CN115458845A - Battery top cap subassembly and power battery - Google Patents
Battery top cap subassembly and power battery Download PDFInfo
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- CN115458845A CN115458845A CN202211257920.2A CN202211257920A CN115458845A CN 115458845 A CN115458845 A CN 115458845A CN 202211257920 A CN202211257920 A CN 202211257920A CN 115458845 A CN115458845 A CN 115458845A
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- 238000009413 insulation Methods 0.000 claims description 25
- 238000009434 installation Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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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
- H01M50/147—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
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- 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
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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
- H01M50/50—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
- H01M50/586—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
-
- 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
- H01M50/593—Spacers; Insulating plates
-
- 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 provides a battery top cover assembly and a power battery, and belongs to the technical field of new energy batteries. The battery top cover assembly comprises a top cover sheet body, a positive pole riveting block, a negative pole riveting block, a positive pole insulating plate, a negative pole insulating plate, a positive pole column and a negative pole column. The top cover sheet body is provided with a first mounting groove and a second mounting groove, a first limiting protrusion is arranged in the first mounting groove, and a second limiting protrusion is arranged in the second mounting groove. The positive pole penetrates through the first mounting groove and the positive insulating plate in sequence and is riveted with the positive riveting block, and the negative pole penetrates through the second mounting groove and the negative insulating plate in sequence and is riveted with the negative riveting block. The battery top cover assembly can solve the problems that in the related art, a riveting block structure on a battery top cover is high in manufacturing cost and poor in torsion resistance.
Description
Technical Field
The invention relates to the technical field of new energy batteries, in particular to a battery top cover assembly and a power battery.
Background
The problems of environmental pollution and energy shortage are highlighted in recent years. The lithium ion power battery has been widely used in the fields of communication and electronic devices, energy storage power stations, new energy vehicles and the like due to the advantages of environmental protection, high energy density, low self-discharge, long cycle life and the like, and plays an important role in improving the energy utilization rate and protecting the environment.
In the correlation technique, power battery's utmost point post sets up on top cap structure usually, utmost point post is usually through setting up the plastic part in the inside and outside both sides of top cap, and realize with top cap fixed connection outside the top cap welding riveting piece, and for better fixed utmost point post, prevent that utmost point post from receiving the exogenic action to rotate, can set up cooperation structures such as special-shaped pottery anti-twist fixing post respectively on positive negative pole riveting piece usually and come to cooperate the installation with the trompil that corresponds on the apron, the realization is to the anti-twist function of riveting piece.
The riveting blocks with different shapes manufactured in the related technology are adopted to meet the twisting prevention function of the positive and negative riveting blocks, and the special-shaped structures of the riveting blocks are often required to be respectively provided with a set of die to respectively manufacture the positive and negative riveting blocks, so that the number of working procedures is increased, and the manufacturing cost is high. Meanwhile, the anti-twisting of the riveting block generally depends on the flanges around the plastic part matched with the riveting block and the matching hard contact of the anti-twisting fixing column and the top cover, the structure is complex, the assembly clearance is large, and the ceramic anti-twisting fixing column is easy to damage after being used for a long time, so that the anti-twisting capability is poor.
Disclosure of Invention
The embodiment of the invention provides a battery top cover assembly and a power battery, which can solve the problems that in the related art, a riveting block structure on a battery top cover is high in manufacturing cost and poor in twisting prevention capability. The technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a battery top cover assembly, including:
a top cover sheet body, a positive pole riveting block, a negative pole riveting block, a positive pole insulating plate, a negative pole insulating plate, a positive pole column and a negative pole column,
the top cover sheet body is provided with a first side surface and a second side surface which are oppositely arranged, a first mounting groove and a second mounting groove are arranged on the first side surface at intervals, a first limiting bulge is convexly arranged on the side wall of the first mounting groove, a second limiting bulge is convexly arranged on the side wall of the second mounting groove,
the positive pole insulating plate is arranged in the first mounting groove, one side face of the positive pole insulating plate is provided with a first groove matched with the first limiting protrusion, the other side face of the positive pole insulating plate is provided with a first limiting groove, a first anti-torsion protrusion is convexly arranged on the side wall of the first limiting groove, the positive pole riveting block is arranged in the first limiting groove and is provided with a second groove matched with the first anti-torsion protrusion, and the positive pole sequentially penetrates through the bottom wall of the first mounting groove, the positive pole insulating plate and is riveted with the positive pole riveting block;
the negative pole insulation board install in the second mounting groove, a side of negative pole insulation board have with the spacing protruding matched with third recess of second, the another side of negative pole insulation board has the second spacing groove, the protrusion is provided with the second on the lateral wall of second spacing groove and prevents turning round the arch, negative pole riveting piece install in the second spacing groove, negative pole riveting piece have with the second prevents turning round protruding assorted fourth recess, the negative pole post runs through in proper order the diapire of second mounting groove the negative pole insulation board and with the riveting of negative pole riveting piece.
