CN115458845B - Battery top cover assembly and power battery - Google Patents
Battery top cover assembly and power battery Download PDFInfo
- Publication number
- CN115458845B CN115458845B CN202211257920.2A CN202211257920A CN115458845B CN 115458845 B CN115458845 B CN 115458845B CN 202211257920 A CN202211257920 A CN 202211257920A CN 115458845 B CN115458845 B CN 115458845B
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- groove
- positive electrode
- cylinder
- top cover
- insulating plate
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- 238000009434 installation Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 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
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 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
- 230000002265 prevention Effects 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
- 210000002421 cell wall Anatomy 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
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—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
-
- 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, an anode riveting block, a cathode riveting block, an anode insulating plate, a cathode insulating plate, an anode column and a cathode 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 post penetrates through the first mounting groove and the positive pole insulating plate in sequence and is riveted with the positive pole riveting block, and the negative pole post penetrates through the second mounting groove and the negative pole insulating plate in sequence and is riveted with the negative pole riveting block. The battery top cover assembly can solve the problems that a riveting block structure positioned on a battery top cover in the related art 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
Problems such as environmental pollution and energy shortage are increasingly prominent 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 automobiles and the like because of the advantages of green 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 related art, the pole of power battery sets up on the top cap structure generally, and the pole is realized realizing with top cap fixed connection through setting up plastic part in the inside and outside both sides of top cap to weld the riveting piece in the top cap outside, and in order better fixed pole, prevent that the pole from receiving external force effect and giving rise to the rotation, can set up cooperation structures such as special-shaped pottery anti-torsion fixed column on positive and negative pole riveting piece respectively and cooperate the installation with the trompil that corresponds on the apron generally, realize the anti-torsion function to the riveting piece.
The riveting blocks with different shapes are manufactured in the related technology to meet the torsion prevention function of the anode riveting block and the cathode riveting block, and the special-shaped structure of the riveting block is often required to be provided with a set of dies to respectively manufacture the anode riveting block and the cathode riveting block, so that the process is increased, and the manufacturing cost is high. Meanwhile, the anti-torsion fixing column is in hard contact with the top cover through the flanges around the plastic parts matched with the anti-torsion fixing column, the structure is complex, the assembly gap is large, and the ceramic anti-torsion fixing column is easy to damage after long-time use, so that the anti-torsion 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 of high manufacturing cost and poor anti-torsion capability of a riveting block structure positioned on a battery top cover in the related art. The technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a battery top cap assembly, including:
a top cover sheet body, a positive electrode riveting block, a negative electrode riveting block, a positive electrode insulating plate, a negative electrode insulating plate, a positive electrode column and a negative electrode 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 limit protrusion is arranged on the side wall of the first mounting groove in a protruding mode, a second limit protrusion is arranged on the side wall of the second mounting groove in a protruding mode,
the positive electrode insulating plate is arranged in the first mounting groove, one side surface of the positive electrode insulating plate is provided with a first groove matched with the first limiting protrusion, the other side surface of the positive electrode 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 electrode riveting block is arranged in the first limiting groove, the positive electrode riveting block is provided with a second groove matched with the first anti-torsion protrusion, and the positive electrode column sequentially penetrates through the bottom wall of the first mounting groove, the positive electrode insulating plate and is riveted with the positive electrode riveting block;
the negative electrode insulating plate is installed in the second mounting groove, one side face of the negative electrode insulating plate is provided with a third groove matched with the second limiting protrusion, the other side face of the negative electrode insulating plate is provided with a second limiting groove, a second anti-torsion protrusion is arranged on the side wall of the second limiting groove in a protruding mode, the negative electrode riveting block is installed in the second limiting groove, the negative electrode riveting block is provided with a fourth groove matched with the second anti-torsion protrusion, and the negative electrode column sequentially penetrates through the bottom wall of the second mounting groove, the negative electrode insulating plate and the negative electrode riveting block are riveted.
Optionally, the first mounting groove is internally provided with two first limiting protrusions, 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 protrusions, and the two second limiting protrusions are symmetrically arranged on opposite side walls of the second mounting groove.
Optionally, the profile of the first limit projection is different from the profile of the second limit projection.
Optionally, the first torsion preventing protrusion and the first groove are integrally formed by stamping; the second anti-torsion bulge and the second groove are integrally formed through stamping.
