CN115036652A - Pole riveting connection method, pole connection structure and battery top cover - Google Patents
Pole riveting connection method, pole connection structure and battery top cover Download PDFInfo
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- CN115036652A CN115036652A CN202210774483.5A CN202210774483A CN115036652A CN 115036652 A CN115036652 A CN 115036652A CN 202210774483 A CN202210774483 A CN 202210774483A CN 115036652 A CN115036652 A CN 115036652A
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- 239000004033 plastic Substances 0.000 claims description 49
- 229920003023 plastic Polymers 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 47
- 238000000465 moulding Methods 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 14
- 238000001746 injection moulding Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
-
- 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
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape 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
- H01M50/10—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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
- H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
-
- 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
- H01M50/543—Terminals
- H01M50/547—Terminals characterised by the disposition of the terminals on the cells
- H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
-
- 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
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a riveting connection method of a pole, a pole connection structure and a battery top cover. The pole connecting structure in riveting connection can improve the structural strength and the torsion strength of the pole.
Description
Technical Field
The invention belongs to the technical field of power battery matching of new energy automobiles, and particularly relates to a pole riveting connection method, a pole connection structure and a battery top cover.
Background
The power battery is an important component of the new energy vehicle, and the existing new energy battery mostly adopts a lithium ion battery as the power battery. For a power lithium battery, besides the key components such as the battery core and the BMS, the structure of the battery shell is also an important factor for the safety of the power lithium battery. The pole is a component of the battery module, and is used for connecting with the positive electrode and the negative electrode of the battery core in the module for conducting electricity, and also needs to have corresponding structural strength and sealing requirements so as to meet the application requirements of automobiles.
Disclosure of Invention
The invention aims to provide a riveting connection method of a pole with high pole strength and high torsion strength, a pole connection structure and a battery top cover.
As a first aspect of the present invention, there is provided a rivet connection method of a pole, including the steps of:
step S1: arranging a pole column hole and a first through part on the top cover sheet; a sealing member having a third through-hole and a rivet member having a second rivet portion are provided below the top cover plate.
Step S2: and after the first riveting piece sequentially passes through the first through part, the third through part and the riveting hole, the end part of the first riveting piece is used for punching and riveting.
Step S3: the end part of the first riveting piece is punched to form a riveting cap, the riveting cap is arranged at least to one side in a protruding mode to be matched with the riveting hole to form a riveting connection structure, and the pole, the top cover plate, the sealing piece and the riveting piece are riveted together.
According to the method for caulking and connecting the pole, in step S1, a bracket is further provided between the pole and the top lid piece, and the bracket is provided with a second through-hole. In step S2, the first rivet passes through the second through hole, the first through hole, the third through hole, and the rivet hole in this order.
According to the riveting connection method of the pole, the method further comprises the following steps: and step S4, after the riveting of the S3 is completed, an upper plastic part is further formed on the periphery of the pole in an injection molding mode, and the outer side or the support of the pole is wrapped by the upper plastic part.
According to the riveting connection method of the pole, the bracket and the sealing element are both made of insulating materials, so that the pole and the top cover plate are arranged in an insulating manner;
according to the riveting connection method of the pole, the pole comprises a pole part and a pole fixing part, and the first riveting piece is arranged on the lower surface of the pole fixing part;
according to the riveting connection method of the pole, the support comprises a support main body and a first through hole, a plurality of first insulating parts are further arranged on the outer side of the support main body, and a second through part is arranged on the first insulating parts;
according to the pole riveting connection method, the riveting piece comprises a riveting piece body and a fourth through hole, and the second riveting part is convexly formed on the upper surface of the riveting piece body.
According to the riveting connection method of the pole, the sealing element comprises a sealing element main body and a second through hole, a second insulating element is arranged on the upper surface of the sealing element main body in a protruding mode, and a third through part is arranged on the second insulating element in a penetrating mode;
according to the riveting connection method of the pole, the upper plastic part comprises an upper plastic part body and a third through hole, and the upper plastic part body is matched on the pole fixing part.
According to the method for riveting and connecting the pole, the first insulating part or the second insulating part is at least partially fitted in the first through part so that the first riveting piece and the first through part are in insulating fit.
As a second aspect of the present invention, a riveted terminal connecting structure is provided, which includes a top cover plate, the top cover plate is provided with at least one terminal hole, and a terminal is fixed to a terminal mounting position by a terminal fixing structure to form a positive terminal assembly or a negative terminal assembly.
The top cover sheet is further provided with at least one first through portion, and the pole comprises at least one first riveting piece. The pole fixing structure comprises a riveting piece, a sealing piece and an upper plastic piece, wherein the riveting piece is arranged below the top cover plate, and the sealing piece is arranged between the riveting piece and the top cover plate; and a third through part is arranged on the sealing element, a second riveting part is arranged on the riveting element, and a riveting hole is arranged on the second riveting part. The first riveting piece is formed by punching and riveting the end part of the first riveting piece after the first through part, the third through part and the riveting hole are sequentially arranged, the riveting cap acts on the riveting hole to form a riveting structure, the pole column and the top cover plate are insulated, and the upper plastic piece is formed on the periphery of the pole column in an injection molding mode.
