Adapting structure of tab structure, battery pack and electric equipment

Abstract

The utility model discloses a switching structure of a tab structure, a battery pack and electric equipment, and relates to the technical field of batteries, the tab structure is a multi-layer structure with more than 50 layers, part of the switching structure is connected to the tab structure, part of the switching structure is connected to a cover plate, and the switching structure comprises a first switching piece and a second switching piece. The first adapter plate is at least partially inserted into the middle of the tab structure, part of the tab structure is connected to the first side surface of the first adapter plate, and the other part of the tab structure is connected to the second side surface of the first adapter plate. The second switching piece is connected with the first switching piece, the first switching piece and the second switching piece are arranged at an angle, and the second switching piece can be connected to the cover plate. The two sides of the first switching piece are welded respectively, so that the welding difficulty can be remarkably reduced. By means of the design, the welding process is simplified, and the welding stability and reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to an adapter structure for an ear structure, a battery pack, and an electrical device. Background Art

[0002] In the process of battery manufacturing, the welding of the ear of a blade cell to the top cover is a key step to ensure the performance and safety of the battery.

[0003] However, with the increase in the number of ear layers on the cell, especially when it exceeds 50 layers, it becomes increasingly difficult to directly weld the ear to the top cover using traditional ultrasonic welding or laser welding techniques. The welding quality is difficult to guarantee, and it is easy to cause damage to the cell. Summary of the Utility Model

[0004] The present application provides an adapter structure for an ear structure, a battery pack, and an electrical device. By adopting the method of welding both sides of the first adapter piece respectively, the welding difficulty can be significantly reduced. This design not only simplifies the welding process but also improves the stability and reliability of welding.

[0005] In a first aspect, the present application provides an adapter structure for an ear structure. The ear structure is a multi-layer structure with more than 50 layers. Part of the adapter structure is connected to the ear structure, and part of the adapter structure is connected to the cover plate. The adapter structure includes a first adapter piece and a second adapter piece.

[0006] At least part of the first adapter piece is inserted into the middle of the ear structure. Part of the ear structure is connected to the first side surface of the first adapter piece, and another part of the ear structure is connected to the second side surface of the first adapter piece.

[0007] The second adapter piece is connected to the first adapter piece. The first adapter piece and the second adapter piece are arranged at an angle, and the second adapter piece can be connected to the cover plate.

[0008] The above adapter structure of the present application is applicable to a multi-layer ear structure with more than 50 layers. The adapter structure mainly includes two first adapter pieces and a second adapter piece that are fixedly connected or integrally provided. The first adapter piece is connected to the ear structure, and the second adapter piece is connected to the cover plate. When the corresponding cell body is a wound core, one cover plate can be provided. When the corresponding cell body is a blade cell, two cover plates can be provided, namely an anode plate for connecting the anode ear and a cathode plate for connecting the cathode ear.

[0009] The first connecting piece is at least partially inserted into the middle position of the tab structure. Specifically, a part of the tab structure is fixed to the first side surface of the first connecting piece by welding or other connection means, and another part of the tab structure is fixed to the second side surface of the first connecting piece. Such a design ensures a firm connection between the tab structure and the first connecting piece. Both parts of the tab structure have less than 50 layers. When the tab structure has more than 100 layers, two first connecting pieces can be set as needed, and the tab structure can be divided into three tab sub-assemblies with less than 50 layers; or a larger first connecting piece can be set, and different parts of the tab structure are connected to different positions of the first connecting piece.

[0010] The second connecting piece is connected to the first connecting piece, and the first connecting piece and the second connecting piece are arranged at a certain angle. This angular design enables the second connecting piece to be conveniently connected to the cover plate of the battery. Through this angular design, the connection between the tab structure and the cover plate can be effectively made more flexible and reliable.

[0011] Since the tab structure has a relatively large number of layers, reaching more than 50 layers, it is difficult to directly weld the tab to the top cover. By adopting the method of welding on both sides of the first connecting piece respectively, the welding difficulty can be significantly reduced. This design not only simplifies the welding process but also improves the stability and reliability of welding. Through this transfer structure, the multi-layer tab structure can be effectively connected to the middle cover plate in the battery to ensure the overall performance and safety of the battery.

