CN217589177U

CN217589177U - Top cover assembly and battery

Info

Publication number: CN217589177U
Application number: CN202220749040.6U
Authority: CN
Inventors: 吴迪; 李开波; 何巍; 刘金成
Original assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Current assignee: Huizhou Eve Power Battery Co ltd; Hubei Eve Power Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-10-14
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to a top cap subassembly and battery, wherein, top cap subassembly includes top cap piece and lower plastic, and one side of plastic under the top cap piece setting, top cap piece include first body, are provided with the stiffening rib on the first body, and the stiffening rib is cyclic annular setting in the week portion of first body, and the position that a side of plastic corresponds the stiffening rib under the top cap piece deviates from is provided with first recess, and lower plastic includes the second body, corresponds the stiffening rib on the second body and is provided with the second recess, and the stiffening rib setting is in the second recess. The top cover sheet of the top cover assembly can be designed to be thinner, thereby reducing the weight of the top cover assembly. The lower plastic is provided with a second groove corresponding to the reinforcing rib, and the reinforcing rib can be accommodated in the second groove, so that the structure is more compact. The first groove and the reinforcing rib are matched to form a positioning structure, and the assembly efficiency of the top cover assembly can be improved.

Description

Top cover assembly and battery

Technical Field

The utility model relates to a battery technology field especially relates to a top cap subassembly and battery.

Background

The power battery is a core component of a new energy automobile, and along with the rapid development of the new energy automobile industry in China, the requirement on the power battery is higher and higher, so that how to further improve the energy density of the power battery and reduce the cost of the power battery is a problem of key attention of a power battery manufacturer.

The top cover assembly is an indispensable part of the battery, and the weight of the top cover assembly is reduced, so that the proportion of the weight of a cell in the battery is increased, and the effective method for improving the energy density of the battery is provided. The following problems exist with current roof assemblies: 1. the top flap is thicker, resulting in a heavier weight top flap and hence the overall weight of the top lid assembly; 2. the top cover sheet is too thin, resulting in a lower strength of the top cover sheet and a tendency to fracture; 3. the local outward protrusion of the top cover sheet increases the assembly difficulty of the top cover assembly.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: provided is a head cover assembly which is light in weight and high in assembly efficiency.

The embodiment of the utility model provides a another aim at: a battery having high assembly efficiency and high energy density is provided.

To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:

the first aspect provides a top cover assembly, including top cover plate and lower plastic, the top cover plate sets up one side of plastic down, the top cover plate includes first body, be provided with the stiffening rib on the first body, the stiffening rib is cyclic annular setting and is in the week portion of first body, the top cover plate deviates from down a side of plastic corresponds the position of stiffening rib is provided with first recess, the plastic includes the second body down, it is provided with the second recess to correspond on the second body the stiffening rib, the stiffening rib sets up in the second recess.

As a preferred scheme of the top cover assembly, the patch is arranged on a side surface of the top cover sheet, which is away from the lower plastic, and the patch covers the first groove.

As a preferred scheme of the top cover component, the thickness of the top cover sheet is D, and D is less than or equal to 2mm.

As a preferred scheme of top cap subassembly, the relative both ends of second body set up the supporting legs, and part the second recess sets up on the supporting legs.

As a preferred scheme of the top cover assembly, a first supporting rib is arranged in the supporting leg, and the reinforcing rib abuts against the first supporting rib.

As a preferable scheme of the top cover assembly, a ventilation groove is concavely formed in the second body, a second support rib is arranged in the ventilation groove, and the top cover sheet is abutted against the second support rib.

As a preferable mode of the top cover assembly, one end of the second support rib near the top cover sheet is provided with a notch.

As an optimal scheme of the top cover assembly, the top cover assembly further comprises a pole and a connecting piece, the pole is arranged between the top cover piece and the lower plastic, the connecting piece is arranged on one side, deviating from the top cover piece, of the lower plastic, a through hole is formed in the lower plastic, the connecting piece is provided with a first protrusion, and the first protrusion penetrates through the through hole and is connected with the pole.

As a preferred scheme of the top cover assembly, a second protrusion is arranged at a position, corresponding to the second groove, of one side face, deviating from the top cover plate, of the second body, the second protrusion surrounds the second groove to form a third groove, and the connecting piece is arranged in the third groove.

In a second aspect, a battery is provided, which includes a casing, an electric core and the above cap assembly, wherein the electric core is disposed in the casing, and the cap assembly is disposed at an opening of the casing.

