CN117335062A - Secondary battery top cover and secondary battery - Google Patents
Secondary battery top cover and secondary battery Download PDFInfo
- Publication number
- CN117335062A CN117335062A CN202311262579.4A CN202311262579A CN117335062A CN 117335062 A CN117335062 A CN 117335062A CN 202311262579 A CN202311262579 A CN 202311262579A CN 117335062 A CN117335062 A CN 117335062A
- Authority
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- China
- Prior art keywords
- top cover
- secondary battery
- pole
- battery top
- negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- 238000004804 winding Methods 0.000 claims description 19
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims 1
- 229910001416 lithium ion Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 239000007772 electrode material Substances 0.000 abstract description 3
- 238000005538 encapsulation Methods 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance 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
- 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
- H01M50/155—Lids or covers characterised by the material
- H01M50/157—Inorganic material
- H01M50/159—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
A secondary battery top cover and a secondary battery belong to the technical field of secondary batteries, and the specific scheme is as follows: the integrated pole of the traditional top cover is divided into two parts, namely the pole upper part and the pole lower part, wherein the pole lower part is provided with a bulge with an hollowed inside, the bottom surface of the pole upper part is tightly attached to the bulge upper surface of the pole lower part, the pole upper part and the pole lower part are connected together through laser welding, and the whole top cover is assembled and fixed together through the connecting force after the welding of the pole upper part and the pole lower part to replace the traditional top cover encapsulation and riveting fixing mode; the fixing mode of laser welding is more reliable, the overall tightness of the top cover can be greatly improved, and the tightness of the battery is further improved, so that the battery becomes safer and more reliable; the secondary battery using the top cover can save the switching sheet while ensuring that the electrode material is led to an external electronic path, simplify the battery assembly process, improve the production efficiency and reduce the production cost.
Description
Technical Field
The invention belongs to the technical field of secondary batteries, and particularly relates to a secondary battery top cover and a secondary battery.
Background
The secondary battery is increasingly used in the fields of electric vehicles and energy storage as an energy storage unit capable of being recycled. Currently, the mainstream secondary batteries are classified into square, cylindrical and soft packs according to their forms. The square secondary battery mainly comprises an external shell, a top cover, an internal switching piece, a winding core and the like.
The current mainstream assembly process of square secondary battery is to weld the lug and the transfer tab protruding from the body at two sides of the winding core, and then weld the transfer tab and the post of the top cover, so as to form an electronic path of electrode material to the outside of the battery. In addition, currently mainstream square secondary battery top covers fix the poles and the base plate together by injection molding or riveting, and separate the poles and the base plate by an insulator. The top cover in the two modes has the defects of complex structure, high difficulty in assembly and full-automatic realization, low manufacturing efficiency and the like.
Disclosure of Invention
The invention aims to simplify the structure of a top cover of a secondary battery on the premise of ensuring the reliable structure, reduce the weight and cost of the top cover and improve the manufacturing efficiency of the top cover.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a secondary battery top cap, includes light aluminum plate, positive pole upper part, positive pole lower part, negative pole upper part, negative pole lower part, two sealing washer, two upper insulating rings, integrated lower insulating piece, light aluminum plate's both ends all are provided with through-hole I, and two outer fringe of through-hole I all is provided with annular groove, and two sealing washer cover are established respectively on the lateral wall of two annular groove inner rings, and two upper insulating rings are embedded respectively inside the inside wall of two annular groove outer rings, positive pole upper part and negative pole upper part are placed respectively on two sealing rings and are located corresponding upper insulating ring inside; the position that the both ends of insulating part corresponds through-hole I under the integral type is provided with through-hole II, and the outer fringe of two through-holes II all upwards is provided with insulating annular arch, and two insulating annular archs correspond and imbeds in two through-holes I, the positive pole lower part includes positive pole arch, positive pole arch passes one of them through-hole II laminates and laser welding together with the positive pole upper part bottom surface that corresponds, negative pole lower part includes the negative pole arch, negative pole protruding passes the bottom surface laminating and laser welding together of another through-hole II and the negative pole upper part that corresponds.
The positive pole lower part still includes the positive pole base, positive pole arch is located positive pole base upper surface and both are integrated into one piece structure, the negative pole lower part still includes the negative pole base, the negative pole arch is located the upper surface of negative pole base and both are integrated into one piece structure.
Further, the middle part of one end of the positive pole base close to the center of the top cover is provided with a U-shaped groove in the direction away from the center of the top cover, and the middle part of one end of the negative pole base close to the center of the top cover is provided with a U-shaped groove in the direction away from the center of the top cover.
