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 pole and an electric connecting piece, the pole is provided with a first placement hole, and the first placement hole extends along a preset direction; the electric connecting piece comprises a first connecting part and a second connecting part, the first connecting part is arranged in the first placement hole and connected with the hole wall of the first placement hole, the second connecting part is located outside the first placement hole and connected with the pole, and the first connecting part is used for being connected with a tab. Therefore, the tab of the pole group can extend into the first mounting hole to be connected with the first connecting part, so that the current of the pole group can be directly led out through the electric connecting piece, the flowing path of the current is shortened, and the internal resistance of the battery is reduced.

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 typically includes connecting tabs, a casing, electrode arrays, and a cover. The casing encloses a receiving space and has an opening that communicates with the receiving space. The cover covers the opening and is connected to the casing. The electrode arrays are disposed within the receiving space, and the electrode tabs of the electrode arrays are connected to the terminals in the cover via connecting tabs.

[0003] However, when the battery is in use, the current of the electrode group needs to be drawn out through the connecting pieces and terminals, the current flow path is relatively long, and the internal resistance of the battery is relatively large. Summary of the Invention

[0004] In view of this, this application provides a cover plate and a battery to solve the problem that the current of the electrode group needs to be led out through the connecting piece and the terminal post, the current flow path is long, and the internal resistance of the battery is large.

[0005] According to one aspect of this application, a cover plate is provided, the cover plate including a pole and an electrical connector, the pole having a first mounting hole extending in a predetermined direction;

[0006] The electrical connector includes a first connecting part and a second connecting part. The first connecting part is disposed in the first mounting hole and connected to the hole wall of the first mounting hole. The second connecting part is located outside the first mounting hole and connected to the pole post. The first connecting part is used to connect to the electrode tab.

[0007] Preferably, the electrical connector further includes a separator, which is connected to the side of the first connecting portion opposite to the second connecting portion in the predetermined direction. The separator is located within the first mounting hole, and at least one of the two portions of the first connecting portion located on both sides of the separator is capable of being connected to the electrode tab.

[0008] Preferably, a plane perpendicular to the predetermined direction is defined as a projection plane, and the orthographic projection of the first connecting part on the projection plane is located inside the orthographic projection of the second connecting part on the projection plane;

[0009] The pole post is also provided with a second mounting hole, which communicates with the first mounting hole. The diameter of the second mounting hole is larger than that of the first mounting hole. The second connecting part is disposed in the second mounting hole and is connected to the hole wall of the second mounting hole.

[0010] Preferably, the cover plate further includes a welded component and a plate body. The plate body has an installation opening that extends through the plate body in a predetermined direction. The pole is disposed on the installation opening. The welded component and the electrical connector are respectively disposed on both sides of the plate body in the predetermined direction. The pole is connected to the welded component.

[0011] Preferably, the welded component has a first fixing hole and a second fixing hole, the first fixing hole and the second fixing hole are connected to the side of the plate body opposite to the plate body in the predetermined direction, the diameter of the first fixing hole is larger than the diameter of the second fixing hole, the pole is in contact with the hole wall of the first fixing hole and the hole wall of the second fixing hole respectively, and the minimum distance between the hole wall of the first fixing hole and the hole wall of the second fixing hole is greater than or equal to 0.3mm.

[0012] According to another aspect of this application, a battery is provided, the battery including a housing and the aforementioned cover plate, the housing having an opening, the cover plate covering the opening.

[0013] Preferably, the battery further includes an electrode assembly, which includes an electrode assembly body and a tab. The tab extends from the electrode assembly body and includes a fitting portion and an extension portion. A first end of the extension portion is connected to the electrode assembly, and a second end of the extension portion is connected to the fitting portion. A portion of the extension portion is located within the first mounting hole, and the fitting portion is connected to the first connecting portion.

[0014] Preferably, the extension is bent within the first mounting hole, and the minimum distance between the extension and the wall of the first mounting hole is greater than or equal to 0.8 mm and less than or equal to 2.0 mm.

[0015] Preferably, the distance between the fitting portion and the separator is greater than 0 mm and less than or equal to 1.0 mm.

