Cover plate assembly, battery, battery pack and electric equipment

Abstract

The utility model discloses a cover plate assembly, a battery, a battery pack and electric equipment, the cover plate assembly comprises a leading-out terminal, an insulating part, a cover plate main body, a pole and a sealing part, and the leading-out terminal, the insulating part and the cover plate main body are stacked along a first direction; the cover plate assembly is provided with a pole column hole, the pole column penetrates through the pole column hole to be connected with the leading-out terminal, and a gap is formed between the pole column and the pole column hole; at least one of the leading-out terminal, the insulating part and the cover plate main body is provided with an air guide groove, one end of the air guide groove is communicated with the gap, and the other end is communicated with external atmosphere; the air guide groove meets the relational expression that S2 / S1 is larger than 0 and smaller than or equal to 0.5. S1 is the area of the air guide face where the air guide grooves are located, and S2 is the sum of the surface areas of all the air guide grooves on the air guide face where the air guide grooves are located. The size of the air guide groove and the size of the air guide face where the air guide groove is located are limited, so that the influence of the air guide groove on the strength of the leading-out terminal, the insulating part or the cover plate body is reduced to the minimum, and the strength of the cover plate assembly is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cover assembly, a battery, a battery pack, and an electrical device. Background Art

[0002] The cover assembly of the battery usually includes a cover body, an insulating member, a lead terminal, a pole and a sealing member. The cover body and the insulating member are provided with a pole hole, and the pole passes through the pole hole to be connected with the lead terminal. The sealing member is provided between the pole and the pole hole to form a seal between the pole and the pole hole, thereby isolating the internal space and the external space of the battery from each other, thereby improving the stability of the battery operation.

[0003] During the assembly process, the seal may fail or be missed. However, when the battery is subjected to helium inspection, the existing cover assembly cannot detect the sealing status of the seal through helium, which increases the safety hazard of the battery to a certain extent. Utility Model Content

[0004] The purpose of the present application is to provide a cover assembly, a battery and an electrical device, aiming to solve the problem in the related art that the cover assembly cannot detect the sealing state of the seal through helium detection.

[0005] To achieve the purpose of the present application, in a first aspect, the present application proposes a cover plate assembly, the cover plate assembly comprising a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0006] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0007] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0008] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0009] At least one of the lead terminal, the insulating member and the cover plate body is provided with an air guide surface, and an air guide groove is provided on the air guide surface, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove satisfies the relationship: 0<S2 / S1≤0.5;

[0010] Wherein, S1 is the area of ​​the air guiding surface where the air guiding groove is located;

[0011] S2 is the sum of the surface areas of all the air guiding grooves on the air guiding surface where the air guiding grooves are located.

[0012] The technical solution of the present application is to provide an air guide groove on at least one of the lead-out terminal, the insulating member and the cover body, and connect the gap between the pole and the pole hole and the external atmosphere through the air guide groove. When the seal is missing or the seal fails, the helium in the helium detection process can leak into the external atmosphere through the air guide groove. When the detection device detects helium in the external atmosphere, it can be determined that the seal has failed or the seal is missing, thereby improving the accuracy of helium detection. At the same time, the present application limits the size of the air guide groove and the air guide surface where it is located to minimize the impact of the opening of the air guide groove on the strength of the lead-out terminal, the insulating member or the cover body, thereby improving the accuracy of helium detection while ensuring the strength of the cover assembly.

[0013] In a possible implementation, the air guide surface is provided on a side of the lead terminal facing the insulating member, and the air guide groove satisfies at least one of the following relationships:

[0014] 0<L1 / H1≤0.5, 0<W1*H1 / W2*L1≤0.5;

[0015] Wherein, H1 is the distance from the air guide surface to the side of the lead terminal away from the insulating member;

[0016] L1 is the maximum depth of the air guide groove;

[0017] W1 is the maximum width of the air guide groove;

[0018] W2 is the length of the air guide surface in the width direction of the air guide groove.

[0019] In a possible implementation, the air guide surface is provided on a side of the insulating member facing the lead terminal, and the air guide groove satisfies at least one of the following relationships:

[0020] 0<L2 / H2≤0.5, 0<W2*H2 / W3*L2≤0.5;

[0021] Wherein, H2 is the distance from the air guide surface to the side of the insulating member away from the lead-out terminal;

[0022] L2 is the maximum depth of the air guide groove;

[0023] W3 the maximum width of the air guide groove;

[0024] W4 is the length of the air guide surface in the width direction of the air guide groove.

[0025] In a possible implementation, the air guide surface is provided on a side of the insulating member facing the cover plate body, and the air guide groove satisfies at least one of the following relationships:

[0026] 0<L3 / H3≤0.5, 0<W4*H3 / W5*L3≤0.5;

[0027] Wherein, H3 is the distance from the air guide surface to the side of the insulating member away from the cover plate body;

[0028] L3 is the maximum depth of the air guide groove;

[0029] W5 is the maximum width of the air guide groove;

[0030] W6 is the length of the air guiding surface in the width direction of the air guiding groove.

[0031] In a possible implementation, the air guide surface is provided on a side of the cover plate body facing the insulating member, and the air guide groove satisfies at least one of the following relationships:

[0032] 0<L4 / H4≤0.5, 0<W6*H4 / W7*L4≤0.5;

[0033] Wherein, H4 is the distance from the air guide surface to the side of the cover plate body facing away from the insulating member;

[0034] L4 is the maximum depth of the air guide groove;

[0035] W7 is the maximum width of the air guide groove;

[0036] W8 is the length of the air guide surface in the width direction of the air guide groove.

[0037] In a possible implementation, the air guide groove includes a first groove section extending along a third direction and a second groove section extending along a second direction;

[0038] The second direction, the third direction and the first direction are three directions perpendicular to each other.

