Lithium ion battery cover plate and battery

Abstract

The utility model discloses a lithium ion battery cover plate and a battery, and belongs to the technical field of lithium ion batteries. The lithium ion battery cover plate comprises a base plate, an elastic stop frame and a rivet, the rivet comprises a rivet pressing end and a rivet connecting end which are connected together, and a sealing rib is integrally formed and arranged on a connecting plate of the rivet connecting end in a protruding mode; when the rivet penetrates through the first pole connecting hole and the second pole connecting hole to be connected, the sealing rib abuts against the elastic stop frame to seal the cover plate. When the rivet penetrates through the first pole connecting hole and the second pole connecting hole to be connected, the sealing rib abuts against the elastic stop frame, the sealing rib extrudes the elastic stop frame, the position, extruded by the sealing rib, of the elastic stop frame rebounds, and a sealing structure of the cover plate is formed between the elastic stop frame at the position and the sealing rib. And a sealing ring does not need to be additionally mounted for sealing, so that the use of parts in the battery cover plate is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion batteries, and more specifically, to a lithium ion battery cover plate and a battery. Background Art

[0002] At present, lithium-ion power batteries are widely welcomed by the market as a new type of clean energy. With the increase of lithium-ion battery production capacity, the cost of lithium batteries has also attracted much attention. Therefore, how to reduce the cost of lithium-ion batteries will become a problem to be faced in the future. Among them, the cost of lithium-ion batteries mainly comes from material and manufacturing costs, and the cost of chemical raw materials in the material cost is mainly affected by the market, so how to reduce the cost of its structural parts is particularly important.

[0003] Lithium-ion batteries usually include components such as battery cells, cover plates, stop frames, rivets, and pressure plates, among which the rivets need to pass through the cover plates and the stop frames for connection, so the connection holes of the rivets need to be sealed. Patent CN102339959A discloses a pole-type lithium battery cover plate, in which a pole mounting hole is opened on the substrate, and the rivets are connected through the pole mounting hole, and the seal at the pole mounting hole is sealed by a sealing gasket. In this solution, sealing is performed by simply setting a sealing gasket, which increases the use of sealing gaskets, which is not conducive to reducing the cost of structural parts. Utility Model Content

[0004] The utility model provides a lithium-ion battery cover plate and a battery, solving the problem in the prior art that the rivet connection holes are sealed by additionally providing sealing pads or sealing rings, which is not conducive to reducing the cost of battery structural parts.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0006] A lithium-ion battery cover, comprising:

[0007] A base plate, on which a pole connection hole is provided;

[0008] An elastic stop frame is located on the inner side of the base plate, and a second pole connection hole is provided thereon, wherein the position of the second pole connection hole corresponds to the position of the first pole connection hole;

[0009] The rivet comprises a rivet pressing end and a rivet connecting end connected together, and a sealing rib is integrally formed and protruded on the connecting plate of the rivet connecting end;

[0010] When the rivet passes through the first pole connection hole and the second pole connection hole for connection, the sealing rib presses against the elastic stop frame to seal the cover plate.

[0011] Furthermore, the sealing rib is arranged around the connecting pole between the rivet pressing end and the rivet connecting end.

[0012] Furthermore, at least one sealing rib is provided.

[0013] Furthermore, the cross section of the sealing rib is arc-shaped.

[0014] Furthermore, the cross section of the sealing rib is V-shaped.

[0015] Furthermore, the cross section of the sealing rib is trapezoidal.

[0016] Furthermore, the elastic stop frame is a stop frame made of elastic material.

[0017] Furthermore, it also includes an insulating plate and a pressing plate located outside the base plate, the insulating plate and the pressing plate are both arranged through the rivet, and the insulating plate is located between the base plate and the pressing plate.

[0018] Furthermore, it also includes an explosion-proof valve and a protection sheet, wherein the explosion-proof valve is located at the explosion-proof valve hole on the substrate, and the protection sheet is located outside the explosion-proof valve.

