Top cover structure and battery

Abstract

The invention provides a top cover structure and a battery, and relates to the technical field of battery manufacturing. The top cover structure comprises a top cover plate, a liquid injection opening and a leakage-proof piece. The liquid injection port is formed in the first surface of the top cover plate; an opening area is arranged on the top cover plate and is used for accommodating a pole of the battery; on the first surface of the top cover plate, the outer edge of the trepanning area is provided with an annular groove area, and the annular leakage-proof piece is embedded in the groove area; the outer side, close to the liquid injection opening, of the groove area is provided with a leakage-proof groove, the outer edge of the leakage-proof piece is provided with a protruding structure corresponding to the shape of the leakage-proof groove, and the leakage-proof groove is matched with the protruding structure in an embedded mode. The corresponding leakage-proof piece is embedded in the periphery of the hole opening area, the protruding structure is arranged on the leakage-proof piece, the leakage-proof groove is formed in the groove area, the protruding structure and the leakage-proof groove are embedded, the embedding tightness of the leakage-proof piece and the top cover plate is improved, and therefore leaked liquid during liquid injection is blocked based on the leakage-proof piece, and the leakage-proof effect is improved. Therefore, the adverse situation that liquid permeates into the perforated area is reduced.

Description

Technical Field

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

[0002] Currently, lithium batteries are widely used in various types of electronic devices. A typical lithium battery includes a battery casing, a cell top cover, and electrolyte. The battery casing and top cover are welded and sealed using techniques such as laser welding. A small hole is usually pre-drilled in the top cover to inject electrolyte into the battery. The hole is then welded and sealed, thus vacuum-storing the electrolyte within the battery casing. During battery filling and subsequent transport, electrolyte spillage is inevitable. Spilled electrolyte can easily seep into the battery top cover, corroding its structure, shortening battery life, and posing safety hazards. Furthermore, the seeping electrolyte can create micro-short circuits between the terminals and the cover, affecting subsequent casing insulation and edge voltage tests. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a top cover structure and a battery to improve the problem in the prior art that electrolyte can easily penetrate into the battery top cover.

[0004] To address the aforementioned issues, in a first aspect, embodiments of this application provide a top cover structure, which includes: a top cover plate, an injection port, and a leak-proof component; The injection port is located on the first surface of the top cover plate; The top cover plate is provided with an opening area for accommodating the battery terminals; On the first surface of the top cover plate, the outer edge of the opening area is set as an annular groove area, and the annular leak-proof component is embedded in the groove area; The groove area is provided with a leak-proof groove on the outer side near the injection port, and the outer edge of the leak-proof component is provided with a protrusion structure corresponding to the shape of the leak-proof groove, and the leak-proof groove and the protrusion structure are fitted and matched.

[0005] In the above implementation process, the top cover plate has an opening area to accommodate the battery terminals, thereby connecting the battery's internal and external structures. A corresponding annular groove area is provided at the outer edge of the opening area to embed a corresponding annular leak-proof component. This leak-proof component extends downwards and embeds into the top cover plate, forming a ring-shaped groove and barrier to effectively prevent liquid from seeping into the top cover plate from the opening area. Furthermore, the leak-proof component has a raised structure, and the groove area has a leak-proof groove. When the leak-proof component is embedded in the groove area, the raised structure can engage with the leak-proof groove to further improve the tightness of the fit between the leak-proof component and the top cover plate. This effectively blocks leaked liquid during filling, reducing the risk of liquid seeping into the opening area. Through the structural design of the top cover, the risk of liquid seeping into the battery is effectively reduced, thereby extending the battery's lifespan and improving battery safety during use.

[0006] Optionally, the anti-leakage groove includes: a first section structure and a second section structure; The first segment and the second segment are connected; The first segment is arranged parallel to the plane of the cover plate, and the second segment is arranged perpendicular to the plane of the cover plate; The first segment and the second segment are perpendicular to each other; A groove is provided at one end of the first segment structure near the first surface.

