Battery and electric device

Abstract

A battery and an electric device. The battery comprises: a plate body (3), through holes being formed in the plate body in a penetrating manner; poles (5) at least partially passing through the through holes in the axial direction, each pole (5) being provided with an abutment portion (51) abutting against a first side of the plate body (3) and a penetrating portion (52) penetrating out of a second side of the plate body (3); mounting members (1) riveted to the penetrating portions (52); first insulating members (2) abutted between the mounting members (1) and the second side of the plate body (3); second insulating members (4) abutted between the abutment portions (51) and the first side of the plate body (3); and multi-layer seal rings (6) sleeved on the outer peripheries of the poles (5), each multi-layer seal ring (6) being arranged in a stepped and layer-staggered manner, and each layer of each multi-layer seal ring (6) abutting against the corresponding first insulating member (2), the plate body (3) and the corresponding second insulating member (4) respectively in the radial direction and compressing in the axial direction. The multi-layer seal rings (6) can improve the sealing performance and insulation performance between the poles (5) and the plate body (3), so that the battery can adapt to a larger energy density, thereby avoiding liquid leakage of the battery.

Description

Batteries and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 7, 2023, with application number 202311670348.7 and invention name “Batteries and Electrical Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of electrical equipment, and in particular to a battery and electrical equipment. Background Art

[0004] With the continuous development of the battery industry, the energy density of batteries continues to increase. In order to improve the overall safety performance of the battery, it is necessary to seal and insulate the poles and the plate body.

[0005] The battery cover is a crucial component for ensuring battery cell safety, and the sealing ring within it plays a crucial role in sealing and insulating the entire battery. Existing riveted battery covers achieve insulation between the terminal and the plate body by compressing the sealing ring. However, as energy density increases, the sealing effect of existing sealing rings becomes less than ideal, posing a risk of leakage. Summary of the Invention

[0006] In view of this, the present application provides a battery and an electrical device to solve the problem of loose sealing of the sealing ring and easy leakage.

[0007] In a first aspect, the present application provides a battery, comprising:

[0008] A plate body having a through hole formed therethrough;

[0009] A pole at least partially passes through the through hole in the axial direction, the pole having an abutting portion abutting against the first side of the plate body and a passing portion passing through the second side of the plate body;

[0010] A mounting member is adapted to securely connect the protruding portion to the plate body; a first insulating member is disposed between the mounting member and the second side of the plate body;

[0011] a second insulating member disposed between the abutting portion and the first side of the plate body; and

[0012] The multi-layer sealing ring is sleeved on the outer peripheral side of the pole. The multi-layer sealing ring is arranged in a staggered manner in a stepped manner, and each layer of the multi-layer sealing ring is respectively pressed against the first insulating member, the plate body and the second insulating member in the radial direction and compressed in the axial direction.

[0013] Beneficial effect: The battery provided by the present application arranges a multi-layer sealing ring between the pole and the plate body. The multi-layer sealing ring is arranged in a staggered manner, and each layer of the multi-layer sealing ring is radially pressed against the first insulating part, the plate body and the second insulating part and compressed along the axial direction, so that the multi-layer sealing ring can be well sealed with the first insulating part, the plate body and the second insulating part at the same time, so as to increase the sealing and insulation performance of the multi-layer sealing ring between the pole and the plate body, and can adapt to a larger energy density and avoid leakage.

[0014] In an optional embodiment, the multi-layer sealing ring includes three layers of sealing rings, and the three layers of sealing rings are arranged in three steps along the axial direction.

[0015] Beneficial effect: By adopting three-layer sealing rings, the three-layer sealing rings can be well sealed with the first insulating member, the plate body and the second insulating member at the same time, ensuring that each position has a good sealing effect, so that the three positions cooperate to reduce leakage points.

