CN114937839A - Split type riveting top cap structure and battery - Google Patents

Split type riveting top cap structure and battery Download PDF

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Publication number
CN114937839A
CN114937839A CN202210651909.8A CN202210651909A CN114937839A CN 114937839 A CN114937839 A CN 114937839A CN 202210651909 A CN202210651909 A CN 202210651909A CN 114937839 A CN114937839 A CN 114937839A
Authority
CN
China
Prior art keywords
riveting
top cover
hole
pole
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202210651909.8A
Other languages
Chinese (zh)
Inventor
何世亚
梁鹤
陈冲
戴麒迪
吴孙光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Zhenyu New Energy Technology Co ltd
Original Assignee
Ningbo Zhenyu Auto Parts Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Zhenyu Auto Parts Co ltd filed Critical Ningbo Zhenyu Auto Parts Co ltd
Priority to CN202210651909.8A priority Critical patent/CN114937839A/en
Publication of CN114937839A publication Critical patent/CN114937839A/en
Withdrawn legal-status Critical Current

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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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • 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
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • 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
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides 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
    • H01M50/543—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
    • 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)
  • Materials Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The invention discloses a split riveting top cover structure and a battery, wherein the split riveting top cover structure comprises a positive pole top cover component and a negative pole top cover component which are arranged in a split mode, and a positive pole column or a negative pole column is assembled on a positive pole top cover sheet or a negative pole top cover sheet through a pole column riveting structure to form the positive pole top cover component and the negative pole top cover component; utmost point post riveted structure is including setting up the utmost point post fixed hole site on positive pole top cap piece or negative pole top cap piece, and utmost point post fixed hole site includes utmost point post hole and at least one riveting piece, and the riveting piece passes utmost point post and setting element in proper order and cooperates in riveting support piece with the riveting spacing.

Description

Split type riveting top cap structure and battery
Technical Field
The invention belongs to the technical field of power battery matching of new energy automobiles, and particularly relates to a split type riveting top cover structure and a battery.
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 besides being used for conducting electricity with the positive and negative pole edges of the battery core in the module, the pole 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 split riveting top cover structure which is easy to produce and has a firm structure and a battery with the structure.
The invention provides a split riveting top cover structure, which comprises a positive top cover assembly and a negative top cover assembly which are arranged in a split manner, wherein the positive top cover assembly comprises a positive top cover plate and a positive pole post, the negative top cover assembly comprises a negative top cover plate and a negative pole post, and the positive top cover plate and the negative top cover plate are respectively provided with a pole post assembling hole position for the arrangement of the positive pole post and the negative pole post; and the positive pole column or the negative pole column is assembled on the positive top cover plate or the negative top cover plate through a pole column riveting structure.
The pole riveting structure comprises pole fixing hole positions arranged on the positive pole top cover plate or the negative pole top cover plate, and the poles are matched with the pole fixing hole positions; the pole fixing hole position comprises a pole hole and at least one riveting piece arranged around the pole hole.
The sealing element, the pole column, the positioning element and the riveting support element are sequentially sleeved on the riveting element, the riveting element sequentially penetrates through a fifth riveting hole formed in the sealing element, a first riveting hole formed in the pole column and a second riveting hole formed in the positioning element and then is matched in a fourth riveting hole formed in the riveting support element, and the top end of the riveting element is riveted to form a riveting cap which acts on the fourth riveting hole to limit riveting.
Utmost point post riveting assembly structure still includes apron and support piece, and the apron joint is connected to on riveting support piece or the support piece, or forms on riveting support piece or support piece with injection moulding.
According to the split riveting top cover structure, the sealing element comprises a sealing element main body and a third through hole which is arranged in a penetrating manner, and a fifth riveting hole which is arranged in a penetrating manner is formed in the sealing element main body; the riveting piece penetrates through the fifth riveting hole, the first riveting hole and the second riveting hole in sequence and then is matched in the fourth riveting hole.
