CN109546018B - Battery top cover and power battery using same - Google Patents
Battery top cover and power battery using same Download PDFInfo
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- CN109546018B CN109546018B CN201811428075.4A CN201811428075A CN109546018B CN 109546018 B CN109546018 B CN 109546018B CN 201811428075 A CN201811428075 A CN 201811428075A CN 109546018 B CN109546018 B CN 109546018B
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- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000001746 injection moulding Methods 0.000 claims description 51
- 238000003466 welding Methods 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 8
- 229920000069 polyphenylene sulfide Polymers 0.000 description 8
- 239000012212 insulator Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a battery top cover and a power battery using the battery top cover, wherein the battery top cover comprises a top cover plate, a first conductive module, a second conductive module, an explosion-proof valve, an upper insulating part and a lower insulating part, the top cover plate is provided with a liquid injection hole, the explosion-proof valve is arranged on the top cover plate, the left end and the right end of the top cover plate are provided with mounting holes, the upper insulating part is arranged in the mounting holes, the first conductive module and the second conductive module are respectively arranged in the mounting holes, the first conductive module is electrically connected with the top cover plate, the second conductive module is electrically insulated with the top cover plate, a first sealing part is arranged between the first conductive module and the top cover plate, a second sealing part is arranged between the second conductive module and the top cover plate, and the lower insulating part is detachably fixed on the first conductive module and the second conductive module. The invention reduces the external height of the battery and improves the utilization rate of the height space of the battery in the module.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a battery top cover and a power battery using the same.
Background
With the increasingly prominent environmental problems, low-carbon economy has become the mainstream of future economic development. The increasing air situation further promotes the rise of new energy vehicles. Hybrid electric vehicles and pure electric vehicles are also gradually accepted by manufacturers and consumers as representatives of new energy vehicles. The power battery is used as a main power source of the new energy automobile and becomes one of the key parts of the electric automobile.
As a key component of an electric automobile, a power battery has a great influence on the dynamic property, the economy and the safety of the whole automobile. With the gradual standardization of the market of power batteries, the specifications of power battery modules are gradually unified, so that standard modules with several specifications are formed, the space utilization rate of the power batteries in the modules is not high at present, and the capacity and the volume energy density of the whole module are greatly influenced.
Disclosure of Invention
The invention mainly aims to provide a battery top cover and a power battery using the battery top cover, which can reduce the external height of the battery and improve the height space utilization rate of the battery in a module.
The invention provides a battery top cover, which comprises a top cover plate, a first conductive module, a second conductive module, an explosion-proof valve, an upper insulating part and a lower insulating part, wherein the top cover plate is provided with a liquid injection hole, the explosion-proof valve is arranged on the top cover plate, the left end and the right end of the top cover plate are provided with mounting holes, the upper insulating part is arranged in the mounting holes, the first conductive module and the second conductive module are respectively arranged in the mounting holes, the first conductive module is electrically connected with the top cover plate, the second conductive module is electrically insulated with the top cover plate, a first sealing part is arranged between the first conductive module and the top cover plate, a second sealing part is arranged between the second conductive module and the top cover plate, the lower insulating part is detachably fixed on the first conductive module and the second conductive module, the first conductive module comprises a first conductive base block, a first welding plate and a first injection molding part, the first conductive base block is arranged in the first injection molding part and is electrically connected with the top cover plate through the first injection molding part, the first welding plate is sleeved and fixed on the outer side of the first injection molding part, one side of the first welding plate is fixed on the top cover plate, the other side of the first welding plate is matched with the first injection molding part to form a first groove, the second conductive module comprises a second conductive base block, a second welding plate and a second injection molding part, the second conductive base block is arranged in the second injection molding part and is electrically insulated from the top cover plate through the second injection molding part, the second welding plate is sleeved and fixed on the outer side of the second injection molding part, one side of the second welding plate is fixed on the top cover plate, the other side of the second welding plate is matched with the second injection molding part to form a second groove, and the lower insulation part can be detachably fixed on the first groove and the second groove.
Furthermore, the first welding plate and the second welding plate are both in a ring shape.
Further, the first conductive base block is an aluminum plate, and the second conductive base block is a copper-aluminum composite plate.
Furthermore, the thickness of the copper layer of the copper-aluminum composite board is 0.3-2.0 mm, and the thickness of the aluminum layer is 0.5-20.0 mm.
