CN103779613A - Ultra-thin lithium ion battery formation system, formation method and manufactured battery - Google Patents
Ultra-thin lithium ion battery formation system, formation method and manufactured battery Download PDFInfo
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- CN103779613A CN103779613A CN201410057195.3A CN201410057195A CN103779613A CN 103779613 A CN103779613 A CN 103779613A CN 201410057195 A CN201410057195 A CN 201410057195A CN 103779613 A CN103779613 A CN 103779613A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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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 invention discloses an ultra-thin lithium ion battery formation system which comprises a battery charger, a pressurizing machine, a battery panel and a drying space, wherein the pressurizing machine and the battery panel are arranged inside the drying space; the battery panel is provided with a battery channel; in formation, an ultra-thin lithium ion battery which is filled with an electrolyte and is not sealed up is loaded into the battery panel, the battery panel is further arranged on the pressurizing machine, the anode and the cathode of the ultra-thin lithium ion battery are respectively connected with the anode and the cathode of the battery charger, so as to charge under the condition that the ultra-thin lithium ion battery is pressurized through the pressurizing machine. The technical problem of exhausting when the ultra-thin lithium ion battery is formed is solved, the lithium ion channels are kept smooth, three charge modes, namely, serial charge, parallel charge or hybrid charge, can be adopted in formation, batch production is achieved, and the battery produced by using the formation system is kept in the cathode pressure state after being manufactured, the anode and the cathode are tightly adhered to a partitioning film, the electric property is stable, and the circulation service life is long.
Description
Technical field
The invention belongs to ultrathin lithium ion battery technical field, be specifically related to the battery of ultrathin lithium ion battery formation system, chemical synthesizing method and making.
Background technology
Firm produced lithium ion battery need to carry out low current charge for the first time, so that electrode surface forms one deck solid electrolyte interface film-SEI(solid electrolyte interface) film, be called and change into, in formation process, in battery, can produce certain gas.
Present polymer Li-ion battery and flexible packing lithium ion battery are in process of production, battery leaves airbag to hold the gas that changes into generation while injecting electrolyte, after changing into, pierce through again airbag, vacuumize, extract the gas producing while changing into, under vacuum state, by airbag one side seal, produce battery negative pressure, stiffening, that cycle life is good.
In present box hat and lithium ion battery with aluminum shell production process, battery has two kinds of ways after injecting electrolyte, the one, remain silent and change into, direct sealing after injection electrolyte, the gas producing in the time changing into is deposited in hard shell always, and production procedure is simple and direct, shortcoming is that battery will have reserved gas storage space, affects the volumetric specific energy of battery; The 2nd, open formation, after injecting electrolyte, wouldn't seal completely, only temporarily seal at injection electrolyte mouth rubberizing paper, the gas producing in the time changing into, can discharge from injecting electrolyte mouth, change into the rear injection electrolyte mouth that just seals completely, although battery need not be reserved gas storage space, improved the volumetric specific energy of battery, but production procedure is long.
When the changing into of present box hat, aluminum hull, polymer and flexible packing lithium ion battery, be all that every battery uses one to discharge and recharge passage battery is discharged and recharged, need very large space and formation cabinet resource.
For ultrathin lithium ion battery, as disclosed in Chinese patent CN202503073U " a kind of ultrathin lithium ion battery " comprises positive plate, negative plate, electrolyte, barrier film and hot melt cushion rubber composition, barrier film separates positive plate and negative plate, between barrier film and positive plate and negative plate, fill electrolyte, positive plate comprises plus plate current-collecting body, anodal cream, positive pole ear composition, plus plate current-collecting body adopts titanium foil or titanium alloy paper tinsel or lead foil, anodal cream coheres on plus plate current-collecting body, the plus plate current-collecting body positive pole ear of directly extending out, negative plate comprises negative current collector, negative pole cream, negative lug composition, negative current collector adopts stainless steel foil or Copper Foil or nickel foil or titanium foil or titanium alloy paper tinsel or lead foil, negative pole cream coheres on negative current collector, negative current collector is directly drawn negative lug, the double packaging film that does of collector, hot melt cushion rubber is by plus plate current-collecting body edge and the fusion encapsulation of negative current collector edge.The chemical synthesizing method of present box hat, aluminum hull, polymer and flexible packing lithium ion battery is all inapplicable, even if not be afraid of trouble to ultra-thin lithium ion pond design airbag, ultrathin lithium ion battery is owing to there is no hard shell, can not oppress positive/negative plate and barrier film close contact, the gas that while changing into, charging produces can cut off the path of lithium ion, particularly, for battery system and the battery of large (more than 10mAh) of capacity, produce more gas in the follow-up middle meeting that changes into, cannot complete charging operations; In addition, the slimline battery of design airbag easily causes battery short circuit in the time of excision airbag, affects battery quality and rate of finished products.
Due to the deficiencies in the prior art, limit the development of ultrathin lithium ion battery and the expansion of kind, so must find the apparatus and method for of high efficient and reliable, could produce ultrathin lithium ion battery in enormous quantities.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of ultrathin lithium ion battery formation system is provided, this system changes into unsealed ultrathin lithium ion battery pressurization after injecting electrolyte in dry environment, and the gas producing can be discharged smoothly.The present invention also provides and has applied the chemical synthesizing method of above-mentioned formation system and the battery that this System and method for of application is made.
In order to achieve the above object, the present invention is to injecting after electrolyte not completely the ultrathin lithium ion battery of the sealing open formation that pressurizes in dry environment, and the gas producing while forcing charging is discharged, and has kept lithium ion path unimpeded; Utilize the feature that ultrathin lithium ion battery volume is little, capacity is little, to ultrathin lithium ion battery connect or (with) charged in parallel, such battery conduit just can charge to multiple batteries, saves space and resource, realizes ultrathin lithium ion battery mass production.