[0039] In a possible implementation manner, the first slot segment includes a plurality of curved segments, and the plurality of curved segments are connected along the third direction.

[0040] In a possible implementation, the cross-sectional shape of the first slot segment perpendicular to the third direction includes one of a rectangle, a semicircle, and a broken line;

[0041] A cross-sectional shape of the second slot segment perpendicular to the second direction includes a rectangular shape, a semicircular shape, and a broken line shape.

[0042] In a possible implementation, the insulating member includes a bottom wall and a side wall disposed around the bottom wall, the bottom wall and the side wall enclose a mounting cavity, the mounting cavity is used to accommodate the lead terminal, and the mounting cavity has an opening;

[0043] The first groove section and the second groove section are arranged on a side of the bottom wall facing the installation cavity;

[0044] The air guide groove further includes a third groove section and a fourth groove section, wherein the third groove section is arranged on the side of the side wall facing the installation cavity, one end of the third groove section is connected to the first groove section, and the other end extends toward the opening;

[0045] The fourth slot section is arranged on a side of the side wall facing the installation cavity, one end of the fourth slot section is connected to the second slot section, and the other end of the fourth slot section extends toward the opening.

[0046] In a second aspect, the present application further proposes a cover plate assembly, the cover plate assembly comprising: a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0047] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0048] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0049] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0050] At least one of the lead-out terminal or the cover plate body is provided with an air guide groove, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere.

[0051] The technical solution of the present application provides the air guide groove on the lead-out terminal or the cover plate body with higher material strength, thereby reducing the impact of the air guide groove on the cover plate assembly, improving the strength of the cover plate assembly, and extending the service life of the cover plate assembly.

[0052] In a possible implementation, the air guide surface is provided on a side of the lead terminal facing the insulating member, and the air guide groove satisfies at least one of the following relationships:

[0053] 0<L5 / H5≤0.5, 0<W8*H5 / W9*L5≤0.5;

[0054] Wherein, H5 is the distance from the air guide surface to the side of the lead terminal away from the insulating member;

[0055] L5 is the maximum depth of the air guide groove;

[0056] W8 is the maximum width of the air guide groove;

[0057] W9 is the length of the air guide surface in the width direction of the air guide groove.

[0058] In a possible implementation, the air guide surface is provided on a side of the cover plate body facing the insulating member, and the air guide groove satisfies at least one of the following relationships:

[0059] 0<L6 / H6≤0.5, 0<W10*H6 / W11*L6≤0.5;

[0060] Wherein, H6 is the distance from the air guide surface to the side of the cover plate body facing away from the insulating member;

[0061] L6 is the maximum depth of the air guide groove;

[0062] W10 is the maximum width of the air guide groove;

[0063] W11 is the length of the air guide surface in the width direction of the air guide groove.

[0064] In a third aspect, the present application further proposes a battery, comprising:

[0065] case;

[0066] A cover plate assembly, wherein the cover plate assembly is arranged on the shell, and the cover plate assembly and the shell are surrounded to form a receiving space;

[0067] The pole core is accommodated in the accommodation space; the cover plate assembly comprises:

[0068] It comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0069] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0070] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0071] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0072] At least one of the lead terminal, the insulating member and the cover plate body is provided with an air guide surface, and an air guide groove is provided on the air guide surface, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove satisfies the relationship: 0<S2 / S1≤0.5;

[0073] Wherein, S1 is the area of ​​the air guiding surface where the air guiding groove is located;

[0074] S2 is the sum of the surface areas of all the air guide grooves on the air guide surface where the air guide grooves are located; or

[0075] The cover plate assembly comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0076] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0077] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0078] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0079] At least one of the lead-out terminal or the cover plate body is provided with an air guide groove, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere.

[0080] In a fourth aspect, the present application further proposes a battery pack, the battery pack comprising a battery, the battery comprising a housing;

[0081] A cover plate assembly, wherein the cover plate assembly is arranged on the shell, and the cover plate assembly and the shell are surrounded to form a receiving space;

[0082] The pole core is accommodated in the accommodation space; the cover plate assembly comprises:

[0083] It comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0084] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0085] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0086] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0087] At least one of the lead terminal, the insulating member and the cover plate body is provided with an air guide surface, and an air guide groove is provided on the air guide surface, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove satisfies the relationship: 0<S2 / S1≤0.5;

[0088] Wherein, S1 is the area of ​​the air guiding surface where the air guiding groove is located;

[0089] S2 is the sum of the surface areas of all the air guide grooves on the air guide surface where the air guide grooves are located; or

[0090] The cover plate assembly comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0091] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0092] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0093] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0094] At least one of the lead-out terminal or the cover plate body is provided with an air guide groove, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere.

[0095] In a fifth aspect, the present application further proposes an electrical device, the electrical device comprising a battery or a battery pack, the battery pack comprising a battery, and the battery comprising a housing;

[0096] A cover plate assembly, wherein the cover plate assembly is arranged on the shell, and the cover plate assembly and the shell are surrounded to form a receiving space;

[0097] The pole core is accommodated in the accommodation space; the cover plate assembly comprises:

[0098] It comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0099] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0100] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0101] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0102] At least one of the lead terminal, the insulating member and the cover plate body is provided with an air guide surface, and an air guide groove is provided on the air guide surface, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove satisfies the relationship: 0<S2 / S1≤0.5;

[0103] Wherein, S1 is the area of ​​the air guiding surface where the air guiding groove is located;

[0104] S2 is the sum of the surface areas of all the air guide grooves on the air guide surface where the air guide grooves are located; or

[0105] The cover plate assembly comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction;

[0106] The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body;

[0107] The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole;

[0108] The sealing member is arranged in the gap, and the sealing member is used to seal the gap;

