Battery pole, cover plate assembly and battery

Abstract

The utility model provides a battery pole, a cover plate assembly and a battery, the battery pole comprises a pole body, the pole body comprises at least two connected metal pieces, and the outer wall of at least one metal piece and / or the boundary position of the outer walls of the adjacent metal pieces are / is provided with a concave part. The utility model has the beneficial effects that the stress and heat generated by the electrode posts in the working process of the battery can be released, so that the stability of the battery can be improved, and the probability of badness and damage of the battery is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery terminal, a cover plate assembly, and a battery. Background Technology

[0002] In the battery manufacturing process, the terminals are the components that connect the inside and outside of the battery. Since the various parts of the terminals need to connect to different devices inside and outside the battery, the stability of their interconnection is crucial and directly affects the battery's electrical performance and safety.

[0003] In related technologies, multiple pillars are used to manufacture the battery electrodes. For example, two different materials, such as copper and aluminum, are used to manufacture the pillars and form the negative electrode pillar of the battery. This allows for a stable connection with other battery structures when installed in the battery, thereby reducing costs while ensuring electrical performance.

[0004] However, during use, the current generated by the battery causes the temperature of the terminals to rise. When multiple terminals are used to form the battery electrodes, significant stress and heat will be generated on two terminals, especially at the contact point. Under these circumstances, the battery's operating condition is easily affected, such as affecting the battery's stability and causing damage and malfunctions. Utility Model Content

[0005] The embodiments of this utility model provide a battery terminal, a cover plate assembly, and a battery, which can improve the technical problem that battery terminals are prone to stress and heat generation.

[0006] In a first aspect, embodiments of the present invention provide a battery terminal, comprising:

[0007] The electrode body includes at least two connected metal parts, and a recess is provided at the outer wall of at least one of the metal parts and / or at the boundary position of the outer wall of the adjacent metal parts.

[0008] In one embodiment, the recess is spaced apart from the dividing position on the outer wall of the metal part.

[0009] In one embodiment, the distance between the end of the recess near the dividing position and the dividing position is less than or equal to 1.5 mm.

[0010] In one embodiment, adjacent metal parts have notches on their outer walls near the dividing position, and the adjacent notches together form the recess.

[0011] In one embodiment, the outer walls of adjacent metal parts are staggered.

[0012] In one embodiment, the normal distance X between the outer walls of adjacent metal parts is less than or equal to 5 mm.

[0013] In one embodiment, the opening spacing of the cross-section of the recess is less than or equal to 3 mm, and / or the depth of the recess is less than or equal to 3 mm.

[0014] In one embodiment, the recess is provided around the outer periphery of the metal part.

[0015] In one embodiment, the inner wall surface area of ​​the recess is less than or equal to 500 mm². 2 .

[0016] In one embodiment, the material used to prepare at least one of the metal parts is different from the material used to prepare the adjacent metal parts.

[0017] In one embodiment, the materials used to manufacture two adjacent metal parts are copper and aluminum, respectively.

[0018] In one embodiment, the pole body is formed by molding a copper-aluminum composite plate.

[0019] Secondly, embodiments of the present invention provide a cover plate assembly, including the battery terminals as described above.

[0020] Thirdly, embodiments of the present invention provide a battery, including the battery terminals as described above or the cover assembly as described above.

[0021] The beneficial effects of the embodiments of this utility model are as follows:

[0022] In embodiments of this utility model, by forming a recess on the outer wall of the metal part or at the boundary where adjacent metal parts are connected, the stress and heat generated by the electrode posts during battery operation can be released through the recess, thereby improving the stability of the battery, reducing the probability of battery malfunction and damage, and ensuring stable operation of the battery for a long time. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a cross-sectional schematic diagram of a first structure of a battery terminal provided in an embodiment of this utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of point M in the middle;

[0026] Figure 3 This is a partial cross-sectional schematic diagram of a second structure of a battery terminal provided in an embodiment of this utility model;

[0027] Figure 4 This is a partial cross-sectional schematic diagram of a third structure of a battery terminal provided in an embodiment of this utility model;

[0028] Figure 5 This is a partial cross-sectional view of a fourth structure of a battery terminal provided in an embodiment of this utility model. Figure 1 ;

[0029] Figure 6 This is a partial cross-sectional view of a fourth structure of a battery terminal provided in an embodiment of this utility model. Figure 2 ;

[0030] Figure 7 This is a partial cross-sectional schematic diagram of the fifth structure of a battery terminal provided in an embodiment of this utility model;

[0031] Figure 8 This is a partial cross-sectional view of a fourth structure of a battery terminal provided in an embodiment of this utility model. Figure 3 .