The lithium ion battery of different structure has different definition to " ultra-thin ", just can be called ultrathin lithium ion battery as lithium ion battery with aluminum shell thickness is thinner than 4mm.
Indication ultrathin lithium ion battery of the present invention is directly to use plus plate current-collecting body and negative current collector is double does the lithium ion battery that thickness that packaging film does is less than 1mm; There is no extra rigid package shell and flexible packaging film, can have external coating or the external pasting film of protection needs or needs attractive in appearance.
The technical scheme of formation system of the present invention is as follows:
The first scheme: ultrathin lithium ion battery formation system, comprise charger, pressuring machine, battery panel and dry place, described pressuring machine and battery panel are located in dry place, and described battery panel is provided with battery conduit; While changing into, unsealed ultrathin lithium ion battery after injection electrolyte is loaded on battery panel, then described battery panel is arranged on pressuring machine, the both positive and negative polarity of ultrathin lithium ion battery is connected with the both positive and negative polarity of charger respectively, and charges in the situation that pressuring machine pressurizes to ultrathin lithium ion battery.
Described dry place is glove box inner chamber, hothouse or drying plant, preferably glove box inner chamber, described pressuring machine and battery panel are located in glove box inner chamber, described dry place controlled humidity≤5%RH, preferably humidity≤1%RH, to meet the requirement of open formation environment.
Described pressuring machine comprises frame and pressure applicator, and described pressure applicator is arranged in frame, and described battery panel is placed in frame after loading ultrathin lithium ion battery; While changing into, the ultrathin lithium ion battery in the push rod pushing battery conduit of described pressure applicator, ultrathin lithium ion battery charges under the state of pressurized.
Preferably, described frame is cuboid, and its inside is provided with the rectangular cavities of upside and a sidewall opening, and the cavity wall of a frame side relative to pressure applicator is provided with the push rod coaxial with push rod; Described battery panel is cuboid, and it is provided with the battery conduit of side opening, and battery conduit one or both ends are provided with pressurization through hole; Two electrodes of described charger are electrically connected with push rod and push rod respectively, and with pressure applicator, insulation is connected push rod with frame respectively with push rod.Like this, in the time that battery panel is installed, be convenient to the location of battery panel, for the battery panel that is provided with two pressurization through holes, be resisted against on rectangular cavities sidewall, and make push rod pass one pressurization through hole stretch in rectangular cavities, at this moment the pressurization through hole of the other end also aligns with the push rod of pressure applicator; Pressure applicator is opened charger the ultrathin lithium ion battery in battery conduit is carried out to open formation charging first after exerting pressure the ultrathin lithium ion battery in battery conduit being compressed.
As a kind of improvement project, in the battery conduit of described battery panel, be equipped with the metal sheeting that some sizes match with battery conduit, each ultrathin lithium ion battery is arranged in the same way and is loaded between each metal sheeting, each like this ultrathin lithium ion battery can be urged and put in place, and the gas producing when guaranteeing to charge can be discharged from.Metal sheeting can arrange minor insulation district and follow the lug contact of the ultrathin lithium ion battery with lug to cause short circuit to prevent metal sheeting.
As further improvement project, described metal sheeting one or both sides are provided with boss, and the position of boss is corresponding with the position of ultrathin lithium ion battery electrode cream, and and the area of area≤negative pole cream of the area≤boss of anodal cream.Like this, be greater than the ultrathin lithium ion battery at electrode cream position for edge sealing thickness, when pressure applicator pushing, can guarantee that pressure energy is delivered to the position of electrode cream, to keep anodal cream, negative pole cream, barrier film closely to contact with electrolyte in formation charging process, the gas producing when compressing changes into is discharged.
Described pressure applicator is cylinder, air bag, hydraulic cylinder, jack, pneumohydraulic pressure-cylinder, spring, catapult, clip, fixture, weight, screw rod, servomotor or lead screw motor, is preferably cylinder.
Described charger is direct current programmable power supply, programmable power supply, constant voltage supply, constant-current supply, charger, discharges and recharges cabinet, formation cabinet or pulse charger.
As a kind of improvement project of enhancing productivity, pressuring machine has been arranged side by side more than two, or pressuring machine is stacked arranges more than two.Can hold so more battery panel simultaneously, utilize better dry place, enhance productivity.
Apply a chemical synthesizing method for above-mentioned formation system, it comprises following operating procedure:
A. unsealed ultrathin lithium ion battery after injecting electrolyte is arranged to the battery conduit that is loaded into battery panel in the same way; Or, unsealed ultrathin lithium ion battery after injecting electrolyte is arranged to the battery conduit that is loaded into battery panel in the same way, and places metal sheeting on the two sides of battery;
B. the battery panel that has loaded ultrathin lithium ion battery is installed in pressuring machine;
C. start pressuring machine, with ultrathin lithium ion battery or metal sheeting in the pressure pushing battery panel of setting, realize being connected in series of each ultrathin lithium ion battery;
D. open charger, set charge parameter, the ultrathin lithium ion battery in battery panel is charged, the oppressed discharge of gas producing while simultaneously charging;
E. ultrathin lithium ion battery completes after charging, and battery panel is taken out from pressuring machine, then ultrathin lithium ion battery is taken out from battery panel, completes open formation charging first.