[0109] At least one of the lead-out terminal or the cover plate body is provided with an air guide groove, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0111] Figure 1 An exploded view of an embodiment of a cover assembly provided by the present application;

[0112] Figure 2 A top view of the lead-out terminal when the air guide groove is located at the lead-out terminal;

[0113] Figure 3 for Figure 2 A cross-sectional view of

[0114] Figure 4 A top view of the cover plate body when the air guide groove is located on the cover plate body;

[0115] Figure 5 for Figure 4 A cross-sectional view of

[0116] Figure 6 A top view of the insulating member when the air guide groove is located on the side of the insulating member facing the lead-out terminal;

[0117] Figure 7 for Figure 6 A cross-sectional view of

[0118] Figure 8 A top view of the insulating member when the air guide groove is located on the side of the insulating member facing the cover plate body;

[0119] Fig. 9 for Figure 8 A cross-sectional view of

[0120] Fig.10 is a schematic diagram of the structure of the air guide groove;

[0121] Fig.11 is a cross-sectional view of an embodiment of the air guide groove;

[0122] Fig.12 is a cross-sectional view of another embodiment of the air guide groove;

[0123] Fig.13 The figure is a cross-sectional view of another embodiment of the air guide groove.

[0124] Description of reference numerals:

[0125] 100 cover plate assembly;

[0126] 1 Lead terminal;

[0127] 2 Insulation parts;

[0128] 3 cover plate body, 31 injection hole;

[0129] 4 poles;

[0130] 5. Seals;

[0131] 6 Spacer;

[0132] 7-pole hole;

[0133] 8, V1-V16 air guide groove, 81 first groove section, 82 second groove section, 83 third groove section, 84 fourth groove section;

[0134] 9 lead-out piece. DETAILED DESCRIPTION

[0135] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of this application.

[0136] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0137] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0138] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0139] In the related art, the cover assembly of the battery cannot detect the sealing state of the seal through helium inspection. To solve the above problem, this application proposes an electrical device, which can be a vehicle, a photovoltaic device, or a household energy storage device, and this application does not limit this. When the electrical device is a vehicle, the vehicle can be a new energy vehicle, a fuel vehicle, a car, a truck, or a forklift, and this application does not limit this.

[0140] The electrical equipment includes an equipment rack, electrical components and a battery pack. The equipment rack is used as a supporting frame of the electrical equipment to support and connect the various assemblies of the electrical equipment. The equipment rack is formed with a battery compartment, and the battery pack is arranged in the battery compartment. The battery pack is electrically connected to the electrical components, and the battery pack is used to store and transmit electrical energy to the electrical components to maintain the normal use of the electrical components. The electrical components are fixed on the equipment rack, and the electrical components can be lighting lamps, display screens, or processors, and this application does not limit this.

[0141] The battery pack is formed by connecting multiple batteries in parallel or in series. The battery includes a shell, a battery cell and a cover assembly. The shell serves as the supporting frame of the battery and is used to support and connect the various components of the battery. The shape of the shell can be rectangular, circular, or other regular or irregular shapes, which is not limited in this application. The shell is formed with a receiving cavity with an opening on one side. The battery cell is arranged in the receiving cavity. The battery cell is used to store and transmit electricity to the outside. The cover assembly covers the opening and is connected to the battery cell.

[0142] Please refer to Figure 1The cover assembly 100 includes a cover body 3, an insulating member 2, a lead terminal 1, a pole 4, a sealing member 5 and a lead sheet 9. The cover body 3 serves as the main body of the cover assembly 100 and is used to support and connect other components of the cover assembly 100. The cover body 3 covers the opening of the accommodating cavity. The lead terminal 1 is provided on the cover body 3, and the lead terminal 1 is connected between the battery cell and the external circuit so that the battery cell is connected to the electronic components provided in the external circuit. The insulating member 2 is provided between the lead terminal 1 and the cover body 3, and the insulating member 2 is used to block the current flow between the lead terminal 1 and the cover body 3 to avoid a short circuit in the battery. The lead terminal 1, the insulating member 2 and the cover body 3 are stacked along a first direction.

[0143] The cover assembly 100 is provided with a pole hole 7, which passes through the cover body 3 and the insulating member 2. One end of the pole 4 is connected to the pole ear of the battery cell through the lead-out sheet 9, and the other end passes through the pole hole 7 to be connected to the lead-out terminal 1. There is a gap between the pole 4 and the pole hole 7, and the seal 5 is arranged in the gap. The seal 5 is used to form a seal in the gap, thereby isolating the internal space and the external space of the battery from each other, thereby improving the stability of the battery operation. In other possible implementations of the present application, the cover assembly 100 also includes a spacer 6, which is arranged between the lead-out sheet 9 and the cover body 3. The spacer 6 is used to form insulation between the lead-out sheet 9 and the cover body 3 to avoid excessive current in the lead-out sheet 9, which causes breakdown of the air between the lead-out sheet 9 and the cover body 3.

[0144] After the assembly of the cover assembly 100 is completed, a helium inspection is required. The helium inspection refers to fixing the cover assembly 100 in a specific tooling. The tooling is provided with a helium chamber with an opening on one side, and the cover assembly 100 is covered on the opening of the helium chamber. At the beginning of the inspection, a certain pressure of helium will be introduced into the helium chamber of the tooling, and the atmosphere around the cover assembly 100 will be inspected. Under ideal conditions, when the seal 5 of the cover assembly 100 is missing or the seal fails, the helium in the helium chamber will pass through the gap between the pole 4 and the pole hole 7, enter the cover assembly 100, and leak to the outside atmosphere through the assembly gap between the cover body 3, the insulating part 2 and the lead terminal 1, and be captured by the helium detection device provided around the cover assembly. The helium detection device that captures the helium will sound an alarm to remind the inspector that the seal of the cover assembly 100 has failed. However, in actual operation, due to the small assembly gap between the cover body 3, the insulating member 2 and the lead terminal 1, after the helium reaches the gap, it cannot leak into the atmosphere through the assembly gap between the cover body 3, the insulating member 2 and the lead terminal 1, which causes the helium detection device to misjudge the sealing structure of the cover assembly 100, thereby affecting the safety performance of the battery.

