Battery, battery pack and electric device

Abstract

The utility model discloses a battery, a battery pack and an electric device, and belongs to the technical field of batteries. The positive electrode cover plate and the negative electrode cover plate are respectively fixed at two ends of the shell to form an accommodating cavity; the shell comprises a plurality of side walls, at least one side wall is provided with an anti-explosion valve boss, and the anti-explosion valve boss is provided with an anti-explosion hole communicated with the containing cavity; the explosion-proof valve comprises a rupture disk and an explosion-proof valve protection film, the rupture disk is arranged on the side, facing the containing cavity, of the explosion-proof valve boss, the explosion-proof hole is sealed through the rupture disk, and the rupture disk is fixedly connected with the shell in a welded mode; the anti-explosion valve protection film is arranged on the outer side of the anti-explosion valve boss and seals the anti-explosion hole. The design of the explosion-proof valve boss provides a space for the installation of the explosion-proof valve, increases the strength of the shell, increases the stability of the explosion-proof valve, is also beneficial to the release of the welding stress of the explosion-proof valve, and ensures the stability and reliability of the explosion-proof valve, thereby ensuring the safety performance of the battery.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery, a battery pack and an electric device. Background Art

[0002] With the rapid development of new energy, power batteries are more and more widely used. With the concepts of extreme performance, extreme safety and extreme cost put forward, the extreme safety performance of the battery cell is closely related to the safety of the whole vehicle and consumers. The pressure relief rate, pressure relief direction, etc. of the pressure relief mechanism (i.e., explosion-proof valve) of the battery cell are crucial to the safety performance of the battery cell. At present, the explosion-proof valve of the battery cell is generally arranged on the cover plate and in the same direction as the positive and negative electrode posts. When the explosion-proof valve is opened, a large amount of high-temperature, high-humidity and highly corrosive gas, liquid or solid material sprays out from the explosion-proof valve, which is very easy to contact the positive and negative electrode posts of adjacent battery cells or modules, triggering further short circuits and causing the entire battery to get out of control.

[0003] To improve the safety of the battery, the design position of the explosion-proof valve begins to shift from the cover plate to the side or bottom of the housing. To improve stability, the wall thickness of the surface of the housing where the explosion-proof valve is arranged needs to be increased accordingly, which increases the weight of the housing, reduces the internal space of the battery cell, and greatly reduces the energy density of the battery cell. In addition, it is very difficult to set reinforcing ribs in the explosion-proof valve holes at the position of the traditional side explosion-proof valve. During the welding or use of the explosion-proof valve, the housing is prone to deformation, resulting in micro-cracks in the explosion-proof valve, etc., the stability becomes poor, and the safety performance of the battery cell is reduced. Summary of the Utility Model

[0004] To solve the deficiencies of the prior art, the purpose of the utility model is to provide a battery, a battery pack and an electric device. In the battery provided by the utility model, the explosion-proof valve is arranged on the side of the electrode core, away from the cover plate electrode post, so as to achieve thermal-electric separation and improve the safety performance of the electrode core and the module.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] In the first aspect of the utility model, a battery is provided, including:

[0007] A housing, including a plurality of side walls, the plurality of side walls are connected to each other to enclose a receiving cavity, an electrode core is arranged in the receiving cavity, an explosion-proof valve boss is arranged on one of the side walls, and the explosion-proof valve boss is provided with an explosion-proof hole communicating with the receiving cavity;

[0008] An explosion-proof valve, including a bursting disc and an explosion-proof valve protective film, the bursting disc is arranged on the side of the explosion-proof valve boss facing the receiving cavity, the bursting disc seals the explosion-proof hole, and the bursting disc is fixedly connected to the housing; the explosion-proof valve protective film is arranged outside the explosion-proof valve boss, and the explosion-proof valve protective film seals the explosion-proof hole.

[0009] In some embodiments of the present utility model, the battery includes two cover plates and a housing. The housing includes four side walls, and the material of the side walls is metal. The metal sheet is formed into a housing with both ends open by means of roll bending or bending and then welding. The two cover plates are respectively fixed at both ends of the housing. The four side walls are divided into two large side walls and two small side walls according to the area. The welding seam is arranged on the small side wall, and the explosion-proof valve boss is arranged on the small side wall without the welding seam.