According to the riveted pole connecting structure, the pole fixing structure comprises a bracket, and the bracket is arranged between the pole and the top cover plate; and a second through part is arranged on the bracket.
According to the riveted pole connecting structure, the first rivet member passes through the second through portion, the first through portion, the third through portion, and the riveting hole in this order, and then the end portion thereof is press-riveted to form the rivet cap.
According to the riveted pole connecting structure, the first through part, the second through part, the third through part or the riveting hole is a through hole or a notch which is arranged in a penetrating manner.
According to the riveted pole connecting structure, the first rivet, the first through portion, the second through portion, or the third through portion has an arc-shaped cross section.
According to foretell riveted utmost point post connection structure, support and sealing member all adopt insulating material to make and set up insulatingly between utmost point post and the top cap piece.
According to foretell riveted utmost point post connection structure, utmost point post includes utmost point post portion and utmost point post fixed part, and first riveting sets up on the lower surface of utmost point post fixed part.
According to foretell riveted utmost point post connection structure, the support includes support main part and first through-hole, the support main part outside still is equipped with a plurality of first insulating part, and the second is run through the portion and is set up on first insulating part.
According to the riveted pole connecting structure, the riveting piece comprises a riveting piece main body and a fourth through hole, and the second riveting part is convexly formed on the upper surface of the riveting piece main body.
According to the riveted pole connecting structure, the sealing element comprises a sealing element main body and a second through hole, a second insulating piece is convexly arranged on the upper surface of the sealing element main body, and the third through part is penetratingly arranged on the second insulating piece.
According to the riveted pole connecting structure, the upper plastic part comprises an upper plastic part main body and a third through hole, and the upper plastic part main body is matched with the pole fixing part.
According to the riveted pole connecting structure, the first insulating part or the second insulating part is at least partially fitted in the first through part so that the first riveting piece and the first through part are in insulated fit.
According to the riveted pole connecting structure, a first insulating convex part is further formed on the lower surface of the first insulating part around the second through part, and the first insulating convex part is provided to protrude downward relative to the first insulating part; the outer diameter of the first insulating convex part is smaller than or equal to the inner diameter of the first through part, so that the first insulating part at least partially extends into the first through part.
According to the riveted pole connecting structure, a bracket convex part which is convexly arranged relative to the lower surface of the bracket main body is arranged around the first through hole; the lower surface of the support main body separation pole post fixing part and the upper surface of the concave ring part enable the lower surface and the upper surface to be insulated, and the support convex part separates the pole post from the first through hole to enable the lower surface and the upper surface to be insulated.
According to the riveted pole connecting structure, the second riveting part is provided with the riveting hole and the positioning part convexly arranged around the riveting hole, and the riveting cavity is concavely arranged below the second riveting part.
According to the riveted pole connecting structure, the upper plastic part main body comprises a cavity part formed by wrapping the pole fixing part during injection molding.
According to the riveted pole connecting structure, the first riveting piece and the first through part are separated by the first insulating convex part and the second insulating piece for insulation.
According to foretell riveted utmost point post connection structure, utmost point post fixed part includes first utmost point post convex part and second utmost point post convex part, and first utmost point post convex part sets up for second utmost point post convex part is protruding on the radial direction, still is formed with the second breach between first utmost point post convex part and the second utmost point post convex part, goes up to mould a packing second breach.
According to the riveted pole connecting structure, a first gap is formed between the adjacent first insulating parts, the second pole convex part corresponds to the first gap, and the first pole convex part corresponds to the first insulating part.
According to foretell riveted utmost point post connection structure, on mould a main part and mould the portion including first portion of moulding and second, first portion of moulding is corresponding with second utmost point post convex part, the second moulds the portion and is corresponding with first utmost point post convex part, first insulating part of moulding including filling first breach formation.
According to foretell riveted utmost point post connection structure, the piece of moulding under still being equipped with in top cap piece below, be equipped with the first connecting portion of a plurality of on moulding down the upper surface of piece, be equipped with the second connecting portion on the lower surface of top cap piece, mould piece and top cap piece under first connecting portion and the unsmooth cooperation of second connecting portion are in order to be connected.
According to foretell riveted utmost point post connection structure, still be equipped with the utmost point post cooperation portion that corresponds the setting with utmost point post installation position on moulding down, utmost point post cooperation portion includes fourth through-hole and the utmost point post convex part that sets up around fourth through-hole.
According to the riveted pole connecting structure, the sealing element is in a compressed state after being riveted.
According to the riveted pole connecting structure, at least two first riveting pieces are arranged at intervals along the circumferential direction to form an annular riveting structure.
Most preferably, the first rivets are three in number and are uniformly arranged in the circumferential direction.