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 pole includes a first cylinder and a second cylinder that are connected in sequence, the first cylinder is used for penetrating through the top cover sheet body and the positive pole insulating plate, the first cylinder is used for penetrating through the positive pole riveting block, the diameter of the first cylinder is larger than that of the second cylinder, the second cylinder is coaxial with the first cylinder, a first annular boss is arranged on an end face, connected with the second cylinder, of the first cylinder, the first annular boss is arranged around the second cylinder, and a first annular groove is arranged on the second cylinder; 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 pole insulation board, the fourth cylinder is used for wearing to locate in the positive pole 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 have the second annular boss on the terminal surface that the fourth cylinder is connected, the second annular boss centers on the fourth cylinder is arranged, have the second annular groove on the fourth cylinder.
Optionally, the side walls of the first cylinder and the third cylinder are sleeved with insulating sealing 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 cylinder is greater than the length of the third cylinder.
In a second aspect, an embodiment of the present invention further provides a power battery, including the battery module of the first aspect and a lower housing, where the top cover sheet body of the battery top cover module is covered on the lower housing.
Optionally, a plastic structural member matched with the opening of the lower shell is arranged on the second side surface in a protruding mode.
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 utilize the cell wall in first spacing groove and second spacing groove as the flange to carry out spacing fixed basis to anodal riveting piece and negative pole riveting piece, first anti-torsion protruding and second anti-torsion protruding can realize respectively that spacing fixed to anodal riveting piece and negative pole riveting piece, guarantee with anodal riveting piece fixed connection's positive pole post and with negative pole riveting piece fixed connection's negative pole post's installation fastening, avoid taking place relative rotation with the top cap lamellar body under the exogenic action, further improved anodal riveting piece and negative pole riveting piece's anti-torsion ability.
Compared with the related art, the battery top cover assembly provided by the embodiment of the invention has the advantages that the forming structures of the positive electrode insulating plate and the negative electrode insulating plate are improved, and the structures matched with the positive electrode riveting block and the negative electrode riveting block are arranged on the top cover sheet body, the positive electrode riveting block and the negative electrode riveting block, so that the problems of high manufacturing cost and poor anti-torsion capability of the riveting block structure positioned on the battery top cover in the related art can be solved. The positive pole riveting piece and the negative pole riveting piece have the same structure, can be manufactured by adopting the same mould and process, and reduce the manufacturing cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a perspective exploded view of a battery top cap assembly according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an assembly structure of a top cover sheet body, a positive electrode post and a negative electrode post according to an embodiment of the present 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 partially enlarged structure as at B in FIG. 2;
fig. 5 is a schematic side view of a battery top cap assembly according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of a positive electrode insulating sheet according to an embodiment of the present invention;
fig. 7 is a schematic view of the bottom structure of a positive electrode insulating sheet according to an embodiment of the present invention;
fig. 8 is a schematic perspective view of a negative electrode insulating sheet according to an embodiment of the present invention;
fig. 9 is a schematic view of the bottom surface structure of a negative electrode insulating sheet according to an embodiment of the present invention;
fig. 10 is a schematic structural view of an anode insulating sheet according to an embodiment of the present invention;
fig. 11 is a schematic structural view of a negative electrode insulating sheet according to an embodiment of the present invention;
FIG. 12 is a cross-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 post provided by 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; 1 a-a first side; 1 b-a second side; 2-positive electrode riveting blocks; 3-a cathode riveting block; 4-an anode insulating plate; 5-a negative electrode insulating plate; 6-positive electrode posts; 7-a negative electrode column; 8-insulating sealing rings; 9-a lower housing; 11-a first mounting groove; 12-a second mounting groove; 13-explosion-proof valve mounting holes; 14-plastic structural members; 21-a second groove; 31-fourth grooves; 41-a first groove; 42-a first limit groove; 51-a third groove; 52-a second limit groove; 61-a first column; 62-a second column; 71-a third column; 72-a fourth column; 111-a first limit protrusion; 121-a second limit protrusion; 421-first anti-torsion protrusions; 521-second anti-twisting protrusions; 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-an explosion-proof valve protection sheet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
In the related art, the pole of power battery sets up on the top cap structure generally, and the pole is realized realizing with top cap fixed connection through setting up plastic part in the inside and outside both sides of top cap to weld the riveting piece in the top cap outside, and in order better fixed pole, prevent that the pole from receiving external force effect and giving rise to the rotation, can set up cooperation structures such as special-shaped pottery anti-torsion fixed column on positive and negative pole riveting piece respectively and cooperate the installation with the trompil that corresponds on the apron generally, realize the anti-torsion function to the riveting piece.