[0016] In an optional embodiment, the first overlap amount between the first sealing layer of the multi-layer sealing ring and the second insulating member is d, and d satisfies: d=A / 2-a / 2, the first overlap rate between the first sealing layer of the multi-layer sealing ring and the first layer of the second insulating member is ds, and ds satisfies: ds=d / (A / 2-B / 2), wherein A is the pore size of the first sealing layer of the multi-layer sealing ring, a is the pore size of the second insulating member, and B is the pore size of the second sealing layer of the multi-layer sealing ring; wherein the first overlap amount refers to the size of the overlapping area between the first sealing layer of the multi-layer sealing ring and the second insulating member along the axial direction, and the first layer overlap rate refers to the proportion of the first overlap amount to the size of the first sealing layer of the multi-layer sealing ring along the axial direction;

[0017] And / or, the second overlap amount between the second sealing layer of the multi-layer sealing ring and the plate body is e, and e satisfies: e=B / 2-b / 2, the overlap rate between the second sealing layer of the multi-layer sealing ring and the second layer of the plate body is es, and es satisfies: es=e / (B / 2-C / 2), wherein B is the aperture of the second sealing layer of the multi-layer sealing ring, b is the aperture of the through hole of the plate body, and C is the aperture of the third sealing layer of the multi-layer sealing ring; wherein, the second overlap amount refers to the size of the overlapping area of ​​the second sealing layer of the multi-layer sealing ring and the plate body along the axial direction, and the second layer overlap rate refers to the proportion of the second overlap amount to the size of the second sealing layer of the multi-layer sealing ring along the axial direction;

[0018] And / or, the third overlap amount between the third sealing layer of the multi-layer sealing ring and the first insulating part is f, and f satisfies: f = C / 2-c / 2, the third overlap rate between the third sealing layer of the multi-layer sealing ring and the first insulating part is fs, and fs satisfies: fs = f / (C / 2-D / 2), wherein C is the aperture of the third sealing layer of the multi-layer sealing ring, c is the aperture of the first insulating part, and D is the diameter of the pole; wherein, the third overlap amount refers to the size of the overlapping area of ​​the third sealing layer of the multi-layer sealing ring along the axial direction with the first insulating part, and the third layer overlap rate refers to the proportion of the third overlap amount in the size of the third sealing layer of the multi-layer sealing ring along the axial direction.

[0019] Beneficial effect: By limiting the overlap between each sealing layer of the multi-layer sealing ring and the first insulating member, the plate body and the second insulating member, it can be ensured that each layer can achieve radial sealing and ensure the sealing effect.

[0020] In an optional embodiment, the overlap amount d between the first sealing layer of the multi-layer sealing ring and the second insulating member is in the range of 0.2 mm ≤ d ≤ 0.8 mm; the overlap rate ds between the first sealing layer of the multi-layer sealing ring and the first layer of the second insulating member is in the range of 20% ≤ ds ≤ 80%;

[0021] and / or, the overlap amount e between the second sealing layer of the multi-layer sealing ring and the plate body is in the range of 0.35 mm ≤ e ≤ 0.75 mm; the overlap rate es between the second sealing layer of the multi-layer sealing ring and the second layer of the plate body is in the range of 35% ≤ es ≤ 75%;

[0022] And / or, the overlap amount f between the third sealing layer of the multi-layer sealing ring and the first insulating member is in the range of 0.2mm≤f≤0.5mm; the overlap rate fs between the third sealing layer of the multi-layer sealing ring and the third layer of the first insulating member is in the range of 33.3%≤fs≤83.3%.

[0023] Beneficial Effects: The battery provided by this application, by limiting the lower limits of the overlap amounts d, e, and f, can prevent the sealing area of ​​the multi-layer sealing ring from being too small, thereby preventing the sealing and insulation performance of the sealing ring inside the battery from being affected. By limiting the upper limits of the overlap amounts d, e, and f, it can prevent the contact area of ​​the multi-layer sealing ring from being too large, avoiding an increase in the cost of the sealing ring and also avoiding an increase in the weight of the battery, thereby ensuring lightweighting.

[0024] In an optional embodiment, the compression amount of the first sealing layer of the multi-layer sealing ring is x, and x satisfies x=Mm, wherein M is the original height of the first sealing layer of the multi-layer sealing ring, and m is the distance between the bottom surface of the second insulating member in the axial direction and the bottom surface of the multi-layer sealing ring in the axial direction;

[0025] and / or, the compression amount of the second sealing layer of the multi-layer sealing ring is y, and y satisfies y=Nn, wherein N is the original height of the second sealing layer of the multi-layer sealing ring, and n is the distance between the bottom surface of the plate body in the axial direction and the bottom surface of the multi-layer sealing ring in the axial direction;

[0026] And / or, the compression amount of the third sealing layer of the multi-layer sealing ring is z, and z satisfies z=Oo, where O is the original height of the third sealing layer of the multi-layer sealing ring, and o is the distance between the bottom surface of the first insulating part along the axial direction and the bottom surface of the multi-layer sealing ring along the axial direction.

