Connecting piece and battery

Abstract

The utility model provides a connecting piece and a battery. The connecting piece comprises a pole connecting area and a connecting area, the tab connecting area is located on one side of the pole connecting area, and a transition structure is arranged at the edge of the tab connecting area and used for being in contact with a tab. By applying the technical scheme of the utility model, the technical problem that the tab is easy to damage in the welding process can be improved.

Description

Technical Field

[0001] This utility model relates to the field of connecting piece technology, specifically to a connecting piece and a battery. Background Technology

[0002] During battery production and assembly, connecting tabs are typically used to connect to the tabs and terminals, resulting in burrs on the sheared surfaces of the connecting tabs. The connecting tabs and tabs are then joined by ultrasonic welding; however, because the edges of the connecting tabs are right-angled, they are easily scratched during welding, leading to cracking and damage. This reduces the battery yield and increases production costs. Utility Model Content

[0003] The embodiments of this utility model provide a connecting piece and a battery, which can improve the technical problem of the tabs being easily damaged during the welding process.

[0004] In a first aspect, embodiments of the present invention provide a connecting piece, the connecting piece comprising: a pole post connecting area; a tab connecting area located on one side of the pole post connecting area, wherein a transition structure is provided at the edge of the tab connecting area, the transition structure being used to contact the tab.

[0005] In one embodiment, the transition structure includes rounded corners.

[0006] In one embodiment, the radius of the fillet is R, where 0.2mm ≤ R ≤ 1mm.

[0007] In one embodiment, the electrode connection area includes a first sub-connection area and a second sub-connection area arranged along the length direction of the connecting piece. The first sub-connection area is used for welding to the first electrode, and the second sub-connection area is used for welding to the second electrode.

[0008] In one embodiment, the connecting piece further includes a positioning groove, which is disposed adjacent to the tab connection area. The positioning groove is used to connect with the external component and position the connecting piece.

[0009] In one embodiment, the extension length of the positioning groove in the length direction of the connecting piece is L1, where 10mm≤L1≤20mm.

[0010] In one embodiment, the extension length of the positioning groove along the width direction of the connecting piece is L2, where 5mm ≤ L2 ≤ 8mm.

[0011] In one embodiment, the cross-sectional shape of the positioning groove along the length of the connecting piece includes at least one of a square, a trapezoid, or a triangle.

[0012] In one embodiment, the thickness of the connecting piece is H, where 0.5mm ≤ H ≤ 2mm.

[0013] Secondly, embodiments of this utility model provide a battery, which includes the aforementioned connecting piece.

[0014] By applying the technical solution of this utility model, a transition structure is provided at the edge of the electrode connection area. During the welding process between the connecting piece and the electrode, the contact area between the connecting piece and the electrode is increased, thereby changing the connection point between the connecting piece and the electrode from line cutting to surface contact. This blunts the cutting point at the connection point and does not damage the structure of the electrode, thus avoiding the risk of electrode breakage. This improves the yield rate of the battery and reduces the production cost of the battery. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of the connecting piece provided in an embodiment of this utility model;

[0017] Figure 2 This is a top view schematic diagram of the connecting piece provided in an embodiment of this utility model;

[0018] Figure 3 This is a front view schematic diagram of the connecting piece provided in an embodiment of this utility model.

[0019] The above figures include the following reference numerals:

[0020] Connecting piece 10, pole post connecting area 11, pole tab connecting area 12, first sub-connecting area 121, second sub-connecting area 122, transition structure 13, positioning groove 14, length direction X, width direction Y. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] In related technologies, connecting tabs are typically used to connect to electrodes and terminals, resulting in burrs on the sheared surfaces of the connecting tabs. The connecting tabs and electrodes are then joined by ultrasonic welding; however, because the edges of the connecting tabs are right-angled, they are easily scratched during welding, leading to cracking and damage. This reduces the battery yield and increases production costs.

[0023] like Figures 1 to 3 As shown, in view of this, an embodiment of the present invention provides a connecting piece 10, the connecting piece 10 including: a pole connecting area 11; a tab connecting area 12 located on one side of the pole connecting area 11, and a transition structure 13 provided at the edge of the tab connecting area 12, the transition structure 13 being used to contact the tab.

[0024] By applying the technical solution of this utility model, a transition structure 13 is provided at the edge of the tab connection area 12. During the welding process between the connecting piece 10 and the tab, the contact area between the connecting piece 10 and the tab is increased, thereby changing the connection between the connecting piece 10 and the tab from line cutting to surface contact. This blunts the cutting point at the connection and does not damage the structure of the tab, thus avoiding the risk of tab breakage. This improves the yield rate of the battery and reduces the production cost of the battery.