[0032] Explanation of reference numerals in the attached figures:

[0033] 100, pole body; 100a, metal part; 101, first metal part; 102, second metal part; 200, recessed part; 200a, notch. Detailed Implementation

[0034] 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 scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, 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.

[0035] According to a first aspect of this application, this application provides a battery terminal, please refer to... Figure 1 and Figure 2As shown, Figure 1 This is a schematic cross-sectional view of a battery terminal provided in one embodiment of this application. Figure 2 for Figure 1 Enlarged schematic diagram of point M in the middle.

[0036] The battery terminal provided in this application includes a terminal body 100, wherein the terminal body 100 includes at least two connected metal parts 100a, and a recess 200 is provided at the outer wall of at least one of the metal parts 100a and / or at the boundary position of the outer wall of adjacent metal parts 100a.

[0037] It is understandable that when battery terminals are used in batteries, both ends of the terminal body 100 can be connected to other parts of the battery structure or external structures. For example, one end of the terminal body 100 can be connected to the battery terminal block by welding and used to connect to an external connecting piece, while the other end can be connected to an electrode connecting piece, thereby enabling the battery to supply power. By setting the terminal body 100 in the form of multiple metal parts 100a, the connection requirements of different scenarios can be met. For example, metal parts 100a of different materials can be used to connect to other structures of different materials, thereby ensuring electrical performance and reducing production costs while making the connection (e.g., welding) between the terminal body 100 and other structures more stable and reducing resistance.

[0038] Multiple metal parts 100a are connected together. Adjacent metal parts 100a can be connected in a close-fitting manner, such as forming a curved surface contact between two metal parts 100a. Stress and heat may be generated at the contact connection points of adjacent metal parts 100a, especially at the outer wall edges. Therefore, in this embodiment, a recess 200 is formed at the outer wall of the metal part 100a or at the boundary of the connection between adjacent metal parts 100a. This recess 200 can release the stress and heat generated by the electrode posts during battery operation, thereby improving battery stability, reducing the probability of battery malfunction and damage, and ensuring long-term stable operation of the battery. In some embodiments of this application, the boundary specifically includes the location of the boundary line between the outer walls of two adjacent metal parts 100a. Specifically, refer to... Figures 1-8 In the diagram, the indicator line Y represents the dividing line.

[0039] In some embodiments of this application, the pole body 100 includes two metal parts 100a, such as... Figures 2-8 In the first metal part 101 and the second metal part 102, the recess 200 is formed on the sidewall of one of the two metal parts 100a. Specifically, refer to Figure 1 and Figure 2As shown, in this embodiment, the recess 200 at the pole body 100 is specifically located at one end of the outer wall of the metal part 100a in the upper part of the figure, near the dividing position, so as to better release stress and heat.

[0040] In other embodiments of this application, depending on actual needs, there can be multiple recesses 200. For example, at least one recess 200 may be provided on the outer wall of each metal part 100a, or a recess 200 may be provided at the boundary position between the outer wall of the metal part 100a and the outer wall of the adjacent metal part 100a, so as to better realize the release of stress and heat.

[0041] Figure 5 This is a cross-sectional schematic diagram of a battery terminal provided in another embodiment of this application. In this embodiment, the recess 200 is located at the boundary position of the outer wall of the adjacent metal part 100a, that is, as shown... Figure 5 The battery terminal shown has a recessed portion 200 located at a dividing line Y, which divides the recessed portion 200 into upper and lower parts. Specifically, during the fabrication of the terminal body 100, notches 200a are respectively made on the outer walls of two adjacent metal parts 100a near the dividing position. Based on the stacked arrangement of the two metal parts 100a, the adjacent notches 200a enclose each other to form the recessed portion 200. Thus, the two notches 200a formed on the metal parts 100a can be joined to form a single recessed portion 200. This recessed portion 200 is located at a point of high stress concentration on the terminal body 100, thereby achieving better stress and heat release. This, when applied to batteries, reduces battery failure and defect rates and improves the stability of battery power supply.

