CN100395904C - Process and device for cell pole piece pressurization and injection - Google Patents
Process and device for cell pole piece pressurization and injection Download PDFInfo
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- CN100395904C CN100395904C CNB2004100273965A CN200410027396A CN100395904C CN 100395904 C CN100395904 C CN 100395904C CN B2004100273965 A CNB2004100273965 A CN B2004100273965A CN 200410027396 A CN200410027396 A CN 200410027396A CN 100395904 C CN100395904 C CN 100395904C
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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 present invention relates to a pressurization and injection method, and a pressurization and injection apparatus thereof for battery pole pieces. A battery comprises a shell with an injection hole, and pole pieces arranged in the shell. The injection method comprises the following procedure that A) the injection hole of the battery is communicated with a liquid container, and is fixedly and stably connected; B) the battery and the liquid container are arranged in a vacuum chamber, and the vacuum chamber is evacuated; C) the evacuation stops after the vacuum degree in the vacuum chamber reaches a certain value, and then, dry air or inert gas is injected in the vacuum chamber; D) the vacuum chamber is continuously pressurized until the air pressure in the vacuum chamber rises to a proper high pressure value, and keeps the pressure for a period of time; E) the high pressure in the vacuum chamber is released, and the battery after pressurization and injection is taken out from the vacuum chamber. The present invention can furthest improve the humectation effect of electrolytic solution on the pole pieces, and avoids long-time static humectation simultaneously.
Description
[technical field]
The present invention relates to a kind of ion battery, more particularly, the present invention relates to a kind of process and preparation facilities thereof of ion battery preparation.
[background technology]
Ion battery is representative with the lithium ion battery, is becoming important requisite Power Supply fittings on the communication products such as mobile phone, mobile DVD, palmtop PC day by day,
The ion battery of high power capacity ratio especially becomes the important accessory that communication products such as mobile phone provide the energy as lithium ion battery; the core of lithium battery then is electric core; the electricity core is made up of electrode, electrolyte etc., the outside by housing, cover plate to finalized the design and protected, have liquid injection hole on housing or the cover plate.Lithium ion battery generally adopts quad flat shape or circular cylindrical shell body structure at present, and shell material is generally stainless steel or aluminium, because the trend of 3G, 4G cell phone and other communication electrical equipment multifunction is more and more obvious on the market, so the capacity that requires lithium ion battery to have must be higher, specific capacity than box hat battery is bigger, Deformation Properties of Al is better, so the market trend of aluminum hull lithium battery is more good and aluminum-shell battery has.But it is that the packed density of electric core is increasing that higher capacity causes thing that electric in-core adorns more and more often, this has just increased the wetting difficulty of electric in-core electrolyte to pole piece to a certain extent, thereby and the wetting high low degree of pole piece will cause the polarization quality degree of electric core when changing into to influence the power capacity size of electric core.And current most battery technology all is to adopt vacuum fluid injection process.
Technological document in this regard such as application number are preparation method and the battery obtained by this method that 03137057.8 Chinese patent file discloses a kind of pocket type lithium ion battery.Its pocket type lithium ion battery is made up of the plastic-aluminum combined film package bag, positive plate, negative plate, barrier film, lug and the electrolyte that have groove, the preparation method of pocket type lithium ion battery by preparation moulding, the battery liquid-filling of the preparation of the forming of battery container, both positive and negative polarity pole piece, battery, technology such as seal, change into and form, wherein, in the sealing process, after battery being carried out vacuumize and injecting organic electrolyte, battery is carried out the 3rd limit vacation to seal, and then battery changed into, carry out vacuum heat-sealing mouth at last, form complete battery.It is said: the false sealing process that it adopted has been avoided the influence to battery performance and electrolyte of extraneous aqueous vapor and oxygen effectively, made full use of electrolyte, improved the utilance of cell active materials, avoided the influence of the gas that produces in the initial battery formation process battery performance.And simple to operate, not high to environmental requirement, can reduce battery cost, adopt this process can prepare the lithium ion battery of difformity, different-thickness simultaneously.The pocket type lithium ion battery of producing by this process have the energy density height, in light weight, volume of battery is little, can heavy-current discharge, the characteristics of good cycle, the security performance of battery also is improved simultaneously.But above-mentioned technical scheme only is mentioned to the technical process notion of battery being carried out vacuumize and injection organic electrolyte, does not further disclose its detailed step and relevant device.
