Pole lug reverse insertion prevention structure and battery

Abstract

The utility model relates to the technical field of battery accessories, and provides a tab inverted insertion prevention structure and a battery. The tab inverted insertion prevention structure comprises a first clamping plate and a second clamping plate which are connected with each other to form a clamping plate group, and the first clamping plate and the second clamping plate are oppositely arranged in the width direction of the clamping plate group; a containing groove is formed in the first clamping plate, a first opening is formed in the side, facing the second clamping plate, of the containing groove in the first clamping plate, and a second opening is formed in the side, in the thickness direction of the clamping plate set, of the first clamping plate. The second clamping plate is provided with a shaping bulge, and the shaping bulge is arranged in the accommodating groove through the second opening and is separated from the inner wall of the accommodating groove, so that a constraint channel for the pole lug to pass through is formed between the first clamping plate and the second clamping plate; the restraining channel comprises a plurality of channel sections arranged in sequence, every two adjacent channel sections are inclined to each other, and the channel sections at the two ends of the restraining channel extend in the thickness direction of the clamping plate set. The plurality of channel sections bend the tabs to disperse stress, optimize a stress transfer path and avoid inverted insertion of the roots of the tabs.

Description

Technical Field

[0001] This application relates to the field of battery accessory technology, and in particular to a tab anti-reverse insertion structure and a battery. Background Technology

[0002] In the battery manufacturing process, the tabs of the battery cell, as the key connecting components between the current collector and the top cover, are usually composed of multiple layers of metal foil as current collectors.

[0003] During battery assembly, the tabs and the flexible connecting piece of the top cover must first be welded and fixed, then the battery cell is placed into the housing and the sealing connection between the top cover and the housing is completed.

[0004] However, during the pressing stage of cell installation into the casing, the top cover will apply assembly pressure to the tabs when it moves toward the cell. The tabs bend and deform under pressure, and the current collector at the root of the tabs is subjected to greater force and is easily inserted into the cell, causing safety hazards such as damage to the electrode coating and internal short circuits of the cell, affecting the cell's electrical performance and safety. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, this application provides a tab anti-reverse insertion structure and a battery.

[0006] The first aspect of this application provides a tab anti-reverse insertion structure, including a first clamping plate and a second clamping plate connected to each other to form a clamping plate assembly, wherein the first clamping plate and the second clamping plate are disposed opposite to each other along the width direction of the clamping plate assembly;

[0007] The first clamping plate is provided with a receiving groove, the receiving groove having a first opening on the side of the first clamping plate facing the second clamping plate and a second opening on the side of the first clamping plate along the thickness direction of the clamping plate assembly;

[0008] The second clamping plate is provided with a shaping protrusion, which is inserted into the receiving groove through the second opening and spaced from the inner wall of the receiving groove, so that a constraint channel for the electrode tab to pass through is formed between the first clamping plate and the second clamping plate.

[0009] The constraint channel includes multiple channel segments arranged in sequence, with each pair of adjacent channel segments inclined to each other, and the channel segments at both ends of the constraint channel extending along the thickness direction of the clamping plate assembly.

[0010] Optionally, the first clamping plate and the second clamping plate are respectively formed with a first side surface and a second side surface on opposite sides;

[0011] The first opening is formed on the first side surface, the shaping protrusion is formed on the second side surface, the shaping protrusion and the receiving groove are spaced apart from the side wall of the second clamping plate along the width direction of the clamping plate assembly to form a first channel, the shaping protrusion and the bottom wall of the receiving groove are spaced apart to form a second channel, and the first side surface and the second side surface are spaced apart to form a third channel.

[0012] The first channel and the third channel extend along the height direction of the clamping plate assembly, and the second channel extends along the width direction of the clamping plate assembly. The first channel, the second channel, and the third channel are sequentially connected along the height direction of the clamping plate assembly to form the constraint channel.

[0013] Optionally, a first arc surface is formed on the first side, and the first arc surface is disposed on one side of the first opening along the thickness direction of the clamping plate assembly; a second arc surface is formed on the second side, and the second arc surface is disposed on one side of the shaping protrusion along the thickness direction of the clamping plate assembly.

[0014] The first arc surface and the second arc surface are arranged opposite each other along the width direction of the clamping plate assembly, and both are used to abut the pole tab;

[0015] In the direction away from the assembly point of the receiving groove and the shaping protrusion, the distance between the first arc surface and the second arc surface gradually increases along the width direction of the clamping plate assembly.

[0016] Optionally, the first clamping plate has a recessed mounting groove on the side facing the second clamping plate, the opening of the mounting groove faces the second clamping plate, and notches are formed on both side walls of the mounting groove along the thickness direction of the clamping plate assembly. The bottom of the mounting groove is the first side, so that the first side and the second side are spaced apart.

[0017] Optionally, the first clamping plate is provided with a first snap-fit ​​portion, and the second clamping plate is provided with a second snap-fit ​​portion. The first snap-fit ​​portion and the second snap-fit ​​portion are arranged opposite to each other along the width direction of the clamping plate assembly and can snap into each other.

[0018] The first snap-fit ​​portion and the receiving groove are spaced apart along the length direction of the clamping plate assembly, and the second snap-fit ​​portion and the shaping protrusion are spaced apart along the length direction of the clamping plate assembly.