Further, the material of the first injection molding part is conductive PPS, and the material of the second injection molding part is insulating PPS.
Further, the resistance value of the first injection molding is 0-10000 mohm.
Further, it is equipped with a plurality of through-holes to correspond explosion-proof valve below position on the insulating part down, the insulating part includes insulating part under first insulating part and the second down, all be equipped with third recess and fourth recess under first insulating part and the second on the insulating part, the third recess cooperatees with first conductive module, the fourth recess cooperatees with the conductive module of second, be equipped with the buckle on the insulating part under the first, be equipped with the card hole that corresponds the buckle on the insulating part under the second, it is fixed with the insulating part joint under the second through insulating part under first, the insulating part is fixed on first conductive module and the conductive module of second down.
Further, the explosion-proof valve comprises an explosion-proof sheet and a protective film, an explosion-proof hole is formed in the top cover sheet, the explosion-proof sheet is arranged in the explosion-proof hole, and the protective film is arranged on the explosion-proof sheet and is arranged between the top cover sheet and the lower insulating piece.
The utility model provides a power battery, includes battery case, accommodates naked electric core and electrolyte in battery case and foretell battery top cap, and battery top cap seal mounting is on battery case.
The battery top cover and the power battery using the battery top cover have the beneficial effects that: under the prerequisite that does not influence battery inner space, eliminate the height that original utmost point post is outstanding with battery outside height for can increase electric core casing height, promote module space utilization, further promote the battery cell capacity, simplify the top cap structure simultaneously, the cost is reduced optimizes conductive module structure, promotes conductive module intensity, reduces material processing cost, lower insulating part adopts knot formula joint structure, insulating part structural strength under the reinforcing, the assembly is simple, manufacturability is strong.
Drawings
FIG. 1 is a schematic structural view of a top cover of a battery according to the present invention;
fig. 2 is an exploded view of the top cap of the battery of the present invention;
FIG. 3 is a cross-sectional view of a battery top cover of the present invention;
FIG. 4 is an enlarged partial view of A in cross-section of the cell top cover of the present invention;
fig. 5 is an exploded view of a first conductive module in a top cover of a battery of the present invention;
fig. 6 is a cross-sectional view of a first conductive module in a top cap of a battery of the present invention;
fig. 7 is a schematic view showing the structure of a lower insulating member in the top cap of the battery according to the present invention;
fig. 8 is a schematic structural diagram of the power battery of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly, and the connection may be a direct connection or an indirect connection.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 7, a battery top cover, including top cover plate 1, first conductive module 2, second conductive module 3, explosion-proof valve 4, go up insulating part 6 and lower insulating part 7, be equipped with on the top cover plate 1 and annotate liquid hole 5, explosion-proof valve 4 sets up on top cover plate 1, both ends are equipped with the mounting hole about on the top cover plate 1, it sets up in the mounting hole to go up insulating part 6, first conductive module 2, second conductive module 3 installs respectively in the mounting hole, first conductive module 2 is connected with top cover plate 1 electricity, second conductive module 3 is insulated with top cover plate 1 electricity, be equipped with first sealing member 8 between first conductive module 2 and the top cover plate 1, be equipped with second sealing member 9 between second conductive module 3 and the top cover plate 1, lower insulating part 7 can be dismantled and fix on first conductive module 2 and second conductive module 3. Through the first sealing element 8 and the second sealing element 9, the first conductive module 2 and the second conductive module 3 are hermetically installed in the installation hole and are positioned below the top cover plate 1, on the premise of not influencing the effective space in the battery, the upper surface of the top cover plate 1 and the parts above the upper surface do not have conductive units such as pole columns, riveting blocks and the like, only the upper insulating element 6 with an insulating effect is arranged, the external height of the pole column protrusion and the battery top cover is eliminated, meanwhile, the conductive module is internally arranged in the top cover plate 1, the protruding height of the pole columns and the like on the top cover plate 1 is reduced under the condition of keeping the height of the original power battery, the height of the battery core shell can be correspondingly increased, the height space utilization rate of the battery module is improved, the capacity of the single battery is further improved, the structure is simplified, the number of accessories of the battery top cover plate is reduced, the processing procedures are reduced, the cost is reduced, meanwhile, the first conductive module 2 is electrically connected with the top cover plate 1 to ensure that the battery shell is positively charged, the structure of the upper insulator 6 may be circular, square, star-shaped or other irregular shapes, and is not limited herein.
