CN217589182U - Square battery top cover sealing structure - Google Patents
Square battery top cover sealing structure Download PDFInfo
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- CN217589182U CN217589182U CN202221655489.2U CN202221655489U CN217589182U CN 217589182 U CN217589182 U CN 217589182U CN 202221655489 U CN202221655489 U CN 202221655489U CN 217589182 U CN217589182 U CN 217589182U
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- top cap
- plastic
- utmost point
- point post
- sealing
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- 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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Abstract
The utility model relates to the technical field of batteries, a square battery top cap seal structure is disclosed, include: lower plastic and top cap piece, the plastic top is equipped with the top cap piece down, utmost point post mounting groove has been seted up at plastic top both ends down, utmost point post mounting groove inside is equipped with the welding aluminium ring, welding aluminium ring top is equipped with the sealing washer, the inside utmost point post that is equipped with of sealing washer, be equipped with the plastic sealing member between utmost point post outer wall and the top cap piece, the utility model discloses mould plastics the plastic sealing member, then assemble utmost point post and top cap piece, improve the yield, seal through adopting plastic sealing member cooperation sealing washer between welding aluminium ring and the utmost point post, realize the multi-seal between top cap piece and the utmost point post, through the seal structure that welding aluminium ring, sealing washer and plastic sealing member formed simultaneously, the assembly is simple.
Description
Technical Field
The utility model relates to the technical field of batteries, specifically be square battery top cap seal structure.
Background
At present, a square hard shell structure is generally adopted by a power battery of a new energy automobile, a power battery shell comprises a shell body and a top cover assembly, the power battery shell provides a closed space for accommodating an electrode assembly and electrolyte, and electric energy of the electrode assembly is led out of the closed space from the inside of the closed space through a pole of the top cover assembly.
The existing square battery top cover plate and the pole are connected through injection molding, and the PPS injection molding process is adopted (the top cover plate, the positive/negative pole block, the sealing ring and the top cover plate are assembled and then placed in a film cavity of an injection mold to carry out PPS injection molding, so that the top cover of an integrated injection molding structure is formed). Helium detection (helium detection: the leakage rate of a sealing ring in a test pole area is required to be 1.0x10-7/Pa.m ^ 3/s)/electrical property detection (the withstand voltage in a negative electrode test is 200Mohm under the voltage of 500V, and the resistance value in a positive electrode test is 2-10000 ohm) is required after the sealing structure is assembled.
The laminating area of utmost point post and sealing washer is less in current square battery top cap piece assembling process, has reduced top cap subassembly's firm and leakproofness, when helium is examined, because the leakproofness is not enough, causes the yields of top cap product to be lower.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a square battery top cap seal structure to the laminating area of utmost point post and sealing washer in the current square battery top cap piece assembling process who proposes among the solution above-mentioned background art is less, has reduced the firm problem with the leakproofness of top cap subassembly.
In order to achieve the above object, the utility model provides a following technical scheme: square battery top cap seal structure includes: lower plastic and top cap piece, the plastic top is equipped with the top cap piece down, utmost point post mounting groove has been seted up at plastic top both ends down, the inside welding aluminium ring that is equipped with of utmost point post mounting groove, welding aluminium ring top is equipped with the sealing washer, the inside utmost point post that is equipped with of sealing washer, be equipped with the plastic sealing member between utmost point post outer wall and the top cap piece, top cap piece top both ends are located the utmost point post outside and are equipped with utmost point post and draw forth the groove, plastic central authorities are equipped with explosion-proof groove down, explosion-proof hole has been seted up to top cap piece central authorities, explosion-proof hole internally mounted has explosion-proof valve, the explosion-proof valve top is equipped with the protection film.
Furthermore, the middle part of the pole is provided with a flange, and when the pole is installed, the flange is positioned between the plastic sealing element and the sealing ring.
Furthermore, the plastic sealing element is in a stepped ring shape with a high inner ring height and a low outer ring height, the inner ring of the plastic sealing element is abutted against the outer wall of the upper half part of the pole column, the outer ring of the plastic sealing element is pressed below the top cover plate, and the bottom of the top cover plate is positioned at the crimping part of the outer ring of the plastic sealing element and provided with a pressing groove.
Further, the sealing washer is that the inner circle height is low, and the high step of outer lane height is cyclic annular, sealing washer inner circle and utmost point post lower half outer wall butt, a part of sealing washer outer lane is pressed in plastic sealing member below, and another part is pressed in the top cap piece below, sealing washer outer lane step department central authorities have seted up the ring channel.