[0019] Optionally, the first snap-fit ​​portion includes an extension plate and a buckle. The extension plate extends toward the second clamping plate along the width direction of the clamping plate assembly. The buckle is formed at the end of the extension plate away from the first clamping plate and protrudes from one side of the extension plate along the thickness direction of the clamping plate assembly.

[0020] The second snap-fit ​​portion includes a snap-fit ​​groove, wherein a guide opening is formed on the side of the second clamping plate facing the first clamping plate, and a snap-fit ​​interface is formed on the side of the second clamping plate along the thickness direction of the clamping plate assembly;

[0021] The extension plate is inserted into the snap-fit ​​groove through the guide opening along the width direction of the clamping plate assembly, so that the buckle is snapped into the snap-fit ​​interface.

[0022] Optionally, there are multiple first snap-fit ​​portions, which are spaced apart along the length of the clamping plate assembly; there are also multiple second snap-fit ​​portions, which are spaced apart along the length of the clamping plate assembly.

[0023] Multiple first snap-fit ​​portions and multiple second snap-fit ​​portions correspond one-to-one along the width direction of the clamping plate assembly. The receiving groove is disposed between two adjacent first snap-fit ​​portions, and the shaping protrusion is disposed between two adjacent second snap-fit ​​portions.

[0024] Optionally, the number of receiving slots is two, and the two receiving slots are spaced apart along the length direction of the clamping plate assembly;

[0025] The number of shaping protrusions is two, and the two shaping protrusions are spaced apart along the length direction of the clamping plate assembly; the two shaping protrusions and the two receiving grooves are matched one-to-one to form two constraint channels, and the two constraint channels respectively pass through the two tabs of the battery cell.

[0026] Optionally, both the first clamp and the second clamp are provided with guide ports for the passage of electrolyte.

[0027] A second aspect of this application provides a battery, including a cell and a tab anti-reverse insertion structure as described in any of the preceding claims;

[0028] The battery cell has tabs on its surface. The clamping plate assembly is disposed on the side of the battery cell with the tabs and abuts against the battery cell. The tabs are inserted into the constraint channel so that the end of the tabs away from the battery cell is exposed on the side of the clamping plate assembly facing away from the battery cell.

[0029] The technical solution provided in this application has the following advantages compared with the prior art:

[0030] The anti-reverse insertion structure for the tabs provided in this application includes a first clamping plate and a second clamping plate connected to each other to form a clamping plate assembly. A constraint channel is formed between the first and second clamping plates through the cooperation of a shaping protrusion and a receiving groove. When the tab is inserted into the constraint channel, the geometry of the constraint channel actively guides and constrains the deformation path of the tab. During battery assembly, when the top cover presses down on the tab, the tip of the tab deforms due to the pressure, and the multiple mutually inclined channel segments within the constraint channel force the tab to bend at multiple locations. This segmented bending design decomposes the force of the top cover pressing down into multiple components along the extension direction of the tab, and at each bend, part of the force is transferred to the clamping plate assembly through the contact between the tab and the sidewall of the constraint channel, rather than being directly transmitted to the root of the tab. Through this optimization of the mechanical transmission path, the stress on the root of the tab is reduced, preventing excessive force on the root of the tab from causing it to be inserted backwards into the battery cell. Meanwhile, the stabilizing effect of the constraint channel on the overall shape of the electrode tab can ensure the welding position accuracy between the electrode tab and the top cover, thereby improving the electrical performance and long-term safety of the battery cell. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a top view of the anti-reverse insertion structure of the electrode tabs described in the embodiments of this application;

[0034] Figure 2 for Figure 1 Sectional view along axis AA;

[0035] Figure 3 for Figure 1 Sectional view of the first clamping plate along line AA;

[0036] Figure 4 for Figure 1 Sectional view along line AA of the second middle clamping plate;

[0037] Figure 5 for Figure 1 BB-direction sectional view;

[0038] Figure 6 This is an assembly diagram of the anti-reverse insertion structure of the electrode tab and the battery cell described in the embodiments of this application;

[0039] Figure 7 This is an assembly diagram of the tab anti-reverse insertion structure and the dual-cell structure described in the embodiments of this application.

[0040] Among them, 1. First clamping plate; 11. Receiving groove; 111. First opening; 112. Second opening; 12. First side; 121. First arc surface; 13. First snap-fit ​​part; 131. Extension plate; 132. Buckle; 14. Guide port; 2. Second clamping plate; 21. Shaping protrusion; 22. Second side; 221. Second arc surface; 23. Second snap-fit ​​part; 231. Guide port; 232. Snap-fit ​​interface; 3. Constraint channel; 31. First channel; 32. Second channel; 33. Third channel; 4. Battery cell; 41. Electrode; 42. Top cover. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0043] Reference Figures 1 to 7 As shown, the first aspect of this application provides an anti-reverse insertion structure for an electrode tab, including a first clamping plate 1 and a second clamping plate 2 connected to each other to form a clamping plate assembly. The first clamping plate 1 and the second clamping plate 2 are arranged opposite each other along the width direction of the clamping plate assembly. The first clamping plate 1 is provided with a receiving groove 11, the receiving groove 11 having a first opening 111 on the side of the first clamping plate 1 facing the second clamping plate 2 and a second opening 112 on the side of the first clamping plate 1 along the thickness direction of the clamping plate assembly. The second clamping plate 2 is provided with a shaping protrusion 21, the shaping protrusion 21 being inserted into the receiving groove 11 through the second opening 112 and spaced from the inner wall of the receiving groove 11, so that a constraint channel 3 for the electrode tab 41 to pass through is formed between the first clamping plate 1 and the second clamping plate 2. The constraint channel 3 includes a plurality of channel segments arranged in sequence, each pair of adjacent channel segments being inclined to each other, and the channel segments at both ends of the constraint channel 3 extending along the thickness direction of the clamping plate assembly.