First scheme of the present invention:
This programme the first scheme is compared, and the battery panel of this programme is provided with 2 above battery conduits side by side.In each battery conduit, be equipped with the metal sheeting that some intervals arrange, size matches with battery conduit, and the metal sheeting of same position is connected in parallel into metal sheeting group in each battery conduit, adjacent metal compressing tablet group is connected with positive pole and the negative pole of charger respectively; Each is connected in parallel with the anodal metal sheeting group being connected, and the metal sheeting group that each is connected with negative pole is connected in parallel, and is provided with insulating spacer between every two groups of metal sheeting groups; Be provided with battery panel pressing plate in one end of battery conduit, battery panel pressing plate is provided with the pressure head corresponding with each battery conduit, and pressuring machine pushing battery panel pressing plate makes the bottom pushing metal sheeting group of battery panel pressing plate to battery conduit.
This programme adopts charging modes in parallel, can adopt lower charging voltage to realize the open formation first of battery.
Preferably, described battery panel is provided with the elongated slot of side opening, is provided with some battery conduit dividing plates that are set up in parallel in described elongated slot, between each battery conduit dividing plate, is the battery conduit that width is equal; And one end of each battery conduit dividing plate and the sidewall of elongated slot leave the passageway for placing battery dish pressing plate, and the side that described elongated slot is positioned at battery panel pressing plate is provided with pressurization through hole, the push rod of described pressure applicator is by pressurization through hole pushing battery panel pressing plate.
Preferably, described metal sheeting group comprises compressing tablet connecting rod and 2 metal sheetings that are located at above on compressing tablet connecting rod, and described metal sheeting equalization is arranged on the same side of compressing tablet connecting rod, and each metal sheeting snaps in corresponding battery conduit.
Apply a chemical synthesizing method for first scheme formation system of the present invention, it comprises following operating procedure:
A. unsealed ultrathin lithium ion battery after injection electrolyte is arranged in the same way and is loaded between metal sheeting adjacent in each battery conduit, and make the unsealed position of battery upwards;
B. the battery panel that has loaded ultrathin lithium ion battery is installed in the frame of pressuring machine;
C. start pressuring machine, with the pressure pushing battery panel pressing plate of setting, realize being connected in parallel of ultrathin lithium ion battery;
D. open charger, set charge parameter, the ultrathin lithium ion battery in battery panel is charged, the oppressed discharge of gas producing while simultaneously charging;
E. ultrathin lithium ion battery completes after charging, and battery panel is taken out from pressuring machine, and the then taking-up from battery panel by ultrathin lithium ion battery, completes open formation charging first.
Can also adopt in addition the combination of the first scheme and alternative plan to realize, adopt exactly the method for series-parallel connection, by changing the mode of connection of circuit, in parallel after realizing ultrathin lithium ion battery to be changed and first connecting, or first rear series connection in parallel, in the situation of pressurization, ultrathin lithium ion battery is carried out to formation charging.
The present invention also provides a kind of battery that above-mentioned formation system is made of applying, and after this battery changes into, does vacuum seal in dry place, then from dry place, take out do continuously change into, partial volume and check.
The present invention also provides a kind of battery that above-mentioned chemical synthesizing method is made of applying, and after this battery changes into, does vacuum seal in dry place, then from dry place, take out do continuously change into, partial volume and check.
Compared with prior art, beneficial effect of the present invention is:
1. change at dry place inner opening, prevent that battery water suction from damaging;
2. opening pressurization changes into, and the oppressed discharge of gas producing while changing into, has kept lithium ion path unimpeded;
3. adopt serial connection charge or charged in parallel, a charge tunnel can, simultaneously to multiple battery chargings, improve production efficiency, has saved the space of production cost and hold facility;
4. the battery that application formation system of the present invention or chemical synthesizing method are produced can make battery keep negative pressure state in follow-up processing and use procedure, and both positive and negative polarity and barrier film fit tightly, and electric performance stablity has extended cycle life;
5. can mass production ultrathin lithium ion battery.
Accompanying drawing explanation
Fig. 1 is the structure chart of the ultrathin lithium ion battery formation system in embodiment mono-;
Fig. 2 is the structure chart of the pressuring machine that battery panel is installed in embodiment mono-;
Fig. 3 is the vertical view of the pressuring machine that battery panel is installed in embodiment mono-;
Fig. 4 is the structure chart of an angle of the battery panel in embodiment mono-;
Fig. 5 is the structure chart of another angle of the battery panel in embodiment mono-;
Fig. 6 is the front view of the battery panel in embodiment mono-;
Fig. 7 is the structure chart of an angle of the battery panel in embodiment five;
Fig. 8 is the structure chart of another angle of battery panel in embodiment five;
Fig. 9 is the vertical view of the battery panel in embodiment five.
Embodiment
Battery of the present invention all refers to the sub-battery of ultra-thin lithium, of the present invention changing into refers in the sub-battery production process of ultra-thin lithium, battery injects the initial charge operation after electrolyte, the object of charging is in order to make electrode surface form one deck solid electrolyte interface film-SEI(solid electrolyte interface) film, and the gas in the situation that battery does not seal completely, initial charge being produced is discharged.
The present invention charges to series, parallel or series-parallel connection battery in the pressurization of dry environment split shed, with charged state SOC(station of charge) calculate, can be filled with 20-100%SOC, if too low, change into aerogenesis and do not complete, Ruo Taigao can overcharge.Preferably, to be filled with 30-60%SOC as good, guarantee to change into that aerogenesis completes and take less the charging interval of battery in dry place.Usually, select the charger of suitable voltage range and current range according to the sub-battery variety of ultra-thin lithium, series connection quantity, quantity in parallel or series-parallel connection quantity; For the charging of batteries in parallel connection, establishing its total capacity is C, can charge by 0.1C-1C, be generally charged as by 0.2C-0.5C good, can one step charging, if 0.5C constant current charge is to 30%SOC; Also can multistep charge, if 0.2C constant current charge is to 10%SOC, turn 0.5C constant current charge to 30%SOC.Usually, in the time that charge volume is less than 100%SOC, can be understood as in advance and change into.
