Top cover assembly and battery

Abstract

The application provides a top cover assembly and a battery, wherein the top cover assembly comprises a top cover, an upper plastic and a thermal insulation piece, the upper plastic is arranged on the top cover, the top cover and the upper plastic both have a first through hole for a pole to pass through, and the thermal insulation piece is arranged between at least part of the upper plastic and the top cover to separate the heat transfer between the upper plastic and the top cover. The application solves the problem of fire and explosion caused by the sealing failure of the top cover after short circuit in the prior art.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a top cover assembly and a battery. Background Technology

[0002] Currently, battery top cover assemblies are typically fixed using an assembly and welding method. The pressure plate and insulating plastic of the top cover assembly are assembled and installed in the mounting groove of the cover plate. Then, the terminals with sealing rings are assembled from bottom to top, passing through the central ring of the pressure plate. At this point, the terminals are fixed, and the pressure plate is pressed down from top to bottom, compressing the sealing ring to form a seal. Finally, the pressure plate and terminals are welded together. In the event of a sudden short circuit in a battery cell with this top cover structure, the high short-circuit current causes the pressure plate temperature to rise. Since the pressure plate is tightly connected to the insulating plastic, the insulating plastic will slowly melt under the high temperature of the pressure plate and will no longer be able to support the pressure plate. The pressure plate and the terminals welded to it will sink. At this time, the sealing ring, which originally performed the sealing function, will change from a compressed state to an uncompressible state, thus failing to provide a seal. This failure of the cell's seal can lead to leakage of electrolyte and high-temperature gases, resulting in a fire and explosion risk. Utility Model Content

[0003] The main objective of this application is to provide a top cover assembly and a battery to solve the problem of fire and explosion caused by sealing failure after a short circuit in the prior art.

[0004] To achieve the above objectives, according to one aspect of this application, a top cover assembly is provided, comprising: a top cover, an upper plastic, and a heat insulation member, wherein the upper plastic is disposed on the top cover, and both the top cover and the upper plastic have a first through hole for an electrode post to pass through; the heat insulation member is disposed between at least a portion of the upper plastic and the top cover to isolate heat transfer between the upper plastic and the top cover.

[0005] Furthermore, there are multiple heat insulation components, with heat insulation components provided between the upper surface of the upper plastic and the top cover, and between the lower surface of the upper plastic and the top cover.

[0006] Instruction manual PN311476HZYWDL

[0007] Furthermore, the upper plastic includes a first section, a second section, and a third section that are bent and connected in sequence. The first section and the third section both extend along the axial direction of the first through hole. The first section forms the inner wall of the first through hole, and the second section extends along the surface of the top cover. The upper and lower surfaces of the second section are the upper and lower surfaces of the upper plastic.

[0008] Furthermore, the top cover includes a cover plate and a pressure plate. The pressure plate presses against the heat insulation component and presses the upper plastic onto the cover plate. Heat insulation components are provided between the upper plastic and the upper surface of the cover plate, and between the upper plastic and the lower surface of the pressure plate.

[0009] Furthermore, the cover plate has a recess, at least a portion of the upper plastic is located within the recess, and a heat insulation element between the upper plastic and the cover plate is located within the recess.

[0010] Furthermore, the projection of the heat insulation element onto the upper surface of the upper plastic is greater than or equal to the range of the upper surface of the upper plastic; and / or the projection of the heat insulation element onto the lower surface of the upper plastic is greater than or equal to the range of the lower surface of the upper plastic.

[0011] Furthermore, the top cover assembly also includes a lower plastic and a sealing ring. The lower plastic is located below the top cover and has a second through hole that connects with the first through hole. The sealing ring is located on the inner wall of the second through hole and abuts against the top cover.

[0012] Furthermore, the diameter of the second through hole is larger than the diameter of the first through hole, and the sealing ring abuts against the lower surface at the edge of the first through hole.

[0013] Furthermore, the thermal insulation component is at least one of glass or ceramic.

