamping plate after they are connected, as provided in an embodiment of the present utility model.

[0017] Figure 4 This is a first side view of the adjustment frame and clamping plate after they are connected, as provided in an embodiment of the present utility model.

[0018] Figure 5 This is a second front view of the adjustment frame and clamping plate after they are connected, as provided in an embodiment of the present invention.

[0019] Figure 6 This is a second side view of the adjustment frame and clamping plate after they are connected, as provided in an embodiment of the present utility model.

[0020] Figure 7 A front view of a first structure of the adjustment frame provided in an embodiment of this utility model;

[0021] Figure 8 A front view of a second structure of the adjustment frame provided in an embodiment of this utility model;

[0022] Figure 9 A front view of a third structure of the adjustment frame provided in an embodiment of this utility model;

[0023] Figure 10 A front view of the fourth structure of the adjustment frame provided in this embodiment of the utility model;

[0024] Figure 11 This is a first front view of the battery support, adjustment frame, and clamping plate provided in this embodiment of the utility model after they are connected.

[0025] Figure 12 This is a second front view of the battery support, adjustment frame, and clamping plate provided in this embodiment of the utility model after they are connected.

[0026] Figure 13 This is a third front view of the battery support, adjustment frame, and clamping plate provided in this embodiment of the utility model after they are connected.

[0027] Figure 14 This is a fourth front view of the battery support, adjustment frame, and clamping plate provided in this embodiment of the utility model after they are connected.

[0028] Figure 15 A first side view showing a clamping plate with a protrusion provided in an embodiment of the utility model;

[0029] Figure 16 A second side view showing a clamping plate with a protrusion provided in an embodiment of the utility model.

[0030] In the picture:

[0031] 1. Clamping assembly; 11. Clamping plate; 111. First side; 112. Second side; 12. Airbag; 13. Protrusion; 2. Support assembly; 21. Base plate; 22. Limiting component; 23. Side plate; 3. Adjustment frame; 31. Adjustment hole; 4. Battery support component; 100. Battery. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] After battery manufacturing, a crucial step is the battery formation process. This process involves activating the active materials within the battery through initial charge and discharge cycles, and forming a solid electrolyte interphase (SEI) film (also known as a passivation film) on the surface of the electrode active layer (usually the negative electrode active layer). The SEI film formed on the electrode active layer prevents redox reactions between the active materials and the electrolyte, thus ensuring the battery's electrochemical stability, cycle life, and self-discharge performance.

[0037] However, during battery formation, some gases are generated simultaneously with the formation of the SEI film on the surface of the electrode active layer. These gases are primarily insulating gases (such as hydrocarbon gases). If these gases are not removed in time, they will obstruct the active ion channels, preventing active ions from migrating smoothly to the electrode active layer. This can lead to problems such as black spots and lithium plating on the electrode, affecting the quality of the SEI film formation, the battery formation effect, and ultimately, the battery's electrochemical stability, cycle life, and self-discharge performance. Therefore, it is essential to remove these gases from the battery promptly during the formation process.

[0038] To address this, related technologies typically use battery trays to facilitate the timely expulsion of gases from the battery during formation. The restraint plates of the battery tray clamp and pressurize the battery to suppress gaps (GAPs) in the electrode assemblies, thus allowing gases generated during formation to escape. However, different battery sizes require different airbag sizes. Therefore, different sized airbags are needed for different battery sizes to ensure the airbag size does not exceed the battery's dimensions, resulting in uneven stress on the battery cells. This necessitates the use of additional airbags for different battery sizes, directly leading to high manufacturing costs and poor versatility of battery trays.

[0039] Therefore, some embodiments of this application provide a battery tray that, by providing an airbag adjustment structure on the airbag, can adjust the size of the airbag according to the size of the battery to be clamped, so as to ensure that the battery cell is squeezed and vented by the airbag, thereby improving the versatility of the battery tray while improving the formation quality, reducing the manufacturing cost of the battery tray, and thus reducing the formation cost.

[0040] The battery tray disclosed in this application can be used to clamp the battery during battery formation, allowing for adaptive changes in airbag size. The battery can be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc. The battery can be cylindrical, flat, cuboid, or other shapes, etc. The battery can be packaged using different methods to form cylindrical batteries, square batteries, or pouch batteries, etc.

[0041] Some embodiments of this application provide a battery tray that can adjust the size of the airbag according to the size of the battery to be clamped, so as to ensure that the battery cells are squeezed and vented by the airbag.