Further, the lower surface of the positive pole bulge and the lower surface of the negative pole bulge are upwards provided with groove structures, and the groove structures correspond to the positions of the corresponding positive pole bulge and the corresponding negative pole bulge.
Further, an annular flange I is integrally arranged on the inner wall of the bottom of the upper insulating ring, the annular flange I is attached to the bottom surface of the annular groove, and the cross section of the upper insulating ring and the annular flange I is L-shaped.
Further, an annular flange II is integrally arranged on the top inner wall of the sealing ring, the annular flange II is positioned on the upper surface of the inner ring of the annular groove, and the cross section of the sealing ring and the annular flange II is in an inverted L shape.
Further, an explosion-proof valve hole is formed in the middle of the optical aluminum plate, and an explosion-proof valve is arranged in the explosion-proof valve hole.
Further, the secondary battery top cover further comprises a protection patch, and the protection patch is positioned at the position of the explosion-proof valve hole and is adhered to the light aluminum plate.
Further, the position of the integral lower insulating part corresponding to the explosion-proof valve hole is provided with an accommodating groove, two rows of vent holes are formed in the accommodating groove, and a plurality of reinforcing ribs are arranged in the middle of the two rows of vent holes.
The secondary battery comprises a winding core, a shell and a secondary battery top cover, wherein positive lugs and negative lugs are respectively arranged at two ends of the winding core, the positive lugs are correspondingly welded on the lower surface of a positive pole base of the secondary battery top cover, the negative lugs are correspondingly welded on the lower surface of a negative pole base of the secondary battery top cover, and the winding core and the secondary battery top cover are arranged in the shell together.
Compared with the prior art, the invention has the beneficial effects that:
the invention designs the secondary battery top cover which has simple and reliable structure, low cost and high manufacturing efficiency, and the secondary battery using the top cover can save the switching sheet, reduce the number of parts, simplify the battery assembly process, improve the production efficiency, reduce the production cost and the weight and improve the energy density of the battery while ensuring that an electrode material leads to an external electronic path.
Drawings
Fig. 1 is an exploded view of a top cap of a secondary battery;
fig. 2 is an isometric view of an assembled secondary battery top cap;
fig. 3 is a top view of an assembled secondary battery top cover;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
fig. 5 is an enlarged view of a portion B in fig. 4;
FIG. 6 is a schematic view of a winding core structure;
FIG. 7 is a schematic view of the welding of the winding core to the top cover;
FIG. 8 is a schematic view of the core being welded to the top cover and then being in the shell;
FIG. 9 is a schematic view of the winding core and top cover after being cased;
in the figure, 1, a light aluminum plate; 2. a positive electrode post upper member; 3. a positive electrode post lower member; 4. a negative electrode column upper member; 5. a negative electrode column lower member; 6. a seal ring; 7. an insulating ring is arranged on the upper part; 8. an integral lower insulator; 9. the coil core, 10, the shell, 11, the through holes I, 12, the annular grooves, 13, the explosion-proof valve holes, 14, the explosion-proof valve, 15, the protection patch, 31, the positive pole bulge, 32, the positive pole base, 51, the negative pole bulge, 52, the negative pole base, 53, the U-shaped groove, 54, the groove structure, 61, the annular flanges II, 71, the annular flanges I, 81, the through holes II, 82, the insulation annular bulge, 83, the accommodating groove, 84, the vent holes, 85, the reinforcing ribs, 91, the positive lugs, 92 and the negative lugs.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and examples, and it is apparent that the described examples are only some, but not all, of the examples of the invention, and all other examples obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.
Example 1
The secondary battery top cover comprises an optical aluminum plate 1, an anode post upper part 2, an anode post lower part 3, a cathode post upper part 4, a cathode post lower part 5, two sealing rings 6, two upper insulating rings 7 and an integrated lower insulating part 8, wherein through holes I11 are formed in two ends of the optical aluminum plate 1, annular grooves 12 are formed in the outer edges of the two through holes I11, the two sealing rings 6 are respectively sleeved on the outer side walls of the inner rings of the two annular grooves 12, the two upper insulating rings 7 are respectively embedded into the inner side walls of the outer rings of the two annular grooves 12, and the anode post upper part 2 and the cathode post upper part 4 are respectively placed on the two sealing rings 6 and are positioned in the corresponding upper insulating rings 7; the position that the through-hole I11 corresponds at the both ends of insulating part 8 under the integral type is provided with through-hole II 81, and the outer fringe of two through-holes II 81 all upwards is provided with insulating annular protruding 82, and two insulating annular protruding 82 correspond and imbeds in two through-holes I11, positive post lower part 3 includes ascending positive post protruding 31, positive post protruding 31 passes from the top cap bottom one of them through-hole II 81 closely laminates and laser welding together with the bottom surface of the positive post upper part 2 that corresponds, negative post lower part 5 includes ascending negative post protruding 51, negative post protruding 51 passes another through-hole II 81 from the top cap bottom and closely laminates and laser welding together with the bottom surface of the negative post upper part 4 that corresponds to link together whole top cap.
