Battery

Abstract

The utility model discloses a battery, which comprises an electrode cover plate, a battery cover plate and a battery cover plate, the polar column comprises a column body and a bottom plate, the bottom plate is arranged on the inner side of the electrode cover plate, the polar column is connected to the bottom plate and penetrates through the electrode via hole to the outer side of the electrode cover plate, and a first ring groove is formed in the peripheral side of the column body; and the sealing ring is filled in a gap between the pole and the electrode via hole, the inner circumference of the sealing ring is accommodated in the first annular groove, the outer circumference of the sealing ring surrounds the electrode via hole on the inner side of the electrode cover plate, and the outer circumference of the sealing ring is accommodated between the electrode cover plate and the bottom plate. The battery provided by the embodiment of the utility model has the advantages of convenience and firmness in installation, improved sealing performance and the like.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a battery. Background Technology

[0002] In related technologies, the sealing ring of the battery forms a seal in the holes of the terminal post and the electrode cover plate. However, during the manufacturing process, the outer periphery of the sealing ring is squeezed by the electrode cover plate, which can cause the sealing ring to deviate from the accurate installation position of the terminal post, resulting in improper installation. Furthermore, after the outer periphery of the sealing ring is squeezed by the electrode cover plate, the inner periphery of the sealing ring warps outward from the electrode cover plate, causing a gap between the sealing ring and the terminal post, affecting the battery's sealing performance. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a battery that has advantages such as convenient and secure installation and improved sealing.

[0004] To achieve the above objectives, a battery according to an embodiment of the present invention includes: an electrode cover plate having an electrode through hole; a terminal post including a column and a base plate, the base plate being disposed on the inner side of the electrode cover plate, the terminal post being connected to the base plate and extending through the electrode through hole to the outer side of the electrode cover plate, the outer periphery of the column having a first annular groove; and a sealing ring filling the gap between the terminal post and the inner wall of the electrode through hole, the inner periphery of the sealing ring being accommodated in the first annular groove, the outer periphery of the sealing ring surrounding the electrode through hole on the inner side of the electrode cover plate, and the outer periphery of the sealing ring being accommodated between the electrode cover plate and the base plate.

[0005] The battery according to the present invention has the advantages of convenient and secure installation and improved sealing.

[0006] According to some specific embodiments of the present invention, the inner circumference of the sealing ring has a first sealing portion whose thickness gradually decreases towards the radial center, the inner circumferential edge of the first sealing portion has a circumferentially extending edge, and the bottom of the first annular groove is configured with a gradually decreasing width to match the shape of the first sealing portion.

[0007] Furthermore, the inner circumference of the sealing ring has a plurality of first notches arranged at intervals along the circumference, the first notches dividing the first sealing portion into multiple segments.

[0008] According to some specific embodiments of the present invention, the inner circumference of the sealing ring is constructed with a second sealing part, the inner circumferential edge of the cross-section of the second sealing part forms an arc-shaped profile, and the bottom of the first annular groove is arc-shaped to match the shape of the second sealing part.

[0009] Furthermore, the inner circumference of the sealing ring has a plurality of second notches arranged at intervals along the circumference, the second notches dividing the second sealing portion into multiple segments.

[0010] According to some specific embodiments of the present invention, the battery further includes: an outer encapsulation component, which is connected to the outside of the electrode cover plate and surrounds the outer periphery of the column, and the outer encapsulation component covers the sealing ring on the outside of the electrode cover plate; and an inner encapsulation component, which is connected to the inside of the electrode cover plate and surrounds the bottom plate and the outer periphery of the sealing ring.

[0011] According to some specific embodiments of the present invention, the column is provided with a second annular groove on the outer side of the electrode cover plate. The second annular groove is located on the side of the first annular groove away from the bottom plate, and the inner periphery of the outer encapsulation is accommodated in the second annular groove.

[0012] According to some specific embodiments of the present invention, the sidewall of the second annular groove is constructed with an anti-rotation slot and an anti-rotation block. The anti-rotation slot and the anti-rotation block are arranged alternately along the circumference of the second annular groove. The outer packaging part is accommodated in the anti-rotation slot and is stopped by the anti-rotation block along the circumference.

