CN212485425U

CN212485425U - Top cover assembly, battery and battery module

Info

Publication number: CN212485425U
Application number: CN202021083644.9U
Authority: CN
Inventors: 舒宽金; 李开波; 黄利明; 何巍; 刘金成
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-05
Anticipated expiration: 2030-06-12

Abstract

The utility model belongs to the technical field of the battery, a top cap subassembly, battery and battery module are disclosed. The top cover assembly comprises a substrate, a terminal and a sealing structure, wherein a first accommodating hole is formed in the substrate, the substrate is provided with a first side face, the terminal is at least partially arranged in the first accommodating hole, the top face of the terminal is lower than the first side face, or the distance between the top face of the terminal and the first side face is smaller than or equal to a preset height; the sealing structure is arranged in the first accommodating hole and is respectively abutted against the inner wall of the first accommodating hole and the side wall of the terminal. The top surface of the terminal of the top cover assembly is lower than the first side surface, namely the terminal sinks and sinks towards the direction close to the inside of the substrate, or the distance of the top surface of the terminal higher than the first side surface is less than or equal to the preset height, namely the distance of the terminal protruding out of the first side surface of the substrate is within a smaller preset range, the size of the top cover assembly in the height direction is relatively small, the space utilization rate of the battery module is improved, the process is simplified, and the production efficiency is improved.

Description

Top cover assembly, battery and battery module

Technical Field

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

Background

At present, the battery comprises a shell and a cover plate, wherein a positive terminal and/or a negative terminal are arranged on the cover plate, the terminals generally protrude out of the cover plate, and the exposed sizes of different manufacturers are different. The terminal adopts the protrusion to expose the structure, can occupy a partial space of battery module in battery module design, makes battery module inner space not make full use of, reduces battery module space utilization, and battery terminal torsion resistance is little, and the risk of inefficacy is high after long-term vibration.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a top cap subassembly, battery and battery module, the height that its terminal is evagination or evagination is less, has promoted the space utilization of battery.

To achieve the purpose, the utility model adopts the following technical proposal:

a header assembly, comprising:

the substrate is provided with a first accommodating hole and a first side face;

the terminal is at least partially arranged in the first accommodating hole, and the top surface of the terminal is lower than the first side surface of the substrate, or the distance between the top surface of the terminal and the first side surface is less than or equal to a preset height;

the sealing structure is arranged in the first accommodating hole and is respectively abutted against the inner wall of the first accommodating hole and the side wall of the terminal;

the insulating piece is provided with a first avoidance hole for the terminal to pass through;

a spacer disposed between the cap assembly cells.

Preferably, the preset height is 1.5mm to 2.5 mm.

Preferably, the terminal has a rectangular structure or a circular cross-section.

Preferably, the sealing structure is made of one or both of an alumina ceramic sealing material and a glass sealing material.

Preferably, the base plate is provided with a liquid injection hole, the liquid injection hole is spaced apart from the first accommodation hole, and the liquid injection hole penetrates through the base plate.

Preferably, the explosion-proof valve is further included, a second accommodating hole is formed in the substrate, and the explosion-proof valve is arranged in the second accommodating hole.

To achieve the above object, the present invention further provides a battery, which includes a battery case, an opening for placing an electrical core is provided on the battery case, and the battery further includes the above-mentioned top cap assembly, the top cap assembly is connected to the battery case and is plugged into the opening, and a tab of the electrical core is connected to a terminal of the top cap assembly.

Preferably, one of the isolating piece and the top cover component is provided with a buckle, the other one of the isolating piece and the top cover component is provided with a clamping groove, and the buckle is clamped in the clamping groove.

In order to achieve the above object, the present invention further provides a battery module including the above battery.

The utility model has the advantages that:

the utility model provides a top cap subassembly, this top cap subassembly includes the base plate, terminal and seal structure, through be provided with first accommodation hole on the base plate, set up the terminal in first accommodation hole, the top surface of terminal is less than the first side of base plate, the terminal sinks and caves in to the direction that is close to the base plate inside promptly, perhaps the top surface of terminal is higher than the distance less than or equal to of first side and predetermines the height, the distance of the first side of terminal protrusion base plate promptly is within less predetermined range, expose the mode that the protrusion set up with prior art terminal and compare, this top cap subassembly is less relatively in the ascending size of direction of height, not only improve battery module space utilization, the technology has still been simplified, and the production efficiency is improved.

