Tab lead-out sheet, cover plate assembly, battery, and electric device

Abstract

The application discloses a tab lead-out sheet, a cover plate assembly, a battery and an electric device, and relates to the technical field of batteries. The tab lead-out sheet 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 to 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 to one side of the pole connecting part, so that after the tab is connected with the tab connecting part, the tab also protrudes to one side of the pole connecting part, without occupying too much space on the other side of the pole connecting part, facilitating the installation of a pole core on the other side of the pole connecting part, improving the space utilization rate, and reducing the risk of short circuit caused by the contact between the tab and other pole cores.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a tab lead-out sheet, a cover plate assembly, a battery and an electric device. BACKGROUND

[0002] In the related art, a battery includes a shell, a pole core, a tab and a cover plate, etc. The pole core and the tab are arranged inside the shell, and the cover plate covers the open end of the shell. The tab is connected with the pole core. Since the space below the cover plate is limited, the tab is often bent. The bent tab is easy to cause the space below the cover plate to be wasted, thereby reducing the space utilization. The too crowded tab bending also increases the risk of contact between the tab and the pole core, thereby causing a short circuit. Therefore, there is room for improvement. SUMMARY

[0003] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a tab lead-out sheet, which makes the tab not occupy too much space of the pole core.

[0004] The present application also provides a cover plate assembly with the above tab lead-out sheet.

[0005] The present application also provides a battery with the above cover plate assembly.

[0006] The present application also provides an electric device with the above battery.

[0007] The tab lead-out sheet according to the embodiments of the present application includes a pole column connecting part and a tab connecting part. The pole column connecting part is used to connect a pole column. The tab connecting part is used to connect a tab. The tab connecting part is connected with the pole column connecting part. The tab connecting part protrudes to one side of the pole column connecting part relative to the pole column connecting part.

[0008] According to the tab lead-out sheet of the embodiments of the present application, by designing the tab connecting part to protrude to one side of the pole column connecting part, after the tab is connected with the tab connecting part, the tab also protrudes to one side of the pole column connecting part, without occupying too much space on the other side of the pole column connecting part. This facilitates the installation of the pole core in the space on the other side of the pole column connecting part, is conducive to improving the space utilization, and reduces the risk of the tab being bent in the space on the other side of the pole column connecting part and contacting other pole cores to cause a short circuit.

[0009] According to some embodiments of the present application, the tab connecting part is a plurality of or the pole column connecting part is a plurality of.

[0010] According to some embodiments of the present application, the tab connecting part and the pole column connecting part are connected in a first direction.

[0011] According to some embodiments of the present application, the tab connecting portion has a first side and a second side arranged oppositely, and a side of the first side away from the second side forms a lead-out cavity for a tab to pass through, and the first side is used for connecting a tab.

[0012] According to some embodiments of the present application, the tab connecting portion is connected with the pole connecting portion in a first direction, the tab connecting portion protrudes in a second direction relative to the pole connecting portion, and the tab connecting portion is recessed in a third direction relative to the adjacent pole connecting 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 connecting portion is configured as a sheet structure.

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

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

[0016] According to the cover plate assembly of the second aspect of the embodiments of the present application, the cover plate is located on one side of the tab lead-out sheet, the pole is arranged on the cover plate and connected and fixed with the pole connecting portion, the cover plate is provided with a cap hole, the cap is arranged in the cap hole and protrudes away from the side of the tab lead-out sheet, the cap forms a cap cavity in communication with the cap hole, and the tab connecting portion at least partially extends into the cap cavity through the cap hole.

[0017] According to the cover plate assembly of the embodiments of the present application, by designing the tab connecting portion of the tab lead-out sheet to protrude to one side of the pole connecting portion and extend into the cap cavity, after the tab is connected with the tab connecting portion, the tab also protrudes to one side of the pole connecting portion, without occupying too much space on the other side of the pole connecting portion, facilitating the installation of the pole core on the other side of the pole connecting portion, improving the space utilization, and reducing the risk of the tab being bent on the other side of the pole connecting portion and contacting other pole cores to cause short circuit.

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

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

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

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

[0022] The battery according to the third aspect of the embodiments of the present application comprises a shell, a pole core, and the cover plate assembly described above, the shell has a mounting space inside, 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 mounting space, the pole core is located on the side of the tab lead-out piece away from the cover plate, the pole core has a tab, the tab at least partially extends into the cap cavity through the cap hole and is connected and fixed with the tab connecting portion.