The embodiment of the utility model provides a beneficial effect does: the reinforcing ribs are arranged on the first body and are annularly arranged at the periphery of the top cover plate, so that the strength and rigidity of the top cover plate are improved, and the top cover plate is not easy to deform and break. The position that a side of plastic corresponds the stiffening rib under the top cover piece deviates from sets up first recess for thereby this top cover piece can not form local thickening increase weight because of setting up the stiffening rib, consequently can design the thickness of this top cover piece thinner, thereby alleviates the weight of top cover piece, and then reduces top cap assembly's whole weight. In addition, a second groove is formed in the lower plastic, the second groove can accommodate the reinforcing rib, so that the structure is more compact, when the top cover assembly is installed, the reinforcing rib and the second groove are matched to form a positioning structure, and the assembling efficiency of the top cover assembly is improved.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a schematic view of a first viewing angle structure of a top cover assembly according to an embodiment of the present invention.

Fig. 2 is a disassembly schematic view of the top cover assembly according to the embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion a of fig. 2.

Fig. 4 is a cross-sectional view of a cap assembly in accordance with an embodiment of the present invention.

Fig. 5 is a partial enlarged view of fig. 4 at B.

Fig. 6 is a schematic view of a second perspective structure of the top cap assembly according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a battery according to an embodiment of the present invention.

In the figure:

100. a housing;

1. a top cover sheet; 11. a first body; 12. reinforcing ribs; 13. a first groove; 2. plastic is arranged; 21. a second body; 22. a second groove; 23. supporting legs; 231. a first support rib; 24. a ventilation groove; 241. a second support rib; 2411. a notch; 242. air holes are formed; 25. a through hole; 26. a second protrusion; 3. pasting a piece; 4. a pole column; 5. connecting sheets; 51. a first protrusion; 52. a fuse hole; 6. an explosion-proof valve.

Detailed Description

In order to make the technical problems, the adopted technical solutions and the achieved technical effects of the present invention clearer, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 5, the top cover assembly of the present invention comprises a top cover plate 1, a lower plastic 2, a patch 3, a pole 4 and a connecting sheet 5. Wherein, top cover plate 1 sets up in plastic 2 one side down, and top cover plate 1 includes first body 11, is provided with stiffening rib 12 on the first body 11, and stiffening rib 12 is cyclic annular setting in the week of first body 11, and the position that a side of top cover plate 1 deviates from plastic 2 down corresponds stiffening rib 12 is provided with first recess 13, and lower plastic 2 includes second body 21, corresponds stiffening rib 12 on the second body 21 and is provided with second recess 22, and stiffening rib 12 sets up in second recess 22. By providing the reinforcing ribs 12 on the first body 11, the reinforcing ribs 12 are provided in a ring shape at the periphery of the top sheet 1, the strength and rigidity of the top sheet 1 are improved, and the top sheet 1 is not easily deformed and broken. One side of the top cover sheet 1 deviating from the lower plastic 2 corresponds to the reinforcing rib 12 and is provided with the first groove 13, so that the top cover sheet 1 cannot be locally thickened due to the arrangement of the reinforcing rib 12, the thickness of the top cover sheet 1 can be designed to be thinner, the weight of the top cover sheet 1 is reduced, and the whole weight of the top cover assembly is reduced. In addition, the lower plastic 2 is provided with the second groove 22 to arrange the reinforcing rib 12 in the second groove 22, so that the structure is more compact, the overall height of the roof assembly is reduced, and when the roof assembly is installed, the reinforcing rib 12 and the second groove 22 are matched to form a positioning structure, and the assembly efficiency of the roof assembly is improved.

In the embodiment, the thickness D of the top cover sheet 1 is less than or equal to 2mm, the thickness of the top cover sheet 1 with the thickness is thinner than that of the existing top cover sheet 1, the weight is lighter, and the top cover sheet 1 in the thickness range also has higher strength and rigidity due to the arrangement of the reinforcing ribs 12 on the top cover sheet 1.

Preferably, the reinforcing rib 12 is formed by stamping the top cover plate 1, so that one end face of the reinforcing rib 12 is in a convex and the other end face is in a concave structure, and the stamping process is simple, thereby being beneficial to the production and the manufacture of the top cover plate 1.

Preferably, the top sheet 1 is made of aluminum metal or aluminum alloy material, which is light and can reduce the overall weight of the top sheet 1.

Specifically, as shown in fig. 2, the patch 3 is a planar structure, and the patch 3 is disposed on a side surface of the top cover plate 1 away from the lower plastic 2, and the patch 3 can completely cover the first groove 13, so that the top cover assembly is located on the side surface and is a planar structure, which is attractive in appearance, and the planar structure does not occupy the installation space of the battery cell, thereby improving the energy density of the battery.

