Battery monomer, battery and electric device

Abstract

The utility model relates to a battery monomer, a battery and a power utilization device, and relates to the technical field of batteries, a shell comprises a first wall, a mounting hole is formed in the first wall along a first direction and penetrates through the first wall, and an electrode terminal is mounted in the first wall through the mounting hole. The sealing element is arranged between the first wall and the electrode terminal, so that the sealing element is in sealing connection with the electrode terminal and the first wall. Wherein the sealing element is provided with a first surface and a second surface which are oppositely arranged along the first direction, the first surface is abutted against the first wall, and the second surface is abutted against the electrode terminal. The first wall is provided with an installation face abutting against the first face, an installation groove is formed in the installation face, the sealing piece comprises a first protruding part arranged on the first face, and at least part of the first protruding part is installed in the installation groove. By arranging the mounting groove and the first lug boss, the contact area of the sealing element and the first wall is larger, so that the sealing performance between the sealing element and the first wall is better, and the sealing performance of the battery is further enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery and an electric device. BACKGROUND

[0002] A power battery refers to a power supply for providing a power source for a tool or equipment. For example, power batteries are widely used in electric vehicles. With the development of electric vehicles, power batteries become core components and thus have great market demand.

[0003] However, in the process of preparing the battery monomer or using the battery monomer, sometimes the sealing performance of the battery monomer is poor, which affects the safety performance of the battery. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a battery monomer, a battery and an electric device to improve the sealing performance of the battery monomer.

[0005] According to one aspect of the present application, an embodiment of the present application provides a battery monomer, comprising:

[0006] A shell comprising a first wall, the first wall being provided with a mounting hole extending through the first wall along a first direction;

[0007] An electrode terminal mounted on the first wall through the mounting hole; and

[0008] A sealing member arranged between the first wall and the electrode terminal to seal the electrode terminal and the first wall, the sealing member having a first surface and a second surface arranged oppositely along the first direction, the first surface abutting against the first wall, and the second surface abutting against the electrode terminal.

[0009] The first wall has a mounting surface abutting against the first surface, and the mounting surface is provided with a mounting groove; the sealing member comprises a first protruding portion arranged on the first surface, and at least part of the first protruding portion is arranged in the mounting groove.

[0010] In one embodiment, along the radial direction of the sealing member, the size of the mounting groove in the radial direction is greater than the size of the first protruding portion in the radial direction.

[0011] In one embodiment, the difference between the size of the mounting groove in the radial direction and the size of the first protruding portion in the radial direction is 0.08mm to 0.12mm.

[0012] In one embodiment, the ratio of the size of the first protruding portion in the first direction to the size of the mounting groove in the first direction is 2 to 3.

[0013] In one embodiment, the first protruding portion is provided in plurality, and the mounting surface is provided with a plurality of mounting grooves; all the first protruding portions and all the mounting grooves are arranged one-to-one.

[0014] In one of the embodiments, all the first protrusions include a first target protrusion arranged around the electrode terminal, and a second target protrusion arranged around the first target protrusion.

[0015] In one of the embodiments, a plane perpendicular to the first direction is defined as a reference plane; a normal projection of the first target protrusion on the reference plane includes a first contour line facing away from the mounting hole; a normal projection of the second target protrusion on the reference plane includes a second contour line close to the mounting hole; the first contour line and the second contour line are both in a closed structure; and the distance between the first contour line and the second contour line is 0.2mm to 0.4mm in the radial direction.

[0016] In one of the embodiments, the first protrusions are also arranged on the second plane, the first wall further has a matching plane abutting against the second plane, the matching plane is provided with a mounting groove, at least part of the first protrusions are arranged in the mounting groove, and the at least two first protrusions are arranged opposite to each other in the first direction; and / or

[0017] A side of the sealing member close to the mounting hole is defined as an inner side in the direction perpendicular to the first direction, and a side of the sealing member facing away from the mounting hole is defined as an outer side;

[0018] The sealing member further includes a sealing body and a second protrusion connected to each other, the second protrusion is arranged on the first plane, and an inner side surface of the second protrusion is connected to an inner side surface of the sealing body; and / or

[0019] The battery cell further includes an insulating member, the insulating member is arranged around the electrode terminal, and the insulating member abuts against the sealing member.