[0044] Specifically, Figure 1 The directions indicated by the middle arrows are the width direction X, length direction Y, and thickness direction Z of the clamping plate assembly. The thickness direction Z of the clamping plate assembly is perpendicular to the width direction X and the length direction Y, and the length direction Y is perpendicular to the width direction X.

[0045] The first clamping plate 1 and the second clamping plate 2 mentioned above can be connected to each other by snap-fit ​​connection or by fasteners, so that the first clamping plate 1 and the second clamping plate 2 are connected to each other to form a clamping plate assembly.

[0046] The first clamping plate 1 and the second clamping plate 2 mentioned above are both long strip plate structures. The first clamping plate 1 is processed to form a receiving groove 11 along the thickness direction Z. The receiving groove 11 is provided with a through hole on the side wall of the second clamping plate 2 along the width direction X. The through hole is exposed on the side of the first clamping plate 1 facing the second clamping plate 2, so that the through hole on the side wall of the receiving groove 11 serves as the first opening 111 and the groove opening of the receiving groove 11 serves as the second opening 112.

[0047] The shape of the second clamping plate 2 is symmetrical to that of the first clamping plate 1. The side of the second clamping plate 2 facing the first clamping plate 1 is provided with a shaping protrusion 21. The shaping protrusion 21 can be a block or a plate structure. The shaping protrusion 21 extends towards the first clamping plate 1 along the width direction X, so that the shaping protrusion 21 can be inserted into the receiving groove 11 through the first opening 111.

[0048] The shaping protrusion 21 is spaced apart from the inner wall of the receiving groove 11, so that the space between the shaping protrusion 21 and the bottom wall of the receiving groove 11 forms a channel segment extending along the thickness direction Z. The shaping protrusion 21 and the side wall of the receiving groove 11 are spaced apart along the width direction X to form a channel segment extending along the thickness direction Z. The first clamping plate 1 has a first surface on the side facing the second clamping plate 2, and the first surface is on the side of the first opening 111 along the thickness direction Z. The second clamping plate 2 has a second surface on the side facing the first clamping plate 1, and the second surface is on the side of the shaping protrusion 21 along the thickness direction Z. The first surface and the second surface are opposite to each other along the width direction X and spaced apart from each other to form a channel segment extending along the thickness direction Z. The three channel segments are connected to each other to form a constraint channel 3.

[0049] Alternatively, the shaping protrusion 21 can be configured with a multi-level first step structure at the end near the first clamping plate 1, and the inner wall of the receiving groove 11 facing the step structure can be configured with a second step structure that cooperates with the first step structure. The multi-level steps of the first step structure and the multi-level steps of the second step structure are spaced out in a one-to-one correspondence, so that multiple channel segments extending in different directions are formed between the shaping protrusion 21 and the receiving groove 11.

[0050] A tab 41 is provided on one side of the battery cell 4. A first clamping plate 1 and a second clamping plate 2 are provided on both sides of the tab 41 and are connected to each other. The tab 41 is clamped between the first clamping plate 1 and the second clamping plate 2. The tab 41 is in the constraint channel 3 and abuts against the inner wall of the constraint channel 3 so that the constraint channel 3 restricts the tab 41. The tab 41 first enters the constraint channel 3 through the channel section close to the battery cell 4, and then exits from the channel section away from the battery cell 4. When the tab 41 is compressed and deforms toward the battery cell 4, the multiple mutually inclined channel sections can change the direction of force transmission on the tab 41 and distribute the force on the tab 41 to different channel sections, reducing the force transmitted to the root of the tab 41 when the top cover is pressed down, and preventing the root of the tab 41 from being inserted into the battery cell 4.

[0051] The anti-reverse insertion structure for the electrode tabs provided in this application includes a first clamping plate 1 and a second clamping plate 2 connected to each other to form a clamping plate assembly. A constraint channel 3 is formed between the first clamping plate 1 and the second clamping plate 2 through the cooperation of the shaping protrusion 21 and the receiving groove 11. When the electrode tab 41 is inserted into the constraint channel 3, the geometry of the constraint channel 3 can actively guide and constrain the deformation path of the electrode tab 41. During battery assembly, when the top cover 42 presses down to apply pressure to the electrode tab 41, the top of the electrode tab 41 deforms due to the pressure, and the multiple mutually inclined channel segments within the constraint channel 3 force the electrode tab 41 to bend at multiple locations. This segmented bending design decomposes the force of the top cover 42 pressing down into multiple components along the extension direction of the electrode tab 41, and at each bend, transfers part of the force to the clamping plate assembly through the contact between the electrode tab 41 and the sidewall of the constraint channel 3, rather than directly transmitting it to the root of the electrode tab 41. By optimizing the mechanical transmission path, the stress on the root of the tab 41 is reduced, preventing excessive force on the root of the tab 41 from causing it to be inserted upside down into the cell 4. At the same time, the stabilizing effect of the constraint channel 3 on the overall shape of the tab 41 ensures the welding position accuracy between the tab 41 and the top cover, thereby improving the electrical performance and long-term safety of the cell.

