End cover assembly, battery and electric equipment

Abstract

The embodiment of the utility model provides an end cover assembly, a battery and electric equipment. The end cover assembly comprises a first leading-out sheet and a second leading-out sheet, and the first leading-out sheet extends along a first direction; the first lead-out sheet comprises a first pole hole penetrating along a second direction, and the first lead-out sheet is connected with the pole through the first pole hole; the second lead-out sheet is connected with the first lead-out sheet, and the second lead-out sheet extends along a second direction; wherein the first direction and the second direction are two intersecting directions; through the arrangement of the first lead-out sheet and the second lead-out sheet, after the end cover assembly is connected with the shell, the mounting space required by the tabs in the battery shell can be effectively reduced, and the energy density of the battery is further remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to an end cover assembly, a battery and an electrical device. Background Art

[0002] During the assembly of a battery, the tab is usually first connected to the lead-out piece on the cover plate, and then the cover plate is connected to the housing. However, in the prior art, the tab inside the battery housing needs to be folded to be coplanar with the pole column, resulting in a relatively long length of the tab, and the relatively long tab occupies a large installation space, seriously reducing the energy density of the battery.

[0003] Therefore, a new technical solution is needed to solve the above technical problems. Summary of the Utility Model

[0004] An object of the utility model is to provide a new technical solution for an end cover assembly, a battery and an electrical device.

[0005] According to a first aspect of the utility model, an end cover assembly is provided, wherein the end cover assembly comprises:

[0006] A first lead-out piece extending along a first direction; the first lead-out piece comprises a first pole column hole penetrating along a second direction, and the first lead-out piece is connected to the pole column through the first pole column hole;

[0007] A second lead-out piece connected to the first lead-out piece and extending along the second direction;

[0008] wherein the first direction and the second direction are two intersecting directions.

[0009] Optionally, the second lead-out piece comprises a first connection part and a second connection part, the first connection part is connected to the first lead-out piece, and the second connection part is connected to the tab.

[0010] Optionally, the first lead-out piece comprises a first side and a second side, and the distance between the second lead-out piece and the first side is equal to the distance between the second lead-out piece and the second side.

[0011] Optionally, the end cover assembly further comprises a third lead-out piece extending along the first direction;

[0012] wherein the second lead-out piece is arranged between the first lead-out piece and the third lead-out piece.

[0013] Optionally, the end cover assembly further comprises a connecting piece, and the second lead-out piece is connected to the tab through the connecting piece.

[0014] Optionally, the second lead-out piece includes a first sub-lead-out piece, a second sub-lead-out piece, and an avoidance hole, and the avoidance hole is arranged between the first sub-lead-out piece and the second sub-lead-out piece.

[0015] Optionally, the first lead-out piece and the second lead-out piece form an integral structure.

[0016] Optionally, the end cover assembly further includes a cover plate and a cap, and the cover plate is arranged between the first lead-out piece and the cap;

[0017] The cover plate includes a second pole hole and a first hole that penetrate along the second direction. The cover plate is connected to the pole through the second pole hole, and the first hole is for the second lead-out piece to pass through.

[0018] Optionally, the size of the second lead-out piece along the first direction is smaller than the size of the first hole along the first direction.

[0019] Optionally, the end cover assembly further includes an insulating plate, and the insulating plate is arranged on a side of the first lead-out piece close to the cover plate;

[0020] The insulating plate includes a third pole hole and a second hole that penetrate along the second direction. The insulating plate is connected to the pole through the third pole hole, and the second hole is for the second lead-out piece to pass through.

[0021] According to a second aspect of the present invention, there is provided a battery, including a pole core, a housing, and the end cover assembly according to any one of the first aspects, and the housing is used for installing the pole core and the end cover assembly.

[0022] Optionally, the battery further includes a pole tab, one end of the pole tab is connected to the second lead-out piece, and the other end of the pole tab is connected to the pole core.

[0023] According to a third aspect of the present invention, there is provided an electrical device, including the battery according to any one of the second aspects.

