End cover assembly, battery and electrical device

Abstract

An end cover assembly (1), comprising: a first lead-out sheet (101) and a second lead-out sheet (102), the first lead-out sheet (101) extending in a first direction; the second lead-out sheet (102) is connected to the first lead-out sheet (101), and the second lead-out sheet (102) extends in a second direction, the first direction and the second direction being two intersecting directions.

Description

End cap assemblies, batteries and electrical equipment

[0001] Cross-references to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202421801992.3, filed on July 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, and in particular to an end cap assembly, a battery, and an electrical device. Background Technology

[0004] In related technologies, battery assembly typically involves first connecting the tabs to the lead-out tabs on the cover plate, and then connecting the cover plate to the casing. However, in existing technologies, the tabs inside the battery casing need to be folded to be flush with the terminals, resulting in longer tab lengths. These longer tabs occupy a significant amount of installation space, severely reducing the battery's energy density.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems.

[0006] Application content

[0007] This disclosure aims to at least partially address one of the technical problems in the related art.

[0008] Therefore, one objective of this disclosure is to propose a new technical solution for an end cap assembly, a battery, and an electrical device.

[0009] According to a first aspect of this disclosure, an end cap assembly is provided, wherein the end cap assembly includes: a first lead-out piece extending along a first direction; a second lead-out piece connected to the first lead-out piece and extending along a second direction; wherein the first direction and the second direction are two intersecting directions.

[0010] Optionally, the first lead-out piece includes a first pole hole extending along the second direction, and the first lead-out piece is connected to the pole through the first pole hole.

[0011] Optionally, the second lead-out piece includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected to the first lead-out piece, and the second connecting portion is connected to the electrode tab.

[0012] Optionally, the first lead-out piece includes 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.

[0013] Optionally, the end cap assembly further includes a third lead-out piece extending along the first direction;

[0014] The second lead is disposed between the first lead and the third lead.

[0015] Optionally, the end cap assembly further includes a connecting piece, through which the second lead-out piece is connected to the electrode tab.

[0016] Optionally, the second lead-out piece includes a first sub-lead-out piece, a second sub-lead-out piece, and a clearance hole, wherein the clearance hole is disposed between the first sub-lead-out piece and the second sub-lead-out piece.

[0017] Optionally, the first lead sheet and the second lead sheet form an integral structure.

[0018] Optionally, the end cap assembly further includes a cover plate and a cap, the cover plate being disposed between the first lead-out piece and the cap;

[0019] The cover plate includes a second pole hole and a first hole that extend along the second direction. The cover plate is connected to the pole through the second pole hole, and the first hole is used for the second lead-out piece to pass through.

[0020] Optionally, the dimension of the second lead-out piece along the first direction is smaller than the dimension of the first hole along the first direction.

[0021] Optionally, the end cap assembly further includes an insulating plate disposed on the side of the first lead-out piece near the cover plate;

[0022] The insulating plate includes a third pole hole and a second hole that extend along a second direction. The insulating plate is connected to the pole through the third pole hole, and the second hole is used for the second lead-out piece to pass through.

[0023] According to a second aspect of this disclosure, a battery is provided, including an electrode core, a housing, and an end cap assembly as described in any of the first aspects, the housing being used to mount the electrode core and the end cap assembly.

[0024] Optionally, the battery further includes a tab, one end of which is connected to the second lead plate, and the other end of which is connected to the electrode core.

[0025] According to a third aspect of this disclosure, an electrical device is provided, comprising a battery as described in any of the second aspects.

[0026] According to the end cap assembly provided in the embodiments of this disclosure, the end cap assembly includes a first lead-out piece and a second lead-out piece, the first lead-out piece extending 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; by setting the first lead-out piece and the second lead-out piece, after the end cap assembly is connected to the housing, the installation space required for the inner tabs of the battery housing can be effectively reduced, thereby significantly improving the energy density of the battery.