[0052] In specific use, the anti-reverse insertion structure of the electrode provided in this application embodiment is used by placing the first clamping plate 1 and the second clamping plate 2 on both sides of the electrode 41, with the first clamping plate 1 and the second clamping plate 2 close to each other and connected to each other, so that the electrode 41 is clamped in the constraint channel 3 between the first clamping plate 1 and the second clamping plate 2. Then, the electrode 41 is connected to the top cover of the battery, and the top cover and the battery cell are pressed into the battery casing to complete the battery assembly.

[0053] Reference Figures 1 to 4As shown, in some embodiments, a first side 12 and a second side 22 are formed on opposite sides of the first clamping plate 1 and the second clamping plate 2, respectively; a first opening 111 is formed on the first side 12, and a shaping protrusion 21 is formed on the second side 22. The shaping protrusion 21 and the receiving groove 11 are spaced apart from the side wall of the second clamping plate 2 along the width direction of the clamping plate assembly to form a first channel 31. The shaping protrusion 21 and the bottom wall of the receiving groove 11 are spaced apart to form a second channel 32. The first side 12 and the second side 22 are spaced apart to form a third channel 33. The first channel 31 and the third channel 33 extend along the height direction of the clamping plate assembly, and the second channel 32 extends along the width direction of the clamping plate assembly. The first channel 31, the second channel 32 and the third channel 33 are sequentially connected along the height direction of the clamping plate assembly to form a constraint channel 3.

[0054] With this configuration, the tab 41 passes through the first channel 31, the second channel 32 and the third channel 33 in sequence, forming a "Z" shaped bending path. This allows the force along the thickness direction Z on the portion of the tab 41 in the first channel 31 to be transmitted to the bottom of the receiving groove 11, reducing the force along the thickness direction Z on the tab 41 in the third channel 33.

[0055] Specifically, the top side of the first clamping plate 1 is the side where the second opening 112 of the receiving groove 11 is exposed on the first clamping plate 1. The bottom side of the first clamping plate 1 faces the battery cell 4, and the top side of the first clamping plate 1 faces the top cover. When the second clamping plate 2 is connected to the first clamping plate 1, it is on the same plane. The shaping protrusion 21 can be set on the second side 22 near the top side of the second clamping plate 2.

[0056] The first channel 31 is formed by the space between the side wall of the receiving groove 11 away from the second clamping plate 2 and the shaping protrusion 21; the space between the shaping protrusion 21 and the bottom of the receiving groove 11 forms the second channel 32, so that the first channel 31 is on the top side of the second channel 32.

[0057] The portion of the first side 12 at the bottom of the first opening 111 forms the sidewall of the third channel 33, and the portion of the second side 22 at the bottom of the shaping protrusion 21 forms the sidewall of the third channel 33, so that the space between the first side 12 and the second side 22 forms the third channel 33, which is located at the bottom of the second channel 32; the bottom of the tab 41 is inside the third channel 33, so that the first side 12 and the second side 22 can abut against the two sides of the tab 41 to constrain the shape of the tab 41.

[0058] Reference Figures 1 to 4As shown, in some embodiments, a first arc surface 121 is formed on the first side surface 12, and the first arc surface 121 is disposed on one side of the first opening 111 along the thickness direction of the clamping plate assembly; a second arc surface 221 is formed on the second side surface 22, and the second arc surface 221 is disposed on one side of the shaping protrusion 21 along the thickness direction of the clamping plate assembly; the first arc surface 121 and the second arc surface 221 are disposed opposite to each other along the width direction of the clamping plate assembly, and both are used to abut against the electrode tab 41; in the direction away from the assembly point of the receiving groove 11 and the shaping protrusion 21, the distance between the first arc surface 121 and the second arc surface 221 along the width direction of the clamping plate assembly gradually increases.

[0059] With this configuration, the first arc surface 121 and the second arc surface 221 abut against both sides of the root of the electrode tab 41, which improves the stability of the shape of the root of the electrode tab 41. Furthermore, the flared shape formed by the first arc surface 121 and the second arc surface 221 can adapt to the shape of the root of the electrode tab 41. The arc surface guides the electrode tab 41 smoothly into the constraint channel, reducing frictional resistance; the gradually expanding gap design of the flared structure prevents the electrode tab from breaking due to stress concentration at the corner.

[0060] Specifically, the first arc surface 121 is on the side of the first opening 111 near the battery cell 4, and the second arc surface 221 is on the side of the shaping protrusion 21 near the battery cell 4. The first arc surface 121 and the second arc surface 221 are arranged opposite each other in the width direction X. In the direction away from the assembly point of the receiving groove 11 and the shaping protrusion 21, the distance between the first arc surface 121 and the second arc surface 221 gradually increases, so that the first arc surface 121 and the second arc surface 221 form a flared structure.