[0145] To solve the above problems, the present application proposes a cover plate assembly 100, which includes a lead terminal 1, an insulating member 2, a cover plate body 3, a pole and a seal 5, and the lead terminal 1, the insulating member 2 and the cover plate body 3 are stacked along a first direction.

[0146] Please refer to Figures 2 to 10 The cover plate assembly 100 is provided with a pole hole, which passes through the insulating member 2 and the cover plate body 3 in sequence; the pole passes through the pole hole to be connected with the lead-out terminal 1, and there is a gap between the pole and the pole hole; the sealing member 5 is provided in the gap, and the sealing member 5 is used to seal the gap; at least one of the lead-out terminal 1, the insulating member 2 and the cover plate body 3 is provided with an air guide surface, and an air guide groove 8 is provided on the air guide surface, one end of the air guide groove 8 is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove 8 satisfies the relationship: 0<S2 / S1≤0.5; wherein S1 is the area of ​​the air guide surface, S2 is the total surface area of ​​the air guide groove 8, and S2 / S1 is the ratio of the total surface area of ​​the air guide groove 8 to the area of ​​the air guide surface.

[0147] It should be noted that the air guide surface refers to the surface of the lead-out terminal 1, the insulating member 2 and the cover body 3 for providing the air guide groove 8. For details, please refer to Figure 2 For the lead terminal 1, since the air guide groove 8 is provided on the a surface of the lead terminal 1, the a surface is the air guide surface of the lead terminal 1, and S1 is the area of ​​the a surface. Since the air guide surface is provided with four air guide grooves, namely, the air guide groove V1, the air guide groove V2, the air guide groove V3 and the air guide groove V4, S2 is the total area of ​​the four air guide grooves, namely, the air guide groove V1, the air guide groove V2, the air guide groove V3 and the air guide groove V4. It can be understood that in other possible implementation modes of the present application, the air guide surface may be provided with only two air guide grooves, namely, the air guide groove V1 and the air guide groove V2, or only one air guide groove, namely, the air guide groove V1. At this time, S2 is the sum of the areas of the air guide grooves V1 and V2, or the area of ​​V1.

[0148] Please refer to Figure 4 For the cover body 3, the cover body 3 has a b surface and a c surface, and the air guide groove 8 is opened on the b surface. Therefore, the b surface is the air guide surface of the cover body 3, S1 is the area of ​​the b surface, and S2 is the total area of ​​the four air guide grooves 8, namely, the air guide groove V5, the air guide groove V6, the air guide groove V7 and the air guide groove V8.

[0149] Please refer to Fig.10For the insulating member 2, the insulating member 2 has six faces, among which ei is provided with an air guide groove 8, and the air guide face of the insulating member 2 is the ei face, and the e face is provided with an air guide groove V9, so for the e face, S1 is the area of ​​the e face, and S2 is the area of ​​the air guide groove V9. The f face is provided with air guide grooves V10-V13, so for the f face, S1 is the area of ​​the f face, S2 is the total area of ​​the air guide grooves V10, V11, V12 and V13, and the gi face is the same as the e face.

[0150] The technical solution of the present application is to provide an air guide groove 8 on at least one of the lead-out terminal 1, the insulating member 2 and the cover body 3, and to connect the gap between the pole and the pole hole and the external atmosphere through the air guide groove 8. When the seal 5 is missing or the seal 5 fails, the helium in the helium detection process can leak into the external atmosphere through the air guide groove 8. When the detection device detects helium in the external atmosphere, it can be determined that the seal 5 fails or the seal 5 is missing, so as to improve the accuracy of the helium detection. At the same time, the present application limits the size of the air guide groove 8 and the air guide surface where it is located to minimize the influence of the opening of the air guide groove 8 on the strength of the lead-out terminal 1, the insulating member 2 or the cover body 3, while improving the accuracy of the helium detection, ensuring the strength of the cover assembly 100. Reduce the possibility of the cover assembly 100 without a seal 5 or a seal 5 failure to enter the next process through the helium detection, improve the safety performance of the battery, improve the production efficiency, and reduce the production cost.

[0151] Please refer to Figure 2 and Figure 3 , the air guide surface can be provided on the lead terminal 1, the insulating member 2, or the cover plate body 3. In one embodiment of the present application, the air guide surface is provided on the side of the lead terminal 1 facing the insulating member 2, and the air guide groove 8 satisfies at least one of the following relationships: 0<L1 / H1≤0.5, 0<W1*H1 / W2*L1≤0.5, wherein H1 is the distance from the air guide surface to the side of the lead terminal 1 away from the insulating member 2. Since the air guide surface is provided on the surface of the lead terminal 1, H1 is the thickness of the lead terminal 1. L1 is the maximum depth of the air guide groove 8. The maximum depth of the air guide groove 8 refers to the farthest distance from the notch of the air guide groove 8 to the bottom of the groove. When the bottom of the air guide groove 8 is a horizontal straight line, the maximum depth of the air guide groove 8 is the distance from the notch of the air guide groove 8 to the bottom of the groove. When the bottom of the air guide groove 8 is an arc or a broken line, the maximum depth of the air guide groove 8 is the distance from the notch of the air guide groove 8 to the lowest point of the bottom of the groove.