[0027] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0028] Figure 1 is an exploded view of an end cap assembly in one embodiment of this disclosure.

[0029] Figure 2 is a schematic diagram of the structure of the first lead sheet and the second lead sheet in one embodiment of this disclosure.

[0030] Figure 3 is the assembly drawing of Figure 1.

[0031] Figure 4 is a top view of the cover plate in one embodiment of this disclosure.

[0032] Figure 5 is an exploded view of the end cap assembly in one embodiment of this disclosure.

[0033] Figure 6 is an exploded view of the end cap assembly in one embodiment of this disclosure.

[0034] Figure 7 is a schematic diagram of the structure of the first lead sheet and the second lead sheet in one embodiment of this disclosure.

[0035] Figure 8 is a schematic diagram of the structure of the first lead sheet and the second lead sheet in one embodiment of this disclosure.

[0036] Figure 9 is a schematic diagram of the structure of the connecting piece in one embodiment of this disclosure.

[0037] Figure 10 is an exploded view of an end cap assembly in one embodiment of this disclosure.

[0038] Figure 11 is an assembly drawing of Figure 10.

[0039] Figure 12 is a schematic diagram of the structure of the first lead sheet and the second lead sheet in one embodiment of this disclosure.

[0040] Figure 13 is a schematic diagram of the battery structure in one embodiment of this disclosure.

[0041] Figure 14 is a schematic diagram of the structure of the first end of the battery in one embodiment of the present disclosure.

[0042] Figure 15 is a schematic diagram of the structure of the second end of the battery in one embodiment of the present disclosure.

[0043] Figure 16 is a schematic diagram of the electrode structure in one embodiment of this disclosure.

[0044] Figure 17 is a schematic diagram of the structure of an electrical device according to one embodiment of the present disclosure.

[0045] Reference numerals: 100, battery; 200, electrical equipment; F1, first direction; F2, second direction; F3, third direction; 1, end cap assembly; 101, first lead-out piece; 1011, first terminal hole; 1012, first side; 1013, second side; 1014, First slot; 102, Second lead-out piece; 1021, First connecting part; 1022, Second connecting part; 1023, First sub-lead-out piece; 1024, Second sub-lead-out piece; 1025, Clearance hole; 103, Third lead-out piece; 1031, Second slot; 104, Connecting piece; 105, Explosion-proof valve; 106, Cover plate; 1061, Second pole post hole; 1062, First hole; 1063, First injection hole; 1064, First explosion-proof valve hole; 107, Cap; 108, Insulating plate; 1081, Third pole post hole; 1082, Second hole; 1083, Second injection hole; 1084, Second explosion-proof valve hole; 109, Pole post; 110, Sealing part; 1101, Sealing cap; 1102, Sealing pin; 2. Electrode core; 201. Electrode tab; 2011. First electrode tab; 2012. Second electrode tab; 3. Housing. Detailed Implementation

[0046] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0047] According to one embodiment of this disclosure, an end cap assembly 1 is provided. Referring to Figures 1 to 16, the end cap assembly 1 includes a first lead-out piece 101 and a second lead-out piece 102, the first lead-out piece 101 extending along a first direction F1; the second lead-out piece 102 is connected to the first lead-out piece 101 and extends along a second direction F2; wherein the first direction F1 and the second direction F2 are two intersecting directions.

[0048] Specifically, in this embodiment, 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 shown in FIG2, by setting the first direction F1 as the X-axis direction and the second direction F2 as the Z-axis direction, after the first lead-out piece 101 and the second lead-out piece 102 are connected, the angle between the first lead-out piece 101 and the second lead-out piece 102 is a right angle, ensuring that the first lead-out piece 101 and the second lead-out piece 102 are perpendicular to each other. In this way, compared to the prior art where the tabs 201 inside the battery casing need to be folded to be flush with the terminals, the end cap assembly 1 in this embodiment can effectively reduce the installation space required for the tabs 201 inside the battery casing, thereby significantly improving the space utilization and energy density of the battery 100.