[0025] In one embodiment, the transition structure 13 includes rounded corners. Rounding corners, which involves cutting the right-angled edges of the connecting piece 10 into rounded surfaces, is a process structure that uses a rounded transition at the junction of two surfaces. Rounding corners significantly reduces the sharpness of the edges of the connecting piece 10, minimizing the risk of accidental cutting to the tabs or other components during use or assembly. Simultaneously, rounding corners enhance the structural strength of the connecting piece 10, making it more resistant to external forces and wear, thereby extending the service life of the connecting piece 10 and the entire device.

[0026] Furthermore, the rounded corner design makes it easier for the connecting piece 10 to mate with the tab or other components during assembly, reducing assembly difficulty and time, and improving production efficiency. Moreover, the rounded corners make the edges of the connecting piece 10 smoother and more rounded, thereby enhancing the overall aesthetics and texture of the product. Since the rounded corners reduce wear and damage to the edges of the connecting piece 10, maintenance costs incurred due to replacing damaged parts can be reduced.

[0027] In one embodiment, the radius of the fillet is R, 0.2mm ≤ R ≤ 1mm. Right angles can lead to stress concentration, increasing the risk of tab breakage, while a fillet with a radius of R (0.2mm ≤ R ≤ 1mm) can reduce this stress concentration and improve the tab's durability. Using sufficiently large transition fillets at corners (such as those within this scope) can prevent shearing phenomena, and the fillet design allows for better distribution of external forces, avoiding localized wear and thus extending the tab's lifespan. Furthermore, fillets can reduce damage caused by collisions and friction during assembly, protecting parts from damage.

[0028] In this application, R can be set to values ​​such as 0.2mm, 0.5mm, or 1mm.

[0029] In one embodiment, the tab connection area 12 includes a first sub-connection area 121 and a second sub-connection area 122 arranged along the length of the connecting piece 10. The first sub-connection area 121 is used for welding to the first tab, and the second sub-connection area 122 is used for welding to the second tab. Through clear functional partitioning, it can be ensured that each sub-connection area is accurately welded to its corresponding tab during the welding process, avoiding welding errors or positional misalignment, thereby improving welding accuracy and reliability. Functional partitioning allows the welding quality of each sub-connection area to be controlled and inspected individually, facilitating timely detection and problem-solving, and ensuring overall welding quality. Each sub-connection area is specifically designed for welding to its corresponding tab, ensuring welding area and welding quality, thereby improving the strength and stability of the connection. Functional partitioning can reduce defects that may occur during the welding process, such as cracks and porosity, further improving the reliability of the connection.

[0030] Furthermore, good welding connections can reduce the battery's internal resistance, thereby improving its discharge performance and efficiency. Stable connections also reduce potential malfunctions and safety hazards during battery use, enhancing battery safety. When maintenance or tab replacement is required, the corresponding sub-connection area can be easily located for operation, simplifying the maintenance process. Functional zoning reduces maintenance costs and time costs caused by welding errors or unstable connections. This design can be flexibly adjusted according to different battery design requirements, such as changing the length and width of the sub-connection area to adapt to different battery sizes and performance requirements. With the continuous development of battery technology, this design can be easily expanded and upgraded to meet the needs of future higher-performance batteries.

[0031] In one embodiment, the connecting piece 10 further includes a positioning groove 14, which is disposed adjacent to the tab connection area 12. The positioning groove 14 is used to connect with the external component and position the connecting piece 10. The design of the positioning groove 14 ensures the accuracy and consistency of the connection when the connecting piece 10 is connected with the external component. This helps to reduce errors or malfunctions caused by inaccurate connections. Guided by the positioning groove 14, the connecting piece 10 can be quickly and accurately connected with the external component, simplifying the installation process and improving work efficiency.

[0032] Meanwhile, the presence of the positioning groove 14 ensures a tight connection between the connecting piece 10 and the external component, preventing loosening or detachment during use. The positioning groove 14 increases the connection area, thereby improving the strength and stability of the connection and ensuring a reliable connection between the connecting piece 10 and the external component. When maintenance or replacement of the connecting piece 10 is required, the positioning groove 14 allows workers to quickly locate and disassemble it, reducing the difficulty and complexity of maintenance work. Because the positioning groove 14 makes disassembly and replacement of the connecting piece 10 easier, it reduces losses and costs caused by improper maintenance.

