Cover plate and battery

Abstract

The utility model provides a cover plate and a battery, and relates to the technical field of batteries. The cover plate comprises a plate body, a pole and a connecting sheet, the plate body is provided with a mounting port, the pole is arranged in the mounting port, the pole is provided with a through hole, and the through hole penetrates through the pole along a preset direction; the connecting piece comprises a connecting piece and a mounting piece which are connected with each other, the mounting piece is arranged in the through hole and is connected with the hole wall of the through hole, and the connecting piece is positioned outside the through hole and is used for being connected with a tab. Compared with an existing solid pole, the pole in the cover plate is of the hollow structure penetrated by the through hole, the mass of the pole is small, the mass of the cover plate is small, and the requirement for light weight of the battery can be met.

Description

Cover and battery Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cover plate and a battery. Background Technology

[0002] A battery generally includes a casing, a cover, and electrode assemblies. The casing has an opening, and the cover is placed over the opening. The electrode assemblies are housed inside the casing. The cover includes terminals and connecting tabs, among other structures. The electrode tabs of the electrode assemblies are connected to the terminals in the cover via the connecting tabs, thus achieving the connection between the electrode assemblies and the terminals.

[0003] However, the large mass of the terminals results in a large mass of the cover plate, which in turn leads to a large mass of the battery, hindering the battery's lightweight design. Summary of the Invention

[0004] In view of this, this application provides a cover plate and a battery to solve the problem that the large mass of the terminal post results in a large mass of the cover plate, which in turn leads to a large mass of the battery, which is not conducive to the lightweighting of the battery.

[0005] According to one aspect of this application, a cover plate is provided, the cover plate including a plate body, an electrode post and a connecting piece, the plate body having an installation opening, the electrode post being disposed in the installation opening, the electrode post having a through hole, the through hole penetrating the electrode post in a predetermined direction;

[0006] The connecting piece includes a connector and a mounting piece that are connected to each other. The mounting piece is disposed inside the through hole and connected to the hole wall of the through hole. The connector is located outside the through hole and is used to connect with the electrode tab.

[0007] Preferably, the cover plate further includes a welded component, which is located on different sides of the plate body in the predetermined direction, and the welded component has a first fixing hole and a second fixing hole, both of which extend along the predetermined direction, and the first fixing hole communicates with the second fixing hole.

[0008] The pole includes a first conductive element, which includes a riveting portion and a main body portion. The riveting portion protrudes from the outer side wall of the main body portion. The main body portion fits against the wall of the first fixing hole, and the riveting portion fits against the wall of the second fixing hole.

[0009] Preferably, the pole further includes a second conductive element and a third conductive element, the second conductive element being connected to the main body, the third conductive element protruding from the outer side wall of the second conductive element, a portion of the second conductive element being located within the mounting opening, and the third conductive element and the welded component being located on different sides of the plate body in the predetermined direction.

[0010] Preferably, the width of the main body is greater than or equal to 0.8 mm;

[0011] And / or, the width of the riveted portion is greater than or equal to 0.2 mm.

[0012] Preferably, the width of the second conductive element is greater than or equal to 1.5 mm;

[0013] And / or, the dimension of the third conductive element in the predetermined direction is greater than or equal to 1.5 mm.

[0014] Preferably, the cover plate further includes a sealing element, which includes a first sealing part and a second sealing part connected to each other. The first sealing part is sleeved on the second conductive element, and the second sealing part protrudes from the outer side wall of the first sealing part. The second sealing part is respectively attached to the plate body and the third conductive element on both sides in the predetermined direction.

[0015] Preferably, the width of the third conductive element is greater than or equal to 1.5 mm.

[0016] Preferably, the cover plate further includes a plastic part, the plastic part including a base plate, the base plate being attached to the side of the plate body opposite to the welded part in the predetermined direction, the base plate having a connecting opening, and a portion of the pole being located within the connecting opening;

[0017] The welded component includes an extension and a fitting portion. The first fixing hole penetrates the extension, and the fitting portion protrudes from the outer side wall of the extension. A portion of the fitting portion is fitted to the side of the base plate opposite to the plate body in the predetermined direction.

