Cover plate assembly and battery

Abstract

The utility model provides a cover plate assembly and a battery, and relates to the technical field of batteries. The cover plate assembly comprises a cover plate body, an upper plastic part, a connecting part, a buffer pad and a pole, the upper plastic part is attached to one side of the cover plate body, the pole penetrates through the cover plate body, the buffer pad is arranged between the connecting part and the upper plastic part, the connecting part is connected with the pole, and the buffer pad can elastically deform. In the assembling process of the cover plate assembly, the connecting piece applies force to the upper plastic piece through the buffer pad, and in the force applying process of the connecting piece, the buffer pad can generate elastic deformation, so that part of pressure is absorbed, the force borne by the upper plastic piece is reduced, and the risk of cracking of the upper plastic piece is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cover plate assembly and a battery. Background Art

[0002] As lithium-ion battery technology becomes increasingly mature, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields.

[0003] The cover of a lithium-ion battery generally includes a cover body, an upper plastic part, a connector and a pole. The cover body and the upper plastic part are provided with pole holes. When the cover assembly is assembled, plastic is stacked on the cover body, and the pole passes through the pole holes on the cover body and the upper plastic part and is connected to the connector by riveting. However, during riveting, the connector exerts a large force on the upper plastic part, which increases the risk of cracking of the upper plastic part. Utility Model Content

[0004] In view of this, the present application provides a cover plate assembly and a battery to solve the problem that during the assembly process of the existing cover plate assembly, the connecting member applies a large force to the upper plastic part, which increases the risk of cracking of the upper plastic part.

[0005] According to one aspect of the present application, a cover plate assembly is provided, which includes a cover plate body, an upper plastic part, a connecting part, a buffer pad and a pole, wherein the upper plastic part is fitted with one side of the cover plate body, the pole passes through the cover plate body, the buffer pad is arranged between the connecting part and the upper plastic part, the connecting part is connected to the pole, and the buffer pad can undergo elastic deformation.

[0006] Preferably, the buffer pad is provided with a through hole, the pole passes through the through hole, and the distance between the hole wall of the through hole and the pole is greater than or equal to 0.3 mm and less than or equal to 2 mm.

[0007] Preferably, the upper plastic part comprises a bottom plate and a surrounding plate connected to each other, the bottom plate and the surrounding plate enclose a receiving cavity, and at least a part of the buffer pad and the connecting member are located in the receiving cavity;

[0008] One side of the bottom plate is in contact with the cover plate body, and the other side of the bottom plate is in contact with the buffer pad. The distance between the buffer pad and the surface of the enclosure facing the accommodating cavity is greater than or equal to 0.3 mm and less than or equal to 2 mm.

[0009] Preferably, the thickness of the buffer pad is 0.1 mm-0.3 mm.

[0010] Preferably, the buffer pad comprises a plurality of through holes, the plurality of through holes are arranged at intervals, and any of the through holes passes through the buffer pad.

[0011] Preferably, the connecting member comprises a first accommodating hole and a second accommodating hole, the first accommodating hole is in communication with the second accommodating hole, and the first accommodating hole is located on a side of the second accommodating hole facing the cover plate body;

[0012] The pole includes a first connecting portion and a second connecting portion, wherein the orthographic projection of the second connecting portion on the cover body is located inside the orthographic projection of the first connecting portion on the cover body, the first connecting portion is in contact with the hole wall of the first accommodating hole, and the second connecting portion is in contact with the hole wall of the second accommodating hole.

[0013] Preferably, the cover plate assembly further includes a lower plastic part, and the pole further includes an abutting portion and a connecting portion, the abutting portion is connected to the second connecting portion via the connecting portion, and the abutting portion abuts against a side of the lower plastic part facing away from the cover plate body.

[0014] Preferably, the lower plastic part includes a main body and a limiting portion, the limiting portion is connected to a side of the main body facing away from the cover body, the limiting portion and the main body enclose a limiting cavity, and the abutting portion is located in the limiting cavity.