In this embodiment, as shown in fig. 2 and 5, support legs 23 are disposed at two opposite ends of the second body 21, one end of each support leg 23, which is far away from the second body 21, abuts against a battery cell of the battery to realize insulation between the lower plastic 2 and the battery cell, and part of the second grooves 22 are disposed on the support legs 23, so that the support legs 23 can also accommodate the reinforcing ribs 12, and the enabling structure is more compact.

Specifically, a first supporting rib 231 is provided in the supporting leg 23, and the first supporting rib 231 abuts against the reinforcing rib 12 to improve the supporting force of the supporting leg 23 on the reinforcing rib 12, thereby improving the connection stability of the top cover plate 1 and the lower plastic 2. In this embodiment, a plurality of first support ribs 231 are provided at intervals in the support leg 23, and the first support ribs 231 are all abutted against the reinforcing ribs 12, thereby further improving the supporting force of the support leg 23 to the top sheet 1.

In this embodiment, as shown in fig. 2 and 3, the second body 21 is provided with the ventilation groove 24, the bottom of the ventilation groove 24 is provided with a plurality of ventilation holes 242 at intervals, the top cover plate 1 is provided with explosion-proof holes corresponding to the ventilation groove 24, the explosion-proof holes are provided with the explosion-proof valves 6, when the air pressure in the battery is increased, the air can be sprayed to the explosion-proof valves 6 from the ventilation holes 242, and when the explosion-proof valves 6 are impacted by the set air pressure, the explosion-proof valves 6 are broken to release the pressure, thereby preventing the battery from exploding. The weight of the lower plastic 2 can be reduced by arranging the ventilation groove 24; the plurality of air holes 242 are arranged at the bottom of the air permeable groove 24 to form a mesh shape, so that air leakage is facilitated, and meanwhile, the sprayed objects can be blocked, and the risk of splashing of the sprayed objects after the explosion of the explosion-proof valve 6 is reduced.

Specifically, the second support rib 241 is arranged in the ventilation groove 24, and the top cover plate 1 is abutted against the second support rib 241, on one hand, the ventilation groove 24 is arranged in the middle of the lower plastic 2, so that the middle of the lower plastic 2 becomes a weak area and is easy to break, and the area of the ventilation groove 24 can be reinforced by arranging the second support rib 241, so that the lower plastic 2 is prevented from breaking; on the other hand, the second support rib 241 may support the top cover sheet 1, improving stability between the lower plastic 2 and the top cover sheet 1. In this embodiment, the second support ribs 241 are arc-shaped, two second support ribs 241 are arranged in the ventilation groove 24 in an opposite direction and at intervals, and two opposite ends of the second support ribs 241 are respectively connected with the groove wall of the ventilation groove 24, so that the two second support ribs 241 are connected with the groove wall of the ventilation groove 24 to form an elliptical ring-shaped support ring. In other embodiments, the second support rib 241 is rectangular or has another shape, or a plurality of support plates may be arranged at intervals on the second support rib 241, which is not limited to this embodiment.

Specifically, the air holes 242 are formed in the inner and outer portions of the support ring, and thus a gap 2411 is formed at one end of the second support rib 241 adjacent to the top cover plate 1, so that the gas generated in the outer and inner portions of the support ring can flow through the gap 2411, thereby smoothly discharging the gas generated in the inner portion of the battery to the explosion-proof valve 6.

In this embodiment, as shown in fig. 2, the terminal 4 is disposed between the top cover plate 1 and the lower plastic 2, the connecting sheet 5 is disposed on one side of the lower plastic 2 departing from the top cover plate 1, the lower plastic 2 is provided with a through hole 25, the connecting sheet 5 is provided with a first protrusion 51, and the first protrusion 51 penetrates through the through hole 25 to be connected with the terminal 4. The first protrusion 51 is provided on the connecting sheet 5 to facilitate the electrical connection between the terminal post 4 and the connecting sheet 5.

Preferably, the first projection 51 is formed by stamping the connecting piece 5, and the first projection 51 formed by stamping has high strength without increasing the weight of the connecting piece 5. And a side surface of the first protrusion 51 departing from the pole 4 is of a groove structure, and the groove structure is beneficial to welding the connecting sheet 5 and the pole 4.

As shown in fig. 2, the connecting piece 5 includes a positive connecting piece and a negative connecting piece, the positive connecting piece is connected with the positive pole, and the negative connecting piece is connected with the positive pole. The positive connecting piece is provided with a fusing hole 52, so that a local weak area is formed on the connecting piece 5, in other words, a fusing part is formed between the hole wall of the fusing hole 52 and the edge of the connecting piece 5, and when the current of the battery is overlarge, the fusing part is firstly fused, so that the whole circuit is powered off, and the battery is prevented from exploding. In this embodiment, the fuse holes 52 are arc-shaped, and two fuse holes 52 are provided, and the two fuse holes 52 are spaced apart from each other at the outer peripheral portion of the first protrusion 51.

