CN109088012A - A kind of high-power lithium ion circular battery lid - Google Patents
A kind of high-power lithium ion circular battery lid Download PDFInfo
- Publication number
- CN109088012A CN109088012A CN201810774462.7A CN201810774462A CN109088012A CN 109088012 A CN109088012 A CN 109088012A CN 201810774462 A CN201810774462 A CN 201810774462A CN 109088012 A CN109088012 A CN 109088012A
- Authority
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- China
- Prior art keywords
- relief valve
- top cover
- battery
- cut
- orifice plate
- Prior art date
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- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000007373 indentation Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 238000007747 plating Methods 0.000 claims description 6
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 3
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 description 13
- 238000013461 design Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 238000010998 test method Methods 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
- 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
- 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
-
- 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
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/531—Electrode connections inside a battery 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
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a kind of high-power lithium ion circular battery lids, including hollow sealing ring (2), are embedded with top cover (1) on the inside of the sealing ring (2)；The bottom surface of the top cover (1) is provided with the relief valve (3) of cross direction profiles；The edge of the relief valve (3) is located at the position on the inside of the sealing ring (2) between the edge of the top cover (1)；The orifice plate (6) of a cross direction profiles is provided with immediately below the relief valve (3).A kind of high-power lithium ion circular battery lid disclosed by the invention, the internal resistance that battery cover has can be effectively reduced in it, and significantly reduce its raising with electrical current and the temperature that is promoted, to guarantee the security performance of circular battery, the market application prospect for being conducive to improve cell production companies product, is of great practical significance.
Description
Technical field
The present invention relates to cell manufacturing techniques fields, more particularly to a kind of high-power lithium ion circular battery lid.
Background technique
In recent years, as problem of environmental pollution and energy problem are on the rise, new energy field is increasingly by people's
Pay attention to, especially new-energy automobile is rapidly developed, and circular battery is in the most widely used battery in new-energy automobile field
Type.With the fast development in the fields such as high performance electric vehicle, electric tool and automobile start and stop function, to the function of circular battery
Rate performance proposes higher performance.The charging and discharging currents of conventional energy type circular battery are generally 0.5~10A, and power-type
Circular battery charging and discharging currents are generally in 10~100A.With the increase of circular battery power-performance, to circular battery battery cover
Heat production performance more stringent requirements are proposed, the circular battery lid of traditional structure can no longer meet battery performance demand and safety
Performance.
Circular battery is generally made of battery pole group, battery cover and battery case.Wherein battery cover is very important component,
It should cooperate with battery case and play sealing effect, be provided simultaneously under abnormal conditions again and power off and discharge internal pressure function.
For traditional circular battery, due to its structure and material problem, cause in the battery high current course of work,
The battery cover having there are internal resistances it is high, battery cover quantity of heat production is big, temperature is high the problems such as, when battery cover when the temperature is excessively high, pad
Circle softens at high temperature, loses the supporting role to orifice plate, leads to cut-off structure structural failure, seriously affects the peace of battery
Quan Xing.
Therefore, the internal resistance that battery cover has can be effectively reduced there is an urgent need to develop a kind of technology out at present, and significant
The temperature for reducing its raising with electrical current and being promoted, to guarantee the security performance of circular battery.
Summary of the invention
In view of this, can be effectively reduced the object of the present invention is to provide a kind of high-power lithium ion circular battery lid
The internal resistance that battery cover has, and significantly reduce its raising with electrical current and the temperature that is promoted, to guarantee circular battery
Security performance, be conducive to improve cell production companies product market application prospect, be of great practical significance.
For this purpose, the present invention provides a kind of high-power lithium ion circular battery lids, and including hollow sealing ring, the sealing
Top cover is embedded on the inside of circle；
The bottom surface of the top cover is provided with the relief valve of cross direction profiles；
The edge of the relief valve is located at the position on the inside of the sealing ring between the edge of the top cover；
The orifice plate of a cross direction profiles is provided with immediately below the relief valve.
Wherein, the washer of annular is provided between the edge of the orifice plate and the bottom surface of the relief valve.