The riveting blocks with different shapes are manufactured in the related technology to meet the torsion prevention function of the anode riveting block and the cathode riveting block, and the special-shaped structure of the riveting block is often required to be provided with a set of dies to respectively manufacture the anode riveting block and the cathode riveting block, so that the process is increased, and the manufacturing cost is high. Meanwhile, the anti-torsion fixing column is in hard contact with the top cover through the flanges around the plastic parts matched with the anti-torsion fixing column, the structure is complex, the assembly gap is large, and the ceramic anti-torsion fixing column is easy to damage after long-time use, so that the anti-torsion capability is poor.
Fig. 1 is a perspective exploded view of a battery top cap assembly according to an embodiment of the present invention. Fig. 2 is a schematic diagram of an assembly structure of a top cover sheet body, a positive electrode post and a negative electrode post according to an embodiment of the present invention. Fig. 3 is a partially enlarged schematic structural view as at a in fig. 2. Fig. 4 is a partially enlarged schematic structural view as at B in fig. 2. Fig. 5 is a schematic side view of a battery top cap assembly according to an embodiment of the present invention. Fig. 6 is a schematic perspective view of a positive electrode insulating sheet according to an embodiment of the present invention. Fig. 7 is a schematic view of the bottom structure of a positive electrode insulating sheet according to an embodiment of the present invention. Fig. 8 is a schematic perspective view of a negative electrode insulating sheet according to an embodiment of the present invention. Fig. 9 is a schematic view of the bottom structure of a negative electrode insulating sheet according to an embodiment of the present invention. Fig. 10 is a schematic structural diagram of an anode insulating sheet according to an embodiment of the present invention.
Fig. 11 is a schematic structural view of a negative electrode insulating sheet according to an embodiment of the present invention. Fig. 12 is a structural cross-sectional view of a positive electrode post provided by 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 post provided by an embodiment of the present invention. As shown in fig. 1 to 14, the present applicant provides, by practice, a battery top cap assembly including a top cap sheet body 1, a positive electrode rivet block 2, a negative electrode rivet block 3, a positive electrode insulating plate 4, a negative electrode insulating plate 5, a positive electrode post 6, and a negative electrode post 7.
The top cover sheet 1 has a first side 1a and a second side 1b disposed opposite to each other, and a first mounting groove 11 and a second mounting groove 12 are disposed on the first side 1a at intervals. The side wall of the first mounting groove 11 is convexly provided with a first limit protrusion 111, and the side wall of the second mounting groove 12 is convexly provided with a second limit protrusion 121.
The positive insulating plate 4 is mounted in the first mounting groove 11, and one side surface of the positive insulating plate 4 has a first groove 41 that mates with the first limit protrusion 111. The other side surface of the positive insulating plate 4 is provided with a first limiting groove 42, and a first anti-twisting protrusion 421 is arranged on the side wall of the first limiting groove 42 in a protruding mode. The positive electrode riveting block 2 is mounted in the first limiting groove 42, and the positive electrode riveting block 2 is provided with a second groove 21 matched with the first anti-twisting protrusion 421. The positive electrode post 6 penetrates through the bottom wall of the first mounting groove 11, the positive electrode insulating plate 4 and is riveted with the positive electrode riveting block 2 in sequence.
The negative insulating plate 5 is mounted in the second mounting groove 12, and one side surface of the negative insulating plate 5 has a third groove 51 that mates with the second limiting protrusion 121. The other side surface of the negative electrode insulating plate 5 is provided with a second limiting groove 52, and a second anti-torsion protrusion 521 is convexly arranged on the side wall of the second limiting groove 52. The negative electrode riveting block 3 is installed in the second limiting groove 52, and the negative electrode riveting block 3 is provided with a fourth groove 31 matched with the second anti-torsion protrusion 521. The negative electrode post 7 penetrates the bottom wall of the second mounting groove 12, the negative electrode insulating plate 5 and is riveted with the negative electrode riveting block 3 in sequence.