In addition, the similar techniques file please number be that 02134461.2 Chinese patent file discloses a kind of secondary lithium battery opening malleation chemical synthesizing method and comprises: will annotate electrolyte and through the battery of ageing, with gummed paper liquid injection hole is sealed, be put into and discharge and recharge cashier's office in a shop, carry out little electric current constant current charge with 0.01C～1C, again with the big electric current constant current charge of 0.05C～10C, 30 ℃～80 ℃ ageing 0.5-160 hour; In its fluid injection step, this technology is cut into suitable size according to the battery of different model with positive and negative plate, be wound into electric core with barrier film, the spot welding lug is put into battery case again, with shell and cover plate package sealing with laser, inject electrolyte then, be placed on ageing in the inert atmosphere.It is said: make battery with its chemical synthesizing method; Improve lithium ion battery and discharged and recharged technology, parameter and mouth-sealing method, improved battery capacity, reduced inflatable danger, but extending battery life.Similarly, above-mentioned technical scheme only is mentioned to the technology notion of injecting electrolyte, does not also further disclose its detailed step and relevant device thereof.
In production reality, the electrolyte filling method of the manufacturer of most of lithium-ion electric cores all is that electrolyte is injected into earlier on the subsidiary band liquid container of certain anchor clamps basically, again battery is placed and be placed on the gas discharge that vacuumizes in the vaccum-pumping equipment electric in-core in the anchor clamps, simultaneously, electrolyte in the liquid container of anchor clamps flows to electric in-core under the effect of gravity, and then the electric core after the fluid injection is placed under the environment of dry air and leaves standstill a period of time so that the pole piece of electric in-core can be further wetting.The method can make pole piece wetting preferably to the less electric core of the less and/or electric core packed density of pole piece compacted density; If but electric core packed density is big and/or the pole piece compacted density is bigger, the wetting effect of then electric in-core pole piece is unsatisfactory.Because when packed density is big, distance between pole piece and the pole piece can be very little, so the passage that electrolyte enters between electric in-core pole piece is very little, having only just might be wetting with pole piece through the electrolyte of longer time electricity in-core, but the oversize interference and the influence that might make electric core be subjected to external environment condition (especially moisture) of wet processes, and because the surface energy difference of pole piece and electrolyte different, time expand, still may not necessarily guarantee the abundant wetting effect of pole piece merely.If pole piece is wetting bad, analyse the irreversible capacity that lithium produces electric core thereby change into the excessive pole piece that may cause of time electricity core polarization, reduce effective power capacity of battery.
[summary of the invention]
At the above-mentioned shortcoming of prior art, the technical purpose that the present invention will reach is to provide a kind of electrolyte that can increase to greatest extent that the wetting effect of pole piece is avoided leaving standstill for a long time simultaneously wetting battery pole piece pressurized liquid injection method and pressurized liquid injection device thereof again.
