CN218849631U

CN218849631U - Cover plate assembly and battery

Info

Publication number: CN218849631U
Application number: CN202223250453.9U
Authority: CN
Inventors: 程园芳; 王永光; 王俊朋
Original assignee: Gree Altairnano New Energy Inc
Current assignee: Gree Altairnano New Energy Inc
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-04-11
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses an apron subassembly, including apron body and bearing structure, be provided with on the apron body and annotate the liquid hole, bearing structure is provided with the interval with annotating the liquid hole, and bearing structure sets up with annotating the liquid hole relatively, installs sealed glue nail on annotating the liquid hole, and bearing structure is used for the sealed glue nail that drops on the bearing annotates the liquid hole. A battery is also provided. The utility model provides a bearing structure is seted up to apron subassembly and battery inboard at apron body, and bearing structure and sealed nail combined action guarantee the leakproofness of battery, can fill the helium of sufficient volume and be convenient for leak detection, guarantee the degree of accuracy that the helium leaks hunting behind the battery seal, avoided gas leakage battery to flow into the possibility of lower workshop section, improved production quality and production efficiency.

Description

Cover plate assembly and battery

Technical Field

The utility model relates to a technical field of battery, in particular to apron subassembly and battery.

Background

The lithium battery has the advantages of high energy density, high power density, multiple recycling times and the like, is widely applied to equipment such as smart phones, wearable equipment, electric bicycles, new energy automobiles and the like, and becomes a key for solving global problems such as energy crisis, environmental pollution and the like; with the increasingly improved technology of electric automobiles, electric automobiles and hybrid automobiles are closer to the daily life of people, and have huge business opportunities, and meanwhile, the electric automobiles provide higher requirements for the performance of lithium ion batteries for providing energy for the electric automobiles.

The cover plate assembly of the power battery and the battery comprise a shell and a cover plate, a liquid injection port of the cover plate is usually arranged to be a through hole, the liquid injection port is not sealed to be injected once after the shell and the cover plate are welded and fixed, the liquid injection port is inserted into a glue nail to operate to a standing area to stand after the liquid injection is completed once, the glue nail is pulled out after the standing time is over to be injected secondarily, the liquid injection port is inserted into the glue nail to be stood at high temperature after the liquid injection is completed, the glue nail is pulled out to be subjected to high temperature formation after the standing is completed, the glue nail or a steel ball is inserted into the liquid injection port after the formation is completed, and the end face of the liquid injection port is cleaned and welded and sealed finally.

The cover plate assembly is used as an important component of the power battery, and comprises a cover plate body, a positive pole post and a negative pole post, wherein a liquid injection hole needs to be sealed by a sealing rubber nail after the battery liquid injection is finished; the sealing rubber nail is a high molecular static sealing material which is viscous liquid at normal temperature, is convenient to coat and is easy to fill a gap between two joint surfaces, a uniform and stable continuous film with viscosity, viscoelasticity or strippability is formed after a period of time after coating, and the sealing rubber nail plays a role in sealing by means of filling the film and fastening a screw. However, the sealing nails of the lithium battery may fall into the electrolyte when the welding is not good, thereby causing the leakage of the battery.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a apron subassembly and battery to during the sealed staple of solving the lithium cell can fall into electrolyte when the welding is bad, therefore caused the technical problem of battery weeping.

In order to achieve the above object, the specific technical solution of the cover plate assembly and the battery of the utility model is as follows:

the utility model provides an apron subassembly, including apron body and bearing structure, be provided with on the apron body and annotate the liquid hole, bearing structure is provided with the interval with annotating the liquid hole, and bearing structure sets up with annotating the liquid hole relatively, installs the sealed nail of gluing on annotating the liquid hole, and the bearing avoids dropping when bearing structure is used for sealed nail of gluing to drop.

As the utility model provides a preferred embodiment is provided with the casing on the apron body, and the inside of casing holds electrolyte, and bearing structure sets up the surface at the apron body that is close to electrolyte one side.

