Lead-out member, cover plate assembly, battery and electric device

Abstract

Disclosed in the present disclosure are a lead-out member, a cover plate assembly, a battery and an electric device. The lead-out member comprises a positioning portion, which is adapted to be connected to a tab and is adapted to limit the tab. By means of providing the positioning portion that is adapted to connect to the tab and is adapted to limit the tab, the tab does not fold and insert into a core under the limiting effect of the positioning portion, so as to increase the accommodating space in a housing for accommodating the core.

Description

Lead-out piece, cover plate assembly, battery and electric device

[0001] The present disclosure claims priority to the Chinese patent application No. 202421785008.9, filed on July 26, 2024, and entitled "Lead-out piece, cover plate assembly, battery and electric device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of batteries, and more particularly, to a lead-out piece, a cover plate assembly, a battery and an electric device. BACKGROUND

[0003] The battery connects the pole core and the lead-out piece through the pole lug, and the lead-out piece charges and discharges through the pole column. The pole lug in the prior art has the problem of being easily inserted into the pole core in reverse.

[0004] UTILITARIAN CONTENT

[0005] The purpose of the present disclosure is to provide a lead-out piece, a cover plate assembly, a battery and an electric device to solve the problem of the pole lug being easily inserted into the pole core in reverse in the related art.

[0006] In a first aspect, the present disclosure provides a lead-out piece, comprising a positioning portion adapted to be connected with a pole lug and adapted to limit the pole lug.

[0007] In some embodiments, the positioning portion comprises a first face and a second face opposite to each other in a first direction, and the positioning portion is provided with a through hole penetrating through the first face and the second face, and the through hole is adapted to be provided with the pole lug.

[0008] In some embodiments, the through hole has four circumferential side walls connected head to tail.

[0009] In some embodiments, the positioning portion further comprises a third face connecting the first face and the second face, and the through hole further penetrates through the third face.

[0010] In some embodiments, the lead-out piece further comprises: a main body portion having a first surface in the first direction; and a protruding portion connected to one end of the main body portion and protruding from the first surface in the first direction, at least part of the protruding portion being the positioning portion.

[0011] In some embodiments, the protruding part comprises a first plate, a second plate and a third plate, the first plate and the second plate are connected to two ends of the third plate respectively, and the first plate and the second plate are oppositely arranged, the main part is connected to one end of the first plate and / or the second plate away from the third plate; wherein any one of the first plate, the second plate and the third plate is the positioning part, or any two of the first plate, the second plate and the third plate are the positioning part, or all of the first plate, the second plate and the third plate are the positioning part.

[0012] In some embodiments, the main part further comprises a second surface opposite to the first surface, the main part is provided with a first pole column hole penetrating through the first surface and the second surface.

[0013] In some embodiments, the main part is at least one, the protruding part is at least two, and the main part and the protruding part are alternately arranged; or the main part is at least two, the protruding part is at least one, and the main part and the protruding part are alternately arranged.

[0014] In some embodiments, the lead-out part further comprises a limiting part connected to one end of the protruding part away from the main part.

[0015] In the second aspect, the disclosure also provides a cover plate assembly comprising a cover plate and the lead-out part in the embodiments of the first aspect.

[0016] In some embodiments, the cover plate is provided with a first through hole, and at least part of the positioning part is accommodated in the first through hole.

[0017] In some embodiments, the cover plate assembly further comprises an insulating part provided with a second through hole, the insulating part is connected to one side surface of the cover plate, the first through hole and the second through hole are communicated, and at least part of the positioning part penetrates the second through hole.

[0018] In some embodiments, the lead-out part is provided with a first pole column hole, the cover plate assembly further comprises a pole column, the cover plate is further provided with a second pole column hole, the insulating part is further provided with a third pole column hole, and the pole column penetrates the second pole column hole, the third pole column hole and the first pole column hole in sequence.

[0019] In some embodiments, at least part of the positioning part penetrates the first through hole.

[0020] In some embodiments, the cover plate assembly further comprises a cap having an accommodation space with one end open, the cap is connected to the cover plate, and at least part of the positioning part is accommodated in the accommodation space.

[0021] In some embodiments, the battery further comprises a pole core, the tab comprises an extension part and a bent part, the pole core is accommodated in the shell, the bent part is connected with the extension part, one end of the extension part away from the bent part is connected with the pole core, and one end of the bent part away from the extension part extends out of the shell and is connected with the positioning part.

[0022] In some embodiments, the battery further comprises a pole core, the tab comprises an extension part and a bent part, the pole core is accommodated in the shell, the bent part is connected with the extension part, one end of the extension part away from the bent part is connected with the pole core, and one end of the bent part away from the extension part extends out of the shell and is connected with the positioning part.

[0023] In some embodiments, the bent part is a plurality of bent parts, and each of the plurality of bent parts is connected with the positioning part.

