Tab leading-out sheet, cover plate assembly, battery and electric equipment

Abstract

The invention discloses a tab lead-out sheet, a cover plate assembly, a battery and electric equipment, and relates to the technical field of batteries. The tab lead-out piece comprises a pole connecting part and a tab connecting part, the pole connecting part is used for connecting a pole, the tab connecting part is used for connecting a tab, the tab connecting part is connected with the pole connecting part, and the tab connecting part protrudes towards one side of the pole connecting part relative to the pole connecting part. According to the tab lead-out sheet, the tab connecting part is designed to protrude towards one side of the pole connecting part, so that after the tab is connected with the tab connecting part, the tab also protrudes towards one side of the pole connecting part without occupying too much space on the other side of the pole connecting part, and a pole core is conveniently mounted in the space on the other side of the pole connecting part; and the tab is not easy to bend in the space on the other side of the pole connecting part, so that the risk of short circuit caused by contact between the tab and other pole cores is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a tab lead-out sheet, a cover plate assembly, a battery, and an electrical device. Background Art

[0002] In related technologies, batteries include a housing, a core, tabs, and a cover. The core and tabs are located inside the housing, while the cover seals the open end of the housing. The tabs are connected to the core. Due to the limited space below the cover, the tabs often bend. Bent tabs can easily waste space below the cover, reducing space utilization. Overly crowded tabs can also increase the risk of tab-core contact, potentially causing a short circuit. Therefore, there is room for improvement. Summary of the Invention

[0003] The present application aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present application proposes a tab lead-out sheet so that the tab does not occupy too much space where the tab core is located.

[0004] The present application also proposes a cover plate assembly having the above-mentioned tab lead-out piece.

[0005] The present application also proposes a battery having the above-mentioned cover plate assembly.

[0006] The present application also proposes an electrical device having the battery.

[0007] According to an embodiment of the present application, the tab lead-out piece includes: a pole connecting portion and a tab connecting portion, wherein the pole connecting portion is used to connect the pole, the tab connecting portion is used to connect the tab, the tab connecting portion is connected to the pole connecting portion, and the tab connecting portion protrudes toward one side of the pole connecting portion relative to the pole connecting portion.

[0008] According to the tab lead-out piece of the embodiment of the present application, by designing the tab connection part to protrude toward one side of the pole connection part, after the tab is connected to the tab connection part, the tab also protrudes toward one side of the pole connection part without occupying too much space on the other side of the pole connection part, making it convenient to install the pole core in the space on the other side of the pole connection part, which is beneficial to improving space utilization, and the tab is not easy to bend in the space on the other side of the pole connection part, reducing the risk of short circuit caused by contact between the tab and other pole cores.

[0009] According to some embodiments of the present application, there are multiple tab connection parts or multiple pole connection parts.

[0010] According to some embodiments of the present application, the tab connection portion is connected to the pole connection portion in a first direction.

[0011] According to some embodiments of the present application, the tab connection portion has a first side surface and a second side surface disposed opposite to each other, and a side of the first side surface facing away from the second side surface forms a lead-out cavity for the tab to pass through, and the first side surface is used to connect the tab.

[0012] According to some embodiments of the present application, the tab connection portion is connected to the pole connection portion in a first direction, the tab connection portion protrudes in a second direction relative to the pole connection portion, and the tab connection portion is recessed in a third direction relative to the adjacent pole connection portion to form the lead-out cavity, and the first direction, the second direction and the third direction are perpendicular to each other.

[0013] According to some embodiments of the present application, the tab connection portion is configured as a sheet-like structure.

[0014] According to some embodiments of the present application, the tab connection portion is configured as a boss, and the tab connection portion further has a connection portion top surface connecting the first side surface and the second side surface, and the connection portion top surface is used to connect the tab.

[0015] According to some embodiments of the present application, a pole connecting hole for connecting a pole is provided on the pole connecting portion.

[0016] According to the second aspect of the present application, the cover plate assembly includes a cover plate, a pole, a cap and the above-mentioned tab lead-out piece, the cover plate is located on one side of the tab lead-out piece, the pole is arranged on the cover plate and is connected and fixed to the pole connecting part, a cap hole is provided on the cover plate, the cap is arranged in the cap hole and protrudes to the side away from the tab lead-out piece, a cap cavity connected to the cap hole is formed in the cap, and the tab connecting part at least partially extends into the cap cavity through the cap hole.

[0017] According to the cover plate assembly of the embodiment of the present application, by designing the pole ear connection part of the pole ear lead-out piece to protrude toward one side of the pole column connection part and extend into the cap cavity, the pole ear can be connected to the pole ear connection part. The pole ear also protrudes toward one side of the pole column connection part without occupying too much space on the other side of the pole column connection part, which makes it convenient to install the pole core in the space on the other side of the pole column connection part, which is beneficial to improving space utilization. In addition, the pole ear is not easy to bend in the space on the other side of the pole column connection part, reducing the risk of short circuit caused by contact between the pole ear and other pole cores.

[0018] According to some embodiments of the present application, a pole hole is provided on the cover plate, and the pole is connected and fixed to the pole connecting portion after passing through the pole hole, and the pole hole and the cap hole are spaced apart in the first direction.

[0019] According to some embodiments of the present application, the cap hole includes a small diameter portion and a large diameter portion, the large diameter portion is connected to an end of the small diameter portion away from the tab lead-out piece, and a step surface is formed between the large diameter portion and the small diameter portion, the cap includes a cap body and a cap edge, the cap cavity is formed in the cap body, the cap edge protrudes outward from the outer circumference of the cap body, and the cap edge is fixed to the step surface.

[0020] According to some embodiments of the present application, M poles constitute a pole group, and N caps constitute a cap group, where M and N are both positive integers, and the pole groups and the cap groups are arranged alternately.

[0021] According to some embodiments of the present application, a positive pole hole is provided on the cover plate; and / or a negative pole hole is provided on the cover plate.

