CN110854308A - Lithium ion battery top cover and lithium ion battery - Google Patents
Lithium ion battery top cover and lithium ion battery Download PDFInfo
- Publication number
- CN110854308A CN110854308A CN201911346498.6A CN201911346498A CN110854308A CN 110854308 A CN110854308 A CN 110854308A CN 201911346498 A CN201911346498 A CN 201911346498A CN 110854308 A CN110854308 A CN 110854308A
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- pole
- top cover
- boss
- hole
- ion battery
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 51
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000004033 plastic Substances 0.000 claims abstract description 61
- 229920003023 plastic Polymers 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 238000012545 processing Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
-
- 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)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a lithium ion battery top cover and a lithium ion battery, wherein the battery top cover comprises: pole, top cover plate and integrated lower plastic; the utmost point post contains: a first pole column and a second pole column; the top cover plate is provided with a mounting groove, and the bottom of the mounting groove is provided with a mounting through hole; the integrated lower plastic is arranged at the bottom of the top cover plate; the integrated lower plastic is provided with a pole column hole corresponding to the position of the mounting through hole; the first pole column comprises: the terminal post comprises a terminal post body and a first terminal post boss which is arranged at the bottom of the terminal post body and corresponds to the installation through hole; the second pole is provided with a second pole boss, and the middle part of the second pole boss is provided with a second pole boss hole; the second pole lug boss penetrates through the pole hole and then extends into the mounting through hole; the first pole column boss extends into the second pole column boss hole and is connected with the inner wall of the second pole column boss hole in a welding mode. The invention adopts a structure of assembly and welding, can ensure the strength and the sealing performance of the pole column, simplifies the pole column structure, lightens the weight of the top cover structure and reduces the cost of the top cover.
Description
Technical Field
The invention belongs to the technical field of new energy lithium ion batteries, and particularly relates to a lithium ion battery top cover and a lithium ion battery.
Background
The existing square lithium ion battery top cover structure is generally in a riveting and welding structure and an injection molding structure, and the structures have the defects that: riveting adds welded structure's first utmost point post and top cap piece of top cap, the sealing washer, riveting last welding is again assembled earlier such as plastic part, injection structure's top cap is first utmost point post and top cap piece, the sealing washer, plastic part is assembled earlier and is moulded plastics again, these top cap structures are complicated, the processing technology is complicated, the processing equipment is huge, cause these top cap part structures complicated, material cost and processing technology cost are high, and too much occupy the inside and outside space of square lithium ion battery, be unfavorable for square lithium ion battery energy density's promotion.
Disclosure of Invention
The invention aims to simplify the top cover structure of the square lithium ion battery and adopt the top cover structure assembled and welded, thereby not only ensuring the strength and the sealing property of a pole column of the top cover, but also simplifying the processing technology of the top cover, reducing the weight of the top cover structure, reducing the material cost and the processing technology cost of the top cover, reducing the space occupied by the top cover inside and outside the power battery, improving the utilization rate of the space inside and outside the power battery and improving the energy density of the power battery.
In order to achieve the above object, the present invention provides a lithium ion battery top cover comprising: pole, top cover plate and integrated lower plastic; the pole comprises: a first pole column and a second pole column; the top cover plate is provided with a mounting groove, and the bottom of the mounting groove is provided with a mounting through hole; the integrated lower plastic is arranged at the bottom of the top cover plate; the integrated lower plastic is provided with a pole column hole corresponding to the position of the mounting through hole; the first pole comprises: the terminal post comprises a terminal post body and a first terminal post boss which is arranged at the bottom of the terminal post body and corresponds to the installation through hole in position; the second pole is provided with a second pole boss, and the middle part of the second pole boss is provided with a second pole boss hole; the second pole column boss penetrates through the pole column hole and then extends into the mounting through hole; the first pole column boss extends into the second pole column boss hole and is connected with the inner wall of the second pole column boss hole in a welding mode.
Preferably, the welded connection is a laser welded connection.
Preferably, the bottom of the pole body is in contact connection with the upper wall of the second pole boss in a penetration laser welding mode.