[0024] According to the end cover assembly provided by the embodiment of the present invention, the end cover assembly includes a first lead-out piece and a second lead-out piece. The first lead-out piece extends along a first direction; the second lead-out piece is connected to the first lead-out piece and extends along a second direction; wherein, the first direction and the second direction are two intersecting directions; through the arrangement of the first lead-out piece and the second lead-out piece, after the end cover assembly is connected to the housing, the installation space required for the pole tab in the battery housing can be effectively reduced, and thus the energy density of the battery is significantly improved.

[0025] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated in and forming a part of this specification illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0027] Figure 1 is an exploded view of the end cap assembly in an embodiment of the present invention Figure 1 .

[0028] Figure 2 is a structural schematic diagram of the first lead piece and the second lead piece in an embodiment of the present invention Figure 1 .

[0029] Figure 3 is Figure 1 's assembly drawing.

[0030] Figure 4 is a top view of the cover plate in an embodiment of the present invention

[0031] Figure 5 is an exploded view of the end cap assembly in an embodiment of the present invention Figure 2 .

[0032] Figure 6 is an exploded view of the end cap assembly in an embodiment of the present invention Figure 3 .

[0033] Figure 7 is a structural schematic diagram of the first lead piece and the second lead piece in an embodiment of the present invention Figure 2 .

[0034] Figure 8 is a structural schematic diagram of the first lead piece and the second lead piece in an embodiment of the present invention Figure 3 .

[0035] Figure 9 is a structural schematic diagram of the connecting piece in an embodiment of the present invention

[0036] Figure 10 is an exploded view of the end cap assembly in an embodiment of the present invention Figure 4 .

[0037] Figure 11 is Figure 10 's assembly drawing.

[0038] Figure 12 is a structural schematic diagram of the first lead piece and the second lead piece in an embodiment of the present invention Figure 3 .

[0039] Figure 13It is a schematic structural diagram of a battery in an embodiment of the present utility model.

[0040] Figure 14 It is a schematic structural diagram of the first end of a battery in an embodiment of the present utility model.

[0041] Figure 15 It is a schematic structural diagram of the second end of a battery in an embodiment of the present utility model.

[0042] Figure 16 It is a schematic structural diagram of a tab in an embodiment of the present utility model.

[0043] Explanation of reference numerals:

[0044] 1. End cap assembly; 101. First lead-out piece; 1011. First pole hole; 1012. First side; 1013. Second side; 1014. First card slot; 102. Second lead-out piece; 1021. First connection part; 1022. Second connection part; 1023. First sub-lead-out piece; 1024. Second sub-lead-out piece; 1025. Avoidance hole; 103. Third lead-out piece; 1031. Second card slot; 104. Connection piece; 105. Explosion-proof valve; 106. Cover plate; 1061. Second pole hole; 1062. First hole; 1063. First liquid injection hole; 1064. First explosion-proof valve hole; 107. Cap; 108. Insulating plate; 1081. Third pole hole; 1082. Second hole; 1083. Second liquid injection hole; 1084. Second explosion-proof valve hole; 109. Pole; 110. Sealing part; 1101. Sealing cap; 1102. Sealing nail;

[0045] 2. Electrode core; 201. Tab; 2011. First tab; 2012. Second tab;

[0046] 3. Housing. Detailed implementation manners

[0047] Now, various exemplary embodiments of the present utility model will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments do not limit the scope of the present utility model.

[0048] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0049] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0050] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0052] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0053] According to an embodiment of this application, a end cap assembly 1 is provided. Referring to Figures 1 to 16 , the end cap assembly 1 includes a first lead piece 101 and a second lead piece 102. The first lead piece 101 extends along a first direction; the second lead piece 102 is connected to the first lead piece 101, and the second lead piece 102 extends along a second direction; wherein, the first direction and the second direction are two intersecting directions.

[0054] Specifically, in the embodiment of this application, the length direction of the end cap assembly 1 can be set as the X-axis direction, and the height direction of the end cap assembly 1 can be set as the Z-axis direction. Thus, as Figure 2As shown, by setting the first direction as the X-axis direction and the second direction as the Z-axis direction, after the first lead piece 101 is connected to the second lead piece 102, the included angle between the first lead piece 101 and the second lead piece 102 is a right angle, that is, the first lead piece 101 can be perpendicular to the second lead piece 102. In this way, compared with the prior art where the tab 201 in the battery housing needs to be folded to be coplanar with the pole column, the end cap assembly 1 in the embodiment of the present application can effectively reduce the installation space required for the tab 201 in the battery housing, thereby significantly improving the space utilization rate and energy density of the battery.