[0022] According to the battery of the third embodiment of the present application, it includes a shell, a pole core and the above-mentioned cover plate assembly, the shell has an installation space, at least one end of the shell is an open end, the cover plate assembly is arranged at the open end, the pole core is arranged in the installation space, the pole core is located on the side of the pole tab lead-out piece away from the cover plate, the pole core has a pole tab, and the pole tab at least partially extends into the cap cavity through the cap hole and is connected and fixed to the pole tab connecting portion.

[0023] According to the battery of the embodiment of the present application, by designing the tab connection part of the tab lead-out piece to protrude toward one side of the pole connection part and extend into the cap cavity, after the tab is connected to the tab connection part, the tab also protrudes toward one side of the pole connection part and extends into the cap cavity without occupying too much installation space in the shell, making it convenient to install the pole core in the installation space on the other side of the pole connection part, which is beneficial to improving space utilization, and the tab is not easy to bend in the installation space, reducing the risk of short circuit due to contact between the tab and other pole cores.

[0024] According to some embodiments of the present application, the shell has a first open end and a second open end, and there are two cover plate assemblies, one of which is a positive cover plate assembly and the other is a negative cover plate assembly. The positive cover plate assembly is arranged at the first open end, and a positive pole column hole is provided on the cover plate of the positive cover plate assembly. The negative cover plate assembly is arranged at the second open end, and a negative pole column hole is provided on the cover plate of the negative cover plate assembly. The tabs include a positive tab and a negative tab, and the positive tab is connected and fixed to the tab connecting portion of the positive cover plate assembly, and the negative tab is connected and fixed to the tab connecting portion of the negative cover plate assembly.

[0025] According to some embodiments of the present application, the length of the shell is greater than the width of the shell and the thickness of the shell; the positive cover plate assembly and the negative cover plate assembly are arranged at both ends of the shell in the length direction, or the positive cover plate assembly and the negative cover plate assembly are arranged at both ends of the shell in the width direction.

[0026] According to some embodiments of the present application, the shell has an open end, the cover plate is provided with a positive pole post hole and a negative pole post hole, the tabs include a positive pole tab and a negative pole tab, there are multiple tab connection parts, and the positive pole tab and the negative pole tab are connected and fixed to different tab connection parts.

[0027] According to some embodiments of the present application, after the tab and the tab connecting portion are connected and fixed, an insulating layer is coated on the outside of the tab and the tab connecting portion.

[0028] According to some embodiments of the present application, the tab connection portion and the pole connection portion are alternately connected in a first direction. In the first direction, the length of the tab connection portion and the length of the tab satisfy the relationship: 0.5<length of the tab / length of the tab connection portion<0.95.

[0029] According to some embodiments of the present application, the length of the pole core is L, the length of the pole lug is Lr, the number of the pole lugs is n, and L, Lr, and n satisfy the relationship: 0<n*Lr / L<1.

[0030] According to some embodiments of the present application, the height of the tab protruding from the pole core toward the cover plate assembly is h, the thickness of the pole core is H, and h and H satisfy the relationship: 0<h / H<0.5.

[0031] The electrical equipment according to the fourth embodiment of the present application includes the above-mentioned battery.

[0032] According to the electrical equipment of the embodiment of the present application, by designing the pole ear connection part of the pole ear lead-out piece to protrude toward one side of the pole column connection part and extend into the cap cavity, after the pole ear is connected to the pole ear connection part, the pole ear also protrudes toward one side of the pole column connection part and extends into the cap cavity without occupying too much installation space in the shell, making it convenient to install the pole core in the installation space on the other side of the pole column connection part, which is beneficial to improving space utilization, and the pole ear is not easy to bend in the installation space, reducing the risk of short circuit due to contact between the pole ear and other pole cores.

[0033] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1Schematic diagram of a tab lead-out sheet according to one embodiment of the present application;

[0035] Figure 2 is a schematic diagram of a tab lead-out sheet according to another embodiment of the present application;

[0036] Figure 3 The cover, the ear and Figure 2 The connection diagram of the tab lead-out piece shown;

[0037] Figure 4 The cover, the ear and Figure 2 An exploded schematic diagram of the tab lead-out sheet is shown;

[0038] Figure 5 is a three-dimensional schematic diagram of a battery according to an embodiment of the present application;

[0039] Figure 6 is a schematic diagram of an explosion of a battery according to an embodiment of the present application;

[0040] Figure 7 yes Figure 6 A partial enlarged schematic diagram of point A in the middle;

[0041] Figure 8 Schematic diagram of the connection between the cap and the cover plate;

[0042] Figure 9 is a cross-sectional view of a battery according to one embodiment of the present application;

[0043] Figure 10 is a front view of a battery according to another embodiment of the present application;

[0044] Figure 11 yes Figure 10 a top view of the battery shown;

[0045] Figure 12 yes Figure 10 a bottom view of the battery shown;

[0046] Figure 13 It is a three-dimensional schematic diagram of the pole core and the pole ear;

[0047] Figure 14 It is the main view of the pole core and the pole ear;

[0048] Figure 15 is a front view of a battery according to another embodiment of the present application;

[0049] Figure 16 It is a schematic diagram of the arrangement of poles and caps;

[0050] Figure 17 This is another diagram of the arrangement of poles and caps;

[0051] Figure 18 This is another arrangement diagram of poles and caps;

[0052] Figure 19 It is a schematic diagram of an electrical device according to an embodiment of the present application.

