CN112838301A - Battery top cover, battery and battery preparation process - Google Patents
Battery top cover, battery and battery preparation process Download PDFInfo
- Publication number
- CN112838301A CN112838301A CN202110152720.XA CN202110152720A CN112838301A CN 112838301 A CN112838301 A CN 112838301A CN 202110152720 A CN202110152720 A CN 202110152720A CN 112838301 A CN112838301 A CN 112838301A
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- battery
- cover plate
- pole
- insulating
- sealing ring
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 41
- 238000001746 injection moulding Methods 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 76
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 claims 1
- 238000010073 coating (rubber) Methods 0.000 abstract description 5
- 210000004027 cell Anatomy 0.000 description 16
- 239000003792 electrolyte Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000004734 Polyphenylene sulfide Substances 0.000 description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention relates to a battery top cover, a battery and a battery preparation process, wherein the battery top cover comprises a cover plate, an insulating top plate, a mounting assembly and a pole column, the cover plate is provided with a containing cavity, the containing cavity penetrates through two side surfaces of the cover plate in the thickness direction, the pole column is spaced from the cavity wall of the containing cavity, the pole column is fixed in the containing cavity through the mounting assembly, the mounting assembly is of an annular structure, the mounting assembly is sleeved outside the pole column and seals a gap between the pole column and the cavity wall, the insulating top plate is covered on one side surface of the cover plate, which is deviated from a battery core of the battery, and the insulating top plate is provided with a avoiding hole for avoiding the pole. Fix utmost point post on the apron through the installation component to establish the one side that the apron deviates from the electric core of battery through insulating roof lid, with the protection of realization to the apron, simple structure. Meanwhile, the insulating top plate is used for replacing the traditional top cover rubber coating injection molding mode, so that the manufacturing cost is favorably reduced, and the production efficiency is further improved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery top cover, a battery comprising the battery top cover and a battery preparation process.
Background
With the development of new energy, the market demand of lithium ion batteries is increasing. At present, the top cover of the battery is manufactured by processes of pole encapsulation injection molding, riveting, laser welding and the like in the battery industry. For example, in a relatively common top cover manufacturing process, a plurality of parts for fixing the pole and insulating the isolation pole need to be assembled and welded with the cover plate, and finally, the pole and the parts are protected by encapsulation and injection molding. This top cap part is more, and the structure is complicated, and assembly process is loaded down with trivial details, is unfavorable for improving battery preparation efficiency.
Disclosure of Invention
The invention aims to provide a battery top cover, a battery and a battery preparation process, which are simple in structure, high in production efficiency and low in manufacturing cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a pair of battery top cover, including apron, insulating roof, installation component and utmost point post, the apron is provided with and holds the chamber, it runs through to hold the chamber the both sides face of apron thickness direction, utmost point post with the chamber wall interval that holds the chamber, utmost point post passes through the installation component is fixed hold the intracavity, the installation component is the loop configuration, the installation component cover is established outside the utmost point post and sealed utmost point post with hold the clearance between the chamber wall in chamber, insulating roof lid is located the apron deviates from the side of the electric core of battery, insulating roof is offered and is used for dodging the hole of dodging of utmost point post, so that utmost point post can pass dodge the hole to deviating from the direction extension of apron.
Further, the mounting assembly comprises a sealing ring and a supporting piece, the sealing ring and the supporting piece are of annular structures, the sealing ring is located in the containing cavity and close to the insulating top plate, the supporting piece is located in the containing cavity and far away from the insulating top plate, the outer ring side face of the sealing ring and the outer ring side face of the supporting piece are connected with the cavity wall, and the inner ring side face of the sealing ring and the inner ring side face of the supporting piece are connected with the pole column.
Further, utmost point post includes utmost point post body and set up in first boss on the lateral wall of utmost point post body, first boss deviates from the one end orientation of utmost point post body the chamber wall extension in holding the chamber, first boss is located the sealing washer with between the support piece.
Further, the outer ring side of sealing washer includes two first lateral surfaces and the second lateral surface that is the contained angle setting, first lateral surface with the second lateral surface all with chamber wall butt, the inner ring side of sealing washer includes two first medial surfaces and the second medial surface that are the contained angle setting, first medial surface with first boss butt, the second medial surface with the lateral wall butt of utmost point post body.
Further, the apron including the apron body with set up in the apron body orientation the bellying of one side of insulating roof, the bellying encloses to be located the week portion of utmost point post, the bellying is including being first bellying and the second bellying that the contained angle set up, the one end of first bellying with this body coupling of apron, the other end of first bellying with the one end of second bellying is connected, the second bellying is kept away from the one end orientation of first bellying the center that holds the chamber extends, the second bellying orientation a side of utmost point post with the second lateral surface butt of sealing washer.