According to foretell split type riveting top cap structure, utmost point post includes utmost point post portion and a plurality of utmost point post location portion, is equipped with the first riveting hole that link up the setting on utmost point post location portion.
According to the split riveting top cover structure, the positioning piece comprises a first through hole and a plurality of first positioning parts, and at least one first positioning part is provided with a second riveting hole which is arranged in a penetrating manner.
According to foretell split type riveting top cap structure, support piece includes support piece main part and location chamber, and utmost point post and setting element at least some hold in the location intracavity, and riveting support piece sets up in support piece upper surface department.
The support main body further comprises a positioning part, and the first positioning part is matched with the positioning part.
According to the split riveting top cover structure, the riveting support piece comprises a riveting support piece main body, and a second through hole and a plurality of fourth riveting holes are penetratingly formed in the riveting support piece main body.
According to the split riveting top cover structure, the supporting piece and the top cover piece are in concave-convex fit for positioning.
According to foretell split type riveting top cap structure, the location chamber includes first location chamber and second location chamber, and first location chamber sets up with second location chamber correspondingly not.
According to foretell split type riveting top cap structure, utmost point post includes utmost point post portion and a plurality of utmost point post location portion, is equipped with the first riveting hole that link up the setting on utmost point post location portion.
According to the split riveting top cover structure, the positioning part comprises a first through hole and a plurality of first positioning parts, and at least one first positioning part (provided with a second riveting hole which is arranged in a penetrating manner).
According to the split type riveting top cover structure, the riveting support piece main body is further provided with a plurality of first connecting parts, the cover plate is correspondingly provided with second connecting parts, and the first connecting parts and the second connecting parts are matched to connect the cover plate to the riveting support piece.
According to foretell split type riveting top cap structure, the post portion sets up for utmost point post location portion upwards or the protruding ground that establishes downwards to form into utmost point post or utmost point post down.
According to the split riveting top cover structure, the positioning piece further comprises an insulating ring protruding around the first through hole.
According to the split riveting top cover structure, the number of the riveting pieces can be two, three, four or five, and each riveting piece is respectively in riveting fit with the corresponding first riveting hole, the second riveting hole and the fourth riveting hole.
According to the split riveting top cover structure, the first riveting hole and the second riveting hole are counter bores.
According to foretell split type riveting top cap structure, split type riveting top cap structure still moulds the piece under and including annotating liquid mouth, explosion-proof valve, annotates the liquid mouth and sets up on anodal top cap subassembly or negative pole top cap subassembly, and explosion-proof valve sets up on negative pole top cap subassembly or anodal top cap subassembly, moulds the piece down and sets up in anodal top cap piece or negative pole top cap piece below.
According to the split riveting top cover structure, the explosion-proof valve comprises the explosion-proof valve plate, and the explosion-proof valve plate is integrally arranged on the negative pole top cover plate or welded to the explosion-proof valve hole of the negative pole top cover plate.
According to the split type riveting top cover structure, the positive pole top cover assembly or the negative pole top cover assembly further comprises a lower plastic part, the lower plastic part is assembled on the lower surface of the top cover plate or formed on the lower surface of the top cover plate through injection molding, a buffer cavity is further arranged on the lower plastic part and arranged below the explosion-proof valve plate, and the buffer cavity comprises a plurality of buffer through holes.
According to the split riveting top cover structure, the sealing element and the positioning element are arranged around the side face of the pole.
According to the split riveting top cover structure, the cover plate, the fourth riveting hole of the riveting support piece, the second riveting hole of the positioning piece and the fifth riveting hole of the sealing piece jointly form a riveting piece cavity for accommodating a riveting piece.
According to the split type riveting top cover structure, the cover plate, the riveting supporting piece, the positioning piece and the sealing piece are made of insulating materials.
As a second aspect of the present invention, there is provided a battery comprising the above-described split type riveted top cover structure.
The split riveting top cover structure has the following beneficial effects:
1. the positive and negative pole posts are respectively arranged on different top cover sheets and can be matched with different batteries.