[0042] like Figures 1 to 3As shown, the battery tray includes a clamping assembly 1, a support assembly 2, and an airbag adjustment structure. The clamping assembly 1 includes multiple clamping plates 11 and multiple airbags 12. The airbags 12 are fixedly disposed on the first side 111 of the clamping plates 11. The support assembly 2 is used to support the clamping assembly 1. The airbag adjustment structure abuts against at least a portion of the airbags 12, and the airbag adjustment structure is detachably connected to the clamping plates 11. The airbag adjustment structure is used to adjust the size of the inflatable portion of the airbags 12 according to the size of the battery 100 to be clamped.

[0043] It should be noted that the battery tray is a tool used to load the battery 100. The airbag adjustment structure can adjust the size of the airbag 12, that is, adjust the height and width of the airbag 12 to accommodate different battery heights and widths. During the formation process, the airbag 12 clamps and tightens the battery 100. The compressive force applied by the airbag 12 to the battery 100 will act on the battery cell to ensure that the battery cell is subjected to uniform compressive force, thereby promoting the gas inside the battery cell to be discharged.

[0044] For example, when the battery 100 is a square battery, the adjustment frame 3 is used to adjust the size of the inflatable part of the airbag 12, and the size of the inflatable part of the airbag 12 includes the height and width.

[0045] Understandably, the airbag adjustment structure adjusts the size of the inflated portion of the airbag 12 as needed. When the size of the battery 100 to be clamped is the same as the maximum size of the airbag 12, the size of the airbag 12 can be made to match the size of the battery 100 by directly removing the airbag adjustment structure. This expands the application range of the battery tray, accommodating the clamping needs of batteries 100 of different sizes.

[0046] The battery tray can be a fixed component that is fixed to the formation storage location. In this case, the battery tray is used only for the formation system. Alternatively, the battery tray can be a movable component that can move and pass through the formation storage location. In this case, the battery tray can be docked at the formation storage location for use in the formation system, or it can be moved together with the battery 100 it contains to other storage locations such as liquid injection, capacity testing, and measurement for use in other systems.

[0047] In some embodiments, the airbag adjustment structure and the airbag 12 are located on the same side of the clamping plate 11, while in other embodiments, the airbag adjustment structure and the airbag 12 are located on opposite sides of the clamping plate 11.

[0048] like Figures 2 to 6 As shown, in some embodiments of this application, the airbag adjustment structure includes multiple adjustment frames 3, which are detachably connected to the clamping plate 11. The adjustment frames 3 are used to cover part of the airbag 12.

[0049] It is understandable that the part of the airbag 12 that is covered is the part that exceeds the size of the battery 100 to be clamped. Among the multiple adjustment frames 3, there are corresponding adjustment frames 3 for batteries 100 of different sizes. The number of adjustment holes with the same size is multiple. This makes it easy for batteries 100 of the same size to be clamped and vented uniformly during the formation process. That is, each clamping plate 11 can correspond to multiple adjustment frames 3 with different sizes of adjustment holes. The adjustment frame 3 is selected according to the size of the battery 100. After the adjustment frame 3 is detachably connected to the clamping plate 11, the corresponding battery 100 is clamped.

[0050] The adjustment frame 3 is detachably connected to the clamping plate 11 by screws. In addition, the screws can also be used to fix the excess part of the airbag 12, so as to prevent the reaction force of the airbag 12 on the adjustment frame 3 after the airbag 12 is inflated from being greater than the clamping force of the adjustment frame 3 on the airbag 12, so as to effectively compress the excess part of the airbag 12 that exceeds the size of the battery 100.

[0051] For example, such as Figure 2 As shown, adjustment frame 3 can be a flat plate structure.

[0052] The airbag 12 can be inflated or deflated. Specifically, the airbag 12 includes a hollow flexible capsule (somewhat like a balloon, but with better elasticity). By inflating the flexible capsule with air, the capsule can be inflated and is less likely to burst. Conversely, by releasing the air from the capsule, it can deflate and return to its original deflated shape.

[0053] In some embodiments of this application, the adjustment frame 3 has an adjustment hole 31 with the same shape as the battery 100, and the inflatable portion of the airbag 12 is located within the adjustment hole 31.

[0054] It is understandable that, for batteries 100 of different shapes, the shape of the adjustment hole 31 should correspond to the shape of the battery 100 to ensure that the large surface of the battery 100 can be clamped and the pressure is uniform, so as to meet the clamping requirements of batteries 100 of different shapes and sizes.