[0049] Furthermore, since the end cap assembly 1 described in this embodiment of the present disclosure allows the tab 201 to be folded inside the battery casing, it also effectively avoids the problem of short circuit caused by the tab 201 contacting the electrode core 2 of the battery 100.

[0050] In this embodiment of the present disclosure, the included angle between the first lead-out piece 101 and the second lead-out piece 102 can also be an acute angle. Those skilled in the art can choose according to actual needs, and the present disclosure does not impose specific limitations here.

[0051] In one embodiment, the first lead-out piece 101 includes a first pole hole 1011 extending along the second direction F2, and the first lead-out piece 101 is connected to the pole 109 through the first pole hole 1011.

[0052] Specifically, as shown in Figures 1 and 2, in this embodiment of the present disclosure, the first pole hole 1011 can be an elliptical hole to better accommodate the elliptical pole 109, and can also effectively ensure the stability and reliability of the connection between the first lead-out piece 101 and the pole 109.

[0053] Of course, the first pole hole 1011 in the embodiments of this disclosure can also be circular or square, etc., to better adapt to poles 109 of different shapes. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific limitations.

[0054] In this embodiment, the pole post 109 can be connected and fixed to the first pole post hole 1011 by laser welding or adhesive bonding.

[0055] Furthermore, the material of the pole post 109 described in this embodiment may include at least one of epoxy resin, plastic, metal or ceramic. Those skilled in the art can choose according to actual needs, and this disclosure does not impose specific limitations.

[0056] In one embodiment, the second lead-out piece 102 includes a first connecting portion 1021 and a second connecting portion 1022, wherein the first connecting portion 1021 is connected to the first lead-out piece 101 and the second connecting portion 1022 is connected to the tab 201.

[0057] Specifically, as shown in FIG2, in this embodiment of the present disclosure, the first connecting portion 1021 is a triangular protrusion, and the second lead-out piece 102 is connected to the first lead-out piece 101 through the triangular protrusion, which can significantly enhance the connection strength and reliability between the first lead-out piece 101 and the second lead-out piece 102.

[0058] Of course, the first connecting part 1021 in the embodiments of this disclosure can also be a rectangular, circular, I-shaped, T-shaped, Z-shaped or cross-shaped structure, etc. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific limitations.

[0059] Furthermore, in the embodiments of this disclosure, the first connecting portion 1021 and the first lead-out piece 101 can be an integral structure or a separate structure.

[0060] When the first connecting part 1021 and the first lead-out piece 101 are separate structures, the connection between the first connecting part 1021 and the first lead-out piece 101 can be welding or gluing, etc. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific restrictions.

[0061] In addition, the connection between the second connecting part 1022 and the tab 201 in the embodiments of this disclosure can be laser welding or ultrasonic welding, etc. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific restrictions.

[0062] In one embodiment, 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.

[0063] Specifically, as shown in FIG7, in this embodiment of the present disclosure, the width direction of the end cap assembly 1 can be set as the Y-axis direction, and the third direction F3 can be set as the Y-axis direction, so that the first direction F1, the second direction F2 and the third direction F3 are arranged perpendicularly to each other, and the first lead-out piece 101 is arranged as the first side 1012 and the second side 1013 on both sides along the third direction F3.

[0064] Therefore, by placing the second lead-out piece 102 in the middle of the first lead-out piece 101 along the third direction F3, so that 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, the problem of the electrode 201 easily contacting the electrode core 2 and causing a short circuit can be further reduced after the first lead-out piece 101 is connected to the electrode tab 201.

[0065] Furthermore, since the second lead-out piece 102 is located in the middle of the first lead-out piece 101 along the third direction F3, when connecting the second lead-out piece 102 and the electrode 201, the electrode 201 can also be provided on both sides of the second lead-out piece 102 along the third direction F3, so as to further reduce the problem of poor soldering that is easy to occur when welding the second lead-out piece 102 and the electrode 201.

