Battery cells, casing, battery and electrical device

Abstract

This utility model belongs to the field of battery technology and discloses a battery cell, a casing, a battery, and an electrical device. The battery cell includes a casing, a cell, and a support member. The casing includes a first wall and a second wall connected to each other. The area of ​​the first wall is larger than the area of ​​the second wall. The first wall has a center line extending along a second direction, which is the height direction of the first wall. The cell is disposed inside the casing. The support member is disposed between the first wall and the cell. The orthographic projection area S of the support member on the first wall is spaced apart from the center line. This utility model can improve the uniformity of internal pressure distribution in the battery, reduce internal stress concentration, reduce the risk of lithium plating, and has high safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery cell, casing, battery, and electrical device. Background Technology

[0002] During normal charge and discharge cycles, a certain amount of expansion force is generated inside the battery cell. In the later stages of the cycle, the side reactions of the electrolyte increase, and gas is generated inside the battery cell, which further aggravates the expansion of the battery cell.

[0003] In existing technologies, a battery cell includes a casing and a cell housed within the casing. The expansion of a battery cell is primarily characterized by greater expansion in the central region and less expansion in the lateral regions. In a battery module or pack, multiple battery cells are placed side-by-side. Adjacent cells mutually inhibit each other's expansion, resulting in greater pressure on the central region of the cell and less pressure on the lateral regions. This uneven pressure distribution leads to stress concentration within the battery cell, increasing the risk of lithium plating and resulting in lower battery cell safety.

[0004] Therefore, there is an urgent need for a battery cell, casing, battery, and electrical device that can improve the internal pressure distribution of the battery cell and reduce lithium plating. Utility Model Content

[0005] The first objective of this invention is to provide a battery cell that solves the technical problems of uneven pressure distribution and easy lithium plating in the prior art.

[0006] The second objective of this invention is to provide a housing that solves the technical problem in the prior art of failing to better support the battery cell.

[0007] The third objective of this invention is to provide a battery that solves the technical problem of low safety performance in the prior art.

[0008] The fourth objective of this utility model is to provide an electrical device to solve the technical problems of low safety and reliability in the prior art.

[0009] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0010] Battery cells, including:

[0011] The shell includes a first wall and a second wall that are connected to each other, the area of ​​the first wall is larger than the area of ​​the second wall, and the first wall has a centerline extending along a second direction, the second direction being the height direction of the first wall;

[0012] The battery cell is located inside the housing;

[0013] A support member is disposed between the first wall and the battery cell, and there is a gap between the orthographic projection area of ​​the support member on the first wall and the center line.

[0014] In one embodiment, the surface of the support member facing the battery cell is an arc surface;

[0015] And / or, the support member is a plate-like structure.

[0016] In one embodiment, at least a portion of the support member gradually increases in size in a third direction along the center line pointing towards the support member, wherein the third direction is the thickness direction of the first wall.

[0017] In one embodiment, there are two first walls, which are arranged opposite each other in the third direction, and the distance between the two opposing surfaces of the two first walls is n;

[0018] The maximum value of the dimension of the support member in the third direction is x1, and satisfies: x1≤5%n; the minimum value of the dimension of the support member in the third direction is x2, and satisfies: 0<x2≤2.5%n.

[0019] In one embodiment, the maximum dimension of the orthographic projection area of ​​the support member on the first wall in the first direction is e, and the dimension of the shell in the first direction is b, wherein e and b satisfy the relationship: 10%b≤e≤25%b; wherein the first direction is the length direction of the first wall;

[0020] And / or,

[0021] The maximum dimension of the orthographic projection area of ​​the support member on the first wall in the second direction is h1, and the dimension of the shell in the second direction is h2, wherein h1 and h2 satisfy the relationship: 50%h2≤h1≤h2;

[0022] And / or,

[0023] The minimum distance between the orthographic projection area of ​​the support member on the first wall and the center line is L, and the dimension of the shell in the first direction is b, wherein L and b satisfy the relationship: L = (3% - 49%)b.

[0024] In one embodiment, the minimum distance between the orthographic projection area of ​​the support member on the first wall and the second wall is d, the dimension of the shell in the first direction is b, and d and b satisfy the relationship: d = (8% - 12%)b; and / or, the value of d ranges from 5mm to 20mm;

[0025] And / or,

[0026] The minimum distance between the orthographic projection area of ​​the support member on the first wall and the edge of the top of the shell is h3, the dimension of the shell in the second direction is h2, and h3 and h2 satisfy the relationship: h3 = (20% - 60%)h2; and / or, the value of h3 is in the range of 8mm-150mm.

[0027] In one embodiment, the support member includes at least two sub-support members; the at least two sub-support members are spaced apart along a first direction; or, the at least two sub-support members are spaced apart along a second direction; wherein, the first direction is the length direction of the first wall.

[0028] In one embodiment, at least two of the sub-support members are spaced apart along the first direction, the dimension of the sub-support member in the second direction is p, the distance between two adjacent sub-support members in the first direction is q, and q and p satisfy the relationship: 10%p≤q≤50%p; and / or, the value of p is in the range of 5mm-100mm;

[0029] or,

[0030] At least two of the sub-support members are spaced apart along the second direction; the dimension of the sub-support member in the first direction is z, and the distance between two adjacent sub-support members in the second direction is y, where y and z satisfy the relationship: 50% z ≤ y ≤ z; and / or, the value of z is in the range of 5mm-100mm.

[0031] In one embodiment, the battery cell has a curved portion and a straight portion. Along a third direction, on a dummy plane perpendicular to the third direction, the orthographic projection of the support member coincides with the orthographic projection of the curved portion; wherein, the third direction is the thickness direction of the first wall.

[0032] In one embodiment, the support member is separately disposed from the first wall; or, the support member and the first wall are integrally formed as a single structure.