[0024] In some embodiments, the battery further comprises a pole core, the tab comprises an extension part and a bent part, the pole core is accommodated in the shell, the bent part is connected with the extension part, one end of the extension part away from the bent part is connected with the pole core, and one end of the bent part away from the extension part extends out of the shell and is connected with the positioning part.

[0025] By providing the positioning part, the positioning part is adapted to be connected with the tab, so that the tab extends out of the shell of the battery, and the tab will not be folded and inserted into the pole core under the limiting action of the positioning part, thereby increasing the accommodation space in the shell for accommodating the pole core. BRIEF DESCRIPTION OF DRAWINGS

[0026] FIG. 1 is a structural diagram of a lead-out piece according to an embodiment;

[0027] FIG. 2 is a structural diagram of a lead-out piece according to another embodiment;

[0028] FIG. 3 is a structural diagram of a lead-out piece according to another embodiment;

[0029] FIG. 4 is a structural diagram of a lead-out piece according to another embodiment;

[0030] FIG. 5 is an exploded view of a cover plate assembly according to an embodiment;

[0031] FIG. 6 is a structural diagram of a cover plate assembly according to an embodiment;

[0032] FIG. 7 is a structural diagram of a positive electrode of a battery according to an embodiment;

[0033] FIG. 8 is a structural diagram of a negative electrode of a battery according to an embodiment;

[0034] FIG. 9 is a structural diagram of a battery according to an embodiment.

[0035] Reference signs: 1000-battery; 100-cover plate assembly; 10-extraction piece, 11-main body part, 111-first surface, 112-second surface, 113-first pole column hole, 12-protruding part, 121-first plate, 122-second plate, 123-third plate, 13-limiting part, 131-third surface, 132-fourth surface, 14-positioning part, 141-first face, 142-second face, 143-through hole, 144-third face; 20-cover plate, 21-first through hole, 22-first liquid injection port, 23-second pole column hole; 30-insulating piece, 31-second through hole, 32-second liquid injection port, 33-third pole column hole; 40-explosion-proof valve; 50-pole column, 51-conductive body, 52-insulating spacer; 60-cap; 200-tab, 201-extension, 202-bent part; 300-housing, 301-receiving cavity; 400-pole core; Z-first direction. DETAILED DESCRIPTION

[0036] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent 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 are only used to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0037] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present disclosure and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0038] Some embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. The following embodiments and features in the embodiments can be combined with each other without conflict.

[0039] Please refer to FIG. 1 and FIG. 5, the present disclosure provides an extraction piece 10, which comprises a positioning part 14, the positioning part 14 is adapted to be connected with a tab 200 and adapted to limit the tab 200.

[0040] Optionally, the positioning portion 14 limits the tab 200 by stretching the tab 200. Optionally, the tab 200 can extend out of the shell 300 of the battery 1000 or can continue to be accommodated in the shell 300, without limitation. Optionally, the tab 200 can be straightened by the positioning portion 14, or the tab 200 can be bent and extended, without limitation.

[0041] Optionally, the lead-out piece 10 can be arranged at the positive electrode of the battery 1000 or at the negative electrode of the battery 1000, without limitation. Optionally, the lead-out piece 10 can be made of a material that satisfies structural strength, good electrical conductivity, and easy processing and molding, and can be stainless steel, nickel, aluminum-nickel alloy, iron-nickel alloy, or the like, without limitation.

[0042] Optionally, referring to FIG. 5, the lead-out piece 10 is used to connect with the tab 200 of the battery 1000 to electrically connect with the pole core 400 of the battery 1000. Optionally, the tab 200 and the positioning portion 14 can be connected and fixed by welding, bonding, screwing, clamping, or the like, without limitation.

[0043] By arranging the positioning portion 14, the positioning portion 14 is adapted to connect with the tab 200 and to limit the tab 200. Compared with the scheme in which the tab 200 is only connected with the lead-out piece 10 and is not stretched by the lead-out piece 10, in the present scheme, the tab 200 is limited because it is connected with the positioning portion 14, so that the tab 200 will not be folded and inserted into the pole core 400 under the limiting action of the positioning portion 14, thereby increasing the accommodation space in the shell 300 for accommodating the pole core 400.

[0044] Referring to FIGS. 1-4, the positioning portion 14 includes a first surface 141 and a second surface 142 opposite each other in a first direction Z, and the positioning portion 14 is provided with a through hole 143 penetrating the first surface 141 and the second surface 142, and the through hole 143 is adapted to pass through the tab 200. Optionally, the first direction Z corresponds to the thickness direction of the lead-out piece 10.

[0045] Optionally, the through hole 143 can be a plurality of through holes 143, and the plurality of through holes 143 are arranged at intervals on the third plate 123, without limitation. Optionally, the tab 200 is adapted to pass through the through hole 143 from the side of the lead-out piece 10 facing the pole core 400 and to be connected with the surface of the positioning portion 14 facing away from the pole core 400, so that the welding surface of the tab 200 and the lead-out piece 10 is located on the side of the lead-out piece 10 facing away from the pole core 400, and the metal particles generated by welding are not easy to fall into the inside of the battery 1000 to cause short circuit.