[0019] The utility model also provides a battery, comprising a battery core and the lithium-ion battery cover plate, wherein the battery core is connected to the rivet connection end.

[0020] The technical solution provided by the utility model has the following beneficial effects compared with the prior art: the battery cover adopts an elastic stop frame, a rivet rivet connection end, and a sealing rib is integrally formed and protruded on the connection plate of the rivet connection end. When the rivet passes through the pole connection hole 1 and the pole connection hole 2 for connection, the sealing rib presses against the elastic stop frame, and the sealing rib will squeeze the elastic stop frame. The position where the elastic stop frame is squeezed by the sealing rib will rebound, and a sealing structure of the cover is formed between the elastic stop frame and the sealing rib at this position. There is no need to install a sealing ring for sealing, which reduces the use of parts in the battery cover, reduces the process steps of battery production, reduces costs, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the explosion structure of a lithium-ion battery cover;

[0022] Figure 2 It is a partial cross-sectional schematic diagram of a lithium-ion battery cover;

[0023] Figure 3 is a schematic diagram of a rivet structure;

[0024] Figure 4 Schematic diagram of the cross-section structure of a rivet.

[0025] Description of labels:

[0026] 1. Base plate; 2. Elastic stop frame; 3. Rivet; 31. Rivet pressing end; 32. Rivet connecting end; 33. Sealing rib; 34. Connecting pole; 4. Insulating plate; 5. Pressing plate; 6. Explosion-proof valve; 61. Protective sheet. DETAILED DESCRIPTION

[0027] The present invention will be described in detail with reference to the accompanying drawings. What is described here is only a preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and other ways also fall within the scope of the present invention.

[0028] like Figure 1-4 As shown, this embodiment provides a lithium-ion battery cover, including a substrate 1, an elastic stop frame 2 and a rivet 3, wherein the substrate 1 is provided with a pole connection hole 1; the elastic stop frame 2 is located on the inner side of the substrate 1, and the elastic stop frame 2 and the substrate 1 are attached together. The elastic stop frame 2 is provided with a pole connection hole 2, and further, the position of the pole connection hole 2 corresponds to the position of the pole connection hole 1. In this embodiment, two pole connection holes 1 and two pole connection holes are provided respectively, and are respectively arranged near the two ends of the substrate 1.

[0029] The elastic stop frame 2 is a stop frame made of elastic material, such as a stop frame made of plastic material, or a stop frame made of rubber material or a stop frame made of other elastic materials.

[0030] The rivet 3 includes a rivet clamping end 31 and a rivet connecting end 32 connected together, and a sealing rib 33 is integrally formed and protruded on the connecting plate of the rivet connecting end 32, and the sealing rib 33 is arranged around the connecting pole 34 between the rivet clamping end 31 and the rivet connecting end 32. When the rivet 3 passes through the pole connecting hole 1 and the pole connecting hole 2 for connection, the sealing rib 33 presses against the elastic stop frame 2 to seal the cover plate. Specifically, after the rivet clamping end 31 and the rivet connecting end 32 are connected, the sealing rib 33 on the rivet connecting end 32 will press against the elastic stop frame 2 to squeeze the elastic stop frame 2, and the elastic stop frame 2 will rebound after being squeezed by the sealing rib 33, thereby forming a sealing structure of the cover plate between the sealing rib 33.

[0031] In this embodiment, on the one hand, an elastic stop frame 2 is used, and on the other hand, a sealing rib 33 is integrated on the rivet connection end 32, so that a sealing structure is formed between the elastic stop frame 2 and the sealing rib 33, and there is no need to install a sealing ring for sealing, which reduces the use of parts in the battery cover, reduces the process steps of battery production, reduces costs, and improves production efficiency.

[0032] In this embodiment, two sealing ribs 33 are provided, and the cross section of the sealing ribs 33 is arc-shaped. In other embodiments, one sealing rib 33 may be provided, or other numbers may be provided, depending on the sealing requirements. The cross section of the sealing rib 33 may also be V-shaped or trapezoidal.