[0033] In one embodiment, the battery cell includes a battery cell body and an insulating film covering the battery cell body;

[0034] The support member is connected to the insulating film; or, the support member and the insulating film are an integrally formed structure.

[0035] The housing includes:

[0036] A first wall and a second wall are connected to each other, the area of ​​the first wall is larger than the area of ​​the second wall, and the first wall has a centerline extending along a second direction, the second direction being the height direction of the first wall;

[0037] A support member is connected to the first wall, and there is a gap between the orthographic projection area of ​​the support member on the first wall and the center line.

[0038] The housing includes: a first wall and a second wall connected to each other, the area of ​​the first wall being larger than the area of ​​the second wall, the first wall having a center line extending along a second direction, the second direction being the height direction of the first wall; the surface of the housing near the battery cell protrudes in the direction toward the battery cell, and the surface away from the battery cell is correspondingly recessed to form a support member; the orthographic projection area of ​​the support member on the first wall is spaced apart from the center line.

[0039] The battery includes a battery cell as described above; or the battery includes a casing as described above.

[0040] An electrical device may include a battery cell as described above; or, the electrical device may include a housing as described above; or, the electrical device may include a battery as described above.

[0041] The beneficial effects of this utility model are:

[0042] The battery cell provided by this utility model has a casing including a first wall and a second wall. The area of ​​the first wall is larger than that of the second wall, allowing the first wall to face the surface with a larger cell area. A support member is provided between the first wall and the cell, and there is a gap between the orthographic projection area of ​​the support member and the center line of the first wall. When the cell expands, the area of ​​the cell with a larger expansion amplitude directly contacts the first wall, while the area of ​​the cell with a smaller expansion amplitude contacts the support member. Since the support member has a certain thickness, the difference between the pressure on the part of the cell that contacts the first wall and the pressure on the part of the cell that contacts the support member is reduced, resulting in a more uniform pressure distribution in the cell. This reduces the risk of stress concentration in the cell, thereby reducing the risk of lithium plating and improving the reliability of the battery cell under high power output and high impact environments, thus improving the safety of the battery cell.

[0043] The housing provided by this utility model has a wide range of functions.

[0044] The battery provided by this invention can reduce the risk of lithium plating and has high reliability and safety.

[0045] The electrical device provided by this utility model has high reliability and safety. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the structure of a battery cell provided in an embodiment of the present invention;

[0048] Figure 2 This is an exploded view of a battery cell provided in an embodiment of the present invention;

[0049] Figure 3 This is a first cross-sectional view of a battery cell without a cell shown, provided in an embodiment of the present invention;

[0050] Figure 4 This is a front view of a first type of battery cell without a displayed cell, provided in an embodiment of this utility model;

[0051] Figure 5 This is a second cross-sectional view of a first type of battery cell (without showing the battery cell) provided in an embodiment of the present invention;

[0052] Figure 6 This is a schematic diagram of the structure of a second type of battery cell (without a cell shown) provided in an embodiment of the present invention;

[0053] Figure 7 This is a cross-sectional view of a second type of battery cell (without showing the battery cell) provided in an embodiment of the present invention;

[0054] Figure 8 This is a cross-sectional view of a third type of battery cell (without showing the battery cell) provided in an embodiment of this utility model;

[0055] Figure 9 This is a schematic diagram of the structure of a fourth type of battery cell (without a cell shown) provided in an embodiment of this utility model;

[0056] Figure 10 This is a cross-sectional view of a fourth type of battery cell without a visible cell, provided in one embodiment of this utility model;

[0057] Figure 11This is a partially enlarged top view of a fourth type of battery cell (without showing the battery cell) provided in an embodiment of this utility model;

[0058] Figure 12 This is a structural schematic diagram of a fifth type of battery cell (without a cell shown) provided in an embodiment of this utility model;

[0059] Figure 13 This is a cross-sectional view of a fifth type of battery cell (without showing the battery cell) provided in an embodiment of this utility model;

[0060] Figure 14 This is a partially enlarged top view of a fifth type of battery cell (without a cell shown) provided in an embodiment of this utility model;

[0061] Figure 15 This is a schematic diagram of the structure of a sixth type of battery cell (without a cell shown) provided in an embodiment of this utility model;

[0062] Figure 16 This is a cross-sectional view of a sixth type of battery cell (without a cell shown) provided in an embodiment of this utility model.

[0063] In the picture:

[0064] 100, Housing; 110, First wall; 111, Centerline; 120, Second wall; 200, Battery cell; 210, Bending section; 220, Straight section; 300, Support member; 310, Sub-support member; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0065] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0066] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0067] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0068] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0069] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0070] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0071] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0072] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0073] Example 1

[0074] This embodiment provides a battery cell that can improve internal pressure distribution, reduce the risk of lithium plating, and has high safety.

[0075] For example, such as Figure 1 and Figure 2 As shown, a single battery cell includes a housing 100, a battery cell 200, and a support member 300. Both the battery cell 200 and the support member 300 are located inside the housing 100.

[0076] like Figure 2 As shown, the housing 100 includes a first wall 110 and a second wall 120 connected to each other. The area of ​​the first wall 110 is larger than the area of ​​the second wall 120. Optionally, the battery cell is typically rectangular in shape and has a large facet and a small facet, wherein the first wall 110 corresponds to the large facet of the battery cell, and the second wall 120 corresponds to the small facet of the battery cell.