2. All the parts are sequentially placed on the top cover sheet and then riveted and assembled, the assembly process is simple, the requirements on equipment and sites are low, and the production efficiency is high.
3. The riveting support can be made of metal or alloy, such as SUS steel, and has high supporting structure strength and difficult deformation.
4. Except the plastic lower plastic part and the cover plate, other parts are all completed in one step through riveting, and stamping is adopted during riveting to form a riveting cap through riveting flanging.
5. The riveting support piece can be wholly or partially covered with an insulating layer through electrophoresis and other processes, and safety is improved.
6. After riveting is completed, the lower plastic part and the cover plate can be respectively arranged below or above the top cover plate in a clamping fit mode, a plastic molding mode and the like, or are assembled and connected after heating and hot melting after prefabrication and molding.
7. The positive and negative electrode posts are arranged on the same top cover sheet to form an integrated top cover structure, and can be assembled and processed simultaneously.
8. The explosion-proof valve can be arranged on the top cover sheet in a split welding or integrated forming mode.
Drawings
Fig. 1 is a schematic structural diagram of a positive electrode top cover of a split riveting top cover structure according to a first embodiment of the invention;
fig. 2 is a schematic structural diagram of a negative electrode top cover of the split riveting top cover structure in the first embodiment of the invention;
FIG. 3 is an exploded view of the structure of FIG. 1;
FIG. 4 is a schematic diagram of the construction of the top cover piece of the positive top cover of the embodiment of FIG. 1;
FIG. 5 is a schematic structural view of the lower plastic sheet of the positive top cover of the embodiment of FIG. 1;
FIG. 6 is an exploded schematic view of the structure of FIG. 2;
fig. 7 is a schematic structural view of the top cover sheet of the negative electrode top cover of the embodiment of fig. 1;
fig. 8 is a schematic structural diagram of a lower plastic sheet of the negative electrode top cap of the embodiment of fig. 1;
FIG. 9 is a schematic cross-sectional view of FIG. 4;
FIG. 10 is an enlarged partial schematic view of FIG. 5;
FIG. 11 is a schematic structural view of the seal of FIG. 1 or FIG. 2;
fig. 12 is a schematic structural view of the pole of fig. 1 or 2;
FIG. 13 is a schematic structural view of the positioning member of FIG. 1 or FIG. 2;
FIG. 14 is a schematic structural view of the support of FIG. 1 or FIG. 2;
FIG. 15 is a schematic structural view of the riveted support of FIG. 1 or 2;
FIG. 16 is a schematic view of the cover plate of FIG. 1 or FIG. 2;
FIG. 17 is a cross-sectional view of FIG. 12
FIG. 18 is a schematic cross-sectional view of the cover plate, riveted support, positioning member, post and seal of FIG. 1 or FIG. 2;
fig. 19 is a schematic structural view of a negative electrode top cover of the split riveting top cover structure of the second embodiment of the invention;
FIG. 20 is a schematic view of the construction of the top cover piece of the positive top cover of the embodiment of FIG. 19;
FIG. 21 is a cross-sectional view of FIG. 20;
fig. 22 is a schematic view of the rivet in accordance with the first or second embodiment, shown in a cylindrical shape, when the rivet is not assembled to form a rivet cap.
Detailed Description
In order that those skilled in the art will better understand the invention and thus more clearly define the scope of the invention as claimed, it is described in detail below with respect to certain specific embodiments thereof. It should be noted that the following 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 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.
Example one
As shown in fig. 1 and 2, the split-type riveted top cover structure includes a positive electrode top cover assembly 100 and a negative electrode top cover assembly 200 which are provided separately. Anodal top cap subassembly 100 includes anodal top cap piece 10c and anodal utmost point post 10a, and negative pole top cap subassembly 200 includes negative pole top cap piece 10d and negative pole post 10b, is equipped with utmost point post assembly hole site 21 on anodal top cap piece 10c and the negative pole top cap piece 10d respectively so that anodal utmost point post 10a and negative pole post 10b set up.
