CN220065849U - Battery monomer, battery and electric equipment - Google Patents

Abstract

The utility model relates to a battery monomer, a battery and electric equipment. The battery cell includes: the shell is provided with an opening at least at one end, the inner wall of the shell protrudes towards the inside of the shell to form an annular boss, and the annular boss is positioned at one end of the shell with the opening; the battery cell assembly is accommodated in the shell and is positioned at one side of the annular boss, which is away from the opening; the cover plate is supported and arranged on one side of the annular boss, which faces the opening; the shell is further provided with an annular welding area which is distributed around the opening, and the annular welding area is bonded with one side, away from the annular boss, of the cover plate and is subjected to penetration welding. Therefore, even if the shell is thinned, the welding quality between the shell and the cover plate is not affected, welding defects such as explosion points, welding leakage and the like are avoided, and the yield of the battery cells is greatly improved.

Description

Battery monomer, battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery monomer, a battery and electric equipment.

Background

Batteries are widely used in various devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like. The battery cell is an important component of the battery and generally comprises a housing, a cover plate and a battery cell assembly, wherein the housing is provided with an opening, and the battery cell assembly is arranged in the housing through the opening. The apron lid is established in the opening of casing, and the periphery edge of apron and the laminating of casing open-ended terminal surface promptly then welds circumferentially along the gap between apron and the casing open-ended terminal surface to seal electric core assembly in the casing.

In order to reduce the weight of the battery cell and to expand the capacity of the battery cell, it is necessary to reduce the wall thickness of the case. However, when the wall thickness of the shell is too thin, the welding difficulty of the cover plate and the shell is greatly increased, welding defects such as explosion points, welding leakage and the like are easy to occur, and the yield of the battery cells is greatly reduced.

Disclosure of Invention

Based on the above, it is necessary to provide a battery cell, a battery and electric equipment for improving the above defects, which are necessary to solve the problems that in the prior art, after the wall thickness of the housing is reduced, the welding difficulty of the cover plate and the housing is greatly increased, and the welding defects such as explosion points, welding leakage and the like are easy to occur, so that the yield of the battery cell is greatly reduced.

A battery cell comprising:

the shell is provided with an opening at least one end, the inner wall of the shell protrudes towards the inside of the shell to form an annular boss, and the annular boss is positioned at one end of the shell with the opening;

the battery cell assembly is accommodated in the shell and is positioned at one side of the annular boss, which is away from the opening; a kind of electronic device with high-pressure air-conditioning system

The cover plate is supported and arranged on one side of the annular boss, which faces the opening;

the shell is further provided with an annular welding area which is distributed around the opening, and the annular welding area is bonded with one side of the cover plate, which is away from the annular boss, and penetration welding is carried out.

In one embodiment, the housing projects from the outside to the inside to form an annular groove on the outside of the housing and the annular boss on the inside of the housing.

In one embodiment, the portion of the housing on the side of the cover plate facing away from the cell assembly is turned over to the inside of the housing to form the annular welding area.

In one embodiment, the circumferential edge of the cover plate protrudes towards the side away from the annular boss to form the annular boss; the annular welding area comprises a first sub-annular area attached to the surface of one side of the annular protrusion, which faces away from the annular boss, and a second sub-annular area attached to the inner side surface of the annular protrusion;

and the first sub-annular region and/or the second sub-annular region and the annular protrusion are subjected to penetration welding.

In one embodiment, the two opposite ends of the shell are provided with the openings, the number of the cover plates is two, and the two cover plates are respectively arranged at the two openings.

In one embodiment, the battery cell further comprises a first current collecting plate, a second current collecting plate and a pole assembly;

the first current collecting disc is electrically connected between one of the cover plates and the cell assembly, and the second current collecting disc is arranged on one side, facing the cell assembly, of the other cover plate in an insulating manner and is electrically connected with the cell assembly; the pole assembly is arranged on the cover plate close to the second current collecting disc in an insulating mode and is electrically connected with the second current collecting disc.

In one embodiment, the battery cell further includes a conductive elastic member abutting between the first current collecting plate and the corresponding cover plate for providing a pre-tightening force that causes the first current collecting plate to have a movement tendency toward the cell assembly.

In one embodiment, the conductive elastic member is a wave spring plate.

A battery comprising a battery cell as described in any one of the embodiments above.

A powered device comprising a battery cell as described in any of the embodiments above or a battery as described in any of the embodiments above.