As the utility model provides a preferred embodiment, bearing structure and apron body pass through fusion welded fastening.

As a preferred embodiment of the present invention, the support structure is made of pure aluminum material.

As the utility model provides a preferred embodiment, the bearing structure includes the fixed plate, is provided with the connecting rod on the fixed plate, connecting rod and apron body fixed connection.

As the utility model provides a preferred embodiment, fixed plate and apron body parallel arrangement to make and annotate the sealed glue nail on the liquid mouth and drop to the fixed plate on.

As the utility model provides a preferred embodiment, the fixed plate sets up with annotating the liquid hole with one heart to make the center department that the sealed glue nail can drop the fixed plate.

As the utility model provides a preferred embodiment, the connecting rod includes a plurality ofly, and a plurality of connecting rods set up the summit at the inscribe regular polygon of circular fixed plate.

As the utility model provides a preferred embodiment, the interval between fixed plate and the apron body is greater than the length of sealed glue nail.

The utility model also provides a battery, include as above the apron subassembly.

The utility model discloses a apron subassembly and battery have following advantage:

the utility model provides a bearing structure is seted up to apron subassembly and battery inboard at apron body, and bearing structure and sealed nail combined action guarantee the leakproofness of battery, can fill the helium of sufficient volume and be convenient for leak detection, guarantee the degree of accuracy that the helium leaks hunting behind the battery seal, avoided gas leakage battery to flow into the possibility of lower workshop section, improved production quality and production efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the cover plate assembly of the present invention;

fig. 2 is a side view of the cover plate assembly of the present invention;

fig. 3 is a schematic view of a part of the structure of the cover plate body of the present invention;

fig. 4 is a schematic view of a part of the cover plate assembly according to the present invention.

Description of reference numerals: 1. a cover plate body; 2. a positive post; 3. an explosion-proof valve; 4. a liquid injection hole; 5. a negative pole post; 6. a support structure; 61. a fixing plate; 62. a connecting rod.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The utility model provides a cover plate assembly, including casing and apron body 1, casing and the connection of apron 1 detachable of body, be provided with on the apron body 1 and annotate the liquid structure, annotate the structural notes liquid mouth that is provided with of liquid, annotate the liquid structure and receive external drive in order to open or close and annotate the liquid mouth. Through the liquid injection structure of one-way conduction to make the liquid injection structure just can promote under the exogenic action, annotate the liquid structure and will annotate liquid mouth automatic closure when exogenic force disappears, with the process of reduction product in the manufacturing process, reduction in production cost improves product quality and production efficiency, gets rid of the unsafe factor in the battery manufacturing, realizes that apron subassembly and battery case are inside completely isolated with the external world.

Further, the casing has the opening, makes things convenient for splendid attire electrolyte and quick electric core and relevant accessory of packing into, and the edge of opening part sets up the lug, when apron body 1 lock is on the casing for apron body 1 is packed into and is carried on spacingly in the casing, so that apron body 1's terminal surface and casing opening parallel and level.

As a preferred embodiment, the shape of the housing may be cylindrical, square or other shape, and the shape of the housing is not particularly limited herein.

As shown in fig. 1, the cover plate comprises a cover plate body 1, an explosion-proof valve 3 is arranged on the upper surface of the cover plate body 1, the explosion-proof valve automatically explodes when the internal pressure of the shell reaches a limit value, a mounting hole is formed in one side of the explosion-proof valve 3, a liquid injection structure is fixed on the mounting hole, the liquid injection structure is a unique channel for gas-liquid exchange between the interior of the shell and the exterior of the shell, and the liquid injection structure is used for injecting electrolyte and exhausting and can be automatically closed.