For this reason, technical scheme of the present invention is a kind of battery pole piece pressurized liquid injection method, this battery comprises the housing of being with liquid injection hole and the pole piece of interior dress thereof, described injection process comprises the steps: A) with the liquid injection hole of battery with contain that the liquid device is connected and affixed firm, B) battery is placed in the vacuum chamber and vacuumizes together with containing the liquid device, C) stop to vacuumize after reaching certain vacuum degree value when vacuum is indoor, then in vacuum chamber, inject dry air or inert gas, D) continue pressurization after the vacuum chamber internal gas pressure rises to suitable high-voltage value, constant voltage a period of time, E) remove the vacuum chamber inner high voltage, in vacuum chamber, take out the battery that obtains pressurized liquid injection.The principle of process of the present invention is as follows: because electric core filling thing is more, the electrolyte major part is that the top that rests on electric core is near the liquid injection hole during electric core vacuum pumping liquid injection.After in vacuum, the gas of inside battery being released, the air pressure of inside battery drops to very low, owing to still have more electrolyte to rest on the liquid injection hole aspect, therefore inside battery still remains on negative pressure state, at this moment, the increase sharply gas pressure of vacuum chamber just can be set up the High Pressure Difference non-equilibrium state that is higher than the inside battery negative pressure in the outside of battery; Under the non-equilibrium state of this High Pressure Difference, outside hyperbar can quicken the flowing velocity of liquid injection hole aspect electrolyte to battery core body inside significantly.At this moment in vacuum chamber, charge into greater than 1 atmospheric drying or inert gas, the gas of certain volume is along with the compression pressure of volume constantly increases, under the effect of electrolyte at pressure at electric core liquid injection hole place, be forced to help electrolyte and enter better between pole piece and the pole piece toward current downflow.Again because gaseous mass is light and the residue gas of volume big (liquid of Unit Weight and gas are relatively) so inside battery depths is known from experience owing to the continuous inflow of electrolyte has to up walk, finally discharge from the liquid injection hole of electric core, and this also helps injecting more electrolyte in electric core, helps pole piece more by the electrolyte quick humidification.
For realizing the inventive method, the present invention takes following concrete corrective measure: in described steps A) in, described battery and described Sheng liquid device all are assemblied on the same anchor clamps by activity.Described step C) in, described certain vacuum degree value is-0.06Mpa～-0.10Mpa, preferred vacuum degree value is-0.096Mpa.At described step D) in, described suitable high-voltage value is 1.5～2.5Mpa, preferred high-voltage value is 2.0Mpa.Described constant voltage time is 1.5～2.5 minutes, and preferred constant voltage time is 2.0 minutes.
With technique scheme be closely connected for another technical scheme of the present invention promptly: the battery pole piece pressurized liquid injection device that a kind of above-mentioned battery pole piece pressurized liquid injection method is adopted, described battery comprises the housing of being with liquid injection hole and the pole piece of interior dress thereof, and described pressurized liquid injection device comprises vacuum chamber, offers the port that is communicated with supercharging device on the described vacuum-chamber wall; Described pressurized liquid injection device also comprises the anchor clamps of the described battery of clamping, and described anchor clamps are provided with the Sheng liquid device of splendid attire electrolyte, and described Sheng liquid device bottom offers the pipeline of the liquid injection hole that is communicated with described battery.
For further strengthening the function of the inventive method, the present invention takes following concrete corrective measure:
Process for convenience the battery of a plurality of various sizes types simultaneously, between described anchor clamps and the described Sheng liquid device for removably connecting.The clamping length scalable of described anchor clamps, described anchor clamps are provided with a plurality of Sheng liquid devices and connect position and syndeton.
This device realizes having two kinds of enforcement approach: in first kind of approach, described supercharging device comprises high-pressure air source, is communicated with by breather line between this high-pressure air source and described vacuum chamber.
The equipment that need use can comprise: vacuator, vacuum chamber, breather line, greater than 1 atmospheric high-pressure air source.Its course of work is: the electric core of having annotated electrolyte is placed on the door that shuts vacuum chamber in the vacuum chamber together with anchor clamps starts vacuator vacuum chamber is vacuumized, the valve open that will connect vacuum chamber and high-pressure air source after vacuumizing is put into dry gas in the vacuum chamber more than the air pressure of vacuum chamber is greater than 1 big voltage.
In second kind of approach, described supercharging device comprises aerostatic press, and described vacuum chamber is the cylinder chamber of this aerostatic press, also offers on this cylinder locular wall and vacuumizes gas port and air inlet.
