Top cover assembly and battery

Abstract

The utility model discloses a top cover assembly and a battery. The top cover assembly comprises a pole, a lower ring, a sealing piece, a lower insulating piece, a top cover sheet and an upper insulating piece, the lower ring is arranged outside the pole in a sleeving manner and is clamped with the pole; the sealing element is sleeved outside the pole, and the lower surface of the sealing element is propped against the lower ring; the lower ring is arranged between the pole and the lower insulating part; the lower ring and the lower insulating piece abut against the inner surface of the top cover piece, and the sealing piece is arranged between the pole and the top cover piece; the upper insulating part is arranged on the outer surface of the top cover sheet, and the upper insulating part abuts against the upper surface of the sealing part; and the upper insulating part is clamped with the pole, and the upper insulating part is matched with the lower ring to press the top cover plate and the sealing part. The upper insulating part and the lower ring are respectively clamped with the pole to prevent the pole from rotating, and the upper insulating part and the lower ring are matched to tightly press the top cover plate and the sealing part between the upper insulating part and the lower ring and the pole, so that the pole is prevented from loosening, and the stability and the strength of the top cover assembly structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of power batteries and energy storage batteries, and more specifically, to a top cover assembly and a battery. Background Technology

[0002] Lithium-ion batteries are widely used in power batteries, energy storage batteries, and other technological fields. Power batteries provide power for tools, typically powering electric vehicles, electric trains, electric bicycles, golf carts, and other similar vehicles, and are core components of new energy vehicles. Energy storage batteries are commonly used in home energy storage, power stations for solar and wind power generation equipment, portable power supplies, communication base stations, and as batteries for storing renewable energy. The two types of batteries have different application scenarios, and their performance and design differ.

[0003] Lithium batteries include a top cover assembly, which typically consists of multiple parts such as an upper plastic part, a top cover sheet, a lower plastic part, a seal, and terminals. After the top cover assembly is assembled, the terminals are prone to loosening, resulting in poor stability of the top cover assembly.

[0004] Therefore, there is an urgent need to provide a top cover assembly and battery to prevent the terminals from loosening and to improve the stability of the top cover assembly structure. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned defects in the existing technology and provide a top cover assembly, including:

[0006] pole;

[0007] The lower ring is sleeved on the outside of the pole post and engages with the pole post;

[0008] A sealing element, wherein the sealing element is sleeved outside the pole post, and the lower surface of the sealing element abuts against the lower ring;

[0009] The lower insulating element, wherein the lower ring is disposed between the pole post and the lower insulating element;

[0010] The top cover plate, the lower ring and the lower insulating member abut against the inner surface of the top cover plate, and the sealing member is disposed between the pole and the top cover plate;

[0011] An upper insulating member is disposed on the outer surface of the top cover plate, extending between the top cover plate and the pole post and abutting against the upper surface of the sealing member; the upper insulating member engages with the pole post, and the lower ring is at least partially located below the upper insulating member, with the upper insulating member and the lower ring post cooperating to press the top cover plate and the sealing member together.

[0012] This utility model also discloses a battery, including the aforementioned top cover assembly.

[0013] Implementing the embodiments of this utility model will have the following beneficial effects:

[0014] This invention prevents the pole from rotating by engaging the upper insulating component and the lower ring with the pole. The upper insulating component and the lower ring work together to press the top cover plate, the sealing component, and the pole located between them, thus preventing the pole from loosening and improving the stability and strength of the top cover assembly structure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] in:

[0017] Figure 1 A schematic diagram of the top cover assembly provided by this utility model;

[0018] Figure 2 for Figure 1 A cross-sectional view along the A-A' direction;

[0019] Figure 3 A schematic diagram of the lower ring in the top cover assembly provided by this utility model;

[0020] Figure 4 A schematic diagram of a pole post in the top cover assembly provided by this utility model;

[0021] Figure 5 Another schematic diagram of the top cover assembly provided by this utility model;

[0022] Figure 6 for Figure 5 A cross-sectional view along the B-B' direction;

[0023] Figure 7 A schematic diagram of the bent portion of the top cover sheet in the top cover assembly provided by this utility model;

[0024] Figure 8 This is a schematic diagram of a sealing element in the top cover assembly provided by this utility model.