Further, one side of annotating the liquid structure is provided with utmost point post, and utmost point post draws the outside positive and negative electrode of casing for electric core, and utmost point post includes positive post 2 and negative pole post 5, and the edge of utmost point post is provided with the insulating cement, and the insulating cement is in order to guarantee the insulation and the sealing of utmost point post and main part. The opposite both sides of lower surface of main part are provided with utmost point ear connecting block, and utmost point ear connecting block is used for drawing forth electric core utmost point ear, and one end is connected with utmost point post. One side of the tab connecting block is provided with an insulating plate which ensures that the tab connecting block is insulated and sealed with the main body.

The utility model provides a sealed glue nail is a polymer static seal material, is thick liquid under the normal atmospheric temperature, and the coating is convenient, fills the clearance between two composition surfaces easily, forms an even, stable continuous film that has viscidity, viscoelasticity or can peel nature through a period after the coating, relies on the fastening of the filling plus screw of this kind of film to play sealed effect. Usually, the sealing rubber nail is arranged at the liquid injection hole 4, and in the production of the lithium ion battery, the rubber nail is used for preventing the leakage of electrolyte and dust in the manufacturing process from falling into the battery. However, in the process of sealing the injection hole 4 by the sealing rubber nail, the sealing rubber nail falls into electrolyte when welding is poor, so that battery leakage is caused, and the battery performance is unstable due to high falling rate of some uncontrollable factors in the actual production process.

As shown in fig. 1 to 4, the utility model provides a cover plate assembly includes bearing structure 6, is provided with on the apron body 1 and annotates liquid hole 4, and bearing structure 6 and notes liquid hole 4 are provided with the interval, and bearing structure 6 sets up with annotating liquid hole 4 relatively, installs sealed glue nail on annotating liquid hole 4, and bearing structure 6 is used for the sealed glue nail that drops on the liquid hole 4 is annotated in the bearing. The bearing structure 6 is additionally arranged at the inner side of the liquid injection hole 4 on the cover plate body 1, and is used for bearing the sealing rubber nail when the sealing rubber nail falls off so that the sealing rubber nail cannot fall into electrolyte, meanwhile, the sealing performance of the battery is ensured, sufficient helium can be charged so as to facilitate gas leakage detection, the accuracy of helium leakage detection after the battery is sealed is ensured, the possibility that the gas leakage battery flows into a lower working section is avoided, and the production quality and the production efficiency are improved.

Further, a shell is arranged on the cover plate body 1, electrolyte is contained in the shell, and the bearing structure 6 is arranged on the surface of the cover plate body 1 close to one side of the electrolyte. Set up bearing structure 6 between apron body 1 and the casing, bearing structure 6 sets up in the bottom surface of apron body 1, in order to bear the sealed glue nail that drops.

Further, bearing structure 6 and apron body 1 are provided with the interval, and bearing structure 6 and apron body 1 fixed connection, and of course, understandably, bearing structure 6 and apron body 1 can set up to the joint structure or set up to other fixed connection mode, also can set up to the grafting structure the utility model provides an in the preferred embodiment, bearing structure 6 and apron body 1 are fixed through laser welding. The laser welding belongs to the fusion welding, can reduce the heat to the minimum required quantity, is easy to automatically carry out high-speed welding, can also be controlled by a digital or computer, and meets the requirements of automation and scale production of batteries.

As a preferred embodiment, the supporting structure 6 is made of pure aluminium material. It is of course also possible to realise that the supporting structure 6 could also be made of rubber material.

Further, bearing structure 6 includes fixed plate 61, is provided with connecting rod 62 on the fixed plate 61, connecting rod 62 and apron body 1 fixed connection. The fixed plate 61 and the cover plate body 1 are arranged in parallel, so that the sealing rubber nails on the liquid injection port fall onto the fixed plate 61. The fixing plate 61 and the pouring hole 4 are concentrically arranged so that the packing nails can be dropped at the center of the fixing plate 61.