[0053] Reference numerals:

[0054] Electrical equipment 10000, battery 1000, cover plate assembly 100, positive electrode cover plate assembly 100a, negative electrode cover plate assembly 100b, tab lead-out piece 10, pole connecting portion 1, pole connecting hole 11, tab connecting portion 2, first side surface 21, second side surface 22, connecting portion top surface 23, lead-out cavity 3, cover plate 20, cap hole 201, small diameter portion 2011, large diameter portion 201 2. Step surface 2013, pole hole 202, injection hole 203, explosion-proof valve 204, pole 30, positive pole 30a, negative pole 30b, cap 40, positive cap 40a, negative cap 40b, cap cavity 401, cap body 402, cap edge 403, shell 200, pole core 300, pole tab 400, positive pole tab 400a, negative pole tab 400b. DETAILED DESCRIPTION

[0055] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0056] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0057] The following combination Figures 1-19 The tab lead-out sheet 10 , the cap assembly 100 , the battery 1000 and the electrical device 10000 according to the embodiments of the present application are described in detail.

[0058] Reference Figures 1-4 and Figure 6 As shown, according to an embodiment of the present application, the tab lead-out piece 10 may include a pole connection part 1 and a tab connection part 2, the pole connection part 1 is used to connect the pole 30, the tab connection part 2 is used to connect the pole tab 400, the tab connection part 2 is connected to the pole connection part 1, and the tab connection part 2 protrudes toward one side of the pole connection part 1 relative to the pole connection part 1.

[0059] like Figure 1-Figure 2 and Figure 9 As shown, the tab connection portion 2 protrudes toward the Y side of the post connection portion 1 relative to the post connection portion 1, and the pole core 300 is located on the opposite side of the Y side of the post connection portion 1. For example, the tab connection portion 2 protrudes upward relative to the post connection portion 1, and the pole core 300 is located below the post connection portion 1. This prevents the tab 400 from excessively encroaching on the space occupied by the pole core 300, which helps increase the space occupied by the pole core 300 within the battery housing 200 of the battery 1000.

[0060] Optionally, the tab 400 and the tab connection portion 2 may be fixed by welding or gluing. The welding fixation method may be any method such as laser welding, ultrasonic welding, pulse welding, etc. Ultrasonic welding is beneficial to reducing damage to the tab 400.

[0061] In the related art, a battery includes a housing, a core, a tab, and a cover plate. The core and tab are arranged inside the housing, and the cover plate covers the open end of the housing. The tab is connected to the core. Due to the limited space under the cover plate, the tab often bends. The bent tab easily wastes the space under the cover plate, reducing space utilization. Overly crowded tab bending also increases the risk of tab contact with the core, thereby causing a short circuit. According to the tab lead-out tab 10 of the embodiment of the present application, by designing the tab connection portion 2 to protrude toward one side of the pole connection portion 1, after the tab 400 is connected to the tab connection portion 2, the tab 400 also protrudes toward one side of the pole connection portion 1 without occupying too much space on the other side of the pole connection portion 1. This facilitates the installation of the core 300 in the space on the other side of the pole connection portion 1, which is conducive to improving space utilization. In addition, the tab 400 is not easily bent in the space on the other side of the pole connection portion 1, reducing the risk of the tab 400 contacting other cores 300 and causing a short circuit.

[0062] In some embodiments of the present application, there are multiple tab connection parts 2, or multiple pole connection parts 1, and the tab connection parts 2 and the pole connection parts 1 are connected to form an integrated lead-out piece.

[0063] In some embodiments, as Figure 1-Figure 2As shown, there are multiple tab connections 2 and multiple post connections 1. For example, there are three tab connections 2 and three post connections 1. The post connection 1 is used to fix the post 30, and the tab connection 2 is used to connect the tab 400. The tab lead-out piece 10 having multiple tab connections 2 and multiple post connections 1 is suitable for a battery 1000 having multiple tabs 400 and multiple posts 30. The design of the integrated tab lead-out piece 10 of this embodiment is suitable for draining multiple posts 30 and multiple tabs 400, exponentially increasing the connection area of ​​the tab 400 and the current-carrying area of ​​the post 30, and also improving the high current load capacity of the core 300, which is conducive to the use of ultra-high capacity long batteries 1000.

[0064] In some embodiments not shown in the figures, there is one tab connection 2 and two pole connection parts 1, and the tab connection part 2 is connected between the two pole connection parts 1; or, there are two tab connection parts 2 and one pole connection part 1, and the pole connection part 1 is connected between the two tab connection parts 2.

[0065] Optionally, the tab connection portion 2 is connected to the pole connection portion 1 in a first direction (ie, X direction).

[0066] Optionally, the tab connection parts 2 and the pole connection parts 1 can be alternately connected in the first direction. In a specific embodiment, the number of the tab connection parts 2 and the pole connection parts 1 is equal or the number thereof differs by 1, ensuring that the tab connection parts 2 and the pole connection parts 1 can be alternately connected.

[0067] Alternatively, the connection between the tab connection portion 2 and the pole connection portion 1 may be such that the tab connection portion 2 is in the middle region and the pole connection portions 1 are at both ends of the tab connection portion 2 region.

[0068] Different from the related art in which improvements are made to the size of the pole tab 400 to improve the current carrying capacity, the present application starts from the number of the pole tabs 400. The pole tab lead-out sheet 10 of the present application is an integrated lead-out sheet, including multiple pole tab connecting parts 2 and / or multiple pole column connecting parts 1, which are used to increase the number of pole tabs 400 and / or pole columns 30, and can proportionally increase the current carrying capacity, improve the charging rate of the pole core 300 and the performance of the pole core 300, and facilitate the capacity stacking of the ultra-long pole sheets of the pole core 300, thereby synergistically improving the capacity of the battery 1000 single body.

[0069] In some embodiments of the present application, reference is made to Figures 1-4 As shown, the tab connection portion 2 has a first side surface 21 and a second side surface 22, which are arranged opposite to each other. The side of the first side surface 21 facing away from the second side surface 22 forms an extraction cavity 3, which is used for the tab 400 to pass through. The first side surface 21 is used to connect the tab 400. The large area of ​​the first side surface 21 makes the connection between the tab 400 and the tab connection portion 2 more secure.