[0066] In one embodiment, the end cap assembly 1 further includes a third lead-out piece 103 extending along the first direction F1; wherein the second lead-out piece 102 is disposed between the first lead-out piece 101 and the third lead-out piece 103.

[0067] Specifically, as shown in Figures 7 and 12, the lead sheet in the embodiments of this disclosure may include a first lead sheet 101, a second lead sheet 102, and a third lead sheet 103. By disposing the second lead sheet 102 between the first lead sheet 101 and the third lead sheet 103, the stability and reliability of the lead sheet can be effectively enhanced.

[0068] In one embodiment, the end cap assembly 1 further includes a connecting piece 104, through which the second lead-out piece 102 is connected to the tab 201.

[0069] Specifically, as shown in Figures 8 to 11, in this embodiment of the present disclosure, the first lead-out piece 101 and the second lead-out piece 102 can be formed into a U-shaped structure, so that the second lead-out piece 102 is shorter in length along the second direction F2, thereby significantly improving the stability and reliability of the first lead-out piece 101 and the second lead-out piece 102.

[0070] As shown in Figure 8, in this embodiment of the present disclosure, there are two second lead-out pieces 102, which are disposed at both ends of the first lead-out piece 101 along the first direction F1.

[0071] Furthermore, as shown in Figures 9 to 11, the end cap assembly 1 of the present disclosure embodiment also includes a connecting piece 104. The connecting piece 104 has an L-shaped structure. The L-shaped connecting piece 104 can effectively connect the lead-out piece to the electrode tab 201, and significantly ensure the stability and reliability of the connection between the lead-out piece and the electrode tab 201.

[0072] In addition, the connecting piece 104 described in this embodiment can be made of aluminum or copper, etc., and those skilled in the art can choose according to actual needs. This disclosure does not impose specific limitations here.

[0073] In one embodiment, the second lead-out piece 102 includes a first sub-lead-out piece 1023, a second sub-lead-out piece 1024, and a clearance hole 1025, wherein the clearance hole 1025 is disposed between the first sub-lead-out piece 1023 and the second sub-lead-out piece 1024.

[0074] Specifically, as shown in Figure 12, in this embodiment of the present disclosure, by setting the clearance hole 1025 between the first sub-lead sheet 1023 and the second sub-lead sheet 1024, when the battery 100 has a multi-core 2 structure, the tabs 201 of the multiple cores 2 can be welded to the side of the first sub-lead sheet 1023 or the second sub-lead sheet 1024 away from the clearance hole 1025 along the second direction F2. In this way, it is effectively ensured that the tabs 201 of the multiple cores 2 can be gathered in the middle position of the multiple cores 2, significantly reducing the number of layers connected between the multiple tabs 201 and a single sub-lead sheet, and reducing the problem of poor soldering when the tabs 201 are welded to the second lead sheet 102.

[0075] Furthermore, by disposing the clearance hole 1025 between the first sub-lead plate 1023 and the second sub-lead plate 1024 in this embodiment, the clearance hole 1025 can also serve as an airflow channel for the gas generated during the electrochemical cycle. In this way, when the battery 100 experiences thermal runaway, the substances inside the battery 100 can be quickly discharged, thereby effectively extending the service life of the battery 100.

[0076] In addition, as shown in FIG12, the first lead-out piece 101 in this embodiment of the present disclosure further includes a first slot 1014, and the third lead-out piece 103 further includes a second slot 1031. In this way, when fixing the lead-out piece, the hook provided in the top spacer cooperates with the first slot 1014 and the second slot 1031, which can effectively ensure the reliability of the lead-out piece fixing.

[0077] In one embodiment, the first lead-out piece 101 and the second lead-out piece 102 form an integral structure.