[0014] According to another aspect of this application, a battery is provided, including the top cover assembly described above.

[0015] By applying the technical solution of this application, a heat insulation component is installed between the upper plastic and the top cover, thereby forming a highly efficient thermal isolation barrier between the upper plastic and the top cover. This effectively blocks heat transfer, preventing the high temperature generated during a short circuit from being conducted upwards to the upper plastic, preventing the upper plastic from melting due to high temperature, and thus avoiding the downward displacement of the terminal post and the failure of the sealing ring. This greatly reduces the risk of fire or explosion caused by battery thermal runaway. Specifically, when the battery short-circuits, the terminal post (PN311476HZYWDL) and the top cover, being metal parts, are prone to rapid heating, which is then transferred to the upper plastic, causing it to melt. After the upper plastic melts, the terminal post is prone to downward displacement, resulting in the failure of the sealing ring and potentially leading to battery fire or explosion. The heat insulation component blocks the heat transfer from the top cover to the upper plastic, so that even under the extreme conditions of a short circuit, the upper plastic can still maintain its supporting function, thus ensuring the effectiveness of the sealing ring and improving battery safety. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 An exploded view of the top cover assembly of this application is shown;

[0018] Figure 2 A cross-sectional view of the top cover assembly of this application is shown;

[0019] Figure 3 It shows Figure 2 Enlarged view of point A in the middle.

[0020] The above figures include the following reference numerals:

[0021] 10. Top cover; 11. Cover plate; 111. Recess; 112. Explosion-proof hole; 12. Pressure plate; 20. Upper plastic; 21. First section; 211. First through hole; 22. Second section; 23. Third section; 30. Heat insulation component; 40. Lower plastic; 41. Second through hole; 50. Sealing ring; 60. Explosion-proof valve plate; 70. Pole post. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] Instruction manual PN311476HZYWDL

[0024] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0026] It should be noted that "multiple" in the above embodiments refers to at least two.

[0027] In order to solve the problem of fire and explosion caused by sealing failure after short circuit of the top cover in the prior art, this application provides a top cover assembly and a battery, wherein the battery includes the top cover assembly described below.

[0028] like Figures 1 to 3 The top cover assembly shown includes: a top cover 10, an upper plastic 20, and a heat insulation member 30. The upper plastic 20 is disposed on the top cover 10. Both the top cover 10 and the upper plastic 20 have a first through hole 211 for the pole post 70 to pass through. The heat insulation member 30 is disposed between at least a portion of the upper plastic 20 and the top cover 10 to isolate the heat transfer between the upper plastic 20 and the top cover 10.

[0029] This embodiment creates a highly efficient thermal barrier between the upper plastic 20 and the top cover 10 by providing a heat insulation component 30 between them. This effectively blocks heat transfer, preventing the high temperature generated during a short circuit from being conducted upwards to the upper plastic 20, thus preventing the upper plastic 20 from melting due to high temperature. This avoids the downward displacement of the terminal post 70 and the failure of the sealing ring 50, thereby greatly reducing the risk of fire or explosion caused by thermal runaway of the battery. Specifically, when the battery short-circuits, the terminal post 70 and the top cover 10, being metal parts, can easily and quickly... The heat rises, which is then transferred to the upper plastic 20, causing it to melt. This melting can cause the terminal post 70 to shift downwards, leading to the failure of the sealing ring 50 and potentially causing the battery to catch fire or explode. The heat insulation component 30 blocks the heat transfer from the top cover 10 to the upper plastic 20, ensuring that even under extreme conditions caused by a short circuit, the upper plastic 20 can maintain its supporting function, thus guaranteeing the effectiveness of the sealing ring 50 and improving battery safety.