According to foretell riveted utmost point post connection structure, utmost point post hole periphery still is equipped with the concave ring portion of locating on the upper surface of top cap piece concavely, and first logical portion sets up on the concave ring portion.
According to the riveted terminal connecting structure, the sealing member further includes a second concave-convex portion recessed in the second insulating member, and the second riveted portion is fitted in the second concave-convex portion to be positioned.
According to foretell riveted utmost point post connection structure, top cap piece formula top cap piece as an organic whole, utmost point post hole have two and set up respectively in the both ends department of top cap piece, are equipped with the explosion-proof valve port and the notes liquid mouth that are used for supplying explosion-proof valve to set up between the two poles of the earth post hole.
According to the riveted pole connecting structure, the explosion-proof valve comprises an explosion-proof valve plate and a protective film; the explosion-proof valve plate is matched with the explosion-proof valve port from the lower part, and the protective film is attached to the upper part of the explosion-proof valve port; or the explosion-proof valve plate is integrally arranged on the top cover plate, and the protective film is attached to the explosion-proof valve plate.
According to the riveted pole connecting structure, the bracket is made of PPS (polyphenylene sulfide) or other insulating engineering plastics with certain strength, and the sealing element is made of fluororubber or other similar soft insulating materials.
As a third aspect of the present invention, there is provided a battery top cover including the riveted terminal connection structure of any one of the above.
The riveting connection method of the pole, the pole connection structure and the battery top cover have the following beneficial effects:
1. the terminal post is riveted and connected in a stamping and riveting mode, so that the structural strength and the torsion resistance of the terminal post can be improved.
2. The first riveting piece of utmost point post passes the second through part ground setting of top cap piece, and is equipped with insulation system between the two.
3. The upper plastic part is formed in an injection molding mode, and the inner part of the upper plastic part is wrapped by the support and the pole fixing part, so that the structural strength of the upper plastic part is improved.
4. Locate utmost point post outlying second breach and eccentric settings's second utmost point post convex part, can increase and mould the structural strength and the resistance to torsion of piece after the rubber coating is moulded plastics.
5. The first riveting piece of the pole is arranged in the support and the sealing piece in a penetrating mode and riveted with the riveting piece, and is arranged in the first penetrating portion in a penetrating mode, and therefore rotation of all parts is locked.
6. The sealing element is in a compressed state after riveting, and the sealing performance of the pole hole meets the requirement.
7. The assembly is simple, and production efficiency is high.
Drawings
FIG. 1 is a schematic diagram of a battery top cover structure according to an embodiment of the invention;
FIG. 2 is an exploded view of the embodiment of FIG. 1;
FIG. 3 is a cross-sectional view of the embodiment of FIG. 1 taken along section AA;
FIG. 4 is an enlarged partial schematic view of FIG. 3;
FIG. 5 is a schematic structural diagram of the top cover in the embodiment of FIG. 1;
FIG. 6 is a schematic structural view of the bracket in the embodiment of FIG. 1;
FIG. 7 is a bottom view of the pole of the embodiment of FIG. 1;
fig. 8 is a schematic diagram of a top elevation view of the pole of fig. 7;
fig. 9 is a cross-sectional structural view of the pole of fig. 7;
FIG. 10 is a schematic structural view of the seal in the embodiment of FIG. 1;
FIG. 11 is a bottom view schematic diagram of the top molding of the embodiment of FIG. 1;
FIG. 12 is a schematic structural view of a rivet in the embodiment of FIG. 1;
FIG. 13 is a cross-sectional view of FIG. 12;
FIG. 14 is a cross-sectional view of FIG. 10;
fig. 15 is a schematic structural view of a lower plastic part in the embodiment of fig. 1.
Wherein, the top cover plate 2, the explosion-proof valve 3, the lower plastic piece 4, the positive pole post assembly 10a, the negative pole post assembly 10b, the pole post 10, the bracket 11, the riveting piece 12, the sealing piece 13, the upper plastic piece 14, the pole post mounting position 21, the liquid injection port 22, the explosion-proof valve port 23, the explosion-proof valve sheet 31, the protective film 32, the pole post 101, the pole post fixing portion 102, the first riveting piece 103, the first pole post convex portion 104, the second pole post convex portion 105, the second notch 106, the bracket main body 111, the first through hole 112, the bracket convex portion 113, the first insulating portion 114, the second through portion 115, the first insulating convex portion 116, the first notch 117, the riveting main body 121, the fourth through hole 122, the second riveting portion 123, the riveting hole 124, the riveting cavity 125, the positioning portion 126, the sealing piece main body 131, the second through hole 132, the second insulating piece 133, the third through portion 134, the second concavo-convex portion 135, the first convex portion 136, the second convex portion 137, the upper plastic part comprises an upper plastic part body 141, a third through hole 142, a first plastic part 143, a second plastic part 144, an insulating part 145, a cavity part 146, a pole hole 211, a first through part 212, a concave ring part 213, a pole matching part 41, a buffer cavity 42, a first connecting part 401, a fourth through hole 411, a pole convex part 412, a riveting part body 1031 and a riveting cap 1032.