[0013] According to some specific embodiments of this utility model, both the outer packaging component and the inner packaging component are resin components, and the hardness of the outer packaging component is greater than that of the inner packaging component.

[0014] According to some specific embodiments of the present invention, the inner side of the electrode cover plate is constructed with a recessed groove adapted to the shape of the base plate, the base plate is accommodated in the recessed groove, the sealing ring is sealed between the base plate and the bottom wall of the recessed groove along the thickness direction, the inner encapsulation component is connected to the radial outer side of the sealing ring, and the inner encapsulation component is sealed between the outer edge of the base plate and the side wall of the recessed groove.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the pole and sealing ring in the existing technology;

[0018] Figure 2 This is a partial structural schematic diagram of a battery according to an embodiment of the present utility model;

[0019] Figure 3 This is a partially exploded view of a battery according to an embodiment of the present utility model;

[0020] Figure 4 This is a partial cross-sectional view of a battery according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the sealing ring of a battery according to the first embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the sealing ring of a battery according to the second embodiment of the present invention;

[0023] Figure 7 This is an assembly diagram of the sealing ring according to the third embodiment of the present invention;

[0024] Figure 8 This is an assembly diagram of the sealing ring according to the fourth embodiment of the present invention;

[0025] Figure label:

[0026] Existing technology, Figure 1 :

[0027] 200' pole, 300' sealing ring;

[0028] This utility model, Figures 2-8 :

[0029] Electrode cover plate 100, electrode through hole 101, electrode post 200, column body 210, base plate 220.

[0030] First annular groove 211, sealing ring 300, outer encapsulation component 400, inner encapsulation component 500

[0031] First gap 311, second gap 321

[0032] First sealing part 310, second sealing part 320, second annular groove 212, anti-rotation groove 213, anti-rotation block 214.

[0033] Settling tank 102. Detailed Implementation

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0036] In the description of this utility model, "multiple" means two or more.

[0037] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0038] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0039] The battery according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0040] like Figures 1-8 As shown, the battery according to an embodiment of the present invention includes: an electrode cover plate 100, an electrode post 200, and a sealing ring 300. The electrode cover plate 100 has an electrode through hole 101. The electrode post 200 includes a column body 210 and a base plate 220. The base plate 220 is disposed on the inner side of the electrode cover plate 100, and the electrode post 200 is connected to the base plate 220 and extends from the electrode through hole 101 to the outer side of the electrode cover plate 100. A first annular groove 211 is formed on the outer peripheral side of the column body 210. The sealing ring 300 fills the gap between the electrode post 200 and the inner wall of the electrode through hole 101. The inner periphery of the sealing ring 300 is accommodated in the first annular groove 211, and the outer periphery of the sealing ring 300 surrounds the electrode through hole 101 on the inner side of the electrode cover plate 100. The outer periphery of the sealing ring 300 is accommodated between the electrode cover plate 100 and the base plate 220.

[0041] For example, the battery is a lithium battery, and the electrode cover 100 is a plain aluminum plate and is disposed on one side of the battery casing. The diameter of the terminal post 200 is slightly smaller than the diameter of the electrode through hole 101, and the sealing ring 300 forms a seal between the terminal post 200 and the electrode through hole 101. The sealing ring 300 is an elastic element, such as a fluororubber element, and the sealing ring 300 is constructed into an annular sheet structure. When the outer periphery of the sealing ring 300 is compressed, it will undergo elastic deformation, causing it to be compressed along the thickness direction.

[0042] According to the battery embodiment of this utility model, a first annular groove 211 is constructed on the outer periphery of the column 210 to limit the sealing ring 300. During battery production, when the electrode cover plate 100 applies pressure to the outer periphery of the sealing ring 300, the inner periphery of the sealing ring 300 remains in the assembled position due to the limitation of the first annular groove 211. Operators do not need to adjust the position of the sealing ring 300, making battery installation more convenient. This effectively improves the... Figure 1 In the prior art, the sealing ring 300' may warp relative to the terminal post 200', thus the sealing ring 300 is more firmly held on the terminal post 200. After the sealing ring 300, terminal post 200 and electrode cover plate 100 are assembled together, the battery can be packaged, improving production efficiency.