[0042] In some embodiments of this application, the recess 200 is provided around the outer periphery of the metal part 100a, such as for Figure 3 The battery terminal shown has a recessed portion 200 around the first metal part 101 above the dividing line Y. By setting the recessed portion 200 around the metal part 100a, the stress and heat of the terminal can be released evenly. At this time, the recessed portion 200 of the battery terminal is a ring structure.

[0043] Based on the overall dimensions of the metal part 100a, the inner wall surface area of ​​the recess 200 can be set to achieve sufficient stress and heat release. In a specific embodiment of this application, the inner wall surface area of ​​the recess 200 is less than or equal to 500 mm². 2 More specifically, it can be set to less than 500mm. 2 This approach effectively enhances stress and heat release while ensuring the overall structural integrity of the battery terminals and the stability of their electrical performance.

[0044] This application Figures 1-8 The structural diagrams of the battery terminals shown are all cross-sectional diagrams of the terminals. It can be understood that the overall structure of the battery terminals can be set according to the actual situation. For example, the terminal body 100 is composed of square or cylindrical metal parts 100a, and the final battery terminal can be square or cylindrical.

[0045] Furthermore, this application does not impose specific limitations on the structure of the recess 200. For example, in one specific embodiment, for a cylindrical metal part 100a, the recess 200 is provided around the outer periphery of the metal part 100a. In this case, the recess 200 is specifically annular. In other alternative embodiments, the recess 200 can also be a concave point, groove, etc. of various shapes. For example, if the recess 200 is a concave point, multiple concave points are distributed at equal intervals on the outer periphery of the metal part 100a, which can also achieve a certain degree of uniform release of battery terminal stress and heat.

[0046] In some embodiments of this application, the recess 200 is provided at a distance from the dividing position on the outer wall of the metal part 100a.

[0047] Reference Figure 3 and Figure 4 The figures shown are cross-sectional schematic diagrams of the battery terminals provided in two embodiments. In this battery terminal, the terminal body 100 includes two connected metal parts 100a, namely a first metal part 101 and a second metal part 102. An example is given where the first metal part 101 is made of aluminum and the second metal part 102 is made of copper. Figure 3 In the illustrated embodiment, the recess 200 is specifically located on the outer wall of the first aluminum metal part 101, and is spaced apart from the dividing position. Figure 4 In the illustrated embodiment, the recess 200 is specifically located on the outer wall of the copper second metal part 102, and is spaced a certain distance from the boundary position. On the one hand, the recess 200 is close to the boundary position on the outer wall of the metal part 100a to improve the effect of stress and heat release on the battery terminal. On the other hand, the recess 200 is located on the outer wall of the metal part 100a and is a certain distance from the edge of the metal part 100a, so that the metal part 100a is easier to process and can improve the yield rate during battery terminal manufacturing.

[0048] In some embodiments of this application, the distance between the end of the recessed portion 200 of the battery terminal near the dividing position and the dividing position is less than or equal to 1.5 mm, thereby ensuring that a better stress and heat release effect can be obtained.

[0049] Reference Figure 3 and Figure 4 The distance between the end of the recessed portion 200 near the dividing position and the dividing position shown is the distance between the edge of the recessed portion 200 and the dividing line Y. In some cases, the outer wall of the metal part 100a is not a straight plane, or the outer wall of the metal part 100a with the recessed portion 200 is not parallel to the outer wall of other adjacent metal parts 100a. For example... Figure 3 In the process, the outer wall of the first metal part 101 and the outer wall of the second metal part 102 are not on the same vertical plane, for example... Figure 4 In this case, the cross-section of the outer wall of the second metal part 102 has a certain curvature. At this time, the aforementioned distance, i.e., the normal distance between the end of the recessed portion 200 near the boundary position and the boundary line Y, is... Figure 3 The spacing d1 marked in the battery terminals shown, and Figure 4 The spacing d2 is marked in the battery terminals shown.