[0046] Exemplarily, the first surface 141 is a surface facing away from the pole core 400, and the second surface 142 is a surface facing toward the pole core 400, that is, the first surface 141 and the second surface 142 are sequentially arranged in the height direction of the battery 1000, and the tab 200 is connected to the first surface 141. Optionally, when the height direction of the battery 1000 is the vertical direction, the first surface 141 and the second surface 142 can be horizontally arranged or can be arranged to be inclined relative to the horizontal direction, without limitation. Optionally, when the first surface 141 and the second surface 142 are arranged to be inclined relative to the horizontal direction, the tab 200 can be connected to the first surface 141 or the second surface 142, without limitation.

[0047] By arranging the positioning portion 14 to include the first surface 141 and the second surface 142 facing away from each other in the first direction Z, the positioning portion 14 is provided with the through hole 143 penetrating the first surface 141 and the second surface 142, the through hole 143 is adapted to be provided with the tab 200, so that the tab 200 and the welding surface of the lead-out piece 10 are located on the side of the lead-out piece 10 facing away from the pole core 400, and the metal particles generated by welding are not easy to fall into the inside of the battery 1000 to cause short circuit.

[0048] In some embodiments, referring to FIGS. 1 and 2, the through hole 143 has four circumferential side walls connected end to end. Optionally, the through hole 143 can be arranged at the middle of the positioning portion 14 or can be arranged close to the edge of the positioning portion 14, without limitation. Optionally, the tab 200 can be connected to any position around the through hole 143 of the positioning portion 14 or can be connected to at least one side wall of the through hole 143, without limitation.

[0049] By arranging the through hole 143 to have four circumferential side walls connected end to end, the tab 200 is located in the through hole 143 and is not easy to contact the cover plate 20, so that the insulating ring of the cover plate assembly 100 can be cancelled, the space occupation of the cover plate assembly 100 is reduced, and the production cost is reduced.

[0050] In another some embodiments, referring to FIGS. 3 and 4, the positioning portion 14 further includes a third surface 144, the third surface 144 connects the first surface 141 and the second surface 142, and the through hole 143 further penetrates the third surface 144.

[0051] Optionally, in the orthographic projection in the thickness direction of the positioning portion 14, the contour shape of the positioning portion 14 can be rectangular, square, triangular, equilateral polygon, circular, elliptical, etc., without limitation, the first surface 141 and the second surface 142 are the two surfaces with the largest area of the positioning portion 14, and the third surface 144 is a surface with a smaller area of the positioning portion 14.

[0052] Optionally, when the profile shape of the positioning portion 14 in the orthographic projection in the thickness direction is a rectangle or an ellipse, the third surface 144 can be a surface of the positioning portion 14 in the width direction, or can be a surface of the positioning portion 14 in the length direction, without limitation. Optionally, when the profile shape of the positioning portion 14 in the orthographic projection in the thickness direction is a square, a triangle, an equilateral polygon, or a circle, the third surface 144 is at least part of the outer circumferential surface of the positioning portion 14.

[0053] By providing that the positioning portion 14 further includes the third surface 144, which connects the first surface 141 and the second surface 142, and the through hole 143 further penetrates the third surface 144, the tab 200 is more easily threaded through the through hole 143, and the contact area between the tab 200 and the lead-out piece 10 is larger, increasing the overcurrent capacity of the tab 200.

[0054] Please refer to FIG. 1 and FIG. 5, the lead-out piece 10 further includes a main body portion 11 and a protruding portion 12, the main body portion 11 has a first surface 111 in the first direction Z, and the protruding portion 12 is connected to one end of the main body portion 11 and protrudes beyond the first surface 111 in the first direction Z, at least part of the protruding portion 12 being the positioning portion 14.

[0055] Optionally, the main body portion 11 and the protruding portion 12 can be an integral structure, or can be connected and fixed by clamping, welding, screwing, riveting, etc., without limitation. Optionally, the positioning portion 14 can be part of the protruding portion 12 away from the main body portion 11, or can be part of the protruding portion 12 close to the main body portion 11, without limitation.

[0056] By providing that the lead-out piece 10 further includes the main body portion 11 and the protruding portion 12, the main body portion 11 has the first surface 111 in the first direction Z, and the protruding portion 12 is connected to one end of the main body portion 11 and protrudes beyond the first surface 111 in the first direction Z, at least part of the protruding portion 12 being the positioning portion 14, so that the positioning portion 14 is located on the protruding portion 12, increasing the distance that the tab 200 can extend out of the shell 300 of the battery 1000, further reducing the folding of the tab 200, preventing the tab 200 from being inserted into the pole core 400 upside down, and further increasing the accommodation space in the shell 300 for accommodating the pole core 400.