Further, the shape of the upper insulating ring 7 is not limited, and may be circular, polygonal, elliptical, racetrack, or a shape of the upper insulating ring with rounded corners or deformed keyways added thereto.
Further, the lower positive electrode column part 3 further includes a positive electrode column base 32, the positive electrode column protrusion 31 is located on the upper surface of the positive electrode column base 32 and is in an integral structure with the positive electrode column base 32, the lower negative electrode column part 5 further includes a negative electrode column base 52, and the negative electrode column protrusion 51 is located on the upper surface of the negative electrode column base 52 and is in an integral structure with the negative electrode column base 52.
Further, the middle part of the end of the positive pole base 32 near the center of the top cover is provided with a U-shaped groove 53 in the direction away from the center of the top cover, and the middle part of the end of the negative pole base 52 near the center of the top cover is provided with a U-shaped groove in the direction away from the center of the top cover.
Further, the lower surfaces of the positive electrode post protrusions 31 and the negative electrode post protrusions 51 are respectively provided with a groove structure 54, the groove structures 54 correspond to the positions of the corresponding positive electrode post protrusions 31 and negative electrode post protrusions 51, the positive electrode post protrusions 31 and the negative electrode post protrusions 51 are respectively of thin-wall structures, and laser irradiates upwards from the bottom surfaces of the positive electrode post protrusions 31 and the negative electrode post protrusions 51 to enable the laser to be welded with corresponding pole upper parts.
Further, an annular flange I71 is integrally arranged on the inner wall of the bottom of the upper insulating ring 7, the annular flange I (71) is attached to the bottom surface of the annular groove (12), the cross section of the upper insulating ring 7 and the annular flange I71 is L-shaped, and the bottom surface of the upper positive pole component 2 is ensured not to be in contact with the aluminum plate 1.
Further, an annular flange II 62 is integrally arranged on the top inner wall of the sealing ring 6, the annular flange II (61) is located on the upper surface of the inner ring of the annular groove (12), the cross section of the sealing ring 6 and the annular flange II 61 is in an inverted L shape, and the bottom surface of the upper part 2 of the positive pole is ensured not to be in contact with the aluminum plate 1.
Further, an explosion-proof valve hole 13 is formed in the middle of the optical aluminum plate 1, and an explosion-proof valve 14 is installed in the explosion-proof valve hole 13.
Further, the secondary battery top cover further comprises a protection patch 15, and the protection patch 15 is positioned at the explosion-proof valve hole 13 and is adhered to the light aluminum plate 1.
Further, the position of the integrated lower insulating member 8 corresponding to the explosion-proof valve hole 13 is provided with an accommodating groove 83, two rows of vent holes 84 are arranged in the accommodating groove 83, and a plurality of reinforcing ribs 85 are arranged in the middle of the two rows of vent holes 84. When the battery is out of control, a large amount of gas can be generated to burst the explosion-proof valve 14 from the vent hole 84, so that the explosion caused by excessive internal pressure of the battery is prevented; the vent hole 84 is provided with a plurality of reinforcing ribs 85, so that the structural strength of the vent hole 84 can be improved, and the explosion-proof valve 14 and an insulating piece at the vent hole 84 are prevented from being broken together by gas generated by the out-of-control of the battery, so that dangerous substances in the battery are not blocked by the battery to be sprayed out, and the out-of-control accident is further worsened.
The integrated pole of the traditional top cover is divided into two parts, namely the pole upper part and the pole lower part, wherein the pole lower part is provided with a bulge with an hollowed inside, the bottom surface of the pole upper part is tightly attached to the bulge upper surface of the pole lower part, the pole upper part and the pole lower part are connected together through laser welding, and the whole top cover is assembled and fixed together through the connecting force after the welding of the pole upper part and the pole lower part to replace the traditional top cover encapsulation and riveting fixing mode; the fixing mode of laser welding is more reliable, the overall tightness of the top cover can be greatly improved, and the tightness of the battery is further improved, so that the battery becomes safer and more reliable; the laser welding process can enable the assembly of the top cover to be fully automatic, reduce the manufacturing cost of the top cover and improve the manufacturing efficiency of the top cover.