[0043] Furthermore, the inner circumference of the sealing ring 300 forms a seal with the electrode post 200, and the outer circumference of the sealing ring 300 forms a seal with the inner wall of the electrode through hole 101 of the electrode cover plate 100. Simultaneously, the outer circumference of the sealing ring 300 also fills the gap between the electrode cover plate 100 and the base plate 220 in the thickness direction. Specifically, for example... Figure 5 and Figure 6 As shown, the outer periphery of the sealing ring 300 deforms when compressed by the electrode cover plate 100, thus forming a seal between the electrode cover plate 100 and the base plate 220 on both sides of the sealing ring 300 in the thickness direction. Therefore, the sealing ring 300 forms a seal between the electrode post 200 and the electrode through hole 101, and between the electrode cover plate 100 and the base plate 220, effectively isolating the inside and outside of the battery, preventing leakage of electrolyte from the battery interior, and preventing external moisture and impurities from entering the battery interior, thus providing excellent sealing performance.

[0044] Therefore, the battery according to the present invention has advantages such as convenient and secure installation and improved sealing.

[0045] In some specific embodiments of this utility model, such as Figure 5 As shown, the inner circumference of the sealing ring 300 has a first sealing portion 310 whose thickness gradually decreases towards the radial center. The inner circumferential edge of the first sealing portion 310 has a circumferentially extending edge. The bottom of the first annular groove 211 is configured with a gradually decreasing width to match the shape of the first sealing portion 310.

[0046] in, Figure 5 The upper middle part is the unassembled sealing ring 300, and the lower part is the sealing ring 300 after being compressed by the electrode cover plate 100. For example, the cross-section of the first sealing part 310 is triangular. The cross-section of the first annular groove 211 is also triangular. The edge of the first sealing part 310 forms a seal with the bottom of the first annular groove 211, and the surfaces on both sides of the edge also fit against the inner surface of the first annular groove 211 to form a seal. When the outer periphery of the sealing ring 300 is subjected to pressure from the electrode cover plate 100, the edge of the first sealing part 310 is engaged in the first annular groove 211 and will not disengage from the first annular groove 211. The inner periphery of the sealing ring 300 always maintains a good seal with the column 210 in the first annular groove 211.

[0047] Furthermore, such as Figure 6 As shown, the inner circumferential structure of the sealing ring 300 has a plurality of first notches 311 arranged circumferentially at intervals, and the first notches 311 divide the first sealing part 310 into multiple segments.

[0048] For example, the length of the first notch 311 is equal to the length of the first sealing portion 310. The first sealing portion 310 and the first notch 311 are arranged alternately around the circumference, and multiple first notches 311 are evenly arranged around the circumference, thus multiple segments of the first sealing portion 310 are evenly arranged around the circumference. When the first sealing portion 310 is installed in the first annular groove 211, by constructing the first notch 311, the sealing ring 300 is more likely to deform during the process of being fitted onto the column 210, reducing the installation difficulty. After the sealing ring 300 is assembled, the first sealing portion 310 is accommodated in the first annular groove 211, and a seal is also formed between the first notch 311 of the sealing ring 300 and the groove opening of the first annular groove 211, thereby ensuring sealing performance.

[0049] In some specific embodiments of this utility model, such as Figure 7 As shown, the inner circumference of the sealing ring 300 has a second sealing part 320. The inner circumferential edge of the cross-section of the second sealing part 320 forms an arc-shaped profile, and the bottom of the first annular groove 211 is arc-shaped to match the shape of the second sealing part 320.

[0050] in, Figure 7The upper middle part is the unassembled sealing ring 300, and the lower part is the sealing ring 300 after being compressed by the electrode cover plate 100. For example, the cross-section of the second sealing part 320 is semi-circular, and the cross-section of the first annular groove 211 is also semi-circular. The arc surface of the first sealing part 310 fits against the arc surface of the bottom of the first annular groove 211 to achieve a sealing effect. When the outer periphery of the sealing ring 300 is subjected to pressure from the electrode cover plate 100, the arc surface of the first sealing part 310 is engaged in the arc-shaped groove formed by the first annular groove 211 and will not disengage from the first annular groove 211. The inner periphery of the sealing ring 300 always maintains a good seal with the column 210 within the first annular groove 211.

[0051] Furthermore, such as Figure 8 As shown, the inner circumference of the sealing ring 300 has a plurality of second notches 321 arranged circumferentially, which divide the second sealing portion 320 into multiple segments.

