Single battery and battery pack

Abstract

The embodiment of the utility model relates to the technical field of batteries, and particularly discloses a single battery and a battery pack, and the single battery comprises a shell which is provided with a containing cavity with an opening; the electrode assembly is arranged in the accommodating cavity; the top cover covers the opening, and the top cover is connected with the shell; the first insulating part covers the outer surface of the shell; and the second insulating part comprises a second insulating main body and a second fixing part which are connected, the second insulating main body is arranged on one side, far away from the electrode assembly, of the top cover, and the second fixing part is arranged in a corner area of the second insulating main body and is fixedly connected with the first insulating part. According to the application, the corner area of the second insulating part is prevented from tilting, so that the problem of poor insulation of the single battery caused by tilting of the corner area of the second insulating part is avoided, short circuit caused by contact between the single battery and other parts is avoided, normal work and use of the single battery are ensured, and finally the safety performance of the single battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a single cell and a battery pack. Background Art

[0002] With the rapid development of mobile phones, laptops, electric vehicles, power tools, and other devices, secondary batteries with high capacity, long cycle life, and high safety performance have been widely used and developed. At the same time, the demand for the safety performance of secondary batteries is very urgent. Therefore, how to improve the safety performance of secondary batteries has become an urgent problem to be solved. Utility Model Content

[0003] The embodiments of the present application provide a single cell battery and a battery pack to improve the safety performance of the single cell battery.

[0004] In order to solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In one aspect, a single cell battery is provided, comprising: a housing having a receiving cavity with an open opening;

[0006] The electrode assembly is disposed in the accommodating cavity;

[0007] A top cover is provided on the opening and is connected to the shell;

[0008] a first insulating member covering the outer surface of the housing; and

[0009] The second insulating member includes: a second insulating body and a second fixing portion connected to each other, the second insulating body is arranged on the side of the top cover away from the electrode assembly, the second fixing portion is arranged in the corner area of ​​the second insulating body, and the second fixing portion is fixedly connected to the first insulating member.

[0010] In addition to one or more of the features disclosed above, or as an alternative, the second fixing portion extends from a corner area of ​​the second insulating body in a direction away from the second insulating body, and a bonding area is provided on a side of the second fixing portion close to the first insulating member, and the second fixing portion is bonded and fixed to the first insulating member through the bonding area.

[0011] In addition to or as an alternative to one or more of the features disclosed above, the single battery has a first direction, a second direction, and a third direction intersecting each other;

[0012] The housing includes: two first side walls arranged opposite to each other in a first direction, two second side walls arranged opposite to each other in a second direction, and an angular portion, wherein the second side wall is connected between the two first side walls, and the first side wall and the second side wall are connected via the angular portion;

[0013] A bonding area is provided on one side of the second fixing portion close to the first insulating member, and the second fixing portion is bonded and fixed to the first insulating member at the corner portion through the bonding area.

[0014] In addition to or as an alternative to one or more of the features disclosed above, the battery cell has a third direction and a reference plane perpendicular to the third direction;

[0015] Along the third direction, the orthographic projection of the second fixing portion on the reference plane is located within the orthographic projection of the second insulating body on the reference plane, and the second fixing portion is thermally melted to the first insulating member.

[0016] In addition to or as an alternative to one or more of the features disclosed above, the first insulating member includes: a first insulating body and a first fixing portion connected to each other, the first insulating body covering an outer surface of the housing, and the first fixing portion being disposed between the second insulating body and the top cover;

[0017] The orthographic projection of the second fixing portion on the reference plane is located within the orthographic projection of the first fixing portion on the reference plane, and the second fixing portion is thermally melted to the first fixing portion.

[0018] In addition to or as an alternative to one or more of the features disclosed above, the second insulating body and the second fixing portion are integrally formed.

[0019] In addition to or as an alternative to one or more of the features disclosed above, the single battery further comprises: a pole, disposed on the top cover, and electrically connected to the electrode assembly;

[0020] The second insulating body is provided with an avoidance hole, and the pole is passed through the avoidance hole.

[0021] In addition to one or more features disclosed above, or as an alternative, it also includes: a third insulating member, which is arranged on a side of the second insulating body away from the top cover, and the third insulating member is configured to press the corner area of ​​the second insulating body.

[0022] In addition to or as an alternative to one or more features disclosed above, a plurality of third insulating members are provided, and each third insulating member is respectively provided at a corresponding corner area of ​​a side of the second insulating body away from the top cover.

[0023] On the other hand, a battery pack is further disclosed. In addition to or as an alternative to one or more of the features disclosed above, the battery pack includes a box; and a single battery as described in any one of the above items, wherein the single battery is arranged in the box.