Before changing into, need to make positive/negative plate, rubberizing, assembling, non-closed sealing, oven dry, fluid injection in dry place according to known method; After changing into, need to, according to known method, in dry place, carry out vacuum seal to battery, then produce that dry place continuous changes at continuous formation workshop, partial volume, check, obtain qualified ultrathin lithium ion battery.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described.
Embodiment mono-:
Referring to Fig. 1 to Fig. 6, the ultrathin lithium ion battery formation system of the present embodiment, comprise glove box 1 and charger 2, in described glove box 1, be provided with pressuring machine 3 and battery panel 4, described battery panel 4 is provided with the battery conduit 401 of the long trough of side opening, battery conduit 401 is for placing ultrathin lithium ion battery 403, and ultrathin lithium ion battery 403 series connection are placed, described pressuring machine 3 comprises frame 302 and pressure applicator 301, described pressure applicator 301 is arranged in frame 302, described battery panel 4 is placed in frame 302, one end of described battery conduit 401 is provided with the pressurization through hole 404 that connects battery panel 4, the other end of described battery conduit 401 is provided with pressurization through hole 405, the push rod 303 of described pressure applicator 301 moves back and forth in battery conduit 401 through pressurization through hole 404, described frame 302 one end are provided with push rod 304, described push rod 304 can stretch in battery conduit 401 through pressurization through hole 405, two electrodes of described charger 2 are connected with push rod 303 and push rod 304 by wire 5 respectively.
Referring to Fig. 3 and Fig. 4, described frame 302 is cuboid, and its inside is provided with rectangular cavities, and the upside of rectangular cavities and front side are provided with opening 3022 and 3021, so not only convenient operation person placing battery dish 4, the change situation that also handled easily person observes battery simultaneously.The left/right of described frame 302 is provided with pressure applicator 301, and the push rod 303 of pressure applicator 301 can stretch in rectangular cavities and reciprocatingly move, and the cavity wall of frame 302 side relative to pressure applicator 301 is provided with push rod 304.
Described push rod 304 is coaxially oppositely arranged with push rod 303; And push rod 304 axle center equate to the distance of lateral wall with the distance of rectangular cavities rear wall and pressurization through hole 405 centers of circle of battery panel 4, as the scheme of refinement more, described battery panel 4 is cuboid, its inside is provided with the battery conduit 401 of side opening, and its two ends are arranged with pressurization through hole (through hole 404 and pressurization through hole 405 pressurize).Like this, in the time that battery panel 4 is installed, be resisted against on frame 302 rectangular cavities rear walls, and make push rod 304 stretch into rectangular cavities through a pressurization through hole, at this moment the pressurization through hole of opposite side also aligns with the push rod 303 of pressure applicator 301, has realized location.
The preferred cylinder 301 of the present embodiment, the diameter of cylinder 301 is selected 30mm, and the head of push rod (cylinder push-rod) 303 is connected with the positive pole (or negative pole) of charger 2, and the head of push rod 303 is connected with the insulation of push rod main body; Equally, the negative pole of the head of push rod 304 and charger 2 (or anodal), the head of push rod 2 is connected with the insulation of push rod main body.
Humidity≤1%RH in glove box 1 energy control cabinet, to meet the requirement of open formation environment.
Charger 2 adopts direct current programmable power supply, voltage range 500V, and current range is 1A, and can accurately control output current within the scope of ± 0.1mA.
As a kind of improvement project, in the battery conduit 401 of described battery panel 4, be equipped with the metal sheeting 402 that some sizes match with battery conduit 401, each ultrathin lithium ion battery 403 is placed between each metal sheeting 402 in the same way, each like this ultrathin lithium ion battery 403 can be urged and put in place, and the gas producing when guaranteeing to charge can be discharged from.
As a kind of scheme of refinement, described metal sheeting 402 one or both sides are provided with boss, and the position of boss is corresponding with the position of ultrathin lithium ion battery 403 electrode creams, and the area of area≤negative pole cream of the area≤boss of anodal cream.Like this, be greater than the ultrathin lithium ion battery 403 at electrode cream position for edge sealing thickness, when pushing, pressure applicator 301 can guarantee that pressure energy is delivered to the position of electrode cream, to keep anodal cream, negative pole cream, barrier film closely to contact with electrolyte in formation charging process, the gas producing when compressing changes into is discharged.
As a kind of improvement project of enhancing productivity, pressuring machine 3 has been arranged side by side more than two, or pressuring machine 3 is stacked arranges more than two, can hold so more battery panel 4 simultaneously, utilizes better the space of glove box 1, enhances productivity.
The quantity of the ultrathin lithium ion battery 403 of the battery conduit 401 interior placements of battery panel 4 is determined by the voltage range of charger 2, as use the charger of 500V, and can the most multipair 119 ultrathin lithium ion battery 403(cobalts acid lithium-graphite ultrathin lithium ion battery) charging.Adopt serial connection charge, can, by ultrathin lithium ion battery 403 in the interior stack charging of same battery conduit 401, save space; During due to charging, be identical by the electric weight of every battery, can control exactly like this charge volume of each battery simultaneously.Even if adopt the indivedual batteries to be changed of series system charging to have the defect of short circuit or micro-short circuit, also can not affect the charging of whole dish battery.
