CN201233936Y - Battery electric core and battery comprising the electric core - Google Patents
Battery electric core and battery comprising the electric core Download PDFInfo
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- CN201233936Y CN201233936Y CNU2008200936651U CN200820093665U CN201233936Y CN 201233936 Y CN201233936 Y CN 201233936Y CN U2008200936651 U CNU2008200936651 U CN U2008200936651U CN 200820093665 U CN200820093665 U CN 200820093665U CN 201233936 Y CN201233936 Y CN 201233936Y
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- 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
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- 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
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Abstract
The utility model provides a battery cell which comprises an positive plate, a negative plate and a diaphragm which are wound or stacked in sequence. Through holes are formed on the positive plate or the negative plate which is arranged on the outermost layer of the battery cell. The utility model further provides a battery with the battery cell. Since the through holes are formed on the surface of the battery cell, an electrolyte can easily enter the battery when electrolyte injection is conducted so that the electrolyte injection efficiency is improved, the aging time is shorted, the storage capacity and the cycle performance of the battery are improved, and at the same time, the self-discharge of the battery is reduced. Furthermore, the utility model has the advantages of simple manufacturing technique, convenience and simple operation.
Description
[technical field]
The utility model relates to a kind of battery battery core and contains the battery of this electricity core.
[background technology]
Battery has been widely used in fields such as mobile communication, notebook computer, video camera, camera, portable instrument as the high-energy-density chemical power source, also be the electric automobile studied energetically of various countries, the first-selected supporting power supply of space power system, become the first-selection of the alternative energy, so people are more and more higher to the performance requirement of secondary cell.
The electric core of prior art for preparing is in closed state substantially, following shortcoming is arranged: 1, electric core is slow to the infiltration rate of electrolyte, cause battery liquid-filling not reach technologic fluid injection mark scope, and increased the digestion time after the electric core fluid injection, cause the fraction defective of battery to improve, increase the production cycle, increase production cost.2, battery in use, remaining electrolyte is difficult in time electric core being carried out the electrolyte supply in the shell, has influenced the cycle performance of battery.3, battery can produce gas in the charge and discharge process, difficult discharge of electric in-core portion, increases electric core thickness, and the delay of gas when particularly changing into will influence the formation of SEI film, and then influences the performance of battery.
Publication number be CN200986932Y patent disclosure fix the electric core of parcel with the gummed paper of band permeability hole, to solve a series of problems that above-mentioned electric core sealing is produced.And electrode active material particularly negative active core-shell material after carrying out repeatedly charge and discharge cycles, because volumetric expansion easily comes off, the gummed paper of fixing parcel generally is attached to the upper and lower side of the vertical coiling direction of electric core, when the gummed paper with the band permeability hole fixes the electric core of parcel, the active material that comes off easily passes the lower end micropore and sneaks into electrolyte in the housing, infiltrate electric core with electrolyte, easily cause battery short circuit, self discharge excessive, problems such as security performance instability.
[utility model content]
The utility model is in order to solve the easy inner micro-short circuit of above-mentioned battery, cause self-discharge of battery excessive, problems such as security performance instability provide a kind of and can not only improve the battery that fluid injection efficient, shortening digestion time, the storage capacity that improves battery and cycle performance can reduce the battery battery core of self-discharge of battery simultaneously and contain this electricity core.
The utility model provides a kind of battery battery core, comprises positive plate, negative plate and the barrier film between positive/negative plate, wherein, contains through hole on the electric core outermost layer pole piece.
Further preferred, the porosity of through hole is 5% to 25%.
The utility model also provides a kind of battery, comprises battery container, electrolyte and electric core, and electric core and electrolyte are sealed in the battery container, and wherein, described electric core is above-mentioned electric core.
The beneficial effect that the utility model produces is:
1, the battery made of the utility model, the easier battery that enters of electrolyte when fluid injection has reduced the fluid injection fraction defective of battery, has improved the fluid injection production efficiency of battery.Shortened the digestion time of battery.
2, the battery of the utility model making, in use remaining electrolyte can in time carry out supply to electric core in the shell, to satisfy battery operated demand.
3, the battery made of the utility model has improved the storage liquid measure of electrolyte, has improved performance, the especially cycle performance of battery.