Detailed Description
In order that those skilled in the art may better understand the invention and that the scope of the invention that is claimed may be more clearly defined, the invention is described in detail below with respect to certain specific embodiments of the invention. It should be noted that the following description is only a few embodiments of the present invention, and the specific direct description of the related structures is only for the convenience of understanding the present invention, and the specific features do not, of course, directly limit the implementation scope of the present invention. Such alterations and modifications as are made obvious by those skilled in the art and guided by the teachings herein are intended to be within the scope of the invention as claimed.
A top cap of a power battery is used for being matched to a battery shell to form a battery module so as to be matched with other components such as a BMS module to form the power battery.
As shown in fig. 1, the battery top cover integrated with the top cover is rectangular as a whole, a positive electrode pole assembly 10a and a negative electrode pole assembly 10b are respectively arranged at two ends of the battery top cover, and an explosion-proof valve 3 for performing an explosion-proof function and a liquid injection port 22 for injecting electrolyte are arranged between the two pole assemblies. After the battery core is rotated in a battery shell (not shown in the figure), the positive and negative pole column assemblies are respectively electrically connected with the positive and negative poles of the battery core, and the battery top cover is connected with the battery shell to form the battery module.
As shown in fig. 2, the positive electrode terminal assembly 10a and the negative electrode terminal assembly 10b of the battery top cap each include a terminal 10 and a terminal fixing structure for fixing the terminal 10 to the top cap sheet 2. Be equipped with utmost point post installation position 21 on the top cap piece 2, utmost point post 10 quilt utmost point post fixed knot constructs to utmost point post installation position 21 department in order to form positive utmost point post subassembly 10a or negative pole post subassembly 10 b.
Utmost point post fixed knot constructs including support 11, riveting 12, sealing member 13 and last piece 14 of moulding, utmost point post installation position 21 includes utmost point post hole 211, support 11 sets up between utmost point post 10 and top cap piece 2, utmost point post 10 at least partly passes top cap piece 2 in order to be used for cooperating to be connected rather than riveting on riveting 12, riveting 12 sets up in top cap piece 2 below, both form riveted structure through the punching press riveting, sealing member 13 sets up between riveting 12 and top cap piece 2, in order to play sealed and insulating effect.
In the present embodiment, the terminal post 10 and the top cover plate 2 are arranged in an insulating manner, so that the insulating property of the battery top cover meets the requirement.
In this embodiment, there are two pole holes 211, which are respectively disposed near two ends of the top cover plate 2, and +/-marks are correspondingly marked on the upper surface of the top cover plate 2 to mark the polarity of the pole.
As shown in fig. 5, two pole mounting positions 21 are arranged on the top cover plate 2, and a liquid injection port 22 and an explosion-proof valve port 23 are arranged between the two pole mounting positions 21. The liquid injection port 22 is penetratingly disposed on the top cover plate 2 for injecting electrolyte, and the explosion-proof valve port 23 is penetratingly disposed on the top cover plate 2 for matching with the explosion-proof valve.
In this embodiment, the pole mounting position 21 includes a pole hole 211 penetrating the top cover 2, so that at least a portion of the pole 10 penetrates and then is electrically connected to a connecting plate (not shown). The periphery of the pole column hole 211 is provided with a concave ring part 213 which is concavely arranged on the upper surface of the top cover plate 2 in a surrounding way, and the concave ring part 213 is provided with a plurality of first through parts 212 in a penetrating way.
In this embodiment, the first through hole 212 is an arc-shaped through hole. In other embodiments, the shape or number of the first through parts 212 may be set as required.
As shown in fig. 2, the explosion-proof valve 3 comprises an explosion-proof valve sheet 31 and a protective film 32, wherein the explosion-proof valve sheet 31 is matched with the explosion-proof valve port 23 from the lower part and welded to the explosion-proof valve port; the protection film 32 is attached to the upper side of the explosion-proof valve port 23 to cover the explosion-proof valve port 23. In other embodiments, the top cover plate 2 may not have the explosion-proof valve port 23, but the explosion-proof valve sheet 31 is integrally formed on the top cover plate 2, and the protective film 32 is attached to the explosion-proof valve sheet 31 to cover the explosion-proof valve sheet.
As shown in fig. 6, the overall shape of the holder 11 is similar to a circular ring shape, and includes a holder main body 111 and a first through hole 112 penetratingly provided at the center of the holder main body 111; a holder protrusion 113 protruding from the lower surface of the holder main body 111 is provided around the first through hole 112. The bracket 11 is disposed between the pole post 10 and the top cover plate 2, more specifically, between the lower surface of the pole post 10 and the concave ring portion 213. At this time, the holder main body 111 separates the lower surface of the pole fixing portion 102 of the pole 10 and the upper surface of the recessed ring portion 213 from each other, and the holder projection 113 is located between the pole 10 and the first through hole 112 so as not to contact each other.
In this embodiment, the bracket 11 is made of an insulating material, so that the pole 10 is primarily insulated from the top cover plate 2. For example, PPS or other insulating and strength engineering plastics may be used.
As shown in fig. 6, a plurality of first insulating portions 114 are further provided outside the holder main body 111, and second through portions 115 are provided on the first insulating portions 114 so as to pass therethrough. In this embodiment, the second through holes 115 are also arc-shaped, and the number of the second through holes is three and the second through holes are uniformly arranged. Of course, in other embodiments, the shape and number of the second through holes 115 may be additionally provided as needed, and are not limited.
As shown in fig. 6, a first insulating protrusion 116 is formed on the lower surface of the first insulating portion 114 around the second through hole 115, and is provided to protrude from the first insulating portion 114; the first insulating protrusion 116 is disposed to at least partially extend into the first through portion 212, so as to insulate the pole post 10 from the first through portion 212. A first gap 117 is formed between adjacent first insulating portions 114.
As shown in fig. 7 and 8, the pole 10 includes a pole part 101 and a pole fixing part 102 disposed on the periphery of the pole part, and the pole part 101 is protruded upward and downward to form an upper pole cylindrical surface and a lower pole cylindrical surface for conducting electricity. The post fixing portion 102 includes a first post projection 104 and a second post projection 105, which are circumferentially disposed, and a second notch 106 is formed between the first post projection 104 and the second post projection 105. The first pole projection 104 is provided to project in the radial direction from the second pole projection 105.
As shown in fig. 7, a first rivet 103 is protruded from the lower surface of the pole fixing portion 102, and the first rivet 103 is protruded from the lower surface of the first pole protrusion 104 to form a downward protruded shape. In the present embodiment, the first rivet 103 also has an arc shape so as to match the shapes of the first through hole 212 and the second through hole 115. The first rivet 103 includes a rivet body 1031 and a rivet cap 1032, and the rivet cap 1032 is formed by a press-riveting process, and is convexly provided in at least one side direction to perform a riveting function.
In this embodiment, the rivet cap 1032 is convex in each lateral direction to form a rivet structure that interacts with the rivet hole 124 to limit.
After the fitting, the first rivet 103 passes through the second through portion 115 and the first through portion 212 in sequence, extends to below the top lid sheet 2, and passes through the rivet hole 124 of the rivet 12. The lower end of the rivet body 1031 is press worked to form the rivet cap 1032 as described to fit in the rivet chamber 125 for rivet retention. The second through hole 115 is smaller in width than the first through hole 212, and the first insulating protrusion 116 can be provided so as to at least partially protrude into the first through hole 212, so that the first caulking member 103 and the first through hole 212 are insulated from conduction by the first insulating protrusion 116.
As shown in fig. 9, the sealing member 13 is annular in shape as a whole, and includes a sealing member main body 131 and a second through hole 132 penetrating the sealing member main body 131, a second insulating member 133 is protruded on the upper surface of the sealing member main body 131, and a third through portion 134 penetrating the second insulating member 133 is provided on the second insulating member 133; the third through part 134 is shaped and positioned to correspond to the first rivet 103 of the pole 10 to allow the first rivet to pass through, and the second insulator 133 is shaped and positioned to correspond to the first through part 212 of the top cover plate 2 to at least partially fit into the first through part 212, so that the first rivet 103 is insulated from the first through part 212.
As shown in fig. 4, in the present embodiment, the insulation between the first rivet 103 and the first through hole 212 is formed by the first insulating portion 114 and the second insulating member 133. In other embodiments, it may be formed of one of them.
As shown in fig. 13, the sealing member 13 further includes a second concave-convex portion 135 recessed in the second insulating member 133, a first convex portion 136 is provided in an outer direction of the second concave-convex portion 135, and a second convex portion 137 is provided around the second through hole 132 in an inner direction. Rivet 12 is positioned between first protrusion 136 and second protrusion 137.
In the present embodiment, the protruding second riveting portion 123 is engaged with the recessed second concave-convex portion 135, so as to realize the relative positioning between the two portions, reduce the engaging thickness, and simplify the structure of the pole assembly.
As shown in fig. 11, the rivet 12 has a circular ring shape as a whole, and includes a rivet body 121 and a fourth through hole 122 disposed through the rivet body 121; the upper surface of the rivet body 121 is further provided with a second rivet portion 123, the second rivet portion 123 is provided with a rivet hole 124 and a positioning portion 126 protruding around the rivet hole 124, and the positioning portion 126 is fitted into the second concave-convex portion 135 for positioning. A riveting cavity 125 is concavely arranged below the second riveting portion 123, so that a riveting cap 1032 formed by riveting after the first riveting member 103 passes through is fitted therein.