In the embodiment of the present invention, the first side 1a of the cap sheet 1 may serve as an end surface of the battery that is located outside after assembly. When the battery top cover assembly is assembled, the positive insulating plate 4 and the negative insulating plate 5 are respectively assembled into the first mounting groove 11 and the second mounting groove 12, wherein the first groove 41 on one side surface of the positive insulating plate 4 is matched and clamped on the first limiting protrusion 111 in the first mounting groove 11, and the second groove 21 on one side surface of the negative insulating plate 5 is matched and clamped on the second limiting protrusion 121 in the second mounting groove 12. The first limiting protrusion 111 and the second limiting protrusion 121 can respectively realize limiting fixation of the positive insulating plate 4 and the negative insulating plate 5, and ensure stable assembly. And then the positive electrode riveting block 2 and the negative electrode riveting block 3 are respectively matched and assembled into the first limiting groove 42 and the second limiting groove 52, the first anti-torsion bulge 421 in the first limiting groove 42 is clamped into the second groove 21 on the positive electrode riveting block 2, and the second anti-torsion bulge 521 in the second limiting groove 52 is clamped into the fourth groove 31 of the negative electrode riveting block 3. The bottom wall of the first installation groove 11, the positive electrode insulating plate 4 and the positive electrode riveting block 2 are provided with riveting through holes matched with the positive electrode column 6, and the positive electrode column 6 can sequentially penetrate through the bottom wall of the first installation groove 11, the positive electrode insulating plate 4 and be riveted with the positive electrode riveting block 2 from the side of the second side surface 1 b. The bottom wall of the second mounting groove 12, the negative electrode insulating plate 5 and the negative electrode riveting block 3 are provided with riveting through holes matched with the negative electrode column 7, and the negative electrode column 7 can sequentially penetrate through the bottom wall of the second mounting groove 12, the negative electrode insulating plate 5 and be riveted with the negative electrode riveting block 3 from the side of the second side surface 1 b.
In the use process after the assembly is completed, except that the groove walls of the first limiting groove 42 and the second limiting groove 52 are used as the flanges to limit and fix the positive electrode riveting block 2 and the negative electrode riveting block 3, the first anti-torsion protrusions 421 and the second anti-torsion protrusions 521 can respectively realize the limit and fix of the positive electrode riveting block 2 and the negative electrode riveting block 3, ensure the installation and fastening of the positive electrode column 6 fixedly connected with the positive electrode riveting block 2 and the negative electrode column 7 fixedly connected with the negative electrode riveting block 3, avoid the relative rotation with the top cover sheet body 1 under the action of external force, and further improve the anti-torsion capability of the positive electrode riveting block 2 and the negative electrode riveting block 3. 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 positive electrode insulating plate 4 and the negative electrode insulating plate 5, and the structure matched with the positive electrode riveting block 2 and the negative electrode riveting block 3 is arranged on the top cover sheet body, so that the problems of high manufacturing cost and poor torsion resistance of the riveting block structure positioned on the battery top cover in the related art can be solved. The positive electrode riveting block 2 and the negative electrode 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 rivet block 2 and the negative electrode rivet block 3 are each soft metal structural members made of copper or aluminum.
Optionally, the first mounting groove 11 is provided with two first limiting protrusions 111, and the two first limiting protrusions 111 are symmetrically arranged on opposite side walls 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. Illustratively, in the embodiment of the present invention, by disposing two first limit protrusions 111 symmetrically with respect to the rivet through hole in the first mounting groove 11 and disposing two second limit protrusions 121 stacked with respect to the rivet through hole in the second mounting groove 12, the limit tightening performance with respect to the positive electrode insulating plate 4 and the negative electrode insulating plate 5 can be further improved. When the trend of relative rotation is generated, the generated stress can be shared through the two first limit protrusions 111 or the two second limit protrusions 121, deformation and damage to the matching surfaces of the positive insulating plate 4 and the negative insulating plate 5 during long-time use are avoided, and the torsion resistance and the overall service life of the battery top cover assembly are further improved.