4, the battery of the utility model making, the easier discharge of the gas that produces in the charge and discharge process reduces cell thickness, improves SEI film film forming environment.
5, the battery of the utility model making, the gummed paper of fixing parcel still is an aporate, after working when battery is long, the electrode active material fines that comes off, can not sneak into electrolyte, and then, cause problems such as self-discharge of battery is excessive, micro-short circuit, fail safe instability with the infiltration of electrolyte and opposite electrode active material contact.
6, the utility model production technology is simple, and is convenient easy to operate.
[description of drawings]
Fig. 1 is the structural representation of the utility model embodiment electricity core;
Fig. 2 is the assembly structure schematic diagram of the utility model embodiment electricity core;
Fig. 3 is the structural representation of the utility model embodiment pole piece;
Fig. 4 is a capacity surplus ratio comparison diagram after the circulation of embodiment 1 of the present utility model, embodiment 2, embodiment 3, comparative example 1, comparative example 2.
Fig. 5 stores 30 back average voltage drop comparison diagrams after the circulation of embodiment 1 of the present utility model, embodiment 2, embodiment 3, comparative example 1, comparative example 2.
Fig. 6 stores 30 back average voltage drop comparison diagrams after the vibration of embodiment 1 of the present utility model, embodiment 2, embodiment 3, comparative example 1, comparative example 2.
1-electricity core; The 2-gummed paper; The 3-lug; The 4-pole piece; 5-is the dressing district not; The 6-through hole
[embodiment]
Below in conjunction with specification drawings and specific embodiments the utility model is described further, but the scope that the utility model is protected is not limited thereto.
The utility model provides a kind of storage capacity that can improve fluid injection efficient, shortening digestion time, improve battery, has improved the Battery Pole Core of cycle performance of battery and reduction self-discharge of battery.
The electricity core is made up of by mode such as reel or stacked positive plate, negative plate and the barrier film between positive/negative plate, and used mode be a common practise to those skilled in the art, and the outermost face of assurance pole piece contains through hole.Superscribe gummed paper at the two ends of the electric core of making then and fix, wherein gummed paper is the atresia gummed paper.
The electricity core has different shapes according to battery case, and shape is a common practise to those skilled in the art, and is for example cylindrical, square etc.
Fig. 1 is a kind of structural representation of electric core of execution mode, and electric core 1 obtains by the mode of reeling, and not dressing on the outermost layer pole piece, and the outermost layer pole piece can also can be negative plate for positive plate.With barrier film at interval, the positive/negative plate end is drawn positive and negative lug 3 between positive/negative plate.Through hole 6 is contained on outermost layer two sides not dressing district 5, and porosity is 5%-25%, preferred 10-20%.Every punching all has a segment distance apart from the edge.Being parallel to coiling direction, to stay limit L2 be 1-4mm, preferred 2mm, and staying limit L4 perpendicular to coiling direction is 2-6mm, preferred 4mm.At the electric core two ends of winding fixing parcel gummed paper 2, wherein gummed paper 2 is the atresia gummed paper.
Fig. 2 is the electric core assembly structure schematic diagram of above-mentioned execution mode, and the outermost layer pole piece can also can be negative plate for positive plate, and from figure as can be seen, through hole 6 is contained on electric core 1 outermost layer two sides after reeling.
Fig. 3 is above-mentioned execution mode] the deployed configuration schematic diagram of the outermost pole piece of electric core, pole piece can also can be negative plate for positive plate, with punch ram through coating, drying, cut, punching in the not dressing district 5 of the pole piece 4 of operation such as scraper, break into uniform row and column, line-spacing L3 is 0.5-8mm, preferred 2-4mm; Row are 1-10mm apart from L1, and are preferred, 2-8mm.Punching can also be in other known methods, for example manual punching of hollow mould, and line number can be done relevant adjustment with the size of pole piece according to actual needs with columns.The form in hole can have any shape, and as circle, prismatic, square, polygon etc., the pattern formed on pole piece 4 of through hole 6 can have any shape simultaneously, for example square, rhombus, polygon, circle etc.