[0055] For example, such as Figure 7 As shown, the adjustment hole 31 is opened in the middle of the adjustment frame 3. After the adjustment frame 3 is installed on the clamping plate 11, the part of the airbag 12 near the edge is pressed and cannot be inflated, while the part in the middle that is not pressed can be inflated.

[0056] In some embodiments of this application, such as Figure 8 As shown, the adjustment hole 31 penetrates one side wall of the adjustment frame 3 along the height direction of the airbag 12.

[0057] It is understandable that the adjustment hole 31 extends along the height direction of the airbag 12 to penetrate the bottom or top wall of the adjustment frame 3, so as to expose the inflatable part of the airbag 12.

[0058] In some embodiments of this application, such as Figure 9 As shown, the adjustment hole 31 extends through one side wall of the adjustment frame 3 along the width direction of the airbag 12.

[0059] Understandably, the adjustment hole 31 extends along the width of the airbag 12 to penetrate one of the left and right sidewalls of the adjustment frame 3, so as to expose the inflatable part of the airbag 12.

[0060] In some embodiments of this application, such as Figure 10 As shown, the adjustment hole 31 extends along the height direction of the airbag 12 to penetrate one of the bottom wall and the top wall of the adjustment frame 3. The adjustment hole 31 also extends along the width direction of the airbag 12 to penetrate one of the two side walls of the adjustment frame 3, so that the inflatable part of the airbag 12 is exposed.

[0061] In some embodiments, the area S11 of the adjustment hole 31 is smaller than the area S12 of the side of the battery 100 facing the airbag 12, where S11 = (0.7~0.95)*S12. For example, S11 = 0.7*S12, S11 = 0.75*S12, S11 = 0.8*S12, S11 = 0.85*S12, S11 = 0.9*S12 or S11 = 0.95*S12, but no specific limitation is made in this embodiment.

[0062] like Figure 11 and Figure 12 As shown, in some embodiments of this application, the battery tray further includes a battery support 4, which is disposed on the same side of the clamping plate 11 as the airbag adjustment structure, and the battery support 4 is detachably connected to the clamping plate 11.

[0063] It should be noted that the battery support 4 is used to support the battery 100 in the height direction. When the height of the battery 100 changes, the height of the airbag 12 will also change accordingly. The battery support 4 can be applied to any size battery 100 to ensure that batteries 100 of different sizes are always supported in height.

[0064] The battery support 4 and the adjustment frame 3 are located on the same side of the clamping plate 11. The battery support 4 can be located at the bottom of the adjustment frame 3, and it needs to protrude from the adjustment frame 3 to ensure that the battery 100 is supported by the battery support 4. Of course, the battery support 4 can also be directly installed on the side of the adjustment frame 3 away from the airbag 12. When the battery support 4 is installed on the side of the adjustment frame 3 away from the airbag 12, the thickness of the battery support 4 should not exceed the thickness of the battery 100, that is, the thickness of the battery support 4 is less than or equal to the thickness of the battery 100.

[0065] Of course, in some other embodiments, the battery support 4 and the adjustment frame 3 are respectively disposed on both sides of the clamping plate 11.

[0066] The battery tray provided in this application can clamp batteries 100 of different sizes through the cooperation of the adjusting frame 3 and the battery support 4, thus making it suitable for the formation of batteries 100 of different sizes. The battery support 4 is designed to meet the height support requirements of batteries 100 of different sizes, so that after batteries 100 of different sizes are clamped in contact with the airbag 12, the pressure of the airbag 12 on the battery 100 can be relatively evenly distributed at the cell of the battery 100, so that the cell of the battery 100 is subjected to uniform pressure. Thus, under the support of the battery support 4, the height of the battery 100 is consistent with the size-adjusted airbag 12, thereby forming a better effect of pressure, clamping, constraint and restraint on the battery 100. This can effectively ensure and improve the venting effect during the formation of the battery 100, effectively reduce the risk of black spots and lithium plating on the electrode due to gas obstructing the active ion channels, thereby ensuring and improving the film formation quality of the SEI film, the formation effect of the battery 100, and the electrochemical stability, cycle life and self-discharge performance of the battery 100.

[0067] When the size of battery 100 changes, airbag 12 is designed to be compatible with the largest size of battery 100. The height of the unobstructed part of airbag 12 must be less than the height of battery 100, and the width must be less than the width of battery 100. Adjustment frame 3 is designed one-to-one with the size of battery 100, that is, only the corresponding adjustment frame 3 needs to be replaced to achieve compatibility with batteries 100 of different sizes.