[0023] The battery according to the embodiments of the present application can make the tab also protrude to one side of the pole column connecting portion and extend into the cap cavity after the tab is connected with the tab connecting portion, without occupying too much mounting space inside the shell, facilitating the installation of the pole core in the mounting space on the other side of the pole column connecting portion, being conducive to improving the space utilization rate, and the tab is not easy to be bent in the mounting space, reducing the risk of short circuit caused by the 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, the cover plate assembly comprises two cover plate assemblies, one of which is a positive cover plate assembly and the other of which is a negative cover plate assembly, the positive cover plate assembly is arranged at the first open end, the cover plate of the positive cover plate assembly is provided with a positive pole column hole, the negative cover plate assembly is arranged at the second open end, the cover plate of the negative cover plate assembly is provided with a negative pole column hole, the tab comprises a positive tab and a negative tab, the positive tab is connected and fixed with the tab connecting portion of the positive cover plate assembly, and the negative tab is connected and fixed with the tab connecting portion of the negative cover plate assembly.

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

[0026] According to some embodiments of the present application, the shell has an open end, the cover plate is provided with positive electrode post holes and negative electrode post holes, the tabs include positive electrode tabs and negative electrode tabs, the tab connecting portions are multiple, and the positive electrode tabs and the negative electrode tabs are fixedly connected to different tab connecting portions.

[0027] According to some embodiments of the present application, after the tabs are fixedly connected to the tab connecting portions, the tabs and the tab connecting portions are externally covered with an insulating layer.

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

[0029] According to some embodiments of the present application, the length of the pole core is L, the length of the tab is Lr, and the number of the tabs 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 to the cover plate assembly is h, and the thickness of the pole core is H, and h and H satisfy the relationship: 0 < h / H < 0.5.

[0031] The power consumption device according to the fourth aspect of the present application comprises the battery described above.

[0032] According to the power consumption device of the present application, the tab connecting portion of the tab lead-out piece is designed to protrude to one side of the post connecting portion and extend into the cap cavity, so that after the tab is connected to the tab connecting portion, the tab also protrudes to one side of the post connecting portion and extends into the cap cavity, without occupying too much installation space in the shell, facilitating the installation of the pole core in the installation space on the other side of the post connecting portion, improving the space utilization, and reducing the risk of short circuit caused by the contact between the tab and other pole cores.

[0033] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1This is a schematic diagram of a tab lead-out sheet according to an embodiment of this application;

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

[0036] Figure 3 It is the cover plate, the electrode lug and Figure 2 The diagram shows the connection of the electrode lead-out piece;

[0037] Figure 4 It is the cover plate, the electrode lug and Figure 2 The diagram shows an explosion of the electrode lead-out piece;

[0038] Figure 5 This is a perspective view of a battery according to an embodiment of this application;

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

[0040] Figure 7 yes Figure 6 A magnified view of a portion of point A in the middle;

[0041] Figure 8 This is a schematic diagram showing the connection between the cap and the cover plate;

[0042] Figure 9 This is a cross-sectional view of a battery according to an embodiment of this application;

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

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

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

[0046] Figure 13 This is a three-dimensional schematic diagram of the electrode core and electrode tabs;

[0047] Figure 14 This is a front view of the electrode core and electrode tabs;

[0048] Figure 15 This is a front view of a battery according to yet another embodiment of this application;

[0049] Figure 16 This is a schematic diagram of one arrangement of poles and caps;

[0050] Figure 17 This is another schematic diagram of the arrangement of the pole and the cap;

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

[0052] Figure 19 This is a schematic diagram of an electrical device according to an embodiment of this application.

[0053] Figure label:

[0054] Electrical equipment 10000, battery 1000, cover plate assembly 100, positive electrode cover plate assembly 100a, negative electrode cover plate assembly 100b, electrode tab lead-out piece 10, electrode post connection part 1, electrode post connection hole 11, electrode tab connection part 2, first side surface 21, second side surface 22, top surface of connection part 23, lead-out cavity 3, cover plate 20, cap hole 201, small diameter part 2011, large diameter part 201 2. Step surface 2013, pole hole 202, liquid 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 Implementation

[0055] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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 application, and should not be construed as limiting this application.

[0056] In the description of this application, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] The following is combined Figures 1-19 This application describes in detail the tab lead-out piece 10, the cover plate assembly 100, the battery 1000, and the electrical device 10000 according to embodiments of the present application.