[0027] Beneficial Effects: Because the multi-layer sealing ring is made of a soft material, it has a certain amount of compression after installation, which can ensure the sealing effect. At the same time, each layer of the multi-layer sealing ring has a certain amount of compression, which can effectively ensure that each layer is well compressed and the sealing effect of each layer is guaranteed, thereby ensuring the overall sealing and insulation performance, and can adapt to higher energy density and prevent leakage.

[0028] In an optional embodiment, the compression amount x of the first sealing layer of the multi-layer sealing ring is in the range of: 0.15 mm ≤ x ≤ 0.3 mm;

[0029] And / or, the compression amount y of the second sealing layer of the multi-layer sealing ring is in the range of: 0.35 mm ≤ y ≤ 0.7 mm;

[0030] And / or, the compression amount z of the third sealing layer of the multi-layer sealing ring is in the range of 0.15 mm ≤ z ≤ 0.3 mm.

[0031] In an optional embodiment, the compressibility of the first sealing layer of the multi-layer sealing ring is X1, and X1 satisfies X1=x / M;

[0032] And / or, the compressibility of the second sealing layer of the multi-layer sealing ring is X2, and X2 satisfies X2=y / N;

[0033] And / or, the compressibility of the third sealing layer of the multi-layer sealing ring is X3, and X3 satisfies X3=z / O.

[0034] In an optional embodiment, the compression rate X1 of the first sealing layer of the multi-layer sealing ring ranges from 30% to 60%;

[0035] And / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring is in the range of 30%-65%;

[0036] And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring is in the range of 6%-12%.

[0037] Beneficial effects: By limiting the lower limit of the compression rate of each layer of the multi-layer sealing ring, it is possible to avoid the compression rate being too small affecting the radial compression amount and compression rate of the three-layer sealing ring, thereby affecting the sealing performance and insulation performance of the sealing ring inside the battery top cover; in addition, by limiting the upper limit of the compression rate of each layer of the multi-layer sealing ring, it is possible to avoid the increase in the cost of the multi-layer sealing ring due to the high compression rate, avoid increasing the weight of the battery, and meet the lightweight requirements.

[0038] In an optional embodiment, the compression rate X1 of the first sealing layer of the multi-layer sealing ring is 40%;

[0039] and / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring is 40%;

[0040] And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring is 10%.

[0041] In a second aspect, the present application also provides an electrical device, including: a battery as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0043] FIG1 is a schematic diagram of a battery of the present application;

[0044] FIG2 is a partial cross-sectional schematic diagram of the battery of the present application;

[0045] FIG3 is a second partial cross-sectional schematic diagram of the battery of the present application;

[0046] FIG4 is a third partial cross-sectional schematic diagram of the battery of the present application.

[0047] Description of reference numerals:

[0048] 1. Mounting member; 2. First insulating member; 3. Plate body; 4. Second insulating member; 5. Pole; 51. Abutment portion; 52. Penetration portion; 6. Multi-layer sealing ring. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0050] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0053] The following describes an embodiment of the present application in conjunction with FIG. 1 to FIG. 4 .

[0054] According to an embodiment of the present application, on one hand, a battery is provided, comprising:

[0055] The plate body 3 has a through hole formed therethrough;

[0056] The pole 5 at least partially passes through the through hole in the axial direction, and the pole 5 has an abutting portion 51 abutting against the first side of the plate body 3, and a passing portion 52 passing through the second side of the plate body 3;

[0057] The mounting member 1 is adapted to securely connect the protruding portion 52 to the plate body 3; the first insulating member 2 is disposed between the mounting member 1 and the second side of the plate body 3;

[0058] The second insulating member 4 is disposed between the abutting portion 51 and the first side of the plate body 3; and

[0059] The multi-layer sealing ring 6 is sleeved on the outer peripheral side of the pole 5. The multi-layer sealing ring 6 is arranged in a staggered manner, and each layer of the multi-layer sealing ring 6 is radially pressed against the first insulating member 2, the plate body 3 and the second insulating member 4 and compressed in the axial direction.