As a specific example, the fixing plate 61 has a circular plate-shaped structure. The connection rod 62 includes a plurality of connection rods 62, and the plurality of connection rods 62 are disposed at vertexes of an inscribed regular polygon of the circular fixing plate 61. As a preferred embodiment, the number of the plurality of connecting bars 62 is four, and the polygon is a quadrangle, but it is understood that the number of the connecting bars 62 may also include three or five or more, and of course, the number of the connecting bars 62 and the number of the polygons are the same, so that each connecting bar 62 is disposed at the vertex of the inscribed regular polygon. The supporting structure 6 thus provided can make the sealing rubber nails fall onto the fixing plate 61.

Further, the distance between the fixing plate 61 and the cover plate body 1 is greater than the length of the sealing rubber nail, so that the sealing rubber nail can fall into the distance between the fixing plate 61 and the cover plate body 1 through the liquid injection hole 4. Annotate sealed direct relation of liquid hole 4 and whether realizing the battery inside with external environment's isolation completely, therefore, keep unanimous, can realize under the prerequisite of full-automatic wisdom high-efficient production in other operation steps and former production, introduce the sealed plastic nail bearing structure 6 of this embodiment, adopt the mechanics principle of addding the fulcrum reinforcement method, upwards provide the holding power for it. After the battery liquid injection is completed, a certain amount of helium is filled into the battery, a glue nail is filled into a liquid injection port of the battery, the glue nail is embedded right above the bearing structure 6, then a metal sealing cover is covered to carry out laser welding sealing to detect the sealed battery, and the tightness of the battery is judged by detecting whether the battery has helium leakage.

The utility model also provides a battery, including above the apron subassembly, the battery is square aluminum hull lithium cell generally. Of course, it is understood that the battery may be provided as other kinds of lithium batteries.

The utility model provides a bearing structure 6 is seted up to apron subassembly and battery at 1 inboard of apron body, and bearing structure 6 and sealed plastic nail combined action guarantee the leakproofness of battery, can fill the helium of sufficient volume and be convenient for leak detection, guarantee the degree of accuracy that the helium leaks hunting after the battery is sealed, avoided gas leakage battery to flow into the possibility of lower workshop section, improved production quality and production efficiency.

It is to be understood that the present invention has been described with reference to certain embodiments and that various changes or equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention as defined by the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are intended to be covered by the present invention.

Claims

1. The utility model provides a cover plate assembly, a serial communication port, including apron body and bearing structure, be provided with on the apron body and annotate the liquid hole, bearing structure is provided with the interval with annotating the liquid hole, and bearing structure sets up with annotating the liquid hole relatively, installs the sealed nail of gluing on annotating the liquid hole, and bearing structure is used for the bearing to annotate the sealed nail of gluing that drops on the liquid hole.

2. The cover plate assembly of claim 1, wherein the cover plate body is provided with a housing, the housing contains the electrolyte therein, and the supporting structure is provided on a surface of the cover plate body adjacent to a side of the electrolyte.

3. The decking assembly defined in claim 1 wherein the supporting structure and the decking body are secured by fusion welding.

4. The cover plate assembly of any one of claims 1 to 3, wherein the support structure is made of pure aluminum material.

5. The lid assembly of claim 1, wherein the support structure includes a mounting plate having a connecting rod fixedly attached thereto.

6. The lid assembly of claim 5, wherein the fixing plate and the lid body are arranged in parallel such that the dropped sealant is dropped on the fixing plate.

7. The lid assembly according to claim 5, wherein the fixing plate and the injection hole are concentrically arranged so that the bead pin can fall down to the center of the fixing plate.

8. The cover plate assembly of claim 5, wherein the connection bar comprises a plurality of connection bars disposed at vertexes of an inscribed regular polygon of the circular fixing plate.

9. The cover plate assembly of claim 5, wherein the spacing between the securing plate and the cover plate body is greater than the length of the sealing glue spike.

10. A battery comprising the cap plate assembly of any one of claims 1-9.