[0052] For example, the length of the second notch 321 is equal to the length of the second sealing portion 320. The second sealing portion 320 and the second notch 321 are arranged alternately around the circumference, and multiple second notches 321 are evenly arranged around the circumference, thus multiple segments of the second sealing portion 320 are evenly arranged around the circumference. When the second sealing portion 320 is installed in the first annular groove 211, the second notch 321 makes it easier for the sealing ring 300 to deform during the process of being fitted onto the column 210, reducing the installation difficulty. After the sealing ring 300 is assembled, the second sealing portion 320 is accommodated in the first annular groove 211, and a seal is formed between the second notch 321 of the sealing ring 300 and the opening of the first annular groove 211, thereby ensuring sealing performance.

[0053] In some specific embodiments of this utility model, such as Figure 4 As shown, the battery also includes an outer encapsulation 400 and an inner encapsulation 500. The outer encapsulation 400 is connected to the outside of the electrode cover plate 100 and surrounds the outer periphery of the pillar 210, and the outer encapsulation 400 covers the outer side of the electrode cover plate 100 with a sealing ring 300. The inner encapsulation 500 is connected to the inside of the electrode cover plate 100 and surrounds the bottom plate 220 and the outer periphery of the sealing ring 300.

[0054] The inner encapsulation component 500 is a separate structural component, assembled inside the electrode cover plate 100, serving as insulation on the inside of the battery. The outer encapsulation component 400, through injection molding, encapsulates the pre-assembled sealing ring 300, terminal post 200, and electrode cover plate 100, providing insulation on the outside of the battery. Furthermore, the sealing ring 300 is held in the thickness direction by the inner encapsulation component 500 and the outer encapsulation component 400, which further seal the sealing ring 300 on both sides of its thickness. Even if the sealing ring 300 ages, the outer encapsulation component 400 and the inner encapsulation component 500 can still cover it, preventing sealing problems. Therefore, the encapsulation by the outer encapsulation component 400 and the inner encapsulation component 500 ensures the battery's lifespan.

[0055] In some specific embodiments of this utility model, such as Figure 6 and Figure 8 As shown, the column 210 has a second annular groove 212 on the outside of the electrode cover plate 100. The second annular groove 212 is located on the side of the first annular groove 211 away from the bottom plate 220, and the inner periphery of the outer package 400 is accommodated in the second annular groove 212.

[0056] For example, the outer package 400 is injection molded onto the outside of the electrode cover plate 100 using an injection molding process. The second annular groove 212 is constructed through the pillar 210, which increases the contact area between the package and the pillar 210 and provides a limit for the outer package 400. The outer package 400 is always connected to the pillar 210 as a whole, and at the same time, the sealing performance of the electrode post 200 area outside the battery is further improved.

[0057] Furthermore, the sidewall of the second annular groove 212 is constructed with an anti-rotation slot 213 and an anti-rotation block 214. The anti-rotation slot 213 and the anti-rotation block 214 are arranged alternately along the circumference of the second annular groove 212. The outer package 400 is partially accommodated in the anti-rotation slot 213 and is stopped by the anti-rotation block 214 along the circumference.

[0058] The outer package 400 fills the anti-rotation slot 213 and forms a limiting position with the anti-rotation block 214, thereby keeping the electrode post 200 and the outer package 400 fixed to each other, and preventing the electrode post 200 from rotating. In addition, a limiting structure that limits the outer package 400 can also be constructed on the electrode cover plate 100 to prevent the outer package 400 and the electrode post 200 from rotating together.

[0059] In some specific embodiments of this utility model, both the outer encapsulation 400 and the inner encapsulation 500 are resin parts, and the hardness of the outer encapsulation 400 is greater than that of the inner encapsulation 500.

[0060] Specifically, the outer encapsulation 400 can be made of PPS (polyphenyl sulfone resin), and the inner encapsulation 500 can be made of PP (polypropylene). The outer encapsulation 400 and the inner encapsulation 500 serve as insulation on the inner and outer sides of the electrode cover plate 100, respectively. At the same time, due to the greater rigidity of the outer encapsulation 400, it can also provide a certain positioning and support for the electrode post 200, ensuring that the axis of the electrode post 200 does not shift.