[0012] In some examples, a part of the tab structure is connected to the first side surface of the first connecting piece by ultrasonic welding and forms a first ultrasonic weld mark.

[0013] Another part of the tab structure is connected to the second side surface of the first connecting piece by ultrasonic welding and forms a second ultrasonic weld mark.

[0014] A part of the tab structure is connected to one of the side surfaces of the first connecting piece by ultrasonic welding technology, thereby forming a clearly visible first ultrasonic weld mark. This welding method ensures a firm connection between the tab structure and the connecting piece, and also guarantees the high efficiency and precision of the welding process.

[0015] Another part of the tab structure is connected to the other side surface of the first connecting piece by ultrasonic welding technology, thereby forming a similarly clearly visible second ultrasonic weld mark. This welding method not only improves the reliability of welding but also ensures the stability and safety of the entire battery assembly.

[0016] By observing the first ultrasonic weld mark or the second ultrasonic weld mark, it can be more intuitive to see whether the welding of the corresponding part of the tab structure is stable and reliable.

[0017] In some examples, the size of the first ultrasonic weld mark is the same as that of the second ultrasonic weld, and the projection of the first ultrasonic weld mark relative to the first adapter can overlap with the second ultrasonic weld mark.

[0018] Alternatively, the size of the first ultrasonic weld mark is the same as that of the second ultrasonic weld, and the projection of the first ultrasonic weld mark relative to the first adapter can intersect with the second ultrasonic weld mark.

[0019] Alternatively, the size of the first ultrasonic weld mark is different from that of the second ultrasonic weld, and the projection of the first ultrasonic weld mark relative to the first adapter can at least partially overlap with the second ultrasonic weld mark.

[0020] Alternatively, the size of the first ultrasonic weld mark is different from that of the second ultrasonic weld, and the projection of the first ultrasonic weld mark relative to the first adapter can intersect with the second ultrasonic weld mark.

[0021] The above structure shows various mating situations of the first ultrasonic weld mark and the second ultrasonic weld mark. Among them, the size of the first ultrasonic weld mark can be exactly the same as that of the second ultrasonic weld. In this case, the projection position of the first ultrasonic weld mark on the first adapter can completely overlap with the projection of the second ultrasonic weld mark. This design ensures the precise alignment of the welding area, thereby improving the welding quality and the stability of the overall structure.

[0022] In addition, there is also a situation where the size of the first ultrasonic weld mark is the same as that of the second ultrasonic weld, but its projection position on the first adapter is carefully designed so that the first ultrasonic weld mark can intersect with the projection of the second ultrasonic weld mark. This intersecting design may help to disperse stress, thereby improving the durability and reliability of the structure in some applications.

[0023] Furthermore, there is also a possibility that the size of the first ultrasonic weld mark is different from that of the second ultrasonic weld. In this case, the projection position of the first ultrasonic weld mark relative to the first adapter must be able to at least partially overlap with the projection of the second ultrasonic weld mark. This partially overlapping design may help to achieve a better transition between welding areas of different sizes, thereby improving the strength and consistency of the overall welding.

[0024] Finally, there is also a design where the size of the first ultrasonic weld mark is different from that of the second ultrasonic weld, and its projection position on the first adapter can intersect with the projection of the second ultrasonic weld mark. This intersecting layout may help to provide a better stress distribution between welding areas of different sizes, thereby enhancing the stability and durability of the structure in some specific applications.

[0025] In some examples, the tab structure is provided on the blade battery cell. An anode tab is provided at the first end of the blade battery cell, and a cathode tab is provided at the second end of the blade battery cell. Both the anode tab and the cathode tab are tab structures.

[0026] The switching structure includes an anode switching structure matched with the anode tab and a cathode switching structure matched with the cathode tab, and the cover plate includes a top cover matched with the anode tab and a bottom cover matched with the cathode tab.

[0027] The anode tab is connected to the top cover through an anode switching structure, and the cathode tab is connected to the bottom cover through a cathode switching structure.

[0028] The tab structure can be specifically set at a specific position of the blade cell. Specifically, an anode tab is configured at the first end of the blade cell, and a cathode tab is configured at the second end of the blade cell. These two tabs, as part of the tab structure, each have different functions and roles. The anode tab is mainly responsible for conducting positive current, while the cathode tab is mainly responsible for conducting negative current.