In the practical production process, the battery cell, the battery and the electric equipment are arranged in the shell through the opening. An annular boss is then formed at the end of the housing having the opening. Then, a cover plate support is disposed on the annular boss. Then, the annular welding area of the shell is turned over to be attached to one side, away from the annular boss, of the cover plate, and penetration welding is conducted on the annular welding area and the cover plate, which are attached to each other. Compared with the prior art that the peripheral edge of the cover plate is lapped with the end face of the opening end of the shell and welded, the cover plate is limited between the annular boss and the annular welding area of the shell, namely, the annular boss is supported and arranged on one side of the cover plate, the annular boss is attached to the opposite side of the cover plate, and the welding area of the shell is welded with the cover plate by penetration welding, so that the welding quality between the shell and the cover plate is not affected even if the shell is thinned, welding defects such as explosion points, welding leakage and the like are avoided, and the yield of the battery monomers is greatly improved.

Drawings

Fig. 1 is a schematic exploded view of a battery cell according to an embodiment of the present utility model;

fig. 2 is a front view of the battery cell shown in fig. 1;

fig. 3 is a cross-sectional view of the battery cell shown in fig. 2;

FIG. 4 is an enlarged view of a portion of the battery cell shown in FIG. 3 at a terminal assembly;

fig. 5 is a partial enlarged view of the battery cell shown in fig. 4 at a;

fig. 6 is a cross-sectional view of a battery cell according to another embodiment of the present utility model;

FIG. 7 is an enlarged view of a portion of the battery cell shown in FIG. 6 at a terminal assembly;

fig. 8 is a partial enlarged view of B of the battery cell shown in fig. 7.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In one embodiment of the utility model, a battery is provided that refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present utility model may include a battery module, a battery pack, or the like. In particular, the battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells. Specifically, in the battery, the number of the battery cells may be one or more. If the number of the battery cells is multiple, the multiple battery cells can be connected in series or in parallel or in series-parallel connection, and the series-parallel connection means that the multiple battery cells are connected in series or in parallel. The battery modules can be formed by connecting a plurality of battery monomers in series or in parallel or in series-parallel connection, and the battery modules are connected in series or in parallel or in series-parallel connection to form a whole and are accommodated in the box body. Or all the battery cells can be directly connected in series or in parallel or in series-parallel, and then the whole formed by all the battery cells is accommodated in the box body.

It is understood that the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the utility model. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the utility model. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

Referring to fig. 1 to 5, an embodiment of the utility model provides a battery cell, which includes a housing 10, a cell assembly 20 and a cover 30. At least one end of the housing 10 has an opening 12, and an inner wall of the housing 10 protrudes toward the inside of the housing 10 to form an annular boss 11. The annular boss 11 is located at the end of the housing 10 having the opening 12. The battery cell assembly 20 is accommodated in the housing 10 and is located on the side of the annular boss 11 facing away from the opening 12. The cover plate 30 is supported on the side of the annular boss 11 facing the opening 12. The housing 10 also has an annular welding zone 14 (see fig. 4 or 5) running around the opening 12, which annular welding zone 14 engages with the side of the cover plate 30 facing away from the annular bead 11 and is welded through, so that a fixed connection and sealing of the cover plate 30 to the housing 10 is achieved.

Thus, in the actual production process, first, the cell assembly 20 is placed in the case 10 through the opening 12. An annular boss 11 is then formed at the end of the housing 10 having the opening 12. Then, the cover plate 30 is supportingly disposed on the annular boss 11. Then, the annular welding area 14 of the housing 10 is turned over to be attached to the side of the cover plate 30 facing away from the annular boss 11, and penetration welding is performed on the annular welding area 14 and the cover plate 30 attached to each other. Compared with the prior art that the peripheral edge of the cover plate is lapped with the end face of the opening of the shell and welded, the cover plate 30 is limited between the annular boss 11 and the annular welding area 14 of the shell 10, namely, the annular boss 11 is supported and arranged on one side of the cover plate 30, the annular welding area 14 is attached to the opposite side of the cover plate 30, and the annular welding area 14 of the shell 10 is welded with the cover plate 30 by penetration welding, so that the welding quality between the shell 10 and the cover plate 30 is not affected even if the shell 10 is thinned, welding defects such as explosion points, welding leakage and the like are avoided, and the yield of the battery cell is greatly improved. Preferably, the wall thickness of the housing 10 is 0.1mm to 0.2mm, for example 1.5mm.