The sealing ring 6 is clamped between the upper pole part and the lower pole part, the upper pole part and the lower pole part are firmly fixed inside the top cover after laser welding, and the connection formed by laser welding is stable and firm, so that the resilience force of the sealing ring 6 after compression can be effectively resisted for a long time, the long-term effective sealing performance of the top cover is ensured, and the safety problem caused by the sealing failure of the top cover in the long-term use process of the battery is avoided.
The outer edges of the through holes II 81 on two sides of the integrated lower insulating piece 8 are respectively provided with an insulating annular bulge 82 upwards, and the design can completely separate the pole from the optical aluminum plate 1 and improve the insulating property between the pole and the optical aluminum plate 1.
The outer edge of the through holes I11 on two sides of the optical aluminum plate 1 is provided with an annular groove 12, two sealing rings 6 are respectively sleeved on the outer side walls of the inner rings of the two annular grooves 12, two upper insulating rings 7 are respectively embedded into the inner side walls of the outer rings of the two annular grooves 12, the upper positive pole column component 2 and the upper negative pole column component 4 are respectively placed on the two sealing rings 6 and positioned in the corresponding upper insulating rings 7, the structure can reduce the external height of a battery, improve the internal space utilization rate of the battery pack, and under the battery pack structure of the same structure, the usable height of the inside of a battery monomer can be improved, thereby improving the energy density of the battery.
Example 2
The secondary battery comprises a winding core 9, a shell 10 and the secondary battery top cover in the embodiment 1, wherein the two ends of the winding core 9 are respectively provided with a positive electrode lug 91 and a negative electrode lug 92, the positive electrode lug 91 is correspondingly welded on the lower surface of a positive electrode column base 32 of the secondary battery top cover, the negative electrode lug 92 is correspondingly welded on the lower surface of a negative electrode column base 52 of the secondary battery top cover, and the winding core 9 and the secondary battery top cover are arranged in the shell 10 together.
Further, the two ends of the winding core 9 are provided with the positive electrode lug 91 and the negative electrode lug 92 protruding out of the body, the homopolar electrode lugs are welded and gathered together, and then the welded and gathered positive electrode lug 91 and negative electrode lug 92 are respectively correspondingly attached to the lower parts of the positive electrode column base 32 and the negative electrode column base 52 of the top cover and welded together through laser.
The invention can simplify the battery assembly process, improve the battery assembly efficiency and reduce the battery processing cost;
in the prior art, the assembly process flow of the square secondary battery is S1, the tab of the winding core 9 is welded with the adapter piece; s2, welding the switching piece with the top cover; s3, placing the welded winding core 9, the transfer sheet and the top cover into the shell 10 together, and welding the shell 10 and the top cover. The top cover provided by the invention can replace the functions of the top cover and the switching piece in the prior art, namely, the switching piece in the battery can be canceled; the top cover is different from the traditional top cover integrated pole, and adopts a split pole upper part and a pole lower part, wherein the structure of the pole lower part is similar to a transfer sheet in the prior art, but a pole bulge is arranged in the middle, and the pole bulge can be welded with the bottom of the pole upper part by laser, so that the optical aluminum plate 1, the upper insulating ring 7, the sealing ring 6 and the integrated lower insulating part 8 are fixed together. The process flow of the battery assembly using the top cover can be simplified to S1, and the plurality of layers of lugs of the winding core 9 are gathered and bonded together through ultrasonic welding; s2, the electrode lug welded in the previous step is directly welded on the electrode post base of the electrode post lower part through laser; s3, placing the welded winding core 9 and the top cover into the shell together, injecting electrolyte, and welding the shell and the top cover.