In this embodiment, the first conductive module 2 includes a first conductive base block 21, a first welding plate 23 and a first injection-molded part 22, the first conductive base block 21 is disposed in the first injection-molded part 22 and electrically connected to the top cover plate 1 through the first injection-molded part 22, the first welding plate 23 is sleeved and fixed on the outer side of the first injection-molded part 22, one surface of the first welding plate 23 is fixed on the top cover plate 1, the other surface of the first welding plate 23 is matched with the first injection-molded part 22 to form a first groove 24, the second conductive module 3 includes a second conductive base block 31, second welding plate 33 and second injection molding 32, electrically conductive base block 31 of second set up in second injection molding 32 and through second injection molding 32 and top cap piece 1 electrical insulation, second welding plate 33 cover is established and is fixed in the second injection molding 32 outside, second welding plate 33 one side is fixed on top cap piece 1, the another side forms second recess 34 with the cooperation of second injection molding 32, lower insulating part 7 can be dismantled and fix on first recess 24 and second recess 34. The first conductive base block 21 is electrically connected with the top cover plate 1, so that the battery injection molding is positively charged, the lithium corrosion of the power battery to the battery injection molding is prevented, a plurality of protrusions can be arranged on the outer circumference of the first conductive base block 21, grooves matched with the protrusions are formed in the first injection molding 22, the first conductive base block 21 is fixed in the first injection molding 22 through the matching of the protrusions and the grooves, in another embodiment, a plurality of grooves can be formed in the outer side wall of the first conductive base block 21, correspondingly, corresponding protrusions are formed in the first injection molding 22, and the first conductive base block 21 is fixed in the first injection molding 22 through the matching of the grooves and the protrusions. The fixing mode of first welded plate 23 and first injection molding 22 can be according to the fixing mode of first electrically conductive base block 21 and first injection molding 22, can be equipped with a plurality of recesses on first welded plate 23, first injection molding 22 lateral wall is equipped with the arch that corresponds, or be equipped with a plurality of archs on first welded plate 23, first injection molding 22 lateral wall is equipped with the recess that corresponds, through protruding and recess cooperation, first welded plate 23 cover is established and is fixed on first injection molding 22 lateral wall, first welded plate 23 is fixed with top plate 1 through the welding simultaneously, first injection molding 22 adopts injection moulding, first electrically conductive base block 21 and the nested first injection molding 22 of first welded plate 23 during moulding plastics, ensure the intensity of first electrically conductive module 2, reduce material processing cost. The fixing and forming manners of the second conductive base block 31, the second injection-molded part 32, and the second welding plate 33 in the second conductive module 3 are the same as those of the first conductive module 2, which is not described herein, the first welding plate 23 and the second welding plate 33 may be irregular shapes such as a circle, a square, a star, and the like, and the material may be metal. In the present embodiment, it is preferable that the first welding plate 23 and the second welding plate 33 are both in the shape of a circular ring, and the circular ring shape is more convenient and faster to weld to the top cover plate 1 than other shapes.
In this embodiment, the first conductive base block 21 is an aluminum plate, and the second conductive base block 31 is a copper-aluminum composite plate (the copper-aluminum composite plate is a novel material in which a copper plate and an aluminum plate, that is, a plate coated with an aluminum plate on the copper plate, are welded together by cold rolling, hot rolling, explosive cladding, explosive rolling, etc., and cannot be separated). Further, in the embodiment, the copper layer thickness of the copper-aluminum composite board is 0.3-2.0 mm, the aluminum layer thickness is 0.5-20.0 mm, and preferably, the copper layer thickness of the copper-aluminum composite board is 0.6-1.5 mm, and the aluminum layer thickness is 1.0-5.0 mm.
In this embodiment, the material of the first injection molding part 22 is conductive PPS, the material of the second injection molding part 32 is insulating PPS, the PPS (polyphenylene sulfide) itself is insulating, the second conductive base block 31 is electrically insulated from the top cover plate 1 by the insulating material, and metal elements such as iron can be added to the PPS for modification to form the conductive PPS, so that the first conductive base block 21 is electrically connected with the top cover plate 1.