Preferably, the top cover sheet is made of aluminum or aluminum alloy; the first pole column is a first positive pole column or a first negative pole column, and the second pole column is a second positive pole column or a second negative pole column; the first positive pole and the second positive pole are made of aluminum or aluminum alloy; the first negative pole column comprises a first negative pole column body, a first negative pole column boss and a second negative pole column boss, wherein the first negative pole column body is a first negative pole column body; the second negative pole column is made of a copper material or a copper alloy material.
Preferably, the battery top cap further comprises: plastic is coated; the upper plastic is arranged around the pole body and embedded in the mounting groove.
Preferably, the upper plastic is conductive and can be conducted with the top cover plate, and the resistance value is 0-10000 Ω; or the upper plastic is insulating, and the insulation resistance value of the upper plastic is more than 200M omega.
Preferably, the battery top cap further comprises: a seal ring; the sealing ring is arranged on the inner side of the mounting groove and is in contact with the first pole.
Preferably, the method for assembling the lithium ion battery top cover comprises the following steps:
(1) firstly, mounting the upper plastic on a mounting groove of a top cover plate, and placing a sealing ring on the inner side of the mounting groove;
(2) then, the first pole is placed in the mounting groove of the top cover plate and is in contact with the upper plastic and the sealing ring;
(3) then the second pole firstly passes through the pole hole of the integrated lower plastic and extends into the mounting through hole of the top cover plate, so that the boss of the first pole is contacted with the inner wall of the boss hole of the second pole;
(4) and finally, welding the first pole lug boss and the second pole lug boss together along the gap of the contact position by laser welding.
Preferably, the battery top cap further comprises: an explosion-proof valve assembly, said explosion-proof valve assembly comprising: the explosion-proof valve assembly comprises a protection patch and an explosion-proof sheet, wherein the explosion-proof sheet is welded on the top cover plate, and the protection patch is attached to the top cover plate so as to realize the sealing of the explosion-proof valve assembly.
The invention also provides a lithium ion battery, which comprises the lithium ion battery top cover.
Compared with the prior art, the invention has the following beneficial effects:
(1) the square lithium ion battery top cover structure adopts an assembly and welding structure, can ensure the strength and the sealing property of the pole, simplifies the top cover structure, simplifies the processing process flow and the processing equipment of the top cover, lightens the weight of the top cover structure, reduces the material cost and the processing of the top cover, reduces the occupation of the positive pole and the negative pole of the top cover in the internal and external space of the lithium ion battery, improves the utilization rate of the internal and external space of the lithium ion battery, and improves the energy density of the lithium ion battery.
(2) The pole assembly is assembled by combining a multi-component assembly and two-time welding process, the main welding mode is splicing welding, the pole can be fastened, the strength of the pole is enhanced, the overcurrent capacity is ensured, the sealing performance of the battery is ensured, and meanwhile penetration welding can be adopted for auxiliary reinforcement.
Drawings
Fig. 1 is an exploded view of the top cover of a square lithium ion battery according to the present invention.
Fig. 2 is a schematic cross-sectional view of the top cover of a square lithium ion battery of the present invention.
Fig. 3 is a schematic structural diagram of a positive post assembly of the square lithium ion battery top cover of the present invention.
Fig. 4 is a schematic structural diagram of a negative electrode pillar assembly of the square lithium ion battery top cover according to the present invention.
Fig. 5a to 5f are schematic structural diagrams of an embodiment of a first positive electrode post and a second positive electrode post of a square lithium ion battery top cover of the invention, wherein fig. 5a is a bottom view of the first positive electrode post, fig. 5b is a side sectional view of the first positive electrode post, fig. 5c is a top view of the first positive electrode post, fig. 5d is a bottom view of the second positive electrode post, fig. 5e is a side sectional view of the second positive electrode post, and fig. 5f is a top view of the second positive electrode post.
Fig. 6a to 6f are schematic diagrams of an embodiment of a first negative electrode tab and a second negative electrode tab of a square lithium ion battery top cover according to the present invention, where fig. 6a is a bottom view of the first negative electrode tab, fig. 6b is a side cross-sectional view of the first negative electrode tab, fig. 6c is a top view of the first negative electrode tab, fig. 6d is a bottom view of the second negative electrode tab, fig. 6e is a side cross-sectional view of the second negative electrode tab, and fig. 6f is a top view of the second negative electrode tab.
