CN220627979U

CN220627979U - Top cover assembly and battery

Info

Publication number: CN220627979U
Application number: CN202322279518.0U
Authority: CN
Inventors: 赵艺惠; 马媛媛
Original assignee: Lanjun New Energy Technology Co ltd
Current assignee: Lanjun New Energy Technology Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-03-19
Anticipated expiration: 2033-08-23

Abstract

The utility model discloses a top cover assembly and a battery, and relates to the technical field of batteries. The top cover assembly comprises a top cover sheet, an explosion-proof valve and a mounting seat, wherein a pressure relief hole is formed in the top cover sheet in a penetrating mode, one end of the pressure relief hole is covered by the explosion-proof valve, the mounting seat is connected with the top cover sheet, and the mounting seat is used for pressing and fixing the explosion-proof valve on the top cover sheet. The top cover assembly provided by the utility model can prevent the explosion-proof valve from being damaged, and ensure the explosion-proof performance of the explosion-proof valve, thereby improving the safety of the battery.

Description

Top cover assembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a top cover assembly and a battery.

Background

In order to meet the pressure relief and explosion prevention requirements, an explosion prevention valve is arranged on a top cover plate of the battery, and when the internal pressure of the battery reaches a threshold value, the explosion prevention valve is opened to finish pressure relief.

At present, the battery on the market, explosion-proof valve adopt welded mode to be connected with the top cap piece, and the welding process easily produces defects such as explosion point, welding through and hourglass welding, causes the influence to the explosion-proof performance of explosion-proof valve, damages the explosion-proof valve even, and then influences the security of battery.

Disclosure of Invention

The utility model aims to provide a top cover assembly which can prevent an explosion-proof valve from being damaged, ensure the explosion-proof performance of the explosion-proof valve and further improve the safety of a battery.

Another object of the present utility model is to provide a battery having a higher safety.

The embodiment of the utility model provides a technical scheme that:

the utility model provides a top cap subassembly, includes top cap piece, explosion-proof valve and mount pad, run through on the top cap piece and be provided with the pressure release hole, explosion-proof valve closing cap the one end of pressure release hole, the mount pad with the top cap piece is connected, just the mount pad will explosion-proof valve is pressed to be held and is fixed on the top cap piece.

Further, the top cover assembly further comprises an elastic sealing ring, wherein the elastic sealing ring is arranged between the explosion-proof valve and the top cover sheet and extends along the periphery of the pressure relief hole.

Further, an annular sealing groove is formed in the top cover plate, the annular sealing groove surrounds the pressure relief hole, one end of the elastic sealing ring is embedded in the annular sealing groove, and the other end of the elastic sealing ring is in circumferential abutting contact with the explosion-proof valve.

Further, an annular mounting groove is formed in the top cover plate, the annular mounting groove surrounds the annular sealing groove, and the mounting seat is circumferentially embedded in the annular mounting groove and is connected with the groove wall of the annular mounting groove.

Further, the mount pad is cyclic annular, the one end of mount pad with the top cap piece is connected, explosion-proof valve holding in the inside of mount pad, be provided with on the inside wall of mount pad and press and hold the rampart, press and hold the rampart laminating and press the explosion-proof valve is kept away from the periphery of the one end wall of top cap piece.

Further, the mounting seat is provided with a wide opening end and a narrow opening end, the pressing ring wall is positioned between the wide opening end and the narrow opening end, the area enclosed by the wide opening end is larger than the area enclosed by the narrow opening end, and the wide opening end is connected with the top cover sheet.

Further, a connecting skirt edge is formed by turning the wide opening end outwards in the circumferential direction, and one side, away from the narrow opening end, of the connecting skirt edge is attached to and connected with the top cover sheet.

Further, an annular mounting groove is formed in the top cover plate, the annular mounting groove surrounds the pressure relief hole, the connecting skirt is circumferentially embedded into the annular mounting groove, and one side, away from the narrow opening end, of the connecting skirt is welded with the bottom wall of the annular mounting groove.

Further, the explosion-proof valve is provided with a thinning notch.

The embodiment of the utility model also provides a battery, which comprises the top cover assembly, wherein the top cover assembly comprises a top cover plate, an explosion-proof valve and a mounting seat, a pressure release hole is formed in the top cover plate in a penetrating manner, the explosion-proof valve seals one end of the pressure release hole, the mounting seat is connected with the top cover plate, and the mounting seat is used for pressing and fixing the explosion-proof valve on the top cover plate.