[0152] W1 is the maximum width of the air guide groove 8, and the width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the lead terminal 1, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 extends along the width direction of the lead terminal 1, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the lead terminal 1. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the lead terminal 1. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the lead terminal 1. W2 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the lead terminal 1, W2 is the length of the air guide surface in the width direction of the lead terminal 1. When the air guide groove 8 extends along the width direction of the lead terminal 1, W2 is the length of the air guide surface in the length direction of the lead terminal 1.

[0153] L1 / H1 is the ratio of the maximum depth of the air guide groove 8 to the distance from the air guide surface to the side of the lead-out terminal 1 away from the insulating part 2. W1*H1 is the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the lead-out terminal 1, and W2*L1 is the cross-sectional area of ​​the lead-out terminal 1 used to set the air guide surface, in the length direction or width direction of the lead-out terminal 1. W1*H1 / W2*L1 is the ratio of the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the lead-out terminal 1 to the cross-sectional area of ​​the lead-out terminal 1 used to set the air guide surface, in the length direction or width direction of the lead-out terminal 1. Under this size limitation, the influence of the air guide groove 8 on the strength of the cover assembly 100 can be minimized, thereby improving the accuracy of the sealing detection of the cover assembly 100 and ensuring the service life of the cover assembly 100.

[0154] Please refer to Figure 4 , Figure 5 and Fig.10 In one possible implementation mode of the present application, the air guide surface may also be provided on the side of the insulating member 2 facing the lead terminal 1, and the air guide groove 8 satisfies at least one of the following relationships: 0<L2 / H2≤0.5, 0<W3*H2 / W4*L2≤0.5; wherein H2 is the distance from the air guide surface to the side of the insulating member 2 away from the lead terminal 1, please refer to Fig.10, when the air-guiding surface is f, H2 is the distance from the f surface to the j surface, wherein the f surface and the j surface are two opposite surfaces in the first direction. When the air-guiding surface is the e surface, H2 is the distance from the e surface to the k surface, wherein the e surface and the k surface are two opposite surfaces in the second direction. When the air-guiding surface is set to the g surface-i surface, it is the same as the e surface. L2 is the maximum depth of the air-guiding groove 8. The maximum depth of the air-guiding groove 8 refers to the farthest distance between the notch and the bottom of the air-guiding groove 8 in the first direction. When the bottom of the air-guiding groove 8 is a horizontal straight line, the maximum depth of the air-guiding groove 8 is the distance from the notch to the bottom of the air-guiding groove 8. When the bottom of the air-guiding groove 8 is an arc or a broken line, the maximum depth of the air-guiding groove 8 is the distance from the notch to the lowest point of the bottom of the air-guiding groove 8.

[0155] W3 is the maximum width of the air guide groove 8, and the width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the insulating member 2, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the insulating member 2, and when the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the insulating member 2. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the insulating member 2. When the air guide groove 8 extends along the width direction of the insulating member 2, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the insulating member 2. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the insulating member 2. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the insulating member 2. W4 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the insulating member 2, W4 is the length of the air guide surface in the width direction of the insulating member 2. When the air guide groove 8 extends along the width direction of the insulating member 2, W4 is the length of the air guide surface in the length direction of the insulating member 2.

[0156] L2 / H2 is the ratio of the maximum depth of the air guide groove 8 to the distance from the air guide surface to the side of the insulating part 2 away from the insulating part 2. W3*H2 is the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the insulating part 2, and W4*L2 is the cross-sectional area of ​​the insulating part 2 used to set the air guide surface, in the length direction or width direction of the insulating part 2. W3*H2 / W4*L2 is the ratio of the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the insulating part 2 to the cross-sectional area of ​​the insulating part 2 used to set the air guide surface, in the length direction or width direction of the insulating part 2. Under this size limitation, the influence of the air guide groove 8 on the strength of the insulating part 2 can be minimized, thereby improving the accuracy of the sealing detection of the cover plate assembly 100 and ensuring the service life of the cover plate assembly 100.

[0157] Please refer to Figure 6 and Figure 7 , the air guide surface is arranged on the side of the insulating member 2 facing the cover body 3, and the air guide groove 8 satisfies at least one of the following relationships: 0<L3 / H3≤0.5, 0<W5*H3 / W6*L3≤0.5; wherein H3 is the distance from the air guide surface to the side of the insulating member 2 away from the cover body 3. L3 is the maximum depth of the air guide groove 8. The maximum depth of the air guide groove 8 refers to the farthest distance between the notch and the bottom of the air guide groove 8 in the first direction. When the bottom of the air guide groove 8 is a horizontal straight line, the maximum depth of the air guide groove 8 is the distance from the notch to the bottom of the air guide groove 8. When the bottom of the air guide groove 8 is an arc or a broken line, the maximum depth of the air guide groove 8 is the distance from the notch to the lowest point of the bottom of the air guide groove 8.

[0158] W5 is the maximum width of the air guide groove 8. The width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the insulating member 2, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the insulating member 2. When the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the insulating member 2. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the insulating member 2. When the air guide groove 8 extends along the width direction of the insulating member 2, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the insulating member 2. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the insulating member 2. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the insulating member 2. W6 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the insulating member 2, W6 is the length of the air guide surface in the width direction of the insulating member 2. When the air guide groove 8 extends along the width direction of the insulating member 2, W6 is the length of the air guide surface in the length direction of the insulating member 2.

[0159] L3 / H3 is the ratio of the maximum depth of the air guide groove 8 to the distance from the air guide surface to the side of the insulating part 2 away from the insulating part 2. W5*H3 is the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the insulating part 2, and W6*L3 is the cross-sectional area of ​​the insulating part 2 used to set the air guide surface, in the length direction or width direction of the insulating part 2. W5*H3 / W6*L3 is the ratio of the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the insulating part 2 to the cross-sectional area of ​​the insulating part 2 used to set the air guide surface, in the length direction or width direction of the insulating part 2. Under this size limitation, the influence of the air guide groove 8 on the strength of the insulating part 2 can be minimized, thereby improving the accuracy of the sealing detection of the cover plate assembly 100 and ensuring the service life of the cover plate assembly 100.