[0010] In some embodiments of the present utility model, the material of the explosion-proof valve protective film is plastic, and the explosion-proof valve protective film is fixed to the housing by means of pasting;

[0011] The bursting disc is fixedly connected to the housing by means of welding.

[0012] In some embodiments of the present utility model, the wall thickness of the side walls is consistent, all being 0.2 - 0.5 mm.

[0013] In some embodiments of the present utility model, the explosion-proof hole is runway-shaped, the bursting disc is runway-shaped, and the periphery of the runway-shaped bursting disc overlaps with the inner wall of the explosion-proof valve boss; the width of the explosion-proof hole is less than the total thickness of the battery.

[0014] In some embodiments of the present utility model, the bursting disc includes a lapping area and a thinning area from outside to inside. The lapping area is partially fixed to the explosion-proof valve boss, and there are score marks in the thinning area. In the width direction of the explosion-proof valve, the total width of the lapping area of the bursting disc is greater than or equal to 1.5 mm, and the width of the groove of the explosion-proof valve boss is greater than the width of the bursting disc.

[0015] In some embodiments of the present utility model, in the width direction of the explosion-proof valve, the width of the groove of the explosion-proof valve boss is greater than the width of the bursting disc by at least 0.5 mm on one side;

[0016] In the length direction of the explosion-proof valve, the difference between the length of the groove of the explosion-proof valve boss and the length of the bursting disc is greater than the difference in width in the width direction, and there are gaps between the two ends of the groove of the explosion-proof valve boss and the bursting disc.

[0017] In some embodiments of the present utility model, the inner surface of the bursting disc is lower than the inner surface of the housing.

[0018] In the second aspect of the present utility model, a battery pack is provided. The battery pack includes the battery as described in the first aspect.

[0019] In the third aspect of the present utility model, an electrical device is provided. The electrical device includes the battery as described in the first aspect, or includes the battery pack as described in the second aspect.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] The battery provided by the present utility model improves the structure of the housing by setting an explosion-proof valve boss. The design of this bulging structure, on the one hand, provides space for the installation of the explosion-proof valve; on the other hand, it strengthens the strength of the installation position of the explosion-proof valve, reduces the deformation at this position, increases the stability of the explosion-proof valve, increases the strength of the housing, and avoids the cracking and failure of the rupture disk due to the deformation of the rupture disk or the housing; on the other hand, this structure is conducive to releasing the stress during the welding of the explosion-proof valve, further improving the stability and safety performance of the explosion-proof valve. The structure of the installation position of the explosion-proof valve (i.e., the explosion-proof valve boss) protrudes outward from the housing, does not occupy the internal space of the battery, the energy density is not affected by the side explosion-proof valve, and during the PACK design, the design of the exhaust channel can easily leave space for the outwardly protruding explosion-proof valve. Therefore, this outward bulging structure has beneficial effects on both the inside and outside of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The attached drawings forming a part of this specification are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0023] Figure 1 It is a schematic structural diagram of a battery provided in an embodiment of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of a housing of a battery provided in an embodiment of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of a housing of a battery provided in an embodiment of the present utility model;

[0026] Figure 4 It is a cross-sectional view in the width direction of an explosion-proof valve boss of a battery provided in an embodiment of the present utility model;

[0027] Figure 5 It is a cross-sectional view in the width direction of an explosion-proof valve of a battery provided in an embodiment of the present utility model;

[0028] Figure 6 It is a cross-sectional view in the length direction of an explosion-proof valve of a battery provided in an embodiment of the present utility model.

[0029] Among them, 1. Battery, 10. Housing, 20. Cover plate, 30. Explosion-proof valve, 101. Large side surface A of the housing, 102. Large side surface B of the housing, 103. Small side surface A of the housing, 104. Small side surface B of the housing, 105. Weld seam, 1031. Explosion-proof valve boss, 1032. Explosion-proof valve boss groove, 1033. Explosion hole, 301. Rupture disk, 302. Explosion-proof valve protective film.