[0018] Preferably, the dimension of the second fixing hole in the predetermined direction is greater than or equal to 0.5 mm;

[0019] And / or, the size of the first fixing hole in the predetermined direction is greater than or equal to 1.2 mm and less than or equal to 1.8 mm;

[0020] And / or, the dimension of the bonding portion in the predetermined direction is greater than or equal to 1.2 mm and less than or equal to 1.8 mm;

[0021] And / or, the width of the portion of the adhesive part that is in contact with the base plate is greater than or equal to 1.8 mm and less than or equal to 3.2 mm.

[0022] According to another aspect of this application, a battery is provided, the battery including the cover plate described above.

[0023] In the cover plate of this application, the cover plate includes a plate body, a terminal post, and a connecting piece. The plate body has an installation opening, and the terminal post is disposed within the installation opening. The terminal post has a through hole that penetrates the terminal post in a predetermined direction. The connecting piece includes a connector and a mounting member connected together. The mounting member is disposed within the through hole and connected to the wall of the through hole. The connector is located outside the through hole and is used to connect with a tab. Compared to existing solid terminal posts, the terminal post in the cover plate of this application is a hollow structure penetrated by the through hole. The mass of the terminal post is smaller, and the mass of the cover plate is also smaller, which can meet the lightweight requirements of the battery. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 shows a three-dimensional structural diagram of the cover plate;

[0026] Figure 2 shows a schematic diagram of the planar structure of the cover plate;

[0027] Figure 3 shows a cross-sectional view obtained by cutting the cover plate in Figure 2 along A-A';

[0028] Figure 4 shows an enlarged view of part B in Figure 3;

[0029] Figure 5 shows a schematic diagram of the structure before the pole post is riveted;

[0030] Figure 6 shows a schematic diagram of the structure after the pole post is riveted;

[0031] Figure 7 shows a schematic diagram of the pole piece structure;

[0032] Figure 8 shows a schematic diagram of the welded component.

[0033] Icons: 1-Plate body; 2-Electrical post; 21-First conductive component; 211-Riveting part; 212-Main body; 22-Second conductive component; 23-Third conductive component; 24-Through hole; 3-Connecting piece; 31-Connector; 32-Mounting part; 4-Welding part; 41-Extension part; 42-Fitting part; 43-First fixing hole; 44-Second fixing hole; 5-Sealing component; 51-First sealing part; 52-Second sealing part; 6-Plastic part; 61-Base plate; 62-Enclosure plate; L-Predetermined direction. Detailed Implementation

[0034] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0035] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0036] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0037] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0038] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0039] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0040] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0041] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0042] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0043] According to one aspect of this application, a cover plate is provided, as shown in Figures 1 to 8. The cover plate includes a plate body 1, an electrode post 2, and a connecting piece 3. The plate body 1 has an installation opening, and the electrode post 2 is disposed in the installation opening. The electrode post 2 has a through hole 24, which penetrates the electrode post 2 along a predetermined direction L. The connecting piece 3 includes a connector 31 and a mounting member 32 connected together. The mounting member 32 is disposed in the through hole 24 and connected to the hole wall of the through hole 24. The connector 31 is located outside the through hole 24 and is used to connect with a tab. Compared with the existing solid electrode post, the electrode post 2 in the cover plate of this application is a hollow structure penetrated by the through hole 24. The electrode post 2 has a smaller mass, and the cover plate also has a smaller mass, which can meet the lightweight requirements of the battery.

[0044] Furthermore, the connector 31 is in the form of a sheet, and the mounting piece 32 can be a hollow structure in the shape of a quadrangular prism. In other words, the connector 3 is also a hollow structure, which further reduces the mass of the cover plate.