[0160] Please refer to Figure 8 and Fig. 9 , the air guide surface is arranged on the side of the cover plate body 3 facing the insulating member 2, and the air guide groove 8 satisfies at least one of the following relationships: 0<L4 / H4≤0.5, 0<W7*H4 / W8*L4≤0.5; wherein H4 is the distance from the air guide surface to the side of the cover plate body 3 away from the insulating member 2. In this embodiment, the cover plate body 3 is provided with a positioning groove for providing positioning for the insulating member 2, and the air guide surface is arranged on the bottom surface of the positioning groove. Therefore, H4 should be the distance from the bottom of the positioning groove to the side of the cover plate body 3 away from the insulating member 2. L4 is the maximum depth of the air guide groove 8. The maximum depth of the air guide groove 8 refers to the farthest distance between the notch and the bottom of the air guide groove 8 in the first direction. When the bottom of the air guide groove 8 is a horizontal straight line, the maximum depth of the air guide groove 8 is the distance from the notch to the bottom of the air guide groove 8. When the bottom of the air guide groove 8 is an arc or a broken line, the maximum depth of the air guide groove 8 is the distance from the notch to the lowest point of the bottom of the air guide groove 8.

[0161] W7 is the maximum width of the air guide groove 8, and the width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the cover plate body 3, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the cover plate body 3. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the cover plate body 3. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the cover plate body 3. W7 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the cover plate body 3, W7 is the length of the air guide surface in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, W7 is the length of the air guide surface in the length direction of the cover plate body 3. W8 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the cover plate body 3, W8 is the length of the air guide surface in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, W8 is the length of the air guide surface in the length direction of the cover plate body 3.

[0162] In other possible implementations of the present application, the cover body 3 may also include a lead-out terminal 1, an insulating member 2, a cover body 3, a pole and a sealing member 5, wherein the lead-out terminal 1, the insulating member 2 and the cover body 3 are stacked along a first direction; the cover assembly 100 is provided with a pole hole 7, which passes through the insulating member 2 and the cover body 3 in sequence; the pole passes through the pole hole 7 to be connected to the lead-out terminal 1, and there is a gap between the pole and the pole hole; the sealing member 5 is provided in the gap, and the sealing member 5 is used to seal the gap; at least one of the lead-out terminal 1 or the cover body 3 is provided with an air guide groove 8, one end of the air guide groove 8 is connected to the gap, and the other end is used to be connected to the external atmosphere.

[0163] The technical solution of the present application arranges the air guide groove 8 on the lead-out terminal 1 or the cover body 3 with higher material strength, thereby reducing the impact of the air guide groove 8 on the cover assembly 100, improving the strength of the cover assembly 100, and extending the service life of the cover assembly 100.

[0164] In the above cover plate structure, the air guide surface can be provided on the cover plate body 3 or on the lead-out terminal 1. Please refer to Figure 2 and Figure 3 In one possible implementation mode of the present application, the air guide surface is arranged on the side of the lead terminal 1 facing the insulating member 2, and the air guide groove 8 satisfies at least one of the following relationships: 0<L5 / H5≤0.5, 0<W8*H5 / W9*L5≤0.5. Among them, H5 is the distance from the air guide surface to the side of the lead terminal 1 away from the insulating member 2. Since the air guide surface is arranged on the surface of the lead terminal 1, H5 is the thickness of the lead terminal 1. L5 is the maximum depth of the air guide groove 8. The maximum depth of the air guide groove 8 refers to the farthest distance from the notch of the air guide groove 8 to the bottom of the groove. When the bottom of the air guide groove 8 is a horizontal straight line, the maximum depth of the air guide groove 8 is the distance from the notch of the air guide groove 8 to the bottom of the groove. When the bottom of the air guide groove 8 is an arc or a broken line, the maximum depth of the air guide groove 8 is the distance from the notch of the air guide groove 8 to the lowest point of the bottom of the groove.

[0165] W8 is the maximum width of the air guide groove 8, and the width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the lead terminal 1, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the lead terminal 1. When the air guide groove 8 extends along the width direction of the lead terminal 1, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the lead terminal 1. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the lead terminal 1. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the lead terminal 1. W9 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the lead terminal 1, W9 is the length of the air guide surface in the width direction of the lead terminal 1. When the air guide groove 8 extends along the width direction of the lead terminal 1, W9 is the length of the air guide surface in the length direction of the lead terminal 1.

[0166] L5 / H5 is the ratio of the maximum depth of the air guide groove 8 to the distance from the air guide surface to the side of the lead-out terminal 1 away from the insulating part 2. W8*H5 is the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the lead-out terminal 1, and W9*L5 is the cross-sectional area of ​​the lead-out terminal 1 used to set the air guide surface portion, in the length direction or width direction of the lead-out terminal 1. W8*H5 / W9*L5 is the ratio of the cross-sectional area of ​​the air guide groove 8 in the length direction or width direction of the lead-out terminal 1 to the cross-sectional area of ​​the lead-out terminal 1 used to set the air guide surface portion, in the length direction or width direction of the lead-out terminal 1. Under this size limitation, the influence of the air guide groove 8 on the strength of the cover assembly 100 can be minimized, thereby improving the accuracy of the sealing detection of the cover assembly 100 and ensuring the service life of the cover assembly 100.