Described charger 2 has DC charging function, except direct current programmable power supply, also can adopt programmable power supply, constant voltage supply, constant-current supply, charger, discharge and recharge cabinet, formation cabinet, pulse charger etc.Due to current common lithium ion battery, if the operating voltage of LiFePO4-lithium titanate battery is 1.0-2.5V, the operating voltage of LiFePO4-graphite battery is 2.0-3.6V, cobalt acid lithium-lithium titanate battery operating voltage is 2.0-3.2V, the operating voltage of cobalt acid lithium-graphite battery is 3.0-4.2V, the operating voltage of LiMn2O4-graphite battery is 3.0-4.2V, and the operating voltage of nickle cobalt lithium manganate-graphite battery is 3.0-4.2V, and therefore the input voltage of charger 2 will be higher than 2.5V.For the situation of plural battery being charged simultaneously, charging current and voltage need to be selected or set according to battery capacity size, number of batteries and connection (serial connection charge, charged in parallel or series-parallel connection charging).
In addition, charger 2 can configure miscellaneous function, and as functions such as record data, setting work step, overvoltage protection, overcurrent protection, overtemperature prote, anti-reverse, anti-short circuit, timings, user can increase above-mentioned miscellaneous function according to actual needs.
Described charger 2 is arranged on outside glove box 1 or in glove box 1, and preferred, charger 2 is arranged on glove box 1 outside, only wire 5 is introduced in glove box 1, can save like this space of more glove boxes 1 inside.Certainly, the accessory of pressuring machine 3 can be arranged on outside glove box 1 as pressure-regulating valve, control switch etc., further to save the space of glove box 1 inside.
The course of work of the present embodiment is below described:
(1) ultrathin lithium ion battery 403 injecting after electrolyte is placed in the battery conduit 401 of battery panel 4 in the same way, metal sheeting 402 is placed on two sides at each battery, and make the unsealed position of battery upwards (be placed with like this discharge that utilizes gas, and can prevent spilling of electrolyte);
For changing into of the battery with lug, insulation processing need to be done in metal sheeting 402 tops, and the lug of battery places upward, to prevent that metal sheeting 402 from contacting and being short-circuited with lug;
For not having lug and electrode cream position thickness to be greater than the changing into of battery of edge sealing thickness, can not place metal sheeting 402, the gas producing while utilizing close contact pushing compressing between battery pole piece to change into is discharged;
(2) battery panel 4 that has loaded ultrathin lithium ion battery 403 is put into the frame 302 of pressuring machine 3, and the push rod 304 that makes pressuring machine 3 stretches in the pressurization through hole of battery panel 4 one sides, and the pressurization through hole of battery panel 4 opposite sides is alignd with the push rod 303 of pressure applicator 301;
(3) start cylinder 301, make push rod 303 with metal sheeting 402 or ultrathin lithium ion battery 403 in the thrust pushing battery panel 4 of setting, at this moment each ultrathin lithium ion battery 403 is realized and being connected in series by the mutual close contact of pole piece or by the mutual close contact of pole piece and metal sheeting 402;
(4) open charger 2 ultrathin lithium ion battery 403 in battery panel 4 is charged, the oppressed discharge of gas producing when charging;
(5) ultrathin lithium ion battery 403 completes after charging, and battery panel 4 is taken out from pressuring machine 3, and the then taking-up from battery panel 4 by ultrathin lithium ion battery 403, completes the operation that changes into of the present invention.
The present embodiment has only illustrated invention key element of the present invention, in addition, and the part operation before also having the equipment such as filling machine, vacuum sealer be used for changing in glove box 1 and after changing into.
Embodiment bis-:
Referring to Fig. 1 to Fig. 6, the present embodiment is the chemical synthesizing method of formation system described in Application Example one, and describe as an example of cobalt acid lithium-graphite battery example, it is provided with lug, and design thickness is 0.24mm, width 30mm, height 30mm, the area of anodal cream is 20 × 20mm, and the area of anodal cream is 22 × 22mm, and design capacity is 10mAh.
It comprises following operating procedure:
A. unsealed ultrathin lithium ion battery 403 after injecting electrolyte is arranged to the battery conduit 401 that is loaded into battery panel 4 in the same way, lug is placed upward, and metal sheeting 402 is placed on the two sides of battery; For not having lug and electrode cream position thickness to be greater than the changing into of battery of edge sealing thickness, can not be placed into metal sheeting 402;
B. the battery panel 4 that has loaded ultrathin lithium ion battery 403 is installed in the frame 302 of pressuring machine 3, the push rod 303 of cylinder 301 and push rod 304 align with the metal sheeting 402 in battery conduit 401 respectively (to not placing the situation of metal sheeting 402, the push rod 303 of cylinder 301 and push rod 304 respectively battery 403 align);
C. the operating pressure of adjusting cylinders 301 is 0.3MPa, starting cylinder 301 makes push rod 303 push metal sheeting 402 in battery conduit 401 (to not placing the situation of metal sheeting 402, push rod 303 directly pushes ultrathin lithium ion battery 403), under the effect of push rod 303 and push rod 304, the pressure that is loaded into anodal cream (area is 20 × 20mm) is 0.5MPa like this;
D. open charger 2, use the charging current of 5mA, to the 36min that charges of the ultrathin lithium ion battery 403 in battery panel 4, be equivalent to 0.5C and be filled with 30%SOC electric weight, the oppressed discharge of gas producing while simultaneously charging;
E. ultrathin lithium ion battery 403 completes after charging, and battery panel 4 is taken out from pressuring machine 3, then ultrathin lithium ion battery 403 is taken out from battery panel 4, completes the charging of open formation first of ultrathin lithium ion battery 403.
Embodiment tri-:
This enforcement is the battery of the formation system made of Application Example one, after this battery changes into, does vacuum seal in glove box, then from glove box, take out do continuous change into, partial volume and check, finally obtain qualified ultrathin lithium ion battery.