[0025] 1-Pole post, 11-First engaging step, 12-Groove, 13-Second engaging step, 14-Pressed flattened part, 2-Lower ring, 21-First settling groove, 3-Seal, 31-Second settling groove, 4-Lower insulating part, 41-Third engaging step, 5-Top cover plate, 51-Bending part, 511-First engaging groove, 52-Third settling groove, 6-Upper insulating part, 61-Engaging part. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figure 1 , Figure 2 This utility model discloses a top cover assembly, including: a pole post 1, a lower ring 2, a sealing element 3, a lower insulating element 4, a top cover plate 5, and an upper insulating element 6.

[0028] The lower ring 2 is fitted outside the pole post 1, and the lower ring 2 is engaged with the pole post 1.

[0029] The sealing element 3 is sleeved outside the pole post 1, and the lower surface of the sealing element 3 abuts against the lower ring 2.

[0030] The lower ring 2 is positioned between the pole post 1 and the lower insulating component 4.

[0031] The lower ring 2 and the lower insulating member 4 abut against the inner surface of the top cover plate 5, and the sealing member 3 is disposed between the pole post 1 and the top cover plate 5.

[0032] The upper insulating member 6 is disposed on the outer surface of the top cover plate 5. The upper insulating member 6 extends between the top cover plate 5 and the pole post 1 and abuts against the upper surface of the sealing member 3. The upper insulating member 6 engages with the pole post 1, and the lower ring 2 is at least partially located below the upper insulating member 6. The upper insulating member 6 and the lower ring 2 cooperate to press the top cover plate 5 and the sealing member 3 together.

[0033] Understandably, the upper insulating member 6 extends between the top cover plate 5 and the pole post 1 and abuts against the upper surface of the pole post 1, so that the top cover plate 5 and the pole post 1 are spaced apart, thus preventing the top cover plate 5 and the pole post 1 from coming into contact and causing a short circuit.

[0034] In this embodiment, the upper insulating member 6 and the lower ring 2 are respectively engaged with the pole post 1. The lower ring 2 is at least partially located below the lower insulating member 4. The upper insulating member 6 and the lower ring 2 cooperate to press the top cover plate 5 and the sealing member 3 located between them, providing axial thrust to the sealing member 3, increasing the compression of the sealing member 3, and enhancing the stability and sealing of the top cover assembly. The upper insulating member 6 and the lower ring 2 are respectively engaged with the pole post 1 to prevent the pole post 1 from rotating, avoid the pole post 1 from loosening, and improve the stability and strength of the top cover assembly structure.

[0035] In one specific embodiment, combined with Figure 2 , Figure 3 The lower ring 2 has a first settling groove 21 on its side wall, and the pole post 1 has a first engaging step 11 on its side wall. The first engaging step 11 engages with the first settling groove 21, thereby engaging the lower ring 2 with the pole post 1.

[0036] Specifically, the side wall of the lower ring 2 may include a plurality of first settling grooves 21 arranged along its circumference, and the plurality of first settling grooves 21 are not connected to each other; the side wall of the pole post 1 includes a plurality of first engaging steps 11 arranged along its circumference, and the plurality of first engaging steps 11 engage with the first settling grooves 21 respectively to improve the engagement stability and prevent the pole post 1 from rotating.

[0037] Alternatively, the side wall of the pole post 1 may be provided with a settling groove (not shown in the figure), and the lower ring 2 may be provided with an engaging step, which engages with the settling groove of the pole post 1 through the engaging step.

[0038] In one specific embodiment, combined with Figure 2 , Figure 4 The side wall of the pole post 1 is provided with a groove 12 that is recessed in the radial direction of the pole post 1. The upper insulating member 6 includes a locking part 61, which is located between the top cover plate 5 and the pole post 1. The locking part 61 engages with the groove 12, thereby engaging the lower ring 2 with the pole post 1 and engaging the upper insulating member 6 with the pole post 1.

[0039] Specifically, the sidewall of the pole post 1 may include a plurality of grooves 12 arranged along its circumference, and the plurality of grooves 12 are not connected to each other; the upper insulating member 6 includes a plurality of engaging parts 61, the engaging parts 61 being engaging protrusions, and the plurality of engaging protrusions engaging with the grooves 12 respectively, thereby improving the engagement stability and preventing the pole post 1 from rotating.