[0070] In some embodiments of the present application, reference is made to Figures 1-4 As shown, the tab connection portion 2 is connected to the pole connection portion 1 in a first direction (i.e., X direction), the tab connection portion 2 protrudes in a second direction (i.e., Y direction) relative to the pole connection portion 1, and the tab connection portion 2 is recessed in a third direction (i.e., Z direction) relative to the adjacent pole connection portion 1 to form a lead-out cavity 3, and the first direction, the second direction, and the third direction are perpendicular to each other, that is, the X direction, the Y direction, and the Z direction are perpendicular to each other.

[0071] In some embodiments of the present application, reference is made to Figures 1-4 As shown, the pole connecting portion 1 is a sheet-like structure, and the side of the pole connecting portion 1 with a larger area is arranged opposite to the pole core 300 of the battery 1000, which will not significantly increase the size of the battery 1000.

[0072] In some embodiments of the present application, reference is made to Figure 1 As shown, the tab connection 2 is configured as a plate-like structure.

[0073] In some embodiments of the present application, reference is made to Figure 2-Figure 4 As shown, the tab connection portion 2 is constructed as a boss. The tab connection portion 2 also has a connecting portion top surface 23 connecting the first side surface 21 and the second side surface 22. The connecting portion top surface 23 is used to connect to the tab 400. In other words, the tab 400 can be connected to both the first side surface 21 and the connecting portion top surface 23. The boss design can increase the strength of the tab lead 10 and increase the welding area and current-carrying cross-sectional area of ​​the tab 400, thereby significantly improving the current carrying capacity.

[0074] In some embodiments of the present application, reference is made to Figures 1-4 、 Figure 6 As shown, the pole connecting portion 1 is provided with a pole connecting hole 11, which is used to connect the pole 30. Specifically, one end of the pole 30 is embedded in the pole connecting hole 11 to achieve positioning of the pole 30 by the pole connecting portion 1. At the same time, the pole 30 is welded to the hole wall of the pole connecting hole 11 to achieve fixation of the pole 30 on the pole connecting portion 1.

[0075] Reference Figure 5-Figure 6 、 Figures 9-12 、 Figure 15As shown, the cover plate assembly 100 according to the second embodiment of the present application includes a cover plate 20, a pole 30, a cap 40, and the tab lead-out piece 10 of the above embodiment. The cover plate 20 is located on one side of the tab lead-out piece 10, the pole 30 is provided on the cover plate 20, and the pole 30 is connected and fixed to the pole connecting portion 1. The cover plate 20 is provided with a cap hole 201, and the cap 40 is provided in the cap hole 201. The cap 40 protrudes to the side away from the tab lead-out piece 10. A cap cavity 401 is formed in the cap 40 that is connected to the cap hole 201. The tab connecting portion 2 at least partially extends into the cap cavity 401 through the cap hole 201. After the tab 400 is connected to the tab connecting portion 2, the tab 400 will also extend into the cap cavity 401. In this way, the tab 400 will not occupy too much space on the other side of the pole connecting portion 1. The cap 40 provides external space and protection for the tab 400 , while also providing an airflow channel so that the gas in the battery 1000 is collected in the cap cavity 401 , thereby slowing down the expansion of the gas.

[0076] Specifically, the tab connection portion 2 passes through the cap hole 201 , and the gap between the first side surface 21 of the tab connection portion 2 and the hole wall of the cap hole 201 is the lead-out cavity 3 . The tab 400 passes through the lead-out cavity 3 and extends into the cap cavity 401 .

[0077] Reference Figure 9 As shown, the tab connection portion 2 is partially higher than the outer surface of the cover plate 20 and lower than the inner top surface of the cap 40 in the Y direction, so that the tab connection portion 2 is at least partially located in the cap cavity 401. The portion where the tab 400 connects to the tab connection portion 2 is also at least partially located in the cap cavity 401. The tab 400 enters the cap cavity 401 from the interior of the housing 200 in the Y direction through the gap on the side of the corresponding first side 21 (i.e., the lead-out cavity 3). The tab 400 is located in the cap cavity 401 on the side of the first side 21 of the tab connection portion 2. The tab 400 is welded or bonded closely to the first side 21 of the tab connection portion 2, i.e., the first side 21 serves as the connection surface. The connection area between the tab 400 and the tab connection portion 2 is less than or equal to the area of ​​the first side 21. The connection portion between the tab 400 and the tab connection portion 2 is completely or partially located in the cap cavity 401 formed by the outer side of the cover plate 20 and the cap 40.

[0078] According to the cover plate assembly 100 of the embodiment of the present application, by designing the pole tab connection part 2 of the pole tab lead-out piece 10 to protrude toward one side of the pole connection part 1 and extend into the cap cavity 401, it is possible to make the pole tab 400 also protrude toward one side of the pole connection part 1 after the pole tab 400 is connected to the pole tab connection part 2 without occupying too much space on the other side of the pole connection part 1, making it convenient to install the pole core 300 in the space on the other side of the pole connection part 1, which is beneficial to improving space utilization, and the pole tab 400 is not easy to bend in the space on the other side of the pole connection part 1, reducing the risk of short circuit caused by contact between the pole tab 400 and other pole cores 300.

[0079] In some embodiments of the present application, reference is made to Figure 3-Figure 6 、 Figures 9-12 、 Figure 15 As shown, a pole hole 202 is provided on the cover plate 20, and the pole hole 202 is a through hole. The pole 30 is connected and fixed to the pole connecting part 1 after passing through the pole hole 202. The pole hole 202 and the cap hole 201 are arranged at intervals in the first direction. In this way, the pole 30 and the cap 40 are arranged at intervals in the first direction.