Optionally, two first limiting protrusions are arranged in the first mounting groove, and the two first limiting protrusions are symmetrically arranged on opposite side walls of the first mounting groove; the second mounting groove is internally provided with two second limiting bulges, and the two second limiting bulges are symmetrically arranged on the opposite side walls of the second mounting groove.
Optionally, the profile of the first stopper protrusion is different from the profile of the second stopper protrusion.
Optionally, the first torsion-proof protrusion and the first groove are integrally formed in a punch forming mode; the second torsion-proof protrusion and the second groove are integrally formed in a punching mode.
Optionally, the top cover sheet body is further provided with an explosion-proof valve mounting hole, and the explosion-proof valve mounting hole is located between the first mounting groove and the second mounting groove.
Optionally, the positive post includes a first post body and a second post body which are sequentially connected, the first post body is used for being inserted into the top cover sheet body and the positive insulating plate, the first post body is used for being inserted into the positive riveting block, the diameter of the first post body is larger than that of the second post body, the second post body is coaxial with the first post body, a first annular boss is arranged on an end face, connected with the second post body, of the first post body, the first annular boss is arranged around the second post body, and a first annular groove is formed in the second post body; the negative pole post is including the third cylinder and the fourth cylinder that connect gradually, the third cylinder is used for wearing to locate the top cap lamellar body with in the positive insulation board, the fourth cylinder is used for wearing to locate in the positive riveting piece, the diameter of third cylinder is greater than the fourth cylinder, the third cylinder with the fourth cylinder is coaxial, the third cylinder with second annular boss has on the terminal surface of fourth cylinder connection, second annular boss centers on the fourth cylinder arranges, second annular groove has on the fourth cylinder.
Optionally, the side walls of the first cylinder and the third cylinder are sleeved with insulating seal rings.
Optionally, the length of the insulating sealing ring in the axial direction of the first cylinder is greater than the length of the first cylinder; the length of the insulating sealing ring in the axial direction of the third column is greater than that of the third column.
In a second aspect, an embodiment of the present invention further provides a power battery, which includes the battery pack of the first aspect and a lower case, and the top cover sheet of the battery top cover assembly is covered on the lower case.
Optionally, a plastic structural member matched with the opening of the lower shell is convexly arranged on the second side surface.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
in the use after the assembly is accomplished, except that the cell wall that utilizes first spacing groove and second spacing groove carries out spacing fixed basis as the flange to anodal riveting piece and negative pole riveting piece, first anti-twist bulge and second are prevented turning round protruding spacing fixed that can realize anodal riveting piece and negative pole riveting piece respectively, guarantee with anodal riveting piece fixed connection's anodal post and with the installation fastening of negative pole riveting piece fixed connection's negative pole post, avoid taking place relative rotation with the top cap piece body under the exogenic action, anodal riveting piece and negative pole riveting piece's anti-twist ability has further been improved.
Meanwhile, compared with the related art, the battery top cover assembly provided by the embodiment of the invention only improves the forming structures of the anode insulating plate and the cathode insulating plate, and the top cover sheet body, the anode riveting block and the cathode riveting block are provided with the structures matched with the anode insulating plate and the cathode insulating plate, so that the problems of high manufacturing cost and poor torsion resistance of the riveting block structure on the battery top cover in the related art can be solved. The positive electrode riveting block and the negative electrode riveting block have the same structure, and can be manufactured by adopting the same die and process, so that the manufacturing cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an exploded perspective view of a battery top cap assembly according to an embodiment of the present invention;
fig. 2 is a schematic view of an assembly structure of the top cover sheet, the positive pole and the negative pole provided by the embodiment of the invention;
FIG. 3 is a schematic view of a partial enlarged structure as at A in FIG. 2;
FIG. 4 is a schematic view of a partial enlarged structure as at B in FIG. 2;
FIG. 5 is a schematic diagram of a side view of a battery top cover assembly according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of an anode insulating sheet according to an embodiment of the present invention;
fig. 7 is a schematic bottom structure diagram of an anode insulation sheet provided in an embodiment of the present invention;
fig. 8 is a schematic perspective view of an anode insulating sheet according to an embodiment of the present invention;
fig. 9 is a schematic bottom structure view of the negative electrode insulation sheet provided in the embodiment of the present invention;
fig. 10 is a schematic structural diagram of a positive electrode insulation sheet provided in an embodiment of the present invention;
fig. 11 is a schematic structural diagram of an anode insulating sheet according to an embodiment of the present invention;
fig. 12 is a structural sectional view of a positive electrode post provided in an embodiment of the present invention;
fig. 13 is a partial structural cross-sectional view of a battery top cap assembly provided by an embodiment of the present invention;
fig. 14 is a structural sectional view of a negative electrode post provided in an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a power battery according to an embodiment of the present invention.
