Adapter and battery

Abstract

Provided in the present application are an adapter and a battery. The adapter comprises a connecting plate and a pin plate, wherein the connecting plate is connected to a terminal post of the battery; the pin plate is welded to a tab of the battery and is connected to one side of the connecting plate by means of a bent plate; the end of the bent plate connected to the pin plate can be bent relative to the other end of the connecting plate; the battery achieves electrical connection between the terminal post and the tab by means of the adapter; and the bent plate is provided with at least one indentation.

Description

Adapters and batteries

[0001] This application claims priority to Chinese Patent Application No. 202422673642.X, filed with the Chinese Patent Office on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of batteries, specifically to an adapter and a battery. Background Technology

[0003] In common battery cell structures, the tabs are usually soldered to an adapter connected to the terminal post. This adapter enables electrical connection between the tabs and the terminal post, allowing the current in the battery cell to be conducted from the inside to the outside. Invention Overview

[0004] In related technologies, after the tabs are soldered, the tabs and the adapter need to be flattened. However, the charging rate requirements of the battery cells are increasing with the development of the industry, so the thickness of the adapter also needs to be increased accordingly to have a suitable current carrying capacity. But as the thickness of the adapter increases, it becomes more and more difficult to flatten the part where the tabs are soldered to the adapter, which can easily cause damage to the pins in the process.

[0005] This application provides an adapter. The adapter includes a connecting plate and a pin plate; the connecting plate is used to connect to the electrode post; the pin plate is used to connect to the electrode tab and is connected to one side of the connecting plate via a bending plate; wherein the bending plate has at least one notch.

[0006] This application also provides a battery, the battery including the adapter as described above; the adapter includes a connecting plate and a lead plate; the connecting plate is used to connect to the terminal post; the lead plate is used to connect to the terminal tab and is connected to one side of the connecting plate by a bending plate; wherein the bending plate has at least one groove. Beneficial effects

[0007] The adapter and battery provided in this application have grooves on the bending plate. Since the grooves can generate stress concentration inside the bending plate structure, the stress at the groove location will be more concentrated than the stress at other locations on the bending plate during the bending process. This makes the material at the groove more prone to deformation. This stress concentration phenomenon makes the groove a weak point of the bending plate, thereby reducing the difficulty of bending the bending plate. Attached Figure Description

[0008] Figure 1 is a first-view structural schematic diagram of the adapter provided in an embodiment of this application.

[0009] Figure 2 is a structural schematic diagram of the adapter provided in the application embodiment from a second perspective.

[0010] Figure 3 is a structural schematic diagram of the adapter provided in the application embodiment from a third-view perspective.

[0011] Figure 4 is an enlarged view of part A in Figure 3.

[0012] Figure 5 is an enlarged view of part B in Figure 3.

[0013] Figure 6 is an enlarged view of the first notch in Figure 4.

[0014] Figure 7 is an enlarged view of part A in Figure 3.

[0015] Explanation of reference numerals in the attached figures:

[0016] 100. Adapter; 110. Connecting plate; 120. Pin plate; 130. Bending plate; 140. Score; 141. First score; 142. Second score; 150. Notch; 160. Holding part.

[0017] Implementation methods of this application

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0019] With the rapid development of industries such as electric vehicles, the demand for battery charging rates is also increasing. In order to ensure that the battery can work normally at a high charging rate, the thickness of the adapter that plays the role of overcurrent in the battery is also designed to be thicker. However, thicker adapters are often less prone to deformation.

[0020] To address the difficulty in folding the adapter and tab flat due to the thickness of the adapter in related technologies, embodiments of this application provide an adapter. Please refer to Figures 1 and 2. Figure 1 is a first-view structural schematic diagram of the adapter 100 provided in this application embodiment, and Figure 2 is a second-view structural schematic diagram of the adapter 100 provided in this application embodiment. The battery achieves electrical connection between the terminal and the tab through the adapter 100, thereby enabling the battery current to be conducted from the inside to the outside of the battery.

[0021] Please refer to Figures 3 and 4. Figure 3 is a structural schematic diagram of the adapter 100 provided in the application embodiment from a third perspective. Figure 4 is an enlarged view of part A in Figure 3. The adapter 100 includes a connecting plate 110 and a lead plate 120. The connecting plate 110 is used to electrically connect to the battery terminal. The lead plate 120 is used to weld the battery tabs and is connected to one side of the connecting plate 110 through a bending plate 130. The bending plate 130 is provided with at least one notch 140. One end of the bending plate 130 connected to the lead plate 120 can be bent along the notch 140 relative to the other end of the connecting plate 110 to flatten the tabs welded to the bending plate 130.

[0022] It should be noted that the length direction of the notch 140 on the bending plate 130 should be perpendicular to the bending direction of the bending plate 130. This structural design allows the bending plate 130 to be effectively guided to bend along the notch 140 when an external force is applied to it to cause it to bend.