[0061] The tab 41 on the battery cell 4 is formed by connecting multiple current collectors. The multiple current collectors are all connected to the battery cell 4 and arranged on the surface of the battery cell 4. Therefore, the part of the tab 41 near the battery cell 4 is larger and approximately conical. The horn-shaped structure formed by the first arc surface 121 and the second arc surface 221 can adapt to the shape of the tab 41.

[0062] Reference Figures 1 to 4 As shown, in some embodiments, the first clamping plate 1 has a recessed mounting groove on the side facing the second clamping plate 2, the opening of the mounting groove faces the second clamping plate 2, and notches are formed on both side walls of the mounting groove along the thickness direction of the clamping plate assembly. The bottom of the mounting groove is the first side 12, so that the first side 12 and the second side 22 are spaced apart.

[0063] With this configuration, the assembly groove separates the first side 12 from the second side, and the portion of the first clamping plate 1 facing the second clamping plate 2 on the outside of the assembly groove can fit against the second clamping plate 2, thereby improving the stability of the connection between the first clamping plate 1 and the second clamping plate 2.

[0064] Specifically, a portion of the side of the first clamping plate 1 facing the second clamping plate 2 is recessed to form an assembly groove, so that the remaining portion of the side of the first clamping plate 1 facing the second clamping plate 2 can fit against the second clamping plate 2; the bottom of the assembly groove is spaced apart from the second clamping plate 2, and the first opening 111 is exposed on the bottom of the assembly groove, so that the bottom of the assembly groove is spaced apart from the second clamping plate 2 to form a third channel 33.

[0065] Reference Figure 1 and Figure 5 As shown, in some embodiments, the first clamping plate 1 is provided with a first snap-fit ​​portion 13, and the second clamping plate 2 is provided with a second snap-fit ​​portion 23. The first snap-fit ​​portion 13 and the second snap-fit ​​portion 23 are arranged opposite to each other along the width direction of the clamping plate assembly and can snap into each other. The first snap-fit ​​portion 13 and the receiving groove 11 are spaced apart along the length direction of the clamping plate assembly, and the second snap-fit ​​portion 23 and the shaping protrusion 21 are spaced apart along the length direction of the clamping plate assembly.

[0066] With this configuration, the first snap-fit ​​part 13 and the second snap-fit ​​part 23 can be snapped together to connect the first clamping plate 1 and the second clamping plate 2, improving the ease of connection between them. The snap-fit ​​structure simplifies the assembly process, avoids material damage caused by welding or bolting, and prevents the clamping plate assembly from loosening under vibration.

[0067] Specifically, the first snap-fit ​​part 13 can be selected as an elastic buckle, and the second snap-fit ​​part 23 can be selected as a slot. When the first clamping plate 1 and the second clamping plate 2 are close to each other, the elastic buckle can be snapped into the slot, so that the first snap-fit ​​part 13 and the second snap-fit ​​part 23 are snapped together.

[0068] Alternatively, the first snap-fit ​​part 13 can be a protruding structure, and the second snap-fit ​​part 23 can be a groove. The groove has claws on both sides opposite to each other. After the protruding structure is inserted into the groove, the two claws cooperate with each other to snap-fit ​​the protruding structure, so that the first snap-fit ​​part 13 and the second snap-fit ​​part 23 are snap-fitted together.

[0069] Reference Figure 1 and Figure 5 As shown, in some embodiments, the first snap-fit ​​portion 13 includes an extension plate 131 and a buckle 132. The extension plate 131 extends toward the second clamping plate 2 along the width direction of the clamping plate assembly. The buckle 132 is formed at the end of the extension plate 131 away from the first clamping plate 1 and protrudes from one side of the extension plate 131 along the thickness direction of the clamping plate assembly. The second snap-fit ​​portion 23 includes a snap-fit ​​groove. The snap-fit ​​groove has a guide opening 231 on the side of the second clamping plate 2 facing the first clamping plate 1 and a snap-fit ​​interface 232 on the side of the second clamping plate 2 along the thickness direction of the clamping plate assembly. The extension plate 131 is inserted into the snap-fit ​​groove through the guide opening 231 along the width direction of the clamping plate assembly so that the buckle 132 is snapped into the snap-fit ​​interface 232.

[0070] With this configuration, the buckle 132 is inserted into the card interface 232, and the card interface 232 forms a limit on the buckle 132 in the width direction, preventing the buckle 132 and the extension plate 131 from coming out of the card slot; the first clamping plate 1 and the second clamping plate 2 move closer to each other, so that the extension plate 131 can be inserted into the card slot. The mutual snap-fit ​​connection can be completed during the clamping of the electrode tab 41 by the first clamping plate 1 and the second clamping plate 2, improving the convenience of the mutual connection between the first clamping plate 1 and the second clamping plate 2.