[0050] In some embodiments of this application, the outer walls of adjacent metal parts 100a are misaligned.

[0051] Specifically, refer to Figure 6 and Figure 7 The battery terminal shown includes a terminal body 100 comprising a first metal component 101 and a second metal component 102. The first metal component 101 is positioned above the second metal component 102. From this cross-sectional view, the outer walls of the first metal component 101 and the second metal component 102 are on different surfaces. For example, in a square terminal with a straight outer wall, the surfaces of the first metal component 101 and the second metal component 102 on the same side are not on the same vertical plane. For a cylindrical terminal with a curved outer wall, the outer walls of the first metal component 101 and the second metal component 102 are not on the same curved surface. Figure 6 In this configuration, the outer wall of the second metal part 102 protrudes outward relative to the outer wall of the first metal part 101, thus creating a misaligned arrangement between the two outer walls. And as... Figure 7 In this configuration, the outer wall of the first metal part 101 protrudes outward relative to the outer wall of the second metal part 102, thus creating a staggered arrangement between the two outer walls. Therefore, by setting the outer walls of adjacent metal parts 100a in a staggered manner, the overall manufacturing of the battery terminals is facilitated.

[0052] In some embodiments of this application, the normal distance X between the outer walls of adjacent metal parts 100a is less than or equal to 5 mm.

[0053] Reference Figure 6 and Figure 7 The battery terminals shown above have a normal distance of X, which is the distance shown in the figure. For the cylindrical first metal part 101 and the second metal part 102, this distance X can also be regarded as the difference between the radii of the first metal part 101 and the second metal part 102.

[0054] In some embodiments of this application, the opening spacing of the cross-section of the recess 200 is less than or equal to 3 mm, and / or the depth of the recess 200 is less than or equal to 3 mm.

[0055] Reference Figure 8 As shown, in this embodiment, the cross-section of the recessed portion 200 is arc-shaped, and the distance between the openings of its cross-section is the distance between the two edges of the opening. Figure 8 The spacing B1 indicated in the figure, the depth of the recess 200 is the vertical distance from the bottom of the recess 200 to the outer wall surface of the metal part 100a, such as Figure 8 The distance A1 shown is used to ensure that the recess 200 can better release the stress and heat of the pole by ensuring the spacing of the cross-sectional openings of the recess 200 or the depth of the recess 200.

[0056] In some embodiments of this application, at least one of the metal parts 100a is made of a material different from that of the adjacent metal parts 100a.

[0057] Specifically, the plurality of metal parts 100a include a first metal part 101 and a second metal part 102 connected to each other along the metal part axial direction, wherein the material of the first metal part 101 is different from the material of the second metal part 102.

[0058] In some applications, to reduce costs, other battery components connected to the battery terminals are made of different materials. Based on this, refer to... Figures 2-8 As shown in some embodiments of this application, the electrode body 100 includes two metal parts 100a, namely a first metal part 101 and a second metal part 102 stacked vertically, that is, connected to each other along the axial direction of the metal parts of the electrode body 100. The first metal part 101 and the second metal part 102 are made of different materials, which reduces costs and facilitates welding with other battery structures of the same material, thereby reducing welding difficulty and improving the battery's electrical performance. For example, when the electrode connecting piece is made of copper and the battery terminal is made of aluminum, the first metal part 101 can be made of aluminum for welding with the battery terminal and connecting the external connecting piece, while the second metal part 102 can be made of copper for welding with the copper electrode connecting piece. In this case, welding with the same material ensures that the melting points of the two materials are consistent, thereby reducing welding difficulty, reducing resistance, and better preventing structural cracking. This ensures electrical performance while reducing the manufacturing cost of the battery electrode and the battery as a whole.

[0059] In some embodiments of this application, the materials used to prepare two adjacent metal parts 100a are copper and aluminum, respectively.