The invention can reduce the number of parts in the battery, reduce the weight and cost of the battery and improve the energy density of the battery; the battery assembly process can be simplified, the production efficiency of the battery can be improved, and the battery processing cost can be reduced.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A secondary battery top cap, characterized in that: the lithium ion battery cell comprises a light aluminum plate (1), an anode column upper part (2), an anode column lower part (3), a cathode column upper part (4), a cathode column lower part (5), two sealing rings (6), two upper insulating rings (7) and an integrated lower insulating part (8), wherein through holes I (11) are formed in two ends of the light aluminum plate (1), annular grooves (12) are formed in the outer edges of the two through holes I (11), the two sealing rings (6) are respectively sleeved on the outer side walls of inner rings of the two annular grooves (12), the two upper insulating rings (7) are respectively embedded into the inner side walls of outer rings of the two annular grooves (12), and the anode column upper part (2) and the cathode column upper part (4) are respectively placed on the two sealing rings (6) and located in the corresponding upper insulating rings (7); the position that the both ends of insulating part (8) correspond through-hole I (11) under the integral type is provided with through-hole II (81), and the outer fringe of two through-holes II (81) all upwards is provided with insulating annular protruding (82), and in two insulating annular protruding (82) corresponding embedding through-holes I (11), positive post lower part (3) include positive post protruding (31), positive post protruding (31) pass one of them through-hole II (81) and the laminating of corresponding positive post upper part (2) bottom surface and laser welding are in the same place, negative post lower part (5) include negative post protruding (51), negative post protruding (51) pass another through-hole II (81) and the laminating of the bottom surface of corresponding negative post upper part (4) and laser welding are in the same place.
2. The secondary battery top cover according to claim 1, wherein: the positive pole lower part (3) further comprises a positive pole base (32), the positive pole bulge (31) is located on the upper surface of the positive pole base (32) and is of an integrated structure, the negative pole lower part (5) further comprises a negative pole base (52), and the negative pole bulge (51) is located on the upper surface of the negative pole base (52) and is of an integrated structure.
3. The secondary battery top cover according to claim 2, wherein: the middle part of one end of the positive pole base (32) close to the center of the top cover is provided with a U-shaped groove (53) in the direction away from the center of the top cover, and the middle part of one end of the negative pole base (52) close to the center of the top cover is provided with a U-shaped groove in the direction away from the center of the top cover.
4. The secondary battery top cover according to claim 1, wherein: the lower surfaces of the positive pole bulges (31) and the negative pole bulges (51) are upwards provided with groove structures (54), and the groove structures (54) correspond to the positions of the corresponding positive pole bulges (31) and negative pole bulges (51).
5. The secondary battery top cover according to claim 1, wherein: an annular flange I (71) is integrally arranged on the inner wall of the bottom of the upper insulating ring (7), the annular flange I (71) is attached to the bottom surface of the annular groove (12), and the cross section of the upper insulating ring (7) and the annular flange I (71) is L-shaped.
6. The secondary battery top cover according to claim 1, wherein: an annular flange II (61) is integrally arranged on the top inner wall of the sealing ring (6), the annular flange II (61) is positioned on the upper surface of the inner ring of the annular groove (12), and the cross section of the sealing ring (6) and the annular flange II (61) is in an inverted L shape.
7. The secondary battery top cover according to claim 1, wherein: an explosion-proof valve hole (13) is formed in the middle of the optical aluminum plate (1), and an explosion-proof valve (14) is arranged in the explosion-proof valve hole (13).
8. The secondary battery top cover according to claim 7, wherein: the secondary battery top cover further comprises a protection patch (15), and the protection patch (15) is positioned at the position of the explosion-proof valve hole (13) and is adhered to the light aluminum plate (1).
9. The secondary battery top cover according to claim 7, wherein: the position of the integrated lower insulating piece (8) corresponding to the explosion-proof valve hole (13) is provided with a containing groove (83), two rows of vent holes (84) are formed in the containing groove (83), and a plurality of reinforcing ribs (85) are arranged in the middle of the two rows of vent holes (84).
10. A secondary battery characterized in that: the secondary battery top cover comprises a winding core (9), a shell (10) and the secondary battery top cover according to any one of claims 1-9, wherein positive lugs (91) and negative lugs (92) are respectively arranged at two ends of the winding core (9), the positive lugs (91) are correspondingly welded on the lower surface of a positive pole base (32) of the secondary battery top cover, the negative lugs (92) are correspondingly welded on the lower surface of a negative pole base (52) of the secondary battery top cover, and the winding core (9) and the secondary battery top cover are arranged in the shell (10) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311262579.4A CN117335062A (en) | 2023-09-27 | 2023-09-27 | Secondary battery top cover and secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311262579.4A CN117335062A (en) | 2023-09-27 | 2023-09-27 | Secondary battery top cover and secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117335062A true CN117335062A (en) | 2024-01-02 |
Family
ID=89294475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311262579.4A Pending CN117335062A (en) | 2023-09-27 | 2023-09-27 | Secondary battery top cover and secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117335062A (en) |
-
2023
- 2023-09-27 CN CN202311262579.4A patent/CN117335062A/en active Pending
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