[0033] In one embodiment, the positioning groove 14 extends for a length L1 along the length of the connecting piece 10, where 10mm ≤ L1 ≤ 20mm. The length L1 of the positioning groove 14 falls within this range, ensuring precise positioning between the connecting piece 10 and the external component. This helps reduce errors or malfunctions caused by inaccurate positioning, improving the overall reliability and stability of the connection. The 10mm to 20mm extension length range allows the positioning groove 14 to adapt to external components of different sizes and shapes. This design offers high flexibility and can meet the needs of various application scenarios. The moderate length of the positioning groove 14 simplifies the processing of the connecting piece 10, helping to reduce production costs and improve production efficiency. The design of the positioning groove 14 increases the connection area, thereby improving the connection strength between the connecting piece 10 and the external component. This helps ensure the stability and durability of the connection. When maintenance or replacement of the connecting piece 10 is required, the design of the positioning groove 14 facilitates disassembly and reinstallation by personnel, reducing maintenance difficulty and costs.

[0034] When designing the length L1 of the positioning groove 14, the size and shape of the external component must be fully considered. Ensure that the positioning groove 14 can accommodate the external component and achieve precise positioning. Select an appropriate length for the positioning groove 14 based on the connection requirements between the connecting piece 10 and the external component. For example, for connections that need to withstand large loads, a longer positioning groove 14 can be selected to increase the connection area and strength.

[0035] In this application, L1 can be set to a value such as 10mm, 15mm or 20mm.

[0036] In one embodiment, the positioning groove 14 extends for a length L2 along the width direction of the connecting piece 10, where 5mm ≤ L2 ≤ 8mm. The moderate extension length L2 of the positioning groove 14 in the width direction ensures precise positioning of the connecting piece 10 and the external component. This helps reduce errors or malfunctions caused by inaccurate positioning, improving the overall stability and reliability of the connection. An appropriate L2 length increases the contact area between the connecting piece 10 and the external component, thereby improving connection stability. This helps prevent loosening or detachment during use, ensuring the durability of the connection. The range of L2 lengths of the positioning groove 14 allows the connecting piece 10 to adapt to external components of different widths. This design offers high flexibility, meeting the needs of various application scenarios and improving the versatility and applicability of the connecting piece 10. In practical applications, the L2 length of the positioning groove 14 can be appropriately adjusted and optimized according to the size and shape of the external component and connection requirements. This helps ensure optimal fit and connection between the connecting piece 10 and the external component.

[0037] The moderate L2 length of the positioning groove 14 simplifies the manufacturing process of the connecting piece 10. This helps reduce production costs, improve production efficiency, and ensure the quality of the connecting piece 10. An appropriate L2 length reduces material consumption in the width direction of the connecting piece 10, thereby lowering material costs. This helps maximize cost-effectiveness and enhance product competitiveness. When maintenance or replacement of the connecting piece 10 is required, the moderate L2 length of the positioning groove 14 facilitates disassembly and reinstallation by workers. This helps reduce maintenance difficulty and costs, and improve maintenance efficiency. An appropriate L2 length ensures that the connecting piece 10 is not damaged or deformed during disassembly and reinstallation, thus improving the maintainability and service life of the connecting piece 10.

[0038] In this application, L2 can be set to a value such as 5mm, 6mm or 8mm.

[0039] In one embodiment, the cross-sectional shape of the positioning groove 14 along the length of the connecting piece 10 includes at least one of square, trapezoidal, or triangular shapes. A square-section positioning groove 14 has a regular geometric shape, facilitating processing and manufacturing, while providing a stable positioning effect. The four corners of the square cross-section can provide additional strength support, helping to resist external forces and stresses, ensuring the stability and reliability of the connecting piece 10. A trapezoidal-section positioning groove 14 has a beveled design, facilitating insertion and positioning with external components, while providing better guidance and fixing effects. The beveled sides of the trapezoidal cross-section can also increase the contact area, improving the connection strength and stability between the connecting piece 10 and the external component. A triangular-section positioning groove 14 has the stability of a triangular structure, capable of withstanding larger loads and stresses, ensuring that the connecting piece 10 will not deform or be damaged during use. The triangular-section positioning groove 14 can also provide better heat dissipation, helping to extend the service life of the connecting piece 10. Based on the shape, size, and connection requirements of the external component, the most suitable cross-sectional shape can be selected to ensure optimal fit and connection between the connecting piece 10 and the external component. Positioning grooves 14 with cross-sectional shapes such as square, trapezoidal and triangular are relatively simple and easy to cut, bend and process using various processing tools and equipment.