Referring to fig. 4 and 5, in the embodiment, the housing 10 is protruded from the outside to the inside to form an annular groove 13 on the outside of the housing 10 and form the above-mentioned annular boss 11 on the inside of the housing 10. Alternatively, the above-described annular groove 13 may be formed on the outside of the housing 10 using a channeling process, and the annular boss 11 may be formed on the inside of the housing 10.

In particular, in the embodiment, the portion of the housing 10 on the side of the cover 30 facing away from the cell assembly 20 is turned over toward the inside of the housing 10 to form the annular welding area 14. In this way, an annular welding area 14 is formed at the opening 12 of the housing 10 by the flanging process, and the annular welding area 14 surrounds the opening 12 and is attached to a surface of the cover plate 30 facing away from the annular boss 11. The annular welding area 14 and the cover plate 30 are subjected to penetration welding from the outer side of the shell 10, so that the fixed connection and sealing between the shell 10 and the cover plate 30 are realized.

Referring to fig. 6 to 8, in some embodiments, the peripheral edge of the cover plate 30 protrudes to a side facing away from the annular boss 11 to form an annular protrusion 31. The annular land 14 includes a first sub-annular region 141 that is bonded to a side surface of the annular projection 31 facing away from the annular boss 11 and a second sub-annular region 142 that is bonded to an inner side surface of the annular projection 31. The first sub-annular region 141 and/or the second sub-annular region 142 are welded to the annular projection 31 by means of penetration welding. In this way, by arranging the annular protrusion 31 on the cover plate 30 and coating the annular protrusion 31 by using the first sub-annular region 141 and the second sub-annular region 142 of the annular welding region 14, penetration welding is performed, which is beneficial to increasing the connection strength between the cover plate 30 and the housing 10 and is more convenient for penetration welding; on the other hand, the first sub-annular region 141 and/or the second sub-annular region 142 of the case 10 are welded with the annular protrusion 31 of the cap plate 30, so that other regions of the cap plate 30 can be thinned, thereby being beneficial to reducing the weight of the battery cell, increasing the space inside the case 10, and improving the capacity of the battery cell.

It will be appreciated that the annular projection 31 is not required and that the annular projection 31 may not be provided. When the annular protrusion 31 is not provided, the annular welding area 14 is directly attached to the surface of the side of the cover plate 30 facing away from the annular boss 11 (see fig. 4 or 5), and penetration welding is performed.

It should be noted that, in some embodiments, the housing 10 may have a cylindrical structure with an open end, and a drawing process in stamping is required to form the housing 10. However, when the thickness of the case 10 is thin, it is easily broken during the stretch forming, and the length of the case 10 is limited by the stretch process. To overcome the above-mentioned drawbacks, in other embodiments, the housing 10 has openings 12 at opposite ends, i.e., the housing 10 has a cylindrical structure with two open ends. The number of the cover plates 30 is two, and two cover plates 30 are respectively disposed at the two openings 12 to close the two openings 12 of the housing 10. Thus, in this embodiment, the shell 10 adopts a cylindrical structure with two open ends, and the shell 10 can be formed by adopting a process of rolling and welding a thin plate, so that the stretching process is avoided, and the defects of stretch cracking and the like caused by the stretching process are overcome.

It will be appreciated that the two cover plates 30 are identical to the assembly structure of the housing 10 at the two openings 12, respectively, i.e. the two openings 12 of the housing 10 are each formed with an annular boss 11 and an annular weld zone 14, and each cover plate 30 is disposed between the annular boss 11 and the annular weld zone 14 at the corresponding opening 12 and is fixed with the corresponding annular weld zone 14 by penetration welding. The cell assembly 20 is disposed in the space between the two annular lands 14.

Referring to fig. 1 to 4, in an embodiment, the battery cell further includes a first current collecting plate 40, a second current collecting plate 41 and a post assembly 50. The first current collecting plate 40 is electrically connected between one of the cover plates 30 and the cell assembly 20, and the second current collecting plate 41 is electrically connected to the cell assembly 20 while the other cover plate 30 is electrically insulated from the cell assembly 20.