[0060] The battery also includes a housing, which houses the electrode assembly. In one embodiment, the plate body 3 and the housing are integrally formed, with the plate body 3 formed by one of the housing's walls. In another embodiment, the plate body 3 and the housing are separate components. In this case, the housing has an opening, and the plate body 3 covers the opening. The plate body 3 and the housing are sealed together by the edges of the housing, so that the plate body 3 and the housing together form a cavity that houses the electrode assembly.

[0061] The battery provided in the embodiment of the present application is provided with a multi-layer sealing ring 6 between the pole 5 and the plate body 3. The multi-layer sealing ring 6 is arranged in a staggered manner in a stepped manner, and each layer of the multi-layer sealing ring 6 is radially pressed against the first insulating member 2, the plate body 3 and the second insulating member 4 and compressed along the axial direction, so that the multi-layer sealing ring 6 can be well sealed with the first insulating member 2, the plate body 3 and the second insulating member 4 at the same time, so as to increase the sealing and insulating performance of the multi-layer sealing ring 6 between the pole and the plate body, and can adapt to a higher energy density and avoid leakage.

[0062] Additionally, the battery of this embodiment uses riveting to achieve the connection between the pole and the plate body, while for batteries that achieve the connection between the pole and the plate body by non-riveting methods, the multi-layer sealing ring 6 is also applicable, such as threaded connection, snap connection, or adhesive connection.

[0063] In some embodiments, as shown in FIG. 2 , the multi-layer sealing ring 6 includes three layers of sealing rings, and the three layers of sealing rings are arranged in three steps along the axial direction.

[0064] By adopting three layers of sealing rings, the three layers of sealing rings can simultaneously perform good sealing with the first insulating member 2, the plate body 3 and the second insulating member 4, ensuring that each position has a good sealing effect, so that the three positions cooperate to reduce leakage points.

[0065] As shown in FIG2 , the three-layer sealing ring is arranged in a three-layer stepped shape along the axial direction, and the apertures of the three-layer steps decrease in sequence along the axial direction.

[0066] Additionally, the multi-layer sealing ring 6 may also be a sealing ring with four, five or more layers.

[0067] In some embodiments, as shown in FIG3 , the first overlap amount between the first sealing layer of the multi-layer sealing ring 6 and the second insulating member 4 is d, and d satisfies: d=A / 2-a / 2, the first overlap rate between the first sealing layer of the multi-layer sealing ring 6 and the first layer of the second insulating member 4 is ds, and ds satisfies: ds=d / (A / 2-B / 2), wherein A is the aperture of the first sealing layer of the multi-layer sealing ring 6, a is the aperture of the second insulating member 4, and B is the aperture of the second sealing layer of the multi-layer sealing ring 6; wherein the first overlap amount refers to the size of the overlapping area of ​​the first sealing layer of the multi-layer sealing ring 6 and the second insulating member 4 along the axial direction, and the first layer overlap rate refers to the proportion of the first overlap amount to the size of the first sealing layer of the multi-layer sealing ring 6 along the axial direction;

[0068] And / or, the second overlap amount of the second sealing layer of the multi-layer sealing ring 6 and the plate body 3 is e, and e satisfies: e=B / 2-b / 2, the overlap rate of the second sealing layer of the multi-layer sealing ring 6 and the second layer of the plate body 3 is es, and es satisfies: es=e / (B / 2-C / 2), wherein B is the aperture of the second sealing layer of the multi-layer sealing ring 6, b is the aperture of the through hole of the plate body 3, and C is the aperture of the third sealing layer of the multi-layer sealing ring 6; wherein, the second overlap amount refers to the size of the overlapping area of ​​the second sealing layer of the multi-layer sealing ring 6 and the plate body 3 along the axial direction, and the second layer overlap rate refers to the proportion of the second overlap amount to the size of the second sealing layer of the multi-layer sealing ring 6 along the axial direction;

[0069] And / or, the third overlap amount between the third sealing layer of the multi-layer sealing ring 6 and the first insulating part 2 is f, and f satisfies: f = C / 2-c / 2, the third overlap rate between the third sealing layer of the multi-layer sealing ring 6 and the first insulating part 2 is fs, and fs satisfies: fs = f / (C / 2-D / 2), wherein C is the aperture of the third sealing layer of the multi-layer sealing ring 6, c is the aperture of the first insulating part 2, and D is the diameter of the pole 5; wherein, the third overlap amount refers to the size of the overlapping area of ​​the third sealing layer of the multi-layer sealing ring 6 along the axial direction with the first insulating part 2, and the third layer overlap rate refers to the proportion of the third overlap amount in the axial size of the third sealing layer of the multi-layer sealing ring 6.