Furthermore, one side of the top of the welding aluminum ring is abutted against the top cover plate, and a pressure groove is formed in the contact part of the bottom of the top cover plate and the welding aluminum ring.
Furthermore, the two ends of the lower plastic are positioned outside the pole mounting groove and provided with pole claw grooves.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a top cap piece that sets up, sealing washer and plastic sealing member, realized when square battery top cap seal structure uses, cancel the process of moulding plastics between current top cap piece and the utmost point post, mould plastics the plastic sealing member earlier, then assemble utmost point post and top cap piece, adopt plastic sealing member cooperation sealing washer to seal through welding between aluminium ring and the utmost point post, realize the multichannel sealing between top cap piece and the utmost point post, avoided because of the welding hole, the rosin joint, welding defects such as broken weld lead to follow-up helium to examine badly, helium is examined the yield and is promoted, the yield is improved, the productivity is improved, simultaneously through welding aluminium ring, the seal structure that sealing washer and plastic sealing member formed, the assembly is simple, the requirement can reduce to utmost point post height, do benefit to and reduce utmost point post cost.
Drawings
Fig. 1 is an exploded view of the top cap sealing structure of the square battery of the present invention;
fig. 2 is a top perspective view of the square battery top cap sealing structure of the present invention;
fig. 3 is a bottom perspective view of the square battery top cap sealing structure of the present invention;
fig. 4 is the enlarged view of the partial cross-sectional view of the pole connecting structure of the square battery top cover sealing structure of the present invention.
In the figure: 1-feeding plastic cement; 101-polar claw groove; 2-top cover sheet; 3-an explosion-proof groove; 4-pole mounting groove; 5-welding an aluminum ring; 6-pole leading-out groove; 7-sealing ring; 8-plastic sealing element; 9-pole column; 10-explosion-proof hole; 11-an explosion-proof valve; 12-protective film.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: square battery top cap seal structure includes: lower plastic 1 and top cap piece 2, 1 top of lower plastic is equipped with top cap piece 2, utmost point post mounting groove 4 has been seted up at 1 top both ends of lower plastic, 4 internal weld of utmost point post mounting groove have welding aluminium ring 5, 5 top joints of welding aluminium ring have sealing washer 7, 7 internal joints of sealing washer have utmost point post 9, the joint has plastic sealing member 8 between utmost point post 9 outer wall and the top cap piece 2, 2 top both ends of top cap piece are located utmost point post 9 outside and have seted up utmost point post and draw forth groove 6, carry out the sealed of utmost point post 9 bottom through 5 cooperation sealing washers 7 of welding aluminium ring, carry out the sealed at utmost point post 9 top through 8 cooperation sealing washers 7 of plastic sealing member.
Explosion-proof groove 3 has been seted up to 1 central authorities of lower plastic, explosion-proof hole 10 has been seted up to top cap piece 2 central authorities, explosion-proof hole 10 internally mounted has explosion-proof valve 11, explosion-proof valve 11 and the 10 junction of explosion-proof hole scribble the colloid, be convenient for the sealing of 11 mountings of explosion-proof valve, explosion-proof valve 11 top is equipped with protection film 12, be used for the protection, explosion-proof valve 11 is used for when the inside pressure of battery is too big, through the blasting of explosion-proof valve 11, release battery internal pressure, thereby promote the security of battery.
The flange is arranged in the middle of the pole 9, when the pole 9 is installed, the flange position is located between the plastic sealing element 8 and the sealing ring 7, and the sealing sheet 7 and the plastic sealing element 8 are matched with the flange of the pole 9 to fix and seal the pole conveniently.
The plastic sealing member 8 is the PPS material, is the inner circle height, and the step that the outer lane is high is cyclic annular, and 8 inner circles of plastic sealing member and the first outer wall butt of 9 utmost point posts, 8 outer lane pressures of plastic sealing member are in top cap piece 2 below, and 2 bottoms of top cap piece are located 8 outer lane crimping positions of plastic sealing member and have seted up the indent, and the top cap piece 2 of being convenient for and the laminating of 8 plastic sealing member are inseparable.
5 top one side of welding aluminium ring and 2 looks butt of top cap piece, the indent has been seted up with 5 contact site of welding aluminium ring to 2 bottoms of top cap piece, and utmost point claw groove 101 has been seted up to 1 both ends of lower plastic being located the 4 outsides of utmost point post mounting groove, and the utmost point post 9 and the utmost point claw of being convenient for are connected.