Compared with the prior art, the top cover assembly provided by the utility model has the advantages that the pressure holding and fixing of the explosion-proof valve on the top cover sheet are realized through the connection of the mounting seat and the top cover sheet, so that the welding of the explosion-proof valve on the top cover sheet is avoided, and the influence on the explosion-proof performance of the explosion-proof valve caused by the occurrence of welding defects is avoided. Therefore, the top cover assembly provided by the utility model has the beneficial effects that: the explosion-proof valve can be prevented from being damaged, the explosion-proof performance of the explosion-proof valve is guaranteed, and therefore the safety of the battery is improved.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings that are required to be used in the embodiments will be briefly described. It is appreciated that the following drawings depict only certain embodiments of the utility model and are therefore not to be considered limiting of its scope. Other relevant drawings may be made by those of ordinary skill in the art without undue burden from these drawings.

FIG. 1 is an exploded view of a header assembly provided in an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a header assembly provided by an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of area A of FIG. 2;

FIG. 4 is a schematic view of the mounting base of FIG. 1;

fig. 5 is a schematic cross-sectional view of fig. 4.

Icon: 100-top cap assembly; 110-a top cover sheet; 111-a pressure relief hole; 112-an annular seal groove; 113-an annular mounting groove; 120-explosion-proof valve; 121-thinning the nicks; 130-a mounting base; 131-pressing the annular wall; 132-wide mouth end; 133-a narrow mouth end; 134-connecting skirts; 140-elastic sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings.

Examples

Referring to fig. 1, fig. 1 is an exploded view of a top cover assembly 100 according to the present embodiment.

The top cap assembly 100 provided in this embodiment is used to cover the casing of the battery to form a cavity for accommodating the battery. The top cover assembly 100 comprises a top cover plate 110, an explosion-proof valve 120 and a mounting seat 130, wherein a pressure relief hole 111 is formed in the top cover plate 110 in a penetrating manner, one end of the pressure relief hole 111 is covered by the explosion-proof valve 120, the mounting seat 130 is connected with the top cover plate 110, and the mounting seat 130 is used for pressing and fixing the explosion-proof valve 120 on the top cover plate 110.

It should be understood that the top cover assembly 100 provided in this embodiment further includes conventional components such as upper plastic, lower plastic, and poles, which are not described in the present embodiment. The top cover assembly 100 provided in this embodiment has the explosion-proof valve 120 pressed and fixed on the top cover sheet 110 by the mounting seat 130, so that welding of the explosion-proof valve 120 on the top cover sheet 110 is avoided, the explosion-proof performance of the explosion-proof valve 120 is prevented from being influenced due to welding defects, and damage to the explosion-proof valve 120 is also avoided.

Therefore, the top cap assembly 100 provided in this embodiment can prevent the explosion-proof valve 120 from being damaged, and ensure the explosion-proof performance of the explosion-proof valve 120, thereby improving the safety of the battery.

In order to improve the tightness between the sealing valve and the top cover sheet 110 to improve the explosion-proof effect, the top cover assembly 100 provided in this embodiment further includes an elastic sealing ring 140, where the elastic sealing ring 140 is disposed between the explosion-proof valve 120 and the top cover sheet 110 and extends along the periphery of the pressure release hole 111.

It is understood that the elastic sealing ring 140 has a certain elastic deformation capability, and may be made of rubber or other materials. The explosion-proof valve 120 is pressed and fixed on the top cover sheet 110 by the mounting seat 130, which is equivalent to that the mounting seat 130 and the top cover sheet 110 clamp the explosion-proof valve 120 together, and an elastic sealing ring 140 is arranged between the top cover sheet 110 and the explosion-proof valve 120, and the elastic sealing ring 140 is elastically deformed under the extrusion action, so that the gap between the explosion-proof valve 120 and the top cover sheet 110 is sealed.

Referring to fig. 2 and 3 in combination, fig. 2 is a schematic cross-sectional view of the top cover assembly 100 according to the present embodiment, and fig. 3 is an enlarged schematic view of a region a in fig. 2.

In this embodiment, in order to further improve the sealing performance, the top cover sheet 110 is provided with an annular sealing groove 112, the annular sealing groove 112 encloses the pressure relief hole 111, one end of the elastic sealing ring 140 is embedded in the annular sealing groove 112, and the other end is in circumferential abutment with the explosion-proof valve 120.