In this embodiment, the resistance value of the first injection molding part 22 is 0 to 10000mohm, preferably, the resistance value of the first injection molding part 22 is 500 to 2000mohm, the first conductive base block 21 is electrically connected with the top cover plate 1 through the first injection molding part 22, and the resistance value of the first injection molding part 22 is the resistance value between the first conductive base block 21 and the top cover plate 1, since the current can corrode the battery injection molding part and the top cover plate 1 in the charging and discharging process of the power battery, the large resistance with the resistance value of 500 to 2000mohm is adopted, the current of a loop can be reduced in the charging and discharging process of the power battery, so as to prevent the current from corroding the injection molding part and the top cover plate 1, and meanwhile, the large resistance can ensure that the short circuit can be controlled in a smaller range under the condition that the second conductive module 3 and the battery injection molding part are short-circuited, so that safety accidents are not caused.
In this embodiment, a plurality of through holes are formed in the lower insulating member 7 corresponding to the position below the explosion-proof valve 4, the lower insulating member 7 includes a first lower insulating member 71 and a second lower insulating member 72, a third groove 73 and a fourth groove 74 are formed in each of the first lower insulating member 71 and the second lower insulating member 72, the third groove 73 is matched with the first conductive module 2, the fourth groove 74 is matched with the second conductive module 3, a buckle is formed in the first lower insulating member 71, a clamping hole corresponding to the buckle is formed in each of the second lower insulating members 72, the first lower insulating member 71 and the second lower insulating member 72 are clamped and fixed, the lower insulating member 7 is fixed to the first conductive module 2 and the second conductive module 3, a plurality of through holes are formed in the lower insulating member 7 corresponding to the position below the explosion-proof valve 4 to transmit pressure generated in the power battery to the explosion-proof valve 4, so as to reduce potential safety hazards, and the electrolyte can enter the battery case through the through holes when the electrolyte injection hole 5 is injected, lower insulator 7 adopts knot formula joint structure, it is fixed with insulator 72 joint under the second through first insulator 71, on first conductive module 2 is connected to inboard wall joint in third recess 73, on second conductive module 3 is connected to inboard wall joint in fourth recess 74, thereby make insulator 7 fix on first conductive module 2 and second conductive module 3 down, insulator 7 structural strength under the reinforcing, it is simpler when assembling the battery top cap, conveniently make.
In this embodiment, the explosion-proof valve 4 includes the explosion-proof piece 41 and the protection film 42, is equipped with the explosion-proof hole on the top cover plate 1, and the explosion-proof piece 41 sets up in the explosion-proof hole, and the protection film 42 sets up on the explosion-proof piece 41 and sets up between top cover plate 1 and lower insulating part 7, and when the internal pressure of power battery risees the back, the electrolyte of vaporization can break through explosion-proof piece 41, in time releases the inside heat of power battery effectively, has avoided the battery to take place the condition of exploding because of the pressure is too big.
Referring to fig. 8, a power battery includes a battery case 10, a bare cell and an electrolyte contained in the battery case, and the above-mentioned battery top cap 11, where the battery top cap 11 is hermetically mounted on the battery case 10. Compared with the existing power battery, the assembly parts of the battery top cover 11 are reduced, the structure is simplified, the processing procedures are reduced, the cost is reduced, on the premise that the effective space in the battery is not influenced, the upper surface of the battery top cover 11 and the parts above the upper surface of the battery top cover 11 are not provided with conductive units such as poles and riveting blocks, only the upper insulating part 6 with an insulating effect is arranged, the external height of the pole protrusion and the battery top cover 11 is eliminated, meanwhile, the conductive module is internally arranged in the battery top cover 11, the height of the battery shell 10 can be correspondingly increased due to the fact that the protruding height of the poles and the like on the top cover plate 1 is reduced under the condition that the height of the original power battery is maintained, the height space utilization rate of the battery module is improved, the capacity of the single power battery is further improved, the structure of the conductive module is optimized, the strength of the conductive module is improved, the material processing cost is reduced, and the production cost of the power battery is further reduced.