[0024] One of the above technical solutions has the following advantages or beneficial effects: This application sets a second fixing part in the corner area of ​​the second insulating body, and uses the second fixing part to fix the connection with the first insulating part to prevent the corner area of ​​the second insulating part from warping, thereby avoiding the corner area of ​​the second insulating part from warping and causing poor insulation of the single cell battery, avoiding the single cell battery from contacting other components and causing short circuit, ensuring the normal operation of the single cell battery, and ultimately improving the safety performance of the single cell battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0026] Figure 1 This is a three-dimensional structural view of a single cell provided according to the first specific embodiment of the present application;

[0027] Figure 2 is a top view of a single cell provided according to the first specific embodiment of the present application;

[0028] Figure 3 is a cross-sectional view of a single cell provided along the AA direction according to the first specific embodiment of the present application;

[0029] Figure 4 is a structural diagram of a second insulating member provided according to the first specific embodiment of the present application;

[0030] Figure 5 This is a three-dimensional structural view of a single cell provided according to the second specific embodiment of the present application;

[0031] Figure 6 is a top view of a single cell provided according to the second specific embodiment of the present application;

[0032] Figure 7 is a cross-sectional view of a single cell along direction BB provided in accordance with the second specific embodiment of the present application;

[0033] Figure 8 yes Figure 7 A partial enlarged view of point D in the middle;

[0034] Figure 9 This is a three-dimensional structural view of a single cell provided in accordance with the third specific embodiment of the present application;

[0035] Figure 10 is a top view of a single cell provided according to the third specific embodiment of the present application;

[0036] Figure 11 is a cross-sectional view of a single cell along the CC direction provided in the third specific embodiment of the present application;

[0037] Figure 12 yes Figure 11 A partial enlarged view of point E in the middle;

[0038] Figure 13 It is a schematic structural diagram of a battery pack provided according to an embodiment of the present application.

[0039] Description of reference numerals:

[0040] 100. Single cell;

[0041] 110, housing; 111, accommodating cavity; 112, corner portion; 113, first side wall; 114, second side wall;

[0042] 120. Electrode assembly;

[0043] 130, top cover;

[0044] 140. First insulating member; 141. First insulating body; 142. First fixing portion;

[0045] 150, second insulating member; 151, second insulating body; 1511, avoidance hole; 152, second fixing portion; 1521, bonding area;

[0046] 160, pole;

[0047] 170, third insulating member;

[0048] 200, box;

[0049] 300. Box cover. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and beneficial effects of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for the purpose of explaining this application and are not intended to limit this application.

[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0052] 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; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0053] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] Existing secondary batteries typically have an insulating film attached to the outer surface of the battery and an insulating patch attached to the top surface of the battery cover. Although these insulating patches have adhesive backing for adhesion to the cover, the four corners of the patch can warp after being attached to the cover, resulting in poor insulation in the secondary battery.

[0055] In order to solve the above problems, in the embodiments of the present application, referring to Figures 1 to 12The present application provides a single battery 100 having a first direction X, a second direction Y, and a third direction Z that intersect each other. Exemplarily, the single battery 100 has the first direction X, the second direction Y, and the third direction Z that are perpendicular to each other. "Perpendicular" refers to a state where the angle formed by a straight line, a straight line and a plane, or a plane and a plane is 89° to 91°.

[0056] For example, in the present application, the first direction X is the width direction of the unit battery 100 , the second direction Y is the length direction of the unit battery 100 , and the third direction Z is the height direction of the unit battery 100 .

[0057] The single cell 100 may be a secondary battery, which refers to a single cell that can be recharged to activate the active material after discharge and continue to be used. For example, the single cell 100 may be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, or a nickel-cadmium battery, but is not limited thereto.

[0058] The single battery 100 may be a prismatic battery, a soft pack battery, or a battery in another shape.

[0059] Specifically, the single cell 100 includes a housing 110 , an electrode assembly 120 , a top cover 130 , a first insulating member 140 , and a second insulating member 150 .

[0060] Specifically, the housing 110 is provided with a receiving cavity 111 having an opening; the electrode assembly 120 is provided in the receiving cavity 111; the top cover 130 is provided to cover the opening, and the top cover 130 is connected to the housing 110 to seal the housing 110 and ensure the overall sealing of the single cell 100; the first insulating member 140 covers the outer surface of the housing 110 to insulate the housing 110 from other external components and ensure the normal use of the single cell 100; illustratively, in the present application, the first insulating member 140 can be adhesively fixed to the outer surface of the housing 110. The second insulating member 150 includes: a second insulating body 151 and a second fixing portion 152 connected to each other. The second insulating body 151 is provided on the side of the top cover 130 away from the electrode assembly 120 to insulate the top cover 130 from other external components and ensure the normal use of the single cell 100. For example, in the present application, the second insulating body 151 can be adhesively fixed to the side of the top cover 130 away from the electrode assembly 120; the second fixing portion 152 is arranged in the corner area of ​​the second insulating body 151, and the second fixing portion 152 is fixedly connected to the first insulating member 140.