The annular seal groove 112 serves to limit deformation of the elastic seal ring 140 and increases the contact area between the elastic seal ring 140 and the top cap sheet 110, so that sealing performance is improved. Specifically, during the assembly process, when the elastic sealing ring 140 receives the extrusion force transmitted by the explosion-proof valve 120, the elastic sealing ring 140 is elastically deformed, and can be tightly attached to the side wall and the bottom wall of the annular sealing groove 112.

Referring to fig. 4 and fig. 5 in combination, fig. 4 is a schematic structural diagram of the mounting base 130, and fig. 5 is a schematic sectional diagram of the mounting base 130.

In this embodiment, the mounting seat 130 is annular, one end of the mounting seat 130 is connected with the top cover sheet 110, the explosion-proof valve 120 is accommodated in the mounting seat 130, the inner side wall of the mounting seat 130 is provided with a pressing ring wall 131, and the pressing ring wall 131 is attached to and presses the periphery of the end wall of the explosion-proof valve 120 far away from the top cover sheet 110.

Because the mounting seat 130 is annular and has a channel for high-pressure gas to leak, under the condition that the pressure holding annular wall 131 arranged on the inner side wall of the mounting seat 130 is bonded and the explosion-proof valve 120 is held in a pressure, the explosion-proof valve 120 can seal the channel of the mounting seat 130, and one end of the mounting seat 130 is connected with the periphery of the pressure release hole 111 on the top cover plate 110, which is equivalent to one end of the pressure release hole 111 in the channel of the mounting seat 130.

In practical application, in a state that the top cover sheet 110 covers the battery shell, the explosion-proof valve 120 and the mounting seat 130 are positioned in the shell, the other end channel of the mounting seat 130 is communicated with the space where the battery core is positioned, that is, the pressure of the space where the battery core is positioned can directly act on the explosion-proof valve 120 through the channel of the mounting seat 130. The explosion-proof valve 120 is provided with a thinning notch 121, when the pressure in the space exceeds a threshold value, the explosion-proof valve 120 is broken at the thinning notch 121 to be opened, and the internal high-pressure gas passes through the explosion-proof valve 120 and is discharged from the pressure relief hole 111, so that pressure relief is completed.

In this embodiment, the mounting base 130 has a wide opening end 132 and a narrow opening end 133, the pressing ring wall 131 is located between the wide opening end 132 and the narrow opening end 133, the area enclosed by the wide opening end 132 is larger than the area enclosed by the narrow opening end 133, and the wide opening end 132 is connected with the top cover sheet 110.

In fact, the projected areas of the explosion-proof valve 120 and the elastic sealing ring 140 in the respective thickness directions are between the area surrounded by the wide opening end 132 and the area surrounded by the narrow opening end 133, and in the assembly process, the explosion-proof valve 120 and the elastic sealing ring 140 can smoothly enter the installation seat 130 from the wide opening end 132. The narrow mouth end 133 can limit the mounting seat 130 of the explosion proof valve 120 after the wide mouth end 132 is connected to the top cover sheet 110 or is connected.

In this embodiment, the wide opening end 132 is welded to the top cover sheet 110, so as to improve the contact area, and obtain a better welding effect. In this embodiment, the wide mouth end 132 is formed with a connecting skirt 134 turned outward in the circumferential direction, and a side of the connecting skirt 134 away from the narrow mouth end 133 is bonded and welded to the top cover sheet 110.

In fact, in order to facilitate positioning of the welding operation of the wide opening end 132, in this embodiment, an annular mounting groove 113 is further provided on the top cover sheet 110, the annular mounting groove 113 encloses the annular sealing groove 112, the connecting skirt 134 is circumferentially embedded in the annular mounting groove 113, and one side of the connecting skirt 134 away from the narrow opening end 133 is bonded and welded to the bottom wall of the annular mounting groove 113.

In the actual assembly process, the elastic sealing ring 140 is firstly embedded into the annular sealing groove 112, then the explosion-proof valve 120 is installed into the installation seat 130 from the wide opening end 132, and one side of the explosion-proof valve 120 in the thickness direction is attached to the pressing ring wall 131 under the stop action of the pressing ring wall 131, and the other side faces the wide opening end 132. In this case, the connecting skirt 134 of the wide mouth end 132 is aligned and fitted into the annular mounting groove 113. In this process, the explosion-proof valve 120 deforms away from the one-side pressure-holding elastic seal 140 of the pressure-holding annular wall 131 until the connecting skirt 134 comes into contact with the bottom wall of the annular mounting groove 113. Then, the connecting skirt 134 and the groove wall of the annular mounting groove 113 may be welded and fixed in the circumferential direction.