Embodiment tetra-:
This enforcement is the battery of the chemical synthesizing method made of Application Example two, after this battery changes into, does vacuum seal in glove box, then from glove box, take out do continuous change into, partial volume and check, finally obtain qualified ultrathin lithium ion battery.
Embodiment five:
Referring to Fig. 7 to Fig. 9, the difference of the present embodiment and embodiment mono-is: the ultrathin lithium ion battery 603 of the present embodiment adopts charged in parallel, and therefore, compared with the battery panel 4 of embodiment mono-, the battery panel 6 of the present embodiment is provided with 2 above battery conduits 608 side by side.Concrete structure is as follows:
In the battery panel 6 of the present embodiment, be provided with 7 battery conduits 608 arranged side by side, in each battery conduit 608, be equipped with the metal sheeting 6021 that some intervals arrange, size matches with battery conduit 608, and in each battery conduit 608, the metal sheeting 6021 of same position is connected in parallel into metal sheeting group 602A(602B), adjacent metal sheeting group 602A is connected with positive pole and the negative pole of charger 2 respectively with 602B, metal sheeting group 602A and 602B have identical structure, only adopt different labels for convenience of describing herein; Each and anodal metal sheeting group 602A(or the 602B being connected) be connected in parallel, be that each metal sheeting group 602A is connected in parallel, metal sheeting group 602B(or 602A that each is connected with negative pole) be connected in parallel, be that each metal sheeting group 606B is connected in parallel, and between every two metal sheeting groups (602A in figure and 602B), be provided with insulating spacer 606, the metal sheeting 6021 of the present embodiment is identical with metal sheeting 402 structures in embodiment mono-.Be provided with battery panel pressing plate 605 in one end of battery conduit 608, battery panel pressing plate 605 is provided with the pressure head 6051 corresponding with each battery conduit 608, on battery panel 6, be provided with pressurization through hole 604, the push rod of pressure applicator can penetrate pressurization through hole 604 and push battery panel pressing plate 605, battery panel pressing plate 605 is moved to the bottom of battery conduit, and pressure head 6051 pushes metal sheeting group 602A.
As a kind of refined structure, described battery panel 6 is provided with the elongated slot 601 of side opening, is provided with some battery conduit dividing plates 607 that are set up in parallel in described elongated slot 601, between each battery conduit dividing plate 607, is the battery conduit 608 that width is equal; And one end of each battery conduit dividing plate 607 and the sidewall of elongated slot 601 leave the passageway for placing battery dish pressing plate 605, the side that described elongated slot 601 is positioned at battery panel pressing plate 605 is provided with pressurization through hole 604.
Described metal sheeting group 602A(602B) structure that is one of the forming, the some impartial metal sheeting 6021 arranging that it comprises compressing tablet connecting rod and is located at compressing tablet connecting rod the same side, and each metal sheeting 6021 snaps in corresponding battery conduit 608.The compressing tablet connecting rod of adjacent metal compressing tablet group 602A and 602B is connected with positive pole and the negative pole of charger 2 respectively; Each and anodal metal sheeting group 602A(or the 602B being connected) compressing tablet connecting rod be connected in parallel, metal sheeting group 602B(or 602A that each is connected with negative pole) compressing tablet connecting rod be connected in parallel.Described insulating spacer 606 comprises partition connecting rod and is located at the some impartial sub-partition arranging of partition connecting rod the same side, and each sub-partition snaps in the metal sheeting group that the corresponding interior obstruct two adjacent groups of battery conduit 608 metal sheeting group is inner adjacent.
Owing to adopting charging modes in parallel, therefore charger 2 adopts direct current programmable power supply, and its voltage range is 5V, and current range is 1A, can accurately control charging current in error ± 0.1mA; Described cylinder bore is selected 100mm.
Be more than the design main points of the present embodiment, other technical characterictic is mutually identical with embodiment mono-, no longer describes at this.The present embodiment adopts charging modes in parallel, can adopt lower charging voltage to realize changing into of battery, even and indivedual battery while there are abnormal conditions, also can not affect the charging of other battery.
The course of work of the present embodiment is below described:
(1) ultrathin lithium ion battery 603 injecting after electrolyte is placed between the interior adjacent metal sheeting 6021 of each battery conduit 608 in the same way, and makes the unsealed position of battery upwards;
(2) battery panel 6 is put into the frame of pressuring machine, and the through hole 604 that makes to pressurize aligns with the push rod of pressure applicator;
(3) start pressure applicator, make the thrust pushing battery panel pressing plate 605 of push rod to set, at this moment between two adjacent metal compressing tablet group 602A and 602B, each ultrathin lithium ion battery 603 is connected in parallel;
(4) open charger the ultrathin lithium ion battery 603 in battery panel is charged, the oppressed discharge of gas producing when charging;
(5) ultrathin lithium ion battery 603 completes after charging, and battery panel 6 is taken out from pressuring machine, and the then taking-up from battery panel 6 by ultrathin lithium ion battery 603, completes the operation that changes into of the present invention.
The present embodiment has only illustrated invention key element of the present invention, in addition, in glove box 1 also have the equipment such as filling machine, vacuum sealer be used for changing into before and change into after part operation.
Embodiment six:
Referring to Fig. 7 to Fig. 9, the present embodiment is the chemical synthesizing method of formation system described in Application Example five, and describe as an example of cobalt acid lithium-graphite battery example, it is provided with lug, and design thickness is 0.24mm, width 30mm, height 30mm, the area of anodal cream is 20 × 20mm, and the area of anodal cream is 22 × 22mm, and design capacity is 10mAh; Be that example describes to there is the battery panel of 608,28 metal sheeting groups of 7 battery conduits simultaneously.