[0023] In this embodiment, the bending plate 130 is provided with a notch 140. The presence of the notch 140 guides the stress distribution of the bending plate 130 during the bending process, effectively reducing the bending difficulty of the bending plate 130, lowering the requirements for tooling equipment, and improving processing efficiency. For example, when the bending plate 130 is bent, significant stress concentration occurs at the location of the notch 140. This structural design locally weakens the bending resistance of the bending plate 130, making the material at the notch 140 more prone to deformation, thereby making the bending operation easier to complete.

[0024] In some embodiments, referring to FIG4, the notch 140 includes a first notch 141 and a second notch 142. The first notch 141 is located near the connecting plate 110, while the second notch 142 is located near the pin plate 120. The first notch 141 and the second notch 142 are spaced apart, so that the bending plate 130 can be bent gradually along these two notches until the tabs soldered to the bending plate 130 are bent to the required angle.

[0025] In actual operation, during the bending process of the bending plate 130, stress concentration may occur at the bending point, leading to material extrusion or structural fracture. To solve this problem, by setting a first notch 141 and a second notch 142 on the bending plate 130, the stress distribution of the bending plate 130 during the bending process can be effectively guided. For example, when force is applied to the bending plate 130, the first notch 141 and the second notch 142 will form two bending trajectories on the bending plate 130 respectively. This means that the applied bending force will not be too concentrated at one point, but will be distributed to multiple locations through these two notches, causing the bending plate 130 to gradually bend in the area between these two notches. This structural design allows the bending plate 130 to deform in a more uniform manner, thereby reducing local stress concentration during the bending process.

[0026] Compared with traditional designs, this structural design reduces the risk of material extrusion by reducing stress concentration at a specific point, thereby reducing the probability of breakage or failure and significantly improving the overall stability of the bent plate 130 during the bending process.

[0027] In some embodiments, referring to FIG6, which is an enlarged view of the first notch 141 in FIG4, the top width W1 of the first notch 141 is designed to be greater than the bottom width of the first notch 141. For example, designing the top width W1 of the first notch 141 to be wider allows the stress generated during bending to concentrate at the bottom of the first notch 141. On the one hand, this structural design ensures that the bending plate 130 is easier to bend at the location of the first notch 141. On the other hand, the wider opening can also increase the plastic deformation area of ​​the material. When the bending plate 130 bends, some material will be squeezed towards the bending location, resulting in a "material extrusion" phenomenon. The opening of the first notch 141 can provide space for these materials, reducing the risk of material extrusion from the bending plate 130.

[0028] For example, in order to better achieve the bending of the bending plate 130, in some embodiments, the first notch 141 is designed to be V-shaped. For example, the shape of the first notch 141 is configured such that the two side walls of the first notch 141 gradually taper inward from the opening until they intersect at the bottom and form a relatively sharp angle.

[0029] In this embodiment, the V-shaped structure allows the external force applied to the bending plate 130 to be effectively concentrated at the bottom of the first notch 141. When an external force is applied to the bending plate 130, the sharp corner of the V-shape becomes a stress concentration point, meaning the external force is transmitted along the slope of the V-shaped structure, allowing stress to accumulate at the bottom of the notch. This makes the material in that area more prone to deformation, thereby reducing the external force required to bend the bending plate 130 and optimizing the entire bending process. Compared to notches of other shapes, V-shaped notches are superior in reducing the material's resistance to bending. This is mainly because the V-shaped design allows the material to concentrate stress along a predetermined trajectory at a predetermined location when under stress, thus reducing the difficulty of bending the bending plate 130. Furthermore, another important advantage of the V-shaped structure is its ease of manufacturing, which effectively improves production efficiency.

[0030] It should be noted that the width and depth of the notch 140 have a significant impact on the bending difficulty and structural strength of the bending plate 130. Appropriate notch width and depth can reduce the bending difficulty of the bending plate 130 and reduce the risk of the bending plate 130 breaking.

[0031] In some embodiments, referring to Figure 7, which is an enlarged view of part A in Figure 3, the top width W2 of the second notch 142 is designed to be greater than the bottom width of the second notch 142. For example, on the one hand, the wider opening design allows the externally applied stress to concentrate more at the bottom of the second notch 142 when the bending plate 130 bends, making it easier for the bending plate 130 to bend at that location. On the other hand, the opening of the second notch 142 also provides more space for material flow. When the bending plate 130 bends under external force, some material in the bending plate 130 will shift towards the bending point, resulting in a "material squeezing" phenomenon. The wider opening can provide space for these materials, thereby reducing the risk of "material squeezing" in the bending plate 130.