[0030] W1 is the width of the explosion-proof hole; W2 is the width along the width direction of the explosion-proof valve, where the convex groove of the explosion-proof valve can be lapped by the rupture disc; W3 is the width of the thinning area of the rupture disc along the width direction of the explosion-proof valve; W4 is the minimum distance between the notch and the edge of the thinning area; W5 is the total width of the rupture disc; L1 is the length along the length direction of the explosion-proof valve, where the convex groove of the explosion-proof valve can be lapped by the rupture disc; L2 is the distance between the edge of the convex groove of the explosion-proof valve and the edge of the rupture disc; H1 is the wall thickness of the housing; H2 is the wall thickness of the convex platform of the explosion-proof valve; H3 is the depth of the groove for installing the rupture disc in the convex platform of the explosion-proof valve; H4 is the thickness of the welding part on the rupture disc; H5 is the height of the convex platform of the explosion-proof valve. Detailed implementation mode

[0031] The convex groove of the explosion-proof valve refers to the groove where the installation position of the rupture disc is located in the convex platform of the explosion-proof valve.

[0032] In order to enable those skilled in the art to more clearly understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments.

[0033] Please refer to Figures 1 to 6 , Figure 1 which is a schematic structural diagram of a battery provided in an embodiment of the present invention, Figure 2 which is a schematic structural diagram of the housing of a battery provided in an embodiment of the present invention, Figure 3 which is a schematic structural diagram of the housing of a battery provided in an embodiment of the present invention, Figure 4 which is a cross-sectional view of the width direction of the convex platform of the explosion-proof valve of a battery provided in an embodiment of the present invention, Figure 5 which is a cross-sectional view of the width direction of the explosion-proof valve of a battery provided in an embodiment of the present invention, Figure 6 which is a cross-sectional view of the length direction of the explosion-proof valve of a battery provided in an embodiment of the present invention.

[0034] Embodiment 1

[0035] A battery provided in this embodiment improves its housing structure by setting a convex platform for the explosion-proof valve. The design of this bulging structure, on the one hand, provides space for the installation of the explosion-proof valve; on the other hand, it strengthens the strength of the housing at the explosion-proof valve position, reduces the deformation at this position, and increases the stability of the explosion-proof valve; on the further hand, this structure is beneficial to the release of the welding stress of the explosion-proof valve, further improving the stability and safety performance of the explosion-proof valve. The convex platform of the explosion-proof valve protrudes outward, does not occupy the internal space of the electrode core, and the energy density is not affected by the side explosion-proof valve. And when designing the PACK, the design of the exhaust channel can easily leave space for the outwardly protruding explosion-proof valve. Therefore, this outwardly bulging structure has beneficial effects on both the inside and outside of the electrode core.

[0036] Refer to Figures 1 to 6As shown, the battery 1 of this embodiment includes: a housing 10, a cover plate 20, and an explosion-proof valve 30. It can be understood that the battery 1 of this embodiment further includes a battery core. Since the battery core is disposed inside the housing 10 and cover plates 20 are provided at both ends of the battery core, it is not shown in the figure.

[0037] The housing 10 includes four side walls. The cover plate 20, which has important sealing and safety performance, is an important component of the battery. There are two cover plates 20, namely a positive cover plate and a negative cover plate respectively. The positive cover plate is connected to the positive tab of the battery core for leading out the positive current. The negative cover plate is connected to the negative tab of the battery core for leading out the negative current.

[0038] The four side walls of the housing 10 are made of metal. The side walls can be a steel shell or an aluminum shell; the steel shell can be stainless steel, nickel-plated steel, etc., and the aluminum shell can be 3003 aluminum, 3006 aluminum, etc. The side walls made of metal endow the battery with a certain strength, which can ensure the service life and stability of the battery. The metal plate is formed into a structure with two open ends by means of roll bending or bending and then welding. The two cover plates are respectively fixed at both ends to enclose a receiving cavity. The receiving cavity is used to place the battery core. Specifically, the metal plate is processed and formed by bending or roll bending, and then welded at the overlapping edge to form a weld seam on the side of the housing 10 with a structure with two open ends. This way of forming the housing can use a thinner plate for processing and forming, which is beneficial to improving the energy density of the battery.