The positive electrode pole 10a or the negative electrode pole 10b is assembled to the positive electrode top cover sheet 10c or the negative electrode top cover sheet 10d through a pole riveting structure.
As shown in figure 1, the split riveted top cover structure further comprises a liquid injection port 5, an explosion-proof valve 3 and a lower plastic part 4. The liquid injection port 5 is used for injecting electrolyte into the battery, the explosion-proof valve 3 is used for playing an explosion-proof role, and the lower plastic piece 4 is used for being connected to the battery shell and is generally made of plastic with proper insulation.
As shown in fig. 6, the explosion-proof valve 3 includes an explosion-proof valve sheet 31, the explosion-proof valve sheet 31 is welded to the lower position of the explosion-proof valve hole 22 of the negative top cover plate 10d, and the protection film 32 is attached to the upper position of the explosion-proof valve hole 22.
As shown in fig. 7, the lower plastic part 4 is assembled on the lower surface of the top cover plate 2 or formed on the lower surface of the top cover plate 2 by injection molding, a buffer cavity 42 is further arranged on the lower plastic part 4, the buffer cavity 42 is arranged below the explosion-proof valve plate 31, and the buffer cavity 42 is provided with a plurality of through holes to buffer the pressure inside the battery.
The pouring port 5 is provided through the positive electrode top lid sheet 10c of the positive electrode top lid assembly 100 and the lower molding 4.
The post riveting assembly structure comprises post fixing hole positions 21 arranged on the positive top cover plate 10c and the negative top cover plate 10d, and the post 10 is matched with the post fixing hole positions 21 to form the positive post 10a and the negative post 10 b.
As shown in fig. 3, 4, 6 and 7, the pole fixing hole 21 includes a pole hole 25 and three rivets 26 disposed around the pole hole 25. Of course, the number of rivets 26 is not limited to the three shown in the figures, and fewer than one, two, or more than four, five, six, etc. are also possible.
In this embodiment, the pole fixing hole 21 is provided with an annular concave portion 24 recessed relative to the upper surface of the top cover plate 2, and the pole hole 25 and the rivet 26 are disposed on the annular concave portion 24. Moreover, the annular recess 24 is further provided with a first positioning portion 27, and a positioning member capable of being in concave-convex fit with the first positioning portion 27 is correspondingly arranged on the lower surface of the supporting member 13, so that when the supporting member 13 is placed on the top cover plate 2, the two positioning members are matched to position. For example, a positioning recess is provided on the annular recess 24 as the first positioning portion 27, and a second positioning portion 135 is correspondingly provided on the lower surface of the supporting member 13 as a positioning member.
As shown in fig. 3 and 6, the supporting member 13, the pole 10, and the positioning member 12 are sequentially sleeved on the riveting member 26, and the riveting supporting member 14 is disposed on the supporting member 13 and is matched with the riveting member 26. The riveting member 26 sequentially passes through the first riveting hole 103 formed in the terminal 10 and the second riveting hole 123 formed in the positioning member 12 and then fits into the fourth riveting hole 143 formed in the riveting support 14, and the top end of the riveting member 26 is riveted to form a riveting cap 261 to act on the fourth riveting hole 143 to achieve the purpose of riveting limitation, so that the riveting support 14, the support 13, the positioning member 12 and the terminal 10 are firmly riveted to the terminal fixing hole 21 on the positive top cover sheet 10c or the negative top cover sheet 10 d.
The forming of the riveting cap by riveting the top end (or called as the head) of the riveting member 26 means that the top end of the riveting member 26 is shaped in the stamping direction to expand the diameter thereof so as to act on the fourth riveting hole 143 of the riveting support 14 to form the riveted fit relationship. As shown in fig. 22, the rivet 26 may have a cylindrical shape when uncaptured, and a tip end thereof is press-flanged to form a rivet cap 261 when riveted.
As shown in fig. 3 and 6, a sealing member 11 is further disposed between the pole 10 and the pole fixing hole 21.
