CN218242021U

CN218242021U - Battery end cover assembly, battery and electric equipment

Info

Publication number: CN218242021U
Application number: CN202222539766.XU
Authority: CN
Inventors: 杨懿; 阳明; 徐卫东
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2023-01-06
Anticipated expiration: 2032-09-23

Abstract

The embodiment of the application provides a battery end cover subassembly, battery and consumer, battery end cover subassembly includes: the end cover is provided with a sinking groove and a liquid injection hole, and the liquid injection hole is communicated with the sinking groove; the sealing element comprises a main body part and a connecting part surrounding the outer edge of the main body part, the connecting part is sunk against the bottom surface of the sinking groove, and a first annular groove is formed by the outer edge of the main body part, the end surface of the connecting part, which is far away from the bottom surface of the sinking groove, and the inner wall of the sinking groove; the welding fixing part is connected the connecting portion the inner wall of heavy groove with the terminal surface that is close to the battery outside of end cover, be used for with sealing member welded fastening in the end cover, the welding fixing part is located in first annular groove can strengthen the steadiness of welding fixing part to battery pack's stability has been promoted.

Description

Battery end cover assembly, battery and electric equipment

Technical Field

The application relates to the technical field of battery structures, in particular to a battery end cover assembly, a battery and electric equipment.

Background

With the continuous development of lithium ion battery technology, compared with other types of batteries such as lead acid, cadmium nickel and the like, the lithium ion battery has the advantages of large specific capacity, no memory effect, high working voltage, high charging speed, wide working temperature range, long cycle life, small volume, light weight and the like. At present, lithium ions are widely applied to the fields of mobile phones, notebook computers, electric automobiles, energy storage cabinets and the like, and the application range of the lithium ions is more and more extensive. When filling liquid package to lithium ion battery, seted up on lithium ion battery's end cover and annotated the liquid hole usually, pour into electrolyte into to the battery through this notes liquid hole into, when annotating the liquid and finishing, need seal annotating the liquid hole through the sealing member. In the existing scheme, a sealing element of the liquid injection hole needs to be welded with an end cover surface, close to the outside of the battery, of the liquid injection hole, and in the welding process, the situation of desoldering easily occurs, so that the stability of the battery is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a battery end cover subassembly, battery and consumer can form in the first annular groove through the inner wall that is located the outer edge of main part and keeps away from terminal surface, the heavy groove of the bottom surface of heavy groove with connecting portion with the welding fixing part for the welding fixing of welding formation can form "colluding the claw" form, grabs the sealing member border, with the steadiness of reinforcing welding fixing, thereby has promoted battery pack's stability.

A first aspect of an embodiment of the present application provides a battery end cap assembly, including: an end cap, a sealing member, and a weld fixture, wherein,

the end cover is provided with a sinking groove and a liquid injection hole, and the liquid injection hole is communicated with the sinking groove;

the sealing element comprises a main body part and a connecting part surrounding the outer edge of the main body part, the connecting part is sunk against the bottom surface of the sinking groove, and a first annular groove is formed on the outer edge of the main body part, the end surface of the connecting part, which is far away from the bottom surface of the sinking groove, and the inner wall of the sinking groove;

the welding fixing piece is connected with the connecting part, the inner wall of the sinking groove and the end face, close to the outer part of the battery, of the end cover and used for welding and fixing the sealing piece on the end cover, and the welding fixing piece is partially located in the first annular groove.

In this example, battery end cover subassembly includes end cover, sealing member and welding mounting, wherein, heavy groove and notes liquid hole have been seted up on the end cover, it with heavy groove intercommunication to annotate the liquid hole, the sealing member includes the main part and the connecting portion that centers on the main part outer edge, connecting portion sink in the bottom surface of heavy groove, the main part outer edge with connecting portion are kept away from the terminal surface of the bottom surface of heavy groove the inner wall of heavy groove forms first annular groove, welding mounting connects connecting portion the inner wall of heavy groove with the terminal surface that is close to the battery outside of end cover, be used for with sealing member welded fastening in the end cover, welding mounting part is located in first annular groove, consequently, can form "colluding the claw" form through being located the main part outer edge with connecting portion in the terminal surface of the bottom surface of heavy groove, the inner wall of heavy groove forms first annular groove for the welding mounting of welding formation can form "colludes the claw" form, grabs the sealing member border, with reinforcing welded steadiness, thereby has promoted battery assembly's stability.

In one possible implementation manner, the side wall of the connecting part is attached to the inner wall of the sinking groove.

In this example, the side wall of the connecting part is attached to the inner wall of the sink tank, so that the material of the welding fixing part can be further reduced from flowing into the electrolyte injection hole from the surface where the sealing part is attached to the sink tank, so that the electrolyte is polluted, and the safety of the battery is improved.

In one possible implementation manner, the side wall of the connecting part, the bottom surface of the sinking groove and the inner wall of the sinking groove form a second annular groove.