It comprises following operating procedure:
A. unsealed ultrathin lithium ion battery 603 after injection electrolyte is arranged in the same way and is loaded between the interior adjacent metal sheeting 6021 of each battery conduit 608, and make the unsealed position of battery upwards, such 28 metal sheeting groups can load 14 rows totally 98 inject the ultrathin lithium ion battery 603 of (not sealing completely) after electrolyte;
B. the battery panel 6 that has loaded ultrathin lithium ion battery 603 is installed in the frame of pressuring machine, and the through hole 604 that makes to pressurize aligns with the push rod of cylinder;
C. the operating pressure of adjusting cylinders is 0.18MPa, start cylinder and make push rod pushing battery panel pressing plate 605, like this under the effect of cylinder push-rod, the pressure that is loaded into anodal cream (area is 20 × 20mm) is 0.5MPa, the positive pole parallel connection of the ultrathin lithium ion battery 603 between each like this metal crimp group 602A and 602B, negative pole parallel connection, has realized being connected in parallel of ultrathin lithium ion battery 603;
D. open charger, use the charging current of 490mA, to the 36min that charges of the ultrathin lithium ion battery 603 in battery panel 6, be equivalent to 0.5C and be filled with 30%SOC electric weight, the oppressed discharge of gas producing while simultaneously charging;
E. ultrathin lithium ion battery 603 completes after charging, and battery panel 6 is taken out from pressuring machine, and the then taking-up from battery panel 6 by ultrathin lithium ion battery 603, completes the charging of open formation first of ultrathin lithium ion battery 603.
As a kind of improvement project, the present embodiment also can be placed more than 2 ultrathin lithium ion batteries 603 between adjacent metal sheeting 6021 He in battery conduit, realizes the series and parallel connections mixed charged of battery.
Embodiment seven:
This enforcement is the battery of the formation system made of Application Example five, after this battery changes into, does vacuum seal in glove box, then from glove box, take out do continuous change into, partial volume and check, finally obtain qualified ultrathin lithium ion battery.
Embodiment eight:
This enforcement is the battery of the chemical synthesizing method made of Application Example six, after this battery changes into, does vacuum seal in glove box, then from glove box, take out do continuous change into, partial volume and check, finally obtain qualified ultrathin lithium ion battery.
Contrast experiment
By the cobalt acid lithium-graphite batteries identical with embodiment seven with enforcement three, in glove box, inject and do not do opening pressurization after electrolyte and change into, directly vacuum seal, then take out from glove box, change into, partial volume, check, the ultrathin lithium ion battery of the comparative example ultrathin lithium ion battery obtaining and embodiment tri-and embodiment seven is contrasted, sees the following form 1:
The performance comparison of table 1 embodiment tri-, embodiment seven and comparative example battery
| ? | Embodiment tri- | Embodiment seven | Comparative example | Remarks |
| Outward appearance | Negative pressure is adjacent to | Negative pressure is adjacent to | Inflatable is felt like jelly | Check work step is observed |
| Thickness/mm | 0.25 | 0.26 | 0.37 | 100 mean values of check work step |
| Width/mm | 30.2 | 30.2 | 30.1 | 100 mean values of check work step |
| Highly/mm | 30.2 | 30.1 | 30.2 | 100 mean values of check work step |
| Capacity/mAh | 10.3 | 10.2 | 2.8 | 100 mean values of partial volume work step |
| Voltage/V | 4.182 | 4.176 | 4.155 | 100 mean values of check work step |
| Internal resistance/Ω | 2.8 | 2.9 | 5.9 | 100 mean values of check work step |
| Circulation/week | 589 | 528 | 0 | 1C only charges and discharge design load 80% |
Can also adopt in addition the method for series-parallel connection, such as pressuring machine and battery panel shown in the multiple Fig. 2 of application, every group of ultrathin lithium ion battery that pressuring machine is connected with battery panel pressed loading, multiple pressuring machines and battery panel by and tie realize ultrathin lithium ion battery to be changed and first connect and be connected in parallel afterwards, then carry out open formation; For another example the battery panel shown in application drawing 7, every row ultrathin lithium ion battery that loads in parallel, do not fill insulating spacer, battery panel is installed on pressuring machine and pressurizeed, when wiring, the positive pole of the battery of first trip is connected with the both positive and negative polarity of charger respectively with the negative pole in footline pond, after realizing the first parallel connection of ultrathin lithium ion battery to be changed, be connected in series, then carry out open formation.
Compared with prior art, beneficial effect of the present invention is:
1. change at dry place inner opening, prevent that battery water suction from damaging;
2. opening pressurization changes into, and the oppressed discharge of gas producing while changing into, has kept lithium ion path unimpeded;
3. adopt serial connection charge or charged in parallel, a charge tunnel can, simultaneously to multiple battery chargings, improve production efficiency, has saved the space of production cost and hold facility;
4. the battery that application formation system of the present invention or chemical synthesizing method are produced can make battery keep negative pressure state in follow-up processing and use procedure, and both positive and negative polarity and barrier film fit tightly, and electric performance stablity has extended cycle life;
5. can mass production ultrathin lithium ion battery.