[0055] In addition, since the end cap assembly 1 in the embodiment of the present application can make the tab 201 not need to be folded in the battery housing, it also effectively avoids the problem of short circuit caused by the tab 201 contacting the electrode core 2 of the battery.

[0056] Among them, the included angle between the first lead piece 101 and the second lead piece 102 in the embodiment of the present application can also be an acute angle, and those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0057] In one embodiment, the first lead piece 101 includes a first pole column hole 1011 penetrating along the second direction, and the first lead piece 101 is connected to the pole column 109 through the first pole column hole 1011.

[0058] Specifically, as Figure 1 and Figure 2 shown, the first pole column hole 1011 in the embodiment of the present application can be an elliptical hole to better adapt to the elliptical-shaped pole column 109, and can also effectively ensure the stability and reliability of the connection between the first lead piece 101 and the pole column 109.

[0059] Of course, the first pole column hole 1011 in the embodiment of the present application can also be circular or square, etc., to better adapt to pole columns 109 of different shapes, and those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0060] Among them, the pole column 109 in the embodiment of the present application can be connected and fixed to the first pole column hole 1011 by laser welding or gluing.

[0061] In addition, the material of the pole column 109 in the embodiment of the present application can include at least one of epoxy resin, plastic, metal, or ceramic, and those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0062] In one embodiment, the second lead piece 102 includes a first connection portion 1021 and a second connection portion 1022. The first connection portion 1021 is connected to the first lead piece 101, and the second connection portion 1022 is connected to the tab 201.

[0063] Specifically, as Figure 2 shown, in the embodiment of the present application, the first connection portion 1021 is a triangular protrusion, and the second lead piece 102 is connected to the first lead piece 101 through the triangular protrusion, which can significantly enhance the connection strength and reliability between the first lead piece 101 and the second lead piece 102.

[0064] Of course, the first connection portion 1021 in the embodiment of the present application may also be in the shape of a rectangle, a circle, an I shape, a T shape, a Z shape, or a cross, etc. Those skilled in the art can choose according to actual needs, and the present application does not make specific limitations here.

[0065] In addition, the first connection portion 1021 and the first lead piece 101 in the embodiment of the present application may be an integral structure or a split structure.

[0066] Wherein, when the first connection portion 1021 and the first lead piece 101 are in a split structure, the connection between the first connection portion 1021 and the first lead piece 101 may be welding or gluing, etc. Those skilled in the art can choose according to actual needs, and the present application does not make specific limitations here.

[0067] In addition, the connection between the second connection portion 1022 and the tab 201 in the embodiment of the present application may be laser welding or ultrasonic welding, etc. Those skilled in the art can choose according to actual needs, and the present application does not make specific limitations here.

[0068] In one embodiment, the first lead piece 101 includes a first side 1012 and a second side 1013, and the distance between the second lead piece 102 and the first side 1012 is equal to the distance between the second lead piece 102 and the second side 1013.

[0069] Specifically, as Figure 7 shown, in the embodiment of the present application, the width direction of the end cap assembly 1 may also be set as the Y-axis direction, and the third direction is set as the Y-axis direction, so that the first direction, the second direction, and the third direction are perpendicular to each other, and the two sides of the first lead piece 101 along the third direction are the first side 1012 and the second side 1013 respectively.

[0070] Thus, by disposing the second lead piece 102 in the middle of the first lead piece 101 along the third direction, that is, making the distance between the second lead piece 102 and the first side 1012 equal to the distance between the second lead piece 102 and the second side 1013, it is possible to further reduce the problem that the ear 201 is likely to come into contact with the electrode core 2 and cause a short circuit after the first lead piece 101 is connected to the ear 201.

[0071] In addition, since the second lead piece 102 is disposed in the middle of the first lead piece 101 along the third direction, when connecting the second lead piece 102 to the ear 201, the ears 201 can also be disposed on both sides of the second lead piece 102 along the third direction to further reduce the problem of easy soldering failure when the second lead piece 102 is welded to the ear 201.