[0032] In some embodiments, referring to Figure 7, the multiple inner walls surrounding the second notch 142 are designed with rounded transitions. This structural design choice has several advantages. First, by employing a rounded transition design, the shape of the second notch 142 allows stress to be evenly distributed at its bottom, and the curved surface of the rounded end effectively guides stress along the curve, thereby reducing the risk of "extrusion." Furthermore, the rounded transition design is relatively easier to implement during processing. Compared to a straight-edge design, the rounded shape reduces the requirements for processing equipment during forming and cutting, thus reducing costs during production.

[0033] In some embodiments, please refer to Figures 6 and 7, 0.05T≤W1≤T, T≤W2≤5T, where T is the thickness T of the bent plate 130, W1 is the width W1 of the top of the first notch 141, and W2 is the width W2 of the top of the second notch 142.

[0034] For example, in the production process of adapter 100, the first notch 141 is used to guide the forming of the material and prevent the bending plate 130 from "squeezing" during bending. Because this process involves large-tonnage equipment and requires high pressure during production, a first notch 141 with a narrow top width is designed. This effectively limits the flow of material, ensuring that the bending plate 130 is not easily damaged due to excessive deformation during bending. The second notch 142 is used for bending during battery manufacturing. Compared to the application scenario of the first notch 141, this process involves relatively lower equipment tonnage requirements, allowing for different design strategies. To facilitate subsequent bending operations, the top width W2 of the second notch 142 is designed to be wider. This design facilitates the operation of the bending equipment when bending the bending plate 130.

[0035] Experiments have shown that designing the top width W1 of the first notch 141 and the top width W2 of the second notch 142 within the aforementioned parameter ranges ensures that the bending plate 130 is easy to bend while also preventing material extrusion. Specifically, the smaller width W1 of the first notch 141 better controls material flow and reduces stress concentration, while the wider second notch 142 facilitates subsequent bending. This combination of design concepts results in higher reliability of the final adapter 100 in battery manufacturing.

[0036] To ensure that the bending plate 130 is easy to bend while also ensuring its structural strength, in some embodiments, please refer to Figures 6 and 7, 0.25T≤D1≤0.75T, 0.35T≤D2≤0.6T, where T is the thickness of the lead plate 120, D1 is the depth of the first notch 141, and D2 is the depth of the second notch 142.

[0037] Experiments have shown that when the depth D1 of the first notch 141 is less than 1 / 4 of the thickness T of the bending plate 130, the stress distribution during bending is significantly affected. In this case, due to the insufficient depth of the first notch 141, the bending plate 130 cannot effectively concentrate the stress at the bottom of the first notch 141, increasing the difficulty of bending the bending plate 130 and failing to effectively prevent the "material squeezing" phenomenon of the bending plate 130. When the depth D1 of the first notch 141 is greater than 3 / 4 of the thickness T of the bending plate 130, the stress concentration phenomenon of the bending plate 130 during bending is significantly enhanced. In this case, the bending plate 130 will be subjected to local overload, making it prone to breakage. This will not only affect the structural integrity of the bending plate 130 itself but may also pose a safety hazard to the entire battery system, potentially leading to a serious safety accident.

[0038] The design of the depth D2 of the second notch 142 is also crucial to the bending plate 130. When the depth D2 of the second notch 142 is less than 7 / 20 of the thickness T of the bending plate 130, the depth of the second notch 142 is insufficient, causing the bending plate 130 to withstand greater stress during bending. This places more stringent requirements on the bending equipment, ultimately significantly increasing the difficulty of bending the bending plate 130. Conversely, when the depth D2 of the second notch 142 is greater than 3 / 5 of the thickness T of the bending plate 130, the current-carrying capacity of the bending plate 130 may be limited. This is because if the depth of the second notch 142 is too deep, the thickness from the bottom of the second notch 142 to the side of the bending plate near the bottom is insufficient, failing to meet the current flow requirements of the battery at high charge / discharge rates. In other words, insufficient current-carrying capacity may cause heat accumulation, increasing the battery temperature rise and thus reducing the overall performance and safety of the battery.

[0039] In summary, the depth design of the first notch 141 and the second notch 142 has been rigorously designed to ensure that the processing performance and safety of the bent plate 130 are guaranteed while reducing the processing difficulty.

[0040] To further reduce the bending difficulty of the bending plate 130, in some embodiments, referring to FIG2, the connecting plate 110 is provided with at least one notch 150. This notch 150 is located on the side of the connection between the connecting plate 110 and the bending plate 130. For example, by providing the notch 150 on the side of the connection between the connecting plate 110 and the bending plate 130, this embodiment can reduce the width of the bending plate 130 to a certain extent, thereby reducing the force required to be applied during the bending process.