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

[0059] As shown in Figures 1-2 and Figure 9 , the tab connecting part 2 protrudes to the Y side of the pole connecting part 1 relative to the pole connecting part 1, and the pole core 300 is located on the opposite side of the Y side of the pole connecting part 1. For example, the tab connecting part 2 protrudes upward relative to the pole connecting part 1, and the pole core 300 is located on the lower side of the pole connecting part 1. In this way, the tab 400 does not excessively occupy the space where the pole core 300 is located, which is beneficial to improve the space ratio of the pole core 300 in the shell 200 of the battery 1000.

[0060] Optionally, the tab 400 and the tab connecting part 2 can be fixed by welding or adhesion, etc. The welding method can be any one of laser welding, ultrasonic welding, pulse welding, etc. The ultrasonic welding method is beneficial to reduce the damage of the tab 400.

[0061] In related technologies, a battery includes a shell, a pole core, a tab, and a cover plate, etc. The pole core and the tab are arranged inside the shell, the cover plate covers the open end of the shell, and the tab is connected with the pole core. Since the space below the cover plate is limited, the tab is often bent, and the bent tab is easy to cause the space below the cover plate to be wasted, reducing the space utilization. The too crowded tab bending also increases the risk of contact between the tab and the pole core, thereby causing short circuit. According to the tab lead-out piece 10 of the embodiments of the present application, by designing the tab connecting part 2 to protrude to one side of the pole connecting part 1, after the tab 400 is connected with the tab connecting part 2, the tab 400 also protrudes to one side of the pole connecting part 1, without excessively occupying the space on the other side of the pole connecting part 1, facilitating the installation of the pole core 300 in the space on the other side of the pole connecting part 1, and being beneficial to improve the space utilization. In addition, the tab 400 is not easy to bend in the space on the other side of the pole connecting part 1, reducing the risk of short circuit caused by the contact between the tab 400 and other pole cores 300.

[0062] In some embodiments of the present application, the tab connecting part 2 is multiple, or the pole connecting part 1 is multiple, and the tab connecting part 2 is connected with the pole connecting part 1 to form an integrated lead-out piece.

[0063] In some embodiments, as shown in Figures 1-2As shown, the lug connecting portions 2 and the pole connecting portions 1 are both multiple, for example, the lug connecting portions 2 and the pole connecting portions 1 are both three, the pole connecting portions 1 are used for fixing the poles 30, and the lug connecting portions 2 are used for connecting the lugs 400. The lug lead-out sheet 10 with multiple lug connecting portions 2 and multiple pole connecting portions 1 is suitable for the battery 1000 with multiple lugs 400 and multiple poles 30. The design of the integrated lug lead-out sheet 10 in the embodiment is suitable for the lead-out of multiple poles 30 and multiple lugs 400, doubles the connection area of the lugs 400 and the current-carrying area of the poles 30, improves the large-current load capacity of the pole core 300, and is beneficial to the use of the long battery 1000 with super high capacity.

[0064] In some embodiments not shown in the figure, the lug connecting portion 2 is one, and the pole connecting portion 1 is two, the lug connecting portion 2 is connected between the two pole connecting portions 1; or the lug connecting portion 2 is two, and the pole connecting portion 1 is one, the pole connecting portion 1 is connected between the two lug connecting portions 2.

[0065] Optionally, the lug connecting portion 2 and the pole connecting portion 1 are connected in the first direction (i.e. X direction).

[0066] Optionally, the lug connecting portion 2 and the pole connecting portion 1 can be alternately connected in the first direction. In specific embodiments, the number of the lug connecting portion 2 and the pole connecting portion 1 is equal or the difference between the two is 1, which ensures that the lug connecting portion 2 and the pole connecting portion 1 can be alternately connected.

[0067] Alternatively, the connection mode of the lug connecting portion 2 and the pole connecting portion 1 can be that the lug connecting portion 2 is in the middle region, and the pole connecting portion 1 is at both ends of the lug connecting portion 2 region.

[0068] Unlike the related art which improves the overcurrent capacity by improving the size of the lug 400, the present application starts from the number of the lug 400. The lug lead-out sheet 10 of the present application is an integrated lead-out sheet, which includes multiple lug connecting portions 2 and / or multiple pole connecting portions 1, is used to increase the number of the lug 400 and / or the pole 30, can increase the current-carrying capacity in proportion, improve the charging rate of the pole core 300 and the performance of the pole core 300, is beneficial to the realization of the capacity stacking of the super-long pole sheet of the pole core 300, and cooperatively improves the capacity of the battery 1000 monomer.