[0016] Preferably, the distance between the end face of the pole facing away from the pole group in the predetermined direction and the first end of the extension is a first distance, the length of the extension is a second distance, and the difference between the second distance and the first distance is greater than or equal to 3 mm and less than or equal to 8 mm.

[0017] The cover plate of this application includes a plate body, terminals, and electrical connectors. The plate body has an installation opening that extends through the plate body in a predetermined direction. The terminals are disposed on the installation opening and have a first mounting hole that extends in a predetermined direction. The electrical connectors include a first connecting portion and a second connecting portion. The first connecting portion is disposed within the first mounting hole and connected to the wall of the first mounting hole. The second connecting portion is located outside the first mounting hole and connected to the terminal. The first connecting portion is used to connect with the tabs. Thus, the tabs of the electrode assembly can extend into the first mounting hole and connect with the first connecting portion, allowing the current of the electrode assembly to be directly led out through the electrical connectors. This shortens the current flow path and reduces the internal resistance of the battery. Attached Figure Description

[0018] 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.

[0019] Figure 1 shows a schematic diagram of the planar structure of the cover plate;

[0020] Figure 2 shows a cross-sectional view of the cover plate in Figure 1 obtained by cutting along A-A';

[0021] Figure 3 shows a cross-sectional view of the pole post;

[0022] Figure 4 shows a cross-sectional view of the welded component;

[0023] Figure 5 shows a three-dimensional structural diagram of the battery;

[0024] Figure 6 shows a schematic diagram of the battery's planar structure;

[0025] Figure 7 shows a cross-sectional view of the battery in Figure 6 obtained by cutting along B-B'.

[0026] Figure 8 shows an enlarged view of part C in Figure 7;

[0027] Figure 9 shows the relative positions of the electrode tab and the cover plate when the tab is not bent.

[0028] Icons: 1-Plate body; 2-Electrical connector; 21-First connecting part; 22-Second connecting part; 3-Pole post; 31-First conductive part; 311-Fixing section; 312-Riveting section; 32-Second conductive part; 33-Third conductive part; 34-Fourth conductive part; 35-First mounting hole; 36-Second mounting hole; 4-Separator; 5-Sealing ring; 51-First sealing part; 52-Second sealing part; 6-Welded part; 61-First 62-Second fixing hole; 63-Connecting hole; 7-Plastic part; 71-Support plate; 72-Enclosure plate; 8-Housing; 9-Electrode assembly; 91-Electrode assembly body; 92-Electrode ear; 921-Fitting part; 922-Extension part; 9221-First extension section; 9222-First bending section; 9223-Second extension section; 9224-Second bending section; S1-First mounting part; S2-Second mounting part; L-Determined direction. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] According to one aspect of this application, a cover plate is provided, as shown in Figures 1 to 4. The cover plate includes a terminal post 3 and an electrical connector 2. The terminal post 3 has a first mounting hole 35 extending in a predetermined direction L. The electrical connector 2 includes a first connecting portion 21 and a second connecting portion 22. The first connecting portion 21 is disposed within the first mounting hole 35 and connected to the hole wall of the first mounting hole 35. The second connecting portion 22 is located outside the first mounting hole 35 and connected to the terminal post 3. The first connecting portion 21 is used to connect with a tab 92. In this way, the tab 92 of the electrode assembly 9 can extend into the first mounting hole 35 and connect with the first connecting portion 21. The current of the electrode assembly 9 can be directly led out through the electrical connector 2, shortening the current flow path and thus reducing the internal resistance of the battery.

[0039] In addition, the tabs 92 of the electrode assembly 9 extend into the first fixing hole 61, which reduces the space occupied by the tabs 92 in the housing 8, thereby improving the space utilization of the battery housing 8.

[0040] In the embodiments of this application, as shown in Figures 2 and 3, the cover plate includes a plate body 1. The plate body 1 has an installation opening that penetrates the plate body 1 along a predetermined direction L. The pole post 3 is disposed on the installation opening. The pole post 3 also has a second mounting hole 36, the diameter of which is larger than the diameter of the first mounting hole 35. A second connecting part 22 is disposed inside the second mounting hole 36 and is welded to the hole wall of the second mounting hole 36. In this way, by disposing of the first connecting part 21 and the second connecting part 22 in the first mounting hole 35 and the second mounting hole 36, which have different diameters, the stability of the electrical connector 2 during installation can be ensured.

[0041] Preferably, both the first connecting portion 21 and the second connecting portion 22 are cuboid in shape. The projection of the first connecting portion 21 along the predetermined direction L onto the reference plane is located inside the projection of the second connecting portion 22 onto the reference plane. In other words, the area of ​​the cross section of the first connecting portion 21 perpendicular to the predetermined direction L is smaller than the area of ​​the cross section of the second connecting portion 22 perpendicular to the predetermined direction L.

[0042] Furthermore, the electrical connector 2 also includes a separator 4, which is connected to the first connecting portion 21 on the side opposite to the second connecting portion 22 in a predetermined direction L. The separator 4 is located inside the first mounting hole 35 and divides the surface of the first connecting portion 21 opposite to the second connecting portion 22 into two parts. At least one of the two parts located on both sides of the separator 4 can be connected to the tab 92, which allows the electrical connector 2 to be connected to two tabs 92 of the same polarity in the two pole groups 9 or only one part to one tab 92.

[0043] Preferably, the separator 4, the first connecting part 21, and the second connecting part 22 are integrally formed.

[0044] Optionally, the electrode assembly 9 includes two tabs 92, one of which is a positive tab and the other is a negative tab. There are two mounting ports, two pole posts 3, and two electrical connectors 2. The two mounting ports are located on the same side of the housing 8 in a predetermined direction L, and the two pole posts 3 are respectively disposed on the two mounting ports. The two pole posts 3 correspond to the two electrical connectors 2, and the electrical connectors 2 are fixed to the pole posts 3 corresponding to the electrical connectors 2. The two tabs 92 in the electrode assembly 9 are respectively connected to the two pole posts 3.

[0045] Optionally, the cover can be applied to a battery having two electrode groups 9. Specifically, the two electrode groups 9 include two positive tabs 92, which are connected to the same first connecting part 21 and are located on both sides of the separator 4. The two negative tabs 92 are connected to another first connecting part 21 and are also located on both sides of the separator 4. Optionally, the cover can also be applied to a battery having only one electrode group 9. In this case, the separator 4 may not be provided in the electrical connector 2.

[0046] In the embodiments of this application, as shown in FIG2, the cover plate further includes a welding component 6 and a plastic component 7. The welding component 6 and the plastic component 7 are respectively disposed on both sides of the plate body 1 in a predetermined direction L. The pole post 3 and the welding component 6 can be fixed by laser welding.

[0047] As shown in Figures 2 and 3, the electrode post 3 includes a first conductive part 31, a second conductive part 32, a third conductive part 33, and a fourth conductive part 34 connected in sequence. Part of the first conductive part 31 is connected to the welding part 6, and another part of the first conductive part 31 is located inside the mounting opening. Part of the second conductive part 32 is located inside the mounting opening, and another part is located on the side where the plastic part 7 is located. Both the third conductive part 33 and the fourth conductive part 34 are located on the side where the plastic part 7 is located. A plane perpendicular to a predetermined direction L is defined as the reference plane. The orthographic projection of the first conductive part 31 along the predetermined direction L onto the reference plane lies inside the projection of the second conductive part 32 along the predetermined direction L onto the reference plane. The projection of the second conductive part 32 along the predetermined direction L onto the reference plane lies inside the projection of the third conductive part 33 onto the reference plane. The orthographic projection of the third conductive part 33 onto the reference plane coincides with the orthographic projection of the fourth conductive part 34 onto the reference plane. In other words, the entire electrode post 3 has a stepped structure. Compared to an electrode post 3 that includes a base plate and an electrode post 3 body, the electrode post 3 of this application can be formed in one step, reducing the processing cost of the electrode post 3.