[0030] It should be noted that when the electrode post 70 heats up due to a short circuit, the heat can be quickly transferred to the top cover 10. Since the surfaces of the top cover 10 and the upper plastic 20 are in direct contact, and the contact area between the upper plastic 20 and the top cover 10 is relatively large, a heat insulation component 30 is installed between the upper plastic 20 and the top cover 10. However, there is a certain assembly gap between the outer periphery of the electrode post 70 and the upper plastic 20, and the area of ​​the upper plastic 20 near the electrode post 70 is small, resulting in less and slower heat transfer. Therefore, the heat causing the upper plastic 20 to melt mainly comes from the top cover 10. Thus, blocking the heat transfer between the upper plastic 20 and the top cover 10 ensures the supporting function of the upper plastic 20. Figure 1 , Figure 3As shown, in this embodiment, there are multiple heat insulation components 30. Heat insulation components 30 are provided between the upper surface of the upper plastic 20 and the top cover 10, and between the lower surface of the upper plastic 20 and the top cover 10, to ensure the heat insulation effect of the heat insulation components 30. Specifically, the heat insulation component 30 in this embodiment is set as a plate-shaped structure, and an assembly hole for the pole post 70 to pass through is provided in the center of the plate-shaped structure. The heat insulation component 30 is simultaneously disposed on the upper and lower surfaces of the upper plastic 20. This allows the heat insulation component 30 to not only block heat from the inside of the battery from melting the upper plastic 20, but also to effectively disperse and absorb locally concentrated heat, forming a uniform thermal resistance distribution. This ensures that even in the event of a local short circuit or overheating, heat will not be concentrated and transferred to the upper plastic 20. For example, when the cell short-circuits, the terminal 70 generates high temperature, and heat can be transferred along the axial direction of the terminal 70, thereby transferring to multiple locations of the top cover assembly. The heat insulation component 30 effectively blocks the path of heat transfer from the top and bottom of the upper plastic 20 to the upper plastic 20, thus ensuring that heat is not transferred to the upper plastic 20. This allows the upper plastic 20 to maintain its structural and performance stability under a wider range of temperature conditions, avoiding the safety risks caused by the melting of the upper plastic 20 and resulting in seal failure.

[0031] In this embodiment, the upper plastic 20 includes a first segment 21, a second segment 22, and a third segment 23 connected by sequential bending. Both the first segment 21 and the third segment 23 extend along the axial direction of the first through hole 211. The first segment 21 forms the inner wall of the first through hole 211, and the second segment 22 extends along the surface of the top cover 10. The upper and lower surfaces of the second segment 22 are the upper and lower surfaces of the upper plastic 20. This creates a stable support structure around the pole post 70, while the planar structure of the second segment 22 supports the heat insulation component 30, ensuring that the heat insulation component 30 does not shift during use and maintaining effective thermal insulation between the upper plastic 20 and the top cover 10. Specifically, in this embodiment, the first segment 21 of the upper plastic 20 is closer to the axis of the pole post 70 than the second segment 22 and the third segment 23, and the second segment 22 is closer to the axis of the pole post 70 than the third segment 23. Furthermore, the first segment 21 and the second segment 22 are perpendicularly arranged, thus forming a Z-shaped structure. This structural form of the upper plastic 20 ensures precise guidance and stable support during the insertion of the pole post 70. The first segment 21, as an insulating functional area, directly forms the inner wall of the first through hole 211, tightly fitting with the pole post 70 to effectively isolate current in the electrical connection and prevent short-circuit risks. The second segment 22, acting as a bridge connecting the first segment 21 and the third segment 23, is also an insulating functional area, providing insulation. Parallel to the extension direction of the top cover 10, the second segment 22 forms a planar contact structure with the heat insulation element 30, providing a wider support area and ensuring the stable positioning of the upper plastic 20 within the top cover assembly, thereby ensuring the effectiveness of the sealing ring 50. Simultaneously, the second segment 22 not only structurally serves as a connection and support but also functionally acts as a crucial interface. By placing heat insulation elements 30 between the upper and lower surfaces of the second segment 22 and the top cover 10, the direct heat transfer path is effectively blocked, protecting the upper plastic 20 from high-temperature damage. The third segment 23 serves as the supporting area for the upper plastic 20. Along the axial direction of the terminal post 70, the third segment 23 has a certain thickness and elasticity, thus providing support for the top cover assembly. Therefore, when the third segment 23 is heated and melts, the components above the second segment 22 will sink, and the components below the second segment 22 will rise. This will cause a change in the compression state of the sealing ring 50 below the second segment 22, resulting in the failure of the sealing ring 50 and the loss of battery sealing. At the same time, the third segment 23 can limit the heat insulation component 30 above the upper plastic 20 to be inside the upper plastic 20, preventing the heat insulation component 30 from moving or misaligning, thereby ensuring the effectiveness of the heat insulation component 30.

