CN110581307A - assembly structure and assembly method of battery top cover and pole - Google Patents
assembly structure and assembly method of battery top cover and pole Download PDFInfo
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- CN110581307A CN110581307A CN201910789333.XA CN201910789333A CN110581307A CN 110581307 A CN110581307 A CN 110581307A CN 201910789333 A CN201910789333 A CN 201910789333A CN 110581307 A CN110581307 A CN 110581307A
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- pole
- metal
- top cover
- metal block
- plastic
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 221
- 239000002184 metal Substances 0.000 claims abstract description 221
- 239000004033 plastic Substances 0.000 claims abstract description 116
- 229920003023 plastic Polymers 0.000 claims abstract description 116
- 238000003466 welding Methods 0.000 claims abstract description 31
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 7
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 6
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010073 coating (rubber) Methods 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008961 swelling Effects 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
- 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
Landscapes
- 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)
Abstract
The invention discloses an assembly structure of a battery top cover and a pole, which comprises a top cover plate, a first pole and a second pole, wherein the first pole and the second pole are arranged on the top cover plate, a first plastic part is formed between the first pole and the top cover plate in an encapsulating manner, a second plastic part is formed between the second pole and the top cover plate in an encapsulating manner, the first pole comprises a first metal block and at least one first metal nail in concave-convex fit with the first metal block, the first metal nail is welded on the first metal block, the second pole comprises a second metal block and at least one second metal nail in concave-convex fit with the second metal block, and the second metal nail is welded on the second metal block. According to the invention, the pole is not formed by friction welding, the production cost of assembling the top cover and the pole can be reduced, the overall overcurrent capacity of the pole can be improved, and meanwhile, the stability between the pole and the battery cover plate is improved, which is beneficial to improving the safety performance of the battery core. In addition, the invention also discloses an assembly method of the battery top cover and the pole.
Description
Technical Field
The invention belongs to the technical field of battery production and manufacturing, and particularly relates to an assembly structure and an assembly method of a battery top cover and a pole.
Background
With the development of modern society and the enhancement of environmental awareness of people, more and more devices select a lithium battery as a power supply, such as mobile phones, notebook computers, electric tools, electric automobiles and the like, so that a wide space is provided for the application and development of the lithium battery. Among them, lithium batteries used in electric tools, electric vehicles, and the like are generally called power batteries. The structure of the pole and the top cover of the power battery and the quality of the manufacturing process directly influence the performance of the lithium ion battery cell and even the whole battery.
among them, chinese patent document discloses a post-protruding battery cover plate (publication No. CN 208570681U), comprising: the battery cover plate comprises a battery cover plate, wherein a positive electrode assembly and a negative electrode assembly are respectively arranged at the left end and the right end of the top of the battery cover plate; the battery cover plate is formed by buckling an upper cover plate and a lower cover plate; the explosion-proof insulating device comprises an upper cover plate, a lower cover plate and an explosion-proof insulating device, wherein the left side and the right side of the upper cover plate and the left side and the right side of the lower cover plate are respectively provided with a positive electrode mounting hole and a negative electrode mounting hole, and the left side and the right side of the lower cover plate are detachably assembled with the. The above solution prevents the swelling of the battery to some extent, but the inventors have found that this solution has at least the following drawbacks: firstly, the structure is complex and is not easy to disassemble and assemble; secondly, the pole is composed of a bottom base and a cylinder and needs to be connected by a friction welding process, so that the cost is increased; thirdly, the stability between the pole and the battery cover plate is poor, the pole and the battery cover plate are easy to lose efficacy due to factors such as environment and the like, and the safety risk is large.
Disclosure of Invention
one of the objects of the present invention is: to the not enough of prior art, provide an assembly structure of battery top cap and utmost point post, save and form utmost point post through friction weld, can reduce the manufacturing cost of top cap and utmost point post assembly, can also improve the holistic ability of overflowing of utmost point post, simultaneously, improve steadiness between utmost point post and the battery apron, help improving the security performance of electric core.