In this embodiment, the sealing member 13 is in a compressed state after riveting, which can be achieved by relatively compressing the pole 10 and the rivet 12 before riveting, so that the sealing at the pole hole 211 is tight. The sealing member 13 may be made of a material such as fluororubber.
As shown in fig. 1-3, the upper molding member 14 is formed on the periphery of the pole 10 by injection molding to wrap the pole 10 and the bracket 11, so that only the cylindrical surface of the pole 10 is exposed for conducting electricity.
As shown in fig. 10, the upper plastic part 14 is also annular, and includes an upper plastic part main body 141 and a third through hole 142 penetrating the upper plastic part main body 141, and the third through hole 142 is used for exposing the upper pole surface of the pole 10.
The upper plastic part body 141 comprises a first plastic part 143 and a second plastic part 144, the first plastic part 143 comprises an insulating part 145 and a cavity part 146 located on the inner side of the insulating part, and the second plastic part 144 is a notch communicated with the cavity part 146.
After the pole 10 is fitted to the bracket 11, the pole fixing portion 102 is attached to the bracket body 111, the first pole projection 104 overlaps the first insulating portion 114, and the second pole projection 105 overlaps the first notch 117. Therefore, during the injection molding process of the upper molding member 14, the first molding portion 143 and the second molding portion 144 are formed; the insulation portion 145 of the first plastic portion 143 is formed by filling the first notch 117 with a glue, and the cavity portion 146 is used for accommodating the post fixing portion 102, or is formed by surrounding the post fixing portion 102 during injection molding.
As shown in fig. 13, the battery top cover further includes a lower plastic part 4, wherein a plurality of first connecting parts 401, which are riveting protruding columns, are convexly arranged on the upper surface of the lower plastic part 4, and second connecting parts (not shown in the figure), which are riveting concave holes, are correspondingly arranged on the lower surface of the top cover plate 2. After heating the first connecting part 401 for hot melting, the first connecting part is matched with the second connecting part to form hot melting riveting connection between the first connecting part and the second connecting part, so that the lower plastic part 4 and the top cover plate 2 are connected with each other.
In this embodiment, the lower plastic part 4 is further provided with a pole fitting portion 41 corresponding to the pole mounting position 21, and the pole fitting portion 41 includes a fourth through hole 411 and a pole projection 412 surrounding the fourth through hole 411
In this embodiment, the lower plastic part 4 is further provided with a buffer cavity 42, which is disposed below the explosion-proof valve 3 and has a plurality of buffer through holes penetrating therethrough to play a role of buffering.
The riveting method of the pole comprises the following steps:
first, the first rivet 103 of the post 10 is inserted through the second through hole 115 formed in the bracket 11, the first through hole 212 formed in the top cover plate 2, the third through hole 134 formed in the sealing member 13, and the rivet hole 124 formed in the rivet 12 in this order to complete the initial assembly positioning of the components.
Next, a certain pressure is applied to the pole 10 and/or rivet 12, so that the first rivet 103 fits into the rivet cavity 125, while the seal 13 is in a compressed state.
Then, while the above pressing is maintained, the end of the first rivet 103 is press-riveted to form a rivet cap 1302 as shown in fig. 7 and 9, and the rivet cap 1302 is fitted into the rivet hole 124 to form a rivet structure, thereby firmly riveting the pole 10 and other members to the top cover 2.
Finally, the upper molding member 14 is formed by injection molding on the basis of the above riveting, so as to wrap the bracket 11 and the pole fixing portion 102 of the pole 10 therein, and only expose the upper surface of the pole portion 101.
In the riveting method, the bracket 11 or the upper molding 14 may include a structure or a processing method which can be omitted or formed by other alternative structures or processing methods.
Claims (10)
1. The riveting connection method of the pole is characterized by comprising the following steps:
step S1: a pole column hole (211) and a first through part (212) are arranged on the top cover sheet (2); a sealing member (13) with a third through part (134) and a riveting member (12) with a second riveting part (123) are arranged below the top cover plate (2);
step S2: matching a pole (10) with a first riveting piece (103) to the top cover plate (2) from top to bottom, wherein the end part of the first riveting piece (103) is used for punching and riveting after passing through the first through part (212), the third through part (134) and the riveting hole (124) in sequence;
step S3: the end part of the first riveting piece (103) is subjected to stamping processing to form a riveting cap (125), the riveting cap (125) is at least arranged in a protruding mode towards one side to be matched with the riveting hole (124) to form a riveting connection structure, and therefore the pole column (10), the top cover plate (2), the sealing piece (13) and the riveting piece (12) are riveted together.
2. The method for caulking and connecting a pole according to claim 1, wherein in step S1, a bracket (11) is further provided between the pole (10) and the top sheet (2), and the bracket (11) is provided with a second through-hole (115);
in step S2, the first rivet (103) passes through the second through-hole (115), the first through-hole (212), the third through-hole (134), and the rivet hole (124) in this order.