In the figure:
1-a top cover sheet body; 1 a-a first side; 1 b-a second side; 2-positive pole riveting block; 3-a negative pole riveting block; 4-a positive insulating plate; 5-negative electrode insulating plate; 6-positive pole column; 7-a negative pole post; 8-insulating sealing ring; 9-a lower shell; 11-a first mounting groove; 12-a second mounting groove; 13-explosion-proof valve mounting hole; 14-plastic structural members; 21-a second groove; 31-a fourth groove; 41-a first groove; 42-a first limit groove; 51-a third groove; 52-a second restraint slot; 61-a first cylinder; 62-a second column; 71-a third column; 72-a fourth cylinder; 111-a first stop lobe; 121-a second stop protrusion; 421-a first anti-twist bump; 521-a second anti-twist bulge; 611-a first annular boss; 621-a first annular groove; 711-a second annular boss; 721-a second annular groove; a-an explosion-proof valve; b-explosion-proof valve protection plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the correlation technique, power battery's utmost point post sets up on top cap structure usually, utmost point post is usually through setting up the plastic part in the inside and outside both sides of top cap, and realize with top cap fixed connection in top cap outside welding riveting piece, and for better fixed utmost point post, prevent that utmost point post from receiving external force to act on the life and rotate, can set up the cooperation structures such as special-shaped pottery anti-torque fixing column respectively on positive negative pole riveting piece usually and come to cooperate the installation with the trompil that corresponds on the apron, the realization is to the anti-torque function of riveting piece.
The riveting blocks with different shapes manufactured in the related technology are adopted to meet the twisting prevention function of the positive and negative riveting blocks, and the special-shaped structures of the riveting blocks are often required to be respectively provided with a set of die to respectively manufacture the positive and negative riveting blocks, so that the process is increased, and the manufacturing cost is high. Meanwhile, the anti-twisting of the riveting block generally depends on the flanges around the plastic part matched with the riveting block and the matching hard contact of the anti-twisting fixing column and the top cover, the structure is complex, the assembly clearance is large, and the ceramic anti-twisting fixing column is easy to damage after being used for a long time, so that the anti-twisting capability is poor.
Fig. 1 is an exploded perspective view of a battery top cap assembly according to an embodiment of the present invention. Fig. 2 is a schematic view of an assembly structure of the top cover sheet, the positive pole and the negative pole provided by the embodiment of the invention. Fig. 3 is a partially enlarged schematic view of a structure as shown at a in fig. 2. Fig. 4 is a partially enlarged structural view as at B in fig. 2. Fig. 5 is a schematic side view of a battery top cover assembly according to an embodiment of the invention. Fig. 6 is a schematic perspective view of an anode insulating sheet according to an embodiment of the present invention. Fig. 7 is a schematic bottom structure view of the anode insulating sheet according to the embodiment of the present invention. Fig. 8 is a schematic perspective view of an anode insulating sheet according to an embodiment of the present invention. Fig. 9 is a schematic bottom structure view of the negative electrode insulation sheet according to the embodiment of the present invention. Fig. 10 is a schematic structural diagram of a positive electrode insulation sheet according to an embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an anode insulating sheet according to an embodiment of the present invention. Fig. 12 is a structural sectional view of a positive electrode post according to an embodiment of the present invention. Fig. 13 is a partial structural sectional view of a battery top cap assembly according to an embodiment of the present invention. Fig. 14 is a structural cross-sectional view of a negative electrode tab provided in an embodiment of the present invention. As shown in fig. 1 to 14, by practice, the present applicant provides a battery top cap assembly including a top cap sheet 1, a positive rivet block 2, a negative rivet block 3, a positive insulating plate 4, a negative insulating plate 5, a positive post 6, and a negative post 7.
The top cover sheet body 1 is provided with a first side surface 1a and a second side surface 1b which are oppositely arranged, and a first mounting groove 11 and a second mounting groove 12 are arranged on the first side surface 1a at intervals. A first limiting protrusion 111 is convexly arranged on the side wall of the first mounting groove 11, and a second limiting protrusion 121 is convexly arranged on the side wall of the second mounting groove 12.