[0077] like Figure 3 As shown, the first wall 110 has a centerline 111 extending along the second direction Y, and the centerline 111 passes through the center of the first wall 110 in the first direction X. The second direction Y is the height direction of the first wall 110, i.e., the height direction of the battery cell, the casing 100, or the cell 200; the first direction X is the length direction of the first wall 110, i.e., the length direction of the battery cell, the casing 100, or the cell 200. This embodiment also defines a third direction Z, where the third direction Z is the thickness direction (i.e., the width direction) of the first wall 110, i.e., the thickness direction (i.e., the width direction) of the battery cell, the thickness direction (i.e., the width direction) of the casing 100, or the thickness direction (i.e., the width direction) of the cell 200. Any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0078] In this embodiment, the battery cell 200 is disposed within the housing 100, and the support member 300 is also disposed within the housing 100. In this embodiment, the support member 300 is disposed between the first wall 110 and the battery cell 200, and there is a gap between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111. That is, the support member 300 is not disposed between the center of the battery cell 200 and the first wall 110, but rather has a certain distance between it and the center of the battery cell 200. By providing the support member 300, the battery cell 200 can be supported, thereby reducing the risk of lithium plating in the battery cell 200 due to uneven stress.

[0079] It should be noted that the orthographic projection area S of the support member 300 on the first wall 110 can be understood as the area where the orthographic projection of the support member 300 on the first wall 110 is located. The area of ​​the orthographic projection area S can be the same as or greater than the cross-sectional area of ​​the support member 300. This embodiment does not limit this.

[0080] The battery cell provided in this embodiment has a casing 100 including a first wall 110 and a second wall 120. The area of ​​the first wall 110 is larger than the area of ​​the second wall 120, so that the first wall 110 can face the larger surface area of ​​the cell 200. A support member 300 is provided between the first wall 110 and the cell 200, and the support member 300 has a gap between the projected area S of the first wall 110 and the center line 111 of the first wall 110. When the cell 200 expands, the area of ​​the cell 200 with a larger expansion amplitude directly contacts the first wall 110. In the contact area, the region of the cell 200 with a smaller expansion amplitude contacts the support member 300. Since the support member 300 has a certain thickness, the pressure difference between the part of the cell 200 in contact with the first wall 110 and the part of the cell 200 in contact with the support member 300 is reduced, making the pressure distribution of the cell 200 more uniform, reducing the risk of stress concentration in the cell 200, thereby reducing the risk of lithium plating, improving the reliability of the battery cell under high power output and high impact environments, and thus improving the safety of the battery cell.

[0081] To prevent the support member 300 from damaging the battery cell 200, in some optional embodiments, the support member 300 is made of an elastic material, such as silicone or rubber. It is understood that the support member 300 can also be made of a plastic material, such as plastic. It is also understood that the support member 300 is formed by a rigid outer elastic structure; this embodiment does not limit this.

[0082] Optionally, such as Figure 3As shown, the maximum dimension of the orthographic projection area S of the support member 300 on the first wall 110 in the first direction X is e, and the dimension of the shell 100 in the first direction X is b, that is, the length of the shell 100 is b. Here, e and b satisfy the relationship: 10%b≤e≤25%b. The first direction X is the length direction of the first wall 110, meaning that the dimension of the support member 300 in the first direction X occupies 10%-25% of the length of the shell 100. This arrangement ensures that the dimension of the support member 300 in the first direction X can better support the portion of the cell 200 with a smaller expansion amplitude, and that the dimension of the support member 300 is not too large, so as not to affect the direct contact between the portion of the cell 200 with a larger expansion amplitude and the first wall 110. Furthermore, the dimension of the support member 300 is not too large, ensuring that its weight is not excessive. This balances the uniformity of force on the cell 200 while meeting the lightweight requirements of the battery cell.

[0083] It should be noted that the maximum dimension e of the orthographic projection area S of the support member 300 on the first wall 110 in the first direction X cannot be too large. If it is too large, the support member 300 will be wider, extending into the central region of the battery cell 200 (i.e., the region where the battery cell 200 expands significantly). This will increase the pressure on the central region of the battery cell 200, leading to stress concentration and a higher likelihood of lithium plating. Furthermore, a wider support member 300 will also result in a heavier battery cell. Conversely, the maximum dimension e of the orthographic projection area S of the support member 300 on the first wall 110 in the first direction X cannot be too small. If it is too small, the contact area between the support member 300 and the battery cell 200 will be smaller, increasing the pressure exerted by the support member 300 on the battery cell 200. This will increase the risk of lithium plating due to stress concentration in the battery cell 200 and will also affect the support effect on the battery cell 200, thus impacting the voltage equalization effect.

[0084] For example, the relationship between e and b can be: e = 10%b, e = 12%b, e = 15%b, e = 18%b, e = 20%b, e = 22%b, e = 25%b, etc. This embodiment does not limit this.

[0085] In some alternative embodiments, please continue to refer to Figure 3The maximum dimension of the orthographic projection area S of the support member 300 on the first wall 110 in the second direction Y is h1, and the dimension of the shell 100 in the second direction Y is h2. h1 and h2 satisfy the relationship: 50%h2≤h1≤h2. The second direction Y is the height direction of the shell 100, meaning that the height of the support member 300 occupies 50%-100% of the height of the shell 100. This arrangement allows the support member 300 to better support the portion of the battery cell 200 with a smaller expansion amplitude in the height direction of the shell 100. This ensures that more than half of the portion of the battery cell 200 with a smaller expansion amplitude in the height direction of the shell 100 can be supported by the support member 300, thereby improving the support effect of the battery cell 200. It also reduces the risk of lithium plating caused by concentrated pressure from the support member 300 in the area of ​​the battery cell 200 with a smaller expansion amplitude, and improves the uniformity of the force on the battery cell 200.

[0086] It should be noted that the maximum size of the orthogonal projection area S of the support member 300 on the first wall 110 in the second direction Y cannot be too small. If it is too small, it will cause uneven stress on the cell 200 in the height direction of the housing 100, resulting in poor support effect of the support member 300 on the cell 200, and the cell 200 will still have the risk of lithium plating. Of course, it is understandable that the support member 300 cannot exceed the top of the housing 100, otherwise it will affect the connection between the housing 100 and the cover plate.

