Battery monomer and electric equipment

Abstract

The utility model relates to a single battery and electric equipment, and relates to the technical field of batteries, the single battery comprises a shell, a battery cell, a top cover and an electric connecting piece, the shell is provided with a containing cavity, and the containing cavity is provided with an opening; the battery cell is arranged in the accommodating cavity and is provided with a tab group; the top cover is used for sealing the opening and is provided with a pole; the electric connecting piece is arranged between the top cover and the battery cell, the electric connecting piece comprises a first connecting part and a second connecting part, the first connecting part is connected with the pole, the second connecting part is connected with the first connecting part, the second connecting part is provided with a clamping groove extending in the first direction, and part of the tab group penetrates through the clamping groove and extends to one side, close to the battery cell, of the second connecting part; and one part of the tab group is connected with one side, close to the battery cell, of the second connecting part. According to the single battery and the electric equipment, the problem that the tab group is easily inversely inserted into the battery cell in the cell closing and bending process can be solved, and the safety and reliability of the single battery are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery cell and an electrical device. Background Technology

[0002] During the cell assembly process, the cells on both sides of the top cover flip over, and the tabs on the top of the cells bend accordingly. Since the tabs consist of multiple layers of stacked tabs, the curvature of the inner and outer layers is different during the bending process. This can easily cause some tabs in the tab group to separate or break at the bending point. The separated or broken tabs may then be inserted upside down into the cell, posing a safety hazard. Utility Model Content

[0003] To address the aforementioned technical problems, embodiments of this application provide a battery cell and an electrical device that can improve the problem of the tab assembly being easily inserted backwards into the battery cell during the core bending process, thereby enhancing the safety and reliability of the battery cell.

[0004] In a first aspect, a battery cell is provided, comprising:

[0005] The outer casing has a receiving cavity, and the receiving cavity has an opening;

[0006] A battery cell is disposed within the receiving cavity, and the battery cell is provided with a tab assembly;

[0007] A top cover for closing the opening, the top cover being provided with a pole post;

[0008] An electrical connector is disposed between the top cover and the battery cell. The electrical connector includes a first connecting portion and a second connecting portion. The first connecting portion is connected to the electrode post, and the second connecting portion is connected to the first connecting portion. The second connecting portion has a slot extending in a first direction. A portion of the electrode assembly passes through the slot and extends to the side of the second connecting portion near the battery cell. A portion of the electrode assembly is connected to the side of the second connecting portion near the battery cell.

[0009] According to a first aspect of this application, the tab assembly includes a bent portion, and the inner wall of the slot abuts against the bent portion.

[0010] According to a first aspect of this application, the card slot extends through the end of the second connecting portion away from the first connecting portion along the first direction; or...

[0011] The card slot has closed structures at both ends along the first direction.

[0012] According to a first aspect of this application, a portion of the tab assembly extends from the battery cell to the side of the second connection portion away from the battery cell, bends through the slot, and then bends again to extend to the side of the second connection portion closer to the battery cell; or,

[0013] A portion of the tab assembly bends from the battery cell through the slot and extends to the side of the second connection near the battery cell.

[0014] According to a first aspect of this application, the second connecting portion includes:

[0015] The main body is connected to the electrode assembly;

[0016] An edge portion is connected to the main body portion, and at least a portion of the edge portion forms the slot with at least a portion of the main body portion; at least a portion of the surface of the main body portion is coplanar or parallel to at least a portion of the surface of the edge portion.

[0017] According to a first aspect of this application, the second connecting portion includes:

[0018] The main body is connected to the electrode assembly;

[0019] An edge portion (connected to the main body portion) forms the slot between at least a portion of the edge portion and at least a portion of the main body portion; the edge portion is disposed perpendicular to the main body portion.

[0020] According to a first aspect of this application, the edge portion has an arcuate structure on the side near the slot, and at least a portion of the arcuate structure is used to contact the tab assembly.

[0021] According to a first aspect of this application, at least a portion of the edge portion is a cylindrical structure for contacting the tab assembly.