[0080] In some embodiments of the present application, reference is made to Figure 6-Figure 8 As shown, the cap hole 201 is a stepped through hole. The cap hole 201 includes a small diameter portion 2011 and a large diameter portion 2012. The large diameter portion 2012 connects to the end of the small diameter portion 2011 away from the tab lead 10. A stepped surface 2013 is formed between the large diameter portion 2012 and the small diameter portion 2011. The cap 40 includes a cap body 402 and a cap edge 403. The cap cavity 401 is formed within the cap body 402. The cap edge 403 protrudes outward from the outer periphery of the cap body 402 and is fixed to the stepped surface 2013. The stepped surface 2013 is recessed downward relative to the upper surface of the cover plate 20. After the cap edge 403 is fixed to the stepped surface 2013, the space in the thickness direction of the cover plate 20 can be fully utilized, making the structure of the cover plate assembly 100 more compact. The cap 40 has a cover-like structure that is concave at the bottom and convex at the top. The cap 40 covers the stepped hollow structure (i.e., the cap hole 201 ) of the cover plate 20 . The cap cavity 401 provides space for the tab 400 to be connected externally.

[0081] In the plane projection perpendicular to the cover plate 20 , the projection of the small diameter portion 2011 is within the projection range of the large diameter portion 2012 , so that a step surface 2013 of a certain width is formed between the large diameter portion 2012 and the small diameter portion 2011 , which effectively stops and limits the cap edge 403 .

[0082] Optionally, the cap hole 201 may be a square hole, a circular hole, etc.

[0083] In some embodiments of the present application, M poles 30 form a pole group, and N caps 40 form a cap group, where M and N are both positive integers, and the pole groups and cap groups are arranged alternately. They can be arranged along one row, or along two rows, or along more rows. Optionally, M can be 1, 2, 3, 4, etc., and N can be 1, 2, 3, 4, etc. Figure 16 In the example shown, M=1, N=1, and one pole 30 and one cap 40 are arranged alternately. Figure 17 In the example shown, two poles 30 are provided between two adjacent caps 40. For example, two poles 30 and one cap 40 may be arranged alternately. Figure 18 In the example shown, the poles 30 and caps 40 are arranged in two rows. In each row, two caps 40 are provided between two adjacent poles 30. For example, one pole 30 and two caps 40 may be arranged alternately. The poles 30 and caps 40 may be arranged in the X direction, the Z direction, or other directions. The arrangement and number of poles 30 and caps 40 are not limited to Figure 16-Figure 18 As shown in , optionally, a pole 30 and a cap 40 are selected and arranged alternately in a row along the length direction (X direction) of the battery 1000, and the length direction of the cap 40 is consistent with the X direction to reduce the contact between the cap 40 and the tab 400 and increase the connection length of a single tab 400 in the cap 40.

[0084] In some embodiments of the present application, the cover plate 20 is provided with a positive electrode post hole; and / or, the cover plate 20 is provided with a negative electrode post hole. Specifically, when the cover plate assembly 100 is a positive electrode cover plate assembly 100a, refer to Figure 10-11 As shown, the cover plate 20 is a positive cover plate 20a, and a positive electrode post hole is provided on the positive cover plate 20a. The positive electrode cover plate 20a is also provided with a liquid injection hole 203. The positive electrode tab 400a is connected to the tab connection part 2 of the positive cover plate assembly 100a, and the positive electrode post 30a is connected to the post connection part 1 of the positive cover plate assembly 100a. When the cover plate assembly 100 is a negative cover plate assembly 100b, refer to Figure 10 、 Figure 12 As shown, the cover plate 20 is a negative electrode cover plate 20b, which is provided with a negative electrode post hole and an explosion-proof valve 204. The negative electrode tab 400b is connected to the tab connection portion 2 of the negative electrode cover plate assembly 100b, and the negative electrode post 30b is connected to the post connection portion 1 of the negative electrode cover plate assembly 100b. In some embodiments not shown in the figures, the cover plate 20 is provided with a positive electrode post hole, a negative electrode post hole, a liquid injection hole 203, and an explosion-proof valve 204. The positive electrode tab 400a and the negative electrode tab 400b are both connected to the corresponding tab connection portion 2 of the cover plate assembly 100. The positive electrode post 30a is installed in the positive electrode post hole, and the negative electrode post 30b is installed in the negative electrode post hole. The positive electrode post 30a and the negative electrode post 30b are both connected to the corresponding post connection portion 1 of the cover plate assembly 100.

[0085] Optionally, the cover plate 20 and the cover cap 40 can be made of metals such as aluminum and copper, or rubbers such as silicone rubber, chloroprene rubber, and nitrile rubber, or plastics such as PE (polyethylene), PET (polyethylene glycol terephthalate), and PA (polyamide fiber), or composite materials such as aluminum-plastic shells. Aluminum metal materials have good heat dissipation performance.

[0086] In some embodiments of the present application, on the same cover plate assembly 100 , the relationship between the number P of poles 30 and the number Q of caps 40 is: 1<P / Q<5, so that one or more poles 30 correspond to one cap 40 to ensure the overcurrent requirement of the poles 30.

[0087] Reference Figure 5-Figure 6 、 Figures 9-15 As shown, a battery 1000 according to an embodiment of the third aspect of the present application includes a housing 200, a core 300, and the cover plate assembly 100 of the above embodiment. The housing 200 has an installation space, at least one end of the housing 200 is an open end, the cover plate assembly 100 is disposed at the open end, and the core 300 is disposed in the installation space. The core 300 is located on the side of the tab lead-out sheet 10 facing away from the cover plate 20. The core 300 has a tab 400, which at least partially extends into the cap cavity 401 through the cap hole 201 and is fixedly connected to the tab connection portion 2. The core 300 enters the interior of the housing 200 from the open end of the housing 200 and is stacked along the thickness direction (Z direction) of the housing 200.

[0088] Different from the solution in the related art that increases the arrangement density and utilization rate within the shell 200, the present application introduces a cap 40 structure starting from the outside of the shell 200. The cap 40 protrudes toward the side away from the tab lead-out sheet 10, that is, the cap 40 protrudes in the direction away from the pole core 300. The cap 40 contains a cap cavity 401 inside, which is used to accommodate the tab 400 led into the cap cavity 401. This increases the space occupied by the pole core 300 within the shell 200, fully utilizes the external space at the height of the pole column 30, and can improve space utilization without affecting the volume of the battery 1000.