[0015] Preferably, the cover plate assembly further comprises a sealing ring, and the sealing ring is sleeved on the pole;

[0016] The cover plate body is provided with a mounting hole, the sealing ring passes through the mounting hole, and the sealing ring is in contact with the hole wall of the mounting hole.

[0017] According to another aspect of the present application, a battery is provided, the battery comprising the above-mentioned cap plate assembly.

[0018] During the assembly of the cover assembly of the present application, the connecting member applies force to the upper plastic member through the buffer pad. During the process of the connecting member applying force, the buffer pad can undergo elastic deformation, thereby absorbing part of the pressure, reducing the force on the upper plastic member and reducing the risk of cracking of the upper plastic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 An exploded view showing a cover plate assembly according to an embodiment of the present invention;

[0021] Figure 2A schematic diagram showing the planar structure of a cover plate assembly according to an embodiment of the utility model;

[0022] Figure 3 Show Figure 2 A cross-sectional view of the cover plate assembly obtained by cutting along A-A';

[0023] Figure 4 Show Figure 3 A magnified view of part B;

[0024] Figure 5 A partial structural schematic diagram showing a cover plate assembly according to an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of the buffer pad is shown;

[0026] Figure 7 A schematic diagram of the structure of the pole is shown.

[0027] Icons: 1-cover body; 11-mounting hole; 2-upper plastic part; 21-bottom plate; 211-extension hole; 22-enclosure; 3-connector; 4-pole; 41-first connecting part; 42-second connecting part; 43-connecting part; 44-abutting part; 5-buffer pad; 51-through hole; 52-through hole; 6-lower plastic part; 61-main body; 62-limiting part; 7-sealing ring. DETAILED DESCRIPTION

[0028] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0029] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0030] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0031] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0032] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0033] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the 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 relational terms used herein will be interpreted accordingly.

[0034] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0035] Variations in the shapes shown in the 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 drawings but include variations in shapes that occur during manufacturing.

[0036] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0037] According to one aspect of the present application, a cover plate assembly is provided, such as Figures 1 to 5 As shown, the cover assembly includes a cover body 1, an upper plastic part 2, a connector 3, a buffer pad 5 and a pole 4. The upper plastic part 2 is fitted with one side of the cover body 1, and the pole 4 passes through the cover body 1. The buffer pad 5 is arranged between the connector 3 and the upper plastic part 2. The connector 3 is connected to the pole 4, and the buffer pad 5 can be elastically deformed. During the assembly of the cover assembly, the connector 3 applies force to the upper plastic part 2 through the buffer pad 5. During the process of the connector 3 applying force, the buffer pad 5 can be elastically deformed, thereby absorbing part of the pressure, reducing the force on the upper plastic part 2, and reducing the risk of cracking of the upper plastic part 2.

[0038] In addition, the buffer pad 5 is made of insulating material, which can ensure the insulation effect between the cover plate and the pole 4. Optionally, the buffer pad 5 can be made of deformable insulating materials such as EPDM rubber, silicone, polyurethane, etc.

[0039] Furthermore, if Figure 1 , Figure 3 , Figure 4 and Figure 6 As shown, the buffer pad 5 is provided with a through hole 51, and the pole 4 passes through the through hole 51. The distance between the hole wall of the through hole 51 and the pole 4 is greater than or equal to 0.3 mm and less than or equal to 2 mm. In this way, the through hole 51 of the buffer pad 5 reserves an assembly gap for the pole 4, which can facilitate the pole 4 to pass through the through hole 51. Optionally, the distance between the hole wall of the through hole 51 and the pole 4 can be 0.3 mm, 0.5 mm, 0.7 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm or 2 mm, etc.

