CN220066028U - 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: a housing having an opening and a weld region disposed around the opening; the battery cell assembly is accommodated in the shell; the cover plate is arranged at the opening; the current collecting disc is arranged between the battery cell assembly and the cover plate and is electrically connected with the battery cell assembly; wherein, the cover plate and the current collecting disc are partially positioned at the welding area of the shell so as to carry out laser penetration welding on the shell, the cover plate and the current collecting disc from the outer side of the welding area. Therefore, the cover plate and the current collecting disc can be fixedly connected and electrically connected with the shell only by one welding procedure. Compared with the prior art needing multiple welding procedures, the method has the advantages that the assembling process of the battery cell is greatly simplified, welding inside the shell is avoided, the risk of short circuit caused by residual metal powder inside the shell is avoided, and the safety of the battery cell is 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 electronic 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 cells are important components of the battery and generally include a housing, end caps, a cell assembly, and a current collecting member. The current collecting member serves to electrically connect the cell assembly with the case such that the case serves as one electrode (e.g., a negative electrode) of the battery cell.

In the process of assembling the battery cells, first, the current collecting member is welded to the tab of the cell assembly. Then, the current collecting member and the cell assembly are integrally formed into a case through the opening, and the current collecting member is welded to the inner wall of the case. And then, placing the end cover at the opening of the shell, and performing spot welding positioning on the end cover and the shell. And then, continuously welding the end cover and the shell, on one hand, realizing the fixed connection of the end cover and the shell, and on the other hand, realizing the sealing between the end cover and the shell, and avoiding the leakage of electrolyte in the shell from a gap between the end cover and the shell. The above-mentioned assembly process needs to be welded many times, leads to the technological process complicated to the metal dust that produces when welding current collecting member and casing remains in the casing inside easily, has greatly increased the risk of taking place the short circuit.

Disclosure of Invention

Based on this, it is necessary to provide a battery cell, a battery and electric equipment for improving the above-mentioned defects, which are necessary to solve the problems that the assembly process of the battery cell in the prior art needs to be welded for many times, resulting in complex process, and the metal powder generated during welding is easy to remain inside the shell, thus greatly increasing the risk of short circuit.

A battery cell comprising:

a housing having an opening and a weld area disposed around the opening;

the battery cell assembly is accommodated in the shell;

the cover plate is arranged at the opening; a kind of electronic device with high-pressure air-conditioning system

The current collecting disc is arranged between the battery cell assembly and the cover plate and is electrically connected with the battery cell assembly;

wherein, the cover plate and the part of the current collecting disc are positioned at the welding area of the shell so as to carry out laser penetration welding on the shell, the cover plate and the current collecting disc from the outer side of the welding area.

In one embodiment, the shell is further provided with an annular end face, the annular end face is arranged around the opening and is connected with the inner wall and the outer wall of the shell, an annular groove arranged around the opening is formed in the annular end face, and the annular groove is located in the welding area;

the cover plate is attached to the annular end face, an annular bulge is arranged on one side of the annular end face, and the annular bulge is inserted into the annular groove.

In one embodiment, the peripheral edge of the collector plate is in contact with the inner wall of the welded area of the housing.

In one embodiment, the peripheral edge of the collecting tray is folded towards the same side of the collecting tray to form an annular flanging;

the annular flange is in contact with the inner wall of the welding area of the shell.

In one embodiment, the annular flange is an interference fit with an inner wall of the weld region of the housing.

In one embodiment, the annular end surface comprises a first sub-end surface positioned on one side of the annular groove adjacent to the inner wall of the shell and a second sub-end surface positioned on one side of the annular groove adjacent to the outer wall of the shell;

the first sub-end face is flush with the second sub-end face, the cover plate is attached to the first sub-end face and the second sub-end face, and the peripheral edge of the cover plate is flush with the outer wall of the shell.

In one embodiment, the annular end surface comprises a first sub-end surface positioned on one side of the annular groove adjacent to the inner wall of the shell and a second sub-end surface positioned on one side of the annular groove adjacent to the outer wall of the shell;

the cover plate is attached to the first sub-end face, the second sub-end face is higher than the first sub-end face, and the height difference between the second sub-end face and the first sub-end face is equal to the thickness of the cover plate.

In one embodiment, the peripheral edge of the cover plate is provided with an annular bulge protruding towards one side of the cover plate, the annular bulge is contacted with the inner wall of the welding area of the shell, and the current collecting disc is contacted with one side of the annular bulge away from the inner wall of the shell;

the housing also includes a non-welded region that is non-coincident with the welded region, the welded region having a thickness that is less than a thickness of the non-welded region.