[0020] According to another aspect of the present application, the embodiments of the present application provide a battery, including the battery cell in any of the above embodiments.

[0021] According to another aspect of the present application, the embodiments of the present application provide a use electric device, including the battery in any of the above embodiments.

[0022] The battery cell, the battery and the electric device, the battery cell comprises a shell, an electrode terminal and a sealing element. The shell comprises a first wall, a mounting hole is formed in the first wall by penetrating the first wall in a first direction, and the electrode terminal is mounted in the first wall through the mounting hole. The sealing element is arranged between the first wall and the electrode terminal to realize sealing connection of the sealing element, the electrode terminal and the first wall. The sealing element has a first surface and a second surface arranged oppositely in the first direction, the first surface abuts against the first wall, and the second surface abuts against the electrode terminal. The first wall has a mounting surface abutting against the first surface, and the mounting surface is provided with a mounting groove. The sealing element comprises a first protruding part arranged on the first surface, and the first protruding part is at least partially mounted in the mounting groove. By arranging the mounting groove and the first protruding part, the contact area of the sealing element and the first wall is larger, the sealing performance between the sealing element and the first wall is better, and the sealing performance of the battery is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the battery cell in some embodiments of the application.

[0024] Figure 2 It is a schematic diagram of the first wall of the battery cell in some embodiments of the application. Figure 1

[0025] Figure 3 It is a schematic diagram of the first wall in some embodiments of the application at a-a. Figure 2

[0026] Figure 4 It is a local enlarged view of the first wall in some embodiments of the application at e. Figure 3

[0027] Figure 5 It is a schematic diagram of the sealing element in the first wall in some embodiments of the application on a reference surface. Figure 2

[0028] DETAILED DESCRIPTION

[0029] 100, battery cell, 110, shell, 1101, shell body, 111, electrode assembly, 1112, end cover, b1, first wall, A, liquid injection hole, 2, electrode terminal, F, explosion-proof valve, 3, sealing element, 31, sealing body, M1, first surface, M2, second surface, AM, mounting surface, T1, first protruding part, T2, second protruding part, C, mounting groove, MT1, first target protruding part, MT2, second target protruding part, S, reference surface, X1, first contour line, X2, second contour line, PM, matching surface, K, mounting hole, 4, insulating element;

[0030] F1, first direction, F2, radial direction. DETAILED DESCRIPTION ​​​​

[0031] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and with modifications thereof, without departing from the scope of the present application, and it is understood that these specific embodiments are given for purposes of example and exemplary description only and are not presented in a way of limitation to the present application.

[0032] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0033] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intermediate element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0037] Referring to Figure 1 , Figure 1 A schematic diagram of the exploded structure of a battery cell 100 in some embodiments of the present application is shown. The battery cell 100 includes a housing 110, an electrode assembly 111, and other functional components. The housing 110 includes a shell 1101 and an end cap 1112. The end cap 1112 refers to a component that can be covered on the shell 1101 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 1112 can be adapted to the shape of the shell 1101 to fit the shell 1101. Alternatively, the end cap 1112 can be made of a material with certain hardness and strength, such as an aluminum alloy, so that the end cap 1112 is not easily deformed when subjected to extrusion and impact, so that the battery cell 100 can have higher structural strength and safety performance can also be improved. The material of the end cap 1112 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations.

[0038] Continuing to refer to Figure 1 , in conjunction with referring to Figure 2 , Figure 2 For Figure 1Figure 1 is a perspective view of a first wall b1 of a battery monomer 100. The housing 110 is a component with wall structure. The housing 110 includes the first wall b1, and the first wall b1 is provided with a liquid injection hole A. Exemplarily, the first wall b1 can refer to an end cover 1112 at both ends of the battery, or a side wall at the side of the battery, as long as it is a wall constituting the housing 110, which is not specifically limited herein. The exterior and interior of the housing 110 are relative. The interior of the housing 110 is used to form the internal environment of the battery monomer 100. Correspondingly, the exterior of the housing 110 is the external environment of the battery monomer 100. In the embodiment of the present application, the case where the first wall b1 is the end cover 1112 is illustrated.