[0029] Furthermore, the switching structure includes two main parts, which are respectively adapted to the anode tab and the cathode tab. Specifically, the anode tab can be connected through the anode switching structure, while the cathode tab is connected through the cathode switching structure. Such a design ensures smooth transmission of current and improves the stability and safety of the overall battery pack.

[0030] In addition, the cover part also includes two structures that are compatible with the tabs, namely the top cover and the bottom cover. The top cover is mainly compatible with the anode tab, while the bottom cover is mainly compatible with the cathode tab. With this design, the anode tab is connected to the top cover through the anode adapter structure, and the cathode tab is connected to the bottom cover through the cathode adapter structure. This connection method not only ensures the smooth transmission of current, but also makes the structure of the entire battery pack more compact and stable. Through this multi-level, multi-part adaptation and connection design, the overall performance of the battery pack has been significantly improved, and it also provides convenience for subsequent maintenance and overhaul.

[0031] In some examples, a positioning structure is disposed on the first adapter plate, the positioning structure is adapted to the tab structure, and the positioning structure can limit the tab structure.

[0032] The first adapter is equipped with a positioning structure. The positioning structure matches the structure of the battery tab and can be closely matched with the tab structure. Through the setting of the positioning structure, the position of the tab structure can be effectively limited and fixed to ensure that it remains in a predetermined position during the battery assembly process, thereby improving the overall stability and reliability of the battery assembly. And the welding quality of the tab structure can be guaranteed.

[0033] In some examples, the positioning structure is a positioning groove, and a portion of the tab structure can be snapped into the positioning groove.

[0034] The positioning structure can be set as a positioning groove, and part of the tab structure has the function of being able to be snapped into these positioning grooves. Specifically, the tab structure can be firmly fixed in the positioning groove by snapping, so as to achieve accurate positioning and connection.

[0035] In some examples, the included angle between the first adapter piece and the second adapter piece is 90° ± 5°.

[0036] The angle between the first adapter piece and the second adapter piece is set to 90 degrees, allowing a slight deviation of ±5 degrees. This means that the included angle between these two adapter pieces can be any value between 85 degrees and 95 degrees to ensure that the first adapter piece and the second adapter piece can be correctly fitted and connected.

[0037] In some examples, a strengthening structure is provided at the connection between the first adapter piece and the second adapter piece.

[0038] A strengthening structure is provided at the connection part of the first adapter piece and the second adapter piece. The setting of the strengthening structure is used to improve the strength and stability of the connection part, ensuring that the connection part can withstand a greater load and remain firm under various working conditions, thereby improving the reliability and service life of the overall battery structure.

[0039] In a second aspect, an embodiment of the present application further provides a battery pack, including the adapter structure of the above-mentioned tab structure and a housing. The housing has a receiving cavity, and the adapter structure, the tab structure, and the cover plate are all arranged in the receiving cavity.

[0040] The battery pack with the above-mentioned adapter structure can adopt the method of welding on both sides of the first adapter piece respectively, significantly reducing the welding difficulty. This design not only simplifies the welding process but also improves the stability and reliability of welding. Through this adapter structure, the multi-layer tab structure can be effectively connected to the cover plate in the battery, ensuring the overall performance and safety of the battery.

[0041] In a third aspect, an embodiment of the present application further provides an electrical device, including the above-mentioned battery pack and a device main body. The device main body has an assembly cavity, and the battery pack is arranged in the assembly cavity.

[0042] The electrical device with the above-mentioned battery pack can adopt the method of welding on both sides of the first adapter piece respectively, significantly reducing the welding difficulty. This design not only simplifies the welding process but also improves the stability and reliability of welding. Through this adapter structure, the multi-layer tab structure can be effectively connected to the cover plate in the battery, ensuring the overall performance and safety of the battery. Description of the Drawings

[0043] To more clearly illustrate the technical solutions in the present application or the prior art, the following will briefly introduce the drawings required for the description of the examples or the prior art. Obviously, the drawings described below are only some examples of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0044] Figure 1 FIG. is a schematic structural diagram when the tab structure, the adapter structure and the cover plate in an example of the present application are combined.

[0045] Figure 2 FIG. is a schematic cross-sectional view when the tab structure and the first adapter in an example of the present application are not welded.

[0046] Figure 3 FIG. is a schematic cross-sectional view when the tab structure and the first adapter in an example of the present application are welded.

