CN113644356B - Lug connection structure of battery top cover and battery - Google Patents
Lug connection structure of battery top cover and battery Download PDFInfo
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- CN113644356B CN113644356B CN202110854091.5A CN202110854091A CN113644356B CN 113644356 B CN113644356 B CN 113644356B CN 202110854091 A CN202110854091 A CN 202110854091A CN 113644356 B CN113644356 B CN 113644356B
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- 238000003466 welding Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
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- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 210000003850 cellular structure Anatomy 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of batteries, and particularly relates to a tab connection structure of a battery top cover, which comprises a first connecting piece (1) and a second connecting piece, wherein the first connecting piece is used for being fixedly connected with a top cover sheet (8) or a pole of a battery; a second connector (2) connected to the first connector (1); the first connecting piece (1) and the second connecting piece (2) are of an integrated structure, the second connecting piece (2) is bent relative to the first connecting piece (1), and a connecting part (5) formed by bending or folding at least once is arranged between the first connecting piece (1) and the second connecting piece (2). The invention adopts a structure without rim charge, can reduce the production cost and can improve the production efficiency. In addition, the invention also discloses a battery.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a tab connection structure of a battery top cover and a battery.
Background
With the development of modern society and the enhancement of environmental awareness of people, more and more devices select lithium batteries as power sources, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, which provides a wide space for the application and development of the lithium batteries. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called batteries. The battery cell tab is welded in the structure of the pole through the switching piece, is widely used in the setting of battery top cap all the time, and under the general condition, the battery cell tab is first super welded together with the switching piece, then places top cap pole bottom laser welding in and realizes the battery cell function.
But to the wide electric core that energy density is high, structural design also has derived the both sides and has gone out utmost point ear structural style, and this design not only can improve electric core energy density, can also improve manufacturing process, but the utmost point ear welding portion needs the structure of design bending simultaneously, because the kink needs to be connected to utmost point ear welding portion, leads to the structure shape various, and the mould design can't avoid the surplus material that exists when arranging the mould, leads to manufacturing process defects such as rim charge many, with high costs.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the lug connection structure of the battery top cover is provided, and the structure without rim charge is adopted, so that the production cost can be reduced, and the production efficiency can be improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the tab connection structure of the battery top cover comprises a first connecting piece, a second connecting piece and a third connecting piece, wherein the first connecting piece is used for being fixedly connected with a top cover sheet or a pole of a battery; the second connecting piece is connected with the first connecting piece; the first connecting piece and the second connecting piece are of an integrated structure, the second connecting piece is bent relative to the first connecting piece, and a connecting part formed by at least one bending or folding is arranged between the first connecting piece and the second connecting piece.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both bars or plates.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are bar materials, and the first connecting piece and/or the second connecting piece are/is provided with a flattening part.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are bent to form a columnar connecting part.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece and the second connecting piece are both plates, one end of the first connecting piece is folded at least once to form a connecting part, the connecting part is connected with the second connecting piece, and the connecting part is isosceles triangle.
As an improvement of the lug connection structure of the battery top cover, the folding process is as follows: the first connecting piece and the second connecting piece are folded in half for 180 degrees on the plane, and the second connecting piece is folded in a direction away from the first connecting piece to form an isosceles triangle connecting part.
As an improvement of the tab connection structure of the battery top cover, the isosceles triangle is provided with two 45-degree angles, one waist edge of the isosceles triangle is provided with an extension part, and the extension part is bent for 90 degrees perpendicular to the plane of the first connecting piece.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece is provided with a through hole for passing a rivet.
As an improvement of the tab connection structure of the battery top cover, one end of the first connecting piece is folded at least once to form the second connecting piece.
As an improvement of the tab connection structure of the battery top cover, a connection part formed by at least one bending is arranged between the first connection piece and the second connection piece.
As an improvement of the tab connection structure of the battery top cover of the present invention, the thickness direction of the first connection member is the same as the thickness direction of the connection portion; the thickness direction of the first connecting piece is perpendicular to the thickness direction of the second connecting piece.
As an improvement of the tab connection structure of the battery top cover, the first connecting piece is provided with a concave part, and the through hole is arranged at the bottom of the concave part;
as an improvement of the tab connection structure of the battery top cover, at least one end of the concave part is provided with a welding hole for penetration welding or ultrasonic welding.