[0022] According to a first aspect of this application, the width of the slot along the second direction is A, and the thickness of the tab assembly is B, wherein A and B satisfy: 1.1*B≤A≤2.5*B; wherein the second direction is perpendicular to the first direction.

[0023] Secondly, an electrical appliance is also provided, including:

[0024] The battery cell as described in the previous embodiment.

[0025] The battery cell and electrical device provided in this application embodiment utilize a slot on the electrical connector, allowing a portion of the tab assembly to pass through the slot and extend to the side of the second connection near the battery cell. This ensures a stable connection between the tab assembly and the electrical connector while the slot limits the tab assembly's position. Therefore, during the cell assembly process, the tab assembly is confined within the slot by the slot, effectively gathering multiple tabs within the assembly. This results in better overall bending consistency and reduces the likelihood of separation or breakage at the bent parts of the tab assembly. This effectively addresses the problem of some tabs easily being inserted backwards into the battery cell during the cell assembly process, effectively eliminating safety hazards during the assembly process. Attached Figure Description

[0026] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0027] Figure 1 This is a schematic diagram of the structure of a battery cell and an electrical connector provided for an exemplary embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the structure of an electrical connector provided for an exemplary embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the structure of the tab assembly and electrical connector provided for an exemplary embodiment of this application.

[0030] Figure 4 A schematic diagram of the structure of an electrical connector provided for another exemplary embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the structure of the tab assembly and electrical connector provided for another exemplary embodiment of this application.

[0032] Reference numerals: 100-Electrical connector; 110-First connecting part; 120-Second connecting part; 121-Main body part; 122-Edge part; 123-Slot; 200-Electrical tab assembly; 210-Bending part; 300-Battery cell. Detailed Implementation

[0033] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0034] Figure 1 This is a schematic diagram of the structure of a battery cell and an electrical connector provided for an exemplary embodiment of this application. Figure 1 As shown, the battery cell provided in this application embodiment may include a casing and a cell 300. The casing has a receiving cavity, and the cell 300 is disposed in the receiving cavity. The casing protects the cell 300.

[0035] The battery cell may also include a top cover, which is located on top of the cell 300. The aforementioned receiving cavity has an opening, through which the cell 300 is assembled into the housing. The top cover can close the opening and protect the top of the cell 300.

[0036] like Figure 1 As shown, the battery cell may also include an electrical connector 100. The top cover is usually provided with a terminal post, and the battery cell 300 is usually provided with a tab group 200. The electrical connector 100 is usually located between the top cover and the battery cell 300. The electrical connector 100 can be used to connect the terminal post and the tab group 200 to realize the transmission of electrical signals between the terminal post and the tab group 200.

[0037] Specifically, Figure 2 This is a schematic diagram of the structure of an electrical connector provided for an exemplary embodiment of this application. Figure 1 and Figure 2 As shown, the electrical connector 100 may include a first connecting part 110 and a second connecting part 120. The first connecting part 110 is connected to the pole post, the second connecting part 120 is connected to the first connecting part 110, and the second connecting part 120 is connected to the tab assembly 200. In this way, the electrical signal between the pole post and the tab assembly 200 can be transmitted to each other through the first connecting part 110 and the second connecting part 120.

[0038] Figure 3 This is a schematic diagram of the structure of the tab assembly and electrical connector provided for an exemplary embodiment of this application. Figures 1 to 3 As shown, the second connecting portion 120 is provided along the first direction (see reference for details). Figure 2 The slot 123 extends in the X-axis direction, and a portion of the tab assembly 200 passes through the slot 123 and extends to the side of the second connection portion 120 near the cell 300. A portion of the tab assembly 200 is connected to the side of the second connection portion 120 near the cell 300.

[0039] It should be noted that during the cell assembly process, the cells on both sides of the top cover are flipped (the state after flipping can be referenced). Figure 1As shown in the diagram, a portion of the tab assembly 200 may bend. In related technologies, during the bending process of the tab assembly 200, due to a lack of restraint and constraint, some tabs in the tab assembly 200 may separate or break at the bending point. The separated or broken tabs can easily be inserted backwards into the battery cell 300, posing a safety hazard.