The positive insulating plate 4 is installed in the first installation groove 11, and a side surface of the positive insulating plate 4 is provided with a first groove 41 matched with the first limiting protrusion 111. The other side surface of the anode insulating plate 4 is provided with a first limiting groove 42, and a first anti-twisting bulge 421 is convexly arranged on the side wall of the first limiting groove 42. The positive riveting block 2 is installed in the first limiting groove 42, and the positive riveting block 2 is provided with a second groove 21 matched with the first anti-twisting bulge 421. The positive pole 6 sequentially penetrates through the bottom wall of the first mounting groove 11, the positive insulating plate 4 and is riveted with the positive riveting block 2.
The negative electrode insulating plate 5 is installed in the second installation groove 12, and a side surface of the negative electrode insulating plate 5 is provided with a third groove 51 matched with the second limiting protrusion 121. The other side of the negative insulating plate 5 is provided with a second limiting groove 52, and a second anti-twisting bulge 521 is convexly arranged on the side wall of the second limiting groove 52. The negative pole riveting block 3 is installed in the second limiting groove 52, and the negative pole riveting block 3 is provided with a fourth groove 31 matched with the second torsion-proof protrusion 521. The negative pole post 7 sequentially penetrates through the bottom wall of the second mounting groove 12, the negative pole insulation plate 5 and is riveted with the negative pole riveting block 3.
In the present embodiment, the first side 1a of the top cover sheet 1 may serve as an end surface of the battery located outside after assembly. When the battery top cover assembly is assembled, firstly, the anode insulating plate 4 and the cathode insulating plate 5 are respectively assembled in the first mounting groove 11 and the second mounting groove 12 in a matching manner, wherein the first groove 41 on one side surface of the anode insulating plate 4 can be clamped on the first limiting protrusion 111 in the first mounting groove 11 in a matching manner, and the second groove 21 on one side surface of the cathode insulating plate 5 can be clamped on the second limiting protrusion 121 in the second mounting groove 12 in a matching manner. The first limiting protrusion 111 and the second limiting protrusion 121 can respectively limit and fix the positive insulating plate 4 and the negative insulating plate 5, and the assembly stability is guaranteed. Then, the positive riveting block 2 and the negative riveting block 3 are respectively assembled in the first limiting groove 42 and the second limiting groove 52 in a matching manner, the first anti-twisting protrusion 421 in the first limiting groove 42 is clamped into the second groove 21 on the positive riveting block 2, and the second anti-twisting protrusion 521 in the second limiting groove 52 is clamped into the fourth groove 31 of the negative riveting block 3. All possess on the diapire of first mounting groove 11, anodal insulation board 4 and the anodal riveting piece 2 with anodal post 6 assorted riveting through-hole, anodal post 6 can run through the diapire of first mounting groove 11, anodal insulation board 4 and rivet with anodal riveting piece 2 in proper order by second side 1b one side. The bottom wall of the second mounting groove 12, the negative electrode insulating plate 5 and the negative electrode riveting block 3 are all provided with riveting through holes matched with the negative electrode posts 7, and the negative electrode posts 7 can sequentially penetrate through the bottom wall of the second mounting groove 12 and the negative electrode insulating plate 5 from one side of the second side surface 1b and are riveted with the negative electrode riveting block 3.
In the use after the assembly is completed, except for utilizing the groove walls of the first limiting groove 42 and the second limiting groove 52 as flanges to limit and fix the positive riveting block 2 and the negative riveting block 3, the first anti-torsion bulge 421 and the second anti-torsion bulge 521 can respectively limit and fix the positive riveting block 2 and the negative riveting block 3, ensure the positive post 6 fixedly connected with the positive riveting block 2 and the negative post 7 fixedly connected with the negative riveting block 3 to be installed and fastened, avoid relative rotation with the top cover sheet body 1 under the action of external force, and further improve the anti-torsion capacity of the positive riveting block 2 and the negative riveting block 3. Meanwhile, compared with the related art, the battery top cover assembly provided by the embodiment of the invention can solve the problems of high manufacturing cost and poor torsion resistance of the riveting block structure on the battery top cover in the related art only by improving the forming structures of the anode insulating plate 4 and the cathode insulating plate 5 and arranging the structures matched with the top cover sheet body, the anode riveting block 2 and the cathode riveting block 3. The positive riveting block 2 and the negative riveting block 3 have the same structure, and can be manufactured by adopting the same die and process, so that the manufacturing cost is reduced.
Illustratively, in the embodiment of the invention, the positive electrode riveting block 2 and the negative electrode riveting block 3 are both made of copper or aluminum and made of soft metal structural members.