[0072] In one embodiment, the end cap assembly 1 further includes a third lead piece 103 that extends along the first direction; wherein, the second lead piece 102 is disposed between the first lead piece 101 and the third lead piece 103.

[0073] Specifically, as Figure 7 and Figure 12 shown, the lead pieces in the embodiments of the present application may include a first lead piece 101, a second lead piece 102, and a third lead piece 103. By disposing the second lead piece 102 between the first lead piece 101 and the third lead piece 103 in this way, the stability and reliability of the lead pieces can be effectively enhanced.

[0074] In one embodiment, the end cap assembly 1 further includes a connecting piece 104, and the second lead piece 102 is connected to the ear 201 through the connecting piece 104.

[0075] Specifically, as Figures 8 to 11 shown, the first lead piece 101 and the second lead piece 102 in the embodiments of the present application may be formed into a U-shaped structure so that the dimension of the second lead piece 102 along the second direction is shorter, thereby significantly improving the stability and reliability of the first lead piece 101 and the second lead piece 102.

[0076] Among them, as Figure 8 shown, there are two second lead pieces 102 in the embodiments of the present application, and the two second lead pieces 102 are disposed at both ends of the first lead piece 101 along the first direction.

[0077] In addition, as Figures 9 to 11As shown, the end cover assembly 1 described in the embodiment of the present application also includes a connecting piece 104, and the connecting piece 104 is in an L-shaped structure. The connecting piece 104 with the L-shaped structure can effectively connect the lead-out piece with the pole ear 201, and significantly ensure the stability and reliability of the connection between the lead-out piece and the pole ear 201.

[0078] In addition, the material of the connecting piece 104 described in the embodiment of the present application can be aluminum, copper or other materials. Those skilled in the art can choose according to actual needs, and the present application does not make any specific restrictions here.

[0079] In one embodiment, the second lead-out plate 102 includes a first sub-lead-out plate 1023 , a second sub-lead-out plate 1024 , and an avoidance hole 1025 , and the avoidance hole 1025 is disposed between the first sub-lead-out plate 1023 and the second sub-lead-out plate 1024 .

[0080] Specifically, Figure 12 As shown, in the embodiment of the present application, the avoidance hole 1025 is arranged between the first sub-lead-out sheet 1023 and the second sub-lead-out sheet 1024, so that when the battery is a multi-pole core 2 structure, the multiple pole ears 201 of the pole cores 2 can be welded to the first sub-lead-out sheet 1023 or the second sub-lead-out sheet 1024 along the second direction away from the avoidance hole 1025. In this way, it is effectively ensured that the pole ears 201 of the multiple pole cores 2 can be gathered in the middle position of the multiple pole cores 2, significantly reducing the number of layers of the multiple pole ears 201 connected to a single sub-lead-out sheet, and reducing the problem of cold welding when the pole ears 201 are welded to the second lead-out sheet 102.

[0081] In addition, the embodiment of the present application arranges the avoidance hole 1025 between the first sub-lead-out piece 1023 and the second sub-lead-out piece 1024, so that the avoidance hole 1025 can serve as an airflow channel for the gas generated during the electrochemical cycle. In this way, when thermal runaway occurs in the battery, the substances in the battery can be quickly discharged, thereby effectively extending the service life of the battery.

[0082] In addition, if Figure 12 As shown, in the embodiment of the present application, the first lead-out piece 101 also includes a first card slot 1014, and the third lead-out piece 103 also includes a second card slot 1031, so that when the lead-out piece is fixed, the hook arranged in the top spacer cooperates with the first card slot 1014 and the second card slot 1031, thereby effectively ensuring the reliability of the fixation of the lead-out piece.

[0083] In one embodiment, the first lead-out plate 101 and the second lead-out plate 102 form an integral structure.

[0084] Specifically, as shown in Figure 2 , Figure 8 and Figure 12 , in the embodiment of the present application, by setting the first lead piece 101 and the second lead piece 102 to form an integral structure, the reliability of the lead piece is effectively improved.

[0085] In addition, as shown in Figure 7 , the first lead piece 101 and the second lead piece 102 in the embodiment of the present application may also be a split structure.