Fig. 7a to 7f are schematic diagrams of another embodiment of a first positive electrode post and a second positive electrode post of a square lithium ion battery top cover according to the present invention, fig. 7a is a bottom view of the first positive electrode post, fig. 7b is a side sectional view of the first positive electrode post, fig. 7c is a top view of the first positive electrode post, fig. 7d is a bottom view of the second positive electrode post, fig. 7e is a side sectional view of the second positive electrode post, and fig. 7f is a top view of the second positive electrode post.
Fig. 8a to 8f are schematic diagrams of another embodiment of the first negative electrode tab and the second negative electrode tab of the square lithium ion battery top cover of the present invention, wherein fig. 8a is a bottom view of the first negative electrode tab, fig. 8b is a side sectional view of the first negative electrode tab, fig. 8c is a top view of the first negative electrode tab, fig. 8d is a bottom view of the second negative electrode tab, fig. 8e is a side sectional view of the second negative electrode tab, and fig. 8f is a top view of the second negative electrode tab.
Fig. 9 is a schematic view of an integrated lower plastic structure of the top cover of a square lithium ion battery of the present invention.
The reference numbers illustrate:
1-positive pole column assembly; 11-a first positive post; 111-a first positive post recess; 112-a first positive post boss; 12-a second positive post; 121-a second positive post boss hole; 122 — a second positive post boss; 13-plastic on the positive electrode; 14-a sealing ring; 2-negative pole column assembly; 21 — a first negative post; 211-first negative post recess; 212 — a first negative post boss; 22 — a second negative post; 221-second negative pole post boss hole; 222 — a second negative post boss; 23-plastic on the negative electrode; 24-a sealing ring; 3-top cover sheet; 31-positive mounting groove; 32-a negative mounting groove; 4-explosion-proof valve assembly; 41-protective patch; 42-explosion-proof piece; 5-liquid injection hole; 6, integrally discharging plastic cement; 61-explosion-proof hole; 62-positive pole column hole; 63-negative pole column hole; and 64, a liquid injection hole.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
The lithium ion battery top cover of the invention comprises: pole, top cover plate and integrated lower plastic; the pole comprises: the first pole column and the second pole column. In the following embodiments, the first terminal post is a first positive terminal post or a first negative terminal post, and the second terminal post is a second positive terminal post or a second negative terminal post. The components of the battery anode and the components of the battery cathode adopt the same structure and connection mode.
Examples
As shown in fig. 1 and 2, the present invention provides a square lithium ion battery top cover, comprising: the lower plastic 6 is integrated by the positive pole column assembly 1, the negative pole column assembly 2, the top cover plate 3 and the explosion-proof valve assembly 4.
As shown in fig. 1 and 3, the positive electrode pillar assembly 1 includes: the positive post structure comprises a first positive post 11, a second positive post 12, positive upper plastic 13 and a sealing ring 14, wherein the first positive post 11 is provided with a first positive post groove 111 and a first positive post boss 112, and the second positive post 12 is provided with a second positive post boss hole 121 and a second positive post boss 122.
As shown in fig. 1 and 4, the negative electrode pillar assembly 2 includes: first negative pole post 21, second negative pole post 22, plastic 23 and sealing washer 24 on the negative pole, first negative pole post 21 is provided with first negative pole post recess 211 and first negative pole post boss 212, and second negative pole post 22 is provided with second negative pole post boss hole 221 and second negative pole post boss 222.
The first positive pole post 11 and the first negative pole post 21 are used for electrically connecting the lithium ion battery with the outside, the second positive pole post 12 is connected with the positive lug of the battery cell through an adapter sheet, and the second negative pole post 22 is connected with the negative lug of the battery cell through another adapter sheet, so that the electrical connection between the battery cell and the outside is realized.
As shown in fig. 1, 2 and 3, the top cover sheet is provided with a positive mounting groove 31 and a negative mounting groove 32, and the middle parts of the positive mounting groove 31 and the negative mounting groove 32 are provided with through holes.
As shown in fig. 1 and 9, the integrated lower plastic 6 is provided with an explosion-proof valve hole 61, a positive pole column hole 62, a negative pole column hole 63, and a liquid injection hole 64.