[0039] The housing 1101 is a component used in cooperation with the end cover 1112 to form the internal environment of the battery monomer 100, wherein the formed internal environment can be used to accommodate electrolyte (not shown in the figure) and other components. The housing 1101 and the end cover 1112 can be independent components. Without limitation, the end cover 1112 and the housing 1101 can also be integrated, specifically, the end cover 1112 and the housing 1101 can form a common connecting surface before other components enter the housing, and when it is necessary to seal the interior of the housing 1101, the end cover 1112 is covered on the housing 1101. The housing 1101 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. The material of the housing 1101 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not specifically limited in the embodiment of the present application. The explosion-proof valve F is a necessary component in the battery monomer 100. When the battery monomer 100 is overcharged or over-discharged, a large amount of additional gas will be generated in the battery monomer 100, so it is necessary to set an explosion-proof component to reduce the risk of explosion of the battery monomer 100.

[0040] Continuing to refer to Figure 1 and Figure 2 , the battery monomer 100 provided by an embodiment of the present application includes a housing 110, an electrode terminal 2, and a sealing member 3. The housing 110 includes a first wall b1, and a mounting hole K is formed through the first wall b1 along a first direction F1, and the electrode terminal 2 is mounted in the first wall b1 by means of the mounting hole K.

[0041] Electrode assembly 111 is the component in the battery cell 100 where electrochemical reactions occur. The casing 1101 may contain one or more electrode assemblies 111. The electrode assembly 111 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 111, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 2 to form a current loop.

[0042] Continue to refer to Figure 1 and Figure 2 and in conjunction with reference Figure 3 and Figure 4 , Figure 3 It shows Figure 2 A schematic cross-sectional view of the first wall b1 at point aa. Figure 4 It shows Figure 3 A magnified view of the first wall b1 at point e. Figure 4 The outer contour lines of the seal 3 interfere with the first wall b1 to demonstrate the tight fit between the seal 3 and the first wall b1. Similarly, in Figure 4 The outer contour lines of the sealing element 3 also interfere with the electrode terminal 2, which is to demonstrate the tight fit between the sealing element 3 and the electrode terminal 2. By placing the sealing element 3 between the first wall b1 and the electrode terminal 2, the electrode terminal 2 and the first wall b1 are sealed together, improving the overall sealing performance of the structure. Furthermore, the sealing element 3 has a first surface M1 and a second surface M2 arranged opposite to each other along the first direction F1. The first surface M1 abuts against the first wall b1, and the second surface M2 abuts against the electrode terminal 2. The first wall b1 has a mounting surface AM that abuts against the first surface M1, and a mounting groove C is provided on the mounting surface AM. The sealing element 3 includes a first protrusion T1 provided on the first surface M1, at least a portion of which is installed in the mounting groove C. Thus, the contact area between the first wall b1 and the sealing element 3 is larger, thereby increasing the friction between the sealing element 3 and the first wall b1, making the connection between the first wall b1 and the sealing element 3 tighter, and thus improving the overall sealing performance of the structure.

[0043] In some embodiments of this application, reference continues to be made to... Figure 3 and Figure 4 Along the radial direction F2 of the seal 3, the dimension of the mounting groove C in the radial direction F2 is greater than the dimension of the first protrusion T1 in the radial direction F2.

[0044] Thus, an assembly gap is left between the first protrusion T1 and the mounting groove C, making it easier for the first protrusion T1 to be installed in the mounting groove C.

[0045] In some embodiments of the present application, continuing to refer to Figure 3 and Figure 4 , the difference between the size of the mounting groove C in the radial direction F2 and the size of the first protruding portion T1 in the radial direction F2 is 0.08mm to 0.12mm.