In order to achieve the purpose, the invention adopts the following technical scheme:
The assembly structure of the battery top cover and the pole comprises a top cover plate, a first pole and a second pole, wherein the first pole and the second pole are installed on the top cover plate, a first plastic part is formed between the first pole and the top cover plate in an encapsulated manner, a second plastic part is formed between the second pole and the top cover plate in an encapsulated manner, the first pole comprises a first metal block and at least one first metal nail in concave-convex fit with the first metal block, the first metal nail is welded on the first metal block, the second pole comprises a second metal block and at least one second metal nail in concave-convex fit with the second metal block, and the second metal nail is welded on the second metal block.
As an improvement of the assembly structure of the battery top cover and the pole column, a first groove matched with the first metal nail is formed in the bottom of the first metal block, the end of the first metal nail is welded to the first groove, a second groove matched with the second metal nail is formed in the bottom of the second metal block, and the end of the second metal nail is welded to the second groove.
As an improvement of the battery top cap and pole assembling structure, a first step is arranged at the top of the first metal block, the first plastic part is provided with a first convex hull matched with the first step, a second step is arranged at the top of the second metal block, and the second plastic part is provided with a second convex hull matched with the second step.
as an improvement of the assembly structure of the battery top cover and the pole, the top cover piece is further provided with at least one of an explosion-proof valve air hole and a liquid injection hole, an explosion-proof valve is arranged between the top cover piece and the lower plastic, and a protective film is arranged at the top of the explosion-proof valve air hole.
As an improvement of the assembly structure of the battery top cover and the pole, a sealing ring is sleeved between the first metal nail and the top cover piece, a sealing ring is sleeved between the second metal nail and the top cover piece, a first connecting sheet is welded at the bottom end of the first metal nail, a second connecting sheet is welded at the bottom end of the second metal nail, and lower plastic cement is arranged between the first connecting sheet and the top cover piece and between the second connecting sheet and the top cover piece.
As an improvement of the battery top cover and pole assembling structure, the first metal block and the second metal block are both made of aluminum or copper-aluminum composite materials, the first metal nail and the first connecting sheet are in a copper-aluminum welding structure, and the second metal nail and the second connecting sheet are in an aluminum-copper welding structure.
As an improvement of the battery top cover and pole assembling structure, the top cover plate is provided with pole mounting holes, the first pole and the second pole respectively penetrate through the pole mounting holes to be fixed on the top cover plate, concave portions are formed at the tops of the pole mounting holes, and the first plastic part and the second plastic part are respectively accommodated in the concave portions.
The first plastic part and the first pole post are integrally formed by encapsulation and injection molding, the second plastic part and the second pole post are integrally formed by encapsulation and injection molding, and the first plastic part and the second plastic part are integrally formed by PPS (polyphenylene sulfide) plastic, PSU (polystyrene) plastic or nano plastic.
As an improvement of the assembly structure of the battery top cover and the pole, the first plastic part is conductive plastic, the second plastic part is insulating plastic, and the resistance of the conductive plastic is 10 Ω ~ 30000 Ω.
As an improvement of the assembly structure of the battery top cover and the pole, the resistance of the conductive plastic is 1001 Ω ~ 30000 Ω.
The invention also aims to provide an assembling method of a battery top cover and a pole, which comprises the following steps:
At least one first metal nail is in concave-convex fit with a first metal block, and then the first metal nail is welded to the first metal block to form a first pole;
At least one second metal nail is in concave-convex fit with a second metal block, and then the second metal nail is welded to the second metal block to form a second pole;
the first pole column and the second pole column are installed on a top cover plate, then a first plastic piece is encapsulated between the first pole column and the top cover plate, and a second plastic piece is encapsulated between the second pole column and the top cover plate.
It should be noted that: in the assembly method of the invention, the first metal nail is matched with the first metal block in a concave-convex way, the second metal nail is matched with the second metal block in a concave-convex way, the first metal nail is welded on the first metal block, the second metal nail is welded on the second metal block, the assembling method is easy to assemble, reduces the assembling difficulty of the pole, ensures the stability between the metal nail and the metal block, even if the metal nails and the metal blocks are made of different materials, the high-cost friction welding or fusion welding process is not needed, the whole assembly cost of the top cover and the pole is reduced, in addition, compared with the pole with a cylindrical structure, the first metal block and the second metal block can be welded with a plurality of metal nails, the metal nails are not mutually influenced in the welding process, the overcurrent capacity is improved, the quantity of the first metal nails and the quantity of the second metal nails are both two, but the quantity of the first metal nails and the quantity of the second metal nails can be increased according to the actual overcurrent requirement.