[0087] For example, the relationship between h1 and h2 is: h1 = 50%h2, h1 = 60%h2, h1 = 70%h2, h1 = 80%h2, h1 = 90%h2, h1 = 100%h2. This embodiment does not limit this.

[0088] Optionally, such as Figure 3 As shown, the minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111 is L, and the dimension of the housing 100 in the first direction X is b. L and b satisfy the relationship: L = (3% - 49%)b. The minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111 is the minimum distance from any point on the orthographic projection area S of the support member 300 on the first wall 110 to the center line 111 along the first direction X. A larger value of L indicates that the support member 300 is farther from the center line 111, and a smaller value of L indicates that the support member 300 is closer to the center line 111. Since the support member 300 needs to contact the area of ​​the battery cell 200 with a smaller expansion amplitude, and this area is some distance from the center area of ​​the battery cell 200, the value of L cannot be too small. However, the support member 300 cannot extend beyond the housing 100 in the first direction X, therefore, the value of L cannot be too large either.

[0089] In some optional embodiments, L = (25%-40%)b. When the value of L is within this range, the distance between the support member 300 and the center line 111 will not be too large or too small, and the support member 300 can contact the area of ​​the cell 200 with a small expansion amplitude, thereby supporting the cell 200. The support member 300 will not contact the area of ​​the cell 200 with a large expansion amplitude, reducing the risk of lithium plating in the cell 200 due to uneven stress, extending the service life of the cell 200, and improving the reliability of the cell 200 and the battery cell.

[0090] For example, the relationship between L and b is: L = 3%b, L = 5%b, L = 10%b, L = 15%b, L = 25%b, L = 28%b, L = 30%b, L = 35%b, L = 40%b, L = 45%b, L = 49%b, etc.

[0091] Optionally, in one embodiment, such as Figure 3 As shown, the minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the second wall 120 is d, and the dimension of the shell 100 in the first direction X is b. d and b satisfy the relationship: d = (8% - 12%)b. The minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the second wall 120 is the minimum value among the distances from any point on the orthographic projection area S of the support member 300 on the first wall 110 to the plane containing the second wall 120 along the first direction X. By controlling the relationship between the distance between the support member 300 and the second wall 120 and the length of the shell 100, the support member 300 will not be too close to the second wall 120, and the distance between them will not be too large. If the support member 300 is too close to the second wall 120, the improvement in the support effect on the cell 200 will be limited, and the support member 300 will also be wider and heavier, which is not conducive to the lightweighting of the battery cell. If the support member 300 is too far from the second wall 120, the edge area of ​​the cell 200 near the second wall 120 will not be supported, which will lead to lithium plating due to excessive stress, resulting in lower safety of the battery cell.

[0092] For example, the relationship between d and b can be: d = 8%b, d = 9%b, d = 10%b, d = 11%b, d = 12%b, etc.

[0093] In some other optional embodiments, the minimum distance d between the orthographic projection area S of the support member 300 on the first wall 110 and the second wall 120 ranges from 5mm to 20mm. For example, the minimum distance d between the orthographic projection area S of the support member 300 on the first wall 110 and the second wall 120 can be 5mm, 10mm, 15mm, 18mm, 20mm, etc.

[0094] In some alternative embodiments, please continue to refer to Figure 3 The minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the edge of the top of the housing 100 is h3, and the dimension of the housing 100 in the second direction Y is h2. h3 and h2 satisfy the relationship: h3 = (20% - 60%)h2. The minimum distance between the orthographic projection area S of the support member 300 on the first wall 110 and the edge of the top of the housing 100 is the minimum value among the distances from any point on the orthographic projection area S of the support member 300 on the first wall 110 to the top of the housing 100 along the second direction Y. When h3 and h2 satisfy this relationship, the distance between the support member 300 and the top of the housing 100 is more suitable, which can better support the battery cell 200 without affecting the electrical connection between the battery cell 200 and the cover assembly of the battery cell, and without affecting the assembly of the housing 100 and the cover assembly.

[0095] Optionally, the minimum distance h3 between the orthographic projection area S of the support member 300 on the first wall 110 and the edge of the top of the housing 100 ranges from 8mm to 150mm. For example, the values ​​of the minimum distance h3 between the orthographic projection area S of the support member 300 on the first wall 110 and the edge of the top of the housing 100 are 8mm, 10mm, 20mm, 30mm, 50mm, 60mm, 80mm, 100mm, 120mm, and 150mm.

[0096] In some alternative embodiments, such as Figure 2 As shown, the battery cell 200 has a bent portion 210 and a straight portion 220, wherein the bent portion 210 and the straight portion 220 are arranged in a first direction X, and the bent portion 210 is the end of the battery cell 200 in the first direction X. Figure 4 As shown, along the third direction Z, on a hypothetical plane perpendicular to the third direction Z, the orthographic projection of the support member 300 partially coincides with the orthographic projection of the bent portion 210. This arrangement allows the support member 300 to contact the bent portion 210 of the cell 200, thereby supporting the bent portion 210 and preventing uneven stress on it, thus reducing the risk of electrode material falling off the bent portion 210. It should be noted that the hypothetical plane perpendicular to the third direction Z is not a real plane, but an imaginary plane designed to facilitate describing the relative positional relationship between the support member 300 and the bent portion 210; the normal direction of this plane is the third direction Z.

[0097] It should be noted that the curved part 210 can be arc-shaped. In this case, the curved part 210 can also be called the R-corner region of the battery cell 200. The radius of the R-corner region is r. The minimum distance between the orthographic projection region S of the support member 300 on the first wall 110 and the second wall 120 is d, 0 < d < r, so as to ensure that the support member 300 will abut against part of the R-corner region.