Specifically, as shown in fig. 2 and fig. 6, a second protrusion 26 is arranged at a position, corresponding to the second groove 22, of one side surface of the second body 21 departing from the top cover plate 1, the design is not only free from local thinning of the region where the second groove 22 is arranged on the lower plastic 2, but also can strengthen the lower plastic 2 integrally, the second protrusion 26 surrounds and forms a third groove, the connecting sheet 5 is arranged in the third groove, and the second protrusion 26 and the connecting sheet 5 are not overlapped, so that the energy density of the battery is prevented from being reduced due to the fact that the occupied space of the top cover component on the lower plastic 2 is increased due to the second protrusion 26.

Preferably, two opposite sides of the connecting piece 5 are attached to the second protrusions 26, so that the second protrusions 26 can position the connecting piece 5, which facilitates quick installation of the connecting piece 5.

The utility model discloses still disclose a battery, obtain the top cap subassembly including casing 100, electric core and the arbitrary embodiment of the aforesaid, electric core setting is in casing 100, and the top cap subassembly sets up at casing 100's opening part, and this top cap subassembly's top sheet 1 is through setting up stiffening rib 12 to design the thickness of top sheet 1 thinner, light in weight, the battery of using this top cap subassembly can account for the weight of electric core than higher, thereby improves battery energy density.

The utility model discloses still disclose the assembly method of a battery, concrete step is as follows:

s100, welding or riveting the top cover plate 1, the pole 4 and the explosion-proof valve 6 to form a semi-finished product;

s200, assembling the semi-finished product obtained in the step S100 with the lower plastic 2, and inserting the reinforcing ribs 12 of the top cover sheet 1 into the second grooves 22 of the lower plastic;

s300, enabling the first protrusion 51 of the connecting sheet 5 to penetrate through the through hole 25 and be welded with the pole 4 to form a top cover assembly;

s400, laser welding a battery cell lead-out tab and a connecting sheet 5 of a top cover assembly;

s500, arranging the top cover assembly into the shell 100, and performing laser welding sealing on the shell 100 and the top cover assembly;

s600, wrapping the side face and the bottom face of the shell 100 with an insulating blue film;

s700, arranging the patch 3 on the top of the top cover sheet 1.

The battery assembly is completed through the steps, the steps are simple, the assembly efficiency is high, and the sealing performance of the battery is good.

In the description herein, it is to be understood that the terms "upper", "lower", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the description herein, references to "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In the description, schematic representations of the above terms do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive step, and these embodiments are all intended to fall within the scope of the present invention.

Claims

1. The top cover assembly is characterized in that the top cover piece comprises a first body, reinforcing ribs are arranged on the first body, the reinforcing ribs are annularly arranged on the periphery of the first body, the top cover piece deviates from one side face of the lower plastic and corresponds to the positions of the reinforcing ribs, first grooves are formed in the positions of the reinforcing ribs, the lower plastic comprises a second body, the second body corresponds to the reinforcing ribs, and the reinforcing ribs are arranged in the second grooves.

2. The header assembly of claim 1, further comprising a patch disposed on a side of the header sheet facing away from the lower plastic, the patch covering the first recess.

3. The lid assembly of claim 1, wherein the thickness of the lid sheet is D ≦ 2mm.

4. The header assembly of claim 1, wherein the second body defines support feet at opposite ends thereof, and wherein a portion of the second recess is defined in the support feet.

5. The header assembly of claim 4, wherein a first support rib is disposed within the support foot, the reinforcement rib abutting against the first support rib.

6. The top cap assembly of claim 1, wherein the second body is recessed with a vent slot, wherein a second support rib is disposed in the vent slot, and the top cap sheet abuts against the second support rib.

7. The lid assembly of claim 6, wherein the second support rib is notched proximate to an end of the top flap.

8. The top cover assembly according to claim 1, further comprising a pole and a connecting piece, wherein the pole is arranged between the top cover piece and the lower plastic, the connecting piece is arranged on one side of the lower plastic, which is away from the top cover piece, a through hole is formed in the lower plastic, a first protrusion is arranged on the connecting piece, and the first protrusion penetrates through the through hole to be connected with the pole.

9. The top cap assembly of claim 8, wherein a second protrusion is disposed on a side of the second body facing away from the top cover piece corresponding to the second groove, the second protrusion encloses a third groove, and the connecting piece is disposed in the third groove.

10. A battery comprising a casing (100) and a cell, characterized in that it further comprises a cap assembly according to any one of claims 1 to 9, the cell being disposed within the casing, the cap assembly being disposed at an opening of the casing.