[0167] Please refer to Figure 4 and Figure 5In other possible implementation modes of the present application, the air guide surface is arranged on the side of the cover body 3 facing the insulating part 2, and the air guide groove 8 satisfies at least one of the following relationships: 0<L6 / H6≤0.5, 0<W10*H6 / W11*L6≤0.5; wherein, H6 is the distance from the air guide surface to the side of the cover body 3 away from the insulating part 2. In the present implementation mode, a positioning groove for providing positioning for the insulating part 2 is provided on the cover body 3, and the air guide surface is arranged on the bottom surface of the positioning groove. Therefore, H6 should be the distance from the bottom of the positioning groove to the side of the cover body 3 away from the insulating part 2. L6 is the maximum depth of the air guide groove 8. The maximum depth of the air guide groove 8 refers to the farthest distance between the slot opening and the bottom of the air guide groove 8 in the first direction. When the bottom of the air guide groove 8 is a horizontal straight line, the maximum depth of the air guide groove 8 is the distance from the slot opening to the bottom of the air guide groove 8. When the bottom of the air guide groove 8 is an arc or a broken line, the maximum depth of the air guide groove 8 is the distance from the slot opening to the lowest point of the bottom of the air guide groove 8.

[0168] W10 is the maximum width of the air guide groove 8, and the width of the air guide groove 8 refers to the length of the air guide groove 8 in the direction perpendicular to its extension direction. Specifically, when the air guide groove 8 extends along the length direction of the cover plate body 3, the width of the air guide groove 8 is the length of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 is a regular rectangle, the maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, the width of the air guide groove 8 is the length of the air guide groove 8 in the length direction of the cover plate body 3. The maximum width of the air guide groove 8 is the distance between the two side walls of the air guide groove 8 in the length direction of the cover plate body 3. When the air guide groove 8 is an irregular shape, the maximum width of the air guide groove 8 is the maximum distance between the two side walls of the air guide groove 8 in the length direction of the cover plate body 3. W10 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the cover plate body 3, W10 is the length of the air guide surface in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, W10 is the length of the air guide surface in the length direction of the cover plate body 3. W11 is the length of the air guide surface in the width direction of the air guide groove 8. When the air guide groove 8 extends along the length direction of the cover plate body 3, W11 is the length of the air guide surface in the width direction of the cover plate body 3. When the air guide groove 8 extends along the width direction of the cover plate body 3, W11 is the length of the air guide surface in the length direction of the cover plate body 3.

[0169] Please refer to Fig.10The air guide groove 8 includes a first groove section 81 extending along a third direction and a second groove section 82 extending along a second direction. One end of the first groove section 81 is connected to the gap, and the other end extends to the outer edge of the lead-out terminal 1, the insulating member 2 or the cover body 3, so as to guide the helium in the gap to the external atmosphere along the third direction. One end of the second groove section 82 is connected to the gap, and the other end extends to the outer edge of the lead-out terminal 1, the insulating member 2 or the cover body 3, so as to guide the helium in the gap to the external atmosphere along the second direction. The second direction, the third direction and the first direction are three directions perpendicular to each other. Providing two air guide grooves 8 extending in different directions can more quickly lead the helium outward, thereby improving the detection speed of the helium detection.

[0170] It can be understood that if the air guide groove 8 is provided in a groove structure that is recessed inward, the air guide groove 8 should also include a third groove section 83 and a fourth groove section 84 arranged along the first direction, one end of the third groove section 83 is connected to the first groove section 81, and the other end extends to the groove opening of the groove structure, so as to guide the helium in the first groove section 81 from the groove opening to the external atmosphere. One end of the fourth groove section 84 is connected to the second groove section 82, and the other end extends to the groove opening of the groove structure, so as to guide the helium in the first groove section 81 from the groove opening to the external atmosphere.

[0171] Please refer to Figure 1 and Fig.10 The cover plate body 3 is provided with an injection hole 31, through which the electrolyte can be injected into the accommodating cavity of the shell. However, during the injection process, the battery may overflow from the cover plate assembly 100 through the injection hole 31. The overflowed electrolyte may enter the gap through the air guide groove 8, and then corrode the seal 5. To solve the above problems, in one embodiment of the present application, the first groove section 81 includes a plurality of curved sections, and the plurality of curved sections are connected along a third direction. The plurality of curved sections can extend the path of the first groove section 81, thereby reducing the possibility of the electrolyte entering the gap through the air guide groove 8 and reducing the risk of the electrolyte corroding the seal 5.

[0172] Please refer to Figures 11 to 13 The cross-sectional shape of the first slot segment 81 perpendicular to the third direction may be a rectangle, a semicircle, or a broken line "V", and the present application does not limit this. In one embodiment of the present application, the cross-sectional shape of the first slot segment 81 perpendicular to the third direction is a semicircle, so as to reduce the processing stress of the first slot segment 81, reduce the possibility of the first slot segment 81 being processed and cracked, and improve the yield rate of the cover plate assembly 100.

[0173] The cross-sectional shape of the second slot segment 82 perpendicular to the second direction may be a rectangle, a semicircle, or a broken line "V", and the present application does not limit this. In one embodiment of the present application, the cross-sectional shape of the second slot segment 82 perpendicular to the second direction is a semicircle, so as to reduce the processing stress of the second slot segment 82, reduce the possibility of cracking of the second slot segment 82 during processing, and improve the yield rate of the cover plate assembly 100.

[0174] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0175] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A cover plate assembly, characterized in that: It comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction; The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body; The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole; The sealing member is arranged in the gap, and the sealing member is used to seal the gap; At least one of the lead terminal, the insulating member and the cover plate body is provided with an air guide surface, and an air guide groove is provided on the air guide surface, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere, and the air guide groove satisfies the relationship: 0<S2 / S1≤0.5; Wherein, S1 is the area of ​​the air guiding surface where the air guiding groove is located; S2 is the sum of the surface areas of all the air guiding grooves on the air guiding surface where the air guiding grooves are located.