[0040] Therefore, the battery cell provided in this application embodiment has a slot 123 on the electrical connector 100, allowing a portion of the tab assembly 200 to pass through the slot 123 and extend to the side of the second connection portion 120 near the cell 300. This ensures a stable connection between the tab assembly 200 and the electrical connector 100 while the slot 123 limits the tab assembly 200. Thus, during the cell assembly process, the tab assembly 200 is limited by the slot 123, and the tabs in the tab assembly 200 are entirely confined within the slot 123. The slot 123 effectively gathers the multiple tabs in the tab assembly 200, resulting in better overall bending consistency of the tab assembly 200. The bent parts of the tab assembly 200 are less prone to separation or breakage, effectively improving the problem of some tabs easily being inserted backwards into the cell 300 during the cell assembly process and effectively eliminating safety hazards during the cell assembly process.

[0041] In one embodiment, such as Figure 2 As shown, there are two card slots 123, which are distributed in parallel. The two card slots 123 can be used to hold the tabs 200 on different battery cells 300 respectively.

[0042] like Figure 2 As shown, the card slot 123 is along the second direction (perpendicular to the first direction, see reference for details). Figure 2 The width of the slot 123 (in the Y-axis direction) is A, and the thickness of the tab assembly 200 is B. If the width A of the slot 123 exceeds the thickness B of the tab assembly 200 by too much, the gap between the inner wall of the slot 123 and the tab assembly 200 will be large after the tab assembly 200 is inserted into the slot 123, and the slot 123 will not easily play the aforementioned role of limiting and closing the tab assembly 200. If the width A of the slot 123 exceeds the thickness B of the tab assembly 200 by too little, the tab assembly 200 will not easily be inserted into the slot 123, affecting the assembly efficiency between the tab assembly 200 and the electrical connector 100.

[0043] Therefore, in this embodiment, the width A of the card slot 123 and the thickness B of the tab assembly 200 are limited to the following range: 1.1*B≤A≤2.5*B. This effectively addresses the problem that the width A of the card slot 123 exceeds the thickness B of the tab assembly 200 by too much or too little.

[0044] In one embodiment, A can be selected as 1.1*B, 1.5*B, 2.1*B, 2.5*B, etc.

[0045] like Figure 3 As shown, the tab assembly 200 may include a bent portion 210, and the inner wall of the slot 123 abuts against the bent portion 210. Thus, firstly, under the abutting action of the inner wall of the slot 123, the bent portion 210 of the tab assembly 200 is less prone to tearing or inversion; secondly, during the welding process of the tab assembly 200, the inner wall of the slot 123 can provide a limiting function for the tab assembly 200 through the bent portion 210, improving the stability of the tab assembly 200 during the welding process.

[0046] In one embodiment, the number of bends 210 can be one, two, three, etc., that is, the number of times the tab assembly 200 is bent can be one, two, three, etc.

[0047] like Figure 2 As shown, the slot 123 extends through the end of the second connecting portion 120 away from the first connecting portion 110 along the first direction. That is, a notch is formed at the end of the second connecting portion 120 away from the first connecting portion 110, and the electrode assembly 200 can be inserted into the slot 123 more quickly through the notch, which can effectively improve the assembly efficiency between the electrode assembly 200 and the electrical connector 100.

[0048] In one embodiment, both ends of the slot 123 along the first direction are closed structures. In this way, after the tab assembly 200 passes through the slot 123, the tab assembly 200 will not detach from the two ends of the slot 123, which helps to improve the stability of the tab assembly 200 within the slot 123.

[0049] In one embodiment, multiple tabs in the tab assembly 200 can be pre-welded, after which the entire tab assembly 200 can be snapped into the slot 123. In practical applications, the clamp holding the electrical connector 100 is usually moved so that the electrical connector 100 is brought closer to the tab assembly 200, and the tab assembly 200 is snapped into the slot 123.