[0046] In this way, the radial direction F2 size of the mounting groove C is set to be greater than the radial direction F2 size of the first protruding portion T1 by 0.08mm to 0.12mm, which can have the advantages of facilitating assembly and facilitating the outer surface of the first protruding portion T1 to abut against the mounting groove C.

[0047] It can be understood that if the radial direction F2 size of the mounting groove C is set to be much larger than the radial direction F2 size of the first protruding portion T1, although the first protruding portion T1 is easy to be placed entirely in the mounting groove C, due to the large gap between the first protruding portion T1 and the mounting groove C, more force needs to be applied to the sealing member 3 to achieve the outer surface of the first protruding portion T1 to abut against the mounting groove C, at which time the sealing member 3 is at risk of being compressed too much. If the radial direction F2 size of the mounting groove C is set to be much smaller than the radial direction F2 size of the first protruding portion T1, the first protruding portion T1 may not be easy to be installed into the mounting groove C. Therefore, the radial direction F2 size of the mounting groove C is set to be greater than the radial direction F2 size of the first protruding portion T1 by 0.08mm to 0.12mm, which can have the advantages of facilitating assembly and facilitating the outer surface of the first protruding portion T1 to abut against the mounting groove C.

[0048] In some embodiments of the present application, continuing to refer to Figure 3 and Figure 4 , the ratio of the size of the first protruding portion T1 in the first direction F1 to the size of the mounting groove C in the first direction F1 is 2 to 3.

[0049] In this way, it can be understood that along the radial direction F2 of the sealing member 3, the size of the mounting groove C in the radial direction F2 is greater than the size of the first protruding portion T1 in the radial direction F2, and the size of the first protruding portion T1 in the first direction F1 needs to be set to be greater than the size of the mounting groove C in the first direction F1, so that after the force is applied to the sealing member 3, the sealing member 3 can extend in the radial direction F2 to fill the mounting groove C. And in the overall structural design of the battery monomer 100, the smaller the size of the mounting groove C in the first direction F1 is set, the smaller the size of the sealing member 3 in the first direction F1 is designed, which reduces the risk of overwork wear phenomenon after the size of the sealing member 3 in the first direction F1 is too large after being compressed multiple times.

[0050] Then, the ratio of the size of the first protruding part T1 in the first direction F1 to the size of the mounting groove C in the first direction F1 is set to 2 to 3. In this way, the risk of over-compression and under-compression of the sealing member 3 can be reduced. It can be understood that if the size of the first protruding part T1 in the first direction F1 is set to be much larger than the size of the mounting groove C in the first direction F1, more force needs to be applied to the sealing member 3 to enable the size of the sealing member 3 in the first direction F1 to be accommodated in the mounting groove C, and the sealing member 3 is at risk of being over-compressed. If the size of the first protruding part T1 in the first direction F1 is set to be slightly larger than the size of the mounting groove C in the first direction F1, after the force is applied to the sealing member 3, the first protruding part T1 is at risk of not being able to fully contact the inner wall of the mounting groove C, and the compression force received by the first protruding part T1 can be less than the minimum compression amount required by the design, which can cause the sealing member 3 to fail to effectively seal. Therefore, by setting the ratio of the size of the first protruding part T1 in the first direction F1 to the size of the mounting groove C in the first direction F1 to 2 to 3, the risk of over-compression and the risk of under-compression of the sealing member 3 can be reduced.

[0051] In some embodiments of the present application, continuing to refer to Figure 3 and Figure 4 , the first protruding part T1 is provided in plurality, the mounting surface AM is provided with a plurality of mounting grooves C, and all the first protruding parts T1 and all the mounting grooves C are provided in one-to-one correspondence.

[0052] In this way, by providing more first protruding parts T1 and more mounting grooves C, the friction between the sealing member 3 and the first wall b1 is further increased, the connection between the first wall b1 and the sealing member 3 is more tightly connected, and the sealing performance of the overall structure is further improved.