The invention has the beneficial effects that the pole comprises a top cover plate, a first pole and a second pole, wherein the first pole and the second pole are installed on the top cover plate, a first plastic part is formed between the first pole and the top cover plate in an encapsulating manner, a second plastic part is formed between the second pole and the top cover plate in an encapsulating manner, the first pole comprises a first metal block and at least one first metal nail in concave-convex fit with the first metal block, the first metal nail is welded on the first metal block, the second pole comprises a second metal block and at least one second metal nail in concave-convex fit with the second metal block, and the second metal nail is welded on the second metal block. Because utmost point post generally comprises end base and the cylinder of connection on the subbase, both materials are different, it forms this structure to need friction weld, the cost is higher, and utmost point post is from last down assembly riveting, lead to the risk increase of utmost point post because of environmental factor inefficacy, therefore, first metal peg and the unsmooth cooperation of first metal block, second metal peg and the unsmooth cooperation of second metal block, first metal peg welds in first metal block, second metal peg welds in the second metal block, this kind of structure easily produces and assembles, guarantee the steadiness between metal peg and the metal block, even the material of metal peg and metal block is different, if: copper-aluminum welding, a high-cost friction welding or fusion welding process is not needed, the overall assembly cost of the top cover and the pole is favorably reduced, in addition, compared with the pole with a cylindrical structure, the first metal block 11 and the second metal block 21 can be used for welding a plurality of metal nails, and the metal nails are not mutually influenced in the welding process, so that the overcurrent capacity of the pole is favorably improved, wherein the number of the first metal nails and the number of the second metal nails are two, and the number of the first metal nails and the number of the second metal nails can be increased according to the actual overcurrent requirement; first plastic part and first utmost point post become an organic whole structure through the rubber coating, ensure that first plastic part can wrap up first utmost point post, realize the electric connection function of first plastic part and first utmost point post, second plastic part and second utmost point post are through the rubber coating structure of becoming an organic whole, ensure that second plastic part wraps up second utmost point post, realize the insulating function of second plastic part and second utmost point post, and simultaneously, owing to adopt the mode of rubber coating, improve mechanical properties between the two, prevent that first utmost point post or second utmost point post from receiving external environment to influence to take place not hard up. According to the invention, the pole is not formed by friction welding, the production cost of assembling the top cover and the pole can be reduced, the overall overcurrent capacity of the pole can be improved, and meanwhile, the stability between the pole and the battery cover plate is improved, which is beneficial to improving the safety performance of the battery core.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
fig. 2 is an exploded view of the present invention.
Fig. 3 is a schematic sectional view of the assembled first pole and top cover plate of the present invention.
Fig. 4 is a schematic sectional view of the second pole and the top cover plate of the present invention after assembly.
Fig. 5 is an exploded view of the first pole of the present invention.
fig. 6 is an exploded view of the second pole of the present invention.
Wherein: 1-a first pole; 2-a second pole; 3-top cover sheet; 11-a first metal block; 12-a first metal nail; 111-a first recess; 112-a first step; 21-a second metal block; 22-a second metal nail; 211-a second recess; 212-a second step; 31-vent hole of explosion-proof valve; 32-liquid injection hole; 33-pole mounting hole; 331-a recess; 41-a first plastic part; 411-first convex hull; 42-a second plastic part; 421-second convex hull; 5-sealing ring; 61-a first connecting tab; 62-a second connecting sheet; 7-discharging plastic; 8-an explosion-proof valve; 9-protective film.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in FIG. 1 ~ 6, an assembly structure of a battery top cover and a pole comprises a top cover plate 3, a first pole 1 and a second pole 2 which are installed on the top cover plate 3, a first plastic part 41 is formed between the first pole 1 and the top cover plate 3 in an encapsulating mode, a second plastic part 42 is formed between the second pole 2 and the top cover plate 3 in an encapsulating mode, the first pole 1 comprises a first metal block 11 and at least one first metal nail 12 which is in concave-convex fit with the first metal block 11, the first metal nail 12 is welded on the first metal block 11, the second pole 2 comprises a second metal block 21 and at least one second metal nail 22 which is in concave-convex fit with the second metal block 21, the second metal nail 22 is welded on the second metal block 21, the pole is generally composed of a base seat and a cylinder connected to the base seat, the pole is made of different materials, the structure needs friction welding, the cost is high, the pole is assembled and riveted from top to bottom, the pole, the risk of pole failure caused by environmental factors is increased, therefore, the first metal nail 12 and the metal nail are welded on the metal nail 12, the metal nail 21, the metal nail and the metal nail are integrally welded on the metal nail, the second pole 2, the metal nail is not affected by the plastic part, the plastic nail and the plastic nail, the plastic nail is easily, the plastic nail and the plastic nail, the plastic nail are all of the plastic nail are not needed metal nail, the plastic nail are not affected by the plastic nail, the plastic nail.