[0061] It should be noted that the second insulating body 151 is typically rectangular, and the corner regions refer to the corners of the second insulating body 151. To better prevent warping of the corner regions of the second insulating member 150, this embodiment provides second fixing portions 152 in all four corner regions. Alternatively, as needed, there is no limit on the number of second fixing portions 152, and second fixing portions 152 may be provided in three or two corner regions. When providing second fixing portions 152 in two corner regions, they are typically provided in two corner regions located at diagonally opposite corners, which can better prevent warping of the corner regions of the second insulating member 150.

[0062] The housing 110 and the top cover 130 can be made of a strong material such as metal, but are not limited thereto. For example, the housing 110 and the top cover 130 are both made of aluminum profiles, but are not limited thereto.

[0063] Among them, the single cell 100 also includes an electrolyte, an electrode 160 and other functional components. The electrolyte can be a conventional electrolyte or a special electrolyte with additives added. The electrolyte is used to soak the electrode assembly 120. Among them, the electrode assembly 120 is a component where the electrochemical reaction occurs in the single cell 100, and there can be one or more electrode assemblies. The electrode assembly 120 is mainly formed by winding or stacking a positive electrode sheet, a diaphragm and a negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active substances constitute the main body of the electrode assembly 120, and the parts of the positive electrode sheet and the negative electrode sheet without active substances constitute the tabs. During the charge and discharge process of the single cell 100, the positive electrode active substance and the negative electrode active substance react with the electrolyte, and the tabs are electrically connected to the electrode 160 to form a current circuit, so that the single cell 100 can be used normally.

[0064] The first insulating member 140 may be made of any one of polypropylene (PP), polyethylene terephthalate (PET), and polyimide (PI), but is not limited thereto.

[0065] The second insulating member 150 may be made of any one of polypropylene (PP), polycarbonate (PC), and polyethylene terephthalate (PET), but is not limited thereto.

[0066] The materials of the first insulating member 140 and the second insulating member 150 may be the same or different, which is not specifically limited in the present application and can be selected according to actual circumstances.

[0067] The second insulating body 151 and the second fixing portion 152 are integrally formed.

[0068] It can be understood that the present application sets a second fixing portion 152 in the corner area of ​​the second insulating body 151, and uses the second fixing portion 152 to be fixedly connected to the first insulating member 140 to prevent the corner area of ​​the second insulating member 150 from warping, thereby avoiding the corner area of ​​the second insulating member 150 from warping and causing poor insulation of the single cell 100, avoiding the single cell 100 from contacting other components and causing a short circuit, ensuring the normal operation of the single cell 100, and ultimately improving the safety performance of the single cell 100.

[0069] In the specific embodiment 1 of this application, refer to Figures 1 to 4 The second fixing portion 152 extends from the corner area of ​​the second insulating body 151 in a direction away from the second insulating body 151, and a bonding area 1521 is provided on the side of the second fixing portion 152 close to the first insulating member 140. The second fixing portion 152 is bonded and fixed to the first insulating member 140 through the bonding area 1521 to facilitate the connection and fixation between the second fixing portion 152 and the first insulating member 140, thereby avoiding the corner area of ​​the second insulating member 150 from warping up, which may cause poor insulation of the single battery 100. At the same time, it facilitates the assembly of the second insulating member 150 and improves the overall assembly efficiency of the single battery 100.

[0070] For example, in the present application, adhesive can be applied on the side of the second fixing portion 152 close to the first insulating member 140 to form a bonding area 1521 on the side of the second fixing portion 152 close to the first insulating member 140 to achieve connection and fixation between the second fixing portion 152 and the first insulating member 140.

[0071] In one embodiment, referring to Figures 1 to 3 The shell 110 includes: two first side walls 113 arranged opposite to each other in the first direction X, two second side walls 114 arranged opposite to each other in the second direction Y, and a corner portion 112, the second side wall 114 is connected between the two first side walls 113, and the first side wall 113 and the second side wall 114 are connected through the corner portion 112.