The plastic 13 on the positive pole is firstly installed in the positive pole installing groove 31 of the top cover plate 3, the sealing ring 14 is placed on the inner side of the positive pole installing groove 31 of the top cover plate 3, and then the first positive pole 11 is placed in the positive pole installing groove 31 of the top cover plate 3 and is in close contact with the plastic 13 on the positive pole and the sealing ring 14. And the second positive pole post 12 firstly passes through the integrated lower plastic 6 positive pole post hole 62 and then passes through the mounting through hole of the positive pole mounting groove 31 of the top cover plate 3, so that the first positive pole post boss 112 is in close contact with the second positive pole post boss hole 121. And finally, welding the two boss surfaces together along the gap by laser welding, thereby realizing the fixation and sealing of the anode column assembly 1.
Meanwhile, the plastic 23 on the negative pole post is firstly installed in the negative pole installation groove 32 of the top cover plate 3, the sealing ring 24 is placed on the inner side of the negative pole installation groove 32 of the top cover plate 3, and then the first negative pole post 21 is placed in the negative pole installation groove 32 of the top cover plate 3 and is in close contact with the plastic 23 on the negative pole and the sealing ring 24. The second negative pole post 12 is then inserted through the integrated lower plastic 6 negative pole post hole 63 and then through the mounting through hole of the negative pole mounting groove 32 of the top cover piece 3, so that the first negative pole post boss 212 is in close contact with the second negative pole post boss hole 221. And finally, welding the two boss surfaces together along the gap by laser welding. Thereby achieving the fixation and sealing of the negative electrode pillar assembly 2.
As shown in fig. 1 and 2, the explosion-proof valve assembly 4 includes: the explosion-proof valve comprises a protective patch 41 and an explosion-proof sheet 42, wherein the explosion-proof sheet 42 is assembled with the top cover plate 3 and welded and sealed, the protective patch 41 is attached to the top cover plate 3, and an explosion-proof valve hole 61 of the integrated lower plastic 6 covers the explosion-proof sheet 42, so that the explosion-proof valve component 4 is protected, fixed and sealed.
In some examples, the shape of the first positive post groove 111 and the shape of the first positive post boss 112 may be polygonal, circular, oval, racetrack, or other shapes that add rounded corners or deformations of keyways.
In some examples, the second positive post boss hole 121 may be polygonal, circular, oval, racetrack, or other shapes that add rounded corners or key slot deformations, as the shape of the first positive post boss 112.
In some examples, the outer shape of the first positive post 11 may be polygonal, circular, oval, racetrack shape, or other shapes that add rounded corners or deformations of keyways.
In some examples, the shape of the first negative electrode tab recess 211 and the shape of the first negative electrode tab projection 212 may be polygonal, circular, elliptical, racetrack, or other shapes that add rounded corners or deformations of keyways.
In some examples, second negative pole tab hole 221 may be polygonal, circular, elliptical, racetrack, or other shapes that add rounded corners or deformations of keyways, as well as first negative pole tab 212.
In some examples, the outer shape of the first negative electrode tab 21 may be polygonal, circular, oval, racetrack, or other shapes that add rounded corners or deformations of keyways.
As shown in fig. 5a to 5f, the first positive post 11 is rectangular in outer shape, the first positive post recess 111 and the first positive post boss 112 are circular in shape, and the second positive post boss hole 121 is circular in shape.
As shown in fig. 6a to 6f, first negative pole 21 is rectangular in outer shape, first negative pole recess 211 and first negative pole projection 212 are circular in shape, and second negative pole projection hole 221 is circular in shape.
As shown in fig. 7a to 7f, the outer shape of the first positive post 11 is rectangular, the shapes of the first positive post groove 111 and the first positive post boss 112 are circular shapes with rounded corners and keyways added, and the shape of the second positive post boss hole 121 is circular shapes with rounded corners and keyways added.
As shown in fig. 8a to 8f, the first negative pole 21 is rectangular in outer shape, the first negative pole groove 211 and the first negative pole projection 212 are circular to increase the fillet and key shape, and the second negative pole projection hole 221 is circular to increase the fillet and key shape.