[0086] Wherein, when the first lead piece 101 and the second lead piece 102 are in a split structure, the connection between the first lead piece 101 and the second lead piece 102 may be welding or gluing, etc., and those skilled in the art can select according to actual needs, and the present application does not make specific limitations here.

[0087] In one embodiment, the end cap assembly 1 further includes a cover plate 106 and a cap 107. The cover plate 106 is disposed between the first lead piece 101 and the cap 107; the cover plate 106 includes a second pole hole 1061 and a first hole 1062 that penetrate along the second direction. The cover plate 106 is connected to the pole 109 through the second pole hole 1061, and the first hole 1062 is used for the second lead piece 102 to pass through.

[0088] Specifically, as shown in Figure 1 , Figure 5 , Figure 6 and Figure 10 , the material of the cover plate 106 in the embodiment of the present application may be aluminum, copper or copper-aluminum composite material, etc., and the material of the cap 107 may be aluminum. The cap 107 can be fixed to the periphery of the first hole 1062 of the cover plate 106 by laser welding to protect the second lead piece 102. The pole 109 can be fixed to the second pole hole 1061 by laser welding or gluing.

[0089] Wherein, since the second lead piece 102 can pass through the first hole 1062 and is located on the side of the cover plate 106 away from the pole core 2, when laser welding the tab 201 and the second lead piece 102, it can also effectively avoid the problem that metal particles generated during welding fall into the interior of the housing 3 and cause the battery to short-circuit.

[0090] In addition, since the second lead piece 102 is a component for collecting current, a large amount of heat will be generated during the electrochemical cycle. Therefore, in the embodiment of the present application, by disposing the second lead piece 102 on the side of the cover plate 106 away from the electrode core 2, the problem that the second lead piece 102 is likely to transfer heat to the electrode core 2, resulting in damage to the electrode core 2, can be effectively reduced.

[0091] In one embodiment, the dimension of the second lead piece 102 in the first direction is smaller than the dimension of the first hole 1062 in the first direction.

[0092] Specifically, as Figure 4 shown, in the embodiment of the present application, by setting the dimension of the second lead piece 102 in the first direction to be smaller than the dimension W of the first hole 1062 in the first direction, it can be ensured that the second lead piece 102 does not contact the cover plate 106, thereby effectively preventing the problem of short circuit caused by the contact between the second lead piece 102 and the cover plate 106.

[0093] In addition, in the embodiment of the present application, by setting the dimension of the second lead piece 102 in the first direction to be smaller than the dimension W of the first hole 1062 in the first direction, the assembly efficiency of the end cap assembly 1 can be effectively improved.

[0094] In one embodiment, the end cap assembly 1 further includes an insulating plate 108, and the insulating plate 108 is disposed on the side of the first lead piece 101 close to the cover plate 106; the insulating plate 108 includes a third pole hole 1081 and a second hole 1082 that penetrate in the second direction, the insulating plate 108 is connected to the pole 109 through the third pole hole 1081, and the second hole 1082 is used for the second lead piece 102 to pass through.

[0095] Specifically, as Figure 1 shown, when the end cap assembly 1 is a positive end cap assembly, the positive end cap assembly may include an insulating plate 108, a lead piece, a cover plate 106, a positive pole 109, a cap 107, and a sealing portion 110.

[0096] Thus, as Figure 3 shown, the installation order of the positive end cap assembly in the second direction from the side close to the electrode core 2 to the side away from the electrode core 2 is respectively a lead piece, an insulating plate 108, a cover plate 106, and a cap 107.

[0097] The insulating plate 108 includes a third pole hole 1081, a second hole 1082 and a second injection hole 1083. The insulating plate 108 can be welded and fixed to the pole 109 through the third pole hole 1081. The second injection hole 1083 is used to inject electrolyte into the battery. The cover plate 106 includes a second pole hole 1061, a first hole 1062 and a first injection hole 1063. The cover plate 106 can be welded and fixed to the pole 109 through the second pole hole 1061. The first injection hole 1063 is used to inject electrolyte into the battery. The lead-out piece includes a first lead-out piece 101 and a second lead-out piece 102. The first lead-out piece 101 includes a first pole hole 1011. The first lead-out piece 101 can be welded and fixed to the pole 109 through the first pole hole 1011. The second lead-out piece 102 passes through the first hole 1062 and the second hole 1082 in sequence along the second direction and is located on the side of the cover plate 106 away from the first lead-out piece 101. The sealing part 110 includes a sealing cap 1101 and a sealing nail 1102. After the battery is filled with liquid, the first liquid injection hole 1063 can be blocked by the sealing nail 1102, so that the sealing nail 1102 and the first liquid injection hole 1063 are interference-fitted to achieve the first sealing of the first liquid injection hole 1063. Then, the sealing cap 1101 is welded to the peripheral side of the first liquid injection hole 1063 by a laser welding process to achieve the second sealing of the first liquid injection hole 1063, thereby effectively ensuring the sealing performance of the battery.