[0048] As shown in Figures 2, 3, and 4, the welding block has a first fixing hole 61 and a second fixing hole 62. One end of the first fixing hole 61 in the predetermined direction L is connected to the second fixing hole 62. The diameter of the first fixing hole 61 is larger than the diameter of the second fixing hole 62. The first conductive part 31 includes a fixing section 311 and a riveting section 312. Part of the fixing section 311 fits against the hole wall of the first fixing hole 61, and the riveting section 312 fits against the hole wall of the second fixing hole 62, thereby fixing the pole post 3 through the welding part 6.

[0049] Optionally, the welded part 6 is also provided with a connecting hole 63, which is connected to the end of the second fixing hole 62 opposite to the first fixing hole 61. The first fixing hole 61, the second fixing hole 62 and the connecting hole 63 all pass through the welded block.

[0050] Preferably, the minimum distance d1 between the wall of the first fixing hole 61 and the wall of the second fixing hole 62 is greater than or equal to 0.3 mm to ensure the connection strength between the welded part 6 and the pole post 3. The minimum distance d1 between the wall of the first fixing hole 61 and the wall of the second fixing hole 62 can be 0.3 mm, 0.4 mm, etc.

[0051] Optionally, the shapes of the first fixing hole 61 and the second fixing hole 62 are adapted to the shape of the first conductive part 31. When both the first fixing hole 61 and the second fixing hole 62 are circular holes, both the fixing section 311 and the riveting section 312 are cylindrical. The minimum distance d1 between the hole wall of the first fixing hole 61 and the hole wall of the second fixing hole 62 is equal to the radius of the first fixing hole 61 and the radius of the second fixing hole 62. When both the first fixing hole 61 and the second fixing hole 62 are square holes, both the fixing section 311 and the riveting section 312 are quadrangular prisms. The hole wall of the first fixing hole 61 is divided into four first mounting portions S1, and the hole wall of the second fixing hole 62 is divided into four second mounting portions S2. The four first mounting portions S1 and the four second mounting portions S2 correspond one-to-one, and the corresponding first mounting portions S1 and second mounting portions S2 are parallel. The minimum distance d1 between the hole wall of the first fixing hole 61 and the hole wall of the second fixing hole 62 is equal to the distance between the corresponding first mounting portion S1 and the second mounting portion S2.

[0052] Optionally, the second conductive part 32, the third conductive part 33, and the fourth conductive part 34 are all in the shape of a quadrangular prism. Before the pole post 3 is installed with the welding part 6, the first conductive part 31 is in the shape of a quadrangular prism. After the pole post 3 is installed, part of the first conductive part 31 fits against the inner wall of the second fixing hole 62. There is a gap between the first conductive part 31 and the hole wall of the second fixing hole 62. Then the pole post 3 is riveted so that part of the first conductive part 31 fits against the hole wall of the second fixing hole 62, thereby realizing the fixation between the pole post 3 and the welding part 6. The part of the first conductive part 31 that fits against the hole wall of the second fixing hole 62 is the riveting section 312, and the rest is the fixing section 311.

[0053] As shown in Figures 2 and 3, the pole post 3 is also provided with a second mounting hole 36. The first mounting hole 35 and the second mounting hole 36 are connected on the side opposite to the receiving space in a predetermined direction L. The first mounting hole 35 passes through the first conductive part 31, the second conductive part 32 and the third conductive part 33. The second mounting hole 36 passes through the fourth conductive part 34. Both the first mounting hole 35 and the second mounting hole 36 are square holes. The diameter of the second mounting hole 36 is larger than that of the second mounting hole 36. The second connecting part 22 is disposed in the second mounting hole 36 and welded to the hole wall of the second mounting hole 36, thereby realizing the fixation between the pole post 3 and the electrical connector 2.

[0054] Optionally, both the first connecting portion 21 and the second connecting portion 22 are cuboid in shape. The projection of the first connecting portion 21 along the predetermined direction L onto the reference plane is located inside the projection of the second connecting portion 22 onto the reference plane. That is, the area of ​​the cross-section of the first connecting portion 21 perpendicular to the predetermined direction L is smaller than the area of ​​the cross-section of the second connecting portion 22 perpendicular to the predetermined direction L.