The first positive post groove 111 facilitates post processing, and corresponds to the first positive post boss 112, one concave and one convex. The first negative post groove 211 works the same.
In addition, the battery top cover is also provided with a liquid injection hole 5, the liquid injection hole 5 is communicated with a liquid injection hole 64 of the integrated plastic 6, and the liquid injection hole 5 is sealed after liquid injection.
In this embodiment, positive post subassembly 1 and negative pole post subassembly 2 all adopt the multicomponent to assemble and add the technological combination equipment of twice welding, and its main welding mode of positive post subassembly 1 and negative pole post subassembly 2 is the splice welding, and its aim at fastening utmost point post strengthens utmost point post intensity, guarantees the ability of overflowing, guarantees the battery leakproofness, can adopt to pierce through to weld simultaneously and assist the reinforcement.
The first positive pole 11 and the second positive pole 12 may be made of aluminum or aluminum alloy, the plastic 13 on the positive pole may be made of plastic with good corrosion resistance and high temperature resistance, and the sealing ring 14 may be made of rubber with certain elasticity.
The plastic 13 on the positive pole can be conductive, the resistance value of the plastic is 0-10000 omega, and the plastic is in a conducting state with the top cover plate 3; the plastic 13 on the positive post can also be insulating, and the insulating resistance value of the plastic is more than 200M omega, and the plastic is insulated from the top cover plate 3. The top cover plate 3 is made of aluminum or aluminum alloy.
The first negative pole post 21 is made of copper-aluminum composite material, the upper portion is made of aluminum or aluminum alloy material, the lower portion is made of copper or copper alloy material, the second negative pole post 22 is made of copper or copper alloy material, the negative pole post is made of plastic 23 which is made of copper material or copper alloy material and has good corrosion resistance and high temperature resistance, and the sealing ring 24 is made of rubber material with certain elasticity.
The cathode pillar plastic 23 is an insulating material, the insulation resistance value of which is more than 200M omega, and the cathode pillar plastic is isolated and insulated from the top cover plate 3.
The appearance shapes of the second positive post 11 and the second negative post 21 may be the same or different, and the difference is that error prevention can be realized, and battery corrosion caused by reversely assembling the positive and negative posts in the process is avoided.
The protection patch 41 is made of PET or other plastic materials, and the explosion-proof sheet 42 is made of aluminum or aluminum alloy.
The liquid injection hole 64 is of a supporting through hole structure, and is beneficial to rapid infiltration in the battery after electrolyte injection.
The integrated lower plastic 6, the second positive post 12 and the second negative post 22 are respectively fixed on the surface B of the top cover plate 3 through the positive post hole and the negative post hole on the integrated lower plastic 6 in an assembling connection manner, wherein the integrated lower plastic 6 is made of PP or other plastic materials with good corrosion resistance and high temperature resistance.
In conclusion, the square lithium ion battery top cover structure disclosed by the invention adopts a structure of assembling and welding, so that the strength and the sealing property of a pole column of the square lithium ion battery top cover can be ensured, the pole column structure of the square lithium ion battery top cover can be simplified, the weight of the top cover structure is reduced, and the cost of the top cover is reduced; the first positive and negative pole posts and the positive and negative upper plastic parts are arranged in the positive and negative mounting grooves of the top cover plate, so that the occupation of the first positive and negative pole posts of the top cover into the internal and external space of the lithium ion battery can be reduced, the second positive and negative pole posts extend into the positive and negative mounting grooves of the top cover, the occupation of the second positive and negative poles into the internal and internal height space of the square lithium ion battery is reduced, the utilization rate of the internal and external space of the square lithium ion battery is.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. A lithium ion battery top cover, the battery top cover comprising: pole, top cover plate and integrated lower plastic; the pole comprises: a first pole column and a second pole column;
the top cover plate is provided with a mounting groove, and the bottom of the mounting groove is provided with a mounting through hole;
the integrated lower plastic is arranged at the bottom of the top cover plate; the integrated lower plastic is provided with a pole column hole corresponding to the position of the mounting through hole;
the first pole comprises: the terminal post comprises a terminal post body and a first terminal post boss which is arranged at the bottom of the terminal post body and corresponds to the installation through hole in position;
the second pole is provided with a second pole boss, and the middle part of the second pole boss is provided with a second pole boss hole;
the second pole column boss penetrates through the pole column hole and then extends into the mounting through hole; the first pole column boss extends into the second pole column boss hole and is connected with the inner wall of the second pole column boss hole in a welding mode.