[0089] Figure 13 This is a three-dimensional schematic diagram of the electrode core 300 and the electrode tab 400. The electrode core 300 can be stacked or rolled. The electrode core 300 includes a negative electrode sheet and a positive electrode sheet. The negative electrode tab 400b of the negative electrode sheet is evenly distributed on one side of the electrode core 300, and the positive electrode tab 400a of the positive electrode sheet is evenly distributed on the other side of the electrode core 300. The number of negative electrode tabs 400b and the number of positive electrode tabs 400a are both multiple.

[0090] The negative electrode plate and the positive electrode plate are separated by a separator. Optionally, the separator is made of PP (polypropylene) / PE or other organic polymers.

[0091] According to the battery 1000 of the embodiment of the present application, by designing the tab connection part 2 of the tab lead-out sheet 10 to protrude toward one side of the pole connection part 1 and extend into the cap cavity 401, it is possible to make it possible for the tab 400 to also protrude toward one side of the pole connection part 1 and extend into the cap cavity 401 after the tab 400 is connected to the tab connection part 2 without occupying too much installation space in the shell 200, making it convenient to install the pole core 300 in the installation space on the other side of the pole connection part 1, which is beneficial to improving space utilization, and the tab 400 is not easy to bend in the installation space, reducing the risk of short circuit caused by contact between the tab 400 and other pole cores 300.

[0092] In some embodiments of the present application, reference is made to Figure 10-12 、 Figure 15 As shown, the housing 200 has a first open end and a second open end. There are two cover plate assemblies 100, one of which is a positive electrode cover plate assembly 100a and the other is a negative electrode cover plate assembly 100b. The positive electrode cover plate assembly 100a is arranged at the first open end. The positive electrode cover plate 20a of the positive electrode cover plate assembly 100a is provided with a positive electrode post hole and a liquid injection hole 203. The positive electrode post 30a is installed in the positive electrode post hole. The negative electrode cover plate assembly 100b is arranged at the second open end. The negative electrode cover plate 20b of the negative electrode cover plate assembly 100b is provided with a negative electrode post hole and an explosion-proof valve 204. The negative electrode post 30b is installed in the negative electrode post hole. The tabs 400 include a positive tab 400a and a negative tab 400b. The positive tab 400a is fixedly connected to the tab connection portion 2 of the positive electrode cover plate assembly 100a, and the negative tab 400b is fixedly connected to the tab connection portion 2 of the negative electrode cover plate assembly 100b.

[0093] In some embodiments of the present application, the length of the housing 200 is greater than the width of the housing 200 and the thickness of the housing 200, and the housing 200 is a rectangular parallelepiped. Figure 5 、 Figure 10 and Figure 15 , the length of the shell 200 is Lk, the width of the shell 200 is Wk, and the thickness of the shell 200 is Hk, Lk>Wk>Hk. Optionally, the positive cover plate assembly 100a and the negative cover plate assembly 100b are arranged at both ends of the length direction of the shell 200, such as Figure 15 As shown, in the X direction, the positive electrode cover plate assembly 100a and the negative electrode cover plate assembly 100b are arranged at both ends of the housing 200; or alternatively, the positive electrode cover plate assembly 100a and the negative electrode cover plate assembly 100b are arranged at both ends in the width direction of the housing 200, as shown in FIG. Figure 10As shown, in the Y direction, the positive electrode cover plate assembly 100a and the negative electrode cover plate assembly 100b are arranged at both ends of the housing 200. In this way, the battery 1000 is relatively small in the thickness direction of the housing 200. In addition, the terminal 30 is led out from the narrow surface (surface parallel to the XZ plane or YZ plane) of the housing 200, rather than the large surface (surface parallel to the XY plane).

[0094] In some embodiments of the present application, the length Lk of the housing 200 ranges from 100 mm to 6000 mm, the length Lk and width Wk of the housing 200 satisfy the relationship Lk / Wk = 3 to 100, and the thickness Hk of the housing 200 ranges from Hk > 20 mm. For example, Lk can be 100 mm, 500 mm, 1000 mm, 3000 mm, 5000 mm, 6000 mm, etc., Lk / Wk can be 3, 10, 30, 50, 80, 100, etc., and Hk can be 30 mm, 40 mm, 50 mm, etc.

[0095] Figure 5-Figure 6 、 Figure 9 、 Figure 12 The illustrated cover plate assembly 100 is a negative electrode cover plate assembly 100b. The cover plate 20 is provided with a plurality of electrode holes 202, a plurality of cap holes 201, and an explosion-proof valve 204. The negative electrode posts 30b are mounted in the electrode holes 202, and the negative caps 40b are mounted in the cap holes 201. The negative electrode posts 30b and the negative caps 40b are arranged alternately on the surface of the negative electrode cover plate 20b. The negative electrode posts 30b and the explosion-proof valve 204 protrude from the outer side of the negative electrode cover plate 20b. Similarly, Figure 11 The cover plate assembly 100 shown is a positive electrode cover plate assembly 100a. The cover plate 20 of the positive electrode cover plate assembly 100a is provided with multiple pole holes 202, multiple cap holes 201 and an injection hole 203. The positive electrode 30a is installed in the pole hole 202, and the positive cap 40a is installed in the cap hole 201. The positive electrode 30a and the positive cap 40a are arranged in an orderly and alternating manner on the surface of the positive electrode cover plate 20a.

[0096] In some embodiments of the present application (not shown in the figures), the housing 200 has an open end, the cover plate assembly 100 is arranged at the open end, the cover plate 20 is provided with a positive pole post hole, a negative pole post hole, a liquid injection hole 203 and an explosion-proof valve 204, the tab 400 includes a positive pole tab 400a and a negative pole tab 400b, there are multiple tab connection parts 2, and the positive pole tab 400a and the negative pole tab 400b are connected and fixed to different tab connection parts 2. The housing 200 is a cylindrical structure with one end open, and the positive pole tab 400a and the negative pole tab 400b are both led out from the same end of the pole core 300, which facilitates all connection operations to be completed at the same end of the housing 200.