[0072] Specifically, a bonding area 1521 is provided on one side of the second fixing portion 152 close to the first insulating member 140. The second fixing portion 152 is bonded and fixed to the first insulating member 140 located at the corner portion 112 through the bonding area 1521 to achieve a connection and fixation between the second fixing portion 152 and the first insulating member 140, thereby avoiding the problem of poor insulation of the single cell 100 caused by the corner area of ​​the second insulating member 150 being warped, and saving costs at the same time.

[0073] In one embodiment, referring to Figures 1 to 4 The pole 160 is disposed on the top cover 130 , and the pole 160 and the top cover 130 are insulated from each other, and the pole 160 is electrically connected to the electrode assembly 120 .

[0074] Specifically, an avoidance hole 1511 is opened on the second insulating body 151, and the pole 160 is passed through the avoidance hole 1511 to ensure the compactness of the overall structure of the single battery 100, while facilitating the electrical connection between the pole 160 and external electrical components to ensure the normal use of the single battery 100.

[0075] Among them, the pole 160 is considered to be a positive pole, and can also be a negative pole. There is no specific limitation in this application, and it can be selected according to actual circumstances.

[0076] The pole 160 can be made of conductive metal or other materials, but is not limited thereto. For example, the pole 160 can be made of copper or aluminum, but is not limited thereto.

[0077] In the specific embodiment 2 of this application, refer to Figures 5 to 8 The single cell 100 has a reference plane P perpendicular to the third direction Z. Along the third direction Z, the orthographic projection of the second fixing portion 152 on the reference plane P lies within the orthographic projection of the second insulating body 151 on the reference plane P, i.e., the second fixing portion 152 is located on the second insulating body 151. Furthermore, the second fixing portion 152 is thermally fused to the first insulating member 140 to secure the corners of the second insulating member 150 in place, preventing them from warping. This prevents any warping that could cause poor insulation in the single cell 100, and prevents short circuits caused by contact between the single cell 100 and other components, thereby ensuring proper operation of the single cell 100.

[0078] In one embodiment, the first insulating member 140 includes: a first insulating body 141 and a first fixing portion 142 connected to each other. The first insulating body 141 covers the outer surface of the shell 110 to insulate and isolate the shell 110 from other external components; the first fixing portion 142 is arranged between the second insulating body 151 and the top cover 130 to prevent the edge of the first insulating body 141 from curling up and falling off, thereby ensuring the insulation performance of the single battery 100.

[0079] The first insulating body 141 and the first fixing portion 142 are integrally formed.

[0080] Specifically, the orthographic projection of the second fixing portion 152 on the reference plane P is located within the orthographic projection of the first fixing portion 142 on the reference plane P, i.e., the second fixing portion 152 and the first fixing portion 142 are stacked in the third direction Z, i.e., the second fixing portion 152 and the first fixing portion 142 are overlapped in the third direction Z. Specifically, the second fixing portion 152 and the first fixing portion 142 are heat-fused to secure the corners of the second insulating member 150 in place, preventing the corners of the second insulating member 150 from warping. This prevents the corners of the second insulating member 150 from warping, thereby preventing poor insulation of the battery cell 100 and contact between the battery cell 100 and other components, thereby ensuring the normal operation of the battery cell 100.

[0081] At the same time, the other technical features in the specific embodiment 2 of the present application are the same as those in the above-mentioned specific embodiment 1. In view of the detailed description of the features in the above-mentioned specific embodiment 1, the specific embodiment 2 in the present application will not be described accordingly, and the specific description can be referred to the description in the specific embodiment 1.

[0082] In the specific embodiment 3 of this application, refer to Figures 9 to 12 The single battery 100 further includes a third insulating member 170 , which is disposed on a side of the second insulating body 151 away from the top cover 130 , and is configured in a corner area where the second insulating body 151 is pressed.

[0083] The third insulating member 170 may be made of ceramic material, but is not limited thereto.

[0084] It can be understood that the present application sets a third insulating member 170 in the corner area of ​​the second insulating body 151, so as to use the third insulating member 170 to press the corner area of ​​the second insulating body 151, thereby preventing the corner area of ​​the second insulating member 150 from warping, thereby avoiding the corner area of ​​the second insulating member 150 from warping and causing poor insulation of the single cell 100, avoiding the single cell 100 from contacting other components and causing a short circuit, and ensuring the normal operation of the single cell 100.

[0085] In one embodiment, referring to Figures 9 to 12 There are multiple third insulating members 170, and each third insulating member 170 is respectively arranged at a corresponding corner area of ​​the second insulating body 151 on the side away from the top cover 130, so as to further prevent the corner area of ​​the second insulating member 150 from warping, thereby avoiding the problem of poor insulation of the single battery 100 caused by the warping of the corner area of ​​the second insulating member 150.