[0078] Specifically, as shown in Figures 2, 8 and 12, the embodiments of this disclosure effectively improve the reliability of the lead-out pieces by setting the first lead-out piece 101 and the second lead-out piece 102 to form an integral structure.

[0079] Furthermore, as shown in FIG7, the first lead-out piece 101 and the second lead-out piece 102 in this embodiment of the present disclosure can also be a separate structure.

[0080] When the first lead-out piece 101 and the second lead-out piece 102 are separate structures, the connection between the first lead-out piece 101 and the second lead-out piece 102 can be welding or gluing, etc. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific restrictions.

[0081] 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-out piece 101 and the cap 107. The cover plate 106 includes a second pole post hole 1061 and a first hole 1062 that pass through along the second direction F2. The cover plate 106 is connected to the pole post 109 through the second pole post hole 1061, and the first hole 1062 is used for the second lead-out piece 102 to pass through.

[0082] Specifically, as shown in Figures 1, 5, 6, and 10, the cover plate 106 of this embodiment can be made of aluminum, copper, or a copper-aluminum composite material, and the cap 107 can be made of 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-out piece 102. The pole post 109 can be fixed to the second pole post hole 1061 by laser welding or adhesive bonding.

[0083] Since the second lead-out piece 102 can pass through the first hole 1062 and is located on the side of the cover plate 106 away from the electrode core 2, when the electrode tab 201 and the second lead-out piece 102 are welded using laser welding process, the problem of metal particles generated during welding falling into the casing 3 and causing a short circuit in the battery 100 can be effectively avoided.

[0084] Furthermore, since the second lead plate 102 is a component that collects current, it generates a large amount of heat during the electrochemical cycle. Therefore, by placing the second lead plate 102 on the side of the cover plate 106 away from the electrode core 2, this embodiment of the present disclosure can effectively reduce the problem that the second lead plate 102 can easily transfer heat to the electrode core 2, causing damage to the electrode core 2.

[0085] In one embodiment, the size of the second lead-out piece 102 along the first direction F1 is smaller than the size of the first hole 1062 along the first direction F1.

[0086] Specifically, as shown in FIG4, in this embodiment of the present disclosure, by setting the size of the second lead-out piece 102 along the first direction F1 to be smaller than the size W of the first hole 1062 along the first direction F1, the second lead-out piece 102 can be prevented from contacting the cover plate 106, thereby effectively preventing the problem of short circuit caused by the second lead-out piece 102 contacting the cover plate 106.

[0087] Furthermore, by setting the size of the second lead-out piece 102 along the first direction F1 to be smaller than the size W of the first hole 1062 along the first direction F1 in the embodiments of this disclosure, the assembly efficiency of the end cap assembly 1 can also be effectively improved.

[0088] In one embodiment, the end cap assembly 1 further includes an insulating plate 108, which is disposed on the side of the first lead-out piece 101 near the cover plate 106; the insulating plate 108 includes a third pole post hole 1081 and a second hole 1082 extending along the second direction F2, the insulating plate 108 is connected to the pole post 109 through the third pole post hole 1081, and the second hole 1082 is used for the second lead-out piece 102 to pass through.

[0089] Specifically, as shown in Figure 1, 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-out piece, a cover plate 106, a positive terminal post 109, a cap 107, and a sealing part 110.

[0090] Thus, as shown in Figure 3, the installation sequence of the positive end cap assembly along the second direction F2 from the side closest to the pole core 2 to the side furthest from the pole core 2 is the lead-out piece, the insulating plate 108, the cover plate 106, and the cap 107, respectively.