[0047] Figure 4 For Figure 3 FIG. is a partially enlarged schematic view of the welded tab structure and the first adapter at position A in

[0048] Figure 5 FIG. is a schematic structural diagram when multiple groups of tab structures, adapter structures and cover plates in an example of the present application are combined.

[0049] Figure 6 FIG. is a schematic cross-sectional structure diagram when multiple groups of tab structures, adapter structures and cover plates in an example of the present application are combined.

[0050] Figure 7 FIG. is a schematic structural diagram when multiple groups of tab structures, adapter structures and cover plates in an example of the present application are combined and the tab structure is welded to the first adapter.

[0051] Reference numerals:

[0052] 100, adapter structure; 110, first adapter; 120, second adapter; 200, battery cell main body; 300, tab structure; 400, cover plate. Detailed embodiments

[0053] In order to make the objectives, technical solutions and advantages of the present application more clear, the following further details the present application in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not used to limit the present application.

[0054] During the process of battery manufacturing, the welding step of the tab of the blade cell to the top cover is crucial, directly related to the performance and safety of the battery. However, as the number of cell layers continues to increase, especially when the number of layers exceeds 50, it becomes increasingly challenging to directly weld the tab to the top cover using traditional ultrasonic welding or laser welding techniques. This challenge is mainly reflected in the difficulty of ensuring welding quality, and at the same time, it is easy to damage the cell during the welding process.

[0055] Specifically, when traditional welding techniques face high-layer cells, due to the complexity of the welding area and space limitations, it is difficult to achieve precise welding. Ultrasonic welding in high-layer cells may cause uneven heat distribution, thus affecting the strength and reliability of the welding point. Although laser welding has high precision, in high-layer cells, the penetration of the laser beam may weaken, resulting in insufficient welding depth and thus affecting the welding quality. In addition, the heat generated during the welding process may cause thermal damage to the materials inside the cell, thereby reducing the overall performance and lifespan of the battery.

[0056] To solve the above technical problems, please refer to Figures 1 - 7 As shown, in the first aspect of the present application, a transfer structure 100 for a tab structure 300 is proposed. By adopting the method of welding both sides of the first transfer piece 110 respectively, the welding difficulty can be significantly reduced. This design not only simplifies the welding process but also improves the stability and reliability of welding.

[0057] Refer to Figures 1 - 4 As shown, in some examples, a transfer structure 100 for a tab structure 300 is provided. The tab structure 300 is a multi-layer structure with more than 50 layers. Part of the transfer structure 100 is connected to the tab structure 300, and part of the transfer structure 100 is connected to the cover plate 400. The transfer structure 100 includes a first transfer piece 110 and a second transfer piece 120.

[0058] At least part of the first transfer piece 110 is inserted into the middle of the tab structure 300. Part of the tab structure 300 is connected to the first side surface of the first transfer piece 110, and the other part of the tab structure 300 is connected to the second side surface of the first transfer piece 110.

[0059] The second transfer piece 120 is connected to the first transfer piece 110. The first transfer piece 110 and the second transfer piece 120 are arranged at an angle, and the second transfer piece 120 can be connected to the cover plate 400.

[0060] The above-mentioned transfer structure 100 of the present application is applicable to a multi-tab structure 300 with more than 50 layers. The transfer structure 100 mainly includes two first transfer sheets 110 and a second transfer sheet 120 that are fixedly connected or integrally provided. The first transfer sheet 110 is connected to the tab structure 300, and the second transfer sheet 120 is connected to the cover plate 400. When the corresponding battery cell body 200 is a wound core, one cover plate 400 can be provided. When the corresponding battery cell body 200 is a blade battery cell, two cover plates 400 can be provided, namely an anode plate connected to the anode tab and a cathode plate connected to the cathode tab.

[0061] At least a part of the first transfer sheet 110 is inserted into the middle position of the tab structure 300. Specifically, a part of the tab structure 300 is fixed to the first side surface of the first transfer sheet 110 by welding or other connection means, and another part of the tab structure 300 is fixed to the second side surface of the first transfer sheet 110. Such a design ensures a firm connection between the tab structure 300 and the first transfer sheet 110. Both parts of the tab structure 300 are less than 50 layers. When the tab structure 300 has more than 100 layers, two first transfer sheets 110 can be provided as needed, and the tab structure 300 can be divided into three tab sub-assemblies with less than 50 layers; or a larger first transfer sheet 110 can be provided, and different parts of the tab structure 300 are connected to different positions of the first transfer sheet 110.