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

A powered device comprising a battery as in any one of the embodiments above.

According to the battery monomer, the battery and the electric equipment, as the cover plate and the current collecting disc are partially positioned at the welding area of the shell, when laser penetration welding is performed on the outer side of the welding area of the shell, the welding connection of the shell, the cover plate and the current collecting disc can be realized. That is, only one welding process is required to achieve the fixed and electrical connection of the cover plate and the current collecting plate with the case. Compared with the prior art needing multiple welding procedures, the method has the advantages that the assembling process of the battery cell is greatly simplified, welding inside the shell is avoided, the risk of short circuit caused by residual metal powder inside the shell is avoided, and the safety of the battery cell is improved.

Drawings

Fig. 1 is a cross-sectional view of a battery cell according to an embodiment of the present utility model;

fig. 2 is a partial enlarged view of the battery cell shown in fig. 1 at a;

fig. 3 is a cross-sectional view of a case of the battery cell shown in fig. 1;

FIG. 4 is an enlarged view of a portion of the housing shown in FIG. 3 at B;

fig. 5 is a schematic structural view of a current collecting plate of the battery cell shown in fig. 1;

fig. 6 is an enlarged view of a portion of the manifold plate at C shown in fig. 5;

fig. 7 is a partial enlarged view of a battery cell according to another embodiment of the present utility model;

fig. 8 is a partial enlarged view of a battery cell according to still another embodiment of the present utility model.

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.

Alternatively, 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 by 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 4, an embodiment of the utility model provides a battery cell, which includes a housing 10, a cell assembly 20, a cover plate 30 and a current collecting plate 40. The housing 10 has an opening 12 and a weld region 14 disposed around the opening 12. The battery cell assembly 20 is accommodated in the housing 10. A cover plate 30 is provided at the opening 12 of the housing 10 to close the opening 12. The current collecting plate 40 is disposed between the cell assembly 20 and the cap plate 30, and is electrically connected to the cell assembly 20. Wherein, the cover plate 30 and part of the current collecting plate 40 are located at the welding area 14 of the casing 10, so as to perform laser penetration welding on the casing 10, the cover plate 30 and the current collecting plate 40 from the outer side of the welding area 14 of the casing 10, on one hand, the fixed connection of the current collecting plate 40 and the cover plate 30 with the casing 10 is realized, and on the other hand, the electric connection of the current collecting plate 40 and the casing 10 is conveniently realized, so that the casing 10 is used as one electrode (such as a negative electrode) of a battery cell, and the output or input of the electric energy of the battery cell is realized.

In this way, since the cover plate 30 and the current collecting plate 40 are partially located at the welding region 14 of the case 10, it is possible to achieve welding connection of the case 10, the cover plate 30 and the current collecting plate 40 when laser penetration welding is performed outside the welding region 14 of the case 10. That is, only one welding process is required to achieve the fixed connection and the electrical connection of the cap plate 30 and the current collecting plate 40 with the case 10. Compared with the prior art requiring a plurality of welding procedures, the assembly process of the battery cell is greatly simplified, and welding inside the shell 10 is avoided, so that the risk of short circuit caused by residual metal powder inside the shell 10 is avoided, and the safety of the battery cell is improved.

Specifically, the cell assembly 20 is composed of a positive electrode tab, a negative electrode tab, and a separator. 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 bare cell may be a winding type structure or a lamination type structure, and the embodiment of the utility model is not limited thereto.

Alternatively, the material of the case 10 and the cover plate 30 may be steel. The material of the current collecting plate 40 may be copper, and the outer surface of the current collecting plate 40 has a nickel plating layer. Of course, in other embodiments, other conductive materials may be used for the housing 10, the cover plate 30, and the current collecting plate 40, which are not limited herein.

Specifically, the battery cell further includes an electrode terminal 50 (see fig. 1), and the electrode terminal 50 is provided on the case 10 in an insulating manner and electrically connected to the cell assembly 20, so that the electrode terminal 50 serves as another electrode of the battery cell and is opposite in polarity to the case 10, thereby commonly achieving the input or output of electric power to or from the battery cell. That is, the two electrodes of the battery cell are the electrode terminal 50 and the case 10, respectively. Optionally, the current collecting plate 40 is electrically connected to the negative electrode tab of the cell assembly 20, so that the housing 10 is the negative electrode of the battery cell. The electrode terminal 50 is electrically connected with the positive electrode tab of the cell assembly 20 such that the electrode terminal 50 serves as the positive electrode of the battery cell. Of course, in other embodiments, the case 10 may also be used as a positive electrode of a battery cell, and the electrode terminal 50 may be used as a negative electrode of the battery cell, which is not limited herein. The assembly structure of the electrode terminal 50 and the case 10 may be a well-known structure, and is not limited thereto.