[0069] In some embodiments of the present application, referring to Figures 1-4 As shown, the lug connecting portion 2 has a first side 21 and a second side 22, the first side 21 and the second side 22 are oppositely arranged, the side of the first side 21 away from the second side 22 forms a lead-out cavity 3, the lead-out cavity 3 is used for the lug 400 to pass through, and the first side 21 is used for connecting the lug 400. The area of the first side 21 is relatively large, so that the connection between the lug 400 and the lug connecting portion 2 is relatively firm.

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

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

[0072] In some embodiments of the present application, referring to Figure 1 As shown, the tab connecting part 2 is configured as a sheet structure.

[0073] In some embodiments of the present application, referring to Figures 2-4 As shown, the tab connecting part 2 is configured as a boss, and the tab connecting part 2 further has a connecting part top surface 23 connecting the first side surface 21 and the second side surface 22, and the connecting part top surface 23 is used to connect the tab 400. That is, the tab 400 can be connected by being attached to the first side surface 21 and the connecting part top surface 23. The design of the boss can increase the strength of the tab lead-out sheet 10, and also increase the welding area and the current-carrying cross-sectional area of the tab 400, thereby significantly increasing the overcurrent capacity.

[0074] In some embodiments of the present application, referring to Figures 1-4 , Figure 6 As shown, the pole connecting part 1 is provided with a pole connecting hole 11, and the pole connecting hole 11 is used to connect the pole 30. Specifically, one end of the pole 30 is embedded in the pole connecting hole 11 to realize the positioning of the pole 30 by the pole connecting part 1, and the pole 30 is welded with the hole wall of the pole connecting hole 11 to realize the fixation of the pole 30 on the pole connecting part 1.

[0075] Referring to Figures 5-6 , Figures 9-12 , Figure 15As shown, the cover plate assembly 100 according to the second aspect of the present application comprises a cover plate 20, a pole 30, a cap 40 and the tab lead-out sheet 10 of the above embodiment, the cover plate 20 is located on one side of the tab lead-out sheet 10, the pole 30 is arranged on the cover plate 20, and the pole 30 is connected and fixed with the pole connecting portion 1, the cover plate 20 is provided with a cap hole 201, the cap 40 is arranged in the cap hole 201, and the cap 40 protrudes away from the side of the tab lead-out sheet 10, the cap 40 forms a cap cavity 401 which is in communication with the cap hole 201, and 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 with the tab connecting portion 2, the tab 400 also extends into the cap cavity 401, so that the tab 400 does not excessively occupy the space on the other side of the pole connecting portion 1. The cap 40 provides external space and protection for the tab 400, and also provides an airflow channel, so that the gas in the battery 1000 collects in the cap cavity 401, and the expansion of the gas is slowed down.

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

[0077] Referring to Figure 9 As shown, the tab connecting 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 connecting portion 2 is at least partially located in the cap cavity 401, and the part where the tab 400 is connected with the tab connecting portion 2 is also at least partially located in the cap cavity 401. The tab 400 enters the cap cavity 401 from the inside of the shell 200 through the gap (i.e. the lead-out cavity 3) on the side of the corresponding first side surface 21 in the Y direction, and the tab 400 is located in the cap cavity 401 on the side of the first side surface 21 of the tab connecting portion 2, and the tab 400 is welded or bonded to the first side surface 21 of the tab connecting portion 2, i.e. the first side surface 21 is the connecting surface, and the connection area of the tab 400 and the tab connecting portion 2 is less than or equal to the area of the first side surface 21. The connection part of the tab 400 and the tab connecting portion 2 is completely or partially located in the cap cavity 401 formed by the outer side surface of the cover plate 20 and the cap 40.

[0078] According to the cover plate assembly 100 provided by the embodiment of the present application, by designing the tab connecting portion 2 of the tab lead-out sheet 10 to protrude to one side of the pole connecting portion 1 and extend into the cap cavity 401, the tab 400 also protrudes to one side of the pole connecting portion 1 after the tab 400 is connected to the tab connecting portion 2, without occupying too much space on the other side of the pole connecting portion 1, facilitating the installation of the pole core 300 on the other side of the pole connecting portion 1, improving the space utilization, and reducing the risk of the tab 400 being bent on the other side of the pole connecting portion 1 and contacting other pole cores 300 to cause short circuit.

[0079] In some embodiments of the present application, as shown in Figures 3-6 , Figures 9-12 , Figure 15 , the cover plate 20 is provided with a pole hole 202, the pole hole 202 is a through hole, 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 the first direction, so that the pole 30 and the cap 40 are arranged at intervals in the first direction.

[0080] In some embodiments of the present application, as shown in Figures 6-8 , 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 is connected to the end of the small-diameter portion 2011 away from the tab lead-out sheet 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 in the cap body 402, the cap edge 403 protrudes outward from the outer periphery of the cap body 402, and the cap edge 403 is fixed to the stepped surface 2013. The stepped surface 2013 is recessed downward relative to the upper surface of the cover plate 20, and 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, so that the structure of the cover plate assembly 100 is more compact. The cap 40 presents a concave-convex cover structure, the cap 40 covers the stepped hollow structure (i.e., the cap hole 201) of the cover plate 20, and the cap cavity 401 provides space for the outer connection of the tab 400.

[0081] In the planar projection perpendicular to the cover plate 20, the projection of the small-diameter portion 2011 is located within the projection range of the large-diameter portion 2012, so that the stepped surface 2013 with a certain width is formed between the large-diameter portion 2012 and the small-diameter portion 2011, effectively stopping and limiting the cap edge 403.

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

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

[0084] In some embodiments of the present application, the cover plate 20 is provided with a positive pole column hole; and / or, the cover plate 20 is provided with a negative pole column hole. Specifically, when the cover plate assembly 100 is a positive cover plate assembly 100a, referring to Figures 10-11 As shown, the cover plate 20 is a positive cover plate 20a, the positive cover plate 20a is provided with a positive pole column hole, the positive cover plate 20a is further provided with a liquid injection hole 203, the positive tab 400a is connected to the tab connecting portion 2 of the positive cover plate assembly 100a, and the positive pole column 30a is connected to the pole column connecting portion 1 of the positive cover plate assembly 100a. When the cover plate assembly 100 is a negative cover plate assembly 100b, referring to Figure 10 、 Figure 12 As shown, the cover plate 20 is a negative cover plate 20b, the negative cover plate 20b is provided with a negative pole column hole, the negative cover plate 20b is further provided with an explosion-proof valve 204, the negative tab 400b is connected to the tab connecting portion 2 of the negative cover plate assembly 100b, and the negative pole column 30b is connected to the pole column connecting portion 1 of the negative cover plate assembly 100b. In some embodiments not shown in the figure, the cover plate 20 is provided with a positive pole column hole, a negative pole column hole, a liquid injection hole 203 and an explosion-proof valve 204, the positive tab 400a and the negative tab 400b are both connected to the corresponding tab connecting portion 2 of the cover plate assembly 100, the positive pole column 30a is installed in the positive pole column hole, the negative pole column 30b is installed in the negative pole column hole, and the positive pole column 30a and the negative pole column 30b are both connected to the corresponding pole column connecting portion 1 of the cover plate assembly 100.

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

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

[0087] Reference Figures 5-6 , Figures 9-15 As shown, the battery 1000 according to a third aspect embodiment of this application includes a housing 200, an electrode core 300, and a cover plate assembly 100 as described in the above embodiment. The housing 200 has an installation space, and at least one end of the housing 200 is an open end. The cover plate assembly 100 is disposed at the open end. The electrode core 300 is disposed in the installation space and is located on the side of the tab lead-out piece 10 facing away from the cover plate 20. The electrode core 300 has a tab 400, which extends at least partially into the cover cavity 401 through the cover hole 201, and is connected and fixed to the tab connecting portion 2. The electrode 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] Unlike related technologies that improve utilization by increasing the packing density within the housing 200, this application introduces a cap 40 structure from outside the housing 200. The cap 40 protrudes away from the side opposite to the tab lead-out piece 10, that is, it protrudes away from the electrode core 300. The cap 40 contains a cap cavity 401, which is used to house the tabs 400 that are led out into the cap cavity 401. This increases the space occupied by the electrode core 300 within the housing 200, making full use of the external space of the electrode post 30 height, and improving space utilization without affecting the volume of the battery 1000 individual cells.

[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 formed by stacking or rolling. The electrode core 300 includes a negative electrode sheet and a positive electrode sheet. The negative electrode tabs 400b of the negative electrode sheet are evenly distributed on one side of the electrode core 300, and the positive electrode tabs 400a of the positive electrode sheet are evenly distributed on the other side of the electrode core 300. There are multiple negative electrode tabs 400b and multiple positive electrode tabs 400a.

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

[0091] According to the battery 1000 of the embodiments of the present application, by designing the tab connecting part 2 of the tab lead-out part 10 to protrude to one side of the pole connecting part 1 and extend into the cap cavity 401, after the tab 400 is connected to the tab connecting part 2, the tab 400 also protrudes to one side of the pole connecting part 1 and extends into the cap cavity 401, without occupying too much installation space in the shell 200, facilitating the installation of the pole core 300 in the installation space on the other side of the pole connecting part 1, which is conducive to improving the space utilization rate, and the tab 400 is not easy to bend in the installation space, reducing the risk of short circuit caused by the contact between the tab 400 and other pole cores 300.

[0092] In some embodiments of the present application, referring to Figures 10-12 、 Figure 15 , the shell 200 has a first open end and a second open end, and the cover plate assembly 100 is two, 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, and the positive cover plate 20a of the positive cover plate assembly 100a is provided with a positive pole hole and a liquid injection hole 203, and the positive pole 30a is installed in the positive pole hole. The negative cover plate assembly 100b is arranged at the second open end, and the negative cover plate 20b of the negative cover plate assembly 100b is provided with a negative pole hole and an explosion-proof valve 204, and the negative pole 30b is installed in the negative pole hole. The tab 400 includes a positive tab 400a and a negative tab 400b, the positive tab 400a is connected and fixed with the tab connecting part 2 of the positive cover plate assembly 100a, and the negative tab 400b is connected and fixed with the tab connecting part 2 of the negative cover plate assembly 100b.

[0093] In some embodiments of the present application, the length of the shell 200 is greater than the width of the shell 200, and the thickness of the shell 200, and the shell 200 is a cuboid. In combination with 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, and 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, as shown in Figure 15 , in the X direction, the positive cover plate assembly 100a and the negative cover plate assembly 100b are arranged at both ends of the shell 200; or optionally, the positive cover plate assembly 100a and the negative cover plate assembly 100b are arranged at both ends of the width direction of the shell 200, as shown in Figure 10As shown, in the Y direction, the positive cover plate assembly 100a and the negative cover plate assembly 100b are arranged at both ends of the shell 200. In this way, the size of the battery 1000 in the thickness direction of the shell 200 is small. And the pole 30 is led out from the narrow surface (the surface parallel to the XZ plane or the YZ plane) of the shell 200, rather than the large surface (the surface parallel to the XY plane).

[0094] In some embodiments of the present application, the length Lk of the shell 200 ranges from 100 mm to 6000 mm, the length Lk and the width Wk of the shell 200 satisfy Lk / Wk = 3-100, and the thickness Hk of the shell 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] Figures 5-6 、 Figure 9 、 Figure 12 The cover plate assembly 100 shown is the negative cover plate assembly 100b, the cover plate 20 is provided with a plurality of pole holes 202, a plurality of cap holes 201, and an explosion-proof valve 204, the negative pole 30b is installed in the pole hole 202, the negative cap 40b is installed in the cap hole 201, the negative pole 30b and the negative cap 40b are arranged in order and alternately on the surface of the negative cover plate 20b, and the negative pole 30b and the explosion-proof valve 204 protrude from the outer side of the negative cover plate 20b. Similarly, Figure 11 The cover plate assembly 100 shown is the positive cover plate assembly 100a, the cover plate 20 of the positive cover plate assembly 100a is provided with a plurality of pole holes 202, a plurality of cap holes 201, and a liquid injection hole 203, the positive pole 30a is installed in the pole hole 202, the positive cap 40a is installed in the cap hole 201, and the positive pole 30a and the positive cap 40a are arranged in order and alternately on the surface of the positive cover plate 20a.

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

[0097] The excessively crowded space below the cover plate 20 can cause the gas generated by the pole core 300 in the circulation process to be difficult to flow, so that the explosion-proof valve 204 cannot be sensitive to explosion-proof, and the safety performance of the battery 1000 is reduced. By at least partially extending the tab 400 into the cap cavity 401 through the cap hole 201, the tab 400 does not excessively occupy the installation space in the shell 200, so that the airflow channel of the pole core 300 in the installation space is sufficient, and the gas generated by the pole core 300 in the circulation process can flow smoothly, thereby ensuring that the explosion-proof valve 204 can be sensitive to explosion-proof, and the safety performance of the battery 1000 is improved.