[0057] At the same time, the tab 200 is welded to the protruding portion 12, increasing the distance between the connection between the tab 200 and the lead-out piece 10 and the pole core 400, reducing the conduction of heat generated by the lead-out piece 10 during electrochemical cycling to the pole core 400, and because the folding of the tab 200 inside the shell 300 is reduced, the space utilization of the battery 1000 is improved.

[0058] Please refer to Figure 1, the protruding part 12 includes a first plate 121, a second plate 122 and a third plate 123, the first plate 121 and the second plate 122 are connected to the two ends of the third plate 123 respectively, and the first plate 121 and the second plate 122 are oppositely arranged, the main body part 11 is connected to the end of the first plate 121 and / or the second plate 122 away from the third plate 123, wherein any one of the first plate 121, the second plate 122 and the third plate 123 is the positioning part 14, or any two of the first plate 121, the second plate 122 and the third plate 123 are the positioning part 14, or the first plate 121, the second plate 122 and the third plate 123 are all the positioning part 14.

[0059] Optionally, the first plate 121 and the third plate 123 are arranged perpendicular to each other, or can have an acute angle or an obtuse angle, which is not limited. Optionally, the second plate 122 and the third plate 123 are arranged perpendicular to each other, or can have an acute angle or an obtuse angle, which is not limited. Optionally, the third plate 123 and the main body part 11 are arranged parallel to each other, or can be arranged obliquely, which is not limited.

[0060] Optionally, the first plate 121, the second plate 122 and the third plate 123 can be an integral structure, or can be detachably connected through clamping, screwing and riveting, which is not limited.

[0061] By arranging that the protruding part 12 includes the first plate 121, the second plate 122 and the third plate 123, the first plate 121 and the second plate 122 are connected to the two ends of the third plate 123 respectively, and the first plate 121 and the second plate 122 are oppositely arranged, the main body part 11 is connected to the end of the first plate 121 and / or the second plate 122 away from the third plate 123, wherein any one of the first plate 121, the second plate 122 and the third plate 123 is the positioning part 14, or any two of the first plate 121, the second plate 122 and the third plate 123 are the positioning part 14, or the first plate 121, the second plate 122 and the third plate 123 are all the positioning part 14, the positioning part 14 can protrude from the first surface 111, so that the connection between the tab 200 and the lead-out piece 10 is located on the side of the lead-out piece 10 away from the core 400, and the structural strength and heat dissipation performance of the lead-out piece 10 are improved.

[0062] Please refer to Figure 1 and Figure 5, the main body part 11 further includes a second surface 112 opposite to the first surface 111, and the main body part 11 is provided with a first pole hole 113 penetrating through the first surface 111 and the second surface 112.

[0063] Optionally, the first pole column hole 113 is adapted to be connected with the pole column 50. Optionally, referring to FIG. 1, the first pole column hole 113 can be a circular hole, a rectangular hole, an oval hole, and other non-circular holes, etc., to adapt to the shape of the pole column 50, without limitation. Optionally, the pole column 50 and the main body part 11 can be connected and fixed at the first pole column hole 113 by welding, clamping, bonding, magnetic attraction, etc., without limitation.

[0064] By setting the main body part 11 further comprising a second surface 112 opposite to the first surface 111, the main body part 11 is provided with the first pole column hole 113, the first pole column hole 113 penetrates the first surface 111 and the second surface 112, so that the pole core 400 of the battery 1000 can be connected with the pole column 50 through the tab 200 and the lead-out piece 10 in sequence, and the charging and discharging operation is performed through the pole column 50.

[0065] Referring to FIGS. 2 and 4, the main body part 11 is at least one, and the protruding part 12 is at least two, the main body part 11 and the protruding part 12 are alternately arranged, or the main body part 11 is at least two, and the protruding part 12 is at least one, the main body part 11 and the protruding part 12 are alternately arranged.

[0066] For example, the main body part 11 is one, and the protruding part 12 is two, the two protruding parts 12 are respectively connected to the two ends of the main body part 11 in the length direction of the lead-out piece 10. Optionally, the surfaces of the third plates 123 of the plurality of protruding parts 12 away from the main body part 11 are flush.

[0067] By setting the main body part 11 to be at least one, and the protruding part 12 to be at least two, the main body part 11 and the protruding part 12 are alternately arranged, or the main body part 11 is at least two, and the protruding part 12 is at least one, the main body part 11 and the protruding part 12 are alternately arranged, so that the current flows to the tab 200 through the plurality of tabs 200, thereby improving the current carrying capacity of the lead-out piece 10, and improving the reliability and safety of the connection between the tab 200 and the lead-out piece 10.

[0068] Referring to FIGS. 1 and 2, the lead-out piece 10 further comprises a limiting part 13, the limiting part 13 is connected to one end of the protruding part 12 away from the main body part 11.