[0071] Specifically, the extension plate 131 is disposed on the first side 12 and extends towards the second clamping plate 2 along the width direction X, and the buckle 132 protrudes from the extension plate 131. The snap-fit ​​groove has a guide opening 231 formed on the side of the second clamping plate 2 along the width direction X towards the first clamping plate 1, that is, the guide opening 231 is formed on the second side 22. The extension plate 131 is inserted into the snap-fit ​​groove through the guide opening 231, so that the buckle 132 enters the snap-fit ​​interface 232. The side of the buckle 132 near the first clamping plate 1 can abut against the side of the snap-fit ​​interface 232 near the first clamping plate 1, thereby preventing the extension plate 131 and the buckle 132 from coming out of the snap-fit ​​groove.

[0072] The aforementioned extension plate 131 can be an elastic element, or both the extension plate 131 and the buckle 132 can be elastic elements, so that during the process of inserting the extension plate 131 into the card slot, the buckle 132 is snapped into the card interface 232 through elastic deformation.

[0073] Reference Figures 1 to 4 As shown, in some embodiments, there are multiple first snap-fit ​​portions 13, which are spaced apart along the length of the clamping plate assembly; there are multiple second snap-fit ​​portions 23, which are spaced apart along the length of the clamping plate assembly; the multiple first snap-fit ​​portions 13 and the multiple second snap-fit ​​portions 23 correspond one-to-one along the width of the clamping plate assembly; the receiving groove 11 is disposed between two adjacent first snap-fit ​​portions 13; and the shaping protrusion 21 is disposed between two adjacent second snap-fit ​​portions 23.

[0074] With this configuration, multiple first snap-fit ​​parts 13 are connected to multiple second snap-fit ​​parts 23, which enables multiple connection points between the first clamping plate 1 and the second clamping plate 2, thereby improving the stability when the first snap-fit ​​parts 13 and the second snap-fit ​​parts 23 are connected to each other.

[0075] Specifically, the number of first locking parts 13 can be three, with two first locking parts 13 at both ends of the first clamping plate 1 along the length direction Y, and the remaining first locking part 13 in the middle of the first clamping plate 1 along the length direction Y; the number of second locking parts 23 can be three, with two second locking parts 23 at both ends of the second clamping plate 2 along the length direction Y, and the remaining second locking part 23 in the middle of the second clamping plate 2 along the length direction Y, and the three first locking parts 13 can be locked and connected one-to-one with the three second locking parts 23.

[0076] Alternatively, the number of first snap-fit ​​parts 13 can be two, with the two first snap-fit ​​parts 13 located at both ends of the first clamping plate 1 along the length direction Y, and the number of second snap-fit ​​parts 23 can be two, with the two second snap-fit ​​parts 23 located at both ends of the second clamping plate 2 along the length direction Y. The two first snap-fit ​​parts 13 can be snap-fitted and connected one-to-one with the two second snap-fit ​​parts 23.

[0077] Reference Figures 1 to 4 As shown, in some embodiments, there are two receiving slots 11, which are spaced apart along the length of the clamping plate assembly; there are two shaping protrusions 21, which are spaced apart along the length of the clamping plate assembly; the two shaping protrusions 21 and the two receiving slots 11 are matched one-to-one to form two constraint channels 3, and the two constraint channels 3 respectively pass through the two tabs 41 of the battery cell 4.

[0078] With this configuration, the two receiving slots 11 and the two shaping protrusions 21 can form two constraint channels 3, and the two constraint channels 3 can simultaneously constrain the two tabs 41.

[0079] Specifically, when the first clamping plate 1 is provided with three first snap-fit ​​parts 13, two receiving grooves 11 are respectively provided between each two adjacent first snap-fit ​​parts 13 in the three first snap-fit ​​parts 13; when the second clamping plate 2 is provided with three second snap-fit ​​parts 23, two shaping protrusions 21 are respectively provided between each two adjacent second snap-fit ​​parts 23 in the three second snap-fit ​​parts 23.

[0080] When the second clamping plate 2 is provided with two first snap-fit ​​parts 13, the two receiving grooves 11 can be optionally disposed between the two first snap-fit ​​parts 13. When the second clamping plate 2 is provided with two second snap-fit ​​parts 23, the two shaping protrusions 21 are disposed between the two second snap-fit ​​parts 23.

[0081] Some models of battery cells 4 have two tabs 41 on the top side, so that the two tabs 41 correspond to the positive and negative terminals of the battery respectively. The two tabs 41 form a tab mounting area on the battery cell 4. The first clamping plate 1 and the second clamping plate 2 are on both sides of the tab mounting area. The first clamping plate 1 and the second clamping plate 2 are connected to each other, so that the two tabs 41 can be inserted into the two constraint channels 3 respectively.

[0082] Reference Figures 1 to 4 As shown, in some embodiments, both the first clamping plate 1 and the second clamping plate 2 are provided with guide ports 14 for the passage of electrolyte.

[0083] With this configuration, after the first clamping plate 1 and the second clamping plate 2 are placed on one side of the battery cell 4, the staff can inject electrolyte into the battery cell 4 through the flow port 14; the flow port 14 can also reduce the materials used on the first clamping plate 1 and the second clamping plate 2, and reduce the weight of the first clamping plate 1 and the second clamping plate 2.