The utility model provides a battery, but top cap assembly's terminal lug of lug in electric core, saved utmost point post, polar plate and utmost point ear connection piece spare part, reduced the inner space that occupies of these spare parts, space utilization is higher, cancels the riveting and the laser welding manufacturing procedure of terminal and utmost point post simultaneously, has saved production time, has improved production efficiency.

The utility model provides a battery module, including foretell battery, the terminal is not evagination or the height of evagination is less, has improved battery module space utilization.

Drawings

Fig. 1 is an exploded schematic view of the header assembly and spacer of the present invention;

fig. 2 is a schematic view of the top cover assembly of the present invention;

fig. 3 is a schematic structural diagram of the battery of the present invention.

In the figure:

1. a cap assembly; 2. a battery case; 3. a spacer;

11. a substrate; 12. a terminal; 13. a sealing structure; 14. an insulating member; 15. an explosion-proof valve; 16. an explosion-proof valve membrane;

111. a first accommodation hole; 112. a liquid injection hole; 113. a second accommodation hole;

141. a first avoidance hole; 142. a second avoidance hole; 143. a third avoidance hole; 144. a card slot;

31. buckling; 32. and (6) a via hole.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without 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 in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. 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. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present embodiment provides a cap assembly 1, where the cap assembly 1 includes a substrate 11, a terminal 12, and a sealing structure 13, where the substrate 11 and the terminal 12 are formed by die stamping and cold working, and the operation is simple and easy to implement. The overall shape of the substrate 11 is a rectangular structure, the substrate 11 plays a role of overall support, a first accommodating hole 111 is formed in the substrate 11, and the substrate 11 has a first side surface, i.e., a top surface of the substrate 11. The terminal 12 is at least partially disposed in the first accommodation hole 111, and a top surface of the terminal 12 is lower than the first side surface of the substrate 11, or a distance between the top surface of the terminal 12 and the first side surface is less than or equal to a predetermined height, so as to reduce an exposed size of the terminal 12 relative to the substrate 11. The sealing structure 13 is disposed in the first accommodation hole 111 and abuts against an inner wall of the first accommodation hole 111 and a sidewall of the terminal 12, respectively, and the sealing structure 13 performs a sealing function and an insulating function. It is understood that the terminal 12 may be a positive terminal 12 or a negative terminal 12.

The top cap assembly 1 provided by the embodiment, the top cap assembly 1 includes a substrate 11, a terminal 12 and a sealing structure 13, a first accommodating hole 111 is formed in the substrate 11, the terminal 12 is disposed in the first accommodating hole 111, the top surface of the terminal 12 is lower than the first side surface of the substrate 11, namely, the terminal 12 sinks and recesses toward the direction close to the inside of the substrate 11, or the distance from the top surface of the terminal 12 to the first side surface is less than or equal to a preset height, namely, the distance from the terminal 12 to the first side surface of the substrate 11 is within a smaller preset range, compared with the terminal exposing and protruding mode in the prior art, the size of the top cap assembly 1 in the height direction is relatively smaller, the space utilization rate of a battery module is increased, the process is simplified, and the production efficiency is.

Wherein, predetermine the height specifically for 1.5mm ~ 2.5mm, the preferred height of predetermineeing of this embodiment is 2mm to guarantee that terminal 12 protrudes the size of base plate 11 and is little enough, realized almost not having terminal 12 and exposed the design, reduce the space that terminal 12 occupy the battery module, make battery module inner space can make full use of.

Preferably, the bottom of the terminal 12 does not protrude from one side of the top cap assembly 1 near the inside of the battery, so as to reduce the space occupied by the terminal 12 in the battery case, and further improve the space utilization.

Further, as shown in fig. 1-2, the cross section of the terminal 12 is a rectangular structure or a circular shape, and both the first receiving hole 111 of the substrate 11 and the sealing structure 13 are adapted to the external dimension of the terminal 12, specifically, the first receiving hole 111 of the substrate 11 is preferably a rectangular hole structure, but not limited to a rectangular structure, and the sealing structure 13 is preferably a rectangular ring structure, but not limited to a rectangular structure, such that the outer wall of the sealing structure 13 abuts against the inner wall of the first receiving hole 111, and the inner wall of the sealing structure 13 abuts against the outer wall of the terminal 12. The cross section of the terminal 12 is of a rectangular structure, so that the torsion resistance of the terminal 12 is improved, the long-term reliability of the battery is guaranteed, and the risk of failure caused by looseness of the terminal 12 after vibration of the vehicle is reduced.