[0069] For example, referring to FIG. 1, the main body part 11 is connected with the first plate 121, and the limiting part 13 is connected with the second plate 122. Optionally, the limiting part 13 and the protruding part 12 can be an integral structure, or can be connected and fixed by welding, clamping, bonding, magnetic attraction, etc., without limitation.

[0070] Optionally, the limiting portion 13 and the main body portion 11 are used to abut against the insulating piece 30 of the cover plate assembly 100 to limit the lead-out piece 10 in the thickness direction of the main body portion 11. Optionally, the limiting portion 13 comprises a third surface 131 opposite to a fourth surface 132, the third surface 131 is flush with the first surface 111, and the fourth surface 132 is flush with the second surface 112 of the main body portion 11.

[0071] For example, referring to FIG. 2, the limiting portion 13 is two, and the two limiting portions 13 are arranged at the two ends of the lead-out piece 10 in the length direction.

[0072] By arranging the limiting portion 13, the limiting portion 13 is connected to the end of the protruding portion 12 away from the main body portion 11, so that the connection between the lead-out piece 10 and the insulating piece 30 of the cover plate assembly 100 is more stable, and the overcurrent capacity and heat dissipation capacity of the lead-out piece 10 are improved.

[0073] Referring to FIGS. 5-8, the disclosure also provides a cover plate assembly 100 comprising a cover plate 20 and the lead-out piece 10 in the embodiment of the disclosure.

[0074] Optionally, the lead-out piece 10 can be connected with the cover plate 20, and the lead-out piece 10 can also be connected with other structures of the cover plate assembly, such as the insulating piece 30 and the pole 50, without limitation. Optionally, referring to FIGS. 5-7, the cover plate 20 located at the positive electrode of the battery 1000 is provided with a first liquid injection port 22, and the first liquid injection port 22 is used to inject electrolyte (not shown) into the shell 300. Optionally, referring to FIG. 8, the cover plate assembly 100 located at the negative electrode of the battery 1000 is also provided with a pressure relief valve 40, which is used to exhaust and discharge electrolyte when the pressure in the battery 1000 is too high. Optionally, the cover plate 20 can be made of a material that meets the structural strength and is easy to process and form, and the specific material can be aluminum alloy, carbon fiber, copper alloy, etc., without limitation.

[0075] The cover plate assembly 100 provided by the disclosure realizes the sealing of the shell 300 of the battery 1000 by adopting the cover plate 20 and the lead-out piece 10 in the embodiment of the disclosure, and the pole core 400 of the battery 1000 can be charged and discharged through the lead-out piece 10, while preventing the tab 200 from being folded and inserted into the pole core 400, increasing the accommodation space for accommodating the pole core 400 in the shell 300, and improving the safety of the battery 1000.

[0076] Referring to FIGS. 5-8, the cover plate 20 is provided with a first through hole 21, and the positioning portion 14 is accommodated in at least part of the first through hole 21.

[0077] Optionally, in the embodiment, the protruding portion 12 communicates with the outside through the first through hole 21. Optionally, the protruding portion 12 can protrude from the surface of the cover plate 20 away from the pole core 400, or can be recessed in the surface of the cover plate 20 away from the pole core 400, without limitation. Optionally, the protruding portion 12 can be in contact with the inner circumferential surface of the first through hole 21, or can be spaced apart, without limitation. By providing the cover plate 20 with the first through hole 21 and accommodating the positioning portion 14 in at least part of the first through hole 21, the battery 1000 can be welded between the tab 200 and the positioning portion 14 after the cover plate 20 is installed, reducing the damage of the battery 1000 caused by the dust generated during welding entering the inside of the shell 300.

[0078] Please refer to FIGS. 5-8, the cover plate assembly 100 further comprises an insulating piece 30, the insulating piece 30 is provided with a second through hole 31, the insulating piece 30 is connected to one side surface of the cover plate 20, the first through hole 21 and the second through hole 31 are communicated, and at least part of the positioning portion 14 is arranged in the second through hole 31.

[0079] Optionally, please refer to FIGS. 5 and 6, the equivalent diameter of the second through hole 31 is smaller than the equivalent diameter of the first through hole 21, and the outer circumferential surface of the protruding portion 12 is in contact with the inner circumferential wall surface of the second through hole 31, so that the protruding portion 12 and the inner circumferential surface of the first through hole 21 have a spacing distance, avoiding the short circuit between the lead-out piece 10 and the cover plate 20.

[0080] Optionally, the first through hole 21 and the second through hole 31 can be multiple, the multiple first through holes 21 and the multiple second through holes 31 are arranged one by one and correspond to the multiple protruding portions 12. Optionally, the tab 200 is connected to the surface of the protruding portion 12 away from the main body portion 11 through the second through hole 31, the first through hole 21 and the through hole 143 of the protruding portion 12 in turn.