Optionally, two first limiting protrusions 111 are arranged in the first mounting groove 11, and the two first limiting protrusions 111 are symmetrically arranged on opposite sidewalls of the first mounting groove 11; the second mounting groove 12 has two second limiting protrusions 121 therein, and the two second limiting protrusions 121 are symmetrically disposed on opposite sidewalls of the second mounting groove 12. Exemplarily, in the embodiment of the present invention, the position-limiting fastening performance of the positive electrode insulating plate 4 and the negative electrode insulating plate 5 can be further improved by symmetrically disposing two first position-limiting protrusions 111 with respect to the rivet through-holes in the first mounting groove 11 and stacking two second position-limiting protrusions 121 with respect to the rivet through-holes in the second mounting groove 12. When the trend of relative rotation is generated, the stress generated can be shared by the two first limiting protrusions 111 or the second limiting protrusions 121, the deformation and the damage of the matching surfaces of the positive insulating plate 4 and the negative insulating plate 5 during long-term use are avoided, and the torsion resistance and the whole service life of the battery top cover assembly are further improved.
Optionally, the profile of the first stopper protrusion 111 is different from the profile of the second stopper protrusion 121. Illustratively, in the embodiment of the present invention, the first limiting protrusion 111 is a rectangular block-shaped structure protruding from the side wall of the first mounting groove 11, and the second limiting protrusion 121 is also a rectangular block-shaped structure protruding from the side wall of the first mounting groove 11, but the first limiting protrusion 111 is a circular arc chamfer at the junction of the two side walls on the contour, and the second limiting protrusion 121 is provided with a bevel notch at the junction of one side wall on the contour. Accordingly, the shapes of the first groove 41 on the positive electrode insulating plate 4 and the third groove 51 on the negative electrode insulating plate 5 are also different. When carrying out the assembly of battery top cap subassembly, if during the staff mistake pack into first mounting groove 11 with assembled negative pole insulation board 5 and negative pole riveting piece 3, can mismatch and can't pack into because of the shape of third recess 51 and first spacing protruding 111, realize anodal insulation board 4 and negative pole insulation board 5 prevent slow-witted function, guarantee that the assembly is accurate, improved battery top cap subassembly's practicality.
Optionally, the first torsion-proof protrusion 421 and the first groove 41 are integrally formed by punching; the second torsion-proof protrusion 521 and the second groove 21 are integrally formed by punching. Illustratively, in the embodiment of the present invention, the first anti-twist protrusion 421 and the first groove 41, and the second anti-twist protrusion 521 and the second groove 21 may be disposed at corresponding positions on two sides of the substrate plate body, and are integrally formed by stamping, which has a simple structure and is convenient to process.
Optionally, the top cover sheet 1 further has an explosion-proof valve mounting hole 13, and the explosion-proof valve mounting hole 13 is located between the first mounting groove 11 and the second mounting groove 12. Illustratively, in the embodiment of the present invention, the explosion-proof valve a and the explosion-proof valve protection sheet b may be mounted at the explosion-proof valve mounting hole 13 at the time of actual power battery assembly. Compare in traditional power battery with the mode that the explosion-proof valve structure set up on the curb plate of shell body, through set up the explosion-proof valve mounting hole 13 that is used for the cooperation to install the explosion-proof valve structure on top cap sheet body 1, can effectively increase the area of the explosion-proof valve a that sets up, improved battery top cap subassembly's safety in utilization.