[0070] The overlap between the first sealing layer of the multi-layer sealing ring 6 and the second insulating member 4 is d, where d is specifically the difference between the radial diameter of the first sealing layer of the multi-layer sealing ring 6 and the diameter of the second insulating member 4. Similarly, the overlap e between the second sealing layer of the multi-layer sealing ring 6 and the plate body 3 is specifically the difference between the radial diameter of the second sealing layer of the multi-layer sealing ring 6 and the diameter of the through hole of the plate body 3. The overlap f between the third sealing layer of the multi-layer sealing ring 6 and the first insulating member 2 is specifically the difference between the radial diameter of the third sealing layer of the multi-layer sealing ring 6 and the diameter of the first insulating member 2.

[0071] By limiting the overlap between each sealing layer of the multi-layer sealing ring 6 and the first insulating member 2 , the plate body 3 and the second insulating member 4 , it is possible to ensure that each layer can achieve radial sealing and ensure the sealing effect.

[0072] By limiting the overlap rate of each sealing layer of the multi-layer sealing ring 6 with the first insulating member 2, the plate body 3 and the second insulating member 4, the sealing effect of the multi-layer sealing ring 6 can be ensured while avoiding damage caused by excessive squeezing of the multi-layer sealing ring 6.

[0073] In some embodiments, as shown in FIG3 , the overlap amount d between the first sealing layer of the multi-layer sealing ring 6 and the second insulating member 4 is in the range of 0.2 mm ≤ d ≤ 0.8 mm; the overlap rate ds between the first sealing layer of the multi-layer sealing ring 6 and the first layer of the second insulating member 4 is in the range of 20% ≤ ds ≤ 80%;

[0074] and / or, the overlap amount e between the second sealing layer of the multi-layer sealing ring 6 and the plate body 3 is in the range of 0.35 mm ≤ e ≤ 0.75 mm; the overlap ratio es between the second sealing layer of the multi-layer sealing ring 6 and the second layer of the plate body 3 is in the range of 35% ≤ es ≤ 75%;

[0075] And / or, the overlap amount f between the third sealing layer of the multi-layer sealing ring 6 and the first insulating part 2 is in the range of: 0.2mm≤f≤0.5mm; the overlap rate fs between the third sealing layer of the multi-layer sealing ring 6 and the third layer of the first insulating part 2 is in the range of: 33.3%≤fs≤83.3%.

[0076] Optionally, the overlap amount d between the first sealing layer of the multi-layer sealing ring 6 and the second insulating member 4 may be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, or 0.8 mm.

[0077] Optionally, the overlap amount e between the second sealing layer of the multi-layer sealing ring 6 and the plate body 3 may be 0.35 mm, 0.45 mm, 0.55 mm, 0.65 mm, or 0.75 mm.

[0078] Optionally, the overlap amount f between the third sealing layer of the multi-layer sealing ring 6 and the first insulating member 2 may be 0.2 mm, 0.3 mm, 0.4 mm, or 0.5 mm.

[0079] As an optional embodiment, the values ​​of the overlap amounts d, e, and f are 0.5 mm, 0.75 mm, and 0.45 mm, respectively.

[0080] The battery provided in the embodiments of the present application, by limiting the lower limits of the overlap amounts d, e, and f, can prevent the sealing area of ​​the multi-layer sealing ring 6 from being too small, thereby preventing the sealing and insulation performance of the sealing ring inside the battery from being affected. By limiting the upper limits of the overlap amounts d, e, and f, it can prevent the contact area of ​​the multi-layer sealing ring 6 from being too large, avoiding an increase in the cost of the sealing ring and also avoiding an increase in the weight of the battery, thereby ensuring lightweighting.

[0081] Among them, since the plate body is made of hard material, the value range of the overlap amount e is larger, and since the overlap requirement of the plate body for the sealing ring is obviously higher than the overlap requirement of the plastic for the sealing ring, the value range of the overlap amount e is larger than the value range of the overlap amounts d and f.