Positive plate comprises positive active material, binding agent, collector, and wherein, described positive active material is not particularly limited, and can be the common active material in this area, such as in cobalt acid lithium, lithium nickelate, LiFePO 4 and the LiMn2O4 one or more.The kind of the adhesive in the described positive electrode and content are conventionally known to one of skill in the art, for example one or more in fluorine resin and polyolefin compound such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) and the butadiene-styrene rubber (SBR).In general, according to the difference of adhesive therefor kind, be benchmark with the weight of positive active material, the content of adhesive is 0.01-10 weight %, is preferably 0.02-5 weight %.The kind of described plus plate current-collecting body has been conventionally known to one of skill in the art, for example can be selected from aluminium foil, Copper Foil, Punching steel strip.In the embodiment of utility model, use aluminium foil as plus plate current-collecting body.The making of described anode sizing agent and coating method have been conventionally known to one of skill in the art.With positive active material, conductive agent, binding agent mix in solvent by a certain percentage and obtain anode sizing agent, evenly are coated on the collector, and the heated baking volatilization removes desolvates, thereby forms positive plate.
Barrier film is arranged between positive plate and the negative plate, has electrical insulation capability and liquid retainability energy.Described barrier film can be selected from various barrier films used in the lithium ion battery, as polyolefin micro porous polyolefin membrane, polyethylene felt, glass mat or ultra-fine fibre glass paper.The position of described barrier film, character and kind are conventionally known to one of skill in the art.
Consisting of of negative plate is conventionally known to one of skill in the art.In general, negative plate comprises collector and coating and/or is filled in negative material on the collector that described negative material comprises negative electrode active material and negative pole adhesive.Described negative electrode active material is not particularly limited, can use embedding of this area routine to disengage the negative electrode active material of lithium, material with carbon element for example, described material with carbon element be selected from non-graphitized charcoal, graphite or the charcoal that obtains by high-temperature oxydation by polyyne family macromolecule material or pyrolytic carbon, coke, organic polymer sinter, active carbon in one or more.The kind of described negative pole adhesive and content are conventionally known to one of skill in the art, for example one or more in fluorine resin and polyolefin compound such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), butadiene-styrene rubber (SBR), hydroxypropyl methylcellulose, sodium carboxymethylcellulose, hydroxyethylcellulose, the polyvinyl alcohol; In general, according to the difference of adhesive therefor kind, be benchmark with the weight of negative electrode active material, the content of negative pole adhesive is 0.01-10 weight %, is preferably 0.02-5 weight %.Described negative material can also comprise that conductive agent to increase the conductivity of electrode, reduces the internal resistance of cell.Described conductive agent is not particularly limited, and can be the cathode conductive agent of this area routine, such as in carbon black, nickel powder, the copper powder one or more.Weight with negative electrode active material is benchmark, and the content of described conductive agent is 0-12 weight %, is preferably 2-10 weight %.Negative current collector can be for negative current collector conventional in the lithium ion battery, as stamped metal, and metal forming, net metal, foamed metal uses Copper Foil as negative current collector in specific embodiments of the present utility model.The preparation method of described negative plate can adopt conventional preparation method.For example, with negative material and solvent, apply and/or be filled on the described collector, drying is rolled or is not rolled, and can obtain described negative plate.Wherein, drying, the method for calendering and condition are conventionally known to one of skill in the art.For example, the temperature of described drying is generally 100-150 ℃.
The utility model also provides the battery that contains this electricity core, and the method that this battery preparation method provides according to the utility model except described electric core prepared, other step was conventionally known to one of skill in the art.
For example electrolyte is not particularly limited, and can use the electrolyte of this area routine.Be selected from the inferior lithium (LiPF6) of hexafluorophosphoric acid, lithium perchlorate, LiBF4, hexafluoroarsenate lithium, lithium halide, chlorine lithium aluminate and the fluorocarbon based sulfonic acid lithium one or more such as electrolyte lithium salt.Organic solvent is selected chain acid esters and ring-type acid esters mixed solution for use, wherein the chain acid esters can be dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), carbonic acid first propyl ester (MPC), dipropyl carbonate (DPC) and other are fluorine-containing, sulfur-bearing or contain at least a in the chain organosilane ester of unsaturated bond, the ring-type acid esters can be ethylene carbonate (EC), propene carbonate (PC), vinylene carbonate (VC), gamma-butyrolacton (γ-BL), sultone and other are fluorine-containing, sulfur-bearing or contain at least a in the ring-type organosilane ester of unsaturated bond.The injection rate of electrolyte is generally 1.5-4.9 gram/ampere-hour, the concentration of electrolyte be generally 0.1-2.0 rub/liter
With specific embodiment the utility model is done further below and described.
Embodiment 1
(1) making of electric core
The preparation of positive plate:
With positive active material cobalt acid lithium (LiCoO
2), conductive agent acetylene black, binding agent PVDF and organic solvent N-dimethyl pyrrolidone (NMP) be according to mass ratio LiCoO
2: acetylene black: the PVDF:NMP=100:4:1.5:40 mixing and stirring, make anode sizing agent, this slurry is coated on wide 400 millimeters, the thick 20 microns aluminium foil equably, 120 ℃ of oven dry then obtain the positive plate that thickness is 180 μ m.
On cutting machine, cut after the collector of positive electrode rolled under 3MPa pressure and obtain being of a size of 490 millimeters * 42 millimeters * 135 microns positive plate, wherein contain 8.1 gram positive active materials.
At 490 millimeters * 42 millimeters * 135 microns positive plate one ends by the ultrasonic spot welder corresponding lug of burn-oning, and an other end distance begun from 80mm place, pole piece edge to remove collection liquid surface dressing with scraper, other technology changes according to each producer is different, pole piece is when being wound into pole piece, can reel according to different process, but must guarantee the one side not having the dressing district and contain through hole outermost one deck at electric core.
At the not dressing district of pole piece perforating by punching, break into 3 row, 4 row with punch press.Distance apart from the dressing district is 4mm, the 4mm of Liu Bian up and down of line direction.Mobile pole piece, again in the not dressing district of not punching with the auspicious through hole of stamping 3 row 4 row.The distance of punching was 2 * 4mm apart from last time, and the Liu Bian up and down of line direction is similarly 4mm.
The preparation of negative plate:
100 weight portion negative electrode active material native graphites, 5 weight portion adhesive polytetrafluoroethylene (PTFE)s, 4 weight portion conductive agent carbon blacks are joined in 120 parts by weight of deionized water, in de-airing mixer, stir then and form cathode size stable, homogeneous.
This slurry is coated on wide 400 millimeters, the thick 10 microns Copper Foil equably, after 120 ℃ of oven dry, rolling, on cutting machine, cuts and obtain being of a size of 43 millimeters * 510 millimeters * 135 microns negative plate, wherein contain 3.8 gram negative electrode active materials.
The preparation of electricity core:
With positive and negative plate and the corresponding barrier film for preparing, reel by up-coiler, and the pole piece face that guarantees when reeling through hole is arranged is all the time at outermost layer, and the end back of reeling wraps immobilization with adhesive tape at the bottom and the top of electric core, makes 4.5 millimeters * 31 millimeters * 46 millimeters electric core.
(2) making of battery
LiPF6 and ethylene carbonate (EC) and diethyl carbonate (DEC) are configured to the solution that LiPF6 concentration is 1.0 mol (wherein, the volume ratio of EC and DEC is 1:1), obtain nonaqueous electrolytic solution.The electric core retainer plate of (1) preparation is advanced in 5.2 millimeters * 34 millimeters * 50 millimeters the square aluminum hull, nonaqueous electrolytic solution is injected battery case with the amount of 3.5-3.9g, lithium ion battery is made in sealing.
(1) making of pole piece:
Method according to embodiment 1 prepares electric core, and different is the preparation of positive plate, breaks into 6 row, 8 row at every turn
(2) making of battery
Method according to embodiment 1 prepares battery, and the different electric cores that is to use is the electric core of embodiment 2.
(1) making of electric core
Method according to embodiment 1 prepares electric core, and different is the preparation of positive plate, does not punch.
Negative plate punches by the mode of embodiment 1.
Negative plate outside during coiling.
(2) making of battery
Method according to embodiment 1 prepares battery, and the different electric cores that is to use is the electric core of embodiment 3, and battery case is a box hat.
Comparative Examples 1
(1) making of electric core
Method according to embodiment 1 prepares electric core, and different is the preparation of positive plate, does not punch.
(2) making of battery
Method according to embodiment 1 prepares battery, and the different electric cores that is to use is the electric core of Comparative Examples 1.
Comparative Examples 2
(1) making of electric core
Method according to Comparative Examples 1 prepares electric core, and different is that the fixing gummed paper that wraps up contains permeability hole
(2) making of battery
Method according to Comparative Examples 1 prepares battery, and the different electric cores that is to use is the electric core of Comparative Examples 2.
Performance test:
(1) the good evaluation of fluid injection: choose 300 batteries that the foregoing description 1,2,3 and comparative example 1,2 made respectively,, carry out the contrast of reservoir quantity by taking by weighing forward and backward each battery weight of fluid injection and record, be lower than be limited under the reservoir quantity bad.
(2) the liquid storage ability of battery: residual volume behind the measurement battery seal.Take by weighing the weight of battery before the fluid injection and seal the weight and the record of back battery, the weight of sealing the back battery is subtracted battery weight is the liquid storage amount before fluid injection.
(3) cycle performance: adopt and hold up day 9300 equipment, be charged to 4.2V, then discharge into 3.0V, circulate continuously 500 times, write down per 50 times capacity surplus ratio with 1C by 1C.
(4) self discharge test:
The self discharge of circulation back is relatively: choose 10 batteries that the foregoing description 1,2,3 and comparative example 1,2 are made respectively, after the 1C charge and discharge cycle 500 times, constant-current constant-voltage charging carries out storage at normal temperature and tests its voltage drop after 30 days behind 4.20V again.
Vibration back self discharge is compared: choose 10 batteries that the foregoing description 1,2,3 and comparative example 1,2 are made respectively, after being charged to 4.20V, adopted the 80HZ frequency vibration 2 hours, constant-current constant-voltage charging carries out storage at normal temperature and tests its voltage drop after 30 days behind 4.20V again.
(5) security performance test:
Circulation back security performance compares: choose 10 batteries that the foregoing description 1,2,3 and comparative example 1,2 are made respectively, after the 1C charge and discharge cycle 500 times, overcharge safety test on Agilent constant current constant voltage source, voltage transfers to 12V during test, and electric current transfers to 0.95A and charges.
Test result
Test result is as table 1-4
Fig. 4-6
Table 1
From last table we as can be seen, no matter the outermost layer pole piece is positive pole or negative pole, as long as electric core outermost layer pole piece contains through hole, the fluid injection fraction defective of battery all will be well below the battery of atresia closed state, and on the gummed paper than fixing parcel the also good of permeability hole is arranged.
Table 2
From last table we as can be seen, no matter the outermost layer pole piece is positive pole or negative pole, as long as electric core outermost layer pole piece contains through hole, all obvious battery height of the residual volume of electrolyte behind the battery seal than atresia closed state, and have the effect of permeability hole good on the gummed paper than fixing parcel.
Table 3
From last table we as can be seen, no matter the outermost layer pole piece is positive pole or negative pole, as long as electric core outermost layer pole piece contains through hole, all obvious battery height of the cycle performance of battery than atresia closed state, and have the effect of permeability hole not bad on the gummed paper than fixing parcel.
The reaction that Fig. 4 is vivider battery cycle performance relatively, no matter the outermost layer pole piece is positive pole or negative pole as can be seen from scheming to go up us, as long as electric core outermost layer pole piece contains through hole, the all obvious battery height of the cycle performance of battery than atresia closed state, and have the effect of permeability hole not bad on the gummed paper than fixing parcel.
Table 4
(annotate: failing is the battery breach)
From last table we as can be seen: through 500 times the circulation after, the utility model over-charging of battery ability improves a lot than Comparative Examples.
From Fig. 5 we as can be seen, the battery of Comparative Examples 2 adopts the fixing parcel of the gummed paper that has permeability hole, circulate constant-current constant-voltage charging after 500 times to 4.20V, and its voltage drop is obviously than the battery with the fixing parcel of gummed paper of permeability hole is not many after 30 days to carry out storage at normal temperature, and self discharge is wanted greatly.
From Fig. 6 we as can be seen, the battery of Comparative Examples 2 adopts the fixing parcel of the gummed paper that has permeability hole, constant-current constant-voltage charging is to 4.20V after 2 hours for the 80HZ frequency vibration, and its voltage drop is not obviously than many with the fixing battery that wraps up of the gummed paper of permeability hole after 30 days to carry out storage at normal temperature, and it is big that self discharge is wanted.
Be compared with existing technology and the utlity model has following beneficial effect:
1, the battery of the utility model making, the easier battery that enters of electrolyte when fluid injection, Reduce the fluid injection fraction defective of battery, improved the fluid injection production efficiency of battery. Shorten The digestion time of battery.
2, the battery of the utility model making, in use remaining electrolyte energy in the shell Enough in time battery core is carried out supply, to satisfy battery operated demand.
3, the battery made of the utility model has improved the storage liquid measure of electrolyte, has improved The performance of battery, especially cycle performance.
4, the battery of the utility model making, the easier row of the gas that produces in the charge and discharge process Go out, reduce cell thickness, improve SEI film film forming environment.
5, the battery of the utility model making, the gummed paper of fixing parcel still is aporate, electricity After the work, the electrode active material fines that comes off can not sneaked into electrolyte when the pond was long, And then with the infiltration of electrolyte and opposite electrode active material contact, cause battery certainly The problems such as excessive, micro-short circuit, security instability of discharging.
6, the utility model production technology is simple, and is convenient easy to operate.
Claims (7)
1, a kind of battery battery core is reeled or stacked formation successively by positive plate, negative plate and the barrier film between positive and negative plate, it is characterized in that, described electric core outermost layer positive plate or negative plate are provided with through hole.
2, battery battery core as claimed in claim 1 is characterized in that, the porosity of described through hole is 5% to 25%.
3, battery battery core as claimed in claim 1 is characterized in that, that described shape of through holes is selected from is square, in the rhombus, circle, polygon one or more.
4, battery battery core as claimed in claim 1 is characterized in that, one or more in the above sets of vias squarely of pole piece, rhombus, circle, the polygon.
5, battery battery core as claimed in claim 1 is characterized in that, scribbles active material on the described electric core outermost layer pole piece.
6, battery battery core as claimed in claim 1 is characterized in that, does not contain active material on the described electric core outermost layer pole piece.
7, a kind of battery comprises electric core, electrolyte, battery container, and described electric core and electrolyte are sealed in the battery container, it is characterized in that, any electric core that is provided among the claim 1-6 is provided described electric core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200936651U CN201233936Y (en) | 2008-04-26 | 2008-04-26 | Battery electric core and battery comprising the electric core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200936651U CN201233936Y (en) | 2008-04-26 | 2008-04-26 | Battery electric core and battery comprising the electric core |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005617A (en) * | 2009-08-28 | 2011-04-06 | 比克国际(天津)有限公司 | Lithium-dynamic battery capable of avoiding gas inflation |
| CN102479978A (en) * | 2010-11-30 | 2012-05-30 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN104953165A (en) * | 2015-07-12 | 2015-09-30 | 陈卡丹 | Overcharge anti-explosion battery |
| CN109286037A (en) * | 2018-11-23 | 2019-01-29 | 曙鹏科技（深圳）有限公司 | A kind of soft bag lithium ionic cell and its manufacture craft |
-
2008
- 2008-04-26 CN CNU2008200936651U patent/CN201233936Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005617A (en) * | 2009-08-28 | 2011-04-06 | 比克国际(天津)有限公司 | Lithium-dynamic battery capable of avoiding gas inflation |
| CN102479978A (en) * | 2010-11-30 | 2012-05-30 | 上海比亚迪有限公司 | Pole core of lithium ion battery and lithium ion battery |
| CN102479978B (en) * | 2010-11-30 | 2016-06-01 | 上海比亚迪有限公司 | The pole piece of lithium ion battery and lithium ion battery |
| CN104953165A (en) * | 2015-07-12 | 2015-09-30 | 陈卡丹 | Overcharge anti-explosion battery |
| CN109286037A (en) * | 2018-11-23 | 2019-01-29 | 曙鹏科技（深圳）有限公司 | A kind of soft bag lithium ionic cell and its manufacture craft |
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