[0045] In the embodiments of this application, as shown in Figures 3, 4 and 7, the pole post 2 includes a first conductive element 21, a second conductive element 22 and a third conductive element 23. The first conductive element 21 includes a main body portion 212 and a riveting portion 211. The main body portion 212 is connected to the second conductive element 22. A through hole 24 passes through the main body portion 212 and the second conductive element 22. The area of ​​the cross section of the main body portion 212 perpendicular to the predetermined direction L is smaller than the area of ​​the cross section of the second conductive element 22 perpendicular to the predetermined direction L. The riveting portion 211 protrudes from the outer side wall of the main body portion 212. The third conductive element 23 protrudes from the outer side wall of the second conductive element 22. The first conductive element 21 is located outside the mounting opening, a portion of the second conductive element 22 is located inside the mounting opening, and the third conductive element 23 is located outside the mounting opening. The first conductive element 21 and the third conductive element 23 are located on different sides of the plate body 1 in the predetermined direction L. Compared to the pole post 2, which includes a base plate 61 and a pole post 2 body, the pole post 2 of this application can be formed by stamping in one step without secondary processing, thus reducing the processing cost of the pole post 2.

[0046] Optionally, the second conductive element 22 and the third conductive element 23 can be hollow structures in the shape of quadrangular prisms, and the main body 212 and the riveting part 211 can be structures formed by riveting the first conductive element 21, wherein the part that fits against the wall of the second fixing hole 44 is the riveting part 211, and the remaining part is the main body 212.

[0047] It should be noted that the dashed lines shown in Figure 7 are used to divide the pole post 2 into the riveting part 211, the main body part 212, the second conductive element 22 and the third conductive element 23, thereby describing the shape of each part of the pole post 2. The pole post 2 is formed by stamping in one piece, and there are no dividing lines in the solid body of the pole post 2.

[0048] In embodiments of this application, as shown in Figures 3, 4, and 8, the cover plate further includes a welded component 4. The welded component 4 and the connecting component 31 are located on different sides of the plate body 1 in a predetermined direction L. The welded component 4 includes an extension 41 and a fitting portion 42. The extension 41 has a first fixing hole 43 and a second fixing hole 44. The first fixing hole 43 penetrates the extension 41 along the predetermined direction L, and the second fixing hole 44 is recessed from the hole wall of the first fixing hole 43 toward the outside of the first fixing hole 43. The fitting portion 42 protrudes from the outer side wall of the extension 41, and the dimension of the fitting portion 42 in the predetermined direction L is smaller than the dimension of the extension 41 in the predetermined direction L.

[0049] It should be noted that the dashed lines shown in Figure 8 are used to divide the welded part 4 into the extension part 41 and the fitting part 42, thereby describing the shape of each part of the welded part 4. The welded part 4 is formed by stamping in one piece, and there are no dividing lines in the solid of the welded part 4.

[0050] As shown in Figures 4 and 8, the main body 212 fits against the wall of the first fixing hole 43, the riveting part 211 fits against the wall of the second fixing hole 44, and the riveting part 211 is welded to the wall of the second fixing hole 44, thereby fixing the pole post 2 through the welded part 4.

[0051] Optionally, before installing the pole post 2, as shown in Figure 5, the first conductive element 21 is generally in the shape of a quadrangular prism. After assembling the pole post 2 and the welding part 4, the first conductive element 21 is located in the first fixing hole 43, and part of the first conductive element 21 is in contact with the hole wall of the mounting hole. Then, force is applied to the first conductive element 21 to rivet the pole post 2, so that part of the first conductive element 21 is in contact with the hole wall of the second fixing hole 44. The part of the first conductive element 21 that is in contact with the hole wall of the second fixing hole 44 is the riveting part 211, and the rest is the main body part 212. At this time, the state of the pole post 2 is shown in Figure 6.

[0052] In the embodiments of this application, as shown in Figures 3 and 4, the cover plate further includes a plastic component 6, which includes a base plate 61 and a surrounding plate 62. The surrounding plate 62 is arranged around the edge of the base plate 61. The base plate 61 is attached to the side of the plate body 1 opposite to the welding component 4 in a predetermined direction L. The base plate 61 has a connection opening, and part of the pole post 2 is located in the connection opening. Part of the fitting portion 42 is attached to the side of the base plate 61 opposite to the plate body 1 in the predetermined direction L, so that the base plate 61 can insulate between the plate body 1 and the pole post 2. The surrounding plate 62 surrounds the pole post 2 to protect the side of the pole post 2.