Wherein, the middle part of the relief valve and the middle part of orifice plate are attached by Laser Welding.
Wherein in the bottom surface of the relief valve is provided with the relief valve indentation of annular spread.
Wherein, relief valve bottom surface setting relief valve indentation is inclined " V " shape, the notch that Open Side Down；
The lateral surface for the separate top cap central that the notch has is parallel to the axis direction of top cover, and the notch has
For some close to the medial surface of top cap central, the angular range with the axis direction of top cover is 30 °~60 °.
Wherein, the bottom surface of the cut-off structure is provided with the cut-off structure indentation of annular spread.
Wherein, cut-off structure bottom surface setting cut-off structure indentation is inclined " V " shape, the notch that Open Side Down；
The lateral surface for the separate top cap central that the notch has is parallel to the axis direction of top cover, and the notch has
For some close to the medial surface of top cap central, the angular range with the axis direction of top cover is 30 °~60 °.
Wherein, the top cover uses copper nickel plating or iron nickel plating material.
Wherein, the material of the orifice plate and the material of relief valve are identical, and the thickness of orifice plate is greater than the thickness of relief valve.
Wherein, the middle part of the orifice plate has the annulus that raises upward, the annulus be in contact with the lower surface of relief valve and
Form conductive anchor ring.
By the above technical solution provided by the invention as it can be seen that compared with prior art, the present invention provides a kind of Gao Gong
Rate lithium ion circular battery lid, can be effectively reduced the internal resistance that battery cover has, and significantly reduce it with electrical current
The temperature for increasing and being promoted is conducive to the market for improving cell production companies product to guarantee the security performance of circular battery
Application prospect is of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of high-power lithium ion circular battery lid provided by the invention；
Fig. 2 is a kind of the schematic diagram of the section structure of high-power lithium ion circular battery lid provided by the invention；
Fig. 3 is the cut-off structure surface temperature of high-power lithium ion circular battery lid provided by the invention Yu common batteries lid
Promotion situation contrast schematic diagram when electrical current increases, electrical current 30A, conduction time 60s.
Fig. 4 is the cut-off structure surface temperature of high-power lithium ion circular battery lid provided by the invention Yu common batteries lid
Promotion situation contrast schematic diagram when electrical current increases, electrical current 80A, conduction time 15s.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Invention is described in further detail.
Referring to Fig. 1, Fig. 2, the present invention provides a kind of high-power lithium ion circular battery lid, including hollow sealing ring 2,
The inside of the sealing ring 2 is embedded with top cover 1；
The bottom surface of the top cover 1 is provided with the relief valve 3 of cross direction profiles；
The edge of the relief valve 3 is located at the position between 2 inside of sealing ring and the edge of the top cover 1
It sets；
The underface of the relief valve 3 is provided with the orifice plate 6 of a cross direction profiles.
In specific implementation, the washer of annular is provided between the edge of the orifice plate 6 and the bottom surface of the relief valve 3
10。
In specific implementation, the middle part of the relief valve 3 and the middle part of orifice plate 6 are attached by Laser Welding.
In specific implementation, the transverse center position of the relief valve 3 and the transverse center position aperture of the orifice plate 6 and
It is provided with a cut-off structure 5.
In the present invention, in specific implementation, the bottom surface of the relief valve 3 is provided with the relief valve indentation 7 of annular spread.
In specific implementation, the relief valve indentation 7 of 3 bottom surface of relief valve setting be inclined " V " shape, Open Side Down lacks
Mouthful, specifically: the lateral surface at 1 center of separate top cover that the notch has is parallel to the axis direction of top cover 1, and described scarce
The medial surface at 1 center of close top cover that mouth has, the angular range with the axis direction of top cover 1 are 30 °~60 °.
In the present invention, in specific implementation, the bottom surface of the cut-off structure 5 is provided with the cut-off structure indentation of annular spread
8。
In specific implementation, the cut-off structure indentation 8 of 5 bottom surface of cut-off structure setting be inclined " V " shape, Open Side Down
Notch, specifically: the lateral surface at 1 center of separate top cover that the notch has is parallel to the axis direction of top cover 1, and described
The medial surface at 1 center of close top cover that notch has, the angular range with the axis direction of top cover 1 are 30 °~60 °.