The equipment that need use has: vacuator, the vacuum chamber that has piston, the motor that promotes piston or hydraulic pump, dry gas or indifferent gas source of the gas, breather line.Its course of work is: the electric core of having annotated electrolyte is placed on the door that shuts vacuum chamber in the vacuum chamber together with anchor clamps starts vacuator vacuum chamber is vacuumized, vacuumize the back and in vacuum chamber, put into a certain amount of dry gas, open the motor or the hydraulic pump that promote piston then the air pressure that the dry gas in the vacuum chamber compresses in vacuum chamber is got final product more than the atmospheric pressure greater than 1.
In a word, battery pole piece pressurized liquid injection device of the present invention helps increasing within a short period of time electrolyte to be entered in the battery between the pole piece and pole piece, strengthens the wetting effect of electrolyte to pole piece, help reducing the gas of electric in-core, help increasing the electrolyte content of electric core.Production practices prove: the battery that the method and apparatus of employing pressurized liquid injection of the present invention is produced than traditional method and apparatus can make the liquid amount of battery increase by 10～20%, and can also have influence on the electrolyte reservation amount that makes in the vacuum encapsulation process step thereafter in the battery increases by 5%～10%.Improvement effect significantly, actively effectively.
Below, with accompanying drawing technical solution of the present invention is described further in conjunction with specific embodiments.
[description of drawings]
Fig. 1 is the structural representation of battery pole piece pressurized liquid injection device embodiment 1 of the present invention.
Fig. 2 is the structural representation of battery pole piece pressurized liquid injection device embodiment 2 of the present invention.。
[embodiment]
Embodiment 1:
A kind of battery pole piece pressurized liquid injection device embodiment 1 as shown in Figure 1, described battery 1 comprises the housing of band liquid injection hole up and the pole piece of interior dress (not detailed showing) thereof, and described pressurized liquid injection device comprises vacuum chamber 2, vacuator (not detailed showing) offers the port 2-0 that is communicated with supercharging device on vacuum chamber 2 walls; Described pressurized liquid injection device also comprises the anchor clamps 3 of clamping battery 1, and anchor clamps 3 are provided with the Sheng liquid device 4 of splendid attire electrolyte, and described Sheng liquid device 4 bottoms offer the pipeline 5 of the liquid injection hole that is communicated with battery 1.
Supercharging device comprises high- pressure air source 6, and 2 of this high-pressure air source 6 and described vacuum chambers are connected by breather line 7 and valve 7-0 thereof;
Apparatus of the present invention embodiment is with the pressurized liquid injection of the battery 1 of electric core 383450A as technical process embodiment promptly: the design reservoir quantity of electric core 383450A is 2.2g, the battery 1 that connects electrolyte Sheng liquid device 4 is placed in the vacuum chamber 2 together with anchor clamps 3, the door that shuts vacuum chamber 2 starts vacuator vacuum chamber 2 is vacuumized, when the vacuum degree in the vacuum chamber 2 be-during 0.096mpa, open with connecting the valve 7-0 of vacuum chamber 2 that to put into dry gas in the vacuum chamber 2 be 2Mpa up to the air pressure of vacuum chamber 2, open vacuum chamber 2 behind the constant voltage 2min and take out battery 1 and get final product with high-pressure air source 6.
Embodiment 2:
A kind of battery pole piece pressurized liquid injection device embodiment 2 as shown in Figure 2, described battery 1 comprises the housing of band liquid injection hole up and the pole piece of interior dress (not detailed showing) thereof, and described pressurized liquid injection device comprises and vacuum chamber 2, vacuator (detailed showing) offers the port 2-0 that is communicated with supercharging device on vacuum chamber 2 walls; Described pressurized liquid injection device also comprises the anchor clamps 3 of clamping battery 1, and described anchor clamps 3 are provided with the Sheng liquid device 4 of splendid attire electrolyte, and described Sheng liquid device 4 bottoms offer the pipeline 5 of the liquid injection hole that is communicated with battery 1.
Supercharging device comprises aerostatic press, aerostatic press comprises motor or the hydraulic pump 8 that promotes piston 2-4, described vacuum chamber 2 is the cylinder chamber of this aerostatic press, piston 2-4 air-tight fit is on these cylinder chamber's 2 walls, also offer vacuum pumping opening 2-0 and air inlet 2-1 on cylinder chamber's 2 walls, by valve 2-2,2-3, bleeding point 2-0 and air inlet 2-1 are connected with vacuator or dry gas or indifferent gas source of the gas (not quite clear showing) respectively.