[0062] The second transfer sheet 120 is connected to the first transfer sheet 110, and the first transfer sheet 110 and the second transfer sheet 120 are arranged at a certain angle. This angular design enables the second transfer sheet 120 to be conveniently connected to the cover plate 400 of the battery. Through this angular design, the connection between the tab structure 300 and the cover plate 400 can be effectively made more flexible and reliable.

[0063] Since the tab structure 300 has a large number of layers, reaching more than 50 layers, it is difficult to directly weld the tabs to the top cover. By adopting the method of welding on both sides of the first transfer sheet 110 respectively, the welding difficulty can be significantly reduced. This design not only simplifies the welding process but also improves the stability and reliability of welding. Through this transfer structure 100, the multi-layer tab structure 300 can be effectively connected to the cover plate 400 in the battery, ensuring the overall performance and safety of the battery.

[0064] Refer to Figures 1 - 4 As shown, in some examples, a part of the tab structure 300 is connected to the first side surface of the first transfer sheet 110 by ultrasonic welding and forms a first ultrasonic weld mark.

[0065] Another part of the tab structure 300 is connected to the second side surface of the first transfer sheet 110 by ultrasonic welding and forms a second ultrasonic weld mark.

[0066] A part of the tab structure 300 is connected to one side of the first adapter piece 110 through ultrasonic welding technology, thereby forming a clearly visible first ultrasonic weld mark. This welding method ensures a firm connection between the tab structure 300 and the adapter piece, and also guarantees the efficiency and precision of the welding process.

[0067] Another part of the tab structure 300 is connected to the other side of the first adapter piece 110 through ultrasonic welding technology, thereby forming a similarly clearly visible second ultrasonic weld mark. This welding method not only improves the reliability of the welding, but also ensures the stability and safety of the entire battery assembly.

[0068] By observing the first ultrasonic weld mark or the second ultrasonic weld mark, it is possible to visually determine whether the welding of the corresponding part of the tab structure 300 is stable and reliable.

[0069] In addition, according to the requirements of actual applications, ultrasonic welding technology can be flexibly replaced with laser welding technology. Laser welding, with its characteristics of high precision and high efficiency, can form a more delicate and firm connection between the tab structure 300 and the adapter piece. Of course, in addition to ultrasonic welding and laser welding, other types of welding methods can also be selected according to specific requirements, such as resistance welding, friction welding, etc., to meet different production requirements and performance standards. In this way, the most suitable welding technology can be flexibly selected according to different application scenarios and performance requirements, thereby ensuring the reliability and overall performance of the battery assembly.

[0070] Refer to Figures 1 - 4 As shown, in some examples, the first ultrasonic weld mark and the second ultrasonic weld mark have the same size, and the projection of the first ultrasonic weld mark relative to the first adapter piece 110 can overlap with the second ultrasonic weld mark.

[0071] Or, the first ultrasonic weld mark and the second ultrasonic weld mark have the same size, and the projection of the first ultrasonic weld mark relative to the first adapter piece 110 can intersect with the second ultrasonic weld mark.

[0072] Or, the first ultrasonic weld mark and the second ultrasonic weld mark have different sizes, and the projection of the first ultrasonic weld mark relative to the first adapter piece 110 can at least partially overlap with the second ultrasonic weld mark.

[0073] Or, the first ultrasonic weld mark and the second ultrasonic weld mark have different sizes, and the projection of the first ultrasonic weld mark relative to the first adapter piece 110 can intersect with the second ultrasonic weld mark.

[0074] The above structure shows various mating situations of the first ultrasonic weld mark and the second ultrasonic weld mark. Among them, the size of the first ultrasonic weld mark can be exactly the same as that of the second ultrasonic weld. In this case, the projection position of the first ultrasonic weld mark on the first adapter piece 110 can completely overlap with the projection of the second ultrasonic weld mark. This design ensures the precise alignment of the welding area, thereby improving the welding quality and the stability of the overall structure.