As an improvement of the tab connection structure of the battery top cover, the second connecting member is provided with a step portion.
As an improvement of the lug connection structure of the battery top cover, the first connecting piece and the second connecting piece are both bars or plates, and are made of copper or aluminum.
The second object of the present invention is to provide a battery including a top cover sheet provided with a first pole and a second pole; the first pole and the top cover sheet are integrally formed into a structure, and the second pole is mounted on the top cover sheet through a plastic part; and the two lug connection structures of the battery top cover are welded on the top cover plate, and the other lug connection structure is fixedly connected with the bottom of the second pole.
The invention has the beneficial effects that the invention comprises a first connecting piece which is used for being fixedly connected with the top cover piece or the pole of the battery; the second connecting piece is connected with the first connecting piece; the first connecting piece and the second connecting piece are of an integrated structure, the second connecting piece is bent relative to the first connecting piece, and a connecting part formed by at least one bending or folding is arranged between the first connecting piece and the second connecting piece. Because the mold design can not avoid the surplus material existing during the mould arrangement, the manufacturing procedure defects of more rim charge, high cost and the like are caused, therefore, the plate is bent for a preset angle to form a first connecting piece and a second connecting piece, the first connecting piece is connected with a top cover plate or a pole post of a battery, the second connecting piece is fixedly connected with a pole lug on the side wall of a battery cell, and electric connection between the pole post and a battery cell component is realized, wherein the plate is formed through a straight stamping forming process, a structure without protruding or recessed is not formed, the cost of a stamping die corresponding to the plate is reduced, the extra dimension is not caused after the plate is arranged, namely, the extra rim charge is not generated, then a pole lug connecting structure can be formed through bending and/or folding, the production process of the pole lug connecting structure is simplified, the production efficiency of the pole lug connecting structure is improved, the extra rim charge is not generated in the bending process, the effect of environmental protection is realized, and the connecting part and the first connecting piece and the second connecting piece are of an integral structure, and the integral strength of the pole lug connecting structure is improved. The invention adopts a structure without rim charge, can reduce the production cost and can improve the production efficiency.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural view of the first embodiment of the present invention after being mounted on the top cover sheet.
Fig. 3 is a schematic manufacturing view of a first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a third embodiment of the present invention.
Fig. 5 is a schematic view showing the structure of the third embodiment of the present invention after being attached to the top sheet.
Fig. 6 is a schematic diagram of a third embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a fourth embodiment of the present invention.
Fig. 8 is a schematic view of the structure of the fourth embodiment of the present invention after being attached to the top sheet.
Fig. 9 is a schematic diagram of the manufacturing of the fourth embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a fifth embodiment of the present invention.
Fig. 11 is a schematic structural view of the fifth embodiment of the present invention after the fifth embodiment is mounted on the top cover sheet.
Fig. 12 is a schematic view of the fifth embodiment of the present invention.
Fig. 13 is a schematic view of a battery according to the present invention.
Fig. 14 is a schematic view of another battery according to the present invention.
Wherein reference numerals are as follows:
1-a first connector;
2-a second connector;
3-flattening part;
4-through holes;
a 5-connection; 51-extension;
6-a recess; 61-welding holes;
7-a step;
8-a top cover sheet; 81-a first pole; 82-second pole;
9-plastic parts;
x-length direction.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The present invention will be described in further detail with reference to fig. 1 to 14, but the present invention is not limited thereto.
Embodiment one
The embodiment provides a battery, including electric core subassembly, top cap subassembly and casing, wherein, the casing can be hexahedron shape, also can be other shapes, and the inside formation of this casing holds the chamber for hold electric core subassembly and electrolyte, the one end of casing is equipped with the opening for electric core subassembly accessible this opening is placed in the chamber that holds of casing, and holds the intracavity and can be provided with a plurality of electric core subassemblies, and a plurality of electric core subassemblies pile up each other. The housing may comprise a metallic material, such as aluminum or an aluminum alloy, and may also comprise an insulating material, such as plastic.
The battery cell assembly comprises a battery cell and a tab, wherein the battery cell is provided with two opposite side walls along the length direction X, and the tab extends out of the two side walls of the battery cell respectively.