[0050] like Figure 2 As shown, the second connecting portion 120 may include a main body portion 121 and an edge portion 122. The main body portion 121 is connected to the electrode assembly 200, and the edge portion 122 is connected to the main body portion 121. At least a portion of the edge portion 122 forms a groove 123 with at least a portion of the main body portion 121, and at least a portion of the surface of the main body portion 121 is coplanar with at least a portion of the surface of the edge portion 122. This reduces the distance between the electrical connector 100 and the battery cell height (see reference for details). Figure 1 The space occupied in the Z-axis direction.

[0051] In one embodiment, at least a portion of the surface of the main body 121 and at least a portion of the surface of the edge 122 may also be parallel, and the main body 121 and the edge 122 are parallel in the height direction of the battery cell (see specific reference). Figure 1 The tab assembly 200 is offset along the Z-axis direction. The area between the main body 121 and the edge 122 can be used to accommodate the bent portion 210 of the tab assembly 200. This prevents the bent portion 210 of the tab assembly 200 from protruding relative to the main body 121, prevents other components from bumping into the bent portion 210, and avoids the problem of the bent portion 210 breaking or separating.

[0052] Figure 4 A schematic diagram of the structure of an electrical connector provided for another exemplary embodiment of this application. Figure 5 A schematic diagram of the structure of the tab assembly and electrical connector provided for another exemplary embodiment of this application. (See diagram below.) Figure 4 and Figure 5 As shown, in one embodiment, the edge portion 122 and the main body portion 121 can be arranged perpendicularly. In this way, on the one hand, after the tab assembly 200 passes through the slot 123, it only needs to be bent once to extend to the side of the second connecting portion 120 near the battery cell 300. The bending process is simple and quick, which can improve the assembly efficiency between the tab assembly 200 and the electrical connecting piece. On the other hand, after the edge portion 122 is perpendicular to the main body portion 121, the contact area between the edge portion 122 and the tab assembly 200 can be increased, which can improve the contact stability of the edge portion 122 with the tab assembly 200.

[0053] like Figure 3 As shown, in one embodiment, a portion of the tab assembly 200 extends from the battery cell 300 to the side of the second connection portion 120 away from the battery cell 300, bends through the slot 123, and bends again to extend to the side of the second connection portion 120 near the battery cell 300. That is, the tab assembly 200 undergoes two bends during its extension from the battery cell 300 to the side of the second connection portion 120 near the battery cell 300. This double bend improves the assembly stability between the tab assembly 200 and the slot 123, effectively preventing the tab assembly 200 from detaching from the slot 123 and enhancing the stability of the tab assembly 200 during welding to the second connection portion 120.

[0054] like Figure 5 As shown, in one embodiment, a portion of the tab assembly 200 bends from the battery cell 300 through the slot 123 and extends to the side of the second connecting portion 120 near the battery cell 300. That is, the tab assembly 200 only needs to bend once during its extension from the battery cell 300 to the side of the second connecting portion 120 near the battery cell 300, resulting in fewer bends and a faster bending process. This effectively improves the assembly efficiency between the tab assembly 200 and the electrical connector.

[0055] In one embodiment, the number of bends that the tab assembly 200 undergoes as it extends from the battery cell 300 to the side of the second connection portion 120 near the battery cell 300 can be three, four, five, or more.

[0056] In one embodiment, the edge portion 122 has an arcuate structure on the side near the slot 123, and at least part of the arcuate structure is used to contact the tab assembly 200. The edge portion 122 contacts the tab assembly 200 through the arcuate structure, which can reduce the pressure damage of the edge portion 122 to the tab assembly 200 and protect the tab assembly 200.

[0057] In one embodiment, at least a portion of the edge portion 122 is a cylindrical structure. The outer wall of the cylindrical structure can serve as the aforementioned arc-shaped structure. The cylindrical structure contacts the contact tab assembly 200, which can reduce the pressure damage of the edge portion 122 on the tab assembly 200 and protect the tab assembly 200.