[0075] In addition, there is also a situation where the size of the first ultrasonic weld mark is the same as that of the second ultrasonic weld, but its projection position on the first adapter piece 110 is carefully designed so that the first ultrasonic weld mark can intersect with the projection of the second ultrasonic weld mark. This intersecting design may help to disperse stress, thereby improving the durability and reliability of the structure in certain applications.

[0076] Furthermore, there is also a possibility that the size of the first ultrasonic weld mark is not the same as that of the second ultrasonic weld. In this case, the projection position of the first ultrasonic weld mark relative to the first adapter piece 110 should be able to at least partially overlap with the projection of the second ultrasonic weld mark. This partially overlapping design may help to achieve a better transition between welding areas of different sizes, thereby improving the strength and consistency of the overall welding.

[0077] Finally, there is also a design where the size of the first ultrasonic weld mark is different from that of the second ultrasonic weld, and its projection position on the first adapter piece 110 can intersect with the projection of the second ultrasonic weld mark. This intersecting layout may help to provide a better stress distribution between welding areas of different sizes, thereby enhancing the stability and durability of the structure in certain specific applications.

[0078] The projection of the first ultrasonic weld mark relative to the first adapter piece 110 can be called the first projection, and the projection of the second ultrasonic weld mark relative to the first adapter piece 110 can be called the second projection. To ensure the welding quality, the larger one of the first projection and the second projection can completely cover the smaller one. This design ensures the full coverage of the welding area, thereby avoiding the risks of incomplete penetration or false welding. Through this overlapping design, the strength and reliability of the welded part can be significantly improved, ensuring the stable performance of the battery during long-term use.

[0079] Refer to Figures 5 - 7 As shown, in some examples, the tab structure 300 is disposed on the blade battery cell. An anode tab is provided at the first end of the blade battery cell, and a cathode tab is provided at the second end of the blade battery cell. Both the anode tab and the cathode tab are the tab structure 300.

[0080] The transition structure 100 includes an anode transition structure 100 adapted to the anode tab and a cathode transition structure 100 adapted to the cathode tab, and the cover plate 400 includes a top cover adapted to the anode tab and a bottom cover adapted to the cathode tab.

[0081] The anode tab is connected to the top cover via the anode transition structure 100 , and the cathode tab is connected to the bottom cover via the cathode transition structure 100 .

[0082] The tab structure 300 can be specifically arranged at a specific position of the blade cell. Specifically, an anode tab is configured at the first end of the blade cell, and a cathode tab is configured at the second end of the blade cell. The two tabs are respectively part of the tab structure 300, and each has different functions and roles. The anode tab is mainly responsible for conducting positive current, while the cathode tab is mainly responsible for conducting negative current.

[0083] Furthermore, the switching structure 100 includes two main parts, which are respectively adapted to the anode tab and the cathode tab. Specifically, the anode tab can be connected through the anode switching structure 100, and the cathode tab can be connected through the cathode switching structure 100. Such a design ensures smooth transmission of current and improves the stability and safety of the overall battery pack.

[0084] In addition, the cover plate 400 also includes two structures that are adapted to the tabs, namely the top cover and the bottom cover. The top cover is mainly adapted to the anode tab, while the bottom cover is mainly adapted to the cathode tab. With this design, the anode tab is connected to the top cover through the anode transfer structure 100, and the cathode tab is connected to the bottom cover through the cathode transfer structure 100. This connection method not only ensures the smooth transmission of current, but also makes the structure of the entire battery pack more compact and stable. Through this multi-level, multi-part adaptation and connection design, the overall performance of the battery pack has been significantly improved, and it also provides convenience for subsequent maintenance and overhaul.

[0085] In some examples, a positioning structure is disposed on the first adapter plate 110 , and the positioning structure is adapted to the tab structure 300 , and the positioning structure can limit the tab structure 300 .

[0086] The first adapter sheet 110 is provided with a positioning structure. The positioning structure matches the structure of the battery tab and can be closely matched with the tab structure 300. By setting the positioning structure, the position of the tab structure 300 can be effectively limited and fixed to ensure that it remains in a predetermined position during the battery assembly process, thereby improving the overall stability and reliability of the battery assembly. And the welding quality of the tab structure 300 can be guaranteed.