[0007] In the above implementation process, the leak-proof groove provided on the outer side of the recessed area can include a connected multi-segment structure, such as a connected first segment structure and a second segment structure. The two segments are set according to different directions and are perpendicular to each other to form an irregular groove structure. Furthermore, in order to facilitate the fixing of the leak-proof component, a groove structure can be provided at the end of the first end structure near the first surface of the top cover plate, so as to further fix the protruding structure through the groove structure, thereby improving the fit between the leak-proof component and the recessed area, and reducing the adverse situation of liquid entering the opening area from between the leak-proof component and the recessed area.

[0008] Optionally, the protruding structure is provided with a protruding fixing part, and the fixing part is oriented in the direction pointing towards the first surface; The fixing part is fitted into the groove of the first section of the leak-proof groove, and the protruding structure is fixed in the leak-proof groove by the fixing part.

[0009] In the above implementation process, the protruding structure can be configured to match the shape of the anti-leakage groove, and the protruding structure can be provided with a protruding fixing part, and the fixing part is oriented towards the first surface, so that the fixing part can fit into the groove provided in the first end structure in the anti-leakage groove, thereby improving the fitting degree between the protruding structure and the anti-leakage groove, and thus improving the reliability of the anti-leakage component embedded in the groove area. When the liquid spreads to the perimeter of the opening area of ​​the top cover, the liquid can only penetrate along the perimeter of the opening area into the space between the anti-leakage component and the groove area. The liquid preferentially accumulates or spreads in the anti-leakage groove. Since the depth of the anti-leakage groove is deeper than that of the groove area, the surface tension of the liquid is difficult to overcome gravity and spread to other positions in the groove area, finally forming a sealing effect, thereby preventing the liquid from continuing to penetrate and corrode the opening area, greatly improving the structural life of the top cover structure and the safety of the battery.

[0010] Optionally, the top cover structure further includes: a sealing element; The sealing element is disposed between the inner wall of the opening area and the pole.

[0011] In the above implementation process, in order to further reduce the adverse effects of liquid seeping into the battery from the opening area, a corresponding sealing element can also be provided between the inner wall of the opening area and the electrode post. The sealing element seals the gap between the inner wall of the opening area and the electrode post, reducing the corrosion caused by the liquid contacting the electrode post and other structures.

[0012] Optionally, the seal abuts against the inner edge of the leak-proof element.

[0013] In the above process, the sealing element also abuts against the inner edge of the leak-proof element. Even if liquid seeps into the space between the leak-proof element and the groove area from the outer edge of the leak-proof element, the liquid will preferentially accumulate in the groove area, thereby forming a stable air pressure sealing effect between the leak-proof element and the groove area. The tension and gravity of the liquid are difficult to break the sealing effect and continue to diffuse to the sealing element, thereby improving the sealing reliability of the sealing element.

[0014] Optionally, the seal may be composed of insulating non-metallic materials or electrically conductive materials.

[0015] In the above implementation process, since different types of batteries have different insulation or micro-short circuit requirements, the sealing component can be selected according to the actual needs to insulate the pole and the top cover plate, or connect the electrode and the top cover plate, to meet the usage requirements of different application scenarios.

[0016] Optionally, the top cover structure further includes: a connector; The connector is fixedly mounted on the leak-proof component; The connector is connected to the pole.

[0017] In the above implementation process, in order to achieve connection with the external structure, the top cover structure can also be provided with a connector. The connector is fixedly installed on the leak-proof component, and the connector is connected to the terminal post so as to connect the terminal post to other external structures through the connector, thereby realizing the electrical connection between the battery and the external structure.

[0018] Optionally, the leak-proof component comprises insulating non-metallic materials or electrically conductive materials.