As shown in fig. 11, the sealing member 11 includes a sealing member main body 111 and a third through hole 112 penetrating therethrough, and the sealing member main body 111 is provided with a fifth riveting hole 113 penetrating therethrough; the riveting member 26 passes through the fifth riveting hole 113, the first riveting hole 103, and the second riveting hole 123 in sequence and then fits in the fourth riveting hole 143.
As shown in fig. 11, the sealing member 11 further includes an insulating ring 114 surrounding the fifth riveting hole 113 and protruding from the sealing member main body 111, and the insulating ring 114 is sleeved outside the riveting member 26 and is fitted into the first riveting hole 103 to isolate the terminal 10 from the riveting member 26, so as to improve the insulation of the terminal.
As shown in fig. 12, the electrode post 10 includes a post portion 101 and three electrode post positioning portions 102 uniformly distributed around the post portion 101, a first riveting hole 103 is formed in the electrode post positioning portion 102, and an inner diameter of the first riveting hole 103 is greater than or equal to an outer diameter of the insulation ring 114.
As shown in fig. 13, the positioning member 12 includes a first through hole 121 and three first positioning portions 122 evenly distributed around the first through hole 121, and a second riveting hole 123 is formed through each first positioning portion 122. The positioning element 12 further includes an insulating ring 124 surrounding the first through hole 121 and protruding relative to the first positioning portion 122, and the insulating ring 124 is used for surrounding the upper pole 1011 of the pole 10 to improve insulation.
As shown in fig. 14, the supporting member 13 includes a supporting member main body 131, a positioning cavity 132 is disposed on the supporting member main body 131 and penetrates up and down, the positioning cavity 132 is configured to accommodate at least a portion of each of the positioning member 12, the pole post 10, and the sealing member 11 therein, and the riveting supporting member 14 is disposed on an upper surface of the supporting member 13. Wherein, the supporting member 13 and the top cover plate 2 are engaged with each other in a concave-convex manner for positioning, that is, the supporting member 13 is engaged with the second positioning portion 135 on the lower surface of the supporting member 13 for positioning through the first positioning portion 27 provided on the top cover plate 2.
The positioning cavity 132 includes a first positioning cavity 1321 and a second positioning cavity 1322, and the first positioning cavity 1321 and the second positioning cavity 1322 are not correspondingly disposed, and the shapes of the two are not completely the same. In this embodiment, second positioning chamber 1322 is disposed slightly larger than first positioning chamber 1321. The first positioning cavity 1321 is configured to accommodate at least a portion of the sealing member 11, and the second positioning cavity 1322 is configured to accommodate all or a portion of the pole 10 and the positioning member 12, so as to form a matching state as shown in fig. 15.
In this embodiment, the shapes of the first positioning cavity 1321 and the second positioning cavity 1322 are different, that is, the shapes of the two positioning cavities are the same in a part of the region, and the shapes of the two positioning cavities are different in another part.
Preferably, as shown in fig. 18, the through holes as the first riveting hole (103) and the second riveting hole (123) are both sinking type structures (i.e. counter bores) to make the riveted structure firm.
As shown in fig. 15, the rivet support 14 includes a rivet support body 141, and a second through hole 142 and a plurality of fourth rivet holes 143 are formed through the rivet support body 141. In addition, the riveting support body 141 is further provided with a plurality of sixth riveting holes 144 penetrating therethrough. In this embodiment, the riveting support 14 is preferably made of metal or alloy, so as to have strong structural rigidity, and thus have strong structural strength after riveting and are not easy to deform. Preferably, the riveting support 14 may be covered with an insulating layer on a surface or a partial surface thereof by an electrophoresis process so as not to be directly connected to the top cover sheet, thereby improving the insulating property.
As shown in fig. 3, 6 and 16, the post riveting assembly structure further includes a cover plate 15, the cover plate 15 includes a cover plate main body 151 and a post connection hole 152, and the post connection hole 152 is penetratingly disposed to allow the post 10 to be exposed. The cover plate 15 is provided on a lower surface thereof with second connection portions 153, and the first connection portions 144 and the second connection portions 153 are connected to connect the cover plate 15 to the rivet support 14.