[0068] The battery support 4 can meet the needs of changing the height of the battery 100. The battery support 4 can move the battery 100 in the height direction, avoiding the expansion and damage caused by the airbag 12 without the battery 100 pressing against it.

[0069] Continue to refer to Figure 12 and Figure 13 In some other embodiments of this application, the battery support 4 and the adjustment frame 3 are an integral structure.

[0070] It should be noted that the battery support 4 and the adjustment frame 3 can be obtained by injection molding, casting or stamping. Specifically, the battery support 4 is located on the side of the adjustment frame 3 opposite to the airbag 12.

[0071] By adopting the above solution, the battery support 4 and the adjustment frame 3 can be integrated into a single structure, allowing both the battery support 4 and the adjustment frame 3 to be installed simultaneously with the clamping plate 11. This improves the assembly effect of the battery support 4, the adjustment frame 3, and the clamping plate 11, enhances the connection stability of these components, and saves time in assembling the battery tray.

[0072] The width of the battery support 4 should be less than the width of the battery 100. The top surface of the battery support 4 should fit against the bottom surface of the battery 100. The central axis of the battery support 4 along the height direction can be parallel to the central axis of the battery 100.

[0073] For example, the battery support 4 and the adjustment frame 3 are fixedly connected to form an integral structure. The battery support 4 and the adjustment frame 3 can be connected by welding, bonding, screw fixing, or other methods.

[0074] For example, the battery support 4 and the adjustment frame 3 are integrally formed, that is, the battery support 4 and the adjustment frame 3 are obtained by integral molding.

[0075] By adopting the above solution, the battery support 4 is fixedly connected to the adjustment frame 3, which eliminates the need to connect the battery support 4 and the adjustment frame 3 to the clamping plate 11 one by one during installation, thereby reducing the battery tray assembly time.

[0076] It is understandable that the adjustment frame 3 is connected to the clamping plate 11 through the battery support 4. The adjustment frame 3 is not directly connected to the clamping plate 11. The battery support 4 can be connected to the clamping plate 11 by welding, bonding, screw fixing or other methods.

[0077] By adopting the above scheme, the battery support 4 can be directly connected to the clamping plate 11. The battery support 4 is fixed on the adjustment frame 3. Under the bidirectional clamping of the clamping plate 11 and the battery support 4, the adjustment frame 3 always remains in close contact with the airbag 12. In this way, the part of the airbag 12 covered after inflation will not expand, and the inflatable part of the airbag 12 is limited to meet the clamping requirements of batteries 100 of different sizes. Thus, with the support of the battery support 4, the height of the battery 100 is consistent with the size-adjusted airbag 12, thereby forming a better effect of pressure, clamping, constraint and restraint on the battery 100. This can effectively ensure and improve the venting effect during the formation of the battery 100, effectively reduce the risk of black spots and lithium plating on the electrode due to gas obstructing the active ion channels. This can ensure and improve the film formation quality of the SEI film, the formation effect of the battery 100, and the electrochemical stability, cycle life and self-discharge performance of the battery 100.

[0078] like Figure 11 and Figure 14 As shown, in some embodiments of this application, the battery support 4 and the adjustment frame 3 are separate structures.

[0079] Specifically, the adjustment frame 3 and the battery support 4 are detachably connected to the clamping plate 11.

[0080] For example, such as Figure 11 As shown, the screw holes provided in the battery support 4 and the screw holes provided in the adjustment frame 3 are coaxial along the thickness direction of the clamping plate 11, so that the screws pass through the screw holes of the battery support 4 and the screw holes of the adjustment frame 3 in sequence and are threadedly connected to the clamping plate 11.

[0081] For example, such as Figure 14 As shown, the adjusting frame 3 and the battery support 4 are detachably connected to the clamping plate 11 according to their positions. In this case, the battery support plate can be L-shaped, with a groove on the side of the battery support plate facing the adjusting frame 3, and the battery support plate portion located within the groove. That is, the adjusting frame 3 is first fixed to the clamping plate 11, and then the battery support 4 is fixed to the clamping plate 11, with the portion of the battery support 4 supporting the battery 100 covering part of the adjusting frame 3.