[0086] At the same time, the other technical features in the specific embodiment three of the present application are the same as those in the above-mentioned specific embodiment one or specific embodiment two. In view of the detailed description of the features in the above-mentioned specific embodiment one or specific embodiment two, the specific embodiment three in the present application will not be described accordingly, and specific reference may be made to the description in specific embodiment one or specific embodiment two.

[0087] On the other hand, in the embodiments of the present application, referring to Figure 13 The present application also provides a battery pack, comprising: a box body 200; a single cell 100 as described in any of the above embodiments, the single cell 100 is arranged in the box body 200; and a box cover 300, the box cover 300 is arranged on one side of the box body 200 in the first direction Z to seal the box body 200.

[0088] The battery pack may comprise three layers: single cells 100, battery modules, and battery packs. Specifically, the single cells 100 are grouped into battery modules, which are then placed in a housing 200 to form a battery pack. Alternatively, the battery pack may comprise two layers: single cells 100 and battery packs. Specifically, the single cells 100 are placed in a housing 200 to form a battery pack. This is not specifically limited in this application and may be configured based on actual circumstances, as long as it does not affect the effectiveness of this application.

[0089] On the other hand, in an embodiment of the present application, the present application further provides an electrical device including the battery pack described above, the battery pack serving as a power source for the electrical device. The electrical device may be, but is not limited to, a mobile device (e.g., a mobile phone, a laptop computer, etc.), an electric vehicle (e.g., a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an electric bicycle, an electric scooter, an electric golf cart, an electric truck, etc.), an electric train, a ship, a satellite, an energy storage system, etc.

[0090] The above steps are merely provided to help understand the method, structure, and core concept of the present application. A person skilled in the art may make several improvements and modifications to the present application without departing from the principles of the present application, and such improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A single battery, characterized in that: include: The housing is provided with a receiving cavity having an open opening; an electrode assembly, disposed in the accommodating cavity; a top cover, which covers the opening and is connected to the housing; a first insulating member covering the outer surface of the housing; as well as The second insulating member includes: a second insulating body and a second fixing portion connected to each other, the second insulating body is arranged on a side of the top cover away from the electrode assembly, the second fixing portion is arranged in a corner area of ​​the second insulating body, and the second fixing portion is fixedly connected to the first insulating member.

2. The single cell according to claim 1, wherein: The second fixing portion extends from a corner area of ​​the second insulating body toward a direction away from the second insulating body, and a bonding area is provided on a side of the second fixing portion close to the first insulating member, and the second fixing portion is bonded and fixed to the first insulating member through the bonding area.

3. The single cell according to claim 2, wherein: The single cells have a first direction, a second direction and a third direction intersecting each other; The housing includes: two first side walls arranged opposite to each other in the first direction, two second side walls arranged opposite to each other in the second direction, and an angular portion, wherein the second side wall is connected between the two first side walls, and the first side wall and the second side wall are connected via the angular portion; The bonding area is provided on a side of the second fixing portion close to the first insulating member, and the second fixing portion is bonded and fixed to the first insulating member located at the corner portion through the bonding area.

4. The single cell according to claim 1, wherein: The single battery has a third direction and a reference plane perpendicular to the third direction; Along the third direction, the orthographic projection of the second fixing portion on the reference plane is located within the orthographic projection of the second insulating body on the reference plane, and the second fixing portion is thermally melt-connected to the first insulating member.

5. The single cell according to claim 4, wherein: The first insulating member includes: a first insulating body and a first fixing portion connected to each other, the first insulating body covering the outer surface of the shell, and the first fixing portion being arranged between the second insulating body and the top cover; The orthographic projection of the second fixing portion on the reference plane is located within the orthographic projection of the first fixing portion on the reference plane, and the second fixing portion is thermally melted to the first fixing portion.

6. The single cell according to any one of claims 1 to 5, wherein: The second insulating body and the second fixing portion are integrally formed.

7. The single cell according to claim 1, wherein: The single cell further includes: a pole, which is disposed on the top cover and is electrically connected to the electrode assembly; The second insulating body is provided with an avoidance hole, and the pole is passed through the avoidance hole.

8. The single cell according to claim 1, wherein: Also includes: The third insulating member is arranged on a side of the second insulating body away from the top cover, and the third insulating member is configured to press the corner area of ​​the second insulating body.

9. The single cell according to claim 8, wherein: There are a plurality of third insulating members, each of which is disposed at a corresponding corner area of ​​the second insulating body on a side away from the top cover.

10. A battery pack, characterized in that: include: Box; as well as The single cell according to any one of claims 1 to 9, wherein the single cell is disposed in the box.

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