[0040] It should be noted that the shape of the through hole 51 can be selected based on the shape of the pole 4. For example, when the cross section of the pole 4 is circular, the through hole 51 is a circular hole. At this time, the radius of the through hole 51 is greater than the radius of the portion of the pole 4 corresponding to the through hole 51 (i.e., the second connecting portion 42 described below), and the difference between the radius of the through hole 51 and the radius of the portion of the pole 4 corresponding to the through hole 51 is 0.3mm-2mm. For another example, when the cross section of the pole 4 is rectangular, the through hole 51 is a rectangular hole, and the distance between the side of the portion of the pole 4 corresponding to the through hole 51 and the hole wall of the through hole 51 is 0.3mm-2mm.

[0041] In the embodiments of the present application, Figure 1 , Figure 4 and Figure 5 As shown, the upper plastic part 2 includes a bottom plate 21 and a surrounding plate 22 connected to each other, the surrounding plate 22 is arranged around the edge of the bottom plate 21, and the bottom plate 21 and the surrounding plate 22 enclose a receiving cavity. The buffer pad 5 and at least part of the connector 3 are located in the receiving cavity, one side of the bottom plate 21 is in contact with the cover body 1, and the other side of the bottom plate 21 is in contact with the buffer pad 5. The connector 3 is connected to the pole 4, so as to achieve the fixation of the upper plastic part 2. The upper plastic part 2 and the connector 3 can be used to surround the side of the pole 4 to achieve insulation of the pole 4.

[0042] Furthermore, an extension hole 211 is formed on the bottom plate 21, and the extension hole 211 penetrates the bottom plate 21. The pole 4 passes through the extension hole 211 to be connected with the connector 3. Optionally, the bottom plate 21 and the enclosure 22 may be integrally injection molded.

[0043] In addition, the distance between the buffer pad 5 and the surface of the enclosure 22 facing the accommodating cavity is greater than or equal to 0.3 mm and less than or equal to 2 mm. In this way, the upper plastic part 2 reserves an assembly gap for the installation of the buffer pad 5, which can facilitate the placement of the buffer pad 5 in the upper plastic part 2. Optionally, the distance between the buffer pad 5 and the surface of the enclosure 22 facing the accommodating cavity can be 0.3 mm, 0.4 mm, 0.8 mm, 1 mm, 1.2 mm, 1.5 mm, 1.7 mm or 2 mm, etc.

[0044] It should be noted that the shapes of the upper plastic part 2, the connecting part 3 and the buffer pad 5 are compatible. For example, when the connecting part 3 is in a rectangular shape, the bottom plate 21 of the upper plastic part 2 is a rectangular plate. At this time, the upper plastic part 2 encloses a rectangular accommodating cavity, the buffer pad 5 is a rectangular gasket, and the distance between the edge of the buffer pad 5 and the inner surface of the enclosure 22 is 0.1mm-2mm; for another example, when the connecting part 3 is cylindrical, the bottom plate 21 is a circular plate. At this time, the upper plastic part 2 encloses a cylindrical accommodating cavity, the buffer pad 5 is a circular gasket, and the radius of the bottom plate 21 of the upper plastic part 2 is greater than the radius of the buffer pad 5, and the difference between the radius of the bottom plate 21 and the radius of the buffer pad 5 is 0.1mm-2mm.

[0045] In the embodiments of the present application, Figure 6 As shown, the cushion pad 5 may include a plurality of through holes 52, which are arranged at intervals, and any through hole 52 passes through the cushion pad 5. The through holes 52 can provide deformation space for other parts of the cushion pad 5 to ensure the cushioning effect of the cushion pad 5.

[0046] Optionally, the shape of the through hole 52 on the buffer pad 5 can be selected according to demand. For example, the buffer pad 5 can be a grid-like structure, in which case the through hole 52 is a diamond-shaped hole; for another example, the through hole 52 can also be a circular hole, with multiple circular holes arranged at intervals; for another example, the through hole 52 can also be a rectangular hole, with multiple rectangular holes arranged at intervals.