[0055] As shown in Figure 2, the plastic component 7 includes a support plate 71 and a surrounding plate 72. The support plate 71 is attached to the plate body 1, and the surrounding plate 72 surrounds the support plate 71. The support plate 71 has a connection port that communicates with the mounting port. A portion of the second conductive part 32 is located within the connection port. The side of the third conductive part 33 facing the second conductive part 32 abuts against the support plate 71, and the outer side wall of the third conductive part 33 is attached to the surrounding plate 72. A portion of the outer side wall of the fourth conductive part 34 is attached to the surrounding plate 72. Thus, by providing the plastic component 7, insulation between the electrode post 3 and the housing 8 can be achieved.

[0056] In addition, the cover plate also includes a sealing ring 5, which includes a first sealing part 51 and a second sealing part 52. The first sealing part can be a hollow structure in the shape of a cuboid. The first sealing part 51 includes a first sealing surface and a second sealing surface that are opposite to each other in a predetermined direction L. The first sealing surface is in contact with the welded part 6, a portion of the second sealing surface is in contact with the second conductive part 32, and another portion of the second sealing surface is in contact with the inner wall of the housing 8, thereby achieving a seal between the welded part 6 and the housing 8, and between the welded part 6 and the pole post 3. The second sealing part 52 can be a hollow structure in the shape of a cuboid. The second sealing part 52 is connected to the second sealing surface and is located between the inner wall of the mounting port and the second conductive part 32, thereby achieving a seal between the pole post 3 and the housing 8.

[0057] According to another aspect of this application, a battery is provided, as shown in Figures 5, 6, 7 and 8. The battery includes a housing 8 and the aforementioned cover plate. The housing 8 has an opening, and the cover plate covers the opening and is welded to the housing 8.

[0058] As shown in Figures 7 and 8, the battery also includes an electrode assembly 9, which includes an electrode assembly body 91 and a tab 92. The tab 92 extends from the electrode assembly body 91 and includes a fitting portion 921 and an extension portion 922. The first end of the extension portion 922 is connected to the electrode assembly 9, and the second end of the extension portion 922 is connected to the fitting portion 921. A portion of the extension portion 922 is located in the first mounting hole 35. The fitting portion 921 is welded to the first connecting portion 21, thereby realizing the connection between the tab 92 and the electrical connector 2.

[0059] As shown in Figure 8, the distance d2 between the fitting part 921 and the separator 4 is greater than or equal to 0 mm and less than or equal to 1.0 mm, i.e., 0 mm < d2 ≤ 1.0 mm. This prevents interference between the separator 4 and the tab 92, thus avoiding damage to the tab 92 by the separator 4. The distance d2 between the fitting part 921 and the separator 4 can be 0.5 mm, 0.6 mm, 0.7 mm, etc.

[0060] Furthermore, the extension 922 is bent within the first mounting hole 35. The minimum distance d3 between the extension 922 and the wall of the first mounting hole 35 is greater than or equal to 0.8 mm and less than or equal to 2.0 mm, i.e., 0.8 mm ≤ d3 ≤ 2.0 mm. This prevents interference between the wall of the first fixing hole 61 and the electrode assembly 9, thus avoiding damage to the electrode tab 92. The minimum distance d3 between the extension 922 and the wall of the first mounting hole 35 can be 0.8 mm, 0.85 mm, 0.9 mm, etc.

[0061] Optionally, the extension 922 can be divided into a first extension segment 9221, a first bending segment 9222, a second extension segment 9223, and a second bending segment 9224 connected in sequence. The first extension segment 9221 is connected to the pole assembly body 91, and the second bending segment 9224 is connected to the fitting portion 921. The first bending segment 9222 bends toward the separator 4, and the second bending segment 9224 bends toward the wall of the first fixing hole 61. The distance between the farthest end of the second bending segment 9224 from the separator 4 and the wall of the first fixing hole 61 is the minimum distance d3 between the extension 922 and the wall of the first mounting hole 35.