[0019] In the above implementation process, since different types of batteries have different insulation or micro-short circuit requirements, the leak-proof component can be selected according to the actual needs to insulate the pole and the top cover plate, or connect the electrode and the top cover plate, to meet the usage requirements of different application scenarios.

[0020] Optionally, a fastener is provided on the second surface of the top cover plate; The fastener is used to fix the pole post to the top cover plate.

[0021] In the above implementation process, a fixing member can also be provided on the second side of the top cover plate to fix the terminal post to the top cover plate, so that the terminal post can pass through the opening area provided on the top cover plate, and the fixing member physically isolates the cell connected to the terminal post from the top cover plate, thereby achieving the corresponding fixing and insulation functions and reducing adverse situations such as shaking of the terminal post during battery movement.

[0022] Secondly, embodiments of this application also provide a battery, the battery including the top cover structure described in any one of the first aspects above.

[0023] In summary, the embodiments of this application provide a top cover structure and a battery. A corresponding leak-proof component is embedded around the opening area of ​​the top cover plate, and the leak-proof component is provided with a protruding structure and a leak-proof groove is provided in the groove area. The fitting of the protruding structure and the leak-proof groove improves the tightness of the fitting between the leak-proof component and the top cover plate. Thus, the leak-proof component blocks the liquid that leaks during liquid injection, thereby reducing the adverse situation of liquid seeping into the opening area. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of a top cover structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of a top cover structure provided in an embodiment of this application.

[0026] Icons: 100-Top cover plate; 200-Injection port; 300-Leak-proof component; 400-Pole post; 110-Opening area; 120-Groove area; 121-Leak-proof groove; 310-Protruding structure; 1211-First section structure; 1212-Second section structure; 1213-Groove; 311-Fixing part; 510-Sealing component; 520-Connecting component; 530-Fixing component. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of the embodiments of this application.

[0028] In current battery top cover structures, in order to enable the terminals to pass through the top cover for electrical connection, the top cover structure is usually assembled from multiple parts. There are gaps between these parts. During battery transport and other movements, the electrolyte may seep into the top cover structure and the interior of the battery under the action of gravity or surface tension, corroding the top cover structure, thereby shortening the battery life and causing some safety hazards.

[0029] To address the aforementioned issues, this application provides a top cover structure and a battery. A corresponding leak-proof component is embedded around the opening area of ​​the top cover plate, and the leak-proof component has a raised structure and a leak-proof groove in the recessed area. The fit between the raised structure and the leak-proof groove improves the tightness of the fit between the leak-proof component and the top cover plate, thereby blocking the liquid leaking during liquid injection and reducing the adverse situation of liquid seeping into the opening area.

[0030] Optionally, a top cover structure can be incorporated into the battery, working in conjunction with a corresponding casing structure to protect the battery cells and other structures within the battery. The battery can be any of various types of lithium batteries or similar structures with a casing.

[0031] Please see Figure 1 , Figure 1 This is a schematic diagram of a top cover structure provided in an embodiment of this application. The top cover structure includes: a top cover plate 100, an injection port 200, and a leak-proof component 300.

[0032] The liquid injection port 200 is located on the first surface of the top cover plate 100. The top cover plate 100 has an opening area 110 for accommodating the battery terminals 400. On the first surface of the top cover plate 100, the outer edge of the opening area 110 is formed by an annular groove area 120, within which an annular leak-proof component 300 is embedded. The opening area 110 on the top cover plate 100 accommodates the battery terminals 400, thereby connecting the battery's internal and external structures based on the terminals 400. The annular groove area 120 on the outer edge of the opening area 110 allows for the embedding of the annular leak-proof component 300 within the groove area 120. This causes the leak-proof component 300 to extend downwards and embed into the top cover plate 100, forming an annular groove and barrier to effectively prevent liquid from seeping into the top cover plate 100 from the opening area 110.