[0047] Further, the thickness of the buffer pad 5 is 0.1 mm-0.3 mm to ensure the buffering effect of the buffer pad 5. Optionally, the thickness of the buffer pad 5 can be 0.1 mm, 0.13 mm, 0.15 mm, 0.18 mm, 0.20 mm, 0.25 mm or 0.3 mm.

[0048] In the embodiments of the present application, Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, the cover body 1 may be provided with a mounting hole 11, and the connector 3 includes a first receiving hole and a second receiving hole, the first receiving hole is located on the side of the second receiving hole facing the cover body 1, and the first receiving hole, the second receiving hole, the through hole 51, the extension hole 211 and the mounting hole 11 are connected; the first receiving hole and the second receiving hole are respectively used to accommodate different parts of the pole 4. The pole 4 includes a first connecting portion 41 and a second connecting portion 42, and the orthographic projection of the second connecting portion 42 on the cover body 1 is located inside the orthographic projection of the first connecting portion 41 on the cover body 1, that is, the cross-sectional area of ​​the first connecting portion 41 is greater than the cross-sectional area of ​​the second connecting portion 42. After the connector 3 is riveted to the pole 4, the first connecting portion 41 fits with the hole wall of the first receiving hole, and the second connecting portion 42 fits with the hole wall of the second receiving hole.

[0049] Further, the pole 4 further includes a connecting portion 43 and an abutting portion 44, the abutting portion 44 is connected to the second connecting portion 42 through the connecting portion 43, the orthographic projection of the second connecting portion 42 on the cover body 1 is located inside the orthographic projection of the connecting portion 43 on the cover body 1, and the orthographic projection of the first connecting portion 41 on the cover body 1 is located inside the orthographic projection of the connecting portion 43 on the cover body 1, that is, the cross-sectional area of ​​the connecting portion 43 is larger than the cross-sectional area of ​​the first connecting portion 41, and the cross-sectional area of ​​the connecting portion 43 is larger than the cross-sectional area of ​​the second connecting portion 42. The orthographic projection of the connecting portion 43 on the cover body 1 is located inside the orthographic projection of the abutting portion 44 on the cover body 1, that is, the cross-sectional area of ​​the abutting portion 44 is larger than the cross-sectional area of ​​the connecting portion 43.

[0050] Optionally, the connecting portion 43, the first connecting portion 41 and the second connecting portion 42 can all be cylindrical, the abutting portion 44 can be rectangular, the diameter of the second connecting portion 42 is smaller than the diameter of the first connecting portion 41, and the diameter of the second connecting portion 42 is smaller than the diameter of the first connecting portion 41. In this case, the first accommodating hole, the second accommodating hole, the through hole 51, the extension hole 211 and the mounting hole 11 are all circular holes.

[0051] It should be noted that the shapes of the connecting portion 43, the first connecting portion 41, the second connecting portion 42 and the abutting portion 44 are not limited to the above-mentioned shapes. For example, the connecting portion 43, the first connecting portion 41, the second connecting portion 42 and the abutting portion 44 can all be cylindrical. In this case, the first accommodating hole, the second accommodating hole, the through hole 51, the extension hole 211 and the mounting hole 11 are all circular holes. For another example, the connecting portion 43, the first connecting portion 41, the second connecting portion 42 and the abutting portion 44 can all be rectangular. In this case, the first accommodating hole, the second accommodating hole, the through hole 51, the extension hole 211 and the mounting hole 11 are all rectangular holes.

[0052] Furthermore, if Figure 1 and Figure 4 As shown, the cover assembly also includes a lower plastic part 6, and the abutment portion 44 abuts against the side of the lower plastic part 6 facing away from the cover body 1, and is connected to the pole 4 through the connecting member 3, thereby realizing the connection between the lower plastic part 6, the cover body 1 and the upper plastic part 2.

[0053] Optionally, the lower plastic part 6 includes a main body 61 and a limiting portion 62, the main body 61 is in the shape of a plate, the limiting portion 62 is connected to the side of the main body 61 facing away from the cover body 1, and the limiting portion 62 is connected end to end, so that the limiting portion 62 and the main body 61 surround a limiting cavity, and the abutting portion 44 is located in the limiting cavity, thereby achieving fixation between the pole 4 and the cover body 1.