During assembly, in order to ensure the air tightness of the assembled product and meet the requirement of helium detection, the welding aluminum ring 5 and the top cover plate 2 can be fused together by welding at the contact part of the outer peripheral surface of the welding aluminum ring 5 and the top cover plate 2 in a laser welding mode, so that the strength is ensured, and the requirements of mechanical performance, stress and the like of the material are met.
The working principle is as follows: when square battery top cap seal structure uses, the process of moulding plastics between current top cap piece and the utmost point post is cancelled, it moulds plastics with plastic sealing member 8 earlier, then assemble utmost point post 9 and top cap piece 2, adopt plastic sealing member 8 to cooperate sealing washer 7 to seal through welding between aluminium ring 5 and the utmost point post 9, realize the multichannel sealed between top cap piece 2 and the utmost point post 9, avoided because of the welding hole, the rosin joint, welding defects such as broken weld lead to follow-up helium to examine badly, helium examines the yield and promotes, the yield is improved, improve the productivity, simultaneously through welding aluminium ring 5, the seal structure that sealing washer 7 and plastic sealing member 8 formed, the assembly is simple, the high requirement to utmost point post 9 can reduce, do benefit to reduction utmost point post cost.
Claims (6)
1. Square battery top cap seal structure includes: lower plastic (1) and top cap piece (2), its characterized in that: plastic (1) top is equipped with top cap piece (2) down, utmost point post mounting groove (4) have been seted up at plastic (1) top both ends down, utmost point post mounting groove (4) inside is equipped with welding aluminium ring (5), welding aluminium ring (5) top is equipped with sealing washer (7), sealing washer (7) inside is equipped with utmost point post (9), be equipped with plastic sealing member (8) between utmost point post (9) outer wall and top cap piece (2), top cap piece (2) top both ends are located utmost point post (9) outside and are equipped with utmost point post and draw forth groove (6), plastic (1) central authorities are equipped with explosion-proof groove (3) down, explosion-proof hole (10) have been seted up to top cap piece (2) central authorities, explosion-proof hole (10) internally mounted has explosion-proof valve (11), explosion-proof valve (11) top is equipped with protection film (12).
2. The prismatic cell top cap seal structure of claim 1, wherein: a flange is arranged in the middle of the pole (9), and when the pole (9) is installed, the flange is located between the plastic sealing element (8) and the sealing ring (7).
3. The prismatic cell top cap sealing structure according to claim 1, wherein: the plastic sealing element (8) is that the inner circle is high, and the step that the outer lane is high is cyclic annular, plastic sealing element (8) inner circle and first outer wall butt of utmost point post (9), plastic sealing element (8) outer lane is pressed in top cap piece (2) below, the indent has been seted up at plastic sealing element (8) outer lane crimping position to top cap piece (2) bottom.
4. The prismatic cell top cap sealing structure according to claim 1, wherein: sealing washer (7) are that the inner circle is highly low, and the step that the outer lane is highly high is cyclic annular, sealing washer (7) inner circle and utmost point post (9) lower half outer wall butt, sealing washer (7) outer lane partly pressure is in plastic sealing member (8) below, and another part is pressed in top cap piece (2) below, sealing washer (7) outer lane step department central authorities have seted up the ring channel.
5. The prismatic cell top cap sealing structure according to claim 1, wherein: one side of the top of the welding aluminum ring (5) is connected with the top cover piece (2) in an abutting mode, and a pressing groove is formed in the contact position of the bottom of the top cover piece (2) and the welding aluminum ring (5).
6. The prismatic cell top cap sealing structure according to claim 1, wherein: and the two ends of the lower plastic (1) are positioned outside the pole mounting groove (4) and provided with pole claw grooves (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221655489.2U CN217589182U (en) | 2022-06-30 | 2022-06-30 | Square battery top cover sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221655489.2U CN217589182U (en) | 2022-06-30 | 2022-06-30 | Square battery top cover sealing structure |
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| Publication Number | Publication Date |
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| CN217589182U true CN217589182U (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221655489.2U Active CN217589182U (en) | 2022-06-30 | 2022-06-30 | Square battery top cover sealing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642352A (en) * | 2022-10-28 | 2023-01-24 | 楚能新能源股份有限公司 | Secondary battery, top cap assembly and assembling method thereof |
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2022
- 2022-06-30 CN CN202221655489.2U patent/CN217589182U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642352A (en) * | 2022-10-28 | 2023-01-24 | 楚能新能源股份有限公司 | Secondary battery, top cap assembly and assembling method thereof |
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