In this embodiment, the cover plate 15 is further provided with a fifth positioning portion 154, which is used to be fitted into a concave hole formed by the riveting member 26 after riveting to be positioned in a concave-convex manner.
In this embodiment, the cover plate 15 is connected to the riveted support 14 by snapping. Of course, in other embodiments, it is also possible to form the cover plate 15 on the riveting support 14 by injection molding.
As shown in fig. 17, the pole portion 101 is provided to protrude upward or downward with respect to the pole positioning portion 102 so as to form an upper pole 1011 or a lower pole 1012.
As shown in fig. 3 to 11, the lower plastic parts 4 of the positive electrode top cover assembly 100 and the negative electrode top cover assembly 200 are respectively provided with a positioning connection portion 41, the positioning connection portion 41 includes a tab hole 47 penetrating through the tab hole 47 and a positioning platform 43 surrounding the tab hole 47 and protruding from the upper surface of the lower plastic part 4, and the positioning platform 43 is provided with a first connection member 44 and a fourth positioning portion 45. And a third positioning part 28 and a second connecting piece 29 are correspondingly arranged below the positive top cover plate 10c and the negative top cover plate 10 d. The edge of the pole lug hole 47 is also provided with a second insulation ring 46 which is arranged in a protruding way, and the second insulation ring 46 is used for extending into the pole column hole 25 so as to ensure that the pole lug is not in contact conduction with the top cover plate 2.
In this embodiment, the first connecting member 44 is a connecting convex pillar having a connecting cap at an end portion thereof, the fourth positioning portion 45 is a positioning hole that is not penetrated, the third positioning portion 28 is a positioning pillar protruded on the lower surfaces of the positive top cover piece 10c and the negative top cover piece 10d, and the second connecting member 29 is a connecting concave hole recessed in the rivet 26. The first connecting member 144 is engaged with the second connecting member 29, and the fourth positioning portion 45 is engaged with the third positioning portion 28 for positioning.
As shown in fig. 10, the second connector 29 is a non-through recessed hole recessed in the rivet 26, and includes a recessed hole 291, a communicating portion 292, and an enlarged diameter portion 293, the recessed hole 291 has a guide surface, and the communicating portion 292 has an inner diameter smaller than an outer diameter of the enlarged diameter portion 293 so that the connecting cap of the first connector 44 can be engaged with the communicating portion 292 to be locked in the enlarged diameter portion 293.
As shown in fig. 18, the second connection portion 153 of the cover plate 15 is received in the seventh riveting hole 134 after passing through the sixth riveting hole 144, and since the riveting support 14 and the support 13 are riveted and fixed, and the inner diameter of the seventh riveting hole 134 is larger than that of the sixth riveting hole 144, the seventh riveting hole 134 and the sixth riveting hole 144 are formed to be engaged with each other to form a snap.
As shown in fig. 18, the sealing member 11 and the positioning member 12 surround the side of the pole 10 to insulate it from the top cover plate 2, and the upper and lower surfaces of the pole 10 are used for external electrical connection and internal electrical connection with a tab (not shown in the drawings), respectively. The cover plate 15, the fourth riveting hole 143 of the riveting support 14, the second riveting hole 123 of the positioning member 12 and the fifth riveting hole 113 of the sealing member 11 together form a riveting chamber 262 for receiving the riveting member 26. The cover plate 15, the riveting support 14, the positioning member 12 and the sealing member 11 are made of insulating materials, such as plastic, rubber (e.g., silica gel) and other polymer materials.
In this embodiment, the top cover plate 2 is made of an aluminum alloy, the rivet 26 is welded or formed thereon, the electrode post 10 is made of a metal or an alloy, the positive and negative electrode posts are made of different materials, the sealing member 11 is made of a rubber material, the lower plastic member 4, the cover plate 15, the positioning member 12 and the supporting member 13 are made of plastic materials, and the rivet supporting member 14 is made of SUS304 (surface-covering insulating paint).
The process of assembling the riveted structure of the embodiment is as follows:
firstly, sequentially placing a support 13, a riveting sealing element 11, a pole 10, a positioning element 12 and a riveting support 14 in a pole fixing hole 21 of a top cover plate 2; at this time, the rivet 26 is in an uncapped state, as shown in fig. 19.
Next, the rivet 26 is subjected to a riveting process so that the tip thereof is caulked to form a rivet cap 261, thereby being brought into a riveting relationship with the fourth riveting hole 143.
Finally, the lower plastic part 4 and the cover plate 15 are respectively matched below and above the top cover plate 2, and the lower plastic part 4 or the cover plate 15 can be formed by clamping and matching or injection molding.
Example two
As shown in fig. 19 to 21, a split riveted top cover structure has the same main structure as the first embodiment except that: the explosion-proof valve sheet 31 of the present embodiment is integrally provided to the negative electrode top lid piece 10 d.
This can be achieved during the molding of the negative electrode top sheet 10 d.
EXAMPLE III
A top cover of the battery adopts an integrated battery top cover structure of the first embodiment or the second embodiment.

Claims (10)

1. The split riveting top cover structure comprises a positive pole top cover assembly (100) and a negative pole top cover assembly (200) which are arranged in a split mode, wherein the positive pole top cover assembly (100) comprises a positive pole top cover plate (10c) and a positive pole post (10a), the negative pole top cover assembly (200) comprises a negative pole top cover plate (10d) and a negative pole post (10b), and pole post assembling hole positions (21) are respectively arranged on the positive pole top cover plate (10c) and the negative pole top cover plate (10d) to enable the positive pole post (10a) and the negative pole post (10b) to be arranged; the positive pole post (10a) or the negative pole post (10b) is assembled on the positive pole top cover plate (10c) or the negative pole top cover plate (10d) through a post riveting structure; it is characterized in that the preparation method is characterized in that,
the pole riveting structure comprises a pole fixing hole (21) arranged on the positive pole top cover plate (10c) or the negative pole top cover plate (10d), and the pole (10) is matched with the pole fixing hole (21); the pole fixing hole position (21) comprises a pole hole (25) and at least one riveting piece (26) arranged around the pole hole (25);
the sealing element (11), the pole (10), the positioning element (12) and the riveting support (14) are sequentially sleeved on the riveting element (26), the riveting element (26) sequentially penetrates through a fifth riveting hole (113) formed in the sealing element (11), a first riveting hole (103) formed in the pole (10) and a second riveting hole (123) formed in the positioning element (12) and then is matched in a fourth riveting hole (143) formed in the riveting support (14), and the top end of the riveting element (26) is riveted to form a riveting cap (261) which acts on the fourth riveting hole (142) to rivet and limit;
utmost point post riveting assembly structure still includes apron (15) and support piece (13), and apron (15) joint is connected to on riveting support piece (14) or support piece (13), or is formed on riveting support piece (14) or support piece (13) with injection moulding.
2. The split riveted top cover structure according to claim 1, wherein the seal (11) comprises a seal main body (111) and a third through hole (112) arranged therethrough, and a fifth riveting hole (113) arranged therethrough is provided on the seal main body (111); the riveting piece (26) penetrates through the fifth riveting hole (113), the first riveting hole (103) and the second riveting hole (123) in sequence and then is matched in the fourth riveting hole (143).