Optionally, the positive pole 6 comprises a first pole body 61 and a second pole body 62 which are connected in sequence, the first pole body 61 is used for penetrating and arranging in the top cover sheet body 1 and the positive insulating plate 4, the second pole body 62 is used for penetrating and arranging in the positive riveting block 2, the diameter of the first pole body 61 is larger than that of the second pole body 62, the second pole body 62 is coaxial with the first pole body 61, a first annular boss 611 is arranged on the end face, connected with the second pole body 62, of the first pole body 61, the first annular boss 611 is arranged around the second pole body 62, and a first annular groove 621 is formed in the second pole body 62; the negative pole 7 comprises a third column body 71 and a fourth column body 72 which are connected in sequence, the third column body 71 is arranged in the top cover sheet body 1 and the positive insulating plate 4 in a penetrating manner, the fourth column body 72 is arranged in the positive riveting block 2 in a penetrating manner, the diameter of the third column body 71 is larger than that of the fourth column body 72, the third column body 71 and the fourth column body 72 are coaxial, a second annular boss 711 is arranged on the end face, connected with the fourth column body 72, of the third column body 71, the second annular boss 711 is arranged around the fourth column body 72, and a second annular groove 721 is arranged on the fourth column body 72. Illustratively, in the embodiment of the invention, when the positive post 6 is riveted to the positive riveting block 2, the end surface of the first column 61 connected to the second column 62 is flush with the bottom wall of the first groove 41, and the corresponding first annular boss 611 protrudes from the bottom wall of the first groove 41 and the end surface of the first column 61. After the positive electrode rivet block 2 made of copper or aluminum is in contact with the bottom wall of the first groove 41, the positive electrode rivet block deforms under the extrusion of the first annular boss 611 due to its soft hardness and fills the inside of the first annular groove 621. After the riveting is completed, the space in the first annular groove 621 can be filled up by the deformed positive riveting block 2, the fastening cooperation is realized, the first annular groove 621 and the matching part of the positive riveting block 2 can limit the positive riveting block 2 in the axis direction of the positive post 6, the relative sliding of the positive riveting block 2 in the subsequent welding process is prevented, and the flatness and the welding goodness of the surface of the positive riveting block 2 after the riveting are improved. And metal scraps generated during welding can be prevented from entering the interior, and the product safety is improved. The structure of the second negative post 7 is the same as that of the positive post 6, and is not described in detail herein.
Optionally, the side walls of the first cylinder 61 and the third cylinder 71 are sleeved with insulating seal rings 8. Exemplarily, in the embodiment of the present invention, the insulating sealing rings 8 are sleeved on the first cylinder 61 and the third cylinder 71, so that the assembly gaps that may exist between the positive post 6 and the negative post 7 and the top cap sheet 1 and between the positive insulating plate 4 or the negative insulating plate 5 can be further filled, the insulating isolation between the positive post 6 and the negative post 7 and the top cap sheet 1 is realized, the short circuit is avoided when the positive post 6 and the negative post 7 are conducted, and the safety of the battery top cap assembly is further improved.
Optionally, the length of the insulating seal ring 8 in the axial direction of the first cylinder 61 is greater than the length of the first cylinder 61; the length of the insulating seal ring 8 in the axial direction of the third cylinder 71 is greater than the length of the third cylinder 71. Illustratively, in the embodiment of the present invention, the length of the insulating seal ring 8 is set to be longer relative to the first cylinder 61 and the third cylinder 71. Taking positive post 6 as an example, when carrying out the riveting fixed of positive post 6 and positive riveting piece 2, positive riveting piece 2 can compress tightly insulating seal 8 when the diapire contact with first recess 41, makes insulating seal 8 can fill completely the fit-up gap between first cylinder 61 and top cap lamellar body 1 and the anodal insulation board 4, has further improved battery top cap subassembly's inside insulating properties.
Fig. 15 is a flowchart of a power battery according to an embodiment of the present invention. As shown in fig. 15, the embodiment of the present invention further provides a power battery, which includes a battery top cover assembly and a lower case 9 as shown in fig. 1 to 14, wherein the top cover sheet 1 of the battery top cover assembly is covered on the lower case 9. Adopt this power battery of battery top cap subassembly, its battery top cap subassembly is except utilizing the cell wall of first spacing groove 42 and second spacing groove 52 to carry out spacing fixed basis as flange positive pole riveting piece 2 and negative pole riveting piece 3, first anti-twist bulge 421 and second are prevented turning round protruding 521 can realize respectively positive pole riveting piece 2 and negative pole riveting piece 3 spacing fixed, guarantee with positive pole riveting piece 2 fixed connection's anodal post 6 and with the installation fastening of negative pole riveting piece 3 fixed connection's negative pole post 7, avoid taking place relative rotation with top cap lamellar body 1 under the exogenic action, the anti-twist ability of positive pole riveting piece 2 and negative pole riveting piece 3 has further been improved. Meanwhile, compared with the related art, the battery top cover assembly provided by the embodiment of the invention can solve the problems of high manufacturing cost and poor torsion resistance of the riveting block structure on the battery top cover in the related art only by improving the forming structures of the anode insulating plate 4 and the cathode insulating plate 5 and arranging the structures matched with the top cover sheet body, the anode riveting block 2 and the cathode riveting block 3. The positive riveting block 2 and the negative riveting block 3 have the same structure, can be manufactured by adopting the same die and process, and reduces the manufacturing cost.