[0062] Furthermore, the distance between the end face of the pole post 3 facing away from the pole group 9 in the predetermined direction L and the first end of the extension 922 is a first distance d5, and the length of the extension 922 is a second distance d6 (the length of the extension 922 is the dimension of the extension 922 in the predetermined direction L when the pole tab is in the unbent state shown in Figure 9). The difference d4 between the second distance d6 and the first distance d5 is greater than or equal to 3mm, that is, 3mm≤d4≤8mm. In other words, as shown in Figure 9, when the extension 922 is not bent, the distance d4 between the first end of the extension 922 (the upper end of the extension 922) and the end face of the pole post 3 facing away from the pole group 9 in the predetermined direction L (the upper end face of the pole post 3) is greater than or equal to 3mm and less than or equal to 8mm. This can meet the space required for the welding equipment to weld the pole tab 92 and the electrical connector 2, and ensure the welding performance between the pole tab 92 and the electrical connector 2. After welding, the electrical connector 2 can be moved and the electrical connector 2 and the pole 3 can be welded together, thereby completing the assembly between the electrical connector 2 and the pole 3.

[0063] Optionally, the difference d4 between the second distance d6 and the first distance d5 can be 3mm, 4mm, etc.

[0064] 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 pole and an electrical connector. The pole has a first mounting hole that extends in a predetermined direction. The electrical connector includes a first connecting part and a second connecting part. The first connecting part is disposed in the first mounting hole and connected to the hole wall of the first mounting hole. The second connecting part is located outside the first mounting hole and connected to the pole. The first connecting part is used to connect to a tab.

2. The cover plate according to claim 1, characterized in that, The electrical connector further includes a separator, which is connected to the side of the first connecting portion opposite to the second connecting portion in the predetermined direction. The separator is located within the first mounting hole, and at least one portion of the two parts of the first connecting portion located on both sides of the separator is connected to the electrode tab.

3. The cover plate according to claim 2, characterized in that, A plane perpendicular to the predetermined direction is defined as a projection plane. The orthographic projection of the first connecting part on the projection plane is located inside the orthographic projection of the second connecting part on the projection plane. The pole post is also provided with a second mounting hole, which communicates with the first mounting hole. The diameter of the second mounting hole is larger than that of the first mounting hole. The second connecting part is disposed in the second mounting hole and is connected to the hole wall of the second mounting hole.

4. The cover plate according to claim 2, characterized in that, The cover plate also includes a welded component and a plate body. The plate body has an installation opening that extends through the plate body in a predetermined direction. The pole is disposed on the installation opening. The welded component and the electrical connector are respectively disposed on both sides of the plate body in the predetermined direction. The pole is connected to the welded component.

5. The cover plate according to claim 4, characterized in that, The welded component has a first fixing hole and a second fixing hole. The first fixing hole and the second fixing hole are connected to the side of the plate body opposite to the predetermined direction. The diameter of the first fixing hole is larger than the diameter of the second fixing hole. The pole is in contact with the hole wall of the first fixing hole and the hole wall of the second fixing hole respectively. The minimum distance between the hole wall of the first fixing hole and the hole wall of the second fixing hole is greater than or equal to 0.3mm.

6. A battery, characterized in that, The battery includes a housing and a cover plate according to any one of claims 2-5, the housing having an opening and the cover plate covering the opening.

7. The battery according to claim 6, characterized in that, The battery also includes an electrode assembly, which includes an electrode assembly body and a tab. The tab extends from the electrode assembly body and includes a fitting portion and an extension portion. A first end of the extension portion is connected to the electrode assembly, and a second end of the extension portion is connected to the fitting portion. A portion of the extension portion is located within the first mounting hole, and the fitting portion is connected to the first connecting portion.

8. The battery according to claim 7, characterized in that, The extension is bent within the first mounting hole, and the minimum distance between the extension and the wall of the first mounting hole is greater than or equal to 0.8 mm and less than or equal to 2.0 mm.

9. The battery according to claim 7, characterized in that, The distance between the fitting part and the separator is greater than 0 mm and less than or equal to 1.0 mm.

10. The battery according to claim 7, characterized in that, The distance between the end face of the pole facing away from the pole group in the predetermined direction and the first end of the extension is a first distance, the length of the extension is a second distance, and the difference between the second distance and the first distance is greater than or equal to 3 mm and less than or equal to 8 mm.

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