It should be noted that, in the top cover assembly 100 provided in this embodiment, only the gap between the explosion-proof valve 120 and the top cover sheet 110 may affect the explosion-proof effect, and the elastic sealing ring 140 is additionally installed between the explosion-proof valve 120 and the top cover sheet 110, and the installation seat 130 is used for pressing and fixing, so as to achieve reliable sealing of the gap between the explosion-proof valve 120 and the top cover sheet 110, and ensure the explosion-proof effect. Even if welding defects are generated between the mounting seat 130 and the top cover sheet 110, the explosion-proof effect is not affected, the welding quality requirement is reduced, and the assembly difficulty is reduced.

In summary, the top cover assembly 100 provided in this embodiment can avoid damage to the explosion-proof valve 120, and ensure the explosion-proof performance of the explosion-proof valve 120, thereby improving the safety of the battery, and reducing the assembly difficulty.

In addition, the present embodiment also provides a battery, which includes a housing and a battery cell in addition to the top cap assembly 100 described above. The top cover sheet 110 is connected to the housing and covers the open end of the housing, the explosion-proof valve 120 and the mounting base 130 are both inside the housing, and the battery cell is also inside the housing.

In actual assembly, the assembly of the cap assembly 100 is completed and the battery cells are assembled into the housing. And then the electrodes of the battery cells are electrically connected with the poles in the top cover assembly 100, and after the completion, the top cover sheet 110 covers the open end of the housing and connection is established.

The battery provided in this embodiment has the advantages of lower assembly difficulty, better explosion-proof performance and higher safety due to the beneficial effects of the top cover assembly 100.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a top cap subassembly, its characterized in that includes top cap piece (110), explosion-proof valve (120) and mount pad (130), run through on top cap piece (110) and be provided with pressure release hole (111), explosion-proof valve (120) closing cap the one end of pressure release hole (111), mount pad (130) with top cap piece (110) are connected, just mount pad (130) will explosion-proof valve (120) are pressed and are held and fix on top cap piece (110).

2. The header assembly of claim 1, wherein the header assembly (100) further comprises an elastomeric seal ring (140), the elastomeric seal ring (140) being disposed between the explosion-proof valve (120) and the header sheet (110) and extending along a periphery of the pressure relief aperture (111).

3. The top cover assembly according to claim 2, wherein an annular sealing groove (112) is formed in the top cover sheet (110), the annular sealing groove (112) surrounds the pressure relief hole (111), one end of the elastic sealing ring (140) is embedded in the annular sealing groove (112), and the other end of the elastic sealing ring is in circumferential abutting contact with the explosion-proof valve (120).

4. A top cover assembly according to claim 3, wherein an annular mounting groove (113) is provided on the top cover sheet (110), the annular mounting groove (113) encloses the annular sealing groove (112), and the mounting seat (130) is circumferentially embedded in the annular mounting groove (113) and is connected with a groove wall of the annular mounting groove (113).

5. The top cover assembly according to claim 1, wherein the mounting seat (130) is annular, one end of the mounting seat (130) is connected with the top cover sheet (110), the explosion-proof valve (120) is accommodated in the mounting seat (130), a pressing ring wall (131) is arranged on the inner side wall of the mounting seat (130), and the pressing ring wall (131) is adhered to and presses the periphery of the end wall of the explosion-proof valve (120) far away from the top cover sheet (110).

6. The cap assembly of claim 5, wherein the mounting base (130) has a wide mouth end (132) and a narrow mouth end (133), the retaining ring wall (131) is located between the wide mouth end (132) and the narrow mouth end (133), an area surrounded by the wide mouth end (132) is larger than an area surrounded by the narrow mouth end (133), and the wide mouth end (132) is connected with the cap piece (110).

7. The cap assembly of claim 6, wherein the wide mouth end (132) is formed with a connecting skirt (134) circumferentially turned outwardly, and a side of the connecting skirt (134) remote from the narrow mouth end (133) is attached and connected to the cap piece (110).

8. The top cover assembly according to claim 7, wherein an annular mounting groove (113) is formed in the top cover sheet (110), the annular mounting groove (113) surrounds the pressure release hole (111), the connecting skirt (134) is circumferentially embedded in the annular mounting groove (113), and one side of the connecting skirt (134) away from the narrow-mouth end (133) is welded to the bottom wall of the annular mounting groove (113).

9. The cap assembly of claim 1, wherein the explosion proof valve (120) is provided with a thinned score (121).

10. A battery comprising a cap assembly (100) according to any one of claims 1-9.