[0082] In some embodiments, as shown in FIG4 , the compression amount of the first sealing layer of the multi-layer sealing ring 6 is x, and x satisfies x=Mm, where M is the original height of the first sealing layer of the multi-layer sealing ring 6, and m is the distance between the bottom surface of the second insulating member 4 in the axial direction and the bottom surface of the multi-layer sealing ring 6 in the axial direction;

[0083] and / or, the compression amount of the second sealing layer of the multi-layer sealing ring 6 is y, and y satisfies y=Nn, wherein N is the original height of the second sealing layer of the multi-layer sealing ring 6, and n is the distance between the bottom surface of the plate body 3 in the axial direction and the bottom surface of the multi-layer sealing ring 6 in the axial direction;

[0084] And / or, the compression amount of the third sealing layer of the multi-layer sealing ring 6 is z, and z satisfies z=Oo, where O is the original height of the third sealing layer of the multi-layer sealing ring 6, and o is the distance between the bottom surface of the first insulating part 2 along the axial direction and the bottom surface of the multi-layer sealing ring 6 along the axial direction.

[0085] Because the multi-layer sealing ring 6 is made of a soft material, it has a certain amount of compression after installation, which can ensure the sealing effect. At the same time, each layer of the multi-layer sealing ring 6 has a certain amount of compression, which can effectively ensure that each layer is well compressed, ensuring the sealing effect of each layer, and thus ensuring the overall sealing and insulation performance, can adapt to higher energy density and prevent leakage.

[0086] The compression amount x of the first sealing layer of the multi-layer sealing ring 6 specifically refers to the difference between the original height of the first sealing layer of the multi-layer sealing ring 6 and the distance between the axial bottom surface of the second insulating part 4 and the axial bottom surface of the multi-layer sealing ring 6; the compression amount y of the second sealing layer of the multi-layer sealing ring 6 specifically refers to the difference between the original height of the second sealing layer of the multi-layer sealing ring 6 and the distance between the axial bottom surface of the plate body 3 and the axial bottom surface of the multi-layer sealing ring 6; the compression amount z of the third sealing layer of the multi-layer sealing ring 6 specifically refers to the difference between the original height of the third sealing layer of the multi-layer sealing ring 6 and the distance between the axial bottom surface of the first insulating part 2 and the axial bottom surface of the multi-layer sealing ring 6.

[0087] In some embodiments, as shown in FIG4 , the range of the compression amount x of the first sealing layer of the multi-layer sealing ring 6 is: 0.15 mm ≤ x ≤ 0.3 mm;

[0088] And / or, the compression amount y of the second sealing layer of the multi-layer sealing ring 6 is in the range of: 0.35 mm ≤ y ≤ 0.7 mm;

[0089] And / or, the compression amount z of the third sealing layer of the multi-layer sealing ring 6 is in the range of 0.15 mm ≤ z ≤ 0.3 mm.

[0090] Optionally, the compression amount x of the first sealing layer of the multi-layer sealing ring 6 may be 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0091] Optionally, the compression amount y of the second sealing layer of the multi-layer sealing ring 6 may be 0.35 mm, 0.5 mm, 0.6 mm, or 0.7 mm.

[0092] Optionally, the compression amount z of the third sealing layer of the multi-layer sealing ring 6 may be 0.15 mm, 0.2 mm, 0.25 mm, or 0.3 mm.

[0093] As an optional embodiment, the values ​​of the compression amounts x, y, and z are 0.2 mm, 0.5 mm, and 0.3 mm, respectively.

[0094] In some embodiments, the compressibility of the first sealing layer of the multi-layer sealing ring 6 is X1, and X1 satisfies X1=x / M;

[0095] And / or, the compressibility of the second sealing layer of the multi-layer sealing ring 6 is X2, and X2 satisfies X2=y / N;

[0096] And / or, the compressibility of the third sealing layer of the multi-layer sealing ring 6 is X3, and X3 satisfies X3=z / O.

[0097] In some embodiments, the compression rate X1 of the first sealing layer of the multi-layer sealing ring 6 ranges from 30% to 60%;

[0098] And / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring 6 is in the range of 30%-65%;

[0099] And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring 6 is in the range of 6%-12%.