[0091] The insulating plate 108 includes a third terminal hole 1081, a second hole 1082, and a second electrolyte injection hole 1083. The insulating plate 108 can be welded and fixed to the terminal 109 through the third terminal hole 1081, and the second electrolyte injection hole 1083 is used to inject electrolyte into the battery 100. The cover plate 106 includes a second terminal hole 1061, a first hole 1062, and a first electrolyte injection hole 1063. The cover plate 106 can be welded and fixed to the terminal 109 through the second terminal hole 1061, and the first electrolyte injection hole 1063 is used to inject electrolyte into the battery 100. 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 F2 and is located on the side of the cover plate 106 opposite to the first lead-out piece 101. The sealing part 110 includes a sealing cap 1101 and a sealing pin 1102. After the battery 100 is filled with liquid, the first liquid filling hole 1063 can be blocked by the sealing pin 1102, so that the sealing pin 1102 and the first liquid filling hole 1063 are interference fit, thereby achieving a primary seal of the first liquid filling hole 1063. Then, the sealing cap 1101 is welded to the periphery of the first liquid filling hole 1063 by laser welding process, thereby achieving a secondary seal of the first liquid filling hole 1063, thus effectively ensuring the sealing performance of the battery 100.

[0092] Furthermore, the insulating board 108 described in this embodiment can be made of polypropylene, polyethylene, or polyurethane, the sealing nail 1102 can be made of EPDM rubber or silicone rubber, and the sealing cap 1101 can be made of aluminum or copper. Those skilled in the art can make the selection according to actual needs, and this disclosure does not impose any specific limitations.

[0093] In addition, the welding between the insulating plate 108 and the pole post 109, between the cover plate 106 and the pole post 109, and between the first lead-out piece 101 and the pole post 109 in the embodiments of this disclosure can be performed using laser welding or ultrasonic welding.

[0094] Of course, the insulating plate 108 and the pole post 109, the cover plate 106 and the pole post 109, and the first lead-out piece 101 and the pole post 109 described in this embodiment can also be connected by adhesive bonding, snap-fitting or screwing. Those skilled in the art can choose according to actual needs, and this disclosure does not make specific restrictions here.

[0095] Optionally, as shown in Figure 5, 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-out piece, a cover plate 106, a positive terminal post 109, and a cap 107. Thus, the installation sequence of the positive end cap assembly along the second direction F2 from the side closest to the electrode core 2 to the side furthest from the electrode core 2 is the lead-out piece, insulating plate 108, cover plate 106, and cap 107, respectively.

[0096] The insulating plate 108 includes a third terminal hole 1081 and a second hole 1082, and the insulating plate 108 can be welded and fixed to the terminal 109 through the third terminal hole 1081. The cover plate 106 includes a second terminal hole 1061 and a first hole 1062, and the cover plate 106 can be welded and fixed to the terminal 109 through the second terminal 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 terminal hole 1011, and the first lead-out piece 101 can be welded and fixed to the terminal 109 through the first terminal hole 1011. The second lead-out piece 102 passes through the first hole 1062 and the second hole 1082 sequentially along the second direction F2 and is located on the side of the cover plate 106 opposite to the first lead-out piece 101.

[0097] Optionally, as shown in FIG6, 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-out piece, a cover plate 106, a negative terminal post 109, a cap 107, and an explosion-proof valve 105. Thus, the installation sequence of the negative end cap assembly along the second direction F2 from the side closest to the electrode core 2 to the side furthest from the electrode core 2 is the lead-out piece, the insulating plate 108, the cover plate 106, and the cap 107, respectively.

[0098] The insulating plate 108 includes a third pole hole 1081, a second hole 1082, and a second explosion-proof valve hole 1084. The insulating plate 108 can be welded and fixed to the pole 109 through the third pole hole 1081, and to the explosion-proof valve 105 through the second explosion-proof valve hole 1084. The cover plate 106 includes a second pole hole 1061, a first hole 1062, and a first explosion-proof valve hole 1064. The cover plate 106 can be welded and fixed to the pole 109 through the second pole hole 1061, and 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 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 F2 and is located on the side of the cover plate 106 opposite to the first lead-out piece 101.

[0099] Furthermore, the explosion-proof valve 105 described in this embodiment can be made of materials such as aluminum or copper. Those skilled in the art can choose according to actual needs, and this disclosure does not impose specific limitations.