[0098] In addition, the material of the insulating plate 108 described in the embodiment of the present application can be polypropylene, polyethylene or polyurethane, the material of the sealing nail 1102 can be EPDM rubber or silicone rubber, and the material of the sealing cap 1101 can be aluminum or copper. Technical personnel in this field can choose according to actual needs, and this application does not make any specific restrictions here.

[0099] In addition, the welding between the insulating plate 108 and the pole 109 , between the cover plate 106 and the pole 109 , and between the first lead-out piece 101 and the pole 109 in the embodiment of the present application can be performed by laser welding or ultrasonic welding.

[0100] Of course, the insulating plate 108 and the pole 109, the cover plate 106 and the pole 109, and the first lead-out piece 101 and the pole 109 described in the embodiment of the present application can also be connected by gluing, clamping or screwing. Those skilled in the art can make a choice according to actual needs, and the present application does not make any specific restrictions here.

[0101] Alternatively, if Figure 5As shown, when the end cap assembly 1 is a positive end cap assembly, the positive end cap assembly may further include an insulating plate 108, a lead sheet, a cover plate 106, a positive pole 109 and a cap 107. Thus, the installation order of the positive end cap assembly along the second direction from the side close to the pole core 2 to the side away from the pole core 2 is the lead sheet, the insulating plate 108, the cover plate 106 and the cap 107 respectively.

[0102] The insulating plate 108 includes a third pole hole 1081 and a second hole 1082, and the insulating plate 108 can be welded and fixed to the pole 109 through the third pole hole 1081. The cover plate 106 includes a second pole hole 1061 and a first hole 1062, and the cover plate 106 can be welded and fixed to the pole 109 through the second pole hole 1061. The lead-out piece includes a first lead-out piece 101 and a second lead-out piece 102, the first lead-out piece 101 includes a first pole hole 1011, and the first lead-out piece 101 can be welded and fixed to the pole 109 through the first pole hole 1011; the second lead-out piece 102 passes through the first hole 1062 and the second hole 1082 in sequence along the second direction and is located on the side of the cover plate 106 away from the first lead-out piece 101.

[0103] Alternatively, if Figure 6 As shown, when the end cap assembly 1 is a negative end cap assembly, the negative end cap assembly may include an insulating plate 108, a lead sheet, a cover plate 106, a negative pole 109, a cap 107 and an explosion-proof valve 105. Thus, the installation order of the negative end cap assembly along the second direction from the side close to the pole core 2 to the side away from the pole core 2 is the lead sheet, the insulating plate 108, the cover plate 106 and the cap 107 respectively.

[0104] Among them, the insulating plate 108 includes a third pole column hole 1081, a second hole 1082, and a second explosion-proof valve hole 1084. The insulating plate 108 can be fixedly welded to the pole column 109 through the third pole column hole 1081 and fixedly welded to the explosion-proof valve 105 through the second explosion-proof valve hole 1084. The cover plate 106 includes a second pole column hole 1061, a first hole 1062, and a first explosion-proof valve hole 1064. The cover plate 106 can be fixedly welded to the pole column 109 through the second pole column hole 1061 and fixedly welded to the explosion-proof valve 105 through the first explosion-proof valve hole 1064. The lead-out piece includes a first lead-out piece 101 and a second lead-out piece 102. The first lead-out piece 101 includes a first pole column hole 1011. The first lead-out piece 101 can be fixedly welded to the pole column 109 through the first pole column hole 1011. The second lead-out piece 102 passes through the first hole 1062 and the second hole 1082 in sequence along the second direction and is located on the side of the cover plate 106 away from the first lead-out piece 101.