Optionally, a plastic structural member 14 matching with the opening of the lower shell 9 is protruded on the second side surface 1 b. For example, in the embodiment of the present invention, after the top cover sheet 1 is covered on the lower housing 9, the plastic structural member 14 on the second side surface 1b is correspondingly inserted into the opening of the lower housing 9, so as to limit the top cover sheet 1 in the horizontal direction and avoid relative sliding, thereby facilitating welding between the top cover sheet 1 and the lower housing, and improving the sealing performance of the power battery.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item appearing in front of the word "comprising" or "comprises" includes the element or item listed after the word "comprising" or "comprises" and the equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A battery top cap assembly, comprising:
a top cover sheet body (1), a positive pole riveting block (2), a negative pole riveting block (3), a positive pole insulating plate (4), a negative pole insulating plate (5), a positive pole (6) and a negative pole (7),
the top cover sheet body (1) is provided with a first side surface (1 a) and a second side surface (1 b) which are oppositely arranged, a first mounting groove (11) and a second mounting groove (12) are arranged on the first side surface (1 a) at intervals, a first limiting bulge (111) is convexly arranged on the side wall of the first mounting groove (11), a second limiting bulge (121) is convexly arranged on the side wall of the second mounting groove (12),
the positive insulation plate (4) is arranged in the first installation groove (11), a first groove (41) matched with the first limiting protrusion (111) is formed in one side face of the positive insulation plate (4), a first limiting groove (42) is formed in the other side face of the positive insulation plate (4), a first anti-torsion protrusion (421) is convexly arranged on the side wall of the first limiting groove (42), the positive riveting block (2) is arranged in the first limiting groove (42), the positive riveting block (2) is provided with a second groove (21) matched with the first anti-torsion protrusion (421), and the positive post (6) sequentially penetrates through the bottom wall of the first installation groove (11), the positive insulation plate (4) and is riveted with the positive riveting block (2);
the negative pole insulation board (5) install in second mounting groove (12), a side of negative pole insulation board (5) have with spacing protruding (121) matched with third recess (51) of second, the another side of negative pole insulation board (5) has second spacing groove (52), the protrusion is provided with the second on the lateral wall of second spacing groove (52) and prevents turning round protruding (521), negative pole riveting block (3) install in second spacing groove (52), negative pole riveting block (3) have with the second prevents turning round protruding (521) assorted fourth recess (31), negative pole post (7) run through in proper order the diapire of second mounting groove (12), negative pole insulation board (5) and with negative pole riveting block (3) riveting.
2. The battery top cap assembly according to claim 1, wherein the first mounting groove (11) has two first limiting protrusions (111) therein, and the two first limiting protrusions (111) are symmetrically arranged on opposite sidewalls of the first mounting groove (11); the second mounting groove (12) is internally provided with two second limiting protrusions (121), and the two second limiting protrusions (121) are symmetrically arranged on opposite side walls of the second mounting groove (12).
3. The battery top cap assembly of claim 2, wherein the first stopper protrusion (111) has a different profile than the second stopper protrusion (121).
4. The battery top cap assembly of claim 1, wherein the first anti-twist protrusion (421) and the first groove (41) are integrally stamped and formed; the second torsion-proof protrusion (521) and the second groove (21) are integrally formed in a punching mode.
5. The battery top cap assembly according to claim 1, wherein the top cap sheet (1) further has an explosion-proof valve mounting hole (13) thereon, the explosion-proof valve mounting hole (13) being located between the first mounting groove (11) and the second mounting groove (12).
6. The battery top cap assembly according to claim 1, wherein the positive post (6) comprises a first post body (61) and a second post body (62) which are connected in sequence, the first post body (61) is used for penetrating and being arranged in the top cap sheet body (1) and the positive insulating plate (4), the first post body (61) is used for penetrating and being arranged in the positive riveting block (2), the diameter of the first post body (61) is larger than that of the second post body (62), the second post body (62) is coaxial with the first post body (61), the end face of the first post body (61) connected with the second post body (62) is provided with a first annular boss (611), the first annular boss (611) is arranged around the second post body (62), and the second post body (62) is provided with a first annular groove (621); the negative pole post (7) comprises a third post body (71) and a fourth post body (72) which are sequentially connected, the third post body (71) is used for penetrating in the top cover sheet body (1) and the positive insulating plate (4), the fourth post body (72) is used for penetrating in the positive riveting block (2), the diameter of the third post body (71) is larger than that of the fourth post body (72), the third post body (71) is coaxial with the fourth post body (72), a second annular boss (711) is arranged on the end face, connected with the fourth post body (72), of the third post body (71), the second annular boss (711) surrounds the fourth post body (72), and a second annular groove (721) is formed in the fourth post body (72).
7. The battery top cover assembly according to claim 6, wherein the side walls of the first cylinder (61) and the third cylinder (71) are sleeved with insulating sealing rings (8).