Wherein, top cap subassembly includes top cap piece 8 and two utmost point posts, and top cap piece 8 is fixed in the opening of casing to be provided with the explosion vent, and explosion vent department is provided with the explosion-proof valve, seals electric core subassembly and electrolyte in the holding chamber of casing, and the utmost point post sets up in top cap piece 8. The two poles are respectively a positive pole used for being electrically connected with the positive pole of the battery cell assembly and a negative pole used for being electrically connected with the negative pole of the battery cell assembly. Along length direction X, the both sides of electric core subassembly are provided with utmost point ear connection structure respectively, and an utmost point ear connection structure and the anodal utmost point post fixed connection on the top cap subassembly, then be connected with electric core subassembly again, another utmost point ear connection structure and the negative pole utmost point post fixed connection on the top cap subassembly, then be connected with electric core subassembly again. In this embodiment, the positive electrode post and the top cover sheet 8 may also adopt an integral structure, and the tab connection structure and the top cover sheet 8 may be fixedly connected, so that the electrical connection between the positive electrode post and the battery cell assembly may be realized.
In addition, the tab connection structure is used for electrically connecting the cell assembly of the battery with the outside of the battery. Because the electric core of electric core subassembly has the both sides wall that sets up relatively, and the tab extends from the lateral wall of electric core, and tab connection structure is used for being connected with the tab, in order to reduce the size of battery, generally need buckle the tab, and tab connection structure's setting is favorable to tab buckling and welding.
Specifically, the top cover sheet 8 is provided with a first pole 81 and a second pole 82; the first pole 81 and the top cover 8 are integrally formed, and the second pole 82 is mounted on the top cover 8 by a plastic member 9.
The lug connection structure of the battery top cover comprises a first connecting piece 1 which is used for being fixedly connected with a top cover sheet 8 or a pole of the battery; a second connector 2 connected to the first connector 1; the first connecting piece 1 and the second connecting piece 2 are of an integral structure, and the second connecting piece 2 is bent relative to the first connecting piece 1.
Because the mold design can not avoid the surplus material existing during the mold arrangement, the manufacturing procedure defects of more rim materials, high cost and the like are caused, therefore, the plate is bent for a preset angle to form the first connecting piece 1 and the second connecting piece 2, the first connecting piece 1 is connected with the top cover piece 8 or the pole post of the battery, the second connecting piece 2 is fixedly connected with the pole lug on the side wall of the battery cell, and electric connection between the pole post and the battery cell component is realized, wherein the plate is formed through a straight stamping forming process, has no convex or concave structure, contributes to reducing the cost of a stamping mold corresponding to the plate, has no extra dimension after being subjected to mold arrangement, namely, does not generate extra rim materials, can then form a pole lug connecting structure through bending, contributes to simplifying the production process of the pole lug connecting structure, improves the production efficiency of the pole lug connecting structure, and the bending process also does not generate extra rim materials to play a role in environmental protection.
In this embodiment, the panel is the linear type structure before bending, and the thickness of first connecting piece 1 and the thickness of second connecting piece 2 are equal for the panel just coincides with the five metals stamping die before the punching press and carries out the punching press, can not form the unnecessary size after arranging the mould, can not produce unnecessary rim charge promptly, helps reducing tab connection structure's manufacturing cost. Wherein the plate is made of single metal or alloy, such as copper or aluminum.
In the tab connection structure of the battery top cap according to the present invention, the second connection member 2 is provided with the stepped portion 7. Specifically, the step portion 7 is disposed at a position of the second connecting piece 2 corresponding to the tab, or may be formed by stamping, so as to match the shape of the tab, and in some embodiments, the tab has an R angle, and the step portion 7 may buffer the thickness of the R angle of the tab, so as to prevent lithium precipitation of the battery cell.
In addition, the tab connection structure of this embodiment can be used to connect the tab of positive pole post and electric core, because positive pole post and top cap piece 8 also adopt integral type structure, positive pole post is upwards protruding the formation by top cap piece 8, tab connection structure can adopt direct and top cap piece 8 fixed connection, top cap piece 8 is provided with the recess with first connecting piece 1 complex for first connecting piece 1 can imbed the bottom of top cap piece 8, help reducing the holistic height of top cap subassembly, improve the space utilization in the battery, thereby improve the quality of battery, also can not have the recess, directly weld in the top cap piece through the mode of penetrating welding, simplify the structure, reduce manufacturing cost.