Preferably, the bottom of the first metal block 11 is provided with a first groove 111 matched with the first metal nail 12, the end of the first metal nail 12 is welded to the first groove 111, the bottom of the second metal block 21 is provided with a second groove 211 matched with the second metal nail 22, and the end of the second metal nail 22 is welded to the second groove 211. The end part of the first metal nail 12 is equivalently embedded into the first groove 111, the end part of the second metal nail 22 is equivalently embedded into the second groove 211, the firmness between the metal block and the metal nail is better than that of a pole adopting friction welding, the overcurrent performance between the metal block and the metal nail is ensured, the process of friction welding or riveting is omitted, the production cost is reduced, and the safety performance of the top cover is improved; wherein, welding is carried out along the gap formed between the first groove 111 and the first metal nail 12, and welding is carried out along the gap formed between the second groove 211 and the second metal nail 22, the manufacturing process is simple, and the production cost is reduced.
preferably, the first metal block 11 is provided with a first step 112 at the top thereof, the first plastic part 41 is provided with a first convex hull 411 matched with the first step 112, the second metal block 21 is provided with a second step 212 at the top thereof, and the second plastic part 42 is provided with a second convex hull 421 matched with the second step 212. First convex closure 411 and second convex closure 421 play the effect of fastening first step 112 and second step 212 to play the effect of fastening utmost point post, form a body structure, improve mechanical properties between the two, prevent that first utmost point post 1 or second utmost point post 2 from receiving the influence of external environment to take place to become flexible.
Preferably, the sealing ring 5 is sleeved between the first metal nail 12 and the top cover plate 3, the sealing ring 5 is sleeved between the second metal nail 22 and the top cover plate 3, the first connecting sheet 61 is welded at the bottom end of the first metal nail 12, the second connecting sheet 62 is welded at the bottom end of the second metal nail 22, and the lower plastic 7 is arranged between the first connecting sheet 61 and the top cover plate 3 as well as between the second connecting sheet 62 and the top cover plate 3. The seal ring 5 plays a role in fastening the first metal nail 12 or the second metal nail 22, preventing the first metal nail 12 or the second metal nail 22 from shifting, and in addition, preventing the electrolyte from corroding the first plastic part 41 and the second plastic part 42 through a gap; the bottom end of the first metal nail 12 is welded with a first connecting sheet 61, and the bottom end of the second metal nail 22 is welded with a second connecting sheet 62, so that the first pole 1 and the second pole 2 can be prevented from falling off from the top cover plate 3, the fastening connection effect is realized, and the first pole 1 and the second pole 2 can be conveniently connected with the battery pole lug; lower plastic 7 plays the effect of insulating top sheet 3 and connection piece, reduces the probability of taking place the short circuit, still improves the insulating properties of top sheet 3 and electric core, prevents that electrolyte from corroding top sheet 3 and leading to the battery short circuit.
Preferably, the first metal block 11 and the second metal block 21 are both made of aluminum or copper-aluminum composite material, the first metal nail 12 and the first connecting piece 61 are in a welded structure of copper and aluminum, and the second metal nail 22 and the second connecting piece 62 are in a welded structure of aluminum and copper. Because the price of the aluminum material is lower than that of the copper material, when the negative current collector is made of a copper foil material, the second metal nail 22 and the second connecting sheet 62 are made of materials corresponding to the negative current collector, and the second metal block 21 is made of an aluminum material, the quality of the battery can be guaranteed not to be affected, and the production cost of the negative electrode is reduced; when the positive current collecting piece is made of an aluminum foil material, the first metal block 11, the first metal nail 12 and the first connecting piece 61 are made of aluminum materials, so that the quality of the battery can be guaranteed not to be affected, the production cost of the positive electrode is reduced, and the connecting strength can be improved.
Preferably, the top cover plate 3 is provided with a pole mounting hole 33, the first pole 1 and the second pole 2 are fixed to the top cover plate 3 through the pole mounting hole 33, a recess 331 is formed at the top of the pole mounting hole 33, and the first plastic part 41 and the second plastic part 42 are respectively accommodated in the recess 331. Adopt the design of concave part 331, guaranteed the steadiness between top cap piece 3 and each post, saved riveted process, help reduction in production cost, improve production efficiency, in addition, the function that this kind of design not only guaranteed the battery is not influenced, can also reduce the top cap and occupy the inside space of battery, makes the inside bigger electric core that can place of battery to improve the energy density of battery.
Preferably, the top cover plate 3 is further provided with at least one of an explosion-proof valve vent hole 31 and a liquid injection hole 32, an explosion-proof valve 8 is installed between the top cover plate 3 and the lower plastic 7, and a protective film 9 is installed on the top of the explosion-proof valve vent hole 31. Annotate inside liquid hole 32 is convenient for pour into battery into electrolyte into, explosion-proof valve 8 can make the automatic quick pressure release of battery because the battery rises to the internal short circuit of overcharge, overdischarge, overflow and battery leads to the battery, avoids the battery explosion to lead to the emergence of incident, and protection film 9 can prevent that external impurity from entering into explosion-proof valve 8 in, influences explosion-proof valve 8's function.
Preferably, the first plastic part 41 and the first pole 1 are integrally formed by encapsulation, the second plastic part 42 and the second pole 2 are integrally formed by encapsulation, and the first plastic part 41 and the second plastic part 42 are integrally formed by PPS plastic, PSU plastic or nano plastic. PPS plastics, PSU plastics, nanometer plastics all have high temperature resistant, corrosion-resistant, superior mechanical properties and insulating properties, help improving the life of first plastic part 41 and second plastic part 42 to improve the quality of battery, and have good environmental protection performance and fire prevention efficiency, more accord with the environmental protection requirement in new energy automobile field, can adopt PPS plastics, PSU plastics or nanometer plastics to form first plastic part 41 and second plastic part 42 according to the needs of the structure and the cost of battery.
Preferably, the first plastic part 41 is conductive plastic, the second plastic part 42 is insulating plastic, and the resistance of the conductive plastic is 10 Ω ~ 30000 Ω, the first plastic part 41 is conductive plastic, and the second plastic part 42 is insulating plastic, so that when high temperature and high pressure occur in the battery, the positive pole column and the negative pole column can be connected by normally turning over the turning sheet, and an internal protection loop is formed, so as to prevent the battery from exploding, limit the resistance of the conductive plastic, prevent the resistance of the conductive plastic from being too large, so that the protection loop cannot be formed, and prevent the safety performance of the battery from being affected by the too small resistance of the conductive plastic.
Example 2
The difference from the embodiment 1 is that the resistance of the conductive plastic of the embodiment is 1001 Ω ~ 30000 Ω, the resistance of the conductive plastic is further limited, and when the battery fails, the positive pole and the negative pole are connected to form an internal protection loop, and meanwhile, the safety performance of the battery is guaranteed.
The other structures are the same as those of embodiment 1, and are not described again here.
Example 3
As shown in fig. 1 ~ 6, a method of assembling a battery top cover and a terminal post, comprising:
Embedding at least one first metal nail 12 into a first groove 111 at the bottom of a first metal block 11, and then welding along a gap formed between the first groove 111 and the first metal nail 12, so that the first metal nail 12 is welded to the first metal block 11 to form a first pole 1;
Embedding at least one second metal nail 22 into a second groove 211 at the bottom of the second metal block 21, and then welding along a gap formed between the second groove 211 and the second metal nail 22, so that the second metal nail 22 is welded to the second metal block 21 to form a second pole column 2;
Accommodating the first pole 1 and the second pole 2 in the concave portion 331 of the pole mounting hole 33, then encapsulating the first plastic part 41 between the first pole 1 and the top cover plate 3, and encapsulating the second plastic part 42 between the second pole 2 and the top cover plate 3; meanwhile, the first metal nail 12 and the first connecting piece 61 adopt a welding structure of copper and aluminum, and the second metal nail 22 and the second connecting piece 62 adopt a welding structure of aluminum and copper.