[0097] An overcrowded space below the cover plate 20 can hinder the flow of gases generated by the pole core 300 during cycling, rendering the explosion-proof valve 204 ineffective in sensitively preventing explosions and reducing the safety of the battery 1000. By extending the pole tab 400 at least partially into the cap cavity 401 through the cap hole 201, the pole tab 400 does not occupy excessive installation space within the housing 200, providing ample airflow for the pole core 300 within the installation space. This allows for smooth flow of gases generated by the pole core 300 during cycling, ensuring that the explosion-proof valve 204 can be sensitively prevented from explosions, thereby improving the safety of the battery 1000.

[0098] In some embodiments of the present application, after the tab 400 is connected and fixed to the tab connection portion 2, an insulating layer is coated on the outside of the tab 400 and the tab connection portion 2. By wrapping with the insulating layer, either the tab 400 or the tab connection portion 2 can be insulated from the edge of the cap hole 201 and the inner top surface of the cap 40. Optionally, the insulating layer can be insulating glue, insulating rubber, insulating silicone, etc.

[0099] In some embodiments of the present application, the tab connection portion 2 and the pole connection portion 1 are alternately connected in the first direction, the length of the tab 400 is less than the length of the tab connection portion 2, and in the first direction, the length of the tab connection portion 2 and the length of the tab 400 satisfy the relationship: 0.5 < length of the tab 400 / length of the tab connection portion 2 < 0.95. Figure 1-Figure 2 、 Figure 4 As shown, the length of the tab connection portion 2 is Lb, the length of the tab 400 is Lr, and 0.5<Lr / Lb<0.95. When Lr / Lb≤0.5, the connection length between the tab 400 and the tab connection portion 2 is short, and the connection strength is poor. When Lr / Lb≥0.95, the tab 400 is easily misaligned when fitting with the tab connection portion 2, resulting in a portion of the tab 400 being unable to fit with the tab connection portion 2 in the length direction. Setting 0.5<Lr / Lb<0.95 allows the tab 400 to be better connected to the tab connection portion 2 in the first direction, and the connection strength is higher.

[0100] In some embodiments of the present application, reference is made to Figure 13 As shown, the length of the electrode core 300 is L, the length of the electrode tab 400 is Lr, and the number of electrode tabs 400 is n, where n is a natural number. L, Lr, and n satisfy the relationship: 0 < n * Lr / L < 1. In other words, the total length of all electrode tabs 400 at one end of the electrode core 300 is less than the length of the electrode core 300.

[0101] In some embodiments of the present application, reference is made to Figure 13 As shown, the height of the tab 400 protruding from the electrode core 300 toward the cover plate assembly 100 is h, the thickness of the electrode core 300 is H, and h and H satisfy the relationship: 0<h / H<0.5.

[0102] Optionally, the tab lead-out piece 10 is made of aluminum or copper.

[0103] Optionally, the tab 400 is made of aluminum or copper.

[0104] In some embodiments of the present application, the tab lead-out piece 10 of the positive electrode cover plate assembly 100a and the positive electrode tab 400a are made of aluminum, and the tab lead-out piece 10 of the negative electrode cover plate assembly 100b and the negative electrode tab 400b are made of copper.

[0105] Reference Figure 19 As shown, the electric device 10000 according to the fourth embodiment of the present application includes the battery 1000 of the above embodiment.

[0106] According to the electrical equipment 10000 of the embodiment of the present application, by designing the pole tab connection part 2 of the pole tab lead-out piece 10 to protrude toward one side of the pole connection part 1 and extend into the cap cavity 401, after the pole tab 400 is connected to the pole tab connection part 2, the pole tab 400 also protrudes toward one side of the pole connection part 1 and extends into the cap cavity 401 without occupying too much installation space in the shell 200, making it convenient to install the pole core 300 in the installation space on the other side of the pole connection part 1, which is beneficial to improving space utilization, and the pole tab 400 is not easy to bend in the installation space, reducing the risk of short circuit caused by contact between the pole tab 400 and other pole cores 300.

[0107] Optionally, the electrical equipment 10000 may be electrical equipment 10000, a ship, an airplane, a machine tool, a household appliance, etc.

[0108] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0109] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0110] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0111] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A tab lead-out sheet, characterized in that: include: A pole connecting portion (1), the pole connecting portion (1) being used to connect a pole (30); and A pole lug connection portion (2), the pole lug connection portion (2) being used to connect the pole lug (400), the pole lug connection portion (2) being connected to the pole column connection portion (1), the pole lug connection portion (2) protruding toward one side of the pole column connection portion (1) relative to the pole column connection portion (1).

2. The tab lead-out sheet according to claim 1, characterized in that: There are multiple pole lug connection parts (2) or multiple pole column connection parts (1).

3. The tab lead-out sheet according to claim 2, characterized in that: The pole lug connection portion (2) is connected to the pole column connection portion (1) in a first direction.

4. The tab lead-out sheet according to claim 1, characterized in that: The pole lug connecting portion (2) comprises a first side surface (21) and a second side surface (22) arranged opposite to each other, a side of the first side surface (21) facing away from the second side surface (22) forms a lead-out cavity (3) for the pole lug (400) to pass through, and the first side surface (21) is used to connect the pole lug (400).

5. The tab lead-out piece according to claim 4, characterized in that: The pole lug connection portion (2) is connected to the pole column connection portion (1) in a first direction, the pole lug connection portion (2) protrudes in a second direction relative to the pole column connection portion (1), and the pole lug connection portion (2) is recessed in a third direction relative to the adjacent pole column connection portion (1) to form the lead-out cavity (3), and the first direction, the second direction and the third direction are perpendicular to each other.