That is, the first current collecting plate 40 is located between one of the cap plates 30 and the cell assembly 20 and is electrically connected to both the cap plate 30 and the cell assembly 20, i.e., the cell assembly 20 is electrically connected to the case 10 through the first current collecting plate 40 and the cap plate 30 such that the case 10 serves as one electrode of the battery cell. The second current collecting plate 41 is located between the other cover plate 30 and the cell assembly 20, is insulated from the cover plate 30, and is electrically connected to the cell assembly 20. The electrode post assembly 50 is insulated on the cover plate 30 near the second current collecting plate 41 and is electrically connected with the second current collecting plate 41, i.e. the battery cell assembly 20 is electrically connected with the electrode post assembly 50 through the second current collecting plate 41, so that the electrode post assembly 50 serves as the other electrode of the battery cell. That is, the case 10 and the post assembly 50 serve as two electrodes (i.e., a positive electrode and a negative electrode) of the battery cell to achieve input or output of electric energy of the battery cell.

In particular, in the embodiment, the battery cell further includes a conductive elastic member 60, and the conductive elastic member 60 is abutted between the first current collecting plate 40 and the corresponding cover plate 30, so as to provide a pre-tightening force for enabling the first current collecting plate 40 to have a movement trend towards the battery cell assembly 20, so that the first current collecting plate 40, the battery cell assembly 20, the second current collecting plate 41 and the pole assembly 50 between the two cover plates 30 are pressed and fixed with each other. It will be appreciated that since the conductive elastic member 60 may be conductive, the cell assembly 20 may be electrically connected with the case 10 through the first current collecting plate 40, the conductive elastic member 60 and the corresponding cap plate 30, so that the case 10 can function as one electrode of the battery cell. Optionally, the conductive elastic member 60 is a wave spring plate.

In an embodiment of the present utility model, the pole assembly 50 includes a pole 51 and a conductive block 52. The battery cell further includes a first insulator 70, a second insulator 71, and an insulator sleeve 72. The cover plate 30 adjacent to the second collecting plate 41 is provided with a through hole 31 (see fig. 1), and the pole 51 is arranged through the through hole 31 on the cover plate 30. The first end 510 of the pole 51 on the side of the cover plate 30 near the cell assembly 20 abuts against the second current collecting plate 41, i.e. the first end 510 of the pole 51 is electrically connected to the second current collecting plate 41. The second end 511 of the pole 51 at the side of the cover plate 30 away from the battery cell assembly 20 is fixedly connected with the conductive block 52, so that the pole 51 and the conductive block 52 are respectively fixed at two opposite sides of the corresponding cover plate 30. The first insulator 70 is disposed between the second current collecting tray 41 and the corresponding cap plate 30, thereby achieving insulation of the second current collecting tray 41 from the corresponding cap plate 30. A portion of the first insulating member 70 is located between the peripheral side edge of the second collecting tray 41 and the inner wall of the case 10, thereby achieving insulation of the second collecting tray 41 from the case 10. A portion of the first insulating member 70 is located between the first end 510 of the pole 51 and the corresponding cap plate 30, thereby achieving insulation of the first end 510 of the pole 51 from the corresponding cap plate 30. The second insulating member 71 is disposed between the conductive block 52 and the corresponding cap plate 30, thereby achieving insulation of the conductive block 52 from the corresponding cap plate 30. The insulating sleeve 72 is sleeved on the pole 51 and is partially positioned in the through hole 31, so that the insulation between the pole 51 and the corresponding cover plate 30 is realized.

Alternatively, the first insulating member 70 may be an insulating plastic member. The second insulating member 71 may be an insulating plastic member. The insulating sleeve 72 may be an insulating rubber sleeve.

Further, the second collecting tray 41 has a first positioning portion 411, and the first insulator 70 has a second positioning portion 701. The first positioning portion 411 is in positioning fit with the second positioning portion 701 to limit movement of the second collecting tray 41 in the radial direction of the housing 10, so as to facilitate assembly of the second collecting tray 41, and avoid contact between the second collecting tray 41 and the housing 10 due to assembly deviation.

Further, the first positioning portion 411 is a positioning protrusion, and the second positioning portion 701 is a positioning groove, and the positioning protrusion is inserted into the positioning groove, so as to position the second collecting tray 41. Alternatively, the positioning protrusion extends lengthwise along the peripheral edge of the second collecting tray 41 in a ring shape, and the positioning groove is also in a ring shape matching the positioning protrusion so that the positioning protrusion can be inserted into the positioning groove.

Note that, the first positioning portion 411 is not limited to a positioning protrusion, and the second positioning portion 701 is a positioning groove. In other embodiments, the first positioning portion 411 may be a positioning groove, and the second positioning portion 701 is a positioning protrusion, so long as positioning of the second collecting tray 41 in the radial direction of the housing 10 can be achieved, which is not limited herein.