[0054] In addition, the cover body 1 can be a plain aluminum plate, and the cover assembly also includes a sealing ring 7, which is sleeved on the pole 4; the sealing ring 7 passes through the mounting hole 11, and the sealing ring 7 fits with the hole wall of the mounting hole 11, thereby achieving insulation between the pole 4 and the cover body 1.

[0055] The upper plastic part 2 of the present application is provided with a buffer pad 5. When the connector 3 is installed, the buffer pad 5 can undergo elastic deformation to absorb part of the force, thereby reducing the force received by the upper plastic part 2 and reducing the risk of cracking of the upper plastic part 2.

[0056] According to another aspect of the present application, a battery is provided, the battery comprising the above-mentioned cover plate assembly, the battery having the same technical effects as the above-mentioned battery, which will not be described in detail here.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A cover plate assembly, characterized in that: The cover assembly includes a cover body, an upper plastic part, a connecting part, a buffer pad and a pole, the upper plastic part is fitted with one side of the cover body, the pole passes through the cover body, the buffer pad is arranged between the connecting part and the upper plastic part, the connecting part is connected to the pole, and the buffer pad can undergo elastic deformation.

2. The cover plate assembly according to claim 1, characterized in that: The buffer pad is provided with a through hole, the pole passes through the through hole, and the distance between the hole wall of the through hole and the pole is greater than or equal to 0.3 mm and less than or equal to 2 mm.

3. The cover plate assembly according to claim 1, characterized in that: The upper plastic part comprises a bottom plate and a surrounding plate connected to each other, wherein the bottom plate and the surrounding plate surround a receiving cavity, and at least a portion of the buffer pad and the connecting member are located in the receiving cavity; And / or, one side of the bottom plate is in contact with the cover plate body, and the other side of the bottom plate is in contact with the buffer pad, and the distance between the buffer pad and the surface of the enclosure facing the accommodating cavity is greater than or equal to 0.3 mm and less than or equal to 2 mm.

4. The cover plate assembly according to claim 1, characterized in that: The thickness of the buffer pad is 0.1mm-0.3mm.

5. The cover plate assembly according to any one of claims 1 to 4, characterized in that: The buffer pad includes a plurality of through holes, the plurality of through holes are arranged at intervals, and any of the through holes penetrates the buffer pad.

6. The cover plate assembly according to claim 1, characterized in that: The connecting member comprises a first receiving hole and a second receiving hole, the first receiving hole is connected to the second receiving hole, and the first receiving hole is located on a side of the second receiving hole facing the cover plate body; The pole includes a first connecting portion and a second connecting portion, wherein the orthographic projection of the second connecting portion on the cover body is located inside the orthographic projection of the first connecting portion on the cover body, the first connecting portion is in contact with the hole wall of the first accommodating hole, and the second connecting portion is in contact with the hole wall of the second accommodating hole.

7. The cover plate assembly according to claim 6, characterized in that: The cover plate assembly further includes a lower plastic part, and the pole further includes an abutting portion and a connecting portion, the abutting portion is connected to the second connecting portion through the connecting portion, and the abutting portion abuts against a side of the lower plastic part facing away from the cover plate body.

8. The cover plate assembly according to claim 7, characterized in that: The lower plastic part includes a main body and a limiting part, the limiting part is connected to a side of the main body facing away from the cover body, the limiting part and the main body surround a limiting cavity, and the abutting part is located in the limiting cavity.

9. The cover plate assembly according to claim 1, characterized in that: The cover plate assembly also includes a sealing ring, which is sleeved on the pole; The cover plate body is provided with a mounting hole, the sealing ring passes through the mounting hole, and the sealing ring is in contact with the hole wall of the mounting hole.

10. A battery, characterized in that: The battery comprises the cap plate assembly according to any one of claims 1 to 9.

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