6. The tab lead-out piece according to claim 4 or 5, characterized in that: The pole tab connection portion (2) is configured as a sheet-like structure.

7. The tab lead-out piece according to claim 4 or 5, characterized in that: The pole lug connection portion (2) is configured as a boss, and the pole lug connection portion (2) further comprises a connection portion top surface (23) connecting the first side surface (21) and the second side surface (22), and the connection portion top surface (23) is used for connecting the pole lug (400).

8. The tab lead-out sheet according to claim 1, characterized in that: The pole connecting portion (1) is provided with a pole connecting hole (11) for connecting a pole (30).

9. A cover plate assembly, characterized in that: include: The tab lead-out sheet according to any one of claims 1 to 8; A cover plate (20), a pole (30) and a cap (40), wherein the cover plate (20) is located on one side of the pole tab lead-out piece, the pole (30) is arranged on the cover plate (20) and is connected and fixed to the pole tab connecting portion (1), a cap hole (201) is provided on the cover plate (20), the cap (40) is arranged in the cap hole (201) and protrudes toward a side away from the pole tab lead-out piece, a cap cavity (401) communicating with the cap hole (201) is formed in the cap (40), and the pole tab connecting portion (2) at least partially extends into the cap cavity (401) through the cap hole (201).

10. The cover plate assembly according to claim 9, characterized in that: The cover plate (20) is provided with a pole hole (202), the pole (30) is connected and fixed to the pole connecting portion (1) after passing through the pole hole (202), and the pole hole (202) and the cap hole (201) are arranged at intervals in a first direction.

11. The cover plate assembly according to claim 9, characterized in that: The cap hole (201) includes a small diameter portion (2011) and a large diameter portion (2012), the large diameter portion (2012) is connected to an end of the small diameter portion (2011) away from the tab lead-out plate, a step surface (2013) is formed between the large diameter portion (2012) and the small diameter portion (2011), the cap (40) includes a cap body (402) and a cap edge (403), the cap cavity (401) is formed in the cap body (402), the cap edge (403) protrudes outward from the outer circumference of the cap body (402), and the cap edge (403) is fixed to the step surface (2013).

12. The cover plate assembly according to claim 9, characterized in that: M poles (30) form a pole group, and N caps (40) form a cap group, M and N are both positive integers, and the pole group and the cap group are arranged alternately.

13. The cover plate assembly according to claim 9, characterized in that: The cover plate (20) is provided with a positive pole post hole; and / or the cover plate (20) is provided with a negative pole post hole.

14. A battery, characterized in that: include: A housing (200), wherein the housing (200) has an installation space therein, and at least one end of the housing (200) is an open end; The cover plate assembly of any one of claims 9 to 12, wherein the cover plate assembly is disposed at the open end; and A pole core (300), the pole core (300) being arranged in the installation space, the pole core (300) being located on a side of the pole tab lead-out sheet facing away from the cover plate (20), the pole core (300) having a pole tab (400), the pole tab (400) at least partially extending into the cap cavity (401) through the cap hole (201) and being connected and fixed to the pole tab connecting portion (2).

15. The battery according to claim 14, characterized in that The shell (200) has a first open end and a second open end. There are two cover plate assemblies, one of which is a positive cover plate assembly (100a) and the other is a negative cover plate assembly (100b). The positive cover plate assembly (100a) is arranged at the first open end. The cover plate (20) of the positive cover plate assembly (100a) is provided with a positive pole column hole. The negative cover plate assembly (100b) is arranged at the second open end. The cover plate (20) of the negative cover plate assembly (100b) is provided with a negative pole column hole. The pole lug (400) includes a positive pole lug (400a) and a negative pole lug (400b). The positive pole lug (400a) is connected and fixed to the pole lug connecting portion (2) of the positive cover plate assembly (100a), and the negative pole lug (400b) is connected and fixed to the pole lug connecting portion (2) of the negative cover plate assembly (100b).

16. The battery according to claim 15, characterized in that The length of the shell (200)>the width of the shell (200)>the thickness of the shell (200); The positive electrode cover plate assembly (100a) and the negative electrode cover plate assembly (100b) are arranged at two ends of the shell (200) in the length direction, or the positive electrode cover plate assembly (100a) and the negative electrode cover plate assembly (100b) are arranged at two ends of the shell (200) in the width direction.

17. The battery according to claim 14, characterized in that The shell (200) has an open end, the cover plate (20) is provided with a positive pole column hole and a negative pole column hole, the pole lug (400) comprises a positive pole lug (400a) and a negative pole lug (400b), there are a plurality of pole lug connecting portions (2), and the positive pole lug (400a) and the negative pole lug (400b) are connected and fixed to different pole lug connecting portions (2).

18. The battery according to any one of claims 14 to 17, characterized in that After the pole tab (400) and the pole tab connecting portion (2) are connected and fixed, an insulating layer is coated on the outside of the pole tab (400) and the pole tab connecting portion (2).

19. The battery according to any one of claims 14 to 17, characterized in that: The pole lug connection portion (2) and the pole column connection portion (1) are alternately connected in a first direction. In the first direction, the length of the pole lug connection portion (2) and the length of the pole lug (400) satisfy the relationship: 0.5<the length of the pole lug (400) / the length of the pole lug connection portion (2)<0.

95.

20. The battery according to any one of claims 14 to 17, characterized in that The length of the pole core (300) is L, the length of the pole lug (400) is Lr, the number of the pole lugs (400) is n, and L, Lr, and n satisfy the relationship: 0<n*Lr / L<1.

21. The battery according to any one of claims 14 to 17, characterized in that The height of the pole lug (400) protruding from the pole core (300) toward the cover plate assembly is h, the thickness of the pole core (300) is H, and h and H satisfy the relationship: 0<h / H<0.

5.

22. An electrical equipment, characterized in that: A battery comprising the battery of any one of claims 14-21.

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