In this example, because the outer wall of connecting portion and the bottom surface of heavy groove, the inner wall of heavy groove form the second annular groove, then when carrying out welded fastening to the sealing member through the welding mounting, can set up the material of welding mounting in this second annular groove, increased welded area, advance one and promoted welded stability.

In one possible implementation, the body portion outer edge includes an arcuate outer edge.

In this example, the outer edge of the main body portion is set to be the arc-shaped outer edge, so that the first groove can be formed, the material of the sealing element can be reduced, and the cost can be saved.

In one possible implementation manner, the shape enclosed by the side wall of the connecting part is the same as the cross-sectional shape of the liquid injection hole.

In this example, the shape that encloses the lateral wall of connecting portion is the same with annotate the cross-sectional shape of liquid hole can promote the convenience when annotating the liquid.

In one possible implementation, an arch-shaped space is formed between the main body part and the bottom surface of the sinking groove.

In this example, because the arched space is formed between the main part and the bottom surface of the heavy groove, when the force to the direction of the liquid injection hole on the end surface of the sealing element end cover close to the outside of the battery is applied, an arc-shaped supporting force can be provided, so that the stability of the sealing element structure is improved. Simultaneously, because the arched space is formed between the bottom surface of main part and heavy groove, can provide more can hold the space when the electrolyte inflation in the battery end cover subassembly to battery end cover subassembly's stability has been promoted.

In one possible implementation, the outer surface of the seal member is flush with the end face of the end cap near the exterior of the cell.

In this example, can guarantee the roughness of battery end cover subassembly, promote the suitability of battery end cover subassembly.

In one possible implementation, the first annular groove has a cross-sectional area that gradually increases from the groove bottom to the notch.

In this example, the sectional area of first annular groove from the tank bottom to the notch increases gradually for the sealing member centre has the support inclined plane, decomposes the atress, makes battery end cover subassembly more firm.

In one possible implementation, the outer weld face of the weld fixture is an arcuate weld face.

In this example, through setting up the outer welding face of welding mounting to arc welding face, then can form first recess to can reduce the material of sealing member, save cost, simultaneously owing to can form first recess, first recess forms the invert, can support the sealing member, prevents that the sealing member from collapsing, strengthens battery end cover assembly's stability.

A second aspect of embodiments of the present application provides a battery comprising a housing and a battery end cap assembly according to any one of the first aspects.

A third aspect of embodiments of the present application provides a powered device, which includes a powered device and the battery as described in the second aspect, wherein the battery supplies power to the powered device.

These and other aspects of the present application will be more readily apparent from the following description of the embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1A provides a schematic cross-sectional view of a cell end cap assembly according to an embodiment of the present application;

FIG. 1B provides a top view of a battery end cap assembly according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a sink and a liquid injection hole according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of another sink and filling hole provided in the embodiments of the present application;

FIG. 4 provides a schematic cross-sectional view of another cell end cap assembly according to an embodiment of the present application;

figure 5 provides a schematic cross-sectional view of another cell end cap assembly according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

For a better understanding of the cell end cap assembly provided by the embodiments of the present application, a brief description of the cell end cap assembly will be provided below. This battery end cover subassembly can annotate liquid and encapsulation to the battery, can annotate the liquid hole through seting up on the end cover in the battery end cover subassembly and annotate liquid (pour into the inside of battery into electrolyte), annotate the liquid and accomplish the back, seal the processing through welding fixing spare to setting up the sealing member on heavy groove, can be through the terminal surface of the bottom surface of sinking the groove with being located the main part outer edge with connecting portion, the inner wall in heavy groove forms first annular groove, make welding fixing spare that welding formed can form "collude the claw" form, grasp the sealing member border, with reinforcing welding fixing spare's steadiness, thereby battery assembly's stability has been promoted.

Referring to fig. 1A and 1B, fig. 1A is a schematic cross-sectional view of a battery end cap assembly according to an embodiment of the present disclosure, and fig. 1B is a top view of the battery end cap assembly according to the embodiment of the present disclosure. As shown in fig. 1A and 1B, the cell end cap assembly includes: end cap 1, sealing member 2 and weld fixture 3, wherein,

the end cover 1 is provided with a sink groove 10 and a liquid injection hole 11, and the liquid injection hole 11 is communicated with the sink groove 10;

the sealing element 2 comprises a main body part 20 and a connecting part 21 surrounding a main body part outer edge 22, the connecting part 21 is sunk to be close to the bottom surface 101 of the sinking groove 10, and the main body part outer edge 22 and the end surface of the connecting part 21, far away from the bottom surface 101 of the sinking groove 10, and the inner wall 100 of the sinking groove 10 form a first annular groove 23;

the welding fixing part 3 is connected with the connecting part 21, the inner wall 100 of the sink groove 10 and the end face 12 of the end cover 1 close to the outside of the battery, and is used for welding and fixing the sealing element 2 on the end cover 1, and the welding fixing part 3 is partially positioned in the first annular groove 23.