[0033] Optionally, the top cover 100 can be a cover structure of various shapes, and the liquid injection port 200 can be a hole-like structure set on the top cover 100 by drilling or other operations. The liquid injection port 200 can be set in various shapes, such as a funnel, to facilitate liquid filling. After the battery casing and the top cover structure are welded and sealed into a sealed whole, the electrolyte and other liquids required by the battery can be injected into the battery through the liquid injection port 200.

[0034] For example, the top cover 100 can be made of various types of materials, such as various different types of metal materials, according to actual needs, which can provide a reliable shell structure foundation for the battery and a connection foundation for electrical connections.

[0035] Optionally, the leak-proof component 300 can be configured as a corresponding plastic structure, and the first surface of the top cover plate 100 can be located away from the end of the internal battery cell. The size and shape of the opening area 110 can be configured according to the actual shape of the electrode post 400. For example, a hollowed-out circular area, or a hollowed-out rectangular area, elliptical area, etc., can be opened on the top cover plate 100 as the corresponding opening area 110. Correspondingly, the groove area 120 provided on the outer edge of the opening area 110 can also be a corresponding annular shape such as a circular ring, rectangular ring, or elliptical ring. The leak-proof component 300 can also be configured as a corresponding annular plastic structure such as a circular ring, rectangular ring, or elliptical ring. The groove area 120 is provided on the first surface of the top cover plate 100 so as to block liquids, such as electrolytes, that leak from the first surface of the top cover plate 100 through the leak-proof component 300 embedded in the groove area 120.

[0036] For example, the terminal post 400 can be configured as an I-shaped structure, which can be divided into an inverted T-shaped structure and a straight-line structure. The larger surface of the inverted T-shaped structure is inside the battery and is called the inner terminal post. The straight-line structure is outside the battery and is called the outer terminal post. The straight-line structure can be connected to the inverted T-shaped structure by laser welding or riveting to form an I-shaped structure. The larger surface of the terminal post 400 is inside the battery and is connected to the tab of the cell. The terminal post 400 can pass through the opening area 110 to connect the battery to other external structures.

[0037] It should be noted that a leak-proof groove 121 is provided on the outer side of the recessed area 120 near the injection port 200, and a protruding structure 310 corresponding to the shape of the leak-proof groove 121 is provided on the outer edge of the leak-proof component 300. The leak-proof groove 121 and the protruding structure 310 fit together. The leak-proof component 300 has the protruding structure 310, and the recessed area 120 has the leak-proof groove 121. When the leak-proof component 300 is embedded in the recessed area 120, the protruding structure 310 can fit into the leak-proof groove 121, further improving the tightness of the fit between the leak-proof component 300 and the top cover plate 100. This effectively blocks leaked liquid during injection, reducing the adverse effects of liquid seeping into the opening area 110. Through the structural design of the top cover, the adverse effects of liquid seeping into the battery are effectively reduced, thereby extending the battery's lifespan and improving the safety of battery use.

[0038] Optionally, the bottom of the outer edge of the leak-proof component 300 (i.e., the side closest to the second surface of the top cover plate 100) can be provided with a skirt as a corresponding protrusion structure 310. Combined with a leak-proof groove 121 provided in the recessed area 120, the two fit together to form an inner cavity structure between the bottom of the leak-proof component 300 and the recessed area 120. When the electrolyte remaining in the injection port 200 diffuses into the leak-proof component 300 and spreads downwards, the electrolyte will preferentially accumulate in the leak-proof groove 121 in the recessed area 120. At this time, the surface tension of the electrolyte is difficult to overcome gravity and spread to the inner cavity to reach the vicinity of the opening area 110. Moreover, when there is a lot of electrolyte, it will preferentially fill the leak-proof groove 121, so that the inner cavity structure between the leak-proof component 300 and the recessed area 120 is sealed. At this time, a stable air pressure is formed in the inner cavity structure. The surface tension and gravity of the electrolyte are difficult to break the inner cavity air pressure, so it cannot continue to diffuse to other locations.