[0032] Instruction manual PN311476HZYWDL

[0033] In this embodiment, the top cover 10 includes a cover plate 11 and a pressure plate 12. The pressure plate 12 presses against the heat insulation component 30 and presses the upper plastic 20 onto the cover plate 11. A heat insulation component 30 is provided between the upper plastic 20 and the upper surface of the cover plate 11, and between the upper plastic 20 and the lower surface of the pressure plate 12, thereby achieving reliable heat insulation and fixation of the upper plastic 20. Specifically, in this embodiment, the cover plate 11, the pressure plate 12, and the heat insulation component 30 are all sheet-like. Along the axial direction of the pole post 70, the pressure plate 12, the heat insulation component 30, the upper plastic 20, another heat insulation component 30, and the cover plate 11 are arranged sequentially. The pressure plate 12 is located on the side furthest from the sealing ring 50. After the pressure plate 12 is fixed to the pole post 70, the structure of the top cover assembly is fixed as a whole. The sealing ring 50 is located below the cover plate 11. After the pressure plate 12 presses the cover plate 11, the sealing ring 50 is squeezed and deformed, thereby achieving a sealing effect. This not only enhances the overall stability of the top cover assembly but also improves the sealing effect, effectively preventing electrolyte leakage and the intrusion of external impurities, thereby ensuring the normal operating environment of the battery.

[0034] In this embodiment, the cover plate 11 has a recess 111, at least a portion of the upper plastic 20 is located within the recess 111, and the heat insulation member 30 between the upper plastic 20 and the cover plate 11 is located within the recess 111, thereby achieving reliable fixation of the upper plastic 20 and the heat insulation member 30. Specifically, the cover plate 11 in this embodiment is configured as a rectangular sheet structure, with the recess 111 provided on the side of the cover plate 11 near the heat insulation member 30. The center of the recess 111 has a central hole for accommodating the first segment 21 of the upper plastic 20, and the second segment 22 of the upper plastic 20 is disposed within the recess 111. The heat insulation member 30, near the upper surface of the upper plastic 20, is disposed above the second segment 22 of the upper plastic 20 and is limited to the center of the upper plastic 20 by the third segment 23. In this way, the cover plate 11, the upper plastic 20, and the heat insulation member 30 form a tight and elastic structure, which helps to improve the mechanical strength of the top cover assembly and provides additional cushioning protection when the battery is subjected to external impact, ensuring that the internal components of the battery are not damaged. In this embodiment, the recess 111 is set as a rectangular recess 111 to match the structure of the upper plastic 20 and achieve reliable fixation of the upper plastic 20. Of course, depending on the actual situation, the recess 111 can also be set as other shapes, as long as they can match the outer periphery shape of the upper plastic 20.