[0081] Optionally, the insulating piece 30 is provided with a second liquid injection port 32, the first liquid injection port 22 and the second liquid injection port 32 are oppositely arranged, and the second liquid injection port 32 communicates the inside of the shell 300 of the battery 1000. Optionally, the insulating piece 30 can be made of a material that meets the structural strength, good insulation and stable chemical properties, which can be rubber, plastic, silicone and the like, without limitation.

[0082] By providing the insulating piece 30, the insulating piece 30 is provided with the second through hole 31, the insulating piece 30 is connected to one side surface of the cover plate 20, the first through hole 21 and the second through hole 31 are communicated, and at least part of the positioning portion 14 is arranged in the second through hole 31, so that the lead-out piece 10 and the cover plate 20 are insulated, avoiding the short circuit between the lead-out piece 10 and the cover plate 20.

[0083] Please refer to Figure 5, the lead-out piece 10 is provided with a first pole column hole 113, the cover plate assembly 100 further comprises a pole column 50, the cover plate 20 is further provided with a second pole column hole 23, the insulating piece 30 is further provided with a third pole column hole 33, and the pole column 50 is sequentially arranged in the second pole column hole 23, the third pole column hole 33 and the first pole column hole 113.

[0084] Optionally, the pole column 50 can be arranged at the middle of the cover plate 20, so as to reduce the current flowing path on the pole column 50, and reduce the internal resistance and heat generation of the lead-out piece 10. Optionally, the pole column 50 can also be arranged at one end of the cover plate 20 in the length direction of the cover plate 20, so as to simplify the installation process of the cover plate assembly 100, and provide a larger contact area for the tab 200 and the lead-out piece 10, thereby improving the current carrying capacity of the lead-out piece 10 and the tab 200.

[0085] Optionally, the pole column 50 comprises a conductive body 51 and an insulating spacer 52, the insulating spacer 52 is annularly arranged on the outer circumferential surface of the conductive body 51 and elastically abuts against the inner wall surface of the second pole column hole 23, so as to prevent the conductive body 51 and the cover plate 20 from being short-circuited, and fix the pole column 50 on the cover plate 20. Optionally, the conductive body 51 is in interference fit with the first pole column hole 113, so as to stabilize the electrical connection between the pole column 50 and the conductive body 51.

[0086] Optionally, the material of the conductive body 51 is similar to that of the lead-out piece 10, which will not be repeated here. Optionally, the material of the insulating spacer 52 is similar to that of the insulating piece 30, which will not be repeated here.

[0087] By arranging the pole column 50, the cover plate 20 is further provided with the second pole column hole 23, the insulating piece 30 is further provided with the third pole column hole 33, and the pole column 50 is sequentially arranged in the second pole column hole 23, the third pole column hole 33 and the first pole column hole 113, so that the pole core 400 of the battery 1000 can be charged and discharged through the pole column 50, and the external structure is convenient to connect, thereby improving the practicability of the battery 1000.

[0088] Please refer to Figure 6, at least part of the protruding part 12 is arranged in the first through hole 21. Optionally, the third plate 123 protrudes from the surface of the cover plate 20 away from the insulating piece 30, so that the through hole 143 is located on the side of the cover plate 20 away from the insulating piece 30.

[0089] By arranging at least part of the protruding part 12 in the first through hole 21, the through hole 143 is located on the side of the cover plate 20 away from the insulating piece 30, so as to facilitate the connection of the tab 200 and the protruding part 12.

[0090] Please refer to Figure 5, the cover plate assembly 100 further comprises a cover cap 60, the cover cap 60 has an open receiving space (not shown), the cover cap 60 is connected to the cover plate, and at least part of the positioning part 14 is received in the receiving space.

[0091] Optionally, the cap 60 is connected to the surface of the cover plate 20 away from the insulating member 30, and the protrusion 12 is partially accommodated in the accommodation space of the positioning portion 14. Optionally, the inner wall surface of the cap 60 has a spacing distance with the positioning portion 14. Optionally, the cap 60 can be multiple, and the multiple caps 60 and the multiple first through holes 21 are one-to-one correspondingly arranged. Optionally, the cap 60 and the cover plate 20 can be connected and fixed by welding, clamping, screwing, riveting, and bonding, without limitation.

[0092] By arranging the cap 60, the cap 60 has an open accommodation space (not shown) at one end, the cap 60 is connected to the cover plate, and at least part of the positioning portion 14 is accommodated in the accommodation space, so that the part of the tab 200 and the lead-out member 10 protruding from the cover plate 20 can be isolated from the outside environment and is not easily affected by the outside environment.

[0093] Please refer to FIGS. 7-9, the disclosure also provides a battery 1000, which comprises a shell 300, a tab 200, and a cover plate assembly 100 in the embodiment of the disclosure, the cover plate 20 is connected with the shell 300, part of the tab 200 is accommodated in the shell 300, and the other part of the tab 200 extends out of the shell 300 and is connected with the positioning portion 14.