In an embodiment of the present utility model, the cell assembly 20 is composed of a positive electrode sheet, a negative electrode sheet, and an isolating film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the separator may be polypropylene (PP) or Polyethylene (PE). In addition, the cell assembly 20 may be a winding type structure or a lamination type structure, and the embodiment of the present utility model is not limited thereto.

Alternatively, the material of the housing 10 and the two cover plates 30 may be steel. The material of the first current collecting plate 40 and the second current collecting plate 41 may be copper, and the outer surfaces of the first current collecting plate 40 and the second current collecting plate 41 have a nickel plating layer. Of course, in other embodiments, other conductive materials may be used for the housing 10, the two cover plates 30, the first current collecting plate 40 and the second current collecting plate 41, which are not limited herein.

Optionally, the first current collecting plate 40 is electrically connected to the negative electrode tab of the cell assembly 20, so that the housing 10 is a negative electrode of the battery cell. The second current collecting plate 41 is electrically connected to the positive electrode tab of the cell assembly 20 such that the post 51 serves as the positive electrode of the battery cell. Of course, in other embodiments, the housing 10 may also be used as a positive electrode of a battery cell, and the post 51 may be used as a negative electrode of the battery cell, which is not limited herein.

Based on the battery, the utility model further provides electric equipment. The powered device includes a battery or battery cell as described in any of the embodiments above, with the powered device utilizing the battery or battery cell as a power source. In particular, the electrical consumer may be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others. The embodiment of the utility model does not limit the electric equipment in particular.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A battery cell, comprising:

the shell (10), at least one end of the shell (10) is provided with an opening (12), the inner wall of the shell (10) protrudes towards the inside of the shell (10) to form an annular boss (11), and the annular boss (11) is positioned at one end of the shell (10) with the opening (12);

the battery cell assembly (20) is accommodated in the shell (10) and is positioned at one side of the annular boss (11) away from the opening (12); a kind of electronic device with high-pressure air-conditioning system

A cover plate (30) supported on one side of the annular boss (11) facing the opening (12);

the housing (10) further comprises an annular welding area (14) arranged around the opening (12), and the annular welding area (14) is attached to one side of the cover plate (30) away from the annular boss (11) and subjected to penetration welding.

2. The battery cell according to claim 1, wherein the case (10) is protruded from the outside to the inside to form an annular groove (13) at the outside of the case (10) and the annular boss (11) at the inside of the case (10).

3. The battery cell according to claim 1, wherein a portion of the housing (10) on a side of the cover plate (30) facing away from the cell assembly (20) is flanged to an inside of the housing (10) to form the annular welding zone (14).

4. The battery cell according to claim 1, wherein a peripheral edge of the cover plate (30) protrudes to a side facing away from the annular boss (11) to form an annular protrusion (31); the annular welding area (14) comprises a first sub-annular area (141) and a second sub-annular area (142), the first sub-annular area (141) is attached to the surface of one side of the annular protrusion (31) away from the annular boss (11), and the second sub-annular area (142) is attached to the inner side surface of the annular protrusion (31);

the first sub-annular region (141) and/or the second sub-annular region (142) are penetration welded to the annular projection (31).

5. The battery cell according to any one of claims 1 to 4, wherein the housing (10) has the openings (12) at opposite ends thereof, the cover plates (30) are provided in two, and the two cover plates (30) are provided at the two openings (12), respectively.

6. The battery cell of claim 5, further comprising a first current collecting plate (40), a second current collecting plate (41), and a post assembly (50);

the first current collecting disc (40) is electrically connected between one of the cover plates (30) and the cell assembly (20), and the second current collecting disc (41) is arranged on one side, facing the cell assembly (20), of the other cover plate (30) in an insulating manner and is electrically connected with the cell assembly (20); the pole assembly (50) is arranged on the cover plate (30) close to the second current collecting disc (41) in an insulating mode and is electrically connected with the second current collecting disc (41).

7. The battery cell of claim 6, further comprising a conductive spring (60), the conductive spring (60) abutting between the first current collecting plate (40) and the corresponding cover plate (30) for providing a pre-tension force that causes the first current collecting plate (40) to have a tendency to move toward the cell assembly (20).

8. The battery cell of claim 7, wherein the conductive elastic member (60) is a wave spring plate.

9. A battery comprising a battery cell according to any one of claims 1 to 8.

10. A powered device comprising a battery cell according to any one of claims 1 to 8 or a battery according to claim 9.