Second embodiment
Unlike the first embodiment, the following is: the first connector 1 and the second connector 2 of this embodiment are both plates, the plates are L-shaped structures, and the first connector 1 is provided with a through hole 4 for a rivet to pass through. Specifically, the first connecting piece 1 and the second connecting piece 2 are L-shaped plates before bending, namely before bending, the first connecting piece 1 and the second connecting piece 2 are in the same plane and are mutually perpendicular, after bending, the plane where the first connecting piece 1 is perpendicular to the plane where the second connecting piece 2 is located, so that the first connecting piece 1 is parallel to the top cover sheet 8 and is convenient to be welded with the second pole 82 of the top cover sheet 8, the second connecting piece 2 extends towards the direction of the battery cell to play a role of connecting the pole lug and the second pole 82, wherein the first connecting piece 1 is provided with a through hole 4 for a rivet on the second pole 82 to pass through to play a role of fixing the second pole 82 and the first connecting piece 1, and the second connecting piece 2 can also form a step part 7 in a stamping mode to match the shape of the pole lug to prevent lithium precipitation of the battery cell.
In addition, the tab connection structure of the present embodiment may be used to connect the negative electrode post and the tab of the battery cell, that is, the second electrode post 82 is sleeved with at least one plastic part 9, which plays a role in insulating the second electrode post 82 and the top cover sheet 8, and the plastic part 9 includes, but is not limited to, an upper plastic part, a sealing ring and a lower plastic part, so that the requirement for fixing the second electrode post 82 is satisfied. The bottom of lower plastic part is provided with the recess that supplies first connecting piece 1 embedding, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.
Other structures are the same as those of the first embodiment, and will not be described here again.
Embodiment III
Unlike the first embodiment, the following is: the first connector 1 and the second connector 2 of the present embodiment are both bar materials, the first connector 1 and/or the second connector 2 are provided with a flattened portion 3, and the first connector 1 is provided with a through hole 4 for passing a rivet. Specifically, before bending, the rod is of a linear structure, the rod can also be of a strip-shaped columnar structure, the outer diameters of the rod are equal, after bending, the two ends of the rod are mutually perpendicular, the contact area of the rod and other parts is small, and the rod is inconvenient to connect with the pole lug or the pole post, so that the contact area of the first connecting piece 1 and the second connecting piece 2 with larger contact areas is increased by flattening the two ends of the rod to form the first connecting piece 1 and the second connecting piece 2 respectively, the overcurrent capacity of the pole lug connecting structure is improved, the performance of a battery is improved, the plane of the first connecting piece 1 is perpendicular to the plane of the second connecting piece 2, and the first connecting piece 1 and the second connecting piece 2 are connected through a columnar-like connecting part 5. The first connecting piece 1 is also provided with a through hole 4 for a rivet on the second pole 82 to pass through, so that the function of fixing the second pole 82 and the first connecting piece 1 is achieved, the second connecting piece 2 can form a step part 7 in a stamping mode, the shape of the electrode lug is matched, and lithium precipitation of the battery cell is prevented. The bar is made of single metal or alloy, such as copper or aluminum.
In addition, the tab connection structure of the present embodiment may be used to connect the negative electrode post and the tab of the battery cell, that is, the second electrode post 82 is sleeved with at least one plastic part 9, which plays a role in insulating the second electrode post 82 and the top cover sheet 8, and the plastic part 9 includes, but is not limited to, an upper plastic part, a sealing ring and a lower plastic part, so that the requirement for fixing the second electrode post 82 is satisfied. The bottom of lower plastic part is provided with the recess that supplies first connecting piece 1 and bar-shaped structure to imbed, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.
Other structures are the same as those of the first embodiment, and will not be described here again.
Fourth embodiment
Unlike the first embodiment, the following is: the first connecting piece 1 and the second connecting piece 2 of the embodiment are both plates, one end of the first connecting piece is folded at least once to form the second connecting piece 2, a connecting part 5 formed by at least one bending is arranged between the first connecting piece 1 and the second connecting piece 2, and the thickness direction of the first connecting piece 1 is the same as the thickness direction of the connecting part 5; the thickness direction of the first connector 1 is perpendicular to the thickness direction of the second connector 2, and the first connector 1 is provided with a through hole 4 for passing a rivet. Specifically, before turning over, the panel is linear type platelike structure, turns over the process and does: the first connecting piece 1 and the second connecting piece 2 are folded 180 degrees on a plane first, the second connecting piece 2 is folded in a direction away from the first connecting piece 1 to form a connecting part 5 of an isosceles triangle, wherein the connecting part 5 forms a layered structure similar to a triangle, such as an isosceles triangle, one waist edge of the isosceles triangle is provided with an extending part 51, the extending part 51 is bent 90 degrees perpendicular to the plane of the first connecting piece 1, the plane of the first connecting piece 1 is perpendicular to the plane of the second connecting piece 2, the connecting part 5 and the first connecting piece 1 are in the same plane, the extending part 51 extends from the plane to the direction of a battery core, but the invention is not limited by this, the plate can be folded for a plurality of times according to actual production requirements to improve the integral strength of the lug connecting structure, and in addition, after the lug connecting structure is manufactured, the thickness direction of the first connecting piece 1 is the same with the thickness direction of the connecting part 5, and the thickness direction of the first connecting piece 1 is perpendicular to the thickness direction of the second connecting piece 2.
In this embodiment, the first connector 1 is also provided with a through hole 4 through which the rivet on the second post 82 passes, so as to fix the second post 82 and the first connector 1, and the second connector 2 can also form the step 7 by punching, and the shape of the tab is matched, so that lithium precipitation of the battery cell is prevented. The plate material is made of single metal or alloy, such as copper or aluminum.
In addition, the tab connection structure of the present embodiment may be used to connect the negative electrode post and the tab of the battery cell, that is, the second electrode post 82 is sleeved with at least one plastic part 9, which plays a role in insulating the second electrode post 82 and the top cover sheet 8, and the plastic part 9 includes, but is not limited to, an upper plastic part, a sealing ring and a lower plastic part, so that the requirement for fixing the second electrode post 82 is satisfied. The bottom of lower plastic part is provided with the recess that supplies first connecting piece 1 and connecting portion 5 embedding, helps reducing the holistic height of top cap subassembly, improves the inside space utilization of battery to improve the quality of battery.
Other structures are the same as those of the first embodiment, and will not be described here again.
Fifth embodiment
The fourth difference from the embodiment is that: the first connector 1 of the present embodiment is provided with a recess 6, and the through hole 4 is provided at the bottom of the recess 6; at least one end of the recess 6 is provided with a welding hole 61 for penetration welding or ultrasonic welding. The structure of turning over earlier and then buckling of embodiment four can also be adopted to panel of this embodiment, increases depressed part 6, can form the difference in height with top cap piece 8, plays the effect that equipment was prevented slow-witted, and the bottom of depressed part 6 also can set up through-hole 4, be convenient for with rivet cooperation, supply the rivet to pass, helps improving tab connection structure's steadiness, increases and welds hole 61 and be convenient for with tab connection structure and top cap piece 8's lower surface welding together, preferably through penetration welding or super welding fixed connection. The second connecting piece 2 can also form a step part 7 in a stamping mode, and the shape of the electrode lug is matched, so that lithium precipitation of the battery cell is prevented.
The folding process is as follows: the first connecting piece 1 and the second connecting piece 2 are folded to form a connecting part 5 of an isosceles triangle, the isosceles triangle is provided with two 45-degree angles, one waist edge of the isosceles triangle is provided with an extending part 51, and the extending part 51 is bent by 90 degrees perpendicular to the plane of the first connecting piece 1.
In addition, the tab connection structure of this embodiment can be used to connect the tab of positive pole post and electric core, because positive pole post and top cap piece 8 adopt integral type structure, positive pole post is upwards protruding the formation by top cap piece 8, tab connection structure can adopt direct and top cap piece 8 fixed connection, helps reducing the holistic height of top cap subassembly, improves the space utilization in the battery to improve the quality of battery.
Other structures are the same as those of the fourth embodiment, and will not be described here again.
Battery cell
The battery of the invention comprises the lug connection structure of the battery top cover of the first to fifth embodiments.