[0060] Specifically, in this embodiment, the electrode body 100 is formed based on a copper-aluminum composite plate and a cold heading process, thereby obtaining multiple metal parts 100a constituting the electrode body 100. For example, the first metal part 101 of the multiple metal parts 100a is composed of the aluminum part in the copper-aluminum composite plate, and the second metal part 102 in the electrode body 100 is composed of the aluminum part in the copper-aluminum composite plate, thereby ensuring a stable connection between the two parts, thereby improving the push, tensile and torsional resistance of the battery electrode, and ensuring the electrical performance of the composite electrode.

[0061] The battery terminals in the above embodiments include, but are not limited to, the negative terminal for the battery.

[0062] According to a second aspect of this application, a cover assembly is provided, including battery terminals as described above.

[0063] The cover plate assembly of this application embodiment has the same or similar technical effects as the battery terminal described above, and will not be described in detail here.

[0064] In one specific embodiment, the negative terminal of the cover assembly uses the aforementioned battery terminal. During the assembly of the cover assembly, the battery terminal is placed first, and then the other parts of the cover assembly are installed in sequence, such as the plastic parts, sealing rings, top cover, terminal clamps, etc. The battery terminal is welded to the terminal clamp. Specifically, the first metal part 101, which is also made of aluminum, is welded to the terminal clamp, while the second metal part 102 is used to weld to the negative electrode connecting piece, which is also made of copper. Finally, the finished cover assembly is formed. The cover assembly obtained in this way has a lower manufacturing cost and can ensure the electrical performance and stability of the battery.

[0065] According to a third aspect of this application, a battery is proposed, comprising battery terminals as described above or a cover assembly as described above.

[0066] The battery in this application embodiment can be a square battery, a cylindrical battery, etc., and is included, but is not limited to, applications in vehicles such as electric vehicles and hybrid vehicles, and mobile devices such as mobile phones and tablets. The battery in this application embodiment has the same or similar technical effects as the battery terminal and cover plate assemblies described above, and will not be repeated here. In addition, when specifically applied to relevant application scenarios, it can improve the power supply performance and safety of the device.

[0067] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery terminal, characterized in that, include: The pole body (100) includes at least two connected metal parts (100a), and a recess (200) is provided at the outer wall of at least one of the metal parts (100a) and / or at the boundary position of the outer wall of the adjacent metal parts (100a).

2. The battery terminal according to claim 1, characterized in that, The recess (200) is spaced apart from the dividing position on the outer wall of the metal part (100a).

3. The battery terminal according to claim 2, characterized in that, The distance between the end of the recess (200) near the dividing position and the dividing position is less than or equal to 1.5 mm.

4. The battery terminal according to claim 1, characterized in that, The adjacent metal parts (100a) have notches (200a) on their outer walls near the dividing position, and the adjacent notches (200a) together form the recess (200).

5. The battery terminal according to claim 1, characterized in that, The outer walls of adjacent metal parts (100a) are offset.

6. The battery terminal according to claim 5, characterized in that, The normal distance X between the outer walls of adjacent metal parts (100a) is less than or equal to 5 mm.

7. The battery terminal according to any one of claims 1-6, characterized in that, The opening spacing of the cross section of the recess (200) is less than or equal to 3 mm, and / or the depth of the recess (200) is less than or equal to 3 mm.

8. The battery terminal according to any one of claims 1-6, characterized in that, The recess (200) is provided around the outer periphery of the metal part (100a).

9. The battery terminal according to claim 8, characterized in that, The inner wall surface area of ​​the recess (200) is less than or equal to 500 mm². 2 .

10. The battery terminal according to any one of claims 1-6, characterized in that, The material used to prepare at least one of the metal parts (100a) is different from the material used to prepare the adjacent metal parts (100a).

11. The battery terminal according to claim 10, characterized in that, The two adjacent metal parts (100a) are made of copper and aluminum, respectively.

12. A cover plate assembly, characterized in that, Includes the battery terminals as described in any one of claims 1-11.

13. A battery, characterized in that, Includes the battery terminal as described in any one of claims 1-11 or the cover assembly as described in claim 12.

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