[0053] In some embodiments of the present application, continuing to refer to Figure 5 and Figure 5 , and in combination with referring to Figure 2 , Figures 3 to 5 a schematic diagram of the normal projection of the sealing member 3 in the first wall b1 in Figures 3 to 5 onto the reference surface is shown. All the first protruding parts T1 include a first target protruding part MT1 arranged around the electrode terminal 2, and a second target protruding part MT2 arranged around the first target protruding part MT1. Wherein, “around” means that one component or feature is surrounded or encircled by another component or feature, and in the present application, it specifically means that the first target protruding part MT1 is surrounded or encircled by the second target protruding part MT2. It can be understood that the first target protruding part MT1 and the second target protruding part MT2 can be a closed structure, or can be composed of multiple sub-protruding parts. In this way, the gap between the first wall b1 and the electrode terminal 2 is further filled, and the sealing performance of the battery monomer 100 is improved.

[0054] In some embodiments of the present application, continuing to refer to Figure 3 , the face perpendicular to the first direction F1 is defined as the reference face S. The orthogonal projection of the first target protrusion MT1 on the reference face S includes a first contour line X1 away from the mounting hole K, and the orthogonal projection of the second target protrusion MT2 on the reference face S includes a second contour line X2 close to the mounting hole K. Both the first contour line X1 and the second contour line X2 are in a closed structure. In the radial direction F2, the distance between the first contour line X1 and the second contour line X2 is 0.2mm to 0.4mm.

[0055] It can be understood that the first contour line X1 and the second contour line X2 can be circular, square, hexagonal, etc. The distance between the first contour line X1 and the second contour line X2 in the radial direction F2 is the same, and the distance between the first target protrusion MT1 and the second target protrusion MT2 is uniform, which helps to achieve better symmetry and uniformity, thereby improving the overall performance of the seal 3.

[0056] The distance between the first contour line X1 and the second contour line X2 is set to 0.2mm to 0.4mm, which can further improve the strength of the structure of the seal 3. If the distance between the first target protrusion MT1 and the second target protrusion MT2 is too small, the first target protrusion MT1 and the second target protrusion MT2 will have the risk of stress concentration. Therefore, considering the manufacturing tolerance and the overall space of the seal 3, the distance between the first contour line X1 and the second contour line X2 can be set to 0.2mm to 0.4mm.

[0057] In some embodiments of the present application, continuing to refer to ​ , the first protrusion T1 is also provided on the second face M2, and the first wall b1 also has a mating face PM abutting against the second face M2, the mating face PM is provided with a mounting groove C, at least part of the first protrusion T1 is mounted in the mounting groove C, and at least two first protrusions T1 are oppositely arranged along the first direction F1; and / or, the side of the seal 3 close to the mounting hole K is defined as the inner side along the direction perpendicular to the first direction F1, and the side of the seal 3 away from the mounting hole K is defined as the outer side; the seal 3 further comprises a sealing body 31 and a second protrusion T2 connected to each other, the second protrusion T2 is provided on the first face M1; and the inner side face of the second protrusion T2 is connected to the inner side face of the sealing body 31; and / or, the battery monomer 100 further comprises an insulating piece 4, the insulating piece 4 surrounds the electrode terminal 2, and the insulating piece 4 abuts against the seal 3.

[0058] In the case that the first protruding part T1 is further arranged on the second surface M2, the first wall b1 further has a matching surface PM abutting against the second surface M2, the matching surface PM is provided with a mounting groove C, at least part of the first protruding part T1 is arranged in the mounting groove C, and at least two first protruding parts T1 are oppositely arranged along the first direction F1, the first protruding part T1 is arranged on both the first surface M1 and the second surface M2 oppositely arranged along the first direction F1 of the sealing member 3, and the mounting groove C matched with the first protruding part T1 is arranged on the first wall b1, which can increase the contact area between the sealing member 3 and the electrode terminal 2, further increase the friction between the sealing member 3 and the electrode terminal 2, and further improve the sealing performance of the sealing member 3 structure. In addition, the at least two first protruding parts T1 are oppositely arranged along the first direction F1, and among all the first protruding parts T1, there can be two first protruding parts T1 oppositely arranged along the first direction F1, or there can be multiple first protruding parts T1 oppositely arranged along the first direction F1. In this way, the stress of the sealing member 3 along the first direction F1 is more balanced, so that the sealing member 3 is more stably clamped between the first wall b1 and the electrode terminal 2 and is not easy to shake, thereby further improving the sealing performance of the battery monomer 100.