2. The li-ion battery top cover of claim 1, wherein the welded connection is a laser welded connection.
3. The lithium ion battery top cover according to claim 1, wherein the bottom of the pole body is in contact connection with the upper wall of the second pole boss by penetration laser welding.
4. The lithium ion battery top cover of claim 1,
the top cover plate is made of aluminum or aluminum alloy;
the first pole column is a first positive pole column or a first negative pole column, and the second pole column is a second positive pole column or a second negative pole column; the first positive pole and the second positive pole are made of aluminum or aluminum alloy; the first negative pole column comprises a first negative pole column body, a first negative pole column boss and a second negative pole column boss, wherein the first negative pole column body is a first negative pole column body; the second negative pole column is made of a copper material or a copper alloy material.
5. The lithium ion battery top cover of claim 1, further comprising: plastic is coated; the upper plastic is arranged around the pole body and embedded in the mounting groove.
6. The lithium ion battery top cover according to claim 5, wherein the upper plastic is conductive and can be conducted with the top cover plate, and the resistance value is 0 to 10000 Ω; or the upper plastic is insulating, and the insulation resistance value of the upper plastic is more than 200M omega.
7. The lithium ion battery top cover of claim 6, further comprising: a seal ring; the sealing ring is arranged on the inner side of the mounting groove and is in contact with the first pole.
8. The li-ion battery top cover of claim 7, wherein the method of assembling the li-ion battery top cover comprises the steps of:
(1) firstly, mounting the upper plastic on a mounting groove of a top cover plate, and placing a sealing ring on the inner side of the mounting groove;
(2) then, the first pole is placed in the mounting groove of the top cover plate and is in contact with the upper plastic and the sealing ring;
(3) then the second pole firstly passes through the pole hole of the integrated lower plastic and extends into the mounting through hole of the top cover plate, so that the boss of the first pole is contacted with the inner wall of the boss hole of the second pole;
(4) and finally, welding the first pole lug boss and the second pole lug boss together along the gap of the contact position by laser welding.
9. The lithium ion battery top cover of claim 1, further comprising: an explosion-proof valve assembly, said explosion-proof valve assembly comprising: the explosion-proof valve assembly comprises a protection patch and an explosion-proof sheet, wherein the explosion-proof sheet is welded on the top cover plate, and the protection patch is attached to the top cover plate so as to realize the sealing of the explosion-proof valve assembly.
10. A lithium ion battery comprising the lithium ion battery top cover of any of claims 1-9.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346498.6A CN110854308A (en) | 2019-12-24 | 2019-12-24 | Lithium ion battery top cover and lithium ion battery |
| PCT/CN2020/139014 WO2021129739A1 (en) | 2019-12-24 | 2020-12-24 | Top cover for power battery, and power battery |
| KR1020227023214A KR20220119635A (en) | 2019-12-24 | 2020-12-24 | Power battery top cover and power battery |
| JP2022508893A JP7481431B2 (en) | 2019-12-24 | 2020-12-24 | Power battery top cover and power battery |
| US17/788,564 US20220359937A1 (en) | 2019-12-24 | 2020-12-24 | Top Cover for Power Battery, and Power Battery |
| EP20904663.0A EP4084195A1 (en) | 2019-12-24 | 2020-12-24 | Top cover for power battery, and power battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911346498.6A CN110854308A (en) | 2019-12-24 | 2019-12-24 | Lithium ion battery top cover and lithium ion battery |