[0035] Instruction manual PN311476HZYWDL

[0036] In this embodiment, the projection of the heat insulation component 30 onto the upper surface of the upper plastic 20 is greater than or equal to the range of the upper surface of the upper plastic 20; and / or the projection of the heat insulation component 30 onto the lower surface of the upper plastic 20 is greater than or equal to the range of the lower surface of the upper plastic 20, thereby providing reliable thermal insulation protection for the upper plastic 20. Specifically, in this embodiment, the heat insulation component 30 is directly attached to the upper and lower surfaces of the upper plastic 20, so that the heat carried by the cover plate 11 below the upper plastic 20 and the pressure plate 12 above the upper plastic 20 cannot be transferred to the second section 22 of the upper plastic 20, thereby preventing the second section 22 from melting due to heat and losing its supporting function. In this embodiment, the heat insulation component 30 above the upper plastic 20 is the same size as the upper surface of the upper plastic 20, so that the heat insulation component 30 above the upper plastic 20 can completely cover the upper surface of the upper plastic 20, thereby effectively protecting the second section 22. Similarly, the heat insulation component 30 below the upper plastic 20 is the same size as the lower surface of the upper plastic 20, completely covering the lower surface of the upper plastic 20. In this way, regardless of whether the heat is transferred from the pressure plate 12 or the cover plate 11, the heat insulation component 30 can act as the first line of defense against heat transfer, thereby ensuring that the second section 22 of the upper plastic 20 does not melt, thus ensuring the integrity and functionality of the upper plastic 20, thereby ensuring that the height of the top cover assembly does not change, and thus maintaining the compressed state of the sealing ring 50, ensuring that the battery's sealing performance is not compromised. Of course, the size of the heat insulation component 30 can also be set to be slightly larger than the size of the upper or lower surface of the upper plastic 20, so as to completely cover the upper and lower surfaces of the second section 22 and achieve complete protection for the second section 22.

[0037] In this embodiment, the top cover assembly further includes a lower plastic 40 and a sealing ring 50. The lower plastic 40 is disposed below the top cover 10 and has a second through hole 41 that connects to and communicates with the first through hole 211. The sealing ring 50 is disposed on the inner wall of the second through hole 41 and abuts against the top cover 10, thereby sealing the battery. Specifically, in this embodiment, the lower plastic 40 is configured as a rectangular structure similar to the cover plate 11 and has two second through holes 41, which are respectively used for the passage of the positive terminal 70 and the negative terminal 70. The terminal post 70 has a circumferential boss, and the sealing ring 50 is sleeved on the terminal post 70. The lower surface of the sealing ring 50 abuts against the circumferential boss of the terminal post 70, and the upper surface of the sealing ring 50 abuts against the lower surface of the cover plate 11. When the pressure plate 12 is fixed to the terminal post 70, the pressure plate 12 presses the upper plastic 20 and then presses the cover plate 11, thereby giving the sealing ring 50 pressure from top to bottom, so that the sealing ring 50 is compressed and deformed to form a seal, thereby achieving battery sealing.

[0038] In this embodiment, the diameter of the second through hole 41 is larger than the diameter of the first through hole 211. The sealing ring 50 abuts against the lower surface at the edge of the first through hole 211, thereby ensuring that the sealing ring 50 can fully expand under pressure to fill the gap between the first through hole 211 and the terminal 70, thus forming an effective sealing barrier. Specifically, in this embodiment, the top cover assembly is configured such that the diameter of the first through hole 211 is smaller than the diameter of the central hole of the cover plate 11, and the diameter of the central hole is smaller than the diameter of the second through hole 41. Thus, the first section 21 of the upper plastic 20 is located inside the central hole, and the central hole of the cover plate 11 abuts against the outer peripheral side of the first section 21 of the upper plastic 20. The difference in diameter between the central hole and the second through hole 41 creates an annular accommodating space inside the second through hole 41 with a diameter between the diameters of the central hole and the second through hole 41. The sealing ring 50 is placed in the accommodating space and, under the pressure of the pressure plate 12, abuts against the circumferential boss of the terminal 70 and the lower surface of the cover plate 11 to seal, thereby achieving battery sealing.