In the present invention, in specific implementation, the top cover 1 using copper nickel plating (0.4~0.6mm is thick) or iron nickel plating (0.6~
0.8mm is thick) material.
In the present invention, in specific implementation, the middle part of the orifice plate 6 has an annulus 61 to raise upward, the annulus with let out
The lower surface of pressure valve 3 is in contact and forms conductive anchor ring 4.
It should be noted that the area of the conduction anchor ring 4, the size for the battery operating current that can according to need is adjusted
It is whole.Area is bigger, by battery operating current it is bigger.
In the present invention, in specific implementation, there is center connection welding 9 on the cut-off structure 5, is used for cut-off structure
5 are connected with the relief valve 3 and the orifice plate 6.
In specific implementation, the bottom surface of the cut-off structure 5 is connected with inside battery space to be mounted is needed.
In the present invention, the orifice plate 6 is a round laminated structure, is along the circumferential direction dispersed on the orifice plate 6
Multiple circular holes or looping pit.The main function of the orifice plate 6 includes: first is that cut-off structure 5 is used to support, second is that sending out as battery
When raw security risk, the air flue of ejection of the inside battery gas in quick-fried spray.
It should be noted that the material of the orifice plate 6 is identical as the material of relief valve 3, it can be existing aluminium alloy
Material, the thickness of orifice plate 6 are greater than the thickness of relief valve 3.When battery overcharges problem, lead to the air pressure liter of inside battery
Height, and then relief valve 3 is caused to arch upward upwards.Orifice plate 6 is since thickness is larger, and deformation is smaller, thus will be so that relief valve 3 and orifice plate
The cut-off structure 5 of 6 junction bears the effect of pulling force, when air pressure is increased to the power-off pressure that cut-off structure 5 has itself,
Cut-off structure 5 is broken under the action of relief valve 3 and orifice plate 6, to realize the effect of power-off protection.Simultaneously as letting out
The separation of pressure valve 3 and orifice plate 6 so that the contact lost (conductive anchor ring 4 is only Mechanical Contact) of conductive anchor ring 4, orifice plate 6 with let out
After pressure valve 3 separates, conductive anchor ring 4 can also be separated, and therefore, after cut-off structure 5 starts, conductive anchor ring 4 fails simultaneously, thus, it is real
Existing power-off protection.
In addition, the air pressure of inside battery increases rapidly when quick-fried spray occurs for battery, cut-off structure 5 starts, and battery occurs disconnected
Electricity, if air pressure continues to increase, relief valve 3 is opened.Multiple circular holes or looping pit on inside battery gas through holes plate 6, then through letting out
It is sprayed in the opening of pressure valve 3.Therefore, the area and quantity of the circular hole on orifice plate 6 or looping pit, capacity and battery material with battery
Expect that chemical system is related.
In the present invention, the main body of the cut-off structure 5 is one piece of conductive aluminium flake, and bottom surface is provided with the disconnected of annular spread
Electric structure indentation 8, the center between the cut-off structure 5 and the relief valve 3 and the orifice plate 6 with annular spread connect weldering
Point 9.
For the cut-off structure 5, main function are as follows: when battery overcharges, the air pressure of inside battery is increased, when
When air pressure is increased to power-off protection pressure, cut-off structure starting, inside battery circuitry cuts, to play a protective role.Specifically
Working principle are as follows: when inside battery air pressure increases, relief valve 3 arches upward upwards, and orifice plate 6 plays a supportive role, so that power-off
Structure 5 bears pulling force effect.When air pressure is increased to the power-off pressure that cut-off structure 5 has, cut-off structure 5 is in 3 He of relief valve
It is broken under the action of orifice plate 6, meanwhile, conductive anchor ring also separates, to realize the effect of power-off protection.