[0087] In some examples, the positioning structure is a positioning groove, and part of the tab structure 300 can be snapped into the positioning groove. The positioning grooves can be provided on both the first side and the second side of the first adapter piece 110 as required.

[0088] The positioning structure can be set as a positioning groove, and part of the tab structure 300 has the function of being able to be snapped into these positioning grooves. Specifically, the tab structure 300 can be firmly fixed in the positioning groove by snap connection, so as to achieve accurate positioning and connection.

[0089] After the two sides of the first adapter piece 110 are equipped with the above-mentioned positioning grooves. The positioning grooves can be evenly distributed on the two sides of the first adapter piece 110, ensuring that during the assembly process, the tab structure 300 can be smoothly and accurately snapped into the corresponding positions. In this way, the connection between the first adapter piece 110 and the tab structure 300 becomes more stable and reliable, thereby improving the welding efficiency of the tab structure 300 and increasing the stability and service life of the overall structure.

[0090] In some examples, the included angle between the first adapter piece 110 and the second adapter piece 120 is 90°±5°.

[0091] The angle between the first adapter piece 110 and the second adapter piece 120 is set to 90 degrees, allowing a small deviation of ±5 degrees. This means that the included angle between these two adapter pieces can be any value between 85 degrees and 95 degrees to ensure that the first adapter piece 110 and the second adapter piece 120 can be properly matched and connected.

[0092] The angle between the first adapter piece 110 and the second adapter piece 120 can also be set to 87°, 89°, 92°, 93°, etc. The angle between the first adapter piece 110 and the second adapter piece 120 can also be set to other angular values according to needs, not limited to the above angular range.

[0093] In some examples, a strengthening structure is provided at the connection between the first adapter piece 110 and the second adapter piece 120 to improve the connection strength and stability.

[0094] A strengthening structure is provided at the connection part between the first adapter piece 110 and the second adapter piece 120. The strengthening structure is used to enhance the strength and stability of the connection part, ensuring that the connection part can withstand greater loads and remain firm under various working conditions, thereby improving the reliability and service life of the overall battery structure.

[0095] At least one first adapter piece 110 is provided. When at least two first adapter pieces 110 are provided, the at least two first adapter pieces 110 are staggered.

[0096] In the above structure, there is at least one first adapter plate 110. When there are multiple first adapter plates 110, these first adapter plates 110 are arranged in a staggered manner to ensure the best fit and stability between the multiple first adapter plates 110. This staggered arrangement helps to improve the strength and reliability of the overall structure.

[0097] The intersection of the first adapter plate 110 and the second adapter plate 120 is an arc-shaped transition.

[0098] The first adapter plate 110 and the second adapter plate 120 adopt a curved surface transition design at the intersection. This design can not only reduce stress concentration, but also improve the strength and durability of the welding part. The shape of the curved surface transition helps to disperse the load, thereby avoiding material fatigue or fracture caused by concentrated stress to a certain extent.

[0099] At least one of the first adapter plate 110 and the second adapter plate 120 is provided with a reinforcing rib.

[0100] In order to further enhance the strength of the structure, reinforcing ribs are provided on at least one of the first adapter plate 110 and the second adapter plate 120. These reinforcing ribs can significantly improve the rigidity and bending resistance of the adapter plate, thereby ensuring that its shape and function can be maintained when subjected to a large load. The introduction of the reinforcing ribs is based on an in-depth analysis and optimized design of the mechanical environment that the adapter plate may encounter in actual applications.

[0101] In the second aspect, an embodiment of the present application further provides a battery pack, including a transfer structure 100 of the above-mentioned tab structure 300 and a shell, the shell having a receiving cavity, and the transfer structure 100, the tab structure 300, and the cover plate 400 are all arranged in the receiving cavity.

[0102] The battery pack with the above-mentioned adapter structure 100 can adopt the method of welding the two sides of the first adapter plate 110 separately, which significantly reduces the welding difficulty. This design not only simplifies the welding process, but also improves the stability and reliability of welding. Through this adapter structure 100, the multi-layer tab structure 300 can be effectively connected with the battery cover plate 400 to ensure the overall performance and safety of the battery.

[0103] In a third aspect, an embodiment of the present application further provides an electrical device, comprising the above-mentioned battery pack and a device body, wherein the device body has an assembly cavity, and the battery pack is disposed in the assembly cavity.