[0084] Specifically, both the first clamping plate 1 and the second clamping plate 2 are provided with a guide port 14 that runs through the first clamping plate 1 and the second clamping plate 2 along the thickness direction Z; the battery cell 4 needs to be filled with electrolyte, and the battery cell 4 is provided with an injection hole. The guide port 14 is set opposite to the injection hole. The first clamping plate 1 and the second clamping plate 2 are connected to each other and set on one side of the battery cell 4, and the guide port 14 is set opposite to the injection hole. The staff can inject electrolyte into the injection hole through the guide port 14.

[0085] Reference Figures 1 to 7 As shown, a second aspect of the present application provides a battery, including a battery cell 4 and a tab anti-reverse insertion structure as described in any of the above claims; the battery cell 4 has a tab 41 on its surface, and a clamping plate assembly is disposed on the side of the battery cell 4 where the tab 41 is provided and abuts against the battery cell 4, and the tab 41 passes through the constraint channel 3 so that the end of the tab 41 away from the battery cell 4 is exposed on the side of the clamping plate assembly facing away from the battery cell 4.

[0086] Specifically, the battery has a casing and a top cover 42. The battery cell 4 is placed inside the casing. A tab 41 is provided on one side of the battery cell 4. The end of the tab 41 closest to the battery cell 4 is the root of the tab 41. The tab 41 is connected to the top cover 42, and the top cover 42 is connected to the casing. A first clamping plate 1 and a second clamping plate 2 are placed on the side of the battery cell 4 where the tab 41 is provided, so that the clamping plate assembly formed by the first clamping plate 1 and the second clamping plate 2 are connected to each other between the battery cell 4 and the top cover 42 of the battery.

[0087] The aforementioned tab 41 is inserted into the constraint channel 3, and the top of the tab 41 passes through the constraint channel 3 on the side of the clamping plate assembly facing away from the cell 4, so that the top of the tab 41 can be connected to the top cover 42 of the battery.

[0088] By using the above-mentioned anti-reverse insertion structure for the electrode tab in the battery, the first clamping plate 1 and the second clamping plate 2 clamp the electrode tab 41, so that the first clamping plate 1 and the second clamping plate 2 constrain the shape of the electrode tab 41. When the top cover 42 presses down on the electrode tab 41, the electrode tab 41 bends in the constraint channel 3. The force of the top cover 42 pressing down changes direction at the bending point of the electrode tab 41, reducing the force transmitted to the root of the electrode tab 41 and preventing the root of the electrode tab 41 from being inserted into the cell 4.

[0089] When the anti-reverse insertion structure and battery provided in this application embodiment are used, the first clamping plate 1 and the second clamping plate 2 are placed on both sides of the electrode tab 41, with the first clamping plate 1 and the second clamping plate 2 close to each other, so that the extension plate 131 is inserted into the snap-fit ​​groove through the guide port 231, and the buckle 132 is snapped into the snap-fit ​​interface 232; multiple first snap-fit ​​parts 13 are correspondingly snap-fitted and connected to multiple second snap-fit ​​parts 23, so that the first clamping plate 1 and the second clamping plate 2 are connected to each other.

[0090] The tab 41 is clamped in the constraint channel 3, the root of the tab 41 is in the third channel 33, and the first arc surface 121 and the second arc surface 221 abut against the two sides of the tab 41. The top of the tab 41 extends out of the constraint channel 3, so that the top of the tab 41 is on the side of the clamping plate assembly facing away from the cell 4. The top of the tab 41 is welded to the top cover 42. The cell 4 is installed in the battery casing, and the top cover 42 is pressed down to connect with the battery casing. The force exerted by the top cover 42 on the tab 41 is transmitted along the tab 41, and the force is transmitted to the first clamping plate 1 and the second clamping plate 2 at the bending point of the tab 41.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0092] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tab anti-reverse insertion structure, characterized in that, It includes a first clamping plate (1) and a second clamping plate (2) that are connected to each other to form a clamping plate assembly, wherein the first clamping plate (1) and the second clamping plate (2) are arranged opposite to each other along the width direction of the clamping plate assembly; The first clamping plate (1) is provided with a receiving groove (11), and the receiving groove (11) has a first opening (111) on the side of the first clamping plate (1) facing the second clamping plate (2) and a second opening (112) on the side of the first clamping plate (1) along the thickness direction of the clamping plate assembly. The second clamping plate (2) is provided with a shaping protrusion (21), which is inserted into the receiving groove (11) through the second opening (112) and spaced from the inner wall of the receiving groove (11) so that a constraint channel (3) for the electrode tab (41) to pass through is formed between the first clamping plate (1) and the second clamping plate (2); The constraint channel (3) includes multiple channel segments arranged in sequence, with each pair of adjacent channel segments inclined to each other, and the channel segments at both ends of the constraint channel (3) extending along the thickness direction of the clamping plate assembly.