[0082] By adopting the above scheme, the adjusting frame 3 and the battery support 4 can be selected with different specifications to meet the size requirements of the battery 100. The battery support 4 and the clamping plate 11 work together to clamp and fix the adjusting frame 3, which can achieve secondary fixation of the adjusting frame 3. Based on this, the battery 100 is supported under the premise that the size of the airbag 12 meets the size requirements of the battery 100 currently being clamped, so as to avoid the battery 100 being unable to be compressed and improve the air venting effect of the battery 100.

[0083] like Figure 13As shown, in some other embodiments of this application, the number of battery support members 4 is two or more, and the two or more battery support members 4 are spaced apart on the second side 112 of the clamping plate 11.

[0084] It is understandable that each adjustment frame 3 can be fixedly connected to two or more battery support members 4, and adjacent battery support members 4 are spaced apart, so that a ventilation channel is formed between adjacent battery support members 4, and airflow can enter from between adjacent clamping plates 11 and cool the battery 100 through the ventilation channel.

[0085] By adopting the above scheme, two or more battery support members 4 can be set on a single clamping plate 11 to support the battery 100 in the height direction. The adjacent battery support members 4 are spaced apart, so that a ventilation channel for airflow can be formed between the adjacent battery support members 4. The airflow passes through the ventilation channel and acts directly on the surface of the battery 100 to cool the battery 100.

[0086] like Figure 15 and Figure 16 As shown, in some embodiments of this application, the second side 112 of the clamping plate 11 is provided with a protrusion 13, which is located within the projection of the battery 100 on the second side 112 of the clamping plate 11 along the thickness direction of the clamping plate 11.

[0087] It is understandable that the protrusion 13 and the clamping plate 11 are separate structures, which can be connected by fasteners, adhesives, or by fitting together. The protrusion 13 protrudes from the clamping plate 11 to provide support for the adjacent battery 100. The area S21 of the protrusion 13 facing the side of the battery 100 should be smaller than the area S22 of the side of the battery 100 facing the protrusion 13. That is, along the direction perpendicular to the second side 112, the projection S22 of the battery 100 on the second side 112 is larger than the area S21 of the protrusion 13.

[0088] The battery 100 includes a casing and a cell. The cell is installed inside the casing, so the area of ​​the casing is larger than that of the cell. When the casing is clamped by the airbag 12, if the clamping plate 11 is directly used to clamp the cell on the second side 112 facing the cell, the edge of the casing will be clamped and deformed, and the clamping force on the cell will be uneven. The protrusion 13 is provided to provide clamping force to the cell of the battery 100, so that the cell of the battery 100 is subjected to uniform clamping force, so as to form a better effect of pressure, clamping, constraint and restraint on the battery 100. It can effectively ensure and improve the venting effect during the formation of the battery 100, effectively reduce the risk of black spots and lithium plating on the electrode due to gas obstructing the active ion channel, thereby ensuring and improving the film formation quality of the SEI film, the formation effect of the battery 100, and the electrochemical stability, cycle life and self-discharge performance of the battery 100.

[0089] In some other embodiments of this application, the protrusion 13 is detachably disposed on the other side of the clamping plate 11, and the protrusion 13 can be deformed by the battery pressing.

[0090] For example, the protrusion 13 can be a rubber pad that can deform elastically or an air cushion with the same shape and size as the battery 100 to be clamped. The air cushion includes a hollow flexible capsule (somewhat like a balloon, but with better elasticity), the interior of which is filled with gas and inflated, and the flexible capsule is not easy to burst.

[0091] Understandably, the protrusion 13 can be selected according to the different sizes of the battery 100, that is, the size (height and width) of the protrusion 13 can be selected, and a clamping plate 11 can be installed with different sizes of protrusion 13 when batteries 100 of different sizes are clamped.

[0092] By adopting the above solution, the protrusion 13 can be detachably installed on the clamping plate 11 to adapt to the clamping requirements of different batteries 100, so that each battery 100 has a corresponding protrusion 13. This can improve the manufacturing cost of the battery tray and increase its versatility. Without replacing the clamping plate 11 and the support component 2, the clamping requirements of batteries 100 of different sizes can be met by directly replacing the protrusion 13 and the airbag adjustment structure.

[0093] In some embodiments of this application, the side area of ​​the protrusion 13 facing the battery 100 is S21, and the side area of ​​the battery 100 facing the protrusion 13 is S22, where S21 = (0.7~0.95)*S22. For example, S21 = 0.7*S22, S21 = 0.75*S22, S21 = 0.8*S22, S21 = 0.85*S22, S21 = 0.9* or S21 = 0.95*S22, but no specific limitation is made in this embodiment.