[0040] Alternatively, the side wall of the pole post 1 may have a protruding engagement protrusion (not shown in the figure), and the upper insulating member 6 may have an engagement groove, so that the pole post 1 engages with the engagement groove of the upper insulating member through the engagement protrusion.

[0041] It should be noted that the groove 12 on the side wall of the pole post 1 can be directly formed, or the top of the pole post 1 can be riveted to obtain the riveted flattened part 14, and the riveted flattened part 14 and the main body of the pole post 1 form the groove 12.

[0042] Furthermore, when the groove 12 on the side wall of the pole post 1 is a directly formed groove 12, the upper insulating member 6 is preferably a rubber-coated insulating member. Rubber coating is a process of covering the surface of an existing structure with a layer of other material by injection molding or other methods. The lower ring 2 is also preferably a rubber-coated insulating member.

[0043] In this embodiment, the top cover assembly requires the pole post 1 to be coated with glue twice. The assembly method includes: firstly coating the bottom of the pole post 1 to form a lower ring 2, which is fixed to the pole post 1 to facilitate the assembly of subsequent components; then putting on the sealing element 3, which passes through the top cover plate 5, and then coating it with glue a second time to form an upper insulating element 6 to fix the pole post 1 and the top cover plate 5. The upper insulating element 6, in conjunction with the lower ring 2, can also achieve the compression of the sealing element 3. After completion, the lower insulating element 4 is assembled and heat-fused.

[0044] Furthermore, when the groove 12 on the side wall of the pole post 1 is a groove 12 formed by pressing and riveting the top of the pole post 1, the upper insulating part 6 is preferably a snap-fit ​​insulating part. The snap-fit ​​insulating part is a separate component, which reduces the number of assembly steps, shortens the assembly time, and makes the assembly more convenient.

[0045] In this embodiment, the top cover assembly requires only one coating of the pole post 1. The assembly method includes: coating the bottom of the pole post 1 to form a lower ring 2, fitting a sealing element 3, passing through the top cover piece 5, assembling an insulating element 6, and finally expanding (riveting) the top of the pole post 1 to form a riveted flattened part 14 that presses against the upper insulating element 6, so that the upper insulating element 6 fills the groove 12 and engages with the pole post 1, thereby fixing the pole post 1 and compressing the sealing ring. After completion, the lower insulating element 4 is assembled and heat-fused.

[0046] Furthermore, the lower ring 2 can also be a snap-fit ​​insulating component. The lower ring 2 can be integrally formed with the lower insulating component 4 to form a separate part, which is convenient for assembly. When the lower ring 2 is a rubber-coated insulating component, multiple pole posts 1 can be rubber-coated at the same time, which is efficient. Rubber coating first facilitates the installation and positioning of subsequent components.

[0047] In one specific embodiment, combined with Figure 2 , Figures 5-6 The top cover 5 also includes a bent portion 51 that protrudes radially toward the pole post 1, and an engaging portion 61 located between the bent portion 51 and the pole post 1; the outer surface of the seal 3 engages with the bent portion 51.

[0048] It is understandable that the seal 3 is located between the top cover plate 5 and the pole post 1, and the outer surface of the seal 3 engages with the bending part 51, which further enhances the compression of the seal 3 in the axial direction, improves the stability of the pole post 1, and avoids the lateral and longitudinal displacement of the pole post 1; the engaging part 61 is located between the bending part 51 and the pole post 1, and can also prevent the upper insulating part 6 from falling out of the groove 12, thereby improving the stability and strength of the overall structure of the top cover assembly.

[0049] Furthermore, combined Figure 2 , Figure 7 The outer surface of the bent portion 51 is provided with a first engaging groove 511, and the upper insulating member 6 engages with the first engaging groove 511. In this embodiment, the outer surface of the bent portion 51 of the top cover plate 5 is provided with an engaging groove, and the upper insulating member 6 engages with it to prevent the upper insulating member 6 from rotating, thereby improving the stability of the top cover assembly. Optionally, the cross-section of the bent portion 51 along the radial direction of the pole post 1 can be circular or non-circular. The non-circular bent portion 51 cooperates with the upper insulating member 6 and the pole post 1 to further prevent the pole post 1 from rotating.