For cut-off structure 5, protective effect is to reduce by material thickness caused by cut-off structure indentation 8, and then lead
The reduction of breaking strength is caused, so that being broken first from cut-off structure indentation 8 when air pressure increases.Therefore, cut-off structure indentation 8
Size, the design of shape have depended on the size of power-off pressure that cut-off structure 5 has, being able to bear.
It should also be noted that, for circular battery, anode is welded on the surface of orifice plate 6, external circuit and battery cover
The connection of 1 outer surface of top cover, therefore, electric current by orifice plate 6, conductive anchor ring 4 and cut-off structure CID 5, relief valve 3 and top cover 1 with
External circuit conducting.Therefore, when cut-off structure 5 is broken under the action of relief valve 3 and orifice plate 6, due to conductive at this time
Anchor ring 4 also separates, and therefore, the effect of power-off protection can be realized to battery.Wherein, the transmission path of electric current is string in battery
The path of connection, as long as one of them are broken, battery circuit is disconnected.Since cut-off structure intensity is minimum, so, cut-off structure
It is broken first, to realize protection.
In the present invention, after cut-off structure starts, orifice plate and relief valve will disconnect, separate.Simultaneously as conductive anchor ring
It is that the annulus of orifice plate protrusion and relief valve contact to be formed, therefore, after cut-off structure separation, conductive anchor ring also will disconnect separation, from
And disconnect the circuit in battery.
In the present invention, conductive anchor ring 4 refers to the annular contact surface between orifice plate 6 and relief valve 3, and main function is:
Cell cover internal resistance is reduced, the current temperature rise (temperature that current temperature rise is promoted with the raising of electrical current of battery cover is reduced
Degree).Its working principle is that: for circular battery, anode is welded on the surface of orifice plate 6, outside the top cover 1 of external circuit and battery cover
Surface connection, therefore, electric current is by orifice plate 6, conductive anchor ring 4 and cut-off structure CID 5, relief valve 3 and top cover 1 and external circuit
Conducting.Wherein, since the contact area of conductive anchor ring 4 is larger, and the path that electric current passes through is most short, therefore, the internal resistance of battery cover
It significantly reduces.Further, since place's internal resistance of conductive anchor ring 4 is significantly less than the internal resistance of cut-off structure 5, electric current will be first from conducting ring
Face 4 passes through, and only seldom one part of current passes through cut-off structure CID 5.Therefore, conductive anchor ring 4 can reduce internal resistance, and significant
Reduce the current temperature rise of cut-off structure 5.
It should be noted that for the present invention, by the working principle of cut-off structure 5 it is found that the security function of cut-off structure 5
It is is realized by the thickness for reducing material, therefore, this structure, which designs, necessarily leads to that there are a weak links: indentation.For
Solution this contradiction.In periphery design one conductive anchor ring 4 of cut-off structure 5, the effect of shunting can be effectively played, thus
Internal resistance and the current temperature rise of battery cover is effectively reduced.
The design of conductive anchor ring 4, can reduce cell cover internal resistance in terms of two.First, contact area is increased, it is equivalent
Increase in conductor cross sectional area, according to Ohm's law it is found that sectional area increases, internal resistance is reduced；Second, conductive anchor ring 4 is located at power-off
The periphery of structure 5, junction of the conductive anchor ring 5 apart from relief valve 3 and top cover 1 are closer, it is meant that and the path that electric current passes through shortens,
The length for being equal to conductor reduces, and according to Ohm's law it is found that length reduces, internal resistance is reduced.In conclusion split-type design exists
Under the premise of not influencing power-off protection, the internal resistance of high-power lithium ion circular battery lid can be effectively reduced, significantly reduce its electricity
Flow temperature rise.
Compared with prior art, high-power lithium ion circular battery lid provided by the invention, by by security function
It is separately designed with conducting function, cut-off structure 5 mainly realizes security function, and conductive anchor ring 4 mainly plays conducting function.This fission
Formula designs the internal resistance that high-power lithium ion circular battery lid of the present invention can be effectively reduced, and significantly reduces its current temperature rise.
Meanwhile cut-off structure and relief valve are all made of inclined " V " shape indentation can be effectively improved stress, improve security performance.