[0098] Optionally, the support member 300 may be disposed on the housing 100; or, the support member 300 may also be disposed on the battery cell 200, which is not limited in this embodiment.

[0099] In one embodiment, the support member 300 is disposed on the housing 100, and the support member 300 and the first wall 110 of the housing 100 are separate structures. Understandably, the separate structure can be, for example... Figure 2 As shown, the support member 300 is connected to the first wall 110. The connection method can be bonding, welding, or other methods. This arrangement allows the support member 300 to be flexibly connected to the first wall 110 according to the position where the battery cell 200 needs support. When the support member 300 is connected to the housing 100, the connection between the support member 300 and the housing 100 uses an arc transition to reduce stress. Alternatively, in a split structure, the support member 300 and the first wall 110 can be unconnected. For example, the support member 300 can be connected to the insulating film covering the battery cell body without being connected to the first wall 110.

[0100] In other embodiments, the support member 300 is disposed on the housing 100, and the support member 300 and the first wall 110 are integrally formed as a single structure. This arrangement improves the overall integrity of the support member 300 and the housing 100, reduces the risk of separation between the support member 300 and the housing 100, and thus allows the support member 300 to better support areas of the battery cell 200 with smaller expansion amplitudes.

[0101] In one possible implementation, the battery cell 200 includes a battery cell body (not shown) and an insulating film (not shown) covering the battery cell body. A support member 300 may be disposed on the insulating film. The insulating film serves to prevent short circuits between the battery cell body and the housing 100.

[0102] In one embodiment, the support member 300 and the insulating film are independent of each other, and the support member 300 is connected to the insulating film. This facilitates the design of the position of the support member 300 relative to the insulating film, making the position of the support member 300 on the insulating film more flexible.

[0103] In other embodiments, the support 300 and the insulating film are integrally formed, that is, the material of the support 300 and the insulating film are the same, which improves the integrity of the support 300 and the insulating film; and the number of parts can be reduced, which facilitates the assembly of battery cells and improves assembly efficiency.

[0104] If the surface of the support member 300 facing the cell 200 has sharp corners, it will increase the risk of damaging the cell 200. In one possible implementation, such as Figure 2As shown, the surface of the support member 300 facing the battery cell 200 is curved. This design ensures that the surface of the support member 300 in contact with the battery cell 200 is curved, without sharp corners, thereby avoiding the risk of puncturing or scratching the battery cell 200 and reducing the impact of the support member 300 design on the service life of the battery cell 200.

[0105] Optionally, based on the fact that the surface of the support member 300 facing the cell 200 is curved, the shape of the support member 300 can have various forms, for example, in Figure 2 In the middle, the support member 300 can be hemispherical; for example, such as Figure 5 and Figure 15 As shown, the support member 300 is elongated. The specific shape of the support member 300 can be selected according to requirements, and this embodiment does not limit it.

[0106] It is understandable that the surface of the support member 300 facing the cell 200 can also be a flat surface, an inclined surface, or a wavy surface, etc., and this embodiment does not limit this. For example, Figure 8 As shown, the surface of the support member 300 facing the cell 200 is planar. For example, as... Figure 9 As shown, the surface of the support member 300 facing the cell 200 is inclined.

[0107] It is understandable that the surface of the support 300 facing the cell 200 can also be composed of at least two combinations of a flat surface, an inclined surface, a curved surface, and a wavy surface. For example, as Figure 8 As shown, the surface of the support member 300 facing the cell 200 consists of two arc surfaces and a plane (for example, a plane cut on a semi-cylindrical structure). The plane can increase the contact area between the support member 300 and the cell 200 to ensure the uniformity of force on the cell 200. The arc surfaces can reduce the risk of the support member 300 damaging the cell 200 and improve reliability.

[0108] Optionally, in one embodiment, such as Figures 5 to 8 As shown, the support member 300 has a strip-shaped structure, and the strip-shaped support member 300 can extend along the second direction Y. In other embodiments, such as Figure 9 As shown, the support member 300 is a plate-shaped structure. The length direction of the support member 300 can be the second direction Y, the width direction of the support member 300 can be the first direction X, and the thickness direction of the support member 300 can be the third direction Z.

[0109] Since the expansion amplitude of the battery cell 200 varies in the first direction X—for example, the expansion amplitude of the battery cell 200 is greater closer to its center in the first direction X—the support member 300 can be configured with a structure of varying thickness to accommodate the variation in the expansion amplitude of the battery cell 200. In some optional embodiments, such as... Figures 9 to 11As shown, along the direction from the centerline 111 to the support member 300, at least a portion of the support member 300 gradually increases in size in the third direction Z (i.e., the wall thickness direction of the first wall 110). For example: along the direction from the centerline 111 to the support member 300, the size of the support member 300 in the third direction Z gradually increases; or, the size of the support member 300 in the third direction Z remains constant initially and then gradually increases; or, the size of the support member 300 in the third direction Z gradually increases initially and then remains constant; or, the size of the support member 300 in the third direction Z gradually increases initially and then gradually decreases; including but not limited to the cases listed above.

[0110] With this configuration, the thickness of the portion of the support 300 away from the center line 111 is greater than the thickness of the portion closer to the center line 111. This allows the changes in the support 300 to match the expansion amplitude of the battery cell 200. Consequently, the pressure on the areas of the battery cell 200 with larger and smaller expansion amplitudes is approximately the same, further reducing the risk of stress concentration in the battery cell 200. This, in turn, reduces the risk of lithium plating and improves the reliability of the battery cell under high power output and high impact environments, thereby enhancing the safety of the battery cell.

[0111] Optionally, the shell 100 is typically rectangular, in which case, such as Figure 2 As shown, there are two first walls 110, which are arranged opposite each other in the third direction Z, and, as... Figure 5 As shown, the distance between the two opposing surfaces of the two first walls 110 is n. It should be noted that n is related to the thickness of the shell 100 and the wall thickness of the shell 100.