In an embodiment of the utility model, the housing 10 also has an annular end face 18, which annular end face 18 is arranged around the opening 12 and is connected to the inner and outer walls of the housing 10. The annular end face 18 is provided with an annular groove 16 disposed around the opening 12. The annular groove 16 is located in the weld region 14 of the housing 10. The cover plate 30 is fitted with the annular end face 18 to close the opening 12 of the housing 10. The cover plate 30 has an annular projection 31 on a side facing the annular end face 18, and the annular projection 31 is inserted into the annular groove 16 so that the annular projection 31 located in the annular groove 16 is welded integrally with the housing 10 when laser penetration welding is performed from the outside of the housing 10. In this way, the annular end face 18 is utilized to open the annular groove 16, and the annular groove 16 is utilized to accommodate the annular protrusion 31, so that the material thickness of the penetration welding part of the shell 10, the cover plate 30 and the current collecting disc 40 is thinned, and the welding quality of the three parts is improved.

Further, the peripheral side edge of the collecting tray 40 is in contact with the inner wall of the welding area 14 of the case 10, so that the annular protrusion 31 located in the annular groove 16 is welded with the case 10 as one body while the peripheral side edge of the collecting tray 40 is welded with the inner wall of the welding area 14 of the case 10 at the time of laser penetration welding from the outside of the welding area 14 of the case 10.

Referring to fig. 5 and 6, further, the peripheral edge of the collecting tray 40 is turned over to the same side of the collecting tray 40 to form an annular flange 41. The annular flange 41 is in contact with the inner wall of the welding area 14 of the housing 10, so that the annular projection 31 located in the annular recess 16 is welded to the housing 10 as a unit during laser penetration welding from the outside of the welding area 14 of the housing 10, while the annular flange 41 of the collecting tray 40 is welded to the inner wall of the welding area 14 of the housing 10 as a unit.

Further, the annular flange 41 is an interference fit with the inner wall of the welding area 14 of the housing 10. On the one hand, before welding, the current collecting disc 40 is in interference fit with the inner wall of the welding area 14 of the shell 10 through the annular flanging 41, so that the current collecting disc 40 and the shell 10 are positioned, and welding is convenient; on the other hand, the current collecting disc 40 is in interference fit with the inner wall of the welding area 14 of the shell 10 through the annular flange 41, so that the annular flange 41 is in tight contact with the inner wall of the welding area 14 of the shell 10, and welding is convenient.

With continued reference to fig. 1-4, in some embodiments, the annular end surface 18 includes a first sub-end surface 181 and a second sub-end surface 183. The first sub-end surface 181 is located on a side of the annular groove 16 adjacent to the inner wall of the housing 10 and is connected to the inner wall of the housing 10. The second sub-end surface 183 is located on the side of the annular groove 16 adjacent to the outer wall of the housing 10 and is connected to the outer wall of the housing 10. Wherein the first sub-end surface 181 is flush with the second sub-end surface 183. The cover plate 30 is attached to the first sub-end surface 181 and the second sub-end surface 183, and the annular flange 41 of the cover plate 30 is flush with the outer wall of the housing 10. Thus, the height dimension of the battery cell is the sum of the height dimension of the housing 10 and the thickness dimension of the cover plate 30, and the radial dimension of the battery cell is the radial dimension of the housing 10 (the radial dimension of the housing 10 is equal to the radial dimension of the cover plate 30).

It should be noted that the first sub-end surface 181 and the second sub-end surface 183 are not limited to flush. In other embodiments, as shown in fig. 7, the cover 30 is attached to the first sub-end surface 181, the second sub-end surface 183 is higher than the first sub-end surface 181, and the height difference between the second sub-end surface 183 and the first sub-end surface 181 is equal to the thickness of the cover 30. Thus, the height dimension of the battery cell is the height dimension of the housing 10, and the radial dimension of the battery cell is the radial dimension of the housing 10 (the radial dimension of the cover 30 is smaller than the radial dimension of the housing 10). It should be noted that equality is understood herein to be approximately equal, allowing a certain error range.