3. The method for riveting and connecting a pole according to claim 1, further comprising: step S4, after riveting of the S3 is completed, an upper plastic part (14) is further formed on the periphery of the pole (10) in an injection molding mode, and the outer side of the pole (10) or the bracket (11) is wrapped by the upper plastic part (14); wherein the content of the first and second substances,
the support (11) and the sealing element (13) are both made of insulating materials, so that the pole (10) and the top cover plate (2) are arranged in an insulating manner;
the pole (10) comprises a pole part (101) and a pole fixing part (102), and the first riveting part (103) is arranged on the lower surface of the pole fixing part (102);
the bracket (11) comprises a bracket main body (111) and a first through hole (112), a plurality of first insulating parts (114) are further arranged on the outer side of the bracket main body (111), and a second through part (115) is arranged on the first insulating parts (114);
the riveting piece (12) comprises a riveting piece main body (121) and a fourth through hole (122), and the second riveting part (123) is convexly formed on the upper surface of the riveting piece main body (121);
the sealing element (13) comprises a sealing element main body (131) and a second through hole (132), a second insulating element (133) is arranged on the upper surface of the sealing element main body (131) in a protruding mode, and a third through part (134) is arranged on the second insulating element (133) in a penetrating mode;
the upper plastic part (14) comprises an upper plastic part main body (141) and a third through hole (142), and the upper plastic part main body (141) is matched on the pole fixing part (102);
the first insulating part (114) or the second insulating part (133) is at least partially fitted in the first through-hole (212) to insulatively fit the first rivet (103) and the first through-hole (212).
4. The riveted pole connecting structure comprises a top cover plate (2), wherein at least one pole hole (211) is formed in the top cover plate (2), and a pole (10) is fixed to a pole mounting position (21) by a pole fixing structure to form a positive pole component (10a) or a negative pole component (10 b); it is characterized in that the preparation method is characterized in that,
the top cover plate (2) is also provided with at least one first through part (212), and the pole (10) comprises at least one first riveting piece (103);
the pole fixing structure comprises a riveting piece (12), a sealing piece (13) and an upper plastic piece (14), the riveting piece (12) is arranged below the top cover plate (2), and the sealing piece (13) is arranged between the riveting piece (12) and the top cover plate (2); a third through part (134) is arranged on the sealing element (13), a second riveting part (123) is arranged on the riveting element (12), and a riveting hole (124) is arranged on the second riveting part (123);
the first riveting piece (103) is sequentially provided with a first through part (212), a third through part (134) and a riveting hole (124), the end parts of the first through part, the third through part and the riveting hole (124) are punched and riveted to form a riveting cap (1032), the riveting cap (1032) acts on the riveting hole (124) to form a riveting structure, the pole (10) and the top cover plate (2) are insulated, and the upper molding piece (14) is formed on the periphery of the pole (10) in an injection molding mode.
5. The riveted post connection structure according to claim 1, characterized in that the post fixing structure comprises a bracket (11), the bracket (11) being arranged between the post (10) and the top cover plate (2); a second through part (115) is arranged on the bracket (11);
the end part of the first riveting piece (103) is punched and riveted to form a riveting cap (1032) after sequentially passing through the second through part (115), the first through part (212), the third through part (134) and the riveting hole (124);
the first through part (212), the second through part (115), the third through part (134) or the riveting hole (124) is a through hole or a notch which is arranged in a penetrating way;
the first rivet (103), the first through-hole (212), the second through-hole (115), or the third through-hole (134) has an arc-shaped cross-section.
6. The riveted post connection structure according to any one of claims 2 to 4, characterized in that the bracket (11) and the seal (13) are both made of insulating materials, so that the post (10) and the top cover plate (2) are arranged in an insulating manner;
the pole (10) comprises a pole part (101) and a pole fixing part (102), and the first riveting part (103) is arranged on the lower surface of the pole fixing part (102);
the bracket (11) comprises a bracket main body (111) and a first through hole (112), a plurality of first insulating parts (114) are further arranged on the outer side of the bracket main body (111), and a second through part (115) is arranged on the first insulating parts (114);
the riveting piece (12) comprises a riveting piece main body (121) and a fourth through hole (122), and the second riveting part (123) is convexly formed on the upper surface of the riveting piece main body (121);
the sealing element (13) comprises a sealing element main body (131) and a second through hole (132), a second insulating element (133) is arranged on the upper surface of the sealing element main body (131) in a protruding mode, and a third through part (134) is arranged on the second insulating element (133) in a penetrating mode;
the upper plastic part (14) comprises an upper plastic part main body (141) and a third through hole (142), and the upper plastic part main body (141) is matched on the pole fixing part (102);
the first insulating part (114) or the second insulating part (133) is at least partially fitted in the first through-hole (212) to insulatively fit the first rivet (103) and the first through-hole (212).