[0105] In addition, the material of the explosion-proof valve 105 in the embodiment of the present application can be aluminum, copper or other materials, which can be selected by those skilled in the art according to actual needs, and the present application does not make specific limitations here.

[0106] Optionally, as Figure 10 shown, when the end cover assembly 1 is a positive end cover assembly, the positive end cover assembly may further include an insulating plate 108, a lead-out piece, a cover plate 106, a positive pole column 109, a cap 107, and a connecting piece 104.

[0107] Thus, as Figure 11 shown, the installation order of the positive end cover assembly along the second direction from the side close to the pole core 2 to the side away from the pole core 2 is the lead-out piece, the insulating plate 108, the cover plate 106, and the cap 107.

[0108] Among them, the insulating plate 108 includes a third pole column hole 1081 and second holes 1082. The insulating plate 108 can be fixedly welded to the pole column 109 through the third pole column hole 1081, and two second holes 1082 are provided. The cover plate 106 includes a second pole column hole 1061 and first holes 1062. The cover plate 106 can be fixedly welded to the pole column 109 through the second pole column hole 1061, and two first holes 1062 are provided. The lead-out piece includes a first lead-out piece 101 and a second lead-out piece 102. The first lead-out piece 101 includes a first pole column hole 1011, and the first lead-out piece 101 can be fixedly welded to the pole column 109 through the first pole column hole 1011; two second lead-out pieces 102 are provided, and the two second lead-out pieces 102 sequentially pass through the two first holes 1062 and the two second holes 1082 along the second direction respectively. Two connecting pieces 104 are provided, and the two connecting pieces 104 are respectively connected to the two second lead-out pieces 102 and the two pole lugs 201.

[0109] According to another embodiment of the present application, a battery is provided. The battery includes a battery core 2, a housing 3, and the end cover assembly 1 described in the embodiment of the present application. The housing 3 is used to mount the battery core 2 and the end cover assembly 1.

[0110] Specifically, as Figures 13 to 15 shown, the end cover assembly 1 described in the embodiment of the present application includes a positive end cover assembly and a negative end cover assembly. The positive end cover assembly and the negative end cover assembly are respectively arranged at both ends of the housing 3, and the battery core 2 is arranged inside the housing 3.

[0111] Thus, since both the positive end cover assembly and the negative end cover assembly are provided with the first lead-out piece 101 and the second lead-out piece 102, and the first lead-out piece 101 can be perpendicular to the second lead-out piece 102, when assembling the battery, the cover plate 106 of the end cover assembly 1 can be connected to the housing 3 of the battery first, and the second lead-out piece 102 extending along the second direction can be connected to the pole lug 201. In this way, compared with the prior art in which the pole lug 201 is first connected to the lead-out piece on the cover plate 106 and then the cover plate 106 is connected to the housing 3 of the end cover assembly 1, the end cover assembly 1 described in the embodiment of the present application can effectively reduce the installation space required for the pole lug 201 in the battery housing, and thus significantly improve the space utilization rate and energy density of the battery.

[0112] Among them, when the end cover assembly 1 is a positive end cover assembly, the material of the first lead-out piece and the second lead-out piece 102 is aluminum; when the end cover assembly 1 is a negative end cover assembly, the material of the first lead-out piece and the second lead-out piece 102 is copper.

[0113] In one embodiment, the battery further includes a pole tab 201 , one end of the pole tab 201 is connected to the second lead-out piece 102 , and the other end of the pole tab 201 is connected to the pole core 2 .

[0114] Specifically, Figure 5 , Figure 10 and Figure 16 As shown, in the embodiment of the present application, one end of the pole ear 201 is connected to the second lead-out piece 102 , and the other end is connected to the pole core 2 , so as to realize the connection between the second lead-out piece 102 and the pole core 2 .

[0115] The pole lug 201 includes a first pole lug 2011 and a second pole lug 2012, and the first pole lug 2011 and the second pole lug 2012 can be an integrated structure or a split structure. When the first pole lug 2011 and the second pole lug 2012 are split structures, the connection between the first pole lug 2011 and the second pole lug 2012 can be welding or gluing, etc., and those skilled in the art can select according to actual needs, and this application does not make any specific restrictions here.