[0112] In this embodiment, the maximum dimension of the support member 300 in the third direction Z is x1, and satisfies: x1 ≤ 5%n. When x1 is within this range, the support member 300 can better support the battery cell 200, making the force on each area of ​​the battery cell 200 more uniform and reducing the risk of lithium plating. Of course, it is understood that x1 is not 0.

[0113] For example, the relationship between x1 and n can be: x1 = 1%n, x1 = 2%n, x1 = 3%n, x1 = 4%n, x1 = 5%n.

[0114] For example, the minimum dimension of the support member 300 in the third direction Z is x2, and satisfies: 0 < x2 ≤ 2.5%n. When x2 is within this range, the support effect of the support member 300 on the battery cell 200 can be improved, reducing the risk that the battery cell 200 may not be able to contact the support member 300 after expansion, so as to ensure that the force on each area of ​​the battery cell 200 is more uniform and to prevent stress concentration in the battery cell 200.

[0115] For example, the relationship between x2 and n can be: x2 = 1%n, x2 = 1.2%n, x2 = 1.5%n, x2 = 2%n, x2 = 2.5%n.

[0116] In some alternative embodiments, such as Figure 2 As shown, a support member 300 is provided on one side of the centerline 111 in the first direction X. In other alternative embodiments, such as Figures 6 to 16 As shown, the center line 111 is provided with support members 300 on both sides in the first direction X, so as to support the two areas of the cell 200 with small expansion amplitude in the first direction X, thereby improving the uniformity of force on the entire cell 200.

[0117] In one embodiment, such as Figure 5 As shown, a support member 300 is provided on one side of the cell 200 in the thickness direction (i.e., the third direction Z). In other embodiments, such as Figure 11 or Figure 14 As shown, support members 300 are provided on both sides of the thickness direction of the battery cell 200 to support both sides of the thickness direction of the battery cell 200, further improving the support effect of the entire battery cell 200, so that both sides of the thickness direction of the battery cell 200 can be subjected to uniform force, reducing the risk of lithium plating.

[0118] In some alternative embodiments, such as Figures 6 to 11 As shown, each support member 300 can be a single integral structure.

[0119] In some other alternative embodiments, such as Figure 2 , Figures 12 to 16 As shown, the support member 300 is composed of multiple structures. For example, the support member 300 includes at least two sub-support members 310. By configuring the support member 300 to include at least two sub-support members 310, the material used in the support member 300 can be reduced while ensuring effective support for the battery cell 200, thereby reducing the weight of the support member 300 and minimizing the increase in the weight of the battery cell due to the support member 300.

[0120] When the support member 300 includes at least two sub-support members 310, such as Figures 12 to 14 As shown, at least two sub-support members 310 can be spaced apart along the first direction X; or, as... Figure 15 and Figure 16 As shown, at least two sub-support members 310 can also be arranged at intervals along the second direction Y, but this embodiment does not limit this.

[0121] When at least two sub-support members 310 are spaced apart along the first direction X, such as Figure 13As shown, the dimension of the sub-support 310 in the second direction Y is p, and the distance between two adjacent sub-supports 310 in the first direction X is q. Here, q and p satisfy the relationship: 10%p ≤ q ≤ 50%p. It should be noted that when the value of q satisfies this relationship, it can better support the battery cell 200, improve the support effect and uniformity of the battery cell 200, thereby reducing the probability of lithium plating in the battery cell 200. Furthermore, by limiting the relationship between the distance between the two sub-supports 310 in the first direction X and the length of the sub-support 310 in the second direction Y, the distance between two adjacent sub-supports 310 can be appropriately increased when the dimension of the sub-support 310 in the second direction Y is larger; conversely, the distance between two adjacent sub-supports 310 needs to be designed to be smaller when the dimension of the sub-support 310 in the second direction Y is smaller. This ensures a larger contact area between the support 300 and the battery cell 200, resulting in a more uniform stress distribution on the battery cell 200.

[0122] To further ensure the contact area between the support member 300 and the battery cell 200, the number of sub-support members 310 can be limited. For example, if the dimension of the support member 300 in the first direction X is e, then the formula for calculating the number t1 of sub-support members 310 included in each support member 300 is: t1 = e / (p + q). Here, t1 is the integer part of the calculation result. This ensures that the number of sub-support members 310 meets the requirements, thereby guaranteeing the overall contact area between the support member 300 and the battery cell 200.

[0123] Optionally, the dimension p of the sub-support member 310 in the second direction Y ranges from 5mm to 100mm. For example, the dimension p of the sub-support member 310 in the second direction Y is 5mm, 15mm, 30mm, 45mm, 50mm, 80mm, or 100mm.

[0124] In one possible implementation, such as Figure 15 and Figure 16As shown, when at least two sub-support members 310 are spaced apart along the second direction Y, the dimension of the sub-support member 310 in the first direction X is z, and the distance between two adjacent sub-support members 310 in the second direction Y is y. Here, y and z satisfy the relationship: 50% z ≤ y ≤ z. It should be noted that when the value of y satisfies this relationship, it can better support the battery cell 200, improve the support effect and uniformity of the battery cell 200, thereby reducing the probability of lithium plating in the battery cell 200. Furthermore, by limiting the relationship between the distance between the two sub-support members 310 in the second direction Y and the length of the sub-support member 310 in the first direction X, the distance between two adjacent sub-support members 310 can be appropriately increased when the size of the sub-support member 310 in the first direction X is larger; the distance between two adjacent sub-support members 310 needs to be designed to be smaller when the size of the sub-support member 310 in the first direction X is smaller. In this way, the contact area between the entire support member 300 and the battery cell 200 can be guaranteed, so that the contact area between the support member 300 and the battery cell 200 can be larger, thereby making the battery cell 200 more uniformly stressed.