It should be noted that the annular recess 16 of the housing 10 is not limited to accommodate the annular protrusion 31 of the cover plate 30. In other embodiments, as shown in fig. 8, the peripheral side edge of the cover plate 30 has an annular projection 31 protruding toward one side of the cover plate 30. The annular projection 31 is in contact with the inner wall of the welding area 14 of the housing 10. The annular collar 41 of the collecting tray 40 contacts the side of the annular projection 31 facing away from the inner wall of the housing 10. That is, the annular protrusion 31 is located between the annular flange 41 of the collecting tray 40 and the inner wall of the welding area 14 of the case 10, so that the annular protrusion 31 is welded to the inner wall of the case 10 as one body while the annular flange 41 of the collecting tray 40 is welded to the annular protrusion 31 at the time of laser penetration welding from the outside of the welding area 14 of the case 10.

In order to avoid that the overlap of the annular flange 41 of the collecting tray 40, the annular protrusion 31 of the cover plate 30 and the welding area 14 of the housing 10 results in too thick material at the welding site to be welded. Further, the case 10 includes a welding region 14 and a non-welding region 19 that is not overlapped with the welding region 14, and the thickness dimension of the welding region 14 of the case 10 is smaller than the thickness dimension of the non-welding region 19. That is, the shell 10 is thinned at the welding area 14, so that the thickness of the material at the welding position is thinned due to superposition of the annular flange 41 of the collecting disc 40, the annular protrusion 31 of the cover plate 30 and the welding area 14 of the shell 10, and the welding quality of laser penetration welding is ensured.

Based on the battery, the utility model further provides electric equipment. The powered device includes a battery cell as described in any of the embodiments above, the powered device utilizing the battery 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:

a housing (10) having an opening (12) and a welding region (14) arranged around the opening (12);

a battery cell assembly (20) housed in the housing (10);

a cover plate (30) disposed at the opening (12); a kind of electronic device with high-pressure air-conditioning system

A current collecting disc (40) arranged between the battery cell assembly (20) and the cover plate (30) and electrically connected with the battery cell assembly (20);

wherein the cover plate (30) and the current collecting disc (40) are partially positioned at the welding area (14) of the shell (10) so as to perform laser penetration welding on the shell (10), the cover plate (30) and the current collecting disc (40) from the outer side of the welding area (14).

2. The battery cell according to claim 1, wherein the housing (10) further has an annular end surface (18), the annular end surface (18) being arranged around the opening (12) and being connected to an inner wall and an outer wall of the housing (10), the annular end surface (18) being provided with an annular groove (16) arranged around the opening (12), the annular groove (16) being located within the welding area (14);

the cover plate (30) is attached to the annular end face (18), an annular protrusion (31) is arranged on one side, facing the annular end face (18), of the cover plate, and the annular protrusion (31) is inserted into the annular groove (16).

3. The battery cell according to claim 2, wherein a peripheral edge of the current collecting plate (40) is in contact with an inner wall of the welding region (14) of the case (10).

4. A battery cell according to claim 3, characterized in that the peripheral edge of the collector plate (40) is turned over to the same side of the collector plate (40) to form an annular flange (41);

the annular collar (41) is in contact with the inner wall of the welding region (14) of the housing (10).

5. The battery cell according to claim 4, characterized in that the annular flange (41) is an interference fit with the inner wall of the welding zone (14) of the housing (10).

6. The battery cell according to claim 2, wherein the annular end face (18) comprises a first sub-end face (181) located at a side of the annular groove (16) close to the inner wall of the housing (10) and a second sub-end face (183) located at a side of the annular groove (16) close to the outer wall of the housing (10);

the first sub-end surface (181) is flush with the second sub-end surface (183), the cover plate (30) is attached to the first sub-end surface (181) and the second sub-end surface (183), and the peripheral edge of the cover plate (30) is flush with the outer wall of the shell (10).

7. The battery cell according to claim 2, wherein the annular end face (18) comprises a first sub-end face (181) located at a side of the annular groove (16) close to the inner wall of the housing (10) and a second sub-end face (183) located at a side of the annular groove (16) close to the outer wall of the housing (10);

the cover plate (30) is attached to the first sub-end surface (181), the second sub-end surface (183) is higher than the first sub-end surface (181), and the height difference between the second sub-end surface (183) and the first sub-end surface (181) is equal to the thickness of the cover plate (30).

8. The battery cell according to claim 1, characterized in that the peripheral edge of the cover plate (30) has an annular projection (31) protruding toward one side of the cover plate (30), the annular projection (31) being in contact with the inner wall of the welding region (14) of the housing (10), the collecting tray (40) being in contact with one side of the annular projection (31) facing away from the inner wall of the housing (10);

the housing (10) further comprises a non-welded region (19) not coinciding with the welded region (14), the thickness of the welded region (14) being smaller than the thickness of the non-welded region (19).

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

10. A powered device comprising the battery of claim 9.