[0053] Furthermore, the cover plate also includes a sealing element 5, which includes a first sealing part 51 and a second sealing part 52 connected to each other. The first sealing part 51 is sleeved on the second conductive element 22 to achieve a seal between the second conductive element 22 and the housing. The second sealing part 52 protrudes from the outer side wall of the first sealing part 51. The two sides of the second sealing part 52 in the predetermined direction L are respectively attached to the plate body 1 and the third conductive element 23 to achieve a seal between the third conductive element 23 and the housing.

[0054] Preferably, the first sealing part 51 and the second sealing part 52 are integrally formed.

[0055] In the embodiments of this application, as shown in FIG7, the width T1 of the main body 212 is greater than or equal to 0.8mm; the width T2 of the riveting part 211 is greater than or equal to 0.2mm, that is, T1≥0.8mm and T2≥0.2mm, which can ensure the connection strength between the pole post 2 and the welded part 4 after the first conductive part is riveted.

[0056] Optionally, the width T1 of the main body 212 can be 0.8mm, 0.82mm, 0.85mm or 0.87mm, etc., and the width T2 of the riveting part 211 can be 0.2mm, 0.21mm, 0.22mm or 0.23mm, etc.

[0057] Furthermore, the width T3 of the second conductive element 22 is greater than or equal to 1.5 mm; the dimension T4 of the third conductive element 23 in the predetermined direction L is greater than or equal to 1.5 mm, that is, T3≥1.5 mm and T4≥1.5 mm. This makes the pole post 2 itself have sufficient strength to meet the connection requirements between the pole post 2 and the connecting piece 3 and between the pole post 2 and the welding part 4.

[0058] Optionally, the width T3 of the second conductive element 22 can be 1.5mm, 1.6mm, 1.7mm, or 1.8mm, etc., and the dimension T4 of the third conductive element 23 in the predetermined direction L can be 1.5mm, 1.6mm, 1.7mm, or 1.8mm, etc. Preferably, the width T3 of the second conductive element 22 is equal to the dimension T4 of the third conductive element 23 in the predetermined direction L.

[0059] In addition, the width T5 of the third conductive element 23 is greater than or equal to 1.5mm, that is, T5≥1.5mm. This ensures that after the sealing ring is compressed, the third conductive element 23 and the second sealing part 52 are completely fitted together, thereby ensuring the sealing effect.

[0060] Optionally, the width T5 of the third conductive element 23 can be 1.5mm, 1.6mm, 1.7mm or 1.8mm, etc.

[0061] In the embodiments of this application, as shown in FIG4, the width t2 of the part of the fitting part 42 that fits with the base plate 61 is greater than or equal to 1.8mm and less than or equal to 3.2mm, that is, 1.8mm≤t2≤3.2mm. This ensures that when the pole post 2 is riveted, the upward deformation of the welded part 4 will not press the plastic part 6.

[0062] Optionally, the width t2 of the part of the bonding part 42 that is bonded to the base plate 61 can be 1.8mm, 1.82mm, 1.85mm or 1.87mm, etc.

[0063] Furthermore, as shown in Figure 8, the dimension t3 of the first fixing hole 43 in the predetermined direction L is greater than or equal to 1.2 mm and less than or equal to 1.8 mm, i.e., 1.2 mm ≤ t3 ≤ 1.8 mm; the dimension t4 of the fitting part 42 in the predetermined direction L is greater than or equal to 1.2 mm and less than or equal to 1.8 mm, i.e., 1.2 mm ≤ t4 ≤ 1.8 mm. This ensures that the welding block itself has sufficient strength, thereby meeting the connection requirements between the pole post 2 and the welding block.

[0064] Optionally, the dimension t3 of the first fixing hole 43 in the predetermined direction L can be 1.2mm, 1.23mm, 1.25mm or 1.27mm, etc.; the dimension t4 of the fitting part 42 in the predetermined direction L can be 1.2mm, 1.23mm, 1.25mm or 1.27mm, etc.

[0065] In addition, the dimension t1 of the second fixing hole 44 in the predetermined direction L is greater than or equal to 0.5mm, that is, t1≥0.5mm, which can ensure the connection strength between the pole post 2 and the welded part 4 after the first conductive part is riveted.