Further, the sealing structure 13 is made of either or both of an alumina ceramic sealing material and a glass sealing material, which are formed by heating and curing in a powder state. Specifically, when the cap assembly 1 is sealed, the substrate 11 and the terminal 12 are placed in a mold, alumina ceramic powder or glass sealing powder is added, and the mixture is placed in a high-temperature furnace to be heated, so that the powders are cured and bonded, and the sealing performance between the terminal 12 and the substrate 11 is realized, and the sealing effect is good.

In order to further ensure the sealing and insulating effects, as shown in fig. 1, the cap assembly 1 further includes an insulating member 14, the overall structure of the insulating member 14 is preferably a rectangular structure, but is not limited to a rectangular structure, the size of the insulating member 14 is slightly smaller than that of the substrate 11, the insulating member 14 is disposed on one side of the substrate 11 away from the first side, and the terminal 12 is disposed through the insulating member 14 for isolation and insulation of the terminal 12. Specifically, the first avoiding hole 141 is formed in the insulating member 14, the terminal 12 penetrates through the first avoiding hole 141, the first avoiding hole 141 has an effect of avoiding the terminal 12, and meanwhile, the inner wall of the first avoiding hole 141 abuts against the side wall of the terminal 12, so that the insulating effect is good. The insulating member 14 is made of plastic through an injection molding process, so the insulating member 14 can also be referred to as a lower plastic, and it is understood that the insulating member 14 is not limited to plastic, but can also be an insulating film.

Furthermore, a liquid injection hole 112 is formed in the substrate 11, the liquid injection hole 112 is used for introducing an electrolyte, the liquid injection hole 112 is spaced from the first accommodating hole 111, and the liquid injection hole 112 penetrates through a side of the substrate 11 away from the first side surface. Meanwhile, a second avoiding hole 142 is formed in the insulating member 14 corresponding to the injection hole 112, and the second avoiding hole 142 is communicated with the injection hole 112, so that the electrolyte flows out of the second avoiding hole 142 through the injection hole 112.

Further, as shown in fig. 1 to 2, the cover assembly 1 further includes an explosion-proof valve 15, a second receiving hole 113 is formed in the base plate 11, and the explosion-proof valve 15 is disposed in the second receiving hole 113. Meanwhile, a third avoiding hole 143 is formed in the insulating member 14 corresponding to the second receiving hole 113, and the third avoiding hole 143 is used for avoiding the explosion-proof valve 15. Optionally, the explosion-proof valve 15 is manufactured through module stamping and cold machining, the operation is simple, the realization is easy, the explosion-proof valve 15 and the second accommodating hole 113 are connected in a welding mode, the connection effect is good, and the structure is stable. It is understood that the explosion-proof valve membrane 16 may not be provided on the outer side of the explosion-proof valve 15, and the explosion-proof valve membrane 16 may be provided on the outer side of the explosion-proof valve 15. Preferably, the explosion-proof valve 15 is covered with an explosion-proof valve membrane 16 at the outer side thereof, and the explosion-proof valve membrane 16 functions to protect the explosion-proof valve 15. Optionally, the explosion-proof valve membrane 16 is manufactured by die cutting or laser die cutting, the processing process is simple, and the production cost is low.

The manufacturing and assembling processes of the cap assembly 1 provided in the present embodiment are as follows:

respectively manufacturing the substrate 11, the terminal 12 and the explosion-proof valve 15 by module stamping and cold processing, manufacturing the insulating part 14 by an injection molding process, and manufacturing an explosion-proof valve film 16 by die cutting or laser die cutting;

putting the terminal 12 and the substrate 11 into a mold, adding alumina ceramic powder or special glass powder, and then putting into a high-temperature furnace for heating to solidify and bond the powder, so as to realize the sealing between the terminal 12 and the substrate 11;

after the terminal 12 and the substrate 11 are sealed, the explosion-proof valve 15 is welded into the second accommodating hole 113 of the substrate 11, then the insulating member 14 is installed on the side of the substrate 11 away from the first side surface, then the explosion-proof valve film 16 covers the explosion-proof valve 15, and finally the qualified top cover assembly 1 is packaged.

The embodiment also provides a battery, as shown in fig. 2-3, the battery includes a battery case 2 and the above-mentioned cap assembly 1, an opening for installing a battery core is provided on the battery case 2, a containing space for containing the battery core is provided in the battery case 2, the cap assembly 1 is connected with the battery case 2 and is sealed in the opening to form an integral structure, a tab of the battery core is connected with a terminal 12 of the cap assembly 1, and the terminal 12 and the tab are preferably connected by welding.