[0059] In the case that the first protruding part T1 is further arranged on the second surface M2, the first wall b1 further has a matching surface PM abutting against the second surface M2, the matching surface PM is provided with a mounting groove C, at least part of the first protruding part T1 is arranged in the mounting groove C, and at least two first protruding parts T1 are oppositely arranged along the first direction F1, the first protruding part T1 is arranged on both the first surface M1 and the second surface M2 oppositely arranged along the first direction F1 of the sealing member 3, and the mounting groove C matched with the first protruding part T1 is arranged on the first wall b1, which can increase the contact area between the sealing member 3 and the electrode terminal 2, further increase the friction between the sealing member 3 and the electrode terminal 2, and further improve the sealing performance of the sealing member 3 structure. In addition, the at least two first protruding parts T1 are oppositely arranged along the first direction F1, and among all the first protruding parts T1, there can be two first protruding parts T1 oppositely arranged along the first direction F1, or there can be multiple first protruding parts T1 oppositely arranged along the first direction F1. In this way, the stress of the sealing member 3 along the first direction F1 is more balanced, so that the sealing member 3 is more stably clamped between the first wall b1 and the electrode terminal 2 and is not easy to shake, thereby further improving the sealing performance of the battery monomer 100.

[0060] In the case that the battery monomer 100 further comprises an insulating member 4, the insulating member 4 surrounds the electrode terminal 2, and the insulating member 4 abuts against the sealing member 3, the insulating member 4 can be used to isolate the electrode terminal 2 in the shell 1101 from the first wall b1, so as to reduce the risk of short circuit. For example, the material of the insulating member 4 can be plastic, rubber, etc. In addition, the insulating member 4 abuts against the sealing member 3, which further reduces the risk of the sealing member 3 shaking between the first wall b1 and the electrode terminal 2.

[0061] The first protruding part T1 is also arranged on the second surface M2, the first wall b1 further has a matching surface PM abutting against the second surface M2, the matching surface PM is provided with a mounting groove C, at least part of the first protruding part T1 is arranged in the mounting groove C, and at least two first protruding parts T1 are arranged oppositely along the first direction F1. The inner side of the sealing element 3 is defined as the side of the sealing element 3 close to the mounting hole K, and the outer side of the sealing element 3 is defined as the side of the sealing element 3 away from the mounting hole K. The sealing element 3 further comprises a second protruding part T2 arranged on the first surface M1, the second protruding part T2 protrudes from the second surface M2 of the sealing body 31 to the side away from the sealing element 3 along the first direction F1, and the inner side surface of the second protruding part T2 is connected with the inner side surface of the sealing body 31. The battery monomer 100 further comprises an insulating element 4 arranged around the electrode terminal 2, and the insulating element 4 abuts against the sealing element 3. The above-mentioned technical solutions can be combined arbitrarily according to actual conditions.

[0062] In order to facilitate understanding of the structure of the battery monomer 100 of the present application, the assembly steps of the battery monomer 100 are exemplarily described below:

[0063] For reference, ​ First, the first protruding part T1 on the sealing element 3 is arranged corresponding to the mounting groove C on the electrode terminal 2, the sealing element 3 is arranged on the electrode terminal 2, and then the electrode terminal 2 is arranged on the first wall b1 through the mounting hole K. At this time, the mounting groove C of the first wall b1 and the first protruding part T1 on the sealing element 3 are arranged corresponding. Then, the formed combination is injection molded to form the insulating element 4, and finally the molded part is obtained.