[0039] An explosion-proof valve boss 1031 is provided on one of the side walls. The explosion-proof valve boss 1031 is provided with an explosion-proof hole 1033 communicating with the receiving cavity.

[0040] As Figures 1 to 3 As shown, the housing 10 is rectangular parallelepiped-shaped. The housing 10 has a total of four side walls. The four side walls are divided into two large side walls (housing large side wall A 101, housing large side wall B 102) and two small side walls (housing small side wall A 103, housing small side wall B 104) according to the area. The side walls with the same area are arranged opposite to each other, and the large side walls and the small side walls are respectively perpendicular to each other. The weld seam 105 is provided on the housing small side wall B 104, and the explosion-proof valve boss 1031 is provided on the housing small side wall A 103 without a weld seam. And the wall thicknesses of the four side walls are consistent and uniform, all being 0.2 - 0.5 mm.

[0041] It can be understood that at least one explosion-proof valve boss 1031 is provided on the housing small side wall A 103 without a weld seam. In some other embodiments, a plurality of explosion-proof valve bosses 1031 are provided on the housing small side wall A 103 without a weld seam, and the plurality of explosion-proof valve bosses 1031 are arranged at intervals. The battery includes a plurality of explosion-proof valves 30, and each explosion-proof valve 30 is correspondingly arranged inside one explosion-proof valve boss 1031 to seal one explosion-proof hole 1033.

[0042] It can be understood that the explosion-proof valve boss 1031 and the explosion-proof hole 1033 are formed by stamping the housing 10 from the inside outwards, with high processing efficiency and yield. After stamping, the explosion-proof valve boss 1031 and the explosion-proof hole 1033 are formed. In addition, an explosion-proof valve boss groove 1032 for installing the rupture disk 301 is formed on the inner side of the housing 10, and correspondingly, an explosion-proof valve boss 1031 is formed on the outer side of the housing 10. The design of this bulging structure, on the one hand, provides space for the installation of the rupture disk 301; on the other hand, it strengthens the strength of the position of the explosion-proof valve 30, reduces the deformation at this position, increases the stability of the explosion-proof valve 30, increases the strength of the housing 10, and avoids the rupture disk 301 from cracking and failing due to the deformation of the rupture disk 301 or the housing 10; furthermore, this structure is beneficial to releasing the stress during the welding of the rupture disk 301, and further improves the stability and safety performance of the explosion-proof valve 30. The structure of the position of the explosion-proof valve 30 (i.e., the explosion-proof valve boss 1031) protrudes outwards from the housing 10, does not occupy the internal space of the battery, the energy density is not affected by the side explosion-proof valve 30, and during the PACK design, the design of the exhaust channel can easily leave space for the outwardly protruding explosion-proof valve 30. Therefore, this outwardly bulging structure has beneficial effects on both the inside and outside of the battery.

[0043] The explosion-proof valve 30 includes a rupture disk 301 and an explosion-proof valve protective film 302. The rupture disk 301 is arranged on the side of the explosion-proof valve boss 1031 facing the accommodation cavity, that is, inside the explosion-proof valve boss groove 1032. The rupture disk 301 seals the explosion-proof hole 1033, and the rupture disk 301 is fixedly connected to the housing 10 by welding; the explosion-proof valve protective film 302 is arranged on the outer side of the explosion-proof valve boss 1031, and the explosion-proof valve protective film 302 seals the explosion-proof hole 1033. This kind of explosion-proof valve 30 is arranged on the side of the electrode core, away from the cover pole, and can achieve thermoelectric separation, improving the safety performance of the battery and the module.

[0044] Furthermore, the material of the explosion-proof valve protective film 302 is plastic, and the explosion-proof valve protective film 302 is fixedly connected to the housing 10 by pasting. For example, the explosion-proof valve protective film 302 is pasted to the outer side of the housing 10 through a pressure-sensitive adhesive, corresponding to the rupture disk 301 up and down, to protect the explosion-proof valve 30 from being damaged during the manufacturing process.