[0116] In addition, in the embodiment of the present application, the first pole tab 2011 is arranged outside the shell 3, and the multiple layers of pole tabs 201 can be gathered together to form a plate shape by ultrasonic welding or gluing the pole tabs 201.

[0117] In addition, when the pole ear 201 is connected to the positive terminal cap assembly, the material of the pole ear 201 is aluminum; when the pole ear 201 is connected to the negative terminal cap assembly, the material of the pole ear 201 is copper.

[0118] According to another embodiment of the present application, an electric device is provided, and the electric device includes the battery described in the embodiment of the present application.

[0119] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0120] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An end cap assembly, characterized in that: include: A first lead-out piece (101), the first lead-out piece (101) extending in a first direction; the first lead-out piece (101) comprising a first pole hole (1011) penetrating in a second direction, the first lead-out piece (101) being connected to the pole (109) through the first pole hole (1011); A second lead-out piece (102), the second lead-out piece (102) is connected to the first lead-out piece (101), and the second lead-out piece (102) extends along a second direction; The first direction and the second direction are two intersecting directions.

2. The end cap assembly according to claim 1, characterized in that: The second lead-out piece (102) comprises a first connection portion (1021) and a second connection portion (1022), wherein the first connection portion (1021) is connected to the first lead-out piece (101), and the second connection portion (1022) is connected to the pole tab (201).

3. The end cap assembly according to claim 1, characterized in that: The first lead-out piece (101) includes a first side (1012) and a second side (1013), and the distance between the second lead-out piece (102) and the first side (1012) is equal to the distance between the second lead-out piece (102) and the second side (1013).

4. The end cap assembly according to claim 1, characterized in that: The end cover assembly (1) further comprises a third lead-out piece (103), wherein the third lead-out piece (103) extends along the first direction; Wherein, the second lead-out piece (102) is arranged between the first lead-out piece (101) and the third lead-out piece (103).

5. The end cap assembly according to claim 1, characterized in that: The end cover assembly (1) further comprises a connecting piece (104), and the second lead-out piece (102) is connected to the pole lug (201) via the connecting piece (104).

6. The end cap assembly according to claim 1, characterized in that: The second lead-out plate (102) comprises a first sub-lead-out plate (1023), a second sub-lead-out plate (1024) and an avoidance hole (1025), wherein the avoidance hole (1025) is arranged between the first sub-lead-out plate (1023) and the second sub-lead-out plate (1024).

7. The end cap assembly according to claim 1, characterized in that: The first lead-out piece (101) and the second lead-out piece (102) form an integral structure.

8. The end cap assembly according to claim 1, characterized in that: The end cover assembly (1) further comprises a cover plate (106) and a cover cap (107), wherein the cover plate (106) is arranged between the first lead-out piece (101) and the cover cap (107); The cover plate (106) comprises a second pole hole (1061) and a first hole (1062) extending along the second direction; the cover plate (106) is connected to the pole (109) via the second pole hole (1061); and the first hole (1062) is used for the second lead-out piece (102) to pass through.

9. The end cap assembly according to claim 8, characterized in that: The size of the second lead-out piece (102) along the first direction is smaller than the size of the first hole (1062) along the first direction.

10. The end cap assembly according to claim 8, characterized in that: The end cover assembly (1) further comprises an insulating plate (108), wherein the insulating plate (108) is arranged on a side of the first lead-out plate (101) close to the cover plate (106); The insulating plate (108) comprises a third pole hole (1081) and a second hole (1082) which penetrate along a second direction; the insulating plate (108) is connected to the pole (109) via the third pole hole (1081); and the second hole (1082) is used for the second lead-out plate (102) to pass through.

11. A battery, characterized in that: It comprises a pole core (2), a shell (3) and an end cover assembly (1) according to any one of claims 1 to 10, wherein the shell (3) is used for installing the pole core (2) and the end cover assembly (1).

12. The battery according to claim 11, characterized in that The battery further comprises a pole lug (201), one end of the pole lug (201) being connected to the second lead-out piece (102), and the other end of the pole lug (201) being connected to the pole core (2).

13. An electrical equipment, characterized in that: Comprising a battery as claimed in claim 11 or 12.

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