[0064] Based on the same inventive concept, the embodiment of the present application provides a battery comprising the battery monomer 100 in any of the above embodiments.

[0065] The battery monomer 100 has the advantages described above, and the battery also has the same advantages, which will not be repeated here.

[0066] Based on the same inventive concept, the embodiment of the present application provides a battery comprising the battery monomer 100 in any of the above embodiments.

[0067] The battery has the advantages described above, and the battery also has the same advantages, which will not be repeated here.

[0068] It should be noted that the battery monomer 100 disclosed in the embodiments of the present application is used in a battery, which can be used in a power device such as a vehicle, a ship or an aircraft, but is not limited to this. The power supply system of the power device can be composed of the battery disclosed in the present application and other components.

[0069] The embodiments of the present application provide a power consumption device using a battery as a power supply, which can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric automobile, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0070] The technical features of the above embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0071] The above embodiments only express several implementation manners of the present application, and the description is specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery cell, characterized by, The battery monomer comprises: a housing comprising a first wall, the first wall being provided with a mounting hole penetrating through the first wall along a first direction; an electrode terminal mounted on the first wall by means of the mounting hole; and a sealing member arranged between the first wall and the electrode terminal to seal the connection between the electrode terminal and the first wall, the sealing member having a first surface and a second surface arranged oppositely along the first direction, the first surface being in abutment with the first wall, and the second surface being in abutment with the electrode terminal; wherein the first wall is provided with a mounting surface in abutment with the first surface, the mounting surface being provided with a mounting groove; and the sealing member comprises a first protruding portion arranged on the first surface, at least part of the first protruding portion being arranged in the mounting groove. Along a radial direction of the sealing member, a size of the mounting groove in the radial direction is greater than a size of the first protruding portion in the radial direction.

2. The battery cell of claim 1, wherein, A difference between the size of the mounting groove in the radial direction and the size of the first protruding portion in the radial direction is 0.08mm to 0.12mm.

3. The battery cell of claim 2, wherein, A ratio between a size of the first protruding portion in the first direction and a size of the mounting groove in the first direction is 2 to 3.

4. The battery cell of claim 1, wherein, The first protruding portion is arranged in plurality, and the mounting surface is provided with a plurality of the mounting grooves; all the first protruding portions and all the mounting grooves are arranged in one-to-one correspondence.

5. The battery cell of claim 1, wherein, All the first protruding portions comprise a first target protruding portion arranged around the electrode terminal, and a second target protruding portion arranged around the first target protruding portion.

6. The battery cell of claim 5, wherein, A surface perpendicular to the first direction is defined as a reference surface; a projection of the first target protruding portion on the reference surface comprises a first contour line facing away from the mounting hole; a projection of the second target protruding portion on the reference surface comprises a second contour line close to the mounting hole; the first contour line and the second contour line are both in closed structure; along the radial direction, a distance between the first contour line and the second contour line is 0.2mm to 0.4mm.

7. The battery cell of claim 6, wherein, The first protruding portion is further arranged on the second surface, the first wall is further provided with a matching surface in abutment with the second surface, the matching surface is provided with the mounting groove, at least part of the first protruding portion is arranged in the mounting groove, and at least two first protruding portions are arranged oppositely along the first direction; and / or 8. The battery cell of any one of claims 1 to 7, wherein, A side of the sealing member close to the mounting hole along a direction perpendicular to the first direction is defined as an inner side, and a side of the sealing member facing away from the mounting hole is defined as an outer side; The sealing member further comprises a sealing body and a second protruding portion connected to each other, the second protruding portion is arranged on the first surface, and an inner side surface of the second protruding portion is connected to an inner side surface of the sealing body; and / or The battery monomer further comprises an insulating member, the insulating member is arranged around the electrode terminal, and the insulating member is in abutment with the sealing member. The battery comprises the battery monomer according to any one of claims 1 to 8.

9. A battery, characterized by The battery comprises the battery monomer according to claim 9.

10. An electrical device, characterized by ​

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