[0094] The above ratio ensures that the area S21 of the protrusion 13 is always smaller than S22, thereby enabling the battery cell of the battery 100 to be clamped and supported by the protrusion 13 to adapt to the clamping requirements of different batteries 100, so that each battery 100 has a corresponding protrusion 13. This can improve the manufacturing cost of the battery tray and improve the versatility of the battery tray. Without changing the clamping plate 11 and the support component 2, the clamping requirements of batteries 100 of different sizes can be met by directly replacing the protrusion 13 and the airbag adjustment structure.

[0095] In some embodiments of this application, the support component 2 includes a base plate 21, at least two limiting members 22 and two side plates 23. The two ends of the base plate 21 are fixedly connected to the two side plates 23 respectively, and the two ends of the limiting members 22 are fixedly connected to the two side plates 23 respectively. The limiting members 22 are located above the base plate 21 and are used to restrict the movement of the battery 100 in the width direction. The base plate 21 is used to support the battery 100.

[0096] It should be noted that the base plate 21, the limiting member 22, and the side plate 23 of the support assembly 2 provide support and limiting for the clamping plate 11. The base plate 21 is mainly used to support the clamping plate 11, while the limiting member 22 is located at both ends of the clamping plate 11 in the width direction to limit the ends of the clamping plate 11. The side plate 23 provides support for the base plate 21 and the limiting member 22. In addition, the side plate 23 also provides limiting for the clamping plate 11 located at the edge to prevent the clamping plate 11 from detaching from the base plate 21 and tipping over during the movement of the battery tray.

[0097] By adopting the above solution, the support component 2 can support the clamping plate 11, and the adjacent clamping plate 11 is used to clamp the battery 100. In fact, the support component 2 is also used to support the battery 100, providing support for the battery 100 during formation, so as to ensure the formation effect of the battery 100.

[0098] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A battery tray, characterized by, include: The clamping assembly (1) includes a plurality of clamping plates (11) and a plurality of airbags (12), wherein the airbags (12) are fixedly disposed on the first side (111) of the clamping plates (11). Support component (2) for supporting the clamping component (1); An airbag adjustment structure is provided, which abuts against at least a portion of the airbag (12), and is detachably connected to the clamping plate (11). The airbag adjustment structure is used to adjust the size of the inflatable portion of the airbag (12) according to the size of the battery (100) to be clamped.

2. The battery tray of claim 1, wherein, The airbag adjustment structure includes multiple adjustment frames (3), which are detachably connected to the clamping plate (11). The adjustment frames (3) are used to cover part of the airbag (12).

3. The battery tray of claim 2, wherein, The adjustment frame (3) has an adjustment hole (31) with the same shape as the battery (100), and the inflatable part of the airbag (12) is located in the adjustment hole (31).

4. The battery tray of claim 3, wherein, The adjustment hole (31) penetrates one side wall of the adjustment frame (3) along the height direction of the airbag (12); And / or, the adjustment hole (31) extends through one side wall of the adjustment frame (3) along the width direction of the airbag (12).

5. The battery tray of claim 3 or 4, wherein, The area S11 of the adjustment hole (31) is smaller than the area S12 of the side of the battery (100) facing the airbag (12), wherein S11 = (0.7~0.95) * S12.

6. The battery tray of any one of claims 2-4, wherein, The battery tray also includes a battery support (4), which is located on the same side of the clamping plate (11) as the airbag adjustment structure, and the battery support (4) is detachably connected to the clamping plate (11).

7. The battery tray of claim 6, wherein, The adjustment frame (3) and the battery support (4) are separate structures.

8. The battery tray of claim 6, wherein, The battery support (4) and the adjustment frame (3) are an integral structure.

9. The battery tray of claim 6, wherein, The number of battery support members (4) is two or more, and the two or more battery support members (4) are spaced apart on the second side (112) of the clamping plate (11).

10. The battery tray of any one of claims 1-4, wherein, The second side (112) of the clamping plate (11) is provided with a protrusion (13), and along the thickness direction of the clamping plate (11), the protrusion (13) is located within the projection of the battery (100) on the second side (112) of the clamping plate (11).

11. The battery tray of claim 10, wherein, The protrusion (13) is detachably disposed on the other side of the clamping plate (11), and the protrusion (13) can be deformed by the battery (100).

12. The battery tray of claim 11, wherein, The side area of ​​the protrusion (13) facing the battery (100) is S21, and the side area of ​​the battery (100) facing the protrusion (13) is S22, where S21 = (0.7~0.95) * S22.

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