The battery top cover and the power battery using the battery top cover have the beneficial effects that: under the prerequisite that does not influence battery inner space, eliminate the height that original utmost point post is outstanding with battery outside height for can increase electric core casing height, promote module space utilization, further promote the battery cell capacity, simplify the top cap structure simultaneously, the cost is reduced optimizes conductive module structure, promotes conductive module intensity, reduces material processing cost, lower insulating part adopts knot formula joint structure, insulating part structural strength under the reinforcing, the assembly is simple, manufacturability is strong.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. The utility model provides a battery top cap, its characterized in that, includes top cap piece, first conductive module, the conductive module of second, explosion-proof valve, goes up insulating part and lower insulating part, be equipped with on the top cap piece and annotate the liquid hole, explosion-proof valve sets up on the top cap piece, both ends are equipped with the mounting hole about on the top cap piece, it sets up to go up the insulating part in the mounting hole, first conductive module second conductive module install respectively in the mounting hole, first conductive module with the top cap piece electricity is connected, second conductive module with top cap piece electricity is insulating, first conductive module with be equipped with first sealing member between the top cap piece, second conductive module with be equipped with the second sealing member between the top cap piece, the insulating part can be dismantled down and fix first conductive module with on the conductive module of second, first conductive module with the conductive module of second passes through respectively first sealing member with the secret of second sealing member The first conductive module comprises a first conductive base block, a first welding plate and a first injection molding piece, the first conductive base block is arranged in the first injection molding piece and is electrically connected with the top cover piece through the first injection molding piece, the first welding plate is sleeved and fixed on the outer side of the first injection molding piece, one surface of the first welding plate is fixed on the top cover piece, the other surface of the first welding plate is matched with the first injection molding piece to form a first groove, the second conductive module comprises a second conductive base block, a second welding plate and a second injection molding piece, the second conductive base block is arranged in the second injection molding piece and is electrically insulated from the top cover piece through the second injection molding piece, the second welding plate is sleeved and fixed on the outer side of the second injection molding piece, and one surface of the second welding plate is fixed on the top cover piece, and the other surface of the lower insulating part is matched with the second injection molding part to form a second groove, and the lower insulating part is detachably fixed on the first groove and the second groove.
2. The battery top cap of claim 1, wherein the first weld plate and the second weld plate are each in the shape of a circular ring.
3. The battery top cap of claim 1, wherein the first conductive base block is an aluminum plate and the second conductive base block is a copper aluminum composite plate.
4. The battery top cap of claim 3, wherein the copper layer of the copper-aluminum composite plate is 0.3-2.0 mm thick, and the aluminum layer is 0.5-20.0 mm thick.
5. The battery top cap of claim 1, wherein the material of the first injection molded piece is electrically conductive PPS and the material of the second injection molded piece is insulative PPS.
6. The battery top cap of claim 1, wherein the first injection molded part has a resistance value of 0 to 10000 mohm.
7. The battery top cap of claim 1, wherein a plurality of through holes are formed in the lower insulating member corresponding to positions below the explosion-proof valve, the lower insulating member comprises a first lower insulating member and a second lower insulating member, third grooves and fourth grooves are formed in the first lower insulating member and the second lower insulating member, the third grooves are matched with the first conductive modules, the fourth grooves are matched with the second conductive modules, buckles are arranged on the first lower insulating member, clamping holes corresponding to the buckles are formed in the second lower insulating member, the first lower insulating member and the second lower insulating member are clamped and fixed, and the lower insulating member is fixed to the first conductive modules and the second conductive modules.
8. The battery top cap of claim 1, wherein the explosion-proof valve comprises an explosion-proof plate and a protective film, the top cap plate is provided with an explosion-proof hole, the explosion-proof plate is arranged in the explosion-proof hole, and the protective film is arranged on the explosion-proof plate and is arranged between the top cap plate and the lower insulating member.
9. A power battery, characterized by, including battery casing, the naked electric core and electrolyte that accept in the battery casing, and the battery top cap of any one of claims 1-8, the battery top cap is sealed and is installed on the battery casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428075.4A CN109546018B (en) | 2018-11-27 | 2018-11-27 | Battery top cover and power battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811428075.4A CN109546018B (en) | 2018-11-27 | 2018-11-27 | Battery top cover and power battery using same |
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| Publication Number | Publication Date |
|---|---|
| CN109546018A CN109546018A (en) | 2019-03-29 |
| CN109546018B true CN109546018B (en) | 2021-09-17 |
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| CN201811428075.4A Active CN109546018B (en) | 2018-11-27 | 2018-11-27 | Battery top cover and power battery using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048037A (en) * | 2019-04-15 | 2019-07-23 | 欣旺达电子股份有限公司 | A kind of no pole power battery top cover and power battery |
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