2. The cover plate assembly according to claim 1, characterized in that: The air guide surface is provided on the side of the lead terminal facing the insulating member, and the air guide groove satisfies at least one of the following relationships: 0<L1 / H1≤0.5, 0<W1*H1 / W2*L1≤0.5; Wherein, H1 is the distance from the air guide surface to the side of the lead terminal away from the insulating member; L1 is the maximum depth of the air guide groove; W1 is the maximum width of the air guide groove; W2 is the length of the air guide surface in the width direction of the air guide groove.

3. The cover plate assembly according to claim 1, characterized in that: The air guide surface is provided on the side of the insulating member facing the lead-out terminal, and the air guide groove satisfies at least one of the following relationships: 0<L2 / H2≤0.5, 0<W3*H2 / W4*L2≤0.5; Wherein, H2 is the distance from the air guide surface to the side of the insulating member away from the lead-out terminal; L2 is the maximum depth of the air guide groove; W3 the maximum width of the air guide groove; W4 is the length of the air guide surface in the width direction of the air guide groove.

4. The cover plate assembly according to claim 1, characterized in that: The air guide surface is provided on the side of the insulating member facing the cover plate body, and the air guide groove satisfies at least one of the following relationships: 0<L3 / H3≤0.5, 0<W5*H3 / W6*L3≤0.5; Wherein, H3 is the distance from the air guide surface to the side of the insulating member away from the cover plate body; L3 is the maximum depth of the air guide groove; W5 is the maximum width of the air guide groove; W6 is the length of the air guiding surface in the width direction of the air guiding groove.

5. The cover plate assembly according to claim 1, wherein: The air guide surface is provided on the side of the cover plate body facing the insulating member, and the air guide groove satisfies at least one of the following relationships: 0<L4 / H4≤0.5, 0<W7*H4 / W8*L4≤0.5; Wherein, H4 is the distance from the air guide surface to the side of the cover plate body facing away from the insulating member; L4 is the maximum depth of the air guide groove; W7 is the maximum width of the air guide groove; W8 is the length of the air guide surface in the width direction of the air guide groove.

6. The cover plate assembly according to any one of claims 1 to 5, characterized in that: The air guide groove comprises a first groove section extending along a third direction and a second groove section extending along a second direction; The second direction, the third direction and the first direction are three directions perpendicular to each other.

7. The cover plate assembly according to claim 6, characterized in that: The first slot segment includes a plurality of curved segments, and the plurality of curved segments are connected along the third direction.

8. The cover plate assembly according to claim 6, characterized in that: The cross-sectional shape of the first groove segment perpendicular to the third direction includes one of a rectangular shape, a semicircular shape, and a broken line shape; A cross-sectional shape of the second slot segment perpendicular to the second direction includes a rectangular shape, a semicircular shape, and a broken line shape.

9. The cover plate assembly according to claim 6, characterized in that: The insulating member comprises a bottom wall and a side wall arranged around the bottom wall, wherein the bottom wall and the side wall are arranged to form a mounting cavity, the mounting cavity is used to accommodate the lead terminal, and the mounting cavity has an opening; The first groove section and the second groove section are arranged on a side of the bottom wall facing the installation cavity; The air guide groove further includes a third groove section and a fourth groove section, wherein the third groove section is arranged on the side of the side wall facing the installation cavity, one end of the third groove section is connected to the first groove section, and the other end extends toward the opening; The fourth slot section is arranged on a side of the side wall facing the installation cavity, one end of the fourth slot section is connected to the second slot section, and the other end of the fourth slot section extends toward the opening.

10. A cover plate assembly, characterized in that: The cover plate assembly comprises a lead terminal, an insulating member, a cover plate body, a pole and a sealing member, wherein the lead terminal, the insulating member and the cover plate body are stacked along a first direction; The cover plate assembly is provided with a pole hole, and the pole hole sequentially passes through the insulating member and the cover plate body; The pole passes through the pole hole to be connected with the lead-out terminal, and there is a gap between the pole and the pole hole; The sealing member is arranged in the gap, and the sealing member is used to seal the gap; At least one of the lead terminal or the cover plate body is provided with an air guide surface, and the air guide surface is provided with an air guide groove, one end of the air guide groove is connected to the gap, and the other end is used to be connected to the external atmosphere.

11. The cover plate assembly according to claim 10, characterized in that: The air guide surface is provided on the side of the lead terminal facing the insulating member, and the air guide groove satisfies at least one of the following relationships: 0<L5 / H5≤0.5, 0<W8*H5 / W9*L5≤0.5; Wherein, H5 is the distance from the air guide surface to the side of the lead terminal away from the insulating member; L5 is the maximum depth of the air guide groove; W8 is the maximum width of the air guide groove; W9 is the length of the air guide surface in the width direction of the air guide groove.

12. The cover plate assembly according to claim 10, wherein: The air guide surface is provided on the side of the cover plate body facing the insulating member, and the air guide groove satisfies at least one of the following relationships: 0<L6 / H6≤0.5, 0<W10*H6 / W11*L6≤0.5; Wherein, H6 is the distance from the air guide surface to the side of the cover plate body facing away from the insulating member; L6 is the maximum depth of the air guide groove; W10 is the maximum width of the air guide groove; W11 is the length of the air guide surface in the width direction of the air guide groove.

13. A battery, characterized in that: include: case; The cover plate assembly according to any one of claims 1 to 9, or the cover plate assembly according to any one of claims 10 to 12, wherein the cover plate assembly is arranged on the shell, and the cover plate assembly and the shell are surrounded to form a receiving space; A pole core is accommodated in the accommodation space.

14. A battery pack, characterized in that: Comprising the battery of claim 13.

15. An electrical equipment, characterized in that: Comprising the battery as claimed in claim 13 or the battery pack as claimed in claim 14.

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