In order to technical solution of the present invention is more clearly understood, it is illustrated combined with specific embodiments below.
Embodiment 1.
Cell cover internal resistance is tested using AC internal Resistance tester and special fixture.Wherein, fixture probe top has
Embossing, it can be ensured that probe contacts well with battery cover.Positive and negative anodes probe simulates actual condition with battery cover contact position, specifically
, anode probe and battery cover top cover central contact, cathode are popped one's head in and are contacted at battery key drop radius 1/2.10 are tested altogether
High-power battery lid, by test, in these battery covers, internal resistance is up to 0.36mohm (milliohm), minimum 0.32mohm,
Average internal resistance is 0.34mohm.
Embodiment 2.
Tab (for connecting test equipment) is respectively welded in battery cover surfaces externally and internally, is set using A Bin Arbin battery testing
It is standby, to test the voltage change at battery cover both ends under different electric currents.Wherein, the orifice plate side welding 0.15mm thickness of battery cover, 5mm
Wide aluminium pole ears, welding manner are Laser Welding；Weld the copper polar ear of 0.16mm thickness, 4mm wide in battery cover top cover side.Test electric current
For 50A, current duration is 1 second, and 10 samples are tested 1 time respectively.Using Ou Mo law, battery cover can be calculated
Internal resistance.Test result shows that high-power battery lid internal resistance is up to 0.35mohm, minimum 0.33mohm, average internal resistance
0.34mohm。
Embodiment 3.
Using identical polar ear size and welding manner in embodiment 2, using A Bin Arbin battery test apparatus, to survey
Try the temperature rise of high-power battery lid cut-off structure under different electric currents.The temperature rise of cut-off structure under different electric currents is tested respectively.Test
The results show that 30A energization 60s, cut-off structure temperature rise is 16.6 DEG C, 80A energization 15s, and cut-off structure temperature rise is 67.3 DEG C.
Comparative example 1.
Using test method in embodiment 2, contrast test battery cover of the present invention is identical as size material but does not lead
The battery cover of electric annuli arrangement, test result show that cell cover internal resistance of the present invention is substantially reduced, and internal resistance maximum reduces
15%.Specifically, conductive toroidal design contact area is different, it is different that internal resistance reduces amplitude.
Comparative example 2.
It is identical with size material but without the battery cover of conductive annuli arrangement compared with, battery cover cut-off structure of the present invention
Surface temperature rise significantly reduces.Under room temperature environment, battery cover 30A energization 60s of the present invention, battery cover cut-off structure temperature rise is
16.6 DEG C, 16.6% is reduced than (19.9 DEG C) of the temperature rise of conventional batteries lid cut-off structure, test result is shown in attached drawing 3；It is of the present invention
Battery cover 80A energization 15s, battery cover cut-off structure temperature rise are 67.3 DEG C, and test result is more disconnected than conventional batteries lid referring to attached drawing 4
(91.2 DEG C) of electric structure temperature rise reduce by 26.2%.Test result shows the design of conductive anchor ring of the invention, can significantly reduce disconnected
The temperature rise of electric structure.
In conclusion compared with prior art, a kind of high-power lithium ion circular battery lid provided by the invention can
The internal resistance that battery cover has is effectively reduced, and its raising with electrical current is significantly reduced and the temperature that is promoted, to protect
The security performance for demonstrate,proving circular battery is conducive to the market application prospect for improving cell production companies product, has great production
Practice significance.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of high-power lithium ion circular battery lid, which is characterized in that including hollow sealing ring (2), the sealing ring (2)
Inside be embedded with top cover (1)；
The bottom surface of the top cover (1) is provided with the relief valve (3) of cross direction profiles；
The edge of the relief valve (3) is located on the inside of the sealing ring (2) between the edge of the top cover (1)
Position；
The orifice plate (6) of a cross direction profiles is provided with immediately below the relief valve (3).
2. battery cover as described in claim 1, which is characterized in that the edge and the relief valve (3) of the orifice plate (6)
Bottom surface between be provided with annular washer (10).
3. battery cover as described in claim 1, which is characterized in that the middle part of the relief valve (3) and the middle part of orifice plate (6) are logical
Laser Welding is crossed to be attached.