Alternatively, the profile of the first limit projection 111 is different from the profile of the second limit projection 121. Illustratively, in the embodiment of the present invention, the first limiting protrusion 111 is a rectangular block structure protruding from a side wall of the first mounting groove 11, and the second limiting protrusion 121 is also a rectangular block structure protruding from a side wall of the second mounting groove 12, but the connection points of two side walls of the first limiting protrusion 111 on the profile are both arc-shaped chamfer angles, and the connection point of one side wall of the second limiting protrusion 121 on the profile is provided with a bevel notch. Accordingly, 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 in shape. When the battery top cover assembly is assembled, if workers wrongly load the assembled negative electrode insulating plate 5 and the negative electrode riveting block 3 into the first mounting groove 11, the assembled negative electrode insulating plate 5 and the assembled negative electrode riveting block cannot be assembled due to mismatching of the shapes of the third groove 51 and the first limiting protrusion 111, so that the foolproof function of the positive electrode insulating plate 4 and the negative electrode insulating plate 5 is realized, the assembly accuracy is ensured, and the practicability of the battery top cover assembly is improved.
Alternatively, first anti-torsion protrusion 421 and first groove 41 are integrally press-molded; the second anti-torsion protrusion 521 and the second groove 21 are integrally press-molded. Illustratively, in the embodiment of the present invention, the first anti-twisting protrusions 421 and the first grooves 41, and the second anti-twisting protrusions 521 and the second grooves 21 may be disposed at corresponding positions on both sides of the substrate plate body, and are integrally formed by stamping, so that the structure is simple and the processing is convenient.
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 installed at the explosion-proof valve installation hole 13 at the time of actual power battery assembly. Compared with the traditional mode that the explosion-proof valve structure is arranged on the side plate of the outer shell body of the power battery, the explosion-proof valve mounting hole 13 for being matched with the explosion-proof valve structure is formed in the top cover sheet body 1, so that the area of the arranged explosion-proof valve a can be effectively increased, and the use safety of the battery top cover assembly is improved.
Optionally, the positive pole 6 includes a first column 61 and a second column 62 connected in sequence, the first column 61 is used for penetrating into the top cover sheet 1 and the positive pole insulating board 4, the second column 62 is used for penetrating into the positive pole riveting block 2, the diameter of the first column 61 is larger than that of the second column 62, the second column 62 is coaxial with the first column 61, a first annular boss 611 is arranged on an end face where the first column 61 is connected with the second column 62, the first annular boss 611 is arranged around the second column 62, and a first annular groove 621 is arranged on the second column 62; the cathode post 7 comprises a third post 71 and a fourth post 72 which are sequentially connected, the third post 71 is used for penetrating the top cover sheet body 1 and the cathode insulating plate 4, the fourth post 72 is used for penetrating the cathode riveting block 2, the diameter of the third post 71 is larger than that of the fourth post 72, the third post 71 is coaxial with the fourth post 72, a second annular boss 711 is arranged on the end face, connected with the fourth post 72, of the third post 71, the second annular boss 711 is arranged around the fourth post 72, and a second annular groove 721 is formed in the fourth post 72. Illustratively, in the embodiment of the present invention, when the positive electrode post 6 and the positive electrode riveting block 2 are riveted, the end surface of the first post 61 connected to the second post 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 post 61. After the positive electrode rivet block 2 made of copper or aluminum contacts the bottom wall of the first groove 41, it is deformed by the extrusion of the first annular boss 611 and fills the inside of the first annular groove 621 due to its softer hardness. After the riveting is finished, the deformed positive electrode riveting block 2 can fill up the space in the first annular groove 621 to realize fastening fit, at this time, the fit part of the first annular groove 621 and the positive electrode riveting block 2 can limit the positive electrode riveting block 2 in the axial direction of the positive electrode post 6, relative sliding of the positive electrode riveting block 2 in the subsequent welding process is prevented, and the flatness and welding rate of the surface of the positive electrode riveting block 2 after riveting are improved. And the metal scraps generated during welding can be prevented from entering the inside, so that the safety of the product is improved. The structure of the second negative electrode post 7 is the same as that of the positive electrode post 6, and will not be described here.