[0100] By limiting the lower limit of the compression rate of each layer of the multi-layer sealing ring 6, it is possible to avoid the compression rate being too small affecting the radial compression amount and compression rate of the three-layer sealing ring, thereby affecting the sealing performance and insulation performance of the sealing ring inside the battery top cover; in addition, by limiting the upper limit of the compression rate of each layer of the multi-layer sealing ring 6, it is possible to avoid the increase in the cost of the multi-layer sealing ring 6 due to the compression rate being too large, avoid increasing the weight of the battery, and meet the lightweight requirements.

[0101] The increase in compression amount and compression rate will increase the deformation of the multi-layer sealing ring 6, thereby affecting the sealing and insulation performance between the mounting member 1 and the plate body 3.

[0102] In some embodiments, the compression rate X1 of the first sealing layer of the multi-layer sealing ring 6 is 40%;

[0103] and / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring 6 is 40%;

[0104] And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring 6 is 10%.

[0105] The following is an example of a specific implementation to illustrate the sealing and insulation performance of the cover.

[0106] Table 1 Experimental results of the embodiment (unit: mm)

[0107] Table 2 Comparative Example Test Results (Unit: mm)

[0108] It should be noted that the helium test refers to the use of a helium mass spectrometer to test the airtightness of the battery top cover. The test requires that the battery top cover is tested at a pressure of 1.2 MPa for 30 seconds from the inside out and from the outside in. The helium test leakage rate is less than 1×10 -7 Pa·m 3 / s meets the sealing requirements.

[0109] It should be noted that the penetrant test procedure is cleaning-penetration-development. Specifically, use a cleaning agent to clean all stains on the battery top cover surface. After the battery top cover surface is dry for 5 to 10 minutes, apply the penetrant. The nozzle is 20 to 30 mm away from the battery top cover surface. The penetration time is generally 5 to 15 minutes. Keep the battery top cover surface fully moistened with the penetrant. After thoroughly shaking the developer, spray it evenly at a distance of 300 mm. After spraying the developer, disassemble the battery top cover for observation. If no penetrant residue is found on the sealing ring, it means that the penetrant test has passed.

[0110] According to an embodiment of the present application, on the other hand, an electrical device is provided, including: the battery as described above.

[0111] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined in the present application.

Claims

1. A battery comprising: A plate body having a through hole formed therethrough; A pole at least partially passes through the through hole in the axial direction, wherein the pole has an abutting portion abutting against the first side of the plate body and a passing portion passing through the second side of the plate body; A mounting member, adapted to fixedly connect the pass-through portion to the plate body; A first insulating member, disposed between the mounting member and the second side of the plate body; A second insulating member is disposed between the abutting portion and the first side of the plate body; and A multi-layer sealing ring is sleeved on the outer peripheral side of the pole, the multi-layer sealing ring is arranged in a staggered manner, and each layer of the multi-layer sealing ring is respectively pressed against the first insulating member, the plate body and the second insulating member in the radial direction and compressed in the axial direction; characterized in that: The first overlap amount of the first sealing layer of the multi-layer sealing ring and the second insulating member is d, and d satisfies: d=A / 2-a / 2, the first overlap rate of the first sealing layer of the multi-layer sealing ring and the first layer of the second insulating member is ds, and ds satisfies: ds=d / (A / 2-B / 2), wherein A is the aperture of the first sealing layer of the multi-layer sealing ring, a is the aperture of the second insulating member, and B is the aperture of the second sealing layer of the multi-layer sealing ring; wherein the first overlap amount refers to the size of the overlap area of ​​the first sealing layer of the multi-layer sealing ring and the second insulating member along the axial direction, the first layer overlap rate refers to the proportion of the first overlap amount to the size of the first sealing layer of the multi-layer sealing ring along the axial direction, and the value range of the first layer overlap rate ds of the first sealing layer of the multi-layer sealing ring and the second insulating member is: 20%≤ds≤80%; And / or, the second overlap amount between the second sealing layer of the multi-layer sealing ring and the plate body is e, and e satisfies: e=B / 2-b / 2, the overlap ratio between the second sealing layer of the multi-layer sealing ring and the second layer of the plate body is es, and es satisfies: es=e / (B / 2-C / 2), wherein B is the aperture of the second sealing layer of the multi-layer sealing ring, b is the aperture of the through hole of the plate body, and C is the aperture of the third sealing layer of the multi-layer sealing ring; wherein the second overlap amount refers to the size of the overlap area between the second sealing layer of the multi-layer sealing ring and the plate body along the axial direction, the second layer overlap ratio refers to the proportion of the second overlap amount to the size of the second sealing layer of the multi-layer sealing ring along the axial direction, and the value range of the overlap ratio es between the second sealing layer of the multi-layer sealing ring and the second layer of the plate body is: 35%≤es≤75%; And / or, the third overlap amount between the third sealing layer of the multi-layer sealing ring and the first insulating member is f, and f satisfies: f=C / 2-c / 2, the overlap ratio between the third sealing layer of the multi-layer sealing ring and the third layer of the first insulating member is fs, and fs satisfies: fs=f / (C / 2-D / 2), wherein C is the aperture of the third sealing layer of the multi-layer sealing ring, c is the aperture of the first insulating member, and D is the diameter of the pole; wherein, the third overlap amount refers to the size of the overlapping area of ​​the third sealing layer of the multi-layer sealing ring along the axial direction with the first insulating member, and the third layer overlap ratio refers to the proportion of the third overlap amount to the axial size of the third sealing layer of the multi-layer sealing ring, and the overlap ratio fs between the third sealing layer of the multi-layer sealing ring and the third layer of the first insulating member ranges from 33.3%≤fs≤83.3%.