[0039] Alternatively, assuming the recess depth of the other part of the groove region 120 on the top cover plate 100 is d1, the recess depth of the anti-leakage groove 121 on the top cover plate 100 is d2, where d2 is greater than d1, that is, the anti-leakage groove 121 has a deeper groove depth, so that the anti-leakage groove 121 can fit into the protrusion structure 310 on the anti-leakage component 300 and store the liquid that has seeped into the top cover plate 100 under the action of gravity when placed at a normal angle.

[0040] Optionally, please refer to Figure 2 , Figure 2 This is a schematic diagram of a top cover structure provided in an embodiment of this application. The leak-proof groove 121 provided on the outer side of the recessed area 120 may include a multi-segment structure. For example, the leak-proof groove 121 may include a first segment structure 1211 and a second segment structure 1212. The first segment structure 1211 and the second segment structure 1212 are connected. The first segment structure 1211 is parallel to the plane of the cover plate, and the second segment structure 1212 is perpendicular to the plane of the cover plate. The first segment structure 1211 and the second segment structure 1212 are perpendicular to each other. A groove 1213 is provided at one end of the first segment structure 1211 near the first surface. The two segments are arranged in different directions and are perpendicular to each other to form an irregularly shaped groove structure. Furthermore, in order to facilitate the fixing of the leak-proof component 300, a groove 1213 structure can be provided at one end of the first end structure near the first surface of the top cover plate 100, so as to further fix the protruding structure 310 through the groove 1213 structure, thereby improving the fitting degree between the leak-proof component 300 and the groove area 120, so as to reduce the adverse situation of liquid entering the opening area 110 from between the leak-proof component 300 and the groove area 120.

[0041] Optionally, the first end structure and the second segment structure 1212 can form a connected L-shaped structure. The orientation of the L-shaped structure can be towards the opening region 110 or away from the opening region 110 (e.g., ...). Figure 2 As shown in the image).

[0042] For example, the groove 1213 structure provided in the first end structure can be an acute-angled groove 1213 pointing towards the first surface. It is possible to form multiple grooves in different directions based on the anti-leakage groove 121 and the configuration.

[0043] Alternatively, please continue reading Figure 2The raised structure 310 is provided with a raised fixing part 311, the fixing part 311 being oriented towards the first surface. The fixing part 311 is fitted into the groove 1213 of the first section structure 1211 in the leak-proof groove 121, and the raised structure 310 is fixed in the leak-proof groove 121 by fitting the fixing part 311. The raised structure 310 can be configured to match the shape of the leak-proof groove 121, and the raised structure 310 can be provided with a raised fixing part 311, the fixing part 311 being oriented towards the first surface, so that the fixing part 311 can fit into the groove 1213 provided in the first end structure in the leak-proof groove 121, improving the fitting degree between the raised structure 310 and the leak-proof groove 121, thereby improving the reliability of the leak-proof component 300 embedded in the groove area 120, when liquid spreads to the opening area of ​​the top cover. When the liquid is around the opening area 110, it can only seep into the space between the leak-proof component 300 and the groove area 120. The liquid will preferentially accumulate or spread in the leak-proof groove 121. Since the depth of the leak-proof groove 121 is deeper than that of the groove area 120, the surface tension of the liquid is difficult to overcome gravity and spread to other parts of the groove area 120, thus forming a sealing effect. This prevents the liquid from continuing to seep in and corrode the opening area 110, greatly improving the structural life of the top cover structure and the safety of the battery.

[0044] Optionally, the overall shape of the protruding structure 310 can match the internal space of the leak-proof groove 121. The fixing part 311 on the protruding structure 310 can be configured as a corresponding barb structure, with the barb structure pointing in the direction of the sharp corner. The barbs in the barb structure can penetrate deep into the groove 1213 of the leak-proof groove 121, and there is also a corresponding gap area between the fixing part 311 and the leak-proof groove 121, so that the gap area can accommodate and store the liquid that has seeped into the top cover plate 100. The fixing part 311 can further prevent the spread of liquid in the top cover plate 100 and further enhance the structural stability of the leak-proof component 300 and the top cover plate 100.