Furthermore, the post and one of the supporting pieces is provided with a first groove, the other of the post and the supporting piece is provided with a first convex column matched with the first groove, and the first convex column is spliced with the first groove.
Furthermore, the first grooves are distributed at intervals along the circumferential direction of the pole or the supporting piece.
Further, the mounting assembly further comprises a fixing piece, the fixing piece is connected with the cover plate, and the supporting piece is clamped between the fixing piece and the pole.
Furthermore, the cover plate is far away from one side of the insulating top plate is concavely provided with a mounting groove, the accommodating cavity is communicated with the bottom of the mounting groove, and the fixing piece is mounted in the mounting groove.
Furthermore, one of the fixing piece and the supporting piece is provided with a second groove, the other of the fixing piece and the supporting piece is provided with a second convex column matched with the second groove, and the second convex column is spliced with the second groove.
Furthermore, the second grooves are distributed at intervals along the circumferential direction of the fixing piece or the supporting piece.
Further, the supporting piece is formed between the pole and the cavity wall of the containing cavity in an injection molding mode.
Furthermore, the number of the two pole columns is two, the two pole columns are respectively a positive pole column and a negative pole column, and the support piece connected with the positive pole column contains conductive particles, so that the positive pole column is electrically connected with the cover plate through the support piece.
Further, the insulating top plate is bonded with the cover plate.
Furthermore, an explosion-proof valve is arranged on the cover plate, an explosion-proof hole is formed in the insulating top plate, the outlet end of the explosion-proof valve is communicated with the explosion-proof hole, a protective film is arranged on the insulating top plate, and the protective film is used for selectively plugging the explosion-proof hole.
Furthermore, the battery top cover further comprises an insulating support, and the insulating support is arranged on one side face, facing the battery core, of the cover plate.
Also provides a battery, which comprises the battery top cover.
Also provides a battery preparation process for preparing the battery, which comprises the following steps:
step S1, respectively manufacturing and molding the cover plate, the insulating top plate, the pole, the sealing ring and the fixing piece of the mounting assembly;
s2, assembling the cover plate, the sealing ring and the pole to clamp the sealing ring between the pole and the cover plate, welding the fixing piece and the cover plate, and forming an injection molding cavity with an opening at one end among the cover plate, the sealing ring, the pole and the fixing piece;
step S3, injection molding the injection molding cavity to form a support piece;
step S4, installing an insulating support on one side surface of the cover plate facing the battery core of the battery, wherein the cover plate, the installation assembly, the pole and the insulating support form a top cover assembly;
step S5, connecting the top cover assembly with a pole piece assembly of the battery cell, installing the pole piece assembly in a shell of the battery cell, and welding and sealing the top cover assembly with an opening of the shell;
step S6, battery liquid injection;
and step S7, mounting the insulating top plate on one side surface of the cover plate, which is far away from the battery core.
Further, in step S1, the fixing member is formed by forging.
Further, in step S2, after the fixing element is welded, pressure is applied to the pole along a direction away from the battery cell, so that the sealing ring is compressed between the pole and the cover plate.
Further, in step S7, a back adhesive is disposed on a side surface of the insulating top plate facing the cover plate, and the insulating top plate and the cover plate are bonded by the back adhesive.
Compared with the prior art, the invention has the beneficial effects that:
according to the battery top cover, the battery and the battery preparation method, the pole is fixed on the cover plate through the mounting assembly, and the insulating top plate is covered on one side of the cover plate, which is far away from the battery core of the battery, so that the cover plate is protected, and the structure is simple. Meanwhile, the insulating top plate is used for replacing the traditional top cover rubber coating injection molding mode, so that the production time is saved, and the production efficiency is improved.
Drawings
Fig. 1 is an exploded view of a battery top cover of an embodiment.
Fig. 2 is a cross-sectional view of a battery top cap of an embodiment.
Fig. 3 is an enlarged view of a portion a in fig. 2.
FIG. 4 is a schematic view of an angle of the supporting member according to the embodiment.
FIG. 5 is a schematic view of another angle of the support member according to the embodiment.
Fig. 6 is a schematic view of a pole of an embodiment.
Fig. 7 is a cross-sectional view of a pole of an embodiment.
Fig. 8 is a cross-sectional view of a seal ring of an embodiment.
Fig. 9 is a schematic view of a fixing member of an embodiment.
In the figure:
1. a cover plate; 11. a first boss portion; 12. a second boss portion; 13. a liquid injection hole; 14. an accommodating chamber; 2. an insulating top plate; 21. avoiding holes; 22. a protective film; 23. an explosion-proof hole; 24. a second boss; 3. a seal ring; 31. a first outer side; 32. a second outer side; 33. a first inner side; 34. a second inner side; 4. a support member; 41. a first convex column; 42. a second convex column; 5. a fixing member; 51. a connecting end; 52. a second groove; 6. a pole column; 61. a first boss; 62. a first groove; 63. mounting a step; 7. and an insulating support.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
As shown in fig. 1 to 9, the battery top cap provided by the invention is mounted on a battery core, and includes a cover plate 1, an insulating top plate 2, a mounting assembly and a terminal post 6, wherein the cover plate 1 is provided with a containing cavity 14, the containing cavity 14 penetrates through two side surfaces of the cover plate 1 in the thickness direction, the terminal post 6 is spaced from the cavity wall of the containing cavity 14, the terminal post 6 is fixed on the cavity wall of the containing cavity 14 through the mounting assembly, and at least part of the terminal post 6 is contained in the containing cavity 14. The mounting assembly is of an annular structure, is sleeved outside the pole 6 and seals a gap between the pole 6 and the cavity wall of the accommodating cavity 14. The side of apron 1 electric core that deviates from the battery is located to 2 lids of insulating roof, and insulating roof 2 offers the hole 21 of dodging that is used for dodging utmost point post 6 to make utmost point post 6 can pass and dodge hole 21 and extend to the direction of keeping away from apron 1. It can be understood that the battery comprises a battery core and a battery top cover arranged at one end of the battery core, the battery core comprises a shell and a pole piece assembly accommodated in the shell, the battery top cover is arranged at one end of the shell, a cavity is formed between the shell and the battery top cover, and the pole piece assembly is arranged in the cavity and is filled with electrolyte. There is utmost point post 6 on the battery top cap, utmost point post 6's one end and electric core electric connection, and utmost point post 6's the other end is used for being connected with external equipment to realize the charge-discharge of battery. In this embodiment, the cover plate 1 is used to close the opening of the housing, so that a cavity for installing the pole piece assembly and filling the electrolyte is formed between the housing and the cover plate 1. Meanwhile, the cover plate 1 is also used for installing the pole 6, and the electric connection with external equipment is realized through the pole 6. The number of the polar columns 6 is two, the two polar columns 6 are respectively a positive pole column and a negative pole column, and the positive pole column and the negative pole column are arranged at intervals along the length direction of the cover plate 1. The cover plate 1 is provided with a containing cavity 14 for installing the pole 6, two ends of the containing cavity 14 are opened, and two open ends of the containing cavity are respectively communicated with a cavity of the battery and the outside of the battery. The mounting assembly is used for fixing the pole 6 on the cover plate 1 and sealing an opening of the accommodating cavity 14, so that the electrolyte inside the battery cell is prevented from leaking outside. The installation component is of an annular structure, the pole 6 is of a revolving body structure, the inner ring side surface on one side of the inner ring of the installation component is connected with the side wall of the pole 6, and the pole 6 is arranged on the installation component in a penetrating mode. The lateral surface of the outer ring on the outer ring side of the mounting assembly is connected to the wall of the receiving chamber 14, so that the pole 6 is fixed to the cover plate 1 by the mounting assembly. Because the relative both ends that hold chamber 14 communicate in the outside of cavity and battery respectively, utmost point post 6 is connected with electric core towards the one end accessible coupling assembling of electric core, and utmost point post 6 deviates from the one end of electric core and passes and hold chamber 14 and extend to the outside of battery to be connected with external equipment. The side of the cover plate 1 departing from the battery core is covered by the insulating top plate 2, the insulating top plate 2 has insulating property, and the cover plate 1 is covered by the insulating top plate 2, so that the insulating top plate 2 can realize mechanical protection and insulating protection for the cover plate 1. For making utmost point post 6 expose outside the battery, offer on the insulating roof 2 and be used for dodging utmost point post 6 and dodge hole 21 to make utmost point post 6 can pass in proper order and hold chamber 14 and dodge hole 21 and extend to the outside of battery. The battery top cap of this structure passes through the installation component and fixes utmost point post 6 on apron 1 to establish in the one side of the electric core that deviates from the battery of apron 1 through 2 lids of insulating roof, in order to realize the protection to apron 1, simple structure. Meanwhile, the insulating top plate 2 is used for replacing the traditional top cover rubber coating injection molding mode, so that the production time is saved, and the production efficiency is improved.
Specifically, the installation component includes sealing washer 3 and support piece 4, and sealing washer 3 and support piece 4 all are loop configuration, and sealing washer 3 is located and holds the one side that chamber 14 is close to insulating roof 2, and support piece 4 is located and holds one side that chamber 14 deviates from insulating roof 2, and the outer loop side of sealing washer 3 and the outer loop side of support piece 4 all are connected with the chamber wall that holds chamber 14, and the inner ring side of sealing washer 3 and the inner ring side of support piece 4 all are connected with utmost point post 6. In this embodiment, the effect of sealing washer 3 lies in fixing utmost point post 6 and sealing up the opening that holds chamber 14, and sealing washer 3 is made by the PPS material, (Polyphenylene sulfide, PPS for short), and sealing washer 3 has elasticity to make sealing washer 3 can press from both sides tightly between utmost point post 6 and the chamber wall that holds chamber 14, realize the sealed and location to utmost point post 6 that hold chamber 14. The support 4 is used for fixing the pole 6, so that the pole 6 is stably installed in the accommodating cavity 14. Sealing washer 3 and support piece 4 are the loop configuration to make sealing washer 3 and support piece 4 can overlap and establish on the outer wall of utmost point post 6, and be connected with the chamber wall that holds chamber 14 through the outer loop side that is located sealing washer 3 and support piece 4's outer loop one side, realize utmost point post 6's fixed mounting.
In order to facilitate the installation and fixation of the pole 6, the installation assembly further comprises a fixing piece 5, the fixing piece 5 is used for fixing a support piece 4, the fixing piece 5 is connected with the cover plate 1, and the support piece 4 is clamped between the fixing piece 5 and the pole 6. For the installation of mounting 5, the one side concave mounting groove that is kept away from insulating roof 2 of apron 1 is equipped with, the tank bottom of mounting groove with hold the chamber intercommunication, mounting 5 installs in the mounting groove. The mounting 5 is located the one end that holds the chamber 14 and be close to the electric core of battery, and mounting 5 is the loop configuration, and the one end that mounting 5 is close to the chamber wall that holds chamber 14 is link 51, and mounting 5 is connected fixedly through the cell wall of link 51 with the mounting groove, and the one end that mounting 5 deviates from link 51 is the free end, and the free end of mounting 5 extends towards the center of mounting groove. I.e. the side of the outer ring of the stationary part 5 that is connected to the wall of the mounting groove and the side of the inner ring of the stationary part 5 that is extended towards the center of the receiving chamber 14.
In this embodiment, for the installation of utmost point post 6 and the installation stability who improves utmost point post 6, utmost point post 6 includes utmost point post body and sets up the first boss 61 on the lateral wall of utmost point post body, and the one end orientation that first boss 61 deviates from utmost point post body is held the chamber wall extension of chamber 14, first boss 61 and utmost point post body integrated into one piece. Because first boss 61 protrusion in the outer wall of utmost point post body, when installation utmost point post 6, can peg graft between sealing washer 3 and support piece 4 with first boss 61, be favorable to improving utmost point post 6's installation stability. Of course, the support 4 is preferably injection molded. During the installation, fix utmost point post 6 in holding chamber 14 through sealing washer 3 earlier, realize the location to utmost point post 6. And then welding and fixing the side surface of the outer ring of the fixing piece 5 with the wall of the cavity, so that an injection molding cavity for accommodating the support piece 4 is formed among the fixing piece 5, the wall of the cavity, the sealing ring 3 and the pole 6, and then injecting the injection molding cavity to form the support piece 4. This mode not only accessible support piece 4 fixes utmost point post 6, can improve the whole leakproofness of installation component simultaneously, avoids the inside electrolyte of electric core to permeate along installation component's gap.
Specifically, the outer ring side of sealing washer 3 includes two first lateral surfaces 31 and the second lateral surfaces 32 that are the contained angle setting, first lateral surfaces 31 and second lateral surfaces 32 all with hold the chamber wall butt in chamber 14, the inner ring side of sealing washer 3 includes two first medial surfaces 33 and the second medial surface 34 that are the contained angle setting, first medial surface 33 and first boss 61 butt, second medial surface 34 and the lateral wall butt of utmost point post 6. In this embodiment, the sealing ring 3 is in an "L" shape, the first outer side surface 31 and the second outer side surface 32 are perpendicular to each other, the first inner side surface 33 and the second inner side surface 34 are perpendicular to each other, the first outer side surface 31 and the first inner side surface 33 are perpendicular to the axial direction of the accommodating chamber 14, and the second outer side surface 32 and the second inner side surface 34 are parallel to the axial direction of the accommodating chamber 14. The side face of the inner ring and the side face of the outer ring of the sealing ring 3 are arranged into two mutually perpendicular side faces, so that the pole 6 can be positioned along the axial direction and the radial direction of the accommodating cavity 14 respectively through the sealing ring 3, and the mounting precision of the pole 6 is improved. Preferably, the cover plate 1 includes a cover plate body and a protruding portion disposed on one side of the cover plate body facing the insulating top plate 2, the protruding portion surrounds the periphery of the pole 6, the protruding portion includes a first protruding portion 11 and a second protruding portion 12 disposed perpendicular to each other, one end of the first protruding portion 11 is connected to the cover plate body, and the first protruding portion 11 is disposed perpendicular to the cover plate body. The other end of first bellying 11 is connected with the one end of second bellying 12, and the one end that first bellying 11 was kept away from to second bellying 12 extends towards the center that holds chamber 14, and second bellying 12 is towards the outside 32 butt of a side of utmost point post 6 and the second of sealing washer 3. Through setting up first bellying 11 and second bellying 12, be favorable to the extension to hold the length of chamber 14, provide sufficient installation space for utmost point post 6 and installation component. Meanwhile, the wall of the accommodating cavity 14 is formed with an assembling step for installing the sealing ring 3 by the first protruding part 11 and the second protruding part 12, so as to facilitate the installation and positioning of the sealing ring 3.
Specifically, one of the pole 6 and the support 4 is provided with a first groove 62, the other of the pole 6 and the support 4 is provided with a first convex column 41 matched with the first groove 62, and the first convex column 41 is inserted into the first groove 62. In this embodiment, the first groove 62 is disposed on the first boss 61 of the pole 6, and the first boss 41 is disposed on the support 4. Since the pole 6 is inserted between the sealing ring 3 and the support 4 via the first projection 61, a side of the first projection 61 facing away from the sealing ring 3 abuts against the support 4. A first recess 62 opens onto a side of the first projection 61 facing away from the sealing ring 3. Because support piece 4 is pegged graft through first projection 41 and first recess 62 between the utmost point post 6, be favorable to spacing utmost point post 6, avoid utmost point post 6 to rotate around its self axis to further improve utmost point post 6's installation stability. Preferably, the first grooves 62 are multiple, and the first bosses 41 are arranged corresponding to the first grooves 62 one to one. The first grooves 62 are uniformly spaced along the circumferential direction of the pole 6. Of course, in other embodiments, a plurality of first grooves 62 may also be disposed on the support 4, a plurality of first studs 41 are disposed on the pole 6, and the plurality of first grooves 62 are distributed at intervals along the circumferential direction of the support 4.
Specifically, in order to improve the connection stability between the supporting member 4 and the fixing member 5, one of the fixing member 5 and the supporting member 4 is provided with a second groove 52, the other of the fixing member 5 and the supporting member 4 is provided with a second protrusion 42 matched with the second groove 52, and the second protrusion 42 is inserted into the second groove 52. In this embodiment, the second groove 52 is disposed on the fixing element 5, and the second protrusion 42 is disposed on the supporting element 4. The fixing member 5 has a ring-shaped structure, a free end of the fixing member 5 extends toward the center of the accommodating chamber 14, and a second recess 52 is opened at the free end of the fixing member 5. One end of the support 4 close to the inner ring thereof extends towards the direction of the battery cell, so that the support 4 can cover the side surface of the inner ring of the fixing piece 5. Preferably, the number of the second grooves 52 is multiple, and the second studs 42 are disposed corresponding to the second grooves 52 one by one. The plurality of second grooves 52 are evenly spaced in the circumferential direction of the fixing member 5. Of course, in other embodiments, a plurality of second grooves 52 may also be disposed on the supporting member 4, a plurality of second studs 42 are disposed on the fixing member 5, and a plurality of second grooves 52 are spaced apart along the circumferential direction of the supporting member 4.
Specifically, the support member 4 connected to the positive electrode post contains conductive particles, so that the positive electrode post is electrically connected to the cover plate 1 through the support member 4. It will be appreciated that the support 4 and the sealing ring 3 are made of insulating material to provide an insulating connection between the post 6 and the cover plate 1. In order to improve the safety of the battery during use, a small amount of conductive particles are added in the support piece 4 corresponding to the positive pole, so that the positive pole and the cover plate 1 can be conducted, and the positive pole and the cover plate are in a weak conductive state.
Specifically, the insulating top plate 2 is bonded to the cap plate 1. For the installation of convenient insulating roof 2, set up the gum layer at insulating roof 2 towards a side of apron 1, make insulating roof 2 and apron 1 bond through the gum layer. The shape of the insulating top plate 2 is matched with that of the cover plate 1, so that the insulating top plate 2 and the cover plate 1 can be attached together. In this embodiment, referring to fig. 3 and 7, a protruding portion is disposed on the cover plate 1, and the protruding portion extends toward one side of the cover plate 1 departing from the battery cell, so that the protruding portion protrudes from one side of the cover plate 1 departing from the battery cell. The position that corresponds with the bellying on insulating roof 2 is provided with second boss 24, and second boss 24 is the cavity structures, and the cavity in the second boss 24 communicates with a side that insulating roof 2 is close to apron 1 to the bellying that makes apron 1 can insert and locate the cavity. The avoidance hole 21 is formed in the second boss 24, and the avoidance hole 21 is communicated with the cavity. The one end that utmost point post 6 deviates from electric core is provided with installation step 63, and the one end of utmost point post 6 is passed and is dodged hole 21 and extend to the outside of battery to make the inner wall and the installation step 63 butt of second boss 24, realize insulating roof 2 and carry out comprehensive cladding to apron 1 and the installation component of installing on apron 1, play mechanical protection and the insulation protection to apron 1 and installation component.
Specifically, still be provided with explosion-proof valve on the apron 1, the both ends of explosion-proof valve communicate with the outside of the cavity of electric core and battery respectively to accessible explosion-proof valve carries out the pressure release when making the battery incident appear in the use, improves the safety in utilization. An explosion-proof hole 23 is formed in the insulating top plate 2, the outlet end of the explosion-proof valve is communicated with the explosion-proof hole 23, a protective film 22 is further arranged on the insulating top plate 2, and the protective film 22 is used for selectively plugging the explosion-proof hole 23. It can be understood that the explosion-proof valve carries out pressure relief when the internal pressure of the battery exceeds a set value, the explosion-proof hole 23 is in a state to be used under normal conditions, and the explosion-proof hole 23 is communicated with the outside of the battery only during pressure relief, so that the pressure relief is realized. The protective film 22 is covered on the explosion-proof hole 23, which is beneficial to protecting the explosion-proof hole 23 and preventing external impurities from entering the explosion-proof hole 23. The protective film 22 is made of a low-strength material, or the protective film 22 is bonded to the insulating top plate 2 by a low-viscosity adhesive layer, so that when the explosion-proof valve is depressurized, the ejected gas or liquid can burst the protective film 22, and the explosion-proof valve is communicated with the outside of the battery.
Specifically, the cover plate 1 is further provided with a liquid injection hole 13. The electrolyte injection hole 13 is used for injecting electrolyte into the battery cell. And after the electrolyte is injected, the liquid injection hole 13 is blocked.
Specifically, the battery top cover further comprises an insulating support 7, and the insulating support 7 is arranged on one side surface, facing the battery core, of the cover plate 1. The insulating support 7 is made of insulating materials, and the insulating support 7 is located between the cover plate 1 and the battery cell and plays a role in insulating protection and supporting the cover plate 1.
The remarkable effects of the embodiment are as follows: this battery top cap passes through the installation component to fix utmost point post 6 on apron 1 to establish in the one side of the electric core that the apron 1 deviates from the battery through 2 lids of insulating roof, in order to realize the protection to apron 1, simple structure. Meanwhile, the insulating top plate 2 is used for replacing the traditional top cover rubber coating injection molding mode, so that the production time is saved, and the production efficiency is improved.
Still provide a battery, including foretell battery top cap and electric core. The battery core comprises a shell and a pole piece assembly arranged in the shell, and the battery top cover is arranged at the opening end of the shell. The terminal 6 is electrically connected with the battery cell towards one end of the battery cell, so that the battery cell is connected with external equipment. This battery is owing to cover at a side of apron 1 that deviates from electric core and establish insulating roof 2, avoids apron 1 to expose outside, has good insulating properties. Meanwhile, the cover plate 1 and the pole 6 are protected by a traditional rubber coating injection molding mode, the installation is convenient, and the improvement of the production efficiency is facilitated.
Also provided is a battery preparation process, comprising the following steps:
step S1, respectively manufacturing and molding the cover plate 1, the insulating top plate 2, the pole 6, the sealing ring 3 of the mounting assembly and the fixing piece 5;
step S2, assembling the cover plate 1, the sealing ring 3 and the pole 6, clamping the sealing ring 3 between the pole 6 and the cover plate 1, welding the fixing piece 5 and the cover plate 1, and forming an injection molding cavity with an opening at one end among the cover plate 1, the sealing ring 3, the pole 6 and the fixing piece 5;
step S3, injection molding the injection molding cavity to form the support piece 4;
step S4, installing an insulating support 7 on one side surface of the cover plate 1 facing the battery core of the battery, wherein the cover plate 1, the installation assembly, the pole 6 and the insulating support 7 form a top cover assembly;
step S5, connecting the top cover assembly with the pole piece assembly of the battery cell, installing the pole piece assembly in a shell of the battery cell, and then welding and sealing the top cover assembly with an opening of the shell;
step S6, battery liquid injection;
and step S7, mounting the insulating top plate 2 on one side surface of the cover plate 1, which is far away from the battery core.
In this embodiment, in step S1, the cover plate 1 and the protruding portion on the cover plate 1 are integrally formed by press molding, the positive electrode post is made of aluminum, the negative electrode post is made of copper-aluminum alloy, and the positive and negative electrode posts are formed by punching a plate. The mounting 5 is made for metal material, and the mounting 5 adopts forging and pressing to form to improve the material density and the support intensity of mounting 5, improve the installation stability of installation component and utmost point post 6. For example, the thickness of the raw material of the fixing 5 is t1, the design thickness of the fixing 5 is t2, and t1 > t 2.
In step S2, as shown in fig. 3, the cover plate 1, the seal ring 3, and the pole 6 are assembled. The sealing ring 3 is firstly sleeved on the periphery of the pole 6, so that the first inner side surface 33 and the second inner side surface 34 of the sealing ring 3 are respectively abutted with the first boss 61 and the side wall of the pole body. Then, the pole 6 and the sealing ring 3 are inserted into the accommodating cavity 14 of the cover plate 1, and the first outer side surface 31 of the sealing ring 3 is abutted against the second protruding portion 12, so that the sealing ring 3 is clamped between the pole 6 and the cavity wall of the accommodating cavity 14. The sealing ring 3 positions and pre-fixes the pole 6, so that the pole 6 is coaxial with the accommodating cavity 14. Then welding the fixing part 5, so that the wall of the accommodating cavity 14, the sealing ring 3, the pole 6 and the fixing part 5 are surrounded to form an injection molding cavity, one side of the injection molding cavity, which faces the center of the accommodating cavity 14, is provided with an opening, and injection molding materials are filled into the injection molding cavity through the opening. In order to ensure the installation quality of the pole 6, after the fixing part 5 is welded, pressure is applied to the pole 6 in the direction away from the battery core, so that the sealing ring 3 is clamped between the pole 6 and the cover plate 1. When the fixing piece 5 is welded, the seal ring 3 becomes loose. Therefore, the pole 6 and the sealing ring 3 are extruded after the fixing piece 5 is welded, and the pole 6 and the sealing ring 3 are stably installed.
In step S3, the support member 4 is injection molded into the injection molding cavity. Specifically, make apron 1 be close to one side of electric core upwards, to inside filling injection moulding material through the opening in injection moulding chamber to make injection moulding material be full of the injection moulding chamber, so that support piece 4's surface is connected with chamber wall, sealing washer 3, utmost point post 6 and mounting 5 respectively, in order to realize fixing utmost point post 6.
In step S4, an insulating support 7 is installed on a side surface of the cover plate 1 facing the battery cell, the insulating support 7 is made of PPS material, and the insulating support 7 is formed by hot press molding. The insulating bracket 7 is fixed with the cover plate 1 by welding. And the cover plate 1, the mounting assembly, the pole 6 and the insulating support 7 form a top cover assembly.
In step S5, the top cover assembly is connected to the pole piece assembly of the electric wire, i.e., the pole 6 is connected to the tab of the pole piece assembly, and then the pole piece assembly is mounted in the housing of the electric core, and then the top cover assembly is welded to the open end of the housing, so that the top cover assembly seals the cavity of the housing.
In step S6, the electrolyte is injected through the injection hole 13 in the lid plate 1, and the cavity is filled with the electrolyte. After the filling, the pour hole 13 is closed.
In step S7, a back adhesive is disposed on a side of the insulating top plate 2 facing the cover plate 1, and the insulating top plate 2 is bonded to a side of the cover plate 1 facing away from the battery cell.
According to the process, the cover plate 1, the sealing ring 3, the pole 6 and the fixing piece 5 are assembled firstly, and then the support piece 4 is formed through injection molding, so that the pole 6 is fixed, and a top cover assembly is formed. And then the top cover assembly and the battery core are installed, the insulating top plate 2 is installed after liquid injection, the cover plate 1 is prevented from being encapsulated and injected after the cover plate 1 is installed, and the assembly efficiency is improved.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (21)
1. The utility model provides a battery top cover, a serial communication port, including apron, insulating roof, installation component and utmost point post, the apron is provided with and holds the chamber, it runs through to hold the chamber the both sides face of apron thickness direction, utmost point post with the chamber wall interval that holds the chamber, utmost point post passes through installation component fixes hold the intracavity, installation component is the loop configuration, the installation component cover is established outside and sealed utmost point post with hold the clearance between the chamber wall in chamber, insulating roof lid is located the apron deviates from the side of the electric core of battery, insulating roof is offered and is used for dodging the hole of dodging of utmost point post, so that utmost point post can pass dodge the hole to deviating from the direction extension of apron.
2. The battery top cover according to claim 1, wherein the mounting assembly comprises a sealing ring and a supporting member, the sealing ring and the supporting member are both in an annular structure, the sealing ring is located in the accommodating cavity and close to the insulating top plate, the supporting member is located in the accommodating cavity and far away from the insulating top plate, the outer ring side surface of the sealing ring and the outer ring side surface of the supporting member are both connected with the cavity wall, and the inner ring side surface of the sealing ring and the inner ring side surface of the supporting member are both connected with the pole.
3. The battery top cap of claim 2, wherein the post comprises a post body and a first boss disposed on a side wall of the post body, one end of the first boss facing away from the post body extends toward a cavity wall of the accommodating cavity, and the first boss is located between the sealing ring and the support member.
4. The battery top cap of claim 3, wherein the outer ring side of the sealing ring comprises a first outer side and a second outer side that are arranged at an included angle, the first outer side and the second outer side are both abutted to the cavity wall, the inner ring side of the sealing ring comprises a first inner side and a second inner side that are arranged at an included angle, the first inner side is abutted to the first boss, and the second inner side is abutted to the side wall of the post body.
5. The battery top cap of claim 4, wherein the cover plate comprises a cover plate body and a protrusion arranged on one side of the cover plate body facing the insulating top plate, the protrusion is arranged around the periphery of the pole, the protrusion comprises a first protrusion and a second protrusion arranged at an included angle, one end of the first protrusion is connected with the cover plate body, the other end of the first protrusion is connected with one end of the second protrusion, which is far away from the first protrusion, extends towards the center of the accommodating cavity, and the second protrusion faces one side of the pole and is abutted against the second outer side face of the sealing ring.
6. The battery top cap of claim 2, wherein one of the post and the support is provided with a first groove, and the other of the post and the support is provided with a first projection engaged with the first groove, the first projection being inserted into the first groove.
7. The battery top cap of claim 6, wherein the first grooves are a plurality of grooves, and the plurality of grooves are distributed at intervals along a circumferential direction of the pole or the support member.
8. The battery top cap of claim 2, wherein the mounting assembly further comprises a fixing member, the fixing member is connected to the cover plate, and the supporting member is sandwiched between the fixing member and the post.
9. The battery top cap of claim 8, wherein a side of the cover plate away from the insulating top plate is recessed with a mounting groove, the receiving cavity is communicated with a groove bottom of the mounting groove, and the fixing member is mounted in the mounting groove.
10. The battery top cap of claim 8, wherein one of the fixing member and the supporting member is provided with a second groove, and the other of the fixing member and the supporting member is provided with a second protrusion engaged with the second groove, the second protrusion being inserted into the second groove.
11. The battery top cover of claim 10, wherein the second groove is a plurality of grooves, and the plurality of second grooves are spaced apart along a circumferential direction of the fixing member or the supporting member.
12. The battery top cap of claim 8, wherein the support member is injection molded between the post and a wall of the receiving cavity.
13. The battery top cap of claim 2, wherein the number of the two poles is two, the two poles are respectively a positive pole and a negative pole, and the support member connected to the positive pole contains conductive particles, so that the positive pole and the cover plate are electrically connected through the support member.
14. The battery top cap of claim 1, wherein the insulating top plate is bonded to the cover plate.
15. The battery top cover according to claim 1, wherein the cover plate is provided with an explosion-proof valve, the insulating top plate is provided with an explosion-proof hole, an outlet end of the explosion-proof valve is communicated with the explosion-proof hole, and the insulating top plate is provided with a protective film which is used for selectively blocking the explosion-proof hole.
16. The battery top cap of claim 1, further comprising an insulating support disposed on a side of the cover plate facing the battery cells.
17. A battery comprising the battery top cap of any one of claims 1 to 16.
18. A process for preparing a cell for use in preparing the cell of claim 17, comprising the steps of:
step S1, respectively manufacturing and molding the cover plate, the insulating top plate, the pole, the sealing ring and the fixing piece of the mounting assembly;
s2, assembling the cover plate, the sealing ring and the pole to clamp the sealing ring between the pole and the cover plate, welding the fixing piece and the cover plate, and forming an injection molding cavity with an opening at one end among the cover plate, the sealing ring, the pole and the fixing piece;
step S3, injection molding the injection molding cavity to form a support piece;
step S4, installing an insulating support on one side surface of the cover plate facing the battery core of the battery, wherein the cover plate, the installation assembly, the pole and the insulating support form a top cover assembly;
step S5, connecting the top cover assembly with a pole piece assembly of the battery cell, installing the pole piece assembly in a shell of the battery cell, and welding and sealing the top cover assembly with an opening of the shell;
step S6, battery liquid injection;
and step S7, mounting the insulating top plate on one side surface of the cover plate, which is far away from the battery core.
19. The process for preparing a battery according to claim 18, wherein the fixing member is formed by forging and pressing in step S1.
20. The battery preparation process of claim 18, wherein in step S2, after the fixing member is welded, pressure is applied to the terminal in a direction away from the battery core, so that the sealing ring is compressed between the terminal and the cover plate.
21. The process for preparing a battery according to claim 18, wherein in step S7, a back adhesive is disposed on a side of the top insulating plate facing the cover plate, and the top insulating plate and the cover plate are bonded by the back adhesive.
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| CN202110152720.XA CN112838301A (en) | 2021-02-03 | 2021-02-03 | Battery top cover, battery and battery preparation process |
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| CN202110152720.XA CN112838301A (en) | 2021-02-03 | 2021-02-03 | Battery top cover, battery and battery preparation process |
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| CN113601147A (en) * | 2021-08-11 | 2021-11-05 | 珠海冠宇电池股份有限公司 | Device and method for processing cover assembly |
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