Optionally, the side walls of the first column 61 and the third column 71 are respectively sleeved with an insulating sealing ring 8. Illustratively, in the embodiment of the present invention, by sleeving the insulating sealing rings 8 on the first column 61 and the third column 71, assembly gaps possibly existing between the positive electrode column 6 and the negative electrode column 7 and the top cover sheet body 1 and between the positive electrode insulating plate 4 or the negative electrode insulating plate 5 can be further filled, insulation isolation between the positive electrode column 6 and the negative electrode column 7 and the top cover sheet body 1 is realized, short circuits are avoided when the positive electrode column 6 and the negative electrode column 7 are conducted, and safety of the battery top cover assembly is further improved.
Alternatively, the length of the insulating seal 8 in the axial direction of the first cylinder 61 is longer than the length of the first cylinder 61; the length of the insulating seal 8 in the axial direction of the third cylinder 71 is longer than the length of the third cylinder 71. Illustratively, in the embodiment of the present invention, by setting the length of the insulating seal 8 longer with respect to the first cylinder 61 and the third cylinder 71. Taking the positive pole 6 as an example, when the positive pole 6 and the positive pole riveting block 2 are riveted, the positive pole riveting block 2 can press the insulating sealing ring 8 while contacting with the bottom wall of the first groove 41, so that the insulating sealing ring 8 can completely fill the assembly gap between the first column 61 and the top cover sheet body 1 and the positive pole insulating plate 4, and the internal insulating performance of the battery top cover assembly is further improved.
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 including the battery top cover assembly and the lower case 9 shown in fig. 1 to 14, wherein the top cover sheet body 1 of the battery top cover assembly is covered on the lower case 9. By adopting the power battery of the battery top cover assembly, the battery top cover assembly can realize the limiting fixation of the positive electrode riveting block 2 and the negative electrode riveting block 3 respectively by the first anti-torsion bulge 421 and the second anti-torsion bulge 521 on the basis of limiting fixation of the positive electrode riveting block 2 and the negative electrode riveting block 3 by taking the groove walls of the first limiting groove 42 and the second limiting groove 52 as flanges, so that the installation fastening of the positive electrode column 6 fixedly connected with the positive electrode riveting block 2 and the negative electrode column 7 fixedly connected with the negative electrode riveting block 3 is ensured, the relative rotation with the top cover sheet body 1 under the action of external force is avoided, and the anti-torsion capability of the positive electrode riveting block 2 and the negative electrode riveting block 3 is further 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 positive electrode insulating plate 4 and the negative electrode insulating plate 5, and the structure matched with the positive electrode riveting block 2 and the negative electrode riveting block 3 is arranged on the top cover sheet body, so that the problems of high manufacturing cost and poor torsion resistance of the riveting block structure positioned on the battery top cover in the related art can be solved. The positive electrode riveting block 2 and the negative electrode 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.
Optionally, the second side 1b is provided with a protruding plastic structure 14 matching the opening of the lower housing 9. In the embodiment of the present invention, after the top cover sheet 1 is covered on the lower casing 9, the plastic structural member 14 located on the second side 1b is correspondingly inserted into the opening of the lower casing 9, so that the top cover sheet 1 is limited in the horizontal direction to avoid relative sliding, and welding between the top cover sheet 1 and the lower casing is facilitated, and meanwhile, the sealing performance of the power battery can be improved.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, 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, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention, but rather, the invention is to be construed as limited to the appended claims.