4. battery cover as described in claim 1, which is characterized in that the bottom surface of the relief valve (3) is provided with annular spread
Relief valve indentation (7).
5. battery cover as claimed in claim 4, which is characterized in that the relief valve indentation (7) of relief valve (3) the bottom surface setting
For inclined " V " shape, the notch that Open Side Down；
The lateral surface at separate top cover (1) center that the notch has, is parallel to the axis direction of top cover (1), and the notch
The medial surface at close top cover (1) center having, the angular range with the axis direction of top cover (1) are 30 °~60 °.
6. battery cover as described in claim 1, which is characterized in that the bottom surface of the cut-off structure (5) is provided with annular spread
Cut-off structure indentation (8).
7. battery cover as claimed in claim 6, which is characterized in that the cut-off structure of cut-off structure (5) the bottom surface setting is carved
Notch that trace (8) is inclined " V " shape, that Open Side Down；
The lateral surface at separate top cover (1) center that the notch has, is parallel to the axis direction of top cover (1), and the notch
The medial surface at close top cover (1) center having, the angular range with the axis direction of top cover (1) are 30 °~60 °.
8. battery cover as described in claim 1, which is characterized in that the top cover (1) uses copper nickel plating or iron nickel plating material.
9. battery cover as described in claim 1, which is characterized in that the material and the material phase of relief valve (3) of the orifice plate (6)
Together, the thickness of orifice plate (6) is greater than the thickness of relief valve (3).
10. battery cover as claimed in any one of claims 1-9 wherein, which is characterized in that the middle part of the orifice plate (6) have to
The annulus (61) of upper protrusion, the annulus are in contact with the lower surface of relief valve (3) and form conductive anchor ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810774462.7A CN109088012A (en) | 2018-07-16 | 2018-07-16 | A kind of high-power lithium ion circular battery lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810774462.7A CN109088012A (en) | 2018-07-16 | 2018-07-16 | A kind of high-power lithium ion circular battery lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109088012A true CN109088012A (en) | 2018-12-25 |
Family
ID=64837912
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810774462.7A Pending CN109088012A (en) | 2018-07-16 | 2018-07-16 | A kind of high-power lithium ion circular battery lid |
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| Country | Link |
|---|---|
| CN (1) | CN109088012A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109713173A (en) * | 2018-12-06 | 2019-05-03 | 深圳市量能科技有限公司 | A kind of anode nut cap, preparation method and battery |
| CN110098364A (en) * | 2019-05-09 | 2019-08-06 | 力神电池（苏州）有限公司 | A kind of high security cylindrical lithium ion battery |
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| KR20160040115A (en) * | 2014-10-02 | 2016-04-12 | 주식회사 엘지화학 | Cap assembly and secondary battery including the same |
| CN107492604A (en) * | 2017-08-02 | 2017-12-19 | 江苏镭腾能源科技有限公司 | A kind of dynamic lithium battery explosion-proof cap component |
| CN108183183A (en) * | 2018-01-19 | 2018-06-19 | 东莞市奕东电子有限公司 | Battery cap structure, battery cell and the battery pack of a kind of car lithium battery |
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| CN204946948U (en) * | 2015-07-24 | 2016-01-06 | 浙江天能能源科技有限公司 | A kind of lithium ion battery safe cap with fuse |
| CN107492604A (en) * | 2017-08-02 | 2017-12-19 | 江苏镭腾能源科技有限公司 | A kind of dynamic lithium battery explosion-proof cap component |
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| CN109713173A (en) * | 2018-12-06 | 2019-05-03 | 深圳市量能科技有限公司 | A kind of anode nut cap, preparation method and battery |
| CN110098364A (en) * | 2019-05-09 | 2019-08-06 | 力神电池（苏州）有限公司 | A kind of high security cylindrical lithium ion battery |
| CN110098364B (en) * | 2019-05-09 | 2024-05-14 | 力神电池（苏州）有限公司 | High-safety cylindrical lithium ion battery |
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Application publication date: 20181225 |