Apparatus of the present invention embodiment is with the pressurized liquid injection of the battery 1 of electric core 383450A as technical process embodiment promptly: the design reservoir quantity of electric core 383450A is 2.2g, the battery 1 that connects electrolyte Sheng liquid device 4 is placed in the vacuum chamber 2 together with anchor clamps 3, the door that shuts vacuum chamber 2 starts vacuator vacuum chamber 2 is vacuumized, vacuumize back valve-off 2-3, the valve 2-2 that opens dry gas and vacuum chamber junction shuts valve 2-2 after putting into a certain amount of dry gas in the vacuum chamber 2, and opening the motor that promotes piston 2-4 or the dry gas in 8 pairs of vacuum chambers of hydraulic pump 2 then, to compress air pressure in vacuum chamber 2 be to open vacuum chamber 2 behind 2Mpa and the pressurize 2min to take out electric core and get final product.
Claims (10)
1. battery pole piece pressurized liquid injection method, described battery comprises the housing of being with liquid injection hole and the pole piece of interior dress thereof, described injection process comprises the steps: A) with the liquid injection hole of described battery with contain that the liquid device is connected and affixed firm, B) described battery is placed in the vacuum chamber and vacuumizes together with containing the liquid device, C) when the indoor vacuum degree value of vacuum reach-0.06Mpa～-stop to vacuumize behind the 0.10Mpa, then in vacuum chamber, inject dry air or inert gas, D) continue pressurization after the vacuum chamber internal gas pressure rises to 1.5～2.5Mpa high-voltage value, 1.5～2.5 fens clock times of constant voltage, E) remove the vacuum chamber inner high voltage, in vacuum chamber, take out the battery that obtains pressurized liquid injection.
2. battery pole piece pressurized liquid injection method as claimed in claim 1 is characterized in that: in described steps A) in, described battery and described Sheng liquid device all are assemblied on the same anchor clamps by activity.
3. battery pole piece pressurized liquid injection method as claimed in claim 1 or 2 is characterized in that: described step C), described vacuum degree value is-0.096Mpa.
4. battery pole piece pressurized liquid injection method as claimed in claim 3 is characterized in that: at described step D) in, described high-voltage value is 2.0Mpa.
5. battery pole piece pressurized liquid injection method as claimed in claim 3 is characterized in that: at described step D) in, described constant voltage time is 2.0 minutes.
6. battery pole piece pressurized liquid injection device that is adopted as battery pole piece pressurized liquid injection method as described in one of claim 1～5, described battery comprises the housing of being with liquid injection hole and the pole piece of interior dress thereof, it is characterized in that: described pressurized liquid injection device comprises vacuum chamber, offers the port that is communicated with supercharging device on the described vacuum-chamber wall; Described pressurized liquid injection device also comprises the anchor clamps of the described battery of clamping, and described anchor clamps are provided with the Sheng liquid device of splendid attire electrolyte, and described Sheng liquid device bottom offers the pipeline of the liquid injection hole that is communicated with described battery.
7. battery pole piece pressurized liquid injection device as claimed in claim 6, it is characterized in that: described supercharging device comprises high-pressure air source, is communicated with by breather line between this high-pressure air source and described vacuum chamber.
8. battery pole piece pressurized liquid injection device as claimed in claim 6, it is characterized in that: described supercharging device comprises aerostatic press, described vacuum chamber is the cylinder chamber of this aerostatic press, also offers on this cylinder locular wall and vacuumizes gas port and air inlet.
9. battery pole piece pressurized liquid injection device as claimed in claim 6 is characterized in that: between described anchor clamps and the described Sheng liquid device for removably connecting.
10. battery pole piece pressurized liquid injection device as claimed in claim 6 is characterized in that: the clamping length scalable of described anchor clamps, described anchor clamps are provided with a plurality of Sheng liquid devices and connