CN107346808A - A kind of automobile starting/stopping system lithium ion battery - Google Patents
A kind of automobile starting/stopping system lithium ion battery Download PDFInfo
- Publication number
- CN107346808A CN107346808A CN201710597797.1A CN201710597797A CN107346808A CN 107346808 A CN107346808 A CN 107346808A CN 201710597797 A CN201710597797 A CN 201710597797A CN 107346808 A CN107346808 A CN 107346808A
- Authority
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- China
- Prior art keywords
- explosion
- proof cap
- curved slab
- lithium ion
- failure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 26
- 229910021384 soft carbon Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000013329 compounding Methods 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 241000469816 Varus Species 0.000 claims abstract description 4
- 239000011889 copper foil Substances 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 7
- 229910000679 solder Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000005087 graphitization Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910011490 LiCx Inorganic materials 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
- H01M50/50—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
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/20—Pressure-sensitive devices
-
- 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)
- Composite Materials (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention discloses a kind of automobile starting/stopping system lithium ion battery, including explosion-proof cap, failure of current device, shell and battery core, the shell coats whole battery core, and the upper end varus of shell compresses the outer rim upper end of explosion-proof cap, the failure of current device is welded by curved slab and surface plate, the outer rim upper surface of the curved slab is bonded with the outer rim lower surface of explosion-proof cap, and the outer edge of curved slab and the outer edge full weld of explosion-proof cap connect, the lower end weldering of the surface plate and curved slab connects, the upper end of surface plate and battery core connects, the battery core is by positive pole, barrier film, the structure that negative pole helically coiling forms, described negative pole is to be coated on copper foil to form by the negative material formed by soft carbon and carbonaceous mesophase spherules compounding.The present invention reduces internal resistance by the way of laser full weld, improves the fast charging and discharging ability of battery core, and soft carbon and carbonaceous mesophase spherules compounding form during negative material uses, and have quick charge capability and low temperature charging ability concurrently.
Description
【Technical field】
The present invention relates to the technical field of lithium ion battery, more particularly to a kind of automobile opens-stop system lithium ion battery.
【Background technology】
As Chinese Government is persistently encouraged energy-saving and environment-friendly automobile, low oil consumption saves vehicle, will turn into domestic motor market
Main flow.Meanwhile regulation requires oil consumption increasingly severeer, in order to reach these requirements, various power-saving technologies are progressively employed
Promote, such as turbocharging, in-cylinder direct-jet, hybrid power, start stop system.
Start stop system, when vehicle is in halted state (non-parked state), engine is (and unconventional by break-off
Idling is kept), while pause, in-engine lubricating oil can continuous running, engine interior is kept lubrication；Made when unclamping
After dynamic pedal, engine will be again started up, now,, also will not be right even if frequently stopping and starting to walk because lubricating oil circulates always
Engine interior causes to wear evidence.Relevant report, being capable of fuel-economizing 4%~5% equipped with start stop system automobile.And lithium ion battery
Capacity is big, impulsive discharge ability is strong, the most suitable for start and stop power supply.
But there are two big key issues in lithium-ion-power cell as automobile start and stop power supply：1) lithium-ion-power cell exists
Discharge and recharge problem under low temperature environment：Internal resistance increases lithium-ion-power cell at low ambient temperatures, active volume and multiplying power discharging
Performance is significantly reduced, and easily causes startup ability to decline and can not normally start vehicle；2) the serious is low temperature charging performance,
I.e. the charging of lithium-ion-power cell low temperature is also easy to produce analysis lithium phenomenon, sets off an explosion.And traditional lithium ion battery is using spot welding
Mode (refers to Fig. 1), generally only 4 each pads, and internal resistance is big, have impact on the fast charging and discharging ability of battery core, therefore, it is necessary to
It is proposed that a kind of automobile opens-stop system lithium ion battery, solution conventional ion battery fast charging and discharging ability is poor, low temperature fills
The problem of electric bad low temperature.
【The content of the invention】
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of automobile opens-stop system lithium ion
Battery, it aims to solve the problem that the positive terminal sub-assembly internal resistance of conventional ion battery in the prior art is higher, fast charging and discharging ability compared with
Difference, the technical problem of the bad low temperature of low temperature charging.
To achieve the above object, the present invention proposes a kind of automobile and opens-stop system lithium ion battery, including Explosion-proof cap
The upper end connection of cap, failure of current device, shell and battery core, described failure of current device and battery core, described explosion-proof cap
Located at the top of failure of current device, and explosion-proof cap connects with the weldering of failure of current device, and described shell coats whole battery core, and
And the upper end varus of shell compresses the outer rim upper end of explosion-proof cap, described failure of current device is welded by curved slab and surface plate
Form, the center section of described curved slab is in spherical crown planar to lower recess, and the center section of described explosion-proof cap is convex
It is in cap-like structure to go out, and the outer rim upper surface of described curved slab is bonded with the outer rim lower surface of explosion-proof cap, and curved slab is outer
The outer edge full weld of edge and explosion-proof cap connects, and the lower end weldering of described surface plate and curved slab connects, under described surface plate
End face and the upper surface of battery core connect, and described battery core is the structure formed by positive pole, barrier film, negative pole helically coiling, described
Negative pole be by being uniformly coated on copper foil and being formed by soft carbon and the negative material that forms of carbonaceous mesophase spherules compounding.
Preferably, the external diameter for the curved slab stated is identical with the external diameter of explosion-proof cap, and curved slab is bonded with explosion-proof cap
Afterwards, a circle laser spot welding is carried out along the outer of curved slab and explosion-proof cap junction by laser-beam welding machine, realizes curved slab
It is connected with explosion-proof cap full weld.
Preferably, outer ring equidistantly distributed of the described explosion-proof cap in convex part has some steam vents.
Preferably, described failure of current device also includes connection ring, described connection ring is welded under curved slab
End face, opening's edge offers stopper slot in the lower end of described connection ring, and described surface plate is inlaid in described stopper slot, and
The center of surface plate offers through hole, and described through hole interior edge is welded by the lower surface of laser-beam welding machine and curved slab to be connected.
Preferably, described failure of current device is made up of aluminium flake.
Preferably, being provided with a circle shoulder in the upper inside wall of described shell, the internal diameter of described shoulder, which is less than, to be prevented
Quick-fried block and the external diameter of failure of current device, the lower surface outer rim of described failure of current device prop up shoulder upper surface.
Preferably, described barrier film is set between a positive electrode and a negative electrode.
Preferably, the compound proportion of soft carbon and carbonaceous mesophase spherules is 1 in described negative material：(2~5).
Beneficial effects of the present invention：Compared with prior art, a kind of automobile provided by the invention opens-stop system lithium ion
Battery, rational in infrastructure, by the way of laser full weld, conducting energy between the two is greatly improved with failure of current device in explosion-proof cap
Power, more solder joint can increase the contact area of explosion-proof cap and failure of current device, and traditional spot welding, pole are replaced with full weld
The big contact internal resistance for reducing battery core, by actual measurement, internal resistance is reduced to 0.08mOhm by original 0.12mOhm averages, improved
The fast charging and discharging ability of battery core, meanwhile, connected by the full weld of a circle, greatly improve the shock resistance of battery core, help
More preferable stability is kept in battery core；Soft carbon and carbonaceous mesophase spherules compounding form during negative material uses, and can have concurrently quick
Charging ability and low temperature charging ability, circulating battery ability are obviously improved, and support more than 10C fast charges, cycle life 800
It is secondary to keep 80%.
The feature and advantage of the present invention will be described in detail by embodiment combination accompanying drawing.
【Brief description of the drawings】
Fig. 1 is that a kind of automobile of the embodiment of the present invention opens the-schematic diagram of stop system lithium ion battery；
Fig. 2 is that a kind of automobile of the embodiment of the present invention opens-half cut-away view of stop system lithium ion battery；
Fig. 3 is that a kind of automobile of the embodiment of the present invention opens the-top view of stop system lithium ion battery.
In figure：1- explosion-proof caps, 2 failure of current devices, 21- curved slabs, 22- surface plates, 23- connection rings, 24- are spacing
Groove, 25- through holes, 3- shells, 31- shoulders, 4- battery cores.
【Embodiment】
To make the object, technical solutions and advantages of the present invention of greater clarity, below by drawings and Examples, to this
Invention is further elaborated.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention,
The scope being not intended to limit the invention.In addition, in the following description, the description to known features and technology is eliminated, to keep away
Exempt from unnecessarily to obscure idea of the invention.
Refering to Fig. 3, the embodiment of the present invention provides a kind of automobile and opens-stop system lithium ion battery, including explosion-proof cap 1,
Failure of current device 2, shell 3 and battery core 4, described failure of current device 2 are connected with the upper end of battery core 4, described Explosion-proof cap
Cap 1 is located at the top of failure of current device 2, and explosion-proof cap 1 connects with the weldering of failure of current device 2, and described shell 3 coats entirely
Battery core 4, and the upper end varus of shell 3 compresses the outer rim upper end of explosion-proof cap 1, and described failure of current device 2 is by curved slab
21 and surface plate 22 be welded, the center section of described curved slab 21 to lower recess be in spherical crown planar, described Explosion-proof cap
It is in cap-like structure that the center section of cap 1 is protruding upward, the outer rim upper surface of described curved slab 21 with the outer rim of explosion-proof cap 1
End face is bonded, and the outer edge of curved slab 21 is connected with the outer edge full weld of explosion-proof cap 1, described surface plate 22 and curved slab
21 lower end weldering connects, and the described lower surface of surface plate 22 is connected with the upper surface of battery core 4, and described battery core 4 is by positive pole, isolation
The structure that film, negative pole helically coiling form, described negative pole are the negative poles by being formed by soft carbon and carbonaceous mesophase spherules compounding
Material is uniformly coated on copper foil and formed.
Further, the external diameter for the curved slab 21 stated is identical with the external diameter of explosion-proof cap 1, and curved slab 21 and Explosion-proof cap
After cap 1 is bonded, a circle laser spot welding is carried out along the outer of curved slab 21 and the junction of explosion-proof cap 1 by laser-beam welding machine,
Realize that curved slab 21 is connected with the full weld of explosion-proof cap 1.
Conventional positive terminal sub-assembly is generally linked together aluminium flake and cover plate by way of spot welding, because technique limits
System, generally only 4 solder joints squeezed into from top to bottom, as shown in figure 1, internal resistance height be present in the sub-assembly that this mode is formed, and it is interior
In the case that resistance is higher, the charge/discharge rates of battery are relatively low；In addition, pass through W=I2R understands that caused Joule heat is more, influences
The security of battery, service life, operating efficiency and customer experience.And the automobile start-stop time with millisecond meter, internal resistance is wanted
Ask very high, the present invention uses brand-new technique, and a circle laser spots are carried out in explosion-proof cap 1 and the junction of failure of current device 2
Weldering, so as to which ducting capacity between the two be greatly improved, more solder joint can increase explosion-proof cap 1 and failure of current device 2
Contact area, reduce the contact internal resistance of battery core.Sub-assembly shows through actual measurement：Internal resistance is reduced to by original 0.12mOhm averages
0.08mOhm, sub-assembly internal resistance more than 30% is directly reduced, improve the charge/discharge rates of battery, meanwhile, more solder joints
Contribute to battery core to keep more preferable antivibration kinetic force, improve the stability of battery core.
In embodiments of the present invention, a circle shoulder 31, described shoulder 31 are provided with the upper inside wall of described shell 3
Internal diameter be less than the external diameter of explosion-proof cap 1 and failure of current device 2, the lower surface outer rim of described failure of current device 2 props up
The upper surface of shoulder 31, and shell 3 is arranged to the conical surface at the outer wall of shoulder 31, plays a part of to strengthen support shoulder 31, contributes to
Improve the structural strength of shoulder 31.
Further, outer ring equidistantly distributed of the described explosion-proof cap 1 in convex part has some steam vents 11, when
When inside battery produces gas, it will be discharged in time from steam vent 11.
Further, described failure of current device 2 also includes connection ring 23, and described connection ring 23 is welded on curved slab
21 lower surface, opening's edge offers stopper slot 24 in the lower end of described connection ring 23, and described surface plate 22 is inlaid in described
Stopper slot 24 in, and the center of surface plate 22 offers through hole 25, the described interior edge of through hole 25 pass through laser-beam welding machine with it is bent
The lower surface weldering of panel 21 connects, and described failure of current device 2 is made up of aluminium flake.
Further, described barrier film is set between a positive electrode and a negative electrode, and soft carbon is with described negative material
Between phase carbosphere compound proportion be 1：(2~5).
Traditional lithium ion battery negative material uses Delanium, is not suitable for low temperature discharge and recharge.Soft carbon is easy graphitization
Carbon, can graphited amorphous carbon at a high temperature of referring to more than 2500 DEG C.The crystallinity of soft carbon is that degree of graphitization is low, crystal grain chi
Very little small, interplanar distance is larger, is advantageous to notable expansion of the insertion of lithium without causing structure；Compatibility with electrolyte simultaneously
Good, charge and discharge platform is higher.Had a clear superiority compared to common graphite at most 6-8C charge rate, soft carbon in terms of fast charge.
However, soft carbon is there is also such as efficiency is low first, compacted density is low, and due to the presence of loose structure, easily absorb water oxygen uptake.
Therefore, the present invention by into carbonaceous mesophase spherules mixing portion soft carbon be used as negative material, quick charge capability can be had concurrently
With low temperature charging ability, more than 10C fast charges, 800 holdings 80% of cycle life are supported.It is now electrochemical at quick charge initial stage
It is smaller to learn polarization, thus carbonaceous mesophase spherules can bear large current charge；Latter stage of charging is arrived, LiCx compounds are gradual
Converted from second order compound L iC12 to single order compound L iC6, polarization sharply increases, and the soft carbon now with larger interlamellar spacing connects
Power.Through experiment test, added in carbonaceous mesophase spherules after a certain proportion of soft carbon, circulating battery ability has obtained significantly carrying
Rise, 10C charge and discharge cycles are promoted to 800 times by adulterating first 500 times, and it is bad to solve the charging of conventional lithium ion battery low temperature
Problem.
A kind of automobile of the present invention opens-stop system lithium ion battery, rational in infrastructure, explosion-proof cap 1 and failure of current device 2
By the way of laser full weld, ducting capacity between the two is greatly improved, more solder joint can increase explosion-proof cap 1 and electric current
The contact area of shearing device 2, traditional spot welding is replaced with full weld, greatly reduces the contact internal resistance of battery core, by surveying,
Internal resistance is reduced to 0.08mOhm by original 0.12mOhm averages, improves the fast charging and discharging ability of battery core, meanwhile, pass through one
The full weld connection of circle, greatly improves the shock resistance of battery core, contributes to battery core to keep more preferable stability；Negative material is adopted
Formed with middle soft carbon and carbonaceous mesophase spherules compounding, quick charge capability and low temperature charging ability, circulating battery energy can be had concurrently
Power is obviously improved, and supports more than 10C fast charges, 800 holdings 80% of cycle life.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent substitution or improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of automobile opens-stop system lithium ion battery, including explosion-proof cap (1), failure of current device (2), shell (3) and
Battery core (4), described failure of current device (2) are connected with the upper end of battery core (4), and described explosion-proof cap (1) is cut located at electric current
The top of disconnected device (2), and explosion-proof cap (1) connects with failure of current device (2) weldering, described shell (3) coats whole battery core
(4), and the upper end varus of shell (3) compresses the outer rim upper end of explosion-proof cap (1), it is characterised in that：Described failure of current
Device (2) is welded by curved slab (21) and surface plate (22), and the center section of described curved slab (21) is in lower recess
Spherical crown planar, it is in cap-like structure that the center section of described explosion-proof cap (1) is protruding upward, the outer rim of described curved slab (21)
Upper surface is bonded with the outer rim lower surface of explosion-proof cap (1), and the outer edge of the outer edge of curved slab (21) and explosion-proof cap (1)
Full weld connects, and the lower end weldering of described surface plate (22) and curved slab (21) connects, described surface plate (22) lower surface and battery core
(4) upper surface connection, described battery core (4) is the structure formed by positive pole, barrier film, negative pole helically coiling, and described is negative
Pole is to be uniformly coated on copper foil to form by the negative material formed by soft carbon and carbonaceous mesophase spherules compounding.
2. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described curved slab
(21) after external diameter is identical with the external diameter of explosion-proof cap (1), and curved slab (21) is bonded with explosion-proof cap (1), Laser Welding is passed through
Pick and carry out a circle laser spot welding along the outer of curved slab (21) and explosion-proof cap (1) junction, realize curved slab (21) with
Explosion-proof cap (1) full weld connects.
3. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described Explosion-proof cap
Outer ring equidistantly distributed of the cap (1) in convex part has some steam vents (11).
4. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described electric current is cut
Disconnected device (2) also includes connection ring (23), and described connection ring (23) is welded on the lower surface of curved slab (21), described connection
Opening's edge offers stopper slot (24) in the lower end of ring (23), and described surface plate (22) is inlaid in described stopper slot (24),
And the center of surface plate (22) offers through hole (25), described through hole (25) interior edge passes through laser-beam welding machine and curved slab (21)
Lower surface weldering connect.
5. a kind of automobile as described in any one of claim 1 and 4 opens-stop system lithium ion battery, it is characterised in that：Institute
The failure of current device (2) stated is made up of aluminium flake.
6. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described shell (3)
Upper inside wall on be provided with a circle shoulder (31), the internal diameter of described shoulder (31) is less than explosion-proof cap (1) and failure of current
The external diameter of device (2), the lower surface outer rim of described failure of current device (2) prop up shoulder (31) upper surface.
7. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described positive pole and
Pass through barrier film interval between negative pole.
8. a kind of automobile as claimed in claim 1 opens-stop system lithium ion battery, it is characterised in that：Described negative pole material
The compound proportion of soft carbon and carbonaceous mesophase spherules is 1 in material：(2~5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710597797.1A CN107346808A (en) | 2017-07-20 | 2017-07-20 | A kind of automobile starting/stopping system lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710597797.1A CN107346808A (en) | 2017-07-20 | 2017-07-20 | A kind of automobile starting/stopping system lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107346808A true CN107346808A (en) | 2017-11-14 |
Family
ID=60258235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710597797.1A Pending CN107346808A (en) | 2017-07-20 | 2017-07-20 | A kind of automobile starting/stopping system lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107346808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111727516A (en) * | 2018-02-16 | 2020-09-29 | Fdk株式会社 | Sealing body and battery |
Citations (9)
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|---|---|---|---|---|
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| US20020048700A1 (en) * | 2000-10-23 | 2002-04-25 | Materials And Systems Research, Inc. | Internally manifolded, planar solid oxide fuel cell (SOFC) stack with an inexpensive interconnect |
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