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| CN110854308A true CN110854308A (en) | 2020-02-28 |
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| CN201911346498.6A Pending CN110854308A (en) | 2019-12-24 | 2019-12-24 | Lithium ion battery top cover and lithium ion battery |
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| CN111244340A (en) * | 2020-03-10 | 2020-06-05 | 江苏塔菲尔新能源科技股份有限公司 | Battery top cover structure and assembly method |
| CN111785865A (en) * | 2020-07-02 | 2020-10-16 | 中兴高能技术有限责任公司 | Top cover plate and top cover of lithium battery, lithium battery and assembling method |
| WO2021129739A1 (en) * | 2019-12-24 | 2021-07-01 | 瑞浦能源有限公司 | Top cover for power battery, and power battery |
| CN113363680A (en) * | 2021-06-11 | 2021-09-07 | 刘义 | Positive pole subassembly, negative pole subassembly and battery cover board subassembly |
| CN113823868A (en) * | 2021-10-18 | 2021-12-21 | 厦门海辰新能源科技有限公司 | Top cover assembly of battery and battery |
| CN115117569A (en) * | 2022-07-25 | 2022-09-27 | 实联长宜淮安科技有限公司 | Square aluminum-shell lithium ion power battery with high energy density |
| WO2023036291A1 (en) * | 2021-09-09 | 2023-03-16 | 江苏正力新能电池技术有限公司 | Composite pole, top cover, and battery |
| CN115995594A (en) * | 2022-12-28 | 2023-04-21 | 三一红象电池有限公司 | Battery cell cover plate assembly method, battery cell cover plate and battery |
| CN116365124A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| WO2024060528A1 (en) * | 2022-09-20 | 2024-03-28 | 湖北亿纬动力有限公司 | Top cover assembly and battery |
| CN117996309A (en) * | 2024-03-29 | 2024-05-07 | 蜂巢能源科技股份有限公司 | Battery cover plate assembly, battery and power device |
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| WO2021129739A1 (en) * | 2019-12-24 | 2021-07-01 | 瑞浦能源有限公司 | Top cover for power battery, and power battery |
| WO2021179525A1 (en) * | 2020-03-10 | 2021-09-16 | 江苏塔菲尔新能源科技股份有限公司 | Battery top cover structure and assembly method |
| CN111244340A (en) * | 2020-03-10 | 2020-06-05 | 江苏塔菲尔新能源科技股份有限公司 | Battery top cover structure and assembly method |
| CN111785865A (en) * | 2020-07-02 | 2020-10-16 | 中兴高能技术有限责任公司 | Top cover plate and top cover of lithium battery, lithium battery and assembling method |
| CN113363680A (en) * | 2021-06-11 | 2021-09-07 | 刘义 | Positive pole subassembly, negative pole subassembly and battery cover board subassembly |
| WO2023036291A1 (en) * | 2021-09-09 | 2023-03-16 | 江苏正力新能电池技术有限公司 | Composite pole, top cover, and battery |
| CN113823868A (en) * | 2021-10-18 | 2021-12-21 | 厦门海辰新能源科技有限公司 | Top cover assembly of battery and battery |
| CN115117569A (en) * | 2022-07-25 | 2022-09-27 | 实联长宜淮安科技有限公司 | Square aluminum-shell lithium ion power battery with high energy density |
| WO2024060528A1 (en) * | 2022-09-20 | 2024-03-28 | 湖北亿纬动力有限公司 | Top cover assembly and battery |
| CN115995594A (en) * | 2022-12-28 | 2023-04-21 | 三一红象电池有限公司 | Battery cell cover plate assembly method, battery cell cover plate and battery |
| CN115995594B (en) * | 2022-12-28 | 2024-03-12 | 三一红象电池有限公司 | Battery cell cover plate assembly method, battery cell cover plate and battery |
| CN116365124A (en) * | 2023-05-31 | 2023-06-30 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116365124B (en) * | 2023-05-31 | 2023-08-11 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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Address after: Room A205, building C, No. 205, Binhai 6th Road, Jinhai Second Road, Airport New District, Longwan District, Wenzhou City, Zhejiang Province 325024 Applicant after: REPT BATTERO Energy Co., Ltd. Applicant after: SHANGHAI RUIPU ENERGY Co.,Ltd. Address before: Room A205, building C, No. 205, Binhai 6th Road, Jinhai Second Road, Airport New District, Longwan District, Wenzhou City, Zhejiang Province 325024 Applicant before: RUIPU ENERGY Co.,Ltd. Applicant before: SHANGHAI RUIPU ENERGY Co.,Ltd. |
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