3. The split riveted cap structure according to claim 1, characterized in that the support (13) comprises a support body (131) and a positioning cavity (132); at least a part of the pole (10) and the positioning part (12) are accommodated in the positioning cavity (132), and the riveting support (14) is arranged on the upper surface of the support (13);
the riveting support (14) comprises a riveting support body (141), and a second through hole (142) and a plurality of fourth riveting holes (143) are penetratingly arranged on the riveting support body (141);
the supporting piece (13) is in concave-convex fit with the top cover plate (2) for positioning; the positioning cavity (132) comprises a first positioning cavity (1321) and a second positioning cavity (1322), and the first positioning cavity (1321) and the second positioning cavity (1322) are not correspondingly arranged;
the pole (10) comprises a pole column part (101) and a plurality of pole column positioning parts (102), wherein the pole column positioning parts (102) are provided with first riveting holes (103) which are arranged in a run-through manner;
the positioning piece (12) comprises a first through hole (121) and a plurality of first positioning parts (122), and at least one first positioning part (122) is provided with a second riveting hole (123) which is arranged in a penetrating manner.
4. The structure of the riveting top cover of claim 3, wherein the riveting support body (141) is further provided with a plurality of first connecting portions (144), the cover plate (15) is correspondingly provided with second connecting portions (153), and the first connecting portions (144) and the second connecting portions (153) are matched to connect the cover plate (15) to the riveting support (14).
5. The split riveted top cover structure according to any one of claims 1 to 4, characterized in that the pole part (101) is arranged in an upwardly or downwardly protruding manner relative to the pole positioning part (102) to form an upper pole (1011) or a lower pole (1012);
the positioning piece (12) further comprises an insulating ring (124) which is arranged around the first through hole (121) in a protruding mode;
the riveting pieces (26) are two, three, four or five, and each riveting piece (26) is respectively in riveting fit with the corresponding first riveting hole (103), second riveting hole (123) and fourth riveting hole (143); the first riveting hole (103) and the second riveting hole (123) are counter bores.
6. The split riveting top cover structure according to any one of claims 1-4, wherein the split riveting top cover structure further comprises a liquid injection port (5), an explosion-proof valve (3) and a lower plastic part (4), the liquid injection port (5) is arranged on the positive electrode top cover component (100) or the negative electrode top cover component (200), the explosion-proof valve (3) is arranged on the negative electrode top cover component (200) or the positive electrode top cover component (100), and the lower plastic part (4) is arranged below the positive electrode top cover piece (10c) or the negative electrode top cover piece (10 d).
7. The split riveting top cover structure according to claim 6, wherein the explosion-proof valve (3) comprises an explosion-proof valve sheet (31), and the explosion-proof valve sheet (31) is integrally arranged on the negative top cover sheet (10d) or welded to the explosion-proof valve hole (22) of the negative top cover sheet (10 d);
anodal top cap subassembly (100) or negative pole top cap subassembly (200) still include down mould piece (4), mould down and mould piece (4) and assemble on top cap piece (4) lower surface or mould plastics and form on top cap piece (2) lower surface, mould down and still be equipped with cushion chamber (41) on piece (2), the cushion chamber sets up in explosion-proof valve block (31) below, and the cushion chamber includes a plurality of buffering through-holes.
8. The split riveted cap structure according to claim 5, characterized in that the seal (11) and the locating piece (12) are arranged around the side of the pole (10); the cover plate (15), the fourth riveting hole (143) of the riveting support (14), the second riveting hole (123) of the positioning piece (12) and the fifth riveting hole (113) of the sealing piece (11) jointly form a riveting piece cavity (262) for accommodating a riveting piece (26).
9. The structure of claim 5, wherein the cover plate (15), the riveting support (14), the positioning member (12) and the sealing member (11) are made of insulating materials.
10. A battery comprising the split riveted cap structure of any one of claims 1 to 9.
CN202210651909.8A 2022-06-09 2022-06-09 Split type riveting top cap structure and battery Withdrawn CN114937839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210651909.8A CN114937839A (en) 2022-06-09 2022-06-09 Split type riveting top cap structure and battery

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115401855A (en) * 2022-09-01 2022-11-29 宁波震裕科技股份有限公司 Punching-riveting injection molding processing method for battery top cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115401855A (en) * 2022-09-01 2022-11-29 宁波震裕科技股份有限公司 Punching-riveting injection molding processing method for battery top cover

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