2. The anti-reverse insertion structure for the electrode tabs according to claim 1, characterized in that, The first clamping plate (1) and the second clamping plate (2) have a first side surface (12) and a second side surface (22) respectively formed on opposite sides; The first opening (111) is formed on the first side (12), the shaping protrusion (21) is formed on the second side (22), the shaping protrusion (21) and the receiving groove (11) are spaced apart from the side wall of the second clamp (2) along the width direction of the clamp assembly to form a first channel (31), the shaping protrusion (21) and the bottom wall of the receiving groove (11) are spaced apart to form a second channel (32), and the first side (12) and the second side (22) are spaced apart to form a third channel (33); The first channel (31) and the third channel (33) extend along the height direction of the clamping plate assembly, and the second channel (32) extends along the width direction of the clamping plate assembly. The first channel (31), the second channel (32) and the third channel (33) are connected sequentially along the height direction of the clamping plate assembly to form the constraint channel (3).

3. The anti-reverse insertion structure for the electrode tabs according to claim 2, characterized in that, A first arc surface (121) is formed on the first side surface (12), and the first arc surface (121) is disposed on one side of the first opening (111) along the thickness direction of the clamping plate assembly; a second arc surface (221) is formed on the second side surface (22), and the second arc surface (221) is disposed on one side of the shaping protrusion (21) along the thickness direction of the clamping plate assembly; The first arc surface (121) and the second arc surface (221) are arranged opposite to each other along the width direction of the clamping plate assembly, and both are used to abut the tab (41); in the direction away from the assembly point of the receiving groove (11) and the shaping protrusion (21), the distance between the first arc surface (121) and the second arc surface (221) along the width direction of the clamping plate assembly gradually increases.

4. The anti-reverse insertion structure for the electrode tabs according to claim 2, characterized in that, The first clamping plate (1) has a recessed mounting groove on the side facing the second clamping plate (2). The opening of the mounting groove faces the second clamping plate (2). Notches are formed on both side walls of the mounting groove along the thickness direction of the clamping plate assembly. The bottom of the mounting groove is the first side (12), so that the first side (12) and the second side (22) are spaced apart.

5. The anti-reverse insertion structure for the electrode tabs according to claim 1, characterized in that, The first clamping plate (1) is provided with a first snap-fit ​​part (13), and the second clamping plate (2) is provided with a second snap-fit ​​part (23). The first snap-fit ​​part (13) and the second snap-fit ​​part (23) are arranged opposite to each other along the width direction of the clamping plate assembly and can snap-fit ​​each other. The first snap-fit ​​portion (13) and the receiving groove (11) are spaced apart along the length direction of the clamping plate assembly, and the second snap-fit ​​portion (23) and the shaping protrusion (21) are spaced apart along the length direction of the clamping plate assembly.

6. The anti-reverse insertion structure for the electrode tabs according to claim 5, characterized in that, The first snap-fit ​​portion (13) includes an extension plate (131) and a buckle (132). The extension plate (131) extends toward the second clamping plate (2) along the width direction of the clamping plate assembly. The buckle (132) is formed at one end of the extension plate (131) away from the first clamping plate (1). The buckle (132) protrudes from one side of the extension plate (131) along the thickness direction of the clamping plate assembly. The second snap-fit ​​part (23) includes a snap-fit ​​groove, wherein a guide opening (231) is formed on the side of the second clamping plate (2) facing the first clamping plate (1), and a snap-fit ​​interface (232) is formed on the side of the second clamping plate (2) along the thickness direction of the clamping plate assembly; The extension plate (131) is inserted into the snap-fit ​​groove through the guide port (231) along the width direction of the clamping plate assembly, so that the buckle (132) is snapped into the snap-fit ​​interface (232).

7. The anti-reverse insertion structure for the electrode tabs according to claim 5, characterized in that, The number of first latching parts (13) is multiple, and the multiple first latching parts (13) are spaced apart along the length direction of the clamping plate assembly; the number of second latching parts (23) is multiple, and the multiple second latching parts (23) are spaced apart along the length direction of the clamping plate assembly; Multiple first snap-fit ​​portions (13) and multiple second snap-fit ​​portions (23) are arranged in a one-to-one correspondence along the width direction of the clamping plate assembly. The receiving groove (11) is disposed between two adjacent first snap-fit ​​portions (13), and the shaping protrusion (21) is disposed between two adjacent second snap-fit ​​portions (23).

8. The anti-reverse insertion structure for the electrode tabs according to claim 1, characterized in that, The number of the receiving slots (11) is two, and the two receiving slots (11) are spaced apart along the length direction of the clamping plate assembly; The number of the shaping protrusions (21) is two, and the two shaping protrusions (21) are spaced apart along the length direction of the clamping plate assembly; the two shaping protrusions (21) and the two receiving grooves (11) are matched one-to-one to form two constraint channels (3), and the two constraint channels (3) respectively pass through the two tabs (41) of the battery cell (4).

9. The anti-reverse insertion structure for the electrode tabs according to claim 1, characterized in that, Both the first clamping plate (1) and the second clamping plate (2) are provided with guide ports (14) for the electrolyte to pass through.

10. A battery, characterized in that, Includes battery cell (4) and the tab anti-reverse insertion structure as described in any one of claims 1 to 9; The battery cell (4) has a tab (41) on its surface. The clamping plate assembly is located on the side of the battery cell (4) where the tab (41) is located and abuts against the battery cell (4). The tab (41) passes through the constraint channel (3) so that the end of the tab (41) away from the battery cell (4) is exposed on the side of the clamping plate assembly facing away from the battery cell (4).

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