[0039] In this embodiment, the top cover assembly also includes an explosion-proof valve plate 60. The top cover 10 has an explosion-proof hole 112, and the explosion-proof valve plate 60 is disposed at the explosion-proof hole 112, thereby automatically opening to release pressure when the internal pressure of the battery abnormally increases, preventing the battery from exploding due to excessive pressure. Specifically, the explosion-proof hole 112 is disposed on the cover plate 11 and is located at the center of the cover plate 11. The explosion-proof hole 112 is configured as an elongated hole to match the shape of the explosion-proof valve plate 60, allowing the explosion-proof valve plate 60 to be placed inside the explosion-proof hole 112. In this way, when the battery is short-circuited or overcharged, the explosion-proof valve plate 60 can respond in time to release excess pressure, preventing the battery from exploding, thereby improving battery safety. Optionally, a protective abutment can be provided above the explosion-proof valve plate 60 to protect the explosion-proof valve plate 60.

[0040] Instruction manual PN311476HZYWDL

[0041] In this embodiment, the heat insulation component 30 is at least one of glass or ceramic, thus providing heat insulation for the upper plastic 20 while also possessing a certain strength. Both glass and ceramic are insulating materials, and the heat insulation component 30 can be either one. In this embodiment, the heat insulation component 30 is made of ceramic. When a short circuit in the battery cell causes the electrode post 70 and the pressure plate 12 to generate high temperatures, the heat insulation component 30 located on the upper surface of the upper plastic 20 can effectively insulate the heat on the pressure plate 12, preventing it from being transferred to the second section 22 of the upper plastic 20. This ensures that the second section 22 can maintain its supporting function and will not melt or deform due to high temperatures, thereby ensuring that the sealing ring 50 will not rebound and cause airtightness failure. At the same time, the heat insulation component 30 located on the lower surface of the upper plastic 20 can effectively insulate the heat on the cover plate 11, preventing it from being transferred to the second section 22 of the upper plastic 20. This ensures that the second section 22 can maintain its supporting function and will not melt or deform due to high temperatures, thereby ensuring that the sealing ring 50 will not rebound and cause airtightness failure. Optionally, the insulation element 30 can be configured as an insulation pad. Of course, depending on the actual situation, the insulation element 30 can also be made of other insulating materials.

[0042] It should be noted that since terminal 70 includes both positive and negative terminal 70, therefore... Figure 1 , Figure 2 As shown, in this embodiment, the cover plate 11, lower plastic 40, etc., are configured with a symmetrical structure. The cover plate 11 has two symmetrical holes for the electrode post 70 to pass through, and the lower plastic 40 also has two symmetrical second through holes 41 for the electrode post 70 to pass through. The upper plastic 20, heat insulation element 30, and sealing ring 50 are symmetrically arranged around the positive electrode post 70 and the negative electrode post 70. Therefore, the top cover assembly of this embodiment includes two upper plastic 20s and four heat insulation elements 30 to ensure effective sealing at both the positive and negative electrode posts 70.

[0043] The assembly process of the top cover assembly in this embodiment is as follows: the cover plate 11 and the explosion-proof valve plate 60 are fixed together by laser welding, and after fixing, they are fixed to the lower plastic 40 by ultrasonic welding and heat fusion. Then, sealing rings 50 are fitted onto the negative and positive terminals 70 respectively. The terminals 70 with sealing rings 50 fitted are then passed through the center hole on the cover plate 11 from bottom to top and fixed with tooling and cover plate 11. Then, the heat insulation component 30 below the upper plastic 20 is installed into the recess on the cover plate 11. The upper plastic 20 is then installed on top of the heat insulation component 30. After that, the heat insulation component 30 above the upper plastic 20 is installed on top of the upper plastic 20. Finally, the pressure plate 12 is installed on top of the heat insulation component 30 above the upper plastic 20. At the same time, the pressure plate 12 and the upper plastic 20 are installed and pressed together to compress and deform the sealing ring 50 to form a seal. Then, the pressure plate 12 and the terminal 70 are fixed together by laser. Finally, a protective patch is attached.