[0125] To further ensure the contact area between the support member 300 and the battery cell 200, the number of sub-support members 310 can be limited. For example, if the dimension of the support member 300 in the second direction Y is h1, then the formula for calculating the number t2 of sub-support members 310 included in each support member 300 is: t2 = e / (y+z). Here, t2 is the integer part of the calculation result. This ensures that the number of sub-support members 310 meets the requirements, thereby guaranteeing the overall contact area between the support member 300 and the battery cell 200.

[0126] Optionally, the dimension z of the sub-support member 310 in the first direction X ranges from 5mm to 100mm. For example, the dimensions of the sub-support member 310 in the first direction X are 5mm, 15mm, 30mm, 45mm, 50mm, 80mm, and 100mm.

[0127] It should be noted that when the support member 300 includes multiple sub-support members 310, it can still satisfy the requirement that the size of the support member 300 gradually increases in the third direction Z along the direction pointing from the centerline 111 to the support member 300. For example, when multiple sub-support members 310 are spaced apart in the first direction X, such as... Figure 12 or Figure 14 As shown, along the center line 111 pointing towards the support member 300, the dimensions of multiple sub-support members 310 gradually increase in the third direction Z, and each sub-support member 310 can be a structure of uniform thickness. In this way, the uniformity of support for the battery cell 200 can be improved.

[0128] The battery cell provided in this embodiment, by optimizing the mechanical structure of the casing 100 and setting a support member 300 between the first wall 110 and the cell 200, can effectively ensure that the battery cell can uniformly bear the expansion force of the cell 200 during charging and discharging, making the internal pressure distribution of the battery more uniform, thereby reducing internal stress concentration, reducing the risk of lithium plating, and improving the reliability of the battery under high power output and high impact environments. It is suitable for various battery types, especially for use in high energy density batteries and high power batteries, and has high safety and long service life. The support member 300 may include multiple sub-support members 310, and the thickness of the support member 300 is variable, which can reduce local pressure concentration on the cell 200. Multiple sub-support members 310 can effectively disperse the pressure generated when the cell 200 expands, making the pressure distribution more uniform. The support member 300 provided in this embodiment has a simple structure, which is convenient for manufacturing and assembly.

[0129] Example 2

[0130] This embodiment provides a housing 100 that can support areas of the battery cell 200 with small expansion range, thereby reducing the risk of lithium plating in the battery cell 200, and has rich functionality.

[0131] For example, the housing 100 in this embodiment includes a first wall 110 and a second wall 120 connected to each other. The area of ​​the first wall 110 is larger than the area of ​​the second wall 120. The first wall 110 has a center line 111 extending along a second direction Y, where the second direction Y is the height direction of the first wall 110. In this embodiment, the support member 300 is connected to the first wall 110, and there is a gap between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111.

[0132] By providing a support member 300 on the first wall 110, and having a gap between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111 of the first wall 110, the support member 300 can contact and support the area of ​​the battery cell 200 with a small expansion amplitude, making the battery cell 200 more uniformly stressed, avoiding stress concentration problems, and thus reducing the risk of lithium plating.

[0133] The specific structure of the support member 300 and the shell 100 in this embodiment can be the same as or similar to the specific structure of the support member 300 in Embodiment 1. This embodiment will not repeat the details here.

[0134] Example 3

[0135] This embodiment provides a housing 100 that can support areas of the battery cell 200 with small expansion range, thereby reducing the risk of lithium plating in the battery cell 200, and has rich functionality.

[0136] For example, the housing 100 in this embodiment includes a first wall 110 and a second wall 120 connected to each other. The area of ​​the first wall 110 is larger than the area of ​​the second wall 120. The first wall 110 has a centerline 111 extending along a second direction Y, where the second direction Y is the height direction of the first wall 110.

[0137] The surface of the housing 100 near the battery cell 200 protrudes in the direction toward the battery cell 200, while the surface away from the battery cell is correspondingly recessed, forming the support member 300 in this embodiment. There is a gap between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111.

[0138] The support member 300 is formed by stamping on the first wall 110 of the housing 100. In this way, the housing 100 itself has the function of protecting the battery cell 200 and supporting the area where the expansion range of the battery cell 200 is small, making the housing 100 more functional. Furthermore, there is no need to add material for forming the support member 300, so that the weight of the battery cell can be reduced, which is conducive to the miniaturization of the battery cell.

[0139] By providing a support member 300 on the first wall 110, and having a gap between the orthographic projection area S of the support member 300 on the first wall 110 and the center line 111 of the first wall 110, the support member 300 can contact and support the area of ​​the battery cell 200 with a small expansion amplitude, making the battery cell 200 more uniformly stressed, avoiding stress concentration problems, and thus reducing the risk of lithium plating.

[0140] Other technical details of the support member 300 and the housing 100 in this embodiment can be found in the content of Embodiment 1, and will not be repeated here.

[0141] Example 4

[0142] This embodiment provides a battery that can reduce the risk of lithium plating and has high reliability and safety.

[0143] The battery includes the single battery cell as described in Embodiment 1; or, the battery includes the casing 100 as described in Embodiment 2. The battery in this embodiment can be an electrode battery, a cylindrical battery, a wound battery, etc., and this embodiment does not limit the type of battery.

[0144] Example 5

[0145] This embodiment also provides an electrical device with high reliability and safety.

[0146] The electrical device includes the battery cell in Embodiment 1; or, the electrical device includes the housing 100 in Embodiment 2; or, the electrical device includes the battery in Embodiment 3.