8. The battery top cap assembly according to claim 7, wherein the length of the insulating seal ring (8) in the axial direction of the first cylinder (61) is greater than the length of the first cylinder (61); the length of the insulating seal ring (8) in the axial direction of the third column (71) is greater than the length of the third column (71).
9. A power battery, characterized in that the power battery adopts the battery top cover assembly and the lower shell (9) according to any one of claims 1 to 8, and the top cover sheet body (1) of the battery top cover assembly is covered on the lower shell (9).
10. The power battery according to claim 9, characterized in that the second side (1 b) is provided with a protruding plastic structure (14) matching the opening of the lower housing (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211257920.2A CN115458845B (en) | 2022-10-13 | 2022-10-13 | Battery top cover assembly and power battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211257920.2A CN115458845B (en) | 2022-10-13 | 2022-10-13 | Battery top cover assembly and power battery |
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| CN115458845A true CN115458845A (en) | 2022-12-09 |
| CN115458845B CN115458845B (en) | 2023-07-21 |
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| CN202211257920.2A Active CN115458845B (en) | 2022-10-13 | 2022-10-13 | Battery top cover assembly and power battery |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209447863U (en) * | 2019-01-22 | 2019-09-27 | 庐江力翔电池科技有限责任公司 | A kind of connection structure of the high-capacity lithium battery top cover with fool-proof mechanism |
| CN209658240U (en) * | 2019-02-26 | 2019-11-19 | 合肥国轩高科动力能源有限公司 | A kind of lightweight battery covering plate structure |
| CN209981356U (en) * | 2019-03-20 | 2020-01-21 | 欣旺达电动汽车电池有限公司 | Pole and battery top cover with anti-twisting function |
| CN210805910U (en) * | 2019-11-21 | 2020-06-19 | 东莞美安时能源科技有限公司 | Dual-head chargeable and dischargeable lithium battery with fool-proof function |
| CN212967854U (en) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | Top cover structure of lithium battery |
| CN212967855U (en) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | Secondary cell's continuous type utmost point post assembly structure |
| CN215869575U (en) * | 2021-05-31 | 2022-02-18 | 中创新航科技股份有限公司 | Battery cover plate assembly and battery |
| CN217114582U (en) * | 2022-03-21 | 2022-08-02 | 山东圣泉新能源科技有限公司 | Positive plate cover assembly, negative plate cover assembly and circular power battery |
| CN217507601U (en) * | 2022-05-18 | 2022-09-27 | 深圳市科达利实业股份有限公司 | Utmost point post structure, battery top cap and power battery |
-
2022
- 2022-10-13 CN CN202211257920.2A patent/CN115458845B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209447863U (en) * | 2019-01-22 | 2019-09-27 | 庐江力翔电池科技有限责任公司 | A kind of connection structure of the high-capacity lithium battery top cover with fool-proof mechanism |
| CN209658240U (en) * | 2019-02-26 | 2019-11-19 | 合肥国轩高科动力能源有限公司 | A kind of lightweight battery covering plate structure |
| CN209981356U (en) * | 2019-03-20 | 2020-01-21 | 欣旺达电动汽车电池有限公司 | Pole and battery top cover with anti-twisting function |
| CN210805910U (en) * | 2019-11-21 | 2020-06-19 | 东莞美安时能源科技有限公司 | Dual-head chargeable and dischargeable lithium battery with fool-proof function |
| CN212967854U (en) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | Top cover structure of lithium battery |
| CN212967855U (en) * | 2020-10-13 | 2021-04-13 | 厦门海辰新能源科技有限公司 | Secondary cell's continuous type utmost point post assembly structure |
| CN215869575U (en) * | 2021-05-31 | 2022-02-18 | 中创新航科技股份有限公司 | Battery cover plate assembly and battery |
| CN217114582U (en) * | 2022-03-21 | 2022-08-02 | 山东圣泉新能源科技有限公司 | Positive plate cover assembly, negative plate cover assembly and circular power battery |
| CN217507601U (en) * | 2022-05-18 | 2022-09-27 | 深圳市科达利实业股份有限公司 | Utmost point post structure, battery top cap and power battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115458845B (en) | 2023-07-21 |
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Effective date of registration: 20240718 Address after: No. 8 Keyuan Road, Linkong Economic Zone, Xiaogan City, Hubei Province, 432099 Patentee after: Xiaogan Chuneng New Energy Innovation Technology Co.,Ltd. Country or region after: China Address before: 430000 No. 1, Longyang Third Road, Hanyang District, Wuhan City, Hubei Province Patentee before: CORNEX NEW ENERGY Co.,Ltd. Country or region before: China |