[0058] In one embodiment, a portion of the edge portion 122 may be configured as a cylindrical structure; or the entire edge portion 122 may be a cylindrical structure.

[0059] This application also provides an electrical device that includes a battery cell as described in the previous embodiment and has all the functions of the battery cell.

[0060] The beneficial effects of the electrical equipment provided in the embodiments of this application can be referenced with the beneficial effects of the aforementioned battery cells.

[0061] In one embodiment, the aforementioned electrical equipment includes the aforementioned battery cell, and is capable of being powered by the aforementioned battery cell. The aforementioned electrical equipment may be a vehicle, mobile phone, portable device, laptop, ship, spacecraft, electric toy, power tool, energy storage device, amusement equipment, elevator, and lifting equipment, etc. Vehicles may be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles; new energy vehicles may 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 stationary or mobile electric toys, such as game consoles, electric car 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, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices may be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment may be a carousel, a drop tower, etc.

[0062] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0063] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0064] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0065] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0066] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A battery cell, characterized by, include: The outer casing has a receiving cavity, and the receiving cavity has an opening; A battery cell (300) is disposed within the receiving cavity, and the battery cell (300) is provided with a tab assembly (200); A top cover for closing the opening, the top cover being provided with a pole post; An electrical connector (100) is disposed between the top cover and the battery cell (300). The electrical connector (100) includes a first connecting portion (110) and a second connecting portion (120). The first connecting portion (110) is connected to the pole post, and the second connecting portion (120) is connected to the first connecting portion (110). The second connecting portion (120) is provided with a slot (123) extending in a first direction. A portion of the tab assembly (200) passes through the slot (123) and extends to the side of the second connecting portion (120) near the battery cell (300). A portion of the tab assembly (200) is connected to the side of the second connecting portion (120) near the battery cell (300).

2. The battery cell according to claim 1, characterized in that, The tab assembly (200) includes a bent portion (210), and the inner wall of the slot (123) abuts against the bent portion (210).

3. The battery cell according to claim 1, characterized in that, The slot (123) extends along the first direction through one end of the second connecting portion (120) away from the first connecting portion (110); or, The card slot (123) has closed structures at both ends along the first direction.

4. The battery cell of claim 1, wherein, A portion of the tab assembly (200) extends from the battery cell (300) to the side of the second connection portion (120) away from the battery cell (300), bends through the slot (123), and bends again to the side of the second connection portion (120) near the battery cell (300); or, A portion of the tab assembly (200) bends from the battery cell (300), passes through the slot (123), and extends to the side of the second connection portion (120) near the battery cell (300).

5. The battery cell of claim 1, wherein, The second connecting part (120) includes: The main body (121) is connected to the electrode assembly (200); An edge portion (122) is connected to the main body portion (121), and at least a portion of the edge portion (122) and at least a portion of the main body portion (121) form the slot (123); at least a portion of the surface of the main body portion (121) is coplanar or parallel to at least a portion of the surface of the edge portion (122).

6. The battery cell according to claim 1, characterized in that, The second connecting part (120) includes: The main body (121) is connected to the electrode assembly (200); An edge portion (122) is connected to the main body portion (121), and at least a portion of the edge portion (122) forms the slot (123) between at least a portion of the main body portion (121); the edge portion (122) is perpendicular to the main body portion (121).

7. The battery cell according to claim 5 or 6, characterized in that The edge portion (122) has an arc-shaped structure on the side near the slot (123), and at least a portion of the arc-shaped structure is used to contact the tab assembly (200).

8. The battery cell of claim 7, wherein, At least a portion of the edge portion (122) is a cylindrical structure for contacting the tab assembly (200).

9. The battery cell of any one of claims 1 to 6, wherein, The width of the slot (123) along the second direction is A, and the thickness of the tab assembly (200) is B. A and B satisfy: 1.1*B≤A≤2.5*B; wherein the second direction is perpendicular to the first direction.

10. An electric device, characterized by include: The battery cell as described in any one of claims 1 to 9.

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