7. The riveted terminal connection structure according to claim 6, characterized in that a first insulation projection (116) is further formed on the lower surface of the first insulation portion (114) around the second through portion (115), the first insulation projection (116) being provided so as to project downward with respect to the first insulation portion (114); the outer diameter of the first insulating convex part (116) is smaller than or equal to the inner diameter of the first through part (212) so that the first insulating part (114) at least partially extends into the first through part (212);
a bracket convex part (113) which is convexly arranged relative to the lower surface of the bracket main body (111) is arranged around the first through hole (112); the bracket main body (111) separates the lower surface of the pole fixing part (102) and the upper surface of the concave ring part (213) to insulate the two, and the bracket convex part (113) separates the pole (10) from the first through hole (112) to insulate the two;
the second riveting part (123) is provided with a riveting hole (124) and a positioning part (126) which is convexly arranged around the riveting hole (124), and a riveting cavity (125) is concavely arranged below the second riveting part (123);
the upper plastic part main body (141) comprises a cavity part (146) formed by wrapping the pole fixing part (102) during injection molding;
the first riveting piece (103) and the first through part (212) are separated by a first insulating convex part (116) and a second insulating piece (133) for insulation;
the pole fixing part (102) comprises a first pole convex part (104) and a second pole convex part (105), the first pole convex part (104) is arranged in a protruding mode in the radial direction relative to the second pole convex part (105), a second notch (106) is formed between the first pole convex part (104) and the second pole convex part (105), and the upper plastic part (14) fills the second notch (106);
a first gap (117) is formed between the adjacent first insulating parts (114), the second pole projection (105) corresponds to the first gap (117), and the first pole projection (104) corresponds to the first insulating part (114);
go up and mould a main part (141) including first portion of moulding (143) and second and mould portion (144), first portion of moulding (143) and second utmost point post convex part (105) are corresponding, second mould portion (144) and first utmost point post convex part (104) are corresponding, first portion of moulding (143) including filling insulating part (145) that first breach (117) formed.
8. The riveted pole connecting structure according to claim 7, characterized in that a lower plastic part (4) is further arranged below the top cover plate (2), a plurality of first connecting parts (401) are arranged on the upper surface of the lower plastic part (4), a second connecting part is arranged on the lower surface of the top cover plate (2), and the first connecting parts (401) and the second connecting parts are in concave-convex fit to connect the lower plastic part (4) and the top cover plate (2); mould down and still be equipped with utmost point post cooperation portion (41) that correspond setting with utmost point post installation position (21) on piece (4), utmost point post cooperation portion (41) include fourth through-hole (411) and around utmost point post convex part (412) that fourth through-hole (411) set up.
9. Riveted pole connection according to claim 5, characterized in that the seal (13) is in a compressed state under pressure after riveting; the number of the first riveting pieces (103) is three and the first riveting pieces are uniformly arranged along the circumferential direction; the periphery of the pole column hole (211) is also provided with a concave ring part (213) which is concavely arranged on the upper surface of the top cover plate (2), and the first through part (212) is arranged on the concave ring part (213);
the sealing member (13) further comprises a second concave-convex portion (135) concavely arranged in the second insulating member (133), and the second riveting portion (123) is matched in the second concave-convex portion (135) for positioning;
the top cover plate (2) is an integrated top cover plate, two pole column holes (211) are respectively arranged at two ends of the top cover plate (2), and an explosion-proof valve port (23) and a liquid injection port (22) for arranging the explosion-proof valve (3) are arranged between the two pole column holes (211); the explosion-proof valve (3) comprises an explosion-proof valve plate (31) and a protective film (32); the explosion-proof valve plate (31) is matched with the explosion-proof valve port (23) from the lower part, and the protective film (32) is attached to the upper part of the explosion-proof valve port (23); or the explosion-proof valve plate (31) is integrally arranged on the top cover plate (2), and the protective film (32) is attached to the explosion-proof valve plate (31);
the support is the PPS material, and the sealing member is the fluororubber material.
10. A battery top cap, characterized in that it comprises a riveted post connection structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774483.5A CN115036652A (en) | 2022-07-01 | 2022-07-01 | Pole riveting connection method, pole connection structure and battery top cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210774483.5A CN115036652A (en) | 2022-07-01 | 2022-07-01 | Pole riveting connection method, pole connection structure and battery top cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115036652A true CN115036652A (en) | 2022-09-09 |
Family
ID=83129478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210774483.5A Withdrawn CN115036652A (en) | 2022-07-01 | 2022-07-01 | Pole riveting connection method, pole connection structure and battery top cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115036652A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115411467A (en) * | 2022-10-13 | 2022-11-29 | 宁波震裕科技股份有限公司 | Manufacturing method of riveted pole and battery top cover assembly |
-
2022
- 2022-07-01 CN CN202210774483.5A patent/CN115036652A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115411467A (en) * | 2022-10-13 | 2022-11-29 | 宁波震裕科技股份有限公司 | Manufacturing method of riveted pole and battery top cover assembly |
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Application publication date: 20220909 |
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