[0100] Optionally, as shown in FIG10, 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-out piece, a cover plate 106, a positive terminal post 109, a cap 107, and a connecting piece 104.

[0101] Thus, as shown in Figure 11, the installation sequence of the positive end cap assembly along the second direction F2 from the side closest to the pole core 2 to the side furthest from the pole core 2 is the lead-out piece, the insulating plate 108, the cover plate 106, and the cap 107, respectively.

[0102] The insulating plate 108 includes a third terminal hole 1081 and a second hole 1082. The insulating plate 108 can be welded and fixed to the terminal 109 through the third terminal hole 1081, and two second holes 1082 are provided. The cover plate 106 includes a second terminal hole 1061 and a first hole 1062. The cover plate 106 can be welded and fixed to the terminal 109 through the second terminal 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 terminal hole 1011, and the first lead-out piece 101 can be welded and fixed to the terminal 109 through the first terminal hole 1011. Two second lead-out pieces 102 are provided, and the two second lead-out pieces 102 pass through the two first holes 1062 and the two second holes 1082 sequentially along the second direction F2, 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 tabs 201.

[0103] As shown in Figure 13, according to another embodiment of the present disclosure, a battery 100 is provided, which includes an electrode core 2, a housing 3 and an end cap assembly 1 as described in the embodiments of the present disclosure, wherein the housing 3 is used to install the electrode core 2 and the end cap assembly 1.

[0104] Specifically, as shown in Figures 13 to 15, the end cap assembly 1 of the present disclosure embodiment includes a positive end cap assembly and a negative end cap assembly, the positive end cap assembly and the negative end cap assembly are respectively disposed at both ends of the housing 3, and the pole core 2 is disposed inside the housing 3.

[0105] Therefore, since both the positive and negative end cap assemblies 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 100, the cover plate 106 of the end cap assembly 1 can be connected to the housing 3 of the battery 100 first, and the second lead-out piece 102 extending along the second direction F2 can be connected to the tab 201. Thus, compared to the prior art where the tab 201 is first connected to the lead-out piece on the cover plate 106, and then the cover plate 106 is connected to the end cap assembly 1 of the housing 3, the end cap assembly 1 of this embodiment can effectively reduce the installation space required for the tab 201 within the battery housing, thereby significantly improving the space utilization and energy density of the battery 100.

[0106] Wherein, when the end cap assembly 1 is a positive end cap assembly, the material of the first lead-out piece and the second lead-out piece 102 is aluminum; when the end cap assembly 1 is a negative end cap assembly, the material of the first lead-out piece and the second lead-out piece 102 is copper.

[0107] In one embodiment, the battery 100 further includes a tab 201, one end of which is connected to the second lead plate 102, and the other end of which is connected to the electrode core 2.

[0108] Specifically, as shown in Figures 5, 10 and 16, in this embodiment of the present disclosure, one end of the tab 201 is connected to the second lead plate 102, and the other end is connected to the electrode core 2, thereby realizing the connection between the second lead plate 102 and the electrode core 2.

[0109] The electrode tab 201 includes a first electrode tab 2011 and a second electrode tab 2012, which can be an integral structure or a separate structure. When the first electrode tab 2011 and the second electrode tab 2012 are separate structures, the connection between them can be welding or gluing, etc., and those skilled in the art can choose according to actual needs; this disclosure does not impose specific limitations.

[0110] Furthermore, in this embodiment of the present disclosure, the first tab 2011 is disposed on the outside of the housing 3, and multiple tabs 201 sheets can be gathered together to form a plate by ultrasonic welding or adhesive bonding.

[0111] In addition, when the tab 201 is connected to the positive end cap assembly, the tab 201 is made of aluminum; when the tab 201 is connected to the negative end cap assembly, the tab 201 is made of copper.

[0112] As shown in FIG17, according to another embodiment of the present disclosure, an electrical device 200 is provided, which includes the battery 100 described in the embodiments of the present disclosure.