[0061] In some specific embodiments of this utility model, such as Figure 4 As shown, the inner side of the electrode cover plate 100 has a recess 102 that is adapted to the shape of the base plate 220. The base plate 220 is accommodated in the recess 102. The sealing ring 300 is sealed between the base plate 220 and the bottom wall of the recess 102 along the thickness direction. The inner encapsulation 500 is connected to the radial outer side of the sealing ring 300 and is sealed between the outer edge of the base plate 220 and the side wall of the recess 102.

[0062] A stepped structure is formed at the opening of the recess 102. Part of the inner encapsulation component 500 fits into the stepped surface inside the recess 102, and another part fits into another stepped surface outside the recess 102, resulting in good positioning between the electrode cover plate 100 and the inner encapsulation component 500. Furthermore, the inner encapsulation component 500 not only encapsulates the electrode cover plate 100 in the thickness direction, but also forms an encapsulation on the outer periphery of the base plate 220 and the sealing ring 300, further ensuring good sealing between the electrode post 200 and the electrode cover plate 100.

[0063] Other configurations and operations of the battery according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that, include: An electrode cover plate having electrode through holes; An electrode post, comprising a column body and a base plate, wherein the base plate is disposed on the inner side of the electrode cover plate, the electrode post is connected to the base plate and passes through the electrode through hole to the outer side of the electrode cover plate, and a first annular groove is formed on the outer peripheral side of the column body; A sealing ring is provided, which fills the gap between the electrode post and the inner wall of the electrode through hole. The inner circumference of the sealing ring is accommodated in the first annular groove, and the outer circumference of the sealing ring surrounds the electrode through hole on the inner side of the electrode cover plate. The outer circumference of the sealing ring is accommodated between the electrode cover plate and the base plate.

2. The battery according to claim 1, characterized in that, The inner circumference of the sealing ring has a first sealing portion whose thickness gradually decreases towards the radial center. The inner circumferential edge of the first sealing portion has a circumferentially extending edge. The bottom of the first annular groove is configured with a gradually decreasing width to match the shape of the first sealing portion.

3. The battery according to claim 2, characterized in that, The inner circumferential structure of the sealing ring has a plurality of first notches arranged at intervals along the circumference, the first notches dividing the first sealing portion into multiple segments.

4. The battery according to claim 1, characterized in that, The inner circumference of the sealing ring has a second sealing part, and the inner circumferential edge of the cross-section of the second sealing part forms an arc-shaped profile. The bottom of the first annular groove is arc-shaped to match the shape of the second sealing part.

5. The battery according to claim 4, characterized in that, The inner circumferential structure of the sealing ring has a plurality of second notches arranged circumferentially at intervals, the second notches dividing the second sealing portion into multiple segments.

6. The battery according to claim 1, characterized in that, Also includes: An outer encapsulation component is connected to the outside of the electrode cover plate and surrounds the outer periphery of the column, and the outer encapsulation component covers the sealing ring on the outside of the electrode cover plate; An inner encapsulation component is connected to the inner side of the electrode cover plate and surrounds the outer periphery of the base plate and the sealing ring.

7. The battery according to claim 6, characterized in that, The column has a second annular groove on the outside of the electrode cover plate. The second annular groove is located on the side of the first annular groove away from the bottom plate, and the inner periphery of the outer package is accommodated in the second annular groove.

8. The battery according to claim 7, characterized in that, The sidewall of the second annular groove is constructed with an anti-rotation slot and an anti-rotation block. The anti-rotation slot and the anti-rotation block are arranged alternately along the circumference of the second annular groove. The outer packaging part is accommodated in the anti-rotation slot and is stopped by the anti-rotation block along the circumference.

9. The battery according to claim 6, characterized in that, Both the outer and inner packaging components are made of resin, and the hardness of the outer packaging component is greater than that of the inner packaging component.

10. The battery according to claim 6, characterized in that, The inner side of the electrode cover plate has a recessed groove adapted to the shape of the base plate. The base plate is accommodated in the recessed groove. The sealing ring is sealed between the base plate and the bottom wall of the recessed groove along the thickness direction. The inner encapsulation component is connected to the radial outer side of the sealing ring and is sealed between the outer edge of the base plate and the side wall of the recessed groove.

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