[0040] In one embodiment, the thickness of the connecting piece 10 is H, where 0.5mm ≤ H ≤ 2mm. A thickness H within this range ensures that the connecting piece 10 has sufficient structural strength to withstand certain loads and stresses. This helps prevent deformation or breakage of the connecting piece 10 during use, improving the stability and reliability of the overall structure. An appropriate thickness H also increases the durability of the connecting piece 10, enabling it to maintain stable performance over a long period. This helps extend the service life of the connecting piece 10 and reduce the frequency of replacement and maintenance.

[0041] The moderate thickness of the connecting piece 10 simplifies its processing, helping to reduce production costs and improve efficiency. The appropriate thickness also facilitates cutting, bending, and welding using various tools and equipment. While meeting structural strength requirements, a suitable thickness H improves material utilization. This helps reduce material waste, lower production costs, and contributes to environmental protection and sustainable development. Within this range, the thickness H of the connecting piece 10 can adapt to different application scenarios and needs. For example, in applications requiring heavier loads, a thicker connecting piece 10 can be selected to increase structural strength.

[0042] In applications with strict requirements on weight and volume, a thinner connecting piece 10 can be selected to reduce overall weight. The thickness H of the connecting piece 10 can be customized and optimized according to specific application needs and design requirements. This helps ensure optimal fit and connection between the connecting piece 10 and the overall structure. An appropriate thickness H ensures the connection quality between the connecting piece 10 and external components. For example, in welding, a thicker connecting piece 10 provides better thermal conductivity and weld strength; while in bolted connections, an appropriate thickness improves the tightness and stability of the connection. A moderate thickness of the connecting piece 10 can reduce the failure rate due to poor connection or material fatigue. This contributes to improving the reliability and safety of the overall structure.

[0043] In this application, H can be set to a value such as 0.5mm, 1mm or 2mm.

[0044] Secondly, an embodiment of the present invention provides a battery, which includes the aforementioned connecting piece 10.

[0045] By applying the technical solution of this utility model, a transition structure 13 is provided at the edge of the tab connection area 12. During the welding process between the connecting piece 10 and the tab, the contact area between the connecting piece 10 and the tab is increased, thereby changing the connection between the connecting piece 10 and the tab from line cutting to surface contact. This blunts the cutting point at the connection and does not damage the structure of the tab, thus avoiding the risk of tab breakage. This improves the yield rate of the battery and reduces the production cost of the battery.

[0046] This application also proposes a battery module, which includes the battery described above. The specific structure of the battery is as described in the above embodiments. Since this battery module adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0047] This application also proposes a battery pack, which includes the aforementioned battery module. The specific structure of the battery module is described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated upon here.

[0048] Furthermore, this application also proposes an electrical device that includes the aforementioned battery pack. The specific structure of the battery pack is described in the above embodiments. Since this electrical device employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0051] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0052] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0053] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connecting piece, characterized in that, The connecting piece includes: pole connection area; The tab connection area is located on one side of the pole connection area, and a transition structure is provided at the edge of the tab connection area for contacting the tab.

2. The connecting piece according to claim 1, characterized in that, The transition structure includes rounded corners.

3. The connecting piece according to claim 2, characterized in that, The radius of the fillet is R, where 0.2mm ≤ R ≤ 1mm.

4. The connecting piece according to claim 3, characterized in that, The electrode connection area includes a first sub-connection area and a second sub-connection area arranged along the length direction of the connecting piece. The first sub-connection area is used for welding with the first electrode, and the second sub-connection area is used for welding with the second electrode.

5. The connecting piece according to any one of claims 1-4, characterized in that, The connecting piece also includes a positioning groove, which is disposed adjacent to the tab connection area. The positioning groove is used to connect with the external component and position the connecting piece.

6. The connecting piece according to claim 5, characterized in that, The extension length of the positioning groove in the length direction of the connecting piece is L1, where 10mm≤L1≤20mm.

7. The connecting piece according to claim 5, characterized in that, The length of the positioning groove along the width direction of the connecting piece is L2, where 5mm ≤ L2 ≤ 8mm.

8. The connecting piece according to claim 5, characterized in that, The cross-sectional shape of the positioning groove along the length of the connecting piece includes at least one of square, trapezoidal, or triangular shapes.

9. The connecting piece according to any one of claims 1-8, characterized in that, The thickness of the connecting piece is H, where 0.5mm ≤ H ≤ 2mm.

10. A battery, characterized in that, The battery includes a connecting piece as described in any one of claims 1-9.

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