Specifically, the method comprises the following steps: a top cover sheet 8 provided with a first pole 81 and a second pole 82; the first pole 81 and the top cover plate 8 are integrally formed, and the second pole 82 is mounted on the top cover plate 8 through a plastic part 9; two lug connection structures of the battery top cover are welded on the top cover sheet 8, and the other lug connection structure is fixedly connected with the bottom of the second pole 82.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. A tab connection structure of a battery top cover is characterized by comprising:
the first connecting piece (1) is used for being fixedly connected with a top cover piece (8) or a pole of the battery;
the second connecting piece (2) is connected to the first connecting piece (1), and the second connecting piece (2) is used for being fixedly connected with the electrode lug of the side wall of the battery cell;
the first connecting piece (1) and the second connecting piece (2) are of an integrated structure, the second connecting piece (2) is bent relative to the first connecting piece (1),
the first connecting piece (1) and the second connecting piece (2) are both plates, the plates are formed through a direct stamping forming process, the plates are of a linear plate-shaped structure before being folded, one end of the first connecting piece (1) is folded at least once to form an isosceles triangle connecting part (5), and the connecting part (5) is connected with the second connecting piece (2);
the isosceles triangle is provided with two 45-degree angles, one waist edge of the isosceles triangle is provided with an extension part (51), and the extension part (51) is bent by 90 degrees perpendicular to the plane of the first connecting piece (1).
2. The tab connection structure of a battery top cover as set forth in claim 1, wherein: the first connecting piece (1) and the second connecting piece (2) are bars, and the first connecting piece (1) and/or the second connecting piece (2) are/is provided with a flattening part (3).
3. The tab connection structure of a battery top cover as set forth in claim 2, wherein: the first connecting piece (1) and the second connecting piece (2) are bent to form a columnar connecting part (5).
4. The tab connection structure of a battery top cover as claimed in claim 1, wherein the folding process is as follows: the first connecting piece (1) and the second connecting piece (2) are folded in half for 180 degrees on a plane, and the second connecting piece (2) is folded in a direction away from the first connecting piece (1) to form a connecting part (5) of an isosceles triangle.
5. The tab connection structure of a battery top cover according to any one of claims 1 to 4, wherein: the first connecting piece (1) is provided with a through hole (4) for passing a rivet.
6. The tab connection structure of a battery top cover according to claim 1 or 4, wherein: the thickness direction of the first connecting piece (1) is the same as the thickness direction of the connecting part (5);
the thickness direction of the first connecting piece (1) is perpendicular to the thickness direction of the second connecting piece (2).
7. The tab connection structure of a battery top cover as set forth in claim 5, wherein: the first connecting piece (1) is provided with a concave part (6), and the through hole (4) is arranged at the bottom of the concave part (6);
at least one end of the concave part (6) is provided with a welding hole (61) for penetration welding or ultrasonic welding.
8. The tab connection structure of a battery top cover according to any one of claims 1 to 4, wherein: the second connecting piece (2) is provided with a step part (7).
9. The tab connection structure of a battery top cover according to any one of claims 1 to 4, wherein: the first connecting piece (1) and the second connecting piece (2) are made of copper or aluminum.
10. A battery, comprising:
a top cover sheet (8) provided with a first pole (81) and a second pole (82);
the first pole (81) and the top cover sheet (8) are integrally formed into a structure, and the second pole (82) is mounted on the top cover sheet (8) through a plastic part (9);
the tab connection structure of two battery top covers according to any one of claims 1 to 9, wherein one tab connection structure is welded on the top cover sheet (8), and the other tab connection structure is fixedly connected with the bottom of the second pole (82).
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| CN202110854091.5A CN113644356B (en) | 2021-07-28 | 2021-07-28 | Lug connection structure of battery top cover and battery |
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| CN113644356B true CN113644356B (en) | 2023-05-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN215834606U (en) * | 2021-07-15 | 2022-02-15 | 江苏正力新能电池技术有限公司 | Power battery top cap, battery and power consumption device |
| CN114122631B (en) * | 2021-11-27 | 2024-01-26 | 东莞市万连实业有限公司 | Preparation method of cell electrode switching sheet |
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Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Country or region after: China Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Patentee before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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