[0033] The battery cover in this embodiment also includes an insulating plate 4 and a pressing plate 5 located on the outside of the substrate 1. The insulating plate 4 and the pressing plate 5 are both set through the rivet 3, and the insulating plate 4 is located between the substrate 1 and the pressing plate 5. The insulating plate 4 isolates and insulates the pressing plate 5 from the substrate 1 to improve the safety of the battery. The battery cover also includes an explosion-proof valve 6 and a protective sheet 61. The explosion-proof valve 6 is installed at the explosion-proof valve hole on the substrate 1. The explosion-proof valve hole is set between the two pole connection holes, and the protective sheet 61 is located on the outside of the explosion-proof valve 6. The explosion-proof valve 6 serves as a safety protection structure for the battery cell. When the internal gas pressure of the battery cell is too high or there is a risk of thermal runaway, it opens to discharge gas and heat. The protective sheet 61 is mainly a protective structure to prevent external mechanical damage from causing the explosion-proof valve to open prematurely or reduce the reliability of the explosion-proof valve.

[0034] In another embodiment, a battery is provided, comprising a battery cell and the lithium-ion battery cover plate, wherein the battery cell is connected to the rivet connection end 32 .

[0035] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inside" and "outside" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The protection scope of the present invention is limited only by the claims. Thanks to the teachings of the present invention, those skilled in the art will easily recognize that alternative structures to the structures disclosed in the present invention can be used as feasible alternative embodiments, and the embodiments disclosed in the present invention can be combined to generate new embodiments, which also fall within the scope of the appended claims.

Claims

1. A lithium-ion battery cover, characterized in that: include, A base plate (1) having a pole connection hole 1 formed thereon; An elastic stop frame (2) is located on the inner side of the base plate (1), and a second pole connection hole is provided thereon, wherein the position of the second pole connection hole corresponds to the position of the first pole connection hole; The rivet (3) comprises a rivet pressing end (31) and a rivet connecting end (32) connected together, wherein a sealing rib (33) is integrally formed and protruded on the connecting plate of the rivet connecting end (32); When the rivet (3) passes through the first pole connection hole and the second pole connection hole for connection, the sealing rib (33) presses against the elastic stop frame (2) to seal the cover plate.

2. The lithium-ion battery cover according to claim 1, characterized in that: The sealing rib (33) is arranged around the connecting pole (34) between the rivet pressing end (31) and the rivet connecting end (32).

3. The lithium-ion battery cover according to claim 2, characterized in that: At least one sealing rib (33) is provided.

4. The lithium-ion battery cover according to claim 3, characterized in that: The cross section of the sealing rib (33) is arc-shaped.

5. The lithium-ion battery cover according to claim 3, characterized in that: The cross section of the sealing rib (33) is V-shaped.

6. The lithium-ion battery cover plate according to claim 3, characterized in that: The cross section of the sealing rib (33) is trapezoidal.

7. The lithium-ion battery cover according to any one of claims 1 to 6, characterized in that: The elastic stop frame (2) is a stop frame made of elastic material.

8. The lithium-ion battery cover according to claim 1, characterized in that: It also includes an insulating plate (4) and a pressing plate (5) located outside the base plate (1); the insulating plate (4) and the pressing plate (5) are both arranged through the rivet (3), and the insulating plate (4) is located between the base plate (1) and the pressing plate (5).

9. The lithium-ion battery cover according to claim 8, characterized in that: It also comprises an explosion-proof valve (6) and a protective sheet (61), wherein the explosion-proof valve (6) is located at the explosion-proof valve hole on the substrate (1), and the protective sheet (61) is located outside the explosion-proof valve (6).

10. A battery, characterized in that: It comprises a battery cell and the lithium-ion battery cover plate according to any one of claims 1 to 9, wherein the battery cell is connected to the rivet connection end (32).

Images