[0098] In some embodiments of the present application, after the tab 400 is connected and fixed with the tab connecting part 2, an insulating layer is wrapped outside the tab 400 and the tab connecting part 2. The insulating layer can realize the insulation between the tab 400, the tab connecting part 2, 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 silica gel, etc.

[0099] In some embodiments of the present application, the tab connecting part 2 and the pole connecting part 1 are alternately connected in the first direction, the length of the tab 400 is less than the length of the tab connecting part 2, and in the first direction, the length of the tab connecting part 2 and the length of the tab 400 satisfy the relationship: 0.5 < length of tab 400 / length of tab connecting part 2 < 0.95. Referring to Figures 1-2 , Figure 4 , it is shown that the length of the tab connecting part 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 of the tab 400 and the tab connecting part 2 is short, and the connection firmness is poor. When Lr / Lb ≥ 0.95, the tab 400 is prone to misalignment when it is attached to the tab connecting part 2, resulting in a portion of the tab 400 being unable to attach to the tab connecting part 2 in the length direction. Setting 0.5 < Lr / Lb < 0.95 enables the tab 400 to be better connected with the tab connecting part 2 in the first direction, and the connection firmness is higher.

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

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

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

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

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

[0105] Referring to Figure 19 As shown in the figure, the power consuming device 10000 according to the fourth aspect embodiment of the present application comprises the battery 1000 of the above-mentioned embodiments.

[0106] According to the power consuming device 10000 of the embodiments of the present application, by designing the tab connecting part 2 of the tab lead-out piece 10 to protrude to one side of the pole connecting part 1 and extend into the cap cavity 401, after the tab 400 is connected to the tab connecting part 2, the tab 400 also protrudes to one side of the pole connecting part 1 and extends into the cap cavity 401, without occupying too much installation space in the shell 200, facilitating the installation of the pole core 300 in the installation space on the other side of the pole connecting part 1, which is conducive to improving the space utilization rate, and the tab 400 is not easy to bend in the installation space, reducing the risk of short circuit caused by the contact between the tab 400 and other pole cores 300.

[0107] Optionally, the power consuming device 10000 can be a power consuming device 10000, a ship, an airplane, a machine tool, a household appliance, etc.

[0108] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0109] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0110] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does 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 integrate different embodiments or examples described in the present 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 limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A tabbing sheet characterized by, The application relates to a tab lead-out sheet. The tab lead-out sheet comprises: a pole post connecting part (1) for connecting a pole post (30); and a tab connecting part (2) for connecting a tab (400), wherein the tab connecting part (2) is connected with the pole post connecting part (1), and the tab connecting part (2) protrudes towards a side of the pole post connecting part (1) away from a direction of a core of the pole post connecting part (1); The tab connecting part (2) has a first side (21) and a second side (22) arranged oppositely, wherein a side of the first side (21) away from the second side (22) forms a lead-out cavity (3) for the tab (400) to pass through, and the first side (21) is used for connecting the tab (400); The tab connecting part (2) is connected with the pole post connecting part (1) in a first direction, the tab connecting part (2) protrudes towards a second direction relative to the pole post connecting part (1), and the tab connecting part (2) is recessed towards a third direction relative to the adjacent pole post connecting part (1) to form the lead-out cavity (3), wherein the first direction, the second direction and the third direction are perpendicular to each other. The tab connecting part (2) is multiple or the pole post connecting part (1) is multiple.

2. The tab lead-out sheet according to claim 1, characterized by The tab connecting part (2) is configured as a sheet structure.

3. The tab lead-out sheet according to claim 1, wherein The tab connecting part (2) is configured as a boss, and the tab connecting part (2) further has a connecting part top surface (23) connecting the first side (21) and the second side (22), wherein the connecting part top surface (23) is used for connecting the tab (400).

4. The tab lead-out sheet according to claim 1, wherein The pole post connecting part (1) is provided with a pole post connecting hole (11) for connecting the pole post (30).