it should be noted that: the first metal nail 12 is in concave-convex fit with the first metal block 11, the second metal nail 22 is in concave-convex fit with the second metal block 21, the first metal nail 12 is welded on the first metal block 11, and the second metal nail 22 is welded on the second metal block 21, the assembling method is easy to assemble, the assembling difficulty of the pole is reduced, meanwhile, the stability between the metal nails and the metal blocks is ensured, even if the materials of the metal nails and the metal blocks are different, the high-cost friction welding or fusion welding process is not needed, the whole assembling cost of the top cover and the pole is reduced, in addition, compared with the pole with a cylindrical structure, the first metal block 11 and the second metal block 21 can be welded with a plurality of metal nails, the welding is carried out along the gap formed between the first groove 111 and the first metal nail 12, and the welding is carried out along the gap formed between the second groove 211 and the second metal nail 22, the manufacturing process is simple, and the metal nails are not influenced each other in the welding process, the overcurrent capacity is improved, wherein the number of the first metal nails 12 and the number of the second metal nails 22 are two, but the number of the first metal nails 12 and the number of the second metal nails 22 can be increased according to the actual overcurrent requirement; by adopting the design of the concave part 331, the stability between the top cover plate 3 and each pole column is ensured, the riveting procedure is omitted, the production cost is reduced, and the production efficiency is improved; the plastic part plays a role in fastening the pole, forms an integrated structure, improves the mechanical property between the plastic part and the pole, and prevents the first pole 1 or the second pole 2 from loosening under the influence of the external environment; first metal peg 12 and first connection piece 61 adopt the welded structure of copper and aluminium, and second metal peg 22 and second connection piece 62 adopt the welded structure of aluminium and copper, can guarantee that the quality of battery is not influenced, reduce anodal manufacturing cost, can also improve the intensity of connecting.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides an assembly structure of battery top cap and utmost point post which characterized in that: the novel pole comprises a top cover plate (3), a first pole column (1) and a second pole column (2), wherein the first pole column (1) and the top cover plate (3) are encapsulated to form a first plastic part (41), the second pole column (2) and the top cover plate (3) are encapsulated to form a second plastic part (42), the first pole column (1) comprises a first metal block (11) and at least one first metal nail (12) which is in concave-convex fit with the first metal block (11), the first metal nail (12) is welded to the first metal block (11), the second pole column (2) comprises a second metal block (21) and at least one second metal nail (22) which is in concave-convex fit with the second metal block (21), and the second metal nail (22) is welded to the second metal block (21).
2. The structure of claim 1, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: the bottom of first metal block (11) be provided with first recess (111) of first metal peg (12) complex, the tip of first metal peg (12) weld in first recess (111), the bottom of second metal block (21) be provided with second metal peg (22) complex second recess (211), the tip of second metal peg (22) weld in second recess (211).
3. The structure of claim 1, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: the top of first metal block (11) is provided with first step (112), first plastic part (41) be provided with first step (112) complex first convex closure (411), the top of second metal block (21) is provided with second step (212), second plastic part (42) be provided with second step (212) complex second convex closure (421).
4. The structure of claim 1, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: the top cover plate (3) is provided with a pole mounting hole (33), the first pole (1) and the second pole (2) respectively penetrate through the pole mounting hole (33) to be fixed on the top cover plate (3), a concave portion (331) is formed at the top of the pole mounting hole (33), and the first plastic part (41) and the second plastic part (42) are respectively accommodated in the concave portion (331).
5. The structure of claim 1, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: first metal peg (12) with the cover is equipped with sealing washer (5) between top cap piece (3), second metal peg (22) with the cover is equipped with sealing washer (5) between top cap piece (3), the bottom welding of first metal peg (12) has first connection piece (61), the bottom welding of second metal peg (22) has second connection piece (62), first connection piece (61) with second connection piece (62) with be provided with down plastic (7) between top cap piece (3).