[0113] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0114] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0115] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0116] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0117] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0118] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. An end cap assembly (1), wherein, The application relates to an end cover assembly (1) of a battery, comprising: a first lead-out sheet (101) extending along a first direction (F1); a second lead-out sheet (102) connected with the first lead-out sheet (101) and extending along a second direction (F2); wherein the first direction (F1) and the second direction (F2) are two intersecting directions.

2. The end cap assembly (1) according to claim 1, wherein The first lead-out sheet (101) comprises a first pole column hole (1011) penetrating along the second direction (F2), and the first lead-out sheet (101) is connected with a pole column (109) through the first pole column hole (1011).

3. The end cap assembly (1) according to any one of claims 1-2, wherein, The second lead-out sheet (102) comprises a first connecting part (1021) connected with the first lead-out sheet (101) and a second connecting part (1022) connected with a pole lug (201).

4. The end cap assembly (1) according to any one of claims 1-3, wherein, The first lead-out sheet (101) comprises a first side (1012) and a second side (1013), and the distance between the second lead-out sheet (102) and the first side (1012) is equal to the distance between the second lead-out sheet (102) and the second side (1013).

5. The end cap assembly (1) according to any one of claims 1-4, wherein, The end cover assembly (1) further comprises a third lead-out sheet (103) extending along the first direction (F1); wherein the second lead-out sheet (102) is arranged between the first lead-out sheet (101) and the third lead-out sheet (103).

6. The end cap assembly (1) according to any one of claims 1-5, wherein, The end cover assembly (1) further comprises a connecting sheet (104), and the second lead-out sheet (102) is connected with the pole lug (201) through the connecting sheet (104).

7. The end cap assembly (1) according to any one of claims 1-6, wherein, The second lead-out sheet (102) comprises a first sub-lead-out sheet (1023), a second sub-lead-out sheet (1024) and a avoiding hole (1025) arranged between the first sub-lead-out sheet (1023) and the second sub-lead-out sheet (1024).

8. The end cap assembly (1) according to any one of claims 1-7, wherein, The first lead-out sheet (101) and the second lead-out sheet (102) form an integrated structure.

9. The end cap assembly (1) according to any one of claims 1-8, wherein, The end cover assembly (1) further comprises a cover plate (106) and a cover cap (107), and the cover plate (106) is arranged between the first lead-out sheet (101) and the cover cap (107); The cover plate (106) comprises a second pole column hole (1061) penetrating along the second direction (F2) and a first hole (1062), the cover plate (106) is connected with the pole column (109) through the second pole column hole (1061), and the first hole (1062) is used for allowing the second lead-out sheet (102) to pass through.

10. The end cap assembly (1) according to claim 9, wherein The size of the second lead-out sheet (102) along the first direction (F1) is smaller than the size of the first hole (1062) along the first direction (F1).

11. The end cap assembly (1) according to any one of claims 9-10, wherein, The end cover assembly (1) further comprises an insulating plate (108) arranged on the side of the first lead-out sheet (101) close to the cover plate (106). The insulating plate (108) comprises a third pole post hole (1081) and a second hole (1082) penetrating along the second direction (F2), the insulating plate (108) is connected with the pole post (109) through the third pole post hole (1081), and the second hole (1082) is used for the second lead-out sheet (102) to pass through.

12. A battery (100), wherein The battery (100) comprises a pole core (2), a shell (3) and the end cover assembly (1) as claimed in any one of claims 1-11, and the shell (3) is used for mounting the pole core (2) and the end cover assembly (1).

13. The battery (100) of claim 12, wherein, The battery further comprises a pole lug (201), one end of the pole lug (201) is connected with the second lead-out sheet (102), and the other end of the pole lug (201) is connected with the pole core (2).

14. An electrical consumer (200), wherein The battery (100) as claimed in claim 12 or 13.

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