5. The tab lead-out sheet according to claim 1, wherein The application further relates to a tab lead-out sheet.

6. A cover plate assembly characterized by, The tab lead-out sheet comprises: a cover plate (20), a pole post (30) and a cover cap (40), wherein the cover plate (20) is located on one side of the tab lead-out sheet, the pole post (30) is arranged on the cover plate (20) and is connected and fixed with the pole post connecting part (1), the cover plate (20) is provided with a cover cap hole (201), the cover cap (40) is arranged in the cover cap hole (201) and protrudes towards a side away from the tab lead-out sheet, a cover cap cavity (401) in communication with the cover cap hole (201) is formed in the cover cap (40), and the tab connecting part (2) at least partially extends into the cover cap cavity (401) through the cover cap hole (201). The cover plate (20) is provided with a pole post hole (202), the pole post (30) passes through the pole post hole (202) and is connected and fixed with the pole post connecting part (1), and the pole post hole (202) and the cover cap hole (201) are arranged in a first direction. ​ 7. The cover plate assembly of claim 6, wherein, ​ 8. The cover plate assembly of claim 6, wherein, The cap hole (201) comprises a small-diameter part (2011) and a large-diameter part (2012) connected to one end of the small-diameter part (2011) away from the tab lead-out piece, and a step surface (2013) is formed between the large-diameter part (2012) and the small-diameter part (2011), the cap (40) comprises 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 periphery of the cap body (402), and the cap edge (403) is fixed to the step surface (2013).

9. The cover plate assembly of claim 6, wherein, M of the pole posts (30) form a pole post group, and N of the caps (40) form a cap group, M and N are both positive integers, and the pole post group and the cap group are arranged alternately.

10. The cover plate assembly of claim 6, wherein, 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.

11. A battery, characterized by Comprise: A shell (200) having a mounting space inside, at least one end of the shell (200) being an open end; The cover plate assembly of any one of claims 6-9 is arranged at the open end; And A pole core (300) arranged in the mounting space, the pole core (300) being located on the side of the tab lead-out piece away from the cover plate (20), the pole core (300) having a tab (400), the tab (400) at least partially extending into the cap cavity (401) through the cap hole (201) and being connected and fixed with the tab connecting part (2).

12. The battery of claim 11, wherein, The shell (200) has a first open end and a second open end, and the cover plate assembly comprises a positive cover plate assembly (100a) and 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 post 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 post hole, the tab (400) comprises a positive tab (400a) and a negative tab (400b), the positive tab (400a) is connected and fixed with the tab connecting part (2) of the positive cover plate assembly (100a), and the negative tab (400b) is connected and fixed with the tab connecting part (2) of the negative cover plate assembly (100b).

13. The battery of claim 12, wherein, The length of the shell (200) > the width of the shell (200) > the thickness of the shell (200); The positive cover plate assembly (100a) and the negative cover plate assembly (100b) are arranged at both ends in the length direction of the shell (200), or the positive cover plate assembly (100a) and the negative cover plate assembly (100b) are arranged at both ends in the width direction of the shell (200).

14. The battery of claim 11, wherein, The shell (200) has an open end, the cover plate (20) is provided with a positive electrode post hole and a negative electrode post hole, the tab (400) includes a positive electrode tab (400a) and a negative electrode tab (400b), the tab connecting part (2) is multiple, and the positive electrode tab (400a) and the negative electrode tab (400b) are connected and fixed to different tab connecting parts (2).

15. The battery of any one of claims 11-14, wherein, After the tab (400) is connected and fixed with the tab connecting part (2), an insulating layer is wrapped outside the tab (400) and the tab connecting part (2).

16. The battery of any one of claims 11-14, wherein, The tab connecting part (2) and the electrode post connecting part (1) are alternately connected in a first direction, in the first direction, the length of the tab connecting part (2) and the length of the tab (400) satisfy the relationship: 0.5 < the length of the tab (400) / the length of the tab connecting part (2) < 0.

95.

17. The battery of any one of claims 11-14, wherein, The length of the pole core (300) is L, the length of the tab (400) is Lr, the number of the tab (400) is n, L, Lr and n satisfy the relationship: 0 < n * Lr / L < 1.

18. The battery of any one of claims 11-14, wherein, The height of the tab (400) protruding from the pole core (300) to the cover plate assembly is h, the thickness of the pole core (300) is H, h and H satisfy the relationship: 0 < h / H < 0.

5.

19. An electrical device, comprising: The battery comprising any one of claims 11-18. The battery comprising any one of claims 11-18.

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