[0045] Please continue reading. Figure 2 To further reduce the adverse effects of liquid seeping into the battery interior from the opening area 110, the top cover structure may also include a seal 510, which is disposed between the inner wall of the opening area 110 and the terminal post 400. A corresponding seal 510 may also be provided between the inner wall of the opening area 110 and the terminal post 400 to seal the gap between the inner wall of the opening area 110 and the terminal post 400, thereby reducing corrosion caused by contact between the liquid and the terminal post 400 and other structures.

[0046] Optionally, the seal 510 can be configured as a sealing ring device of various shapes, such as circular ring, rectangular ring, and elliptical ring, based on the shape of the inner wall of the opening area 110 and the shape of the outer wall of the pole post 400.

[0047] It should be noted that the sealing element 510 abuts against the inner edge of the leak-proof element 300. The sealing element 510 also abuts against the inner edge of the leak-proof element 300. Even if liquid seeps from the outer edge of the leak-proof element 300 into the space between the leak-proof element 300 and the groove area 120, the liquid will preferentially accumulate in the groove area 120, thus creating a stable air pressure sealing effect between the leak-proof element 300 and the groove area 120. The surface tension and gravity of the liquid are unlikely to break the sealing effect and continue to diffuse to the sealing element 510, thereby improving the sealing reliability of the sealing element 510.

[0048] Optionally, since different types of batteries have different insulation or micro-short circuit requirements, the seal 510 may be composed of insulating non-metallic materials or conductive materials. The seal 510 can be made of appropriate insulating non-metallic materials or conductive materials according to actual needs, to insulate the electrode post 400 from the top cover plate 100, or to connect the electrode to the top cover plate 100, to meet the usage requirements of different application scenarios.

[0049] For example, if the battery structure requires that the terminal 400 not form a short circuit with the top cover, the seal 510 can be made of a highly insulating non-metallic material, such as various types of rubber or other plastic materials. If the battery structure requires that the top cover and the cell form a micro-short circuit, the seal 510 can be made of a material with a certain degree of conductivity, such as copper, iron, or other metallic materials.

[0050] Optionally, by designing the leak-proof component 300 in conjunction with the groove area 120, the electrolyte overflowing during the liquid injection process and the subsequent transfer process is less likely to spread to the seal 510 and cause corrosion damage to the seal 510, thereby increasing the structural life of the seal 510 and greatly improving the structural life of the top cover structure and battery safety.

[0051] Optionally, a leak-proof groove 121 can also be provided on the inner side of the groove area 120 away from the injection port 200, and a corresponding protrusion structure 310 can also be provided on the inner edge of the leak-proof component 300. The two leak-proof structures at both ends can further reduce the adverse situation of liquid penetrating into the seal 510 and thus corroding the seal 510.

[0052] Please continue reading. Figure 2 To achieve connection with external structures, the top cover structure also includes a connector 520. The connector 520 is fixedly mounted on the leak-proof component 300 and connected to the terminal post 400. The connector 520 is fixedly mounted on the leak-proof component 300 and connected to the terminal post 400 to connect the terminal post 400 to other external structures, thereby achieving electrical connection between the battery and the external structures.

[0053] Optionally, the connector 520 can be configured as a corresponding rivet block or other structure, and the leak-proof component 300 can be configured as a barrel-shaped structure with a hollow area. The rivet block can be fixed in the hollow area of ​​the leak-proof component 300 by welding, screws, adhesives, etc. In addition, the pole post 400 can be welded to the rivet block through the upper part of the opening area 110. The rivet block can be welded to other external structures such as the busbar, thereby forming a current line with the inside of the battery.