2. The battery according to claim 1, characterized in that The multi-layer sealing ring comprises three layers of sealing rings, and the three layers of sealing rings are arranged in three layers of steps along the axial direction.

3. The battery according to claim 1, characterized in that The overlap amount d between the first sealing layer of the multi-layer sealing ring and the second insulating member is in the range of 0.2 mm ≤ d ≤ 0.8 mm; and / or the overlap amount e between the second sealing layer of the multi-layer sealing ring and the plate body is in the range of 0.35 mm ≤ e ≤ 0.75 mm; And / or, the overlap amount f between the third sealing layer of the multi-layer sealing ring and the first insulating member is in the range of 0.2 mm ≤ f ≤ 0.5 mm.

4. The battery according to claim 1, characterized in that The compression amount of the first sealing layer of the multi-layer sealing ring is x, and x satisfies x=Mm, wherein M is the original height of the first sealing layer of the multi-layer sealing ring, and m is the distance between the bottom surface of the second insulating member in the axial direction and the bottom surface of the multi-layer sealing ring in the axial direction; And / or, the compression amount of the second sealing layer of the multi-layer sealing ring is y, and y satisfies y=Nn, wherein N is the original height of the second sealing layer of the multi-layer sealing ring, and n is the distance between the bottom surface of the plate body along the axial direction and the bottom surface of the multi-layer sealing ring along the axial direction; And / or, the compression amount of the third sealing layer of the multi-layer sealing ring is z, and z satisfies z=Oo, wherein O is the original height of the third sealing layer of the multi-layer sealing ring, and o is the distance between the bottom surface of the first insulating part along the axial direction and the bottom surface of the multi-layer sealing ring along the axial direction.

5. The battery according to claim 4, characterized in that The value range of the compression amount x of the first sealing layer of the multi-layer sealing ring is: 0.15mm≤x≤0.3mm; And / or, the compression amount y of the second sealing layer of the multi-layer sealing ring is in the range of: 0.35 mm ≤ y ≤ 0.7 mm; And / or, the compression amount z of the third sealing layer of the multi-layer sealing ring is in the range of 0.15 mm ≤ z ≤ 0.3 mm.

6. The battery according to claim 4, characterized in that The compression rate of the first sealing layer of the multi-layer sealing ring is X1, and X1 satisfies X1=x / M; And / or, the compression rate of the second sealing layer of the multi-layer sealing ring is X2, and X2 satisfies X2=y / N; And / or, the compression rate of the third sealing layer of the multi-layer sealing ring is X3, and X3 satisfies X3=z / O.

7. The battery according to claim 6, characterized in that The compression rate X1 of the first sealing layer of the multi-layer sealing ring is in the range of 30%-60%; And / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring is in the range of 30%-65%; And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring is in the range of 6%-12%.

8. The battery according to claim 7, characterized in that The compression rate X1 of the first sealing layer of the multi-layer sealing ring is 40%; And / or, the compression rate X2 of the second sealing layer of the multi-layer sealing ring is 40%; And / or, the compression rate X3 of the third sealing layer of the multi-layer sealing ring is 10%.

9. An electrical device, characterized in that: include: A battery as claimed in any one of claims 1 to 8.

Images