[0045] In this embodiment, there is no requirement for the shape of the explosion-proof valve 30. The explosion-proof valve 30 can be in various shapes such as circular, racetrack-shaped, etc. As Figure 1 or Figure 2 shown, in this embodiment, taking the racetrack-shaped explosion-proof valve as an example, the dimensions of the explosion-proof valve 30 and the explosion-proof valve boss 1031 are described in detail.

[0046] The explosion-proof valve 30 is runway-shaped, and the corresponding explosion-proof holes 1033 and rupture discs 301 are also runway-shaped (i.e., runway-type rupture discs). The runway-type rupture discs are installed in the explosion-proof valve boss grooves 1032 of the housing 10 to seal the explosion-proof holes 1033. As Figure 4 and Figure 5 shown, the width of the explosion-proof hole 1033 is W1, and W1 ≤ 2 / 3 of the total battery thickness, providing a channel and space for the rupture disc 301 to open. Along the width direction of the explosion-proof valve 30, the width of the explosion-proof valve boss groove 1032 for the rupture disc 301 to overlap is W2, and W2 ≥ 0.5 mm.

[0047] The runway-type rupture disc includes an overlapping area and a thinning area from outside to inside. The overlapping area is fixed to the explosion-proof valve boss 1031, and there are score marks in the thinning area. It can be understood that the rupture disc 301 is a safety protection device for the battery, used to prevent the battery from exploding or catching fire. The score mark design is used to ensure that in abnormal situations, the rupture disc opens in time, relieves the internal pressure and releases gas, preventing the battery from exploding.

[0048] Along the width direction of the explosion-proof valve 30, the total width of the overlapping area of the rupture disc 301 is greater than or equal to 1.5 mm, and the width of the explosion-proof valve boss 1031 is greater than the width of the rupture disc 301. The width of the thinning area in the rupture disc 301 is W3. The minimum distance between the score mark and the edge of the thinning area (i.e., the safety distance of the score mark) is W4, and W4 ≥ 0.3 mm. Because the rupture disc 301 is connected to the housing 10 by welding, the welding process will be affected by heat radiation, stress, etc., and a certain safety distance must be provided for the score mark to be unaffected. The total width of the rupture disc 301 is W5. It satisfies W3 < W5 < W1 + 2W2, and W5 - W3 ≥ 1.5 mm.

[0049] In the length direction of the explosion-proof valve, the difference in length between the explosion-proof valve boss groove 1032 and the rupture disc 301 is greater than the difference in width in the width direction, and there are gaps between the two ends of the explosion-proof valve boss groove 1032 and the rupture disc 301. Specifically, as Figure 6 shown, along the length direction of the explosion-proof valve 30, the length of the explosion-proof valve boss groove 1032 for the rupture disc 301 to overlap is L1, and L1 ≥ W2. In the overlapping part of the explosion-proof valve boss groove 1032 and the rupture disc 301, the non-overlapping length is L2, and L2 ≥ 0.8 mm. The position corresponding to L2 is the placement area of the tooling fixture during the welding process of the rupture disc 301, used to fix the rupture disc 301 and achieve the welding positioning of the rupture disc 301.

[0050] The inner surface of the rupture disc 301 is lower than the inner surface of the housing 10. Specifically, as Figure 4 and Figure 5As shown in the figure, H1 is the wall thickness of the housing; H2 is the wall thickness of the explosion-proof valve boss 1031. The installation depth of the bursting disc 301 in the explosion-proof valve boss 1031 is H3, the thickness of the welding part on the bursting disc 301 is H4, and the height of the explosion-proof valve boss 1031 is H5. It satisfies H1 = H2 < H3, H3 = H5, and H3 - H4 ≥ 0.3 mm. The structural design of the battery in this embodiment can ensure the normal installation of the bursting disc 301, and the inner surface of the bursting disc 301 is lower than the inner surface of the housing 10 and sinks inside the explosion-proof valve boss groove 1032. During the battery assembly process, the electrode core will not contact the bursting disc 301, reducing the mutual damage between the electrode core and the bursting disc 301. In addition, during the battery use process, the electrode core will not contact the bursting disc 301 due to vibration, and the mutual damage between the electrode core and the bursting disc is also reduced.