[0066] Optionally, the dimension t1 of the second fixing hole 44 in the predetermined direction L can be 0.5mm, 0.51mm, 0.53mm or 0.54mm, etc.

[0067] In addition, by setting the dimensions of the pole post 2 and the welded part 4 within the above-mentioned range, the connection stability and reliability of the pole post 2 and the welded part 4 are ensured.

[0068] In the cover plate of this application, there are two pole posts 2. Each pole post 2 is provided with a connecting piece 3, a plastic part 6, a sealing ring and a welding part 4. One of the two pole posts 2 is used to connect with the positive electrode tab in the pole post 2 of the battery, and the other pole post 2 is used to connect with the negative electrode tab in the pole post 2 of the battery.

[0069] According to another aspect of this application, a battery is provided, which includes the cover plate described above. The battery has the same technical effects as the cover plate described above, which will not be repeated here.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cover plate, characterized in that, The cover plate includes a plate body, an electrode post, and a connecting piece. The plate body has an installation opening, the electrode post is disposed in the installation opening, and the electrode post has a through hole that penetrates the electrode post in a predetermined direction. The connecting piece includes a connector and a mounting member connected together. The mounting member is disposed in the through hole and connected to the hole wall of the through hole. The connector is located outside the through hole and is used to connect with an electrode tab.

2. The cover plate according to claim 1, characterized in that, The cover plate also includes a welded component, which is located on different sides of the plate body in the predetermined direction. The welded component has a first fixing hole and a second fixing hole, both of which extend along the predetermined direction. The first fixing hole communicates with the second fixing hole. The pole post includes a first conductive component, which includes a riveting portion and a main body portion. The riveting portion protrudes from the outer side wall of the main body portion. The main body portion fits against the wall of the first fixing hole, and the riveting portion fits against the wall of the second fixing hole.

3. The cover plate according to claim 2, characterized in that, The pole also includes a second conductive element and a third conductive element. The second conductive element is connected to the main body, and the third conductive element protrudes from the outer side wall of the second conductive element. A portion of the second conductive element is located inside the mounting opening, and the third conductive element and the welded component are located on different sides of the plate body in the predetermined direction.

4. The cover plate according to claim 2, characterized in that, The width of the main body is greater than or equal to 0.8 mm; and / or the width of the riveted part is greater than or equal to 0.2 mm.

5. The cover plate according to claim 3, characterized in that, The width of the second conductive element is greater than or equal to 1.5 mm; and / or the dimension of the third conductive element in the predetermined direction is greater than or equal to 1.5 mm.

6. The cover plate according to claim 3, characterized in that, The cover plate also includes a sealing element, which includes a first sealing part and a second sealing part connected to each other. The first sealing part is sleeved on the second conductive element, and the second sealing part protrudes from the outer side wall of the first sealing part. The two sides of the second sealing part are respectively attached to the plate body and the third conductive element in the predetermined direction.

7. The cover plate according to claim 6, characterized in that, The width of the third conductive element is greater than or equal to 1.5 mm.

8. The cover plate according to claim 2, characterized in that, The cover plate also includes a plastic component, which includes a base plate. The base plate is attached to the side of the plate body opposite to the weldment in the predetermined direction. The base plate has a connecting opening, and a portion of the pole post is located within the connecting opening. The weldment includes an extension and a fitting portion. The first fixing hole penetrates the extension, and the fitting portion protrudes from the outer side wall of the extension. A portion of the fitting portion is attached to the side of the base plate opposite to the plate body in the predetermined direction.

9. The cover plate according to claim 8, characterized in that, The second fixing hole has a size greater than or equal to 0.5 mm in the predetermined direction; and / or the first fixing hole has a size greater than or equal to 1.2 mm and less than or equal to 1.8 mm in the predetermined direction; And / or, the dimension of the bonding portion in the predetermined direction is greater than or equal to 1.2 mm and less than or equal to 1.8 mm; And / or, the width of the portion of the adhesive part that is in contact with the base plate is greater than or equal to 1.8 mm and less than or equal to 3.2 mm.

10. A battery, characterized in that, The battery includes the cover plate according to any one of claims 1-9.

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