[0050] Furthermore, combined Figures 2-3 , Figure 8 The sealing element 3 has a second settling groove 31 on its side wall, and the pole post 1 has a second engaging step 13 on its side wall, which engages with the second settling groove 31.

[0051] In this embodiment, the sealing element 3 is an L-shaped sealing ring. The L-shaped sealing element 3 engages with the side wall of the pole post 1, facilitating the positioning of the sealing element 3. The engaging connection enables the positioning of the sealing element 3 and prevents lateral displacement of the sealing element 3.

[0052] Furthermore, combined Figure 2 , Figure 6 The inner surface of the top cover plate 5 is provided with a third settling groove 52, the lower ring 2 is accommodated in the third settling groove 52, and the lower insulating member 4 is provided with a third engaging step 41. The third engaging step 41 engages with the third settling groove 52, so that the lower insulating member 4 engages with the top cover plate 5, which facilitates installation and positioning.

[0053] Specifically, the cross-section of the third settling tank 52 can be circular or non-circular. Preferably, the cross-section of the third settling tank 52 is non-circular. The lower insulating member 4 and the lower ring 2 cooperate with the pole post 1 to further prevent the pole post 1 from rotating.

[0054] In this specific embodiment, the pole post 1 is equipped with a lower ring 2, and combined with a third settling groove 52 of regular or irregular shape on the inner side of the top cover plate 5. Since insufficient creepage distance poses a risk of electrical conductivity, a lower insulating component 4 is installed to prevent rotation at the bottom of the pole post 1. The pole post 1 is equipped with a sealing component 3 and an upper sealing component 3. The upper sealing component 3 fills the groove 12 of the pole post 1, and simultaneously cooperates with the groove 12 on the outer side of the bent portion 51 of the top cover plate 5 to prevent rotation at the top of the pole post 1.

[0055] This utility model also discloses a battery, including the top cover assembly of any one of the above embodiments.

[0056] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A top cover assembly, characterized in that, include: pole; The lower ring is sleeved on the outside of the pole post and engages with the pole post; A sealing element, wherein the sealing element is sleeved outside the pole post, and the lower surface of the sealing element abuts against the lower ring; The lower insulating element, wherein the lower ring is disposed between the pole post and the lower insulating element; The top cover plate, the lower ring and the lower insulating member abut against the inner surface of the top cover plate, and the sealing member is disposed between the pole and the top cover plate; An upper insulating member is disposed on the outer surface of the top cover plate, extending between the top cover plate and the pole post and abutting against the upper surface of the sealing member; the upper insulating member engages with the pole post, and the lower ring is at least partially located below the upper insulating member, with the upper insulating member and the lower ring post cooperating to press the top cover plate and the sealing member together.

2. The top cover assembly according to claim 1, characterized in that, The lower ring sidewall is provided with a first settling groove, and the pole sidewall is provided with a first engaging step, which engages with the first settling groove.

3. The top cover assembly according to claim 1, characterized in that, The side wall of the pole post is provided with a groove recessed in the radial direction of the pole post, and the upper insulating member includes a locking part, which is located between the top cover plate and the pole post, and the locking part engages with the groove.

4. The top cover assembly according to claim 3, characterized in that, The top cover also includes a bent portion protruding radially toward the pole post, and the engaging portion is located between the bent portion and the pole post; the outer surface of the seal engages with the bent portion.

5. The top cover assembly according to claim 4, characterized in that, The outer surface of the bent portion is provided with a first engaging groove, and the upper insulating member engages with the first engaging groove.

6. The top cover assembly according to claim 1, characterized in that, The sealing element has a second settling groove on its side wall, and the pole post has a second engaging step on its side wall, which engages with the second settling groove.

7. The top cover assembly according to claim 1, characterized in that, The inner surface of the top cover plate is provided with a third settling groove, the lower ring is accommodated in the third settling groove, and the lower insulating member is provided with a third engaging step, which engages with the third settling groove.

8. The top cover assembly according to claim 1, characterized in that, The lower insulating component is integrally formed with the lower ring.

9. The top cover assembly according to claim 1, characterized in that, The lower ring is a rubber-coated insulating component or a snap-fit ​​insulating component, and the upper insulating component is a rubber-coated insulating component or a snap-fit ​​insulating component.

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

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