Claims (9)
1. A battery top cap assembly, comprising:
a top cover sheet body (1), a positive electrode riveting block (2), a negative electrode riveting block (3), a positive electrode insulating plate (4), a negative electrode insulating plate (5), a positive electrode column (6) and a negative electrode column (7),
the top cover sheet body (1) is provided with a first side face (1 a) and a second side face (1 b) which are oppositely arranged, a first installation groove (11) and a second installation groove (12) are arranged on the first side face (1 a) at intervals, a first limit protrusion (111) is arranged on the side wall of the first installation groove (11) in a protruding mode, a second limit protrusion (121) is arranged on the side wall of the second installation groove (12) in a protruding mode,
the positive electrode insulating plate (4) is arranged in the first mounting groove (11), a first groove (41) matched with the first limiting protrusion (111) is formed in one side surface of the positive electrode insulating plate (4), a first limiting groove (42) is formed in the other side surface of the positive electrode insulating plate (4), a first anti-torsion protrusion (421) is arranged on the side wall of the first limiting groove (42) in a protruding mode, the positive electrode riveting block (2) is arranged in the first limiting groove (42), the positive electrode riveting block (2) is provided with a second groove (21) matched with the first anti-torsion protrusion (421), and the positive electrode column (6) sequentially penetrates through the bottom wall of the first mounting groove (11) and the positive electrode insulating plate (4) and is riveted with the positive electrode riveting block (2);
the negative electrode insulating plate (5) is arranged in the second mounting groove (12), a third groove (51) matched with the second limiting protrusion (121) is formed in one side surface of the negative electrode insulating plate (5), a second limiting groove (52) is formed in the other side surface of the negative electrode insulating plate (5), a second anti-torsion protrusion (521) is convexly arranged on the side wall of the second limiting groove (52), the negative electrode riveting block (3) is arranged in the second limiting groove (52), the negative electrode riveting block (3) is provided with a fourth groove (31) matched with the second anti-torsion protrusion (521), and the negative electrode column (7) sequentially penetrates through the bottom wall of the second mounting groove (12), the negative electrode insulating plate (5) and is riveted with the negative electrode riveting block (3);
the outline of the first limiting protrusion (111) is different from the outline of the second limiting protrusion (121), the first limiting protrusion (111) and the second limiting protrusion (121) are rectangular blocks, and the joint of two side walls of the first limiting protrusion (111) on the outline is an arc chamfer; and the second limiting bulge (121) is provided with a hypotenuse notch at the joint of one side wall of the profile.
2. The battery top cover assembly according to claim 1, wherein the first mounting groove (11) has two first limit protrusions (111) therein, the two first limit protrusions (111) being symmetrically disposed on opposite side walls 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 according to claim 1, wherein the first anti-twisting protrusions (421) and the first grooves (41) are integrally press-molded; the second anti-torsion protrusion (521) and the second groove (21) are integrally formed by stamping.
4. The battery top cap assembly according to claim 1, wherein the top cap sheet body (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).
5. The battery top cover assembly according to claim 1, wherein the positive electrode post (6) comprises a first post (61) and a second post (62) which are sequentially connected, the first post (61) is used for penetrating into the top cover sheet body (1) and the positive electrode insulating plate (4), the first post (61) is used for penetrating into the positive electrode riveting block (2), the diameter of the first post (61) is larger than that of the second post (62), the second post (62) is coaxial with the first post (61), a first annular boss (611) is arranged on the end face, connected with the second post (62), of the first post (61), the first annular boss (611) is arranged around the second post (62), and a first annular groove (621) is formed on the second post (62); the negative pole post (7) is including the third cylinder (71) and fourth cylinder (72) that connect gradually, third cylinder (71) are used for wearing to locate in top cap lamellar body (1) with in positive pole insulation board (4), fourth cylinder (72) are used for wearing to locate in positive pole riveting piece (2), the diameter of third cylinder (71) is greater than fourth cylinder (72), third cylinder (71) with fourth cylinder (72) are coaxial, third cylinder (71) with have second annular boss (711) on the terminal surface that fourth cylinder (72) are connected, second annular boss (711) are encircleed fourth cylinder (72) are arranged, have second annular recess (721) on fourth cylinder (72).
6. The battery top cover assembly according to claim 5, wherein insulating sealing rings (8) are sleeved on the side walls of the first column body (61) and the third column body (71).
7. The battery top cap assembly according to claim 6, wherein the insulating seal ring (8) has a length in the axial direction of the first cylinder (61) that is longer 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).
8. A power battery, characterized in that the power battery adopts the battery top cover assembly according to any one of claims 1 to 7 and a lower housing (9), and the top cover sheet body (1) of the battery top cover assembly is covered on the lower housing (9).
9. A power cell as claimed in claim 8, characterized in that the second side (1 b) is provided with protruding plastic structural members (14) which match the openings 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 |
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| CN202211257920.2A CN115458845B (en) | 2022-10-13 | 2022-10-13 | Battery top cover assembly and power battery |
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| CN115458845A CN115458845A (en) | 2022-12-09 |
| CN115458845B true 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 (4)
| 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 |
| 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 |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 (4)
| 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 |
| 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 |
| 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 |
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| CN115458845A (en) | 2022-12-09 |
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