[0104] The electrical device having the above battery pack can adopt the method of welding on both sides of the first adapter piece 110, significantly reducing the welding difficulty. This design not only simplifies the welding process but also improves the stability and reliability of welding. Through this adapter structure 100, the multi-layer tab structure 300 can be effectively connected to the battery middle cover plate 400 to ensure the overall performance and safety of the battery.

[0105] The above electrical devices can be vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, power tools, energy storage devices, amusement devices, elevators and lifting devices, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles or range-extended electric vehicles, etc.; Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; Electric toys include fixed or mobile electric toys, for example, game consoles, electric vehicle toys, electric ship toys or electric airplane toys, etc.; Power tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators and electric planers, etc.; Energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; Amusement devices can be merry-go-rounds, drop towers, etc. This application does not impose special restrictions on the above electrical devices.

[0106] In the drawings of this application, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0107] The above are only the preferred examples of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A transfer structure of a tab structure, characterized in that: The tab structure is a multi-layer structure with more than 50 layers. Part of the transfer structure is connected to the tab structure, and part of the transfer structure is connected to the cover plate. The transfer structure includes: A first transfer piece, at least partially inserted into the middle of the tab structure. Part of the tab structure is connected to the first side surface of the first transfer piece, and the other part of the tab structure is connected to the second side surface of the first transfer piece; A second transfer piece, connected to the first transfer piece. The first transfer piece and the second transfer piece are arranged at an angle, and the second transfer piece can be connected to the cover plate.

2. The transfer structure of the tab structure according to claim 1, characterized in that: Part of the tab structure is connected to the first side surface of the first transfer piece by ultrasonic welding to form a first ultrasonic welding mark; The other part of the tab structure is connected to the second side surface of the first transfer piece by ultrasonic welding to form a second ultrasonic welding mark.

3. The transfer structure of the tab structure according to claim 2, characterized in that: The first ultrasonic welding mark and the second ultrasonic welding have the same size, and the projection of the first ultrasonic welding mark relative to the first transfer piece can overlap with the second ultrasonic welding mark; or, The first ultrasonic welding mark and the second ultrasonic welding have the same size, and the projection of the first ultrasonic welding mark relative to the first transfer piece can intersect with the second ultrasonic welding mark; or, The first ultrasonic welding mark and the second ultrasonic welding have different sizes, and the projection of the first ultrasonic welding mark relative to the first transfer piece can at least partially overlap with the second ultrasonic welding mark; or, The first ultrasonic welding mark and the second ultrasonic welding have different sizes, and the projection of the first ultrasonic welding mark relative to the first transfer piece can intersect with the second ultrasonic welding mark.

4. The transfer structure of the tab structure according to any one of claims 1 to 3, characterized in that: The tab structure is arranged on a blade battery cell. An anode tab is arranged at the first end of the blade battery cell, and a cathode tab is arranged at the second end of the blade battery cell. Both the anode tab and the cathode tab are the tab structures; The transfer structure includes an anode transfer structure adapted to the anode tab and a cathode transfer structure adapted to the cathode tab. The cover plate includes a top cover adapted to the anode tab and a bottom cover adapted to the cathode tab; The anode tab is connected to the top cover through the anode transfer structure, and the cathode tab is connected to the bottom cover through the cathode transfer structure.

5. The adapter structure of the tab structure according to claim 4, wherein A positioning structure is arranged on the first transfer piece. The positioning structure is adapted to the tab structure and can limit the tab structure.

6. The transfer structure of the tab structure according to claim 5, characterized in that: The positioning structure is a positioning groove, and part of the tab structure can be snapped into the positioning groove.

7. The adapter structure of the tab structure according to claim 1, characterized in that The included angle between the first transfer piece and the second transfer piece is 90° ± 5°.

8. The transfer structure of the tab structure according to claim 1, characterized in that: A strengthening structure is arranged at the connection between the first transfer piece and the second transfer piece.

9. A battery pack, characterized in that, Including: The transfer structure of the tab structure according to any one of claims 1 to 8; And, A housing having a receiving cavity. The transfer structure, the tab structure, and the cover plate are all arranged in the receiving cavity.

10. An electrical device, characterized in that, Including: The battery pack according to claim 9; And, An equipment main body having an assembly cavity. The battery pack is arranged in the assembly cavity.

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