[0044] It should be noted that "multiple" in the above embodiments refers to at least two.

[0045] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0046] 1. This technology solves the problem of fire and explosion caused by sealing failure after a short circuit in the top cover in existing technologies;

[0047] 2. By setting a heat insulation component between the upper plastic and the top cover, a highly efficient thermal isolation barrier is formed between the upper plastic and the top cover, which effectively blocks heat transfer and prevents the high temperature generated during a short circuit from being conducted to the upper plastic, preventing the upper plastic from melting due to high temperature, thereby avoiding the downward movement of the electrode post and the failure of the sealing ring, thus greatly reducing the risk of fire or explosion caused by thermal runaway of the battery.

[0048] 3. The heat insulation component blocks heat transfer from the top cover to the upper plastic, so that even under extreme conditions of short circuit, the upper plastic can still maintain its supporting function, thereby ensuring the effectiveness of the sealing ring and improving battery safety.

[0049] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.

[0050] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless otherwise expressly indicated in the description PN311476HZYWDL, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0051] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0052] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A top cover assembly, characterized in that, include: Top cover (10); Upper plastic (20) is disposed on the top cover (10), and both the top cover (10) and the upper plastic (20) have a first through hole (211) for the pole post (70) to pass through; A heat insulation element (30) is disposed between at least a portion of the upper plastic (20) and the top cover (10) to separate the heat transfer between the upper plastic (20) and the top cover (10).

2. The top cover assembly according to claim 1, characterized in that, There are multiple heat insulation components (30), and the heat insulation components (30) are provided between the upper surface of the upper plastic (20) and the top cover (10) and between the lower surface of the upper plastic (20) and the top cover (10).

3. The top cover assembly according to claim 2, characterized in that, The upper plastic (20) includes a first section (21), a second section (22), and a third section (23) that are sequentially bent and connected. The first segment (21) and the third segment (23) both extend along the axial direction of the first through hole (211). The first segment (21) forms the inner wall of the first through hole (211). The second segment (22) extends along the surface of the top cover (10). The upper and lower surfaces of the second segment (22) are the upper and lower surfaces of the upper plastic (20).

4. The top cover assembly according to claim 2, characterized in that, The top cover (10) includes a cover plate (11) and a pressure plate (12). The pressure plate (12) presses against the heat insulation member (30) and presses the upper plastic (20) onto the cover plate (11). The heat insulation member (30) is provided between the upper plastic (20) and the upper surface of the cover plate (11) and between the upper plastic (20) and the lower surface of the pressure plate (12).

5. The top cover assembly according to claim 4, characterized in that, The cover plate (11) has a recess (111), at least a portion of the upper plastic (20) is located in the recess (111), and a heat insulation member (30) between the upper plastic (20) and the cover plate (11) is located in the recess (111).

6. The top cover assembly according to claim 4, characterized in that, The projection of the heat insulation element (30) onto the upper surface of the upper plastic (20) is greater than or equal to the range of the upper surface of the upper plastic (20); and / or the projection of the heat insulation element (30) onto the lower surface of the upper plastic (20) is greater than or equal to the range of the lower surface of the upper plastic (20).

7. The top cover assembly according to any one of claims 1 to 6, characterized in that, The top cover assembly also includes a lower plastic (40) and a sealing ring (50). The lower plastic (40) is disposed below the top cover (10) and has a second through hole (41) that is connected to the first through hole (211). The sealing ring (50) is disposed on the inner wall of the second through hole (41) and abuts against the top cover (10).

8. The top cover assembly according to claim 7, characterized in that, The diameter of the second through hole (41) is larger than the diameter of the first through hole (211), and the sealing ring (50) abuts against the lower surface at the edge of the first through hole (211).

9. The top cover assembly according to any one of claims 1 to 6, characterized in that, The heat insulation component (30) is at least one of glass or ceramic.

10. A battery, characterized in that, Includes the top cover assembly according to any one of claims 1 to 9.

Images