[0054] Optionally, since different types of batteries have different insulation or micro-short circuit requirements, the leak-proof component 300 may be composed of insulating non-metallic materials or conductive materials. The leak-proof component 300 can be made of appropriate insulating non-metallic materials or conductive materials according to actual needs, to insulate the electrode post 400 from the top cover plate 100, or to connect the electrode to the top cover plate 100, to meet the usage requirements of different application scenarios.

[0055] For example, if the battery structure requires that the terminal post 400 not form a short circuit with the top cover, the leak-proof component 300 can be made of a highly insulating non-metallic material, such as various types of rubber or other plastic materials. If the battery structure requires that the top cover and the cell form a micro-short circuit, the leak-proof component 300 can be made of a material with a certain degree of conductivity, such as copper, iron, or other metallic materials.

[0056] Please continue reading. Figure 2 A fixing member 530 can also be provided on the second surface of the top cover plate 100. The fixing member 530 is used to fix the terminal post 400 to the top cover plate 100. The fixing member 530 can fix the terminal post 400 to the top cover plate 100, allowing the terminal post 400 to pass through the opening area 110 provided on the top cover plate 100. The fixing member 530 physically isolates the cell connected to the terminal post 400 from the top cover plate 100, achieving the corresponding fixing and insulation functions, and reducing adverse situations such as shaking of the terminal post 400 during battery movement.

[0057] Alternatively, the fastener 530 can be configured as a corresponding plastic structure.

[0058] In addition, the components in the various embodiments of this application can be integrated together to form an independent part, or each component can exist independently, or two or more components can be integrated to form an independent part.

[0059] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of 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 scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0060] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

[0061] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes said element.

Claims

1. A top cover structure, characterized in that, The top cover structure includes: a top cover plate, an injection port, and a leak-proof component; The injection port is located on the first surface of the top cover plate; The top cover plate is provided with an opening area for accommodating the battery terminals; On the first surface of the top cover plate, the outer edge of the opening area is set as an annular groove area, and the annular leak-proof component is embedded in the groove area; The groove area is provided with a leak-proof groove on the outer side near the injection port, and the outer edge of the leak-proof component is provided with a protrusion structure corresponding to the shape of the leak-proof groove, and the leak-proof groove and the protrusion structure are fitted and matched.

2. The top cover structure according to claim 1, characterized in that, in, The leak-proof groove includes: a first section structure and a second section structure; The first segment and the second segment are connected; The first segment is arranged parallel to the plane of the cover plate, and the second segment is arranged perpendicular to the plane of the cover plate; The first segment and the second segment are perpendicular to each other; A groove is provided at one end of the first segment structure near the first surface.

3. The top cover structure according to claim 2, characterized in that, in, The protruding structure is provided with a protruding fixing part, and the fixing part is oriented in the direction pointing towards the first surface; The fixing part is fitted into the groove of the first section of the leak-proof groove, and the protruding structure is fixed in the leak-proof groove by the fixing part.

4. The top cover structure according to claim 1, characterized in that, The top cover structure also includes: a sealing element; The sealing element is disposed between the inner wall of the opening area and the pole.

5. The top cover structure according to claim 4, characterized in that, The sealing element abuts against the inner edge of the leak-proof element.

6. The top cover structure according to claim 4, characterized in that, in, The seal is composed of insulating non-metallic materials or electrically conductive materials.

7. The top cover structure according to any one of claims 1-6, characterized in that, The top cover structure also includes: a connector; The connector is fixedly mounted on the leak-proof component; The connector is connected to the pole.

8. The top cover structure according to any one of claims 1-6, characterized in that, in, The leak-proof component is composed of insulating non-metallic materials or electrically conductive materials.

9. The top cover structure according to any one of claims 1-6, characterized in that, A fastener is provided on the second surface of the top cover plate; The fastener is used to fix the pole post to the top cover plate.

10. A battery, characterized in that, The battery includes the top cover structure as described in any one of claims 1-9.

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