[0094] Optionally, the battery 1000 can be a power battery, a household energy storage battery, a commercial energy storage battery, an industrial energy storage battery, etc., without limitation. Optionally, the tab 200 is connected with the surface of the positioning portion 14 away from the pole core 400. Optionally, the battery further comprises a pole core 400, the shell 300 has a containing cavity 301, the pole core 400 is accommodated in the containing cavity, the pole core 400 and the tab 200 are connected, and the cover plate 20 of the cover plate assembly 100 is connected with the shell 300 and closes the containing cavity 301. Optionally, the cover plate 20 and the shell 300 can be connected and fixed by welding, clamping, bonding, riveting, and screwing, without limitation. Optionally, the containing cavity 301 is filled with an electrolyte (not shown), and the pole core 400 is immersed in the electrolyte, so that the pole core 400 can be charged and discharged through the electrolyte.

[0095] Optionally, the pole core 400 can be multiple, and the multiple pole cores 400 are connected in series or in parallel, without limitation. Optionally, the tab 200 can be multiple, and the multiple tabs 200 are connected in series or in parallel, without limitation. Optionally, the shell 300 can be made of a material that meets the structural strength and is easy to process and form, and can be made of aluminum alloy, carbon fiber, copper alloy, etc., without limitation.

[0096] The battery 1000 provided by the present disclosure, by adopting the shell 300, the tab 200 and the cover plate assembly 100 in the embodiments of the present disclosure, the cover plate 20 is connected with the shell 300, part of the tab 200 is accommodated in the shell 300, the other part of the tab 200 extends out of the shell 300 and is connected with the positioning part 14, the tab 200 is prevented from being folded and inserted into the pole core 400, the accommodation space in the shell 300 for accommodating the pole core 400 is increased, and the safety of the battery 1000 is improved.

[0097] Please refer to FIG. 5, the battery 1000 further comprises the pole core 400, the tab 200 comprises the extension part 201 and the bending part 202, the pole core 400 is accommodated in the shell 300, the bending part 202 is connected with the extension part 201, one end of the extension part 201 away from the bending part 202 is connected with the pole core 400, and one end of the bending part 202 away from the extension part 201 extends out of the shell 300 and is connected with the positioning part 14.

[0098] By setting the tab 200 to comprise the extension part 201 and the bending part 202, the pole core 400 is accommodated in the shell 300, the bending part 202 is connected with the extension part 201, one end of the extension part 201 away from the bending part 202 is connected with the pole core 400, and one end of the bending part 202 away from the extension part 201 extends out of the shell 300 and is connected with the positioning part 14, so that the contact area between the tab 200 and the positioning part 14 is increased, and the overcurrent capacity and the connection strength of the tab 200 and the lead-out piece 10 are improved.

[0099] Please refer to FIG. 5, the bending part 202 is multiple, and the multiple bending parts 202 are all connected with the positioning part 14. For example, the bending part 202 is two, the two bending parts 202 are oppositely bent in the width direction of the cover plate 20 and are respectively connected with different positions of the positioning part 14.

[0100] By setting the bending part 202 to be multiple and the multiple bending parts 202 to be all connected with the positioning part 14, the overcurrent capacity and the connection strength of the tab 200 and the lead-out piece 10 are further improved.

[0101] The present disclosure further provides an assembling method of the cover plate assembly 100 of the battery 1000, which comprises:

[0102] The cover plate 20, the insulating piece 30 and the lead-out piece 10 are sequentially connected and fixed, and then the pole 50 is sequentially inserted into the second pole hole 23, the third pole hole 33 and the first pole hole 113.

[0103] The cover plate 20 connected with the insulating piece 30, the lead-out piece 10 and the pole 50 is connected with the shell 300 of the battery 1000.

[0104] The tab 200 in the shell 300 is pulled out to the outside of the battery 1000 through the through hole 143 of the lead-out piece 10, and the tab 200 is welded with the positioning part 14 of the lead-out piece 10, and finally the cover cap 60 is connected to the cover plate 20.

[0105] The present disclosure also provides a power consuming device (not shown), which comprises the power consuming apparatus (not shown) and the battery 1000 in the embodiments of the present disclosure, and the battery 1000 is adapted to supply power to the power consuming apparatus. Optionally, the power consuming device can be a vehicle, a household appliance, a commercial appliance, an industrial appliance, etc., without limitation. Optionally, the power consuming apparatus can be an electric motor, a controller, a sensor, etc., without limitation. The battery 1000 in the embodiments of the present disclosure realizes the storage and supply of electric energy through the conversion between chemical energy and electric energy.

[0106] The power consuming device provided by the present disclosure realizes the storage and output of electric energy by adopting the power consuming apparatus and the battery 1000 in the embodiments of the present disclosure, and the battery 1000 is adapted to supply power to the power consuming apparatus, which prevents the tab 200 from being folded and inserted into the pole core 400, increases the accommodation space for accommodating the pole core 400 in the shell 300, and improves the safety of the battery 1000.