The announcement of book and instruction according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore; the present invention is not limited to embodiment disclosed and described above; also should fall in the protection range of claim of the present invention modifications and changes more of the present invention; as charged to manufacture ultrathin lithium ion battery formation system with dry environment opening pressurization serial or parallel connection or series-parallel connection; or use chemical synthesizing method of the present invention and a step charger assembled by several branch is splitted into multistep charging, or charging process is inserted electric discharge work step or shelved work step etc. and all belongs to protection scope of the present invention.In addition,, although used some specific term and nouns of locality in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (14)
1. ultrathin lithium ion battery formation system, is characterized in that: comprise charger, pressuring machine, battery panel and dry place, described pressuring machine and battery panel are located in dry place, and described battery panel is provided with battery conduit; While changing into, unsealed ultrathin lithium ion battery after injection electrolyte is loaded in battery panel, then described battery panel is arranged on pressuring machine, the both positive and negative polarity of ultrathin lithium ion battery is connected with the both positive and negative polarity of charger respectively, and charges in the situation that pressuring machine pressurizes to ultrathin lithium ion battery.
2. ultrathin lithium ion battery formation system according to claim 1, is characterized in that: described dry place is glove box inner chamber, hothouse or drying plant.
3. ultrathin lithium ion battery formation system according to claim 1, is characterized in that: described pressuring machine comprises frame and pressure applicator, described pressure applicator is arranged in frame, and described battery panel is placed in frame after loading ultrathin lithium ion battery; While changing into, the ultrathin lithium ion battery in the push rod pushing battery conduit of described pressure applicator, ultrathin lithium ion battery charges under the state of pressurized.
4. ultrathin lithium ion battery formation system according to claim 3, it is characterized in that: described frame is cuboid, it is provided with the rectangular cavities of upside and a sidewall opening, and the cavity wall of a frame side relative to pressure applicator is provided with the push rod coaxial with push rod; Described battery panel is cuboid, and it is provided with the battery conduit of side opening, and battery conduit one or both ends are provided with pressurization through hole; Described push rod axle center equates to the distance of battery panel lateral wall with the pressurization through hole center of circle with the distance of rectangular cavities rear wall; Two electrodes of described charger are electrically connected with push rod and push rod respectively.
5. ultrathin lithium ion battery formation system according to claim 4, it is characterized in that: in the battery conduit of described battery panel, be equipped with the metal sheeting that some sizes match with battery conduit, each ultrathin lithium ion battery is arranged in the same way and is loaded between each metal sheeting.
6. ultrathin lithium ion battery formation system according to claim 5, it is characterized in that: described metal sheeting one or both sides are provided with boss, the position of boss is corresponding with the position of ultrathin lithium ion battery electrode cream, and the area of area≤negative pole cream of the area≤boss of anodal cream.
7. ultrathin lithium ion battery formation system according to claim 3, is characterized in that: described battery panel is provided with 2 above battery conduits side by side; In each battery conduit, be equipped with the metal sheeting that some intervals arrange and size matches with battery conduit, and the metal sheeting of same position is connected in parallel into metal sheeting group in each battery conduit, adjacent metal compressing tablet group is connected with positive pole and the negative pole of charger respectively; Each is connected in parallel with the anodal metal sheeting group being connected, and the metal sheeting group that each is connected with negative pole is connected in parallel, and is provided with insulating spacer between every two groups of metal sheeting groups; Be provided with battery panel pressing plate in one end of battery conduit, battery panel pressing plate is provided with the pressure head corresponding with each battery conduit, and pressuring machine pushing battery panel pressing plate makes the bottom pushing metal sheeting group of battery panel pressing plate to battery conduit.
8. ultrathin lithium ion battery formation system according to claim 7, it is characterized in that: described battery panel is provided with the elongated slot of side opening, in described elongated slot, being provided with some battery conduit dividing plates that are set up in parallel, is the battery conduit that width is equal between each battery conduit dividing plate; And one end of each battery conduit dividing plate and the sidewall of elongated slot leave the passageway for placing battery dish pressing plate, and the side that described elongated slot is positioned at battery panel pressing plate is provided with pressurization through hole, the push rod of described pressure applicator is through pressurization through hole pushing battery panel pressing plate.
9. ultrathin lithium ion battery formation system according to claim 3, is characterized in that: described pressure applicator is cylinder, air bag, hydraulic cylinder, jack, pneumohydraulic pressure-cylinder, spring, catapult, clip, fixture, weight, screw rod, servomotor or lead screw motor.
10. ultrathin lithium ion battery formation system according to claim 1, is characterized in that: described charger is direct current programmable power supply, programmable power supply, constant voltage supply, constant-current supply, charger, discharges and recharges cabinet, formation cabinet or pulse charger.
11. ultrathin lithium ion battery formation systems according to claim 1, is characterized in that: described pressuring machine has been arranged side by side more than two, or described pressuring machine is stacked arranges more than two.
12. 1 kinds of application rights require the chemical synthesizing method of formation system described in 1, it is characterized in that: comprise following operating procedure:
A. unsealed ultrathin lithium ion battery series, parallel or series-parallel connection after injection electrolyte are loaded into the battery conduit of battery panel;
B. the battery panel that has loaded ultrathin lithium ion battery is installed in pressuring machine;
C. start pressuring machine, with ultrathin lithium ion battery or metal sheeting in the pressure pushing battery panel of setting;
D. open charger, set charge parameter, the ultrathin lithium ion battery in battery panel is charged, the oppressed discharge of gas producing while simultaneously charging;
E. ultrathin lithium ion battery completes after charging, and battery panel is taken out from pressuring machine, then ultrathin lithium ion battery is taken out from battery panel, completes open formation charging first.
13. 1 kinds of ultrathin lithium ion batteries, is characterized in that: this battery applications formation system claimed in claim 1 changes into, and do vacuum seal after changing in dry place, then from dry place, take out do continuous change into, partial volume and check.
14. 1 kinds of ultrathin lithium ion batteries, is characterized in that: the chemical synthesizing method described in this battery applications claim 12 changes into, and do vacuum seal after changing in dry place, then from dry place, take out do continuous change into, partial volume and check.
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