[0051] On the one hand, the battery in this embodiment has a thinner housing, which improves the energy density. On the other hand, the design of the housing convex is used to improve the strength of the housing, reduce the welding stress of the bursting disc, protect the bursting disc, and improve the reliability and safety performance of the explosion-proof valve. On the other hand, by separating the explosion-proof valve from the pole column, thermoelectric separation is achieved, improving the safety performance of the battery.

[0052] Embodiment 2

[0053] This embodiment provides a battery pack, and the battery pack includes the battery as described in Embodiment 1. It can be understood that the battery pack includes the functions of the battery described in the above embodiments, and will not be elaborated here.

[0054] Embodiment 3

[0055] This embodiment provides an electrical device, and the electrical device includes the battery as described in Embodiment 1, or includes the battery pack as described in Embodiment 2. The battery or battery pack is used to supply power to the electrical device, and the electrical device can be various types of devices such as new energy vehicles, computers, energy storage power supply devices, etc. It can be understood that the electrical device includes the functions of the battery or battery pack described in the above embodiments, and will not be elaborated here.

[0056] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0057] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery, characterized in that: include: The shell comprises a plurality of side walls, which are connected to each other to form an accommodating cavity, in which a pole core is arranged, one of the side walls is provided with an explosion-proof valve boss, and the explosion-proof valve boss is provided with an explosion-proof hole communicating with the accommodating cavity; The explosion-proof valve comprises a bursting disc and an explosion-proof valve protective membrane. The bursting disc is arranged on the side of the explosion-proof valve boss facing the accommodating cavity, the bursting disc seals the explosion-proof hole, and the bursting disc is fixedly connected to the shell; the explosion-proof valve protective membrane is arranged on the outer side of the explosion-proof valve boss, and the explosion-proof valve protective membrane seals the explosion-proof hole.

2. The battery according to claim 1, characterized in that The battery includes two cover plates and a shell, the shell includes four side walls, and the material of the side walls is metal; the metal sheet is formed by roll bending or bending and then welded to form a shell with a two-end through structure, and the two cover plates are respectively fixed at the two ends of the shell; the four side walls are divided into two large side walls and two small side walls according to the area, the welding seam is set on the small side wall, and the explosion-proof valve boss is set on the small side wall without a welding seam.

3. The battery according to claim 1, characterized in that The explosion-proof valve protective film is made of plastic, and the explosion-proof valve protective film is fixed to the housing by gluing; The bursting disc is fixedly connected to the shell by welding.

4. The battery according to claim 1, characterized in that The wall thickness of the side walls is consistent, both being 0.2-0.5 mm.

5. The battery according to claim 1, characterized in that The explosion-proof hole is in the shape of a runway, and the bursting disc is a runway-type bursting disc. The four sides of the runway-type bursting disc overlap with the inner wall of the explosion-proof valve boss; the width of the explosion-proof hole is smaller than the total thickness of the battery.

6. The battery according to claim 5, characterized in that The bursting disc is composed of an overlapping area and a thinning area from the outside to the inside. The overlapping area is fixed to the explosion-proof valve boss, and a notch is provided in the thinning area. In the width direction of the explosion-proof valve, the total width of the overlapping area of ​​the bursting disc is greater than or equal to 1.5 mm, and the width of the groove of the explosion-proof valve boss is greater than the width of the bursting disc.

7. The battery according to claim 6, characterized in that In the width direction of the explosion-proof valve, the width of the groove of the explosion-proof valve boss is greater than or equal to 0.5mm on one side of the width of the bursting disc; In the length direction of the explosion-proof valve, the difference between the length of the explosion-proof valve boss groove and the length of the bursting disc is greater than the difference in width in the width direction, and gaps are provided between the two ends of the explosion-proof valve boss groove and the bursting disc.

8. The battery according to claim 1, characterized in that The inner surface of the bursting disc is lower than the inner surface of the shell.

9. A battery pack, characterized in that: The battery pack comprises a battery as described in any one of claims 1-8.

10. An electrical device, characterized in that: The electrical device comprises a battery as described in any one of claims 1-8, or comprises a battery pack as described in claim 9.

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