[0041] The design of the notch 150 is not limited to a single form; its shape and size can be adjusted according to actual needs. For example, the notch 150 can be designed as a V-shape, U-shape, or straight line. These different shapes of notches can achieve different degrees of width reduction and can be optimized according to the material properties and bending angle requirements. In addition, the position of the notch 150 can also be fine-tuned to ensure that the stress distribution between the connecting plate 110 and the bending plate 130 is more uniform during the actual bending process, thereby reducing the risk of material damage caused by stress concentration.

[0042] In summary, by providing a notch 150 on the side of the connection between the connecting plate 110 and the bending plate 130, the width of the bending plate 130 can be effectively reduced, the force required to bend the bending plate 130 can be reduced, the bending difficulty can be reduced, and the processing efficiency can be improved.

[0043] In some embodiments, referring to Figures 1, 3, and 5, a bent plate 130 is connected to one side of the connecting plate 110, while a retainer 160 is provided on the opposite side. The retainer 160 is used for mounting the tooling. For example, one end of the retainer 160 is connected to the connecting plate 110 by welding or mechanical fixing, while its other end is bent away from the connecting plate 110 to form a protrusion. This structural design allows the retainer 160 to be effectively engaged in a specific position on the tooling during installation, providing reliable support and ensuring the stability of the adapter 100 during the welding of the tab to the lead plate 120, preventing welding errors caused by displacement, and thus ensuring welding reliability.

[0044] Furthermore, the retaining member 160 acts as a support point during the installation of the fixture, preventing the connecting plate 110 from being directly deformed by the force exerted by the fixture. This structural design ensures the reliability of the electrode welding process and the structural stability of the connecting plate 110.

[0045] This application provides an adapter 100, which includes a connecting plate 110 and a lead plate 120. The connecting plate 110 is connected to the battery terminal, and the lead plate 120 is soldered to the battery tab and connected to one side of the connecting plate 110 via a bending plate 130. The end of the bending plate 130 connected to the lead plate 120 can be bent relative to the other end connected to the connecting plate 110. The battery achieves electrical connection between the terminal and the tab through the adapter 100. The bending plate 130 has at least one notch 140. In this embodiment, the adapter 100, by providing the notch 140 on the bending plate 130, causes significant stress concentration at the notch 140 when an external force is applied to the bending plate 130 for bending. This results in a significantly higher stress at the notch 140 than in other areas of the bending plate 130, making the material at that location more prone to deformation. This stress concentration phenomenon makes the notch 140 a weak point of the bending plate 130, thereby reducing the difficulty of flattening the bending part and the tab.

[0046] This application also provides a battery that includes the aforementioned adapter 100, and the battery also has the beneficial effects of the aforementioned adapter 100, which will not be described in detail here.

Claims

1. An adapter, comprising: Connecting plate (110) is used to connect the pole post; as well as A lead plate (120) is used to connect the tabs and is connected to one side of the connecting plate (110) via a bent plate (130); The bent plate (130) is provided with at least one notch (140).

2. The adapter according to claim 1, wherein, At least one of the notches (140) includes a first notch (141) (140) and a second notch (142) (140), the first notch (141) (140) being close to the connecting plate (110) and the second notch (142) (140) being close to the pin plate (120).

3. The adapter according to claim 2, wherein, The width of the top of the first notch (141) (140) is greater than the width of the bottom of the first notch (141) (140).

4. The adapter according to claim 3, wherein, The first notch (141) (140) is V-shaped.

5. The adapter according to claim 3, wherein, The width of the top of the second notch (142) (140) is greater than the width of the bottom of the second notch (142) (140).

6. The adapter according to claim 2, wherein, The second notch (142) and (140) have a circular arc transition between their multiple inner walls.

7. The adapter according to any one of claims 2-6, wherein, 0.05T≤W1≤T,T≤W2≤5T; where T is the thickness of the bent plate (130), W1 is the width of the top of the first notch (141) (140), and W2 is the width of the top of the second notch (142) (140).

8. The adapter according to any one of claims 2-7, wherein, 0.25T≤D1≤0.75T, 0.35T≤D2≤0.6T; where T is the thickness of the bent plate (130), D1 is the depth of the first notch (141) (140), and D2 is the depth of the second notch (142) (140).

9. The adapter according to any one of claims 1-8, wherein, The other side of the connecting plate (110) is provided with a retaining member (160), which is arranged opposite to the bending plate (130) and is used to install tooling.

10. The adapter according to claim 9, wherein, One end of the retaining member (160) is welded or fixedly connected to the connecting plate (110), and the other end of the retaining member (160) is bent away from the connecting plate (110) to form a protrusion.

11. The adapter according to any one of claims 1-10, wherein, The connecting plate (110) is provided with at least one notch (150), which is located on the side of the connection between the connecting plate (110) and the bending plate (130).

12. The adapter according to claim 11, wherein, The notch (150) 150 is V-shaped, U-shaped or straight.

13. A battery comprising the adapter according to any one of claims 1-12.

Images