The cross-sectional shapes of the injection hole 11 and the sink 10 may be the same, and may be, for example, circular or elliptical. Of course, other shapes may be used, such as rectangular, triangular, diamond, etc., and this is only an example, and when the cross-sectional shape is the other shapes described above, the rectangle is used as an example, and the rectangle formed by the cross-section of the liquid inlet 11 is embedded in the rectangle formed by the cross-section of the sink-top tank 10, as shown in fig. 2.

Of course, the cross-sectional shapes of the pour hole 11 and the sink 10 may be different, for example, as shown in FIG. 3, if the cross-sectional shape of the pour hole 11 is circular and the cross-sectional shape of the sink 10 is elliptical, then the circular cross-sectional shape of the pour hole 11 is embedded in the elliptical cross-sectional shape of the sink 10.

The electrode 4 in fig. 1B is not shown in fig. 1A described above.

In this example, can set up the sealing member and encapsulate on the heavy groove of seting up on the end cover, thereby the material of having avoided welding fixing spare flows into from the sealing member and the surface of heavy groove laminating and annotates the liquid hole in order to cause the pollution to electrolyte, the security of battery has been promoted, simultaneously, can be through the terminal surface of the bottom surface of keeping away from heavy groove with the welding fixing spare part outer edge with connecting portion, the inner wall of heavy groove forms in the first annular groove, make welding fixing spare that welding formed can form "collude the claw" form, grasp the sealing member border, with reinforcing welding fixing spare's steadiness, thereby battery pack's stability has been promoted.

In one possible implementation, as shown in fig. 4, the side wall 210 of the connecting portion 21 is disposed to be flush with the inner wall 100 of the sink 10.

In this example, with the lateral wall of connecting portion and the inner wall laminating setting of heavy groove, then can further reduce the material of welding mounting and flow into from the surface of sealing member with heavy groove laminating and annotate the liquid hole and cause the pollution with electrolyte, promoted the security of battery.

In one possible implementation, as shown in fig. 5, the side wall 210 of the connecting portion 21 forms a second annular groove 24 with the bottom surface 101 of the sink 10 and the inner wall 100 of the sink 10.

In one possible implementation, as shown in fig. 1A, the outer edge of the main body portion 20 includes an arc-shaped outer edge.

In one possible implementation, as shown in fig. 1A, the sidewall 210 of the connecting portion 21 encloses the same shape as the cross-sectional shape of the pour hole 11.

In one possible implementation, as shown in fig. 1A, an arch-shaped space 25 is formed between the main body portion 20 and the bottom surface of the sink 10.

In one possible implementation, the outer surface of the seal member is flush with the end face of the end cap adjacent to the exterior of the cell.

In a possible realization, the first annular recess 23 has a groove with a cross-sectional area that increases from the groove bottom to the mouth.

In one possible implementation, as shown in fig. 1A, the outer weld face of the weld fixture 3 is an arcuate weld face.

There is also provided in an embodiment of the present application a battery including a housing and a battery end cap assembly as described in any one of the preceding embodiments.

The embodiment of the present application further provides an electric device, where the electric device includes an electric device and the battery as described in the foregoing embodiment, and the battery provides electric energy for the electric device.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the above description of the embodiments is only provided to help understand the method and the core concept of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A battery end cap assembly, comprising: an end cap, a sealing member, and a weld fixture, wherein,

the welding fixing piece is connected with the connecting part, the inner wall of the sinking groove and the end face, close to the outer part of the battery, of the end cover, and is used for fixing the sealing piece in the end cover in a welding mode, and the welding fixing piece is partially located in the first annular groove.

2. The battery end cap assembly of claim 1, wherein a side wall of the connecting portion is configured to engage an inner wall of the sink.

3. The battery end cap assembly of claim 1, wherein the side wall of the connecting portion forms a second annular groove with the bottom surface of the sink and the inner wall of the sink.

4. The battery end cap assembly of claim 2 or 3, wherein the body portion outer edge comprises an arcuate outer edge.

5. The battery end cap assembly of claim 4, wherein the side walls of the connecting portion define a shape that is the same as the cross-sectional shape of the pour hole.

6. The battery end cap assembly of claim 5, wherein the body portion and a bottom surface of the sink define an arcuate space therebetween.

7. The cell end cap assembly of claim 5 or 6, wherein the outer surface of the seal is flush with the end face of the end cap adjacent the exterior of the cell.

8. The cell end cap assembly of claim 5 or 6, wherein the first annular groove has a cross-sectional area that increases from the groove bottom to the slot opening.

9. The battery end cap assembly of claim 8, wherein the outer weld face of the weld fixture is an arcuate weld face.

10. A battery comprising a housing and a battery end cap assembly according to any one of claims 1 to 9.

11. An electrical consumer, characterized in that the electrical consumer comprises an electrical device and a battery according to claim 10, the battery providing electrical energy to the electrical device.