[0147] For example, electrical devices include, but are not limited to: mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0148] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery cell, characterized by include: The housing (100) includes a first wall (110) and a second wall (120) connected to each other, the area of ​​the first wall (110) being larger than the area of ​​the second wall (120), and the first wall (110) having a centerline (111) extending along a second direction (Y), the second direction (Y) being the height direction of the first wall (110); The battery cell (200) is disposed within the housing (100); A support member (300) is disposed between the first wall (110) and the battery cell (200), and there is a gap between the orthographic projection area (S) of the support member (300) on the first wall (110) and the center line (111).

2. The battery cell of claim 1, wherein, The surface of the support member (300) facing the battery cell (200) is an arc surface; And / or, the support member (300) is a plate-like structure.

3. The battery cell according to claim 1, characterized in that: Along the center line (111) pointing towards the support member (300), at least a portion of the support member (300) gradually increases in size in a third direction (Z), wherein the third direction (Z) is the thickness direction of the first wall (110).

4. The battery cell according to claim 3, characterized in that: There are two first walls (110), which are arranged opposite to each other in the third direction (Z), and the distance between the two opposite surfaces of the two first walls (110) is n; The maximum value of the dimension of the support member (300) in the third direction (Z) is x1, and satisfies: x1≤5%n; the minimum value of the dimension of the support member (300) in the third direction (Z) is x2, and satisfies: 0<x2≤2.5%n.

5. The battery cell according to claim 1, characterized in that: The maximum dimension of the orthographic projection area (S) of the support member (300) on the first wall (110) in the first direction (X) is e, and the dimension of the shell (100) in the first direction (X) is b, wherein e and b satisfy the relationship: 10%b≤e≤25%b; wherein the first direction (X) is the length direction of the first wall (110); And / or, The maximum dimension of the orthographic projection area (S) of the support member (300) on the first wall (110) in the second direction (Y) is h1, and the dimension of the shell (100) in the second direction (Y) is h2, wherein h1 and h2 satisfy the relationship: 50%h2≤h1≤h2; And / or, The minimum distance between the orthographic projection area (S) of the support member (300) on the first wall (110) and the center line (111) is L, and the dimension of the shell (100) in the first direction (X) is b, wherein L and b satisfy the relationship: L = (3% - 49%)b.

6. The battery cell according to claim 1, characterized in that: The minimum distance between the orthographic projection area (S) of the support member (300) on the first wall (110) and the second wall (120) is d, and the dimension of the shell (100) in the first direction (X) is b. d and b satisfy the relationship: d = (8% - 12%)b; and / or, the value range of d is 5mm-20mm. And / or, The minimum distance between the orthographic projection area (S) of the support member (300) on the first wall (110) and the edge of the top of the shell (100) is h3, and the dimension of the shell (100) in the second direction (Y) is h2. h3 and h2 satisfy the relationship: h3 = (20% - 60%)h2; and / or, the value of h3 is in the range of 8mm-150mm.

7. The battery cell of claim 1, wherein: The support member (300) includes at least two sub-support members (310); the at least two sub-support members (310) are spaced apart along a first direction (X); or, the at least two sub-support members (310) are spaced apart along a second direction (Y); wherein, the first direction (X) is the length direction of the first wall (110).

8. The battery cell according to claim 7, characterized in that: At least two of the sub-support members (310) are spaced apart along the first direction (X), the dimension of the sub-support member (310) in the second direction (Y) is p, the distance between two adjacent sub-support members (310) in the first direction (X) is q, and q and p satisfy the relationship: 10%p≤q≤50%p; and / or, the value of p is in the range of 5mm-100mm; or, At least two of the sub-support members (310) are spaced apart along the second direction (Y); the dimension of the sub-support member (310) in the first direction (X) is z, and the distance between two adjacent sub-support members (310) in the second direction (Y) is y, and y and z satisfy the relationship: 50% z≤y≤z; and / or, the value of z is in the range of 5mm-100mm.

9. The battery cell of claim 1, wherein, The battery cell (200) has a curved portion (210) and a straight portion (220). Along a third direction (Z), on a dummy plane perpendicular to the third direction (Z), the orthographic projection of the support member (300) coincides with the orthographic projection of the curved portion (210); wherein the third direction (Z) is the thickness direction of the first wall (110).

10. The battery cell of any one of claims 1-9, wherein, The support member (300) is separately disposed from the first wall (110); or, the support member (300) and the first wall (110) are integrally formed into a single structure.

11. The battery cell of any one of claims 1-9, wherein, The battery cell (200) includes a battery cell body and an insulating film covering the battery cell body; The support member (300) is connected to the insulating film; or, the support member (300) and the insulating film are integrally formed into a single structure.

12. A housing characterized by, include: A first wall (110) and a second wall (120) are connected to each other. The area of ​​the first wall (110) is larger than the area of ​​the second wall (120). The first wall (110) has a centerline (111) extending along a second direction (Y), which is the height direction of the first wall (110). A support member (300) is connected to the first wall (110), and there is a gap between the orthographic projection area (S) of the support member (300) on the first wall (110) and the center line (111).

13. A housing characterized by, include: A first wall (110) and a second wall (120) are connected to each other. The area of ​​the first wall (110) is larger than the area of ​​the second wall (120). The first wall (110) has a centerline (111) extending along a second direction (Y), which is the height direction of the first wall (110). The side surface of the housing (100) near the battery cell (200) protrudes in the direction toward the battery cell (200), and the side surface away from the battery cell (200) is correspondingly recessed to form a support member (300); there is a gap between the orthographic projection area (S) of the support member (300) on the first wall (110) and the center line (111).

14. A battery characterized by It includes a battery cell as described in any one of claims 1-11; or, the battery includes a housing (100) as described in claim 12 or 13.

15. An electrical device, characterized by The device may include a battery cell as described in any one of claims 1-11; or, the device may include a housing (100) as described in claim 12 or 13; or, the device may include a battery as described in claim 14.

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