6. The structure of claim 5, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: the first metal block (11) and the second metal block (21) are made of aluminum or copper-aluminum composite materials, the first metal nail (12) and the first connecting piece (61) are of a welding structure of copper and aluminum, and the second metal nail (22) and the second connecting piece (62) are of a welding structure of aluminum and copper.
7. The structure of claim 5, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: still be provided with explosion-proof valve bleeder vent (31) on top cap piece (3) and annotate at least one in liquid hole (32), top cap piece (3) with install explosion-proof valve (8) down between plastic (7), protection film (9) are installed at explosion-proof valve bleeder vent (31) top.
8. The structure of claim 1, wherein the top cover comprises a top cover body and a terminal post body, the terminal post body comprises: the first plastic part (41) and the first pole column (1) are integrally formed through encapsulation, the second plastic part (42) and the second pole column (2) are integrally formed through encapsulation, and the first plastic part (41) and the second plastic part (42) are integrally formed through PPS (polyphenylene sulfide) plastic, PSU (polystyrene) plastic or nano plastic.
9. The battery top cap and pole assembly structure of claim 1, wherein the first plastic part (41) is a conductive plastic, the second plastic part (42) is an insulating plastic, the conductive plastic has a resistance of 10 Ω ~ 30000 Ω, and preferably, the conductive plastic has a resistance of 1001 Ω ~ 30000 Ω.
10. A method for assembling a battery top cover and a pole is characterized by comprising the following steps:
At least one first metal nail (12) is in concave-convex fit with a first metal block (11), and then the first metal nail (12) is welded to the first metal block (11) to form a first pole (1);
At least one second metal nail (22) is in concave-convex fit with a second metal block (21), and then the second metal nail (22) is welded to the second metal block (21) to form a second pole (2);
The method comprises the steps of installing the first pole (1) and the second pole (2) on a top cover plate (3), then encapsulating a first plastic part (41) between the first pole (1) and the top cover plate (3), and encapsulating a second plastic part (42) between the second pole (2) and the top cover plate (3).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789333.XA CN110581307A (en) | 2019-08-26 | 2019-08-26 | assembly structure and assembly method of battery top cover and pole |
| PCT/CN2020/106419 WO2021036685A1 (en) | 2019-08-26 | 2020-07-31 | Battery cover and pole assembly structure and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910789333.XA CN110581307A (en) | 2019-08-26 | 2019-08-26 | assembly structure and assembly method of battery top cover and pole |
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| CN110581307A true CN110581307A (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910789333.XA Pending CN110581307A (en) | 2019-08-26 | 2019-08-26 | assembly structure and assembly method of battery top cover and pole |
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| Country | Link |
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| CN (1) | CN110581307A (en) |
| WO (1) | WO2021036685A1 (en) |
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| CN111509150A (en) * | 2020-03-20 | 2020-08-07 | 合肥国轩高科动力能源有限公司 | Lithium ion battery's electric core structure |
| WO2021036685A1 (en) * | 2019-08-26 | 2021-03-04 | 江苏塔菲尔新能源科技股份有限公司 | Battery cover and pole assembly structure and assembly method |
| CN113644356A (en) * | 2021-07-28 | 2021-11-12 | 东莞塔菲尔新能源科技有限公司 | Utmost point ear connection structure and battery of battery top cap |
| WO2023284523A1 (en) * | 2021-07-15 | 2023-01-19 | 江苏正力新能电池技术有限公司 | Power battery top cover, battery, and electrical device |
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Also Published As
| Publication number | Publication date |
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| WO2021036685A1 (en) | 2021-03-04 |
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Effective date of registration: 20220114 Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant after: Jiangsu Zenergy Battery Technologies Co.,ltd Address before: 211100 Lantian Road 249, Airport Economic Development Zone, Jiangning District, Nanjing City, Jiangsu Province Applicant before: JIANGSU TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Applicant before: DONGGUAN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. Applicant before: SHENZHEN TAFEL NEW ENERGY TECHNOLOGY Co.,Ltd. |
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Country or region after: China Address after: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant after: Jiangsu Zhengli New Energy Battery Technology Co.,Ltd. Address before: 215500 No. 68, Xin'anjiang Road, Southeast street, Changshu, Suzhou, Jiangsu Applicant before: Jiangsu Zenergy Battery Technologies Co.,ltd Country or region before: China |
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