The battery that this embodiment provided, but terminal 12 lug in electric core of top cap subassembly 1 has saved utmost point post, polar plate and utmost point ear connection piece spare part, has reduced the inner space that occupies of these spare parts, and space utilization is higher, cancels the riveting and the laser welding manufacturing procedure of terminal 12 and utmost point post simultaneously, has saved production time, has improved production efficiency.

In order to ensure the insulation effect between the top cover assembly 1 and the battery shell 2, as shown in fig. 1, the battery further comprises a spacer 3, the overall appearance of the spacer 3 is a rectangular structure, a through hole 32 is arranged on the spacer 3, and a tab of a battery cell passes through the through hole 32 and is connected to the terminal 12. The separator 3 sets up between top cap subassembly 1 and electric core, and the separator 3 adopts insulating material to make, through setting up separator 3, keeps apart and insulating effectual. Specifically, the top cover assembly 1 and the spacer 3 are separately packaged, and when the battery is assembled, the terminal 12 of the top cover assembly 1 is welded to the tab of the battery cell, and then the spacer 3 is mounted between the top cover assembly 1 and the battery cell.

In order to ensure the structural stability of the spacer 3, optionally, one of the side of the spacer 3 close to the first side surface and the top cover assembly 1 is provided with a buckle 31, and the other is provided with a clamping groove 144, and the buckle 31 is clamped in the clamping groove 144. This embodiment is preferred, is provided with buckle 31 respectively at the both ends of separator 3, is provided with draw-in groove 144 respectively at the both ends of the insulating part 14 of top cap subassembly 1, and a buckle 31 joint is in rather than corresponding draw-in groove 144 to realize fixing between separator 3 and the insulating part 14, fixed effectual, guaranteed overall structure's connection stability. It can be understood that, since the partition 3 is not provided with a avoiding structure for the liquid injection hole 112, the partition 3 and the insulating member 14 can be arranged at intervals, so that the partition 3 can be effectively avoided when the liquid injection hole 112 is injected.

The embodiment also provides a battery module which comprises the battery, the height of the terminal 12 which does not protrude outwards or protrudes outwards is smaller, and the space utilization rate of the battery module is improved.

In the description herein, it is to be understood that the terms "upper", "lower", "right", 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 do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

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

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A header assembly, comprising:

a substrate (11) having a first receiving hole (111) provided in the substrate (11), the substrate (11) having a first side surface;

the terminal (12) is at least partially arranged in the first accommodating hole (111), the top surface of the terminal (12) is lower than the first side surface of the substrate (11), or the distance between the top surface of the terminal (12) and the first side surface is smaller than or equal to a preset height;

a seal structure (13) which is provided in the first accommodation hole (111) and which is in contact with the inner wall of the first accommodation hole (111) and the side wall of the terminal (12), respectively;

the insulating piece (14), the insulating piece (14) is arranged on one side of the substrate (11) far away from the first side face, and a first avoidance hole (141) for the terminal (12) to pass through is formed in the insulating piece (14);

the separator (3), the separator (3) set up in between the top cap subassembly (1) electricity core.

2. The header assembly of claim 1, wherein the predetermined height is between 1.5mm and 2.5 mm.

3. Cap assembly according to claim 1, wherein the terminal (12) has a rectangular or circular cross-section.

4. The cap assembly of claim 1, wherein the sealing structure (13) is made of either or both of an alumina ceramic sealing material and a glass sealing material.

5. A top cap assembly according to any of claims 1 to 4, wherein a pour hole (112) is provided in the base plate (11), the pour hole (112) being spaced from the first receiving aperture (111), and the pour hole (112) extending through the base plate (11).

6. The cap assembly according to any one of claims 1 to 4, further comprising an explosion-proof valve (15), wherein a second receiving hole (113) is provided in the base plate (11), and wherein the explosion-proof valve (15) is provided in the second receiving hole (113).

7. A battery comprising a battery casing (2), wherein an opening for placing a battery cell is provided on the battery casing (2), and characterized by further comprising a cap assembly (1) according to any one of claims 1-6, wherein the cap assembly (1) is connected to the battery casing (2) and is sealed at the opening, and a tab of the battery cell is connected to a terminal (12) of the cap assembly (1).

8. The battery according to claim 7, characterized in that one of the spacer (3) and the top cover assembly (1) is provided with a snap (31) and the other is provided with a snap groove (144), and the snap (31) is snapped in the snap groove (144).

9. A battery module comprising the battery according to any one of claims 7 to 8.