[0107] In the description of the present disclosure, the description referring to the terms "embodiment", "example", etc. 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 disclosure. In the present disclosure, 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.

[0108] Although the embodiments of the present disclosure have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A tab comprising a positioning portion (14) adapted to connect with and limit a tab (200).

2. The tab according to claim 1, wherein the positioning portion (14) comprises a first face (141) and a second face (142) opposite in a first direction (Z), and the positioning portion (14) is provided with a through hole (143) passing through the first face (141) and the second face (142), and the through hole (143) is adapted to pass the tab (200) therethrough.

3. The tab according to claim 2, wherein the through hole (143) has four side walls connected head to tail.

4. The tab according to claim 2, wherein the positioning portion (14) further comprises a third face (144) connecting the first face (141) and the second face (142), and the through hole (143) further passes through the third face (144).

5. The tab according to any one of claims 2-4, wherein the tab (10) further comprises: a main body portion (11) having a first surface (111) in the first direction (Z); and a protruding portion (12) connected to one end of the main body portion (11) and protruding beyond the first surface (111) in the first direction (Z), and at least part of the protruding portion (12) is the positioning portion (14).

6. The tab according to claim 5, wherein the protruding portion (12) comprises a first plate (121), a second plate (122) and a third plate (123), the first plate (121) and the second plate (122) are respectively connected to two ends of the third plate (123), and the first plate (121) and the second plate (122) are oppositely arranged, and the main body portion (11) is connected to one end of the first plate (121) and / or the second plate (122) away from the third plate (123); any one of the first plate (121), the second plate (122) and the third plate (123) is the positioning portion (14), or any two of the first plate (121), the second plate (122) and the third plate (123) are the positioning portion (14), or all of the first plate (121), the second plate (122) and the third plate (123) are the positioning portion (14).

7. The tab according to claim 5, wherein the main body portion (11) further comprises a second surface (112) opposite to the first surface (111), and the main body portion (11) is provided with a first pole hole (113) passing through the first surface (111) and the second surface (112).

8. The tab according to claim 5, wherein the main body portion (11) is at least one, the protruding portion (12) is at least two, and the main body portion (11) and the protruding portion (12) are alternately arranged. wherein ​ ​ ​ Alternatively, the main body part (11) is at least two, the protruding part (12) is at least one, the main body part (11) and the protruding part (12) are arranged alternately.

9. The lead-out piece according to claim 5, further comprising a limiting part (13) connected to one end of the protruding part (12) away from the main body part (11).

10. A cover plate assembly comprising a cover plate (20) and the lead-out piece (10) according to any one of claims 1-9.

11. The cover plate assembly according to claim 10, wherein the cover plate (20) is provided with a first through hole (21), and the positioning part (14) is accommodated in at least part of the first through hole (21).

12. The cover plate assembly according to claim 11, further comprising an insulating piece (30) provided with a second through hole (31), the insulating piece (30) being connected to one side surface of the cover plate (20), the first through hole (21) and the second through hole (31) being communicated, and at least part of the positioning part (14) being arranged through the second through hole (31).

13. The cover plate assembly according to claim 12, wherein the lead-out piece (10) is provided with a first pole hole (113), the cover plate assembly (100) further comprises a pole (50), the cover plate (20) is further provided with a second pole hole (23), the insulating piece (30) is further provided with a third pole hole (33), and the pole (50) is arranged through the second pole hole (23), the third pole hole (33) and the first pole hole (113) in sequence.

14. The cover plate assembly according to claim 11, wherein at least part of the positioning part (14) is arranged through the first through hole (21).

15. The cover plate assembly according to claim 14, further comprising a cap (60) having an open receiving space at one end, the cap (60) being connected to the cover plate (20), and at least part of the positioning part (14) being accommodated in the receiving space.

16. A battery comprising a shell (300), a tab (200) and the cover plate assembly (100) according to any one of claims 10-15, the cover plate (20) being connected to the shell (300), a part of the tab (200) being accommodated in the shell (300), and another part of the tab (200) being arranged out of the shell (300) and connected to the positioning part (14).

17. The battery of claim 16, further comprising a pole core (400), the tab (200) comprising an extension (201) and a bent portion (202), the pole core (400) being received in the housing (300), the bent portion (202) being connected with the extension (201), the extension (201) being connected with the pole core (400) at an end away from the bent portion (202), the bent portion (202) being connected with the positioning portion (14) at an end away from the extension (201).

18. The battery of claim 17, the bent portion (202) being a plurality, each of the plurality of bent portions (202) being connected with the positioning portion (14).

19. An electric device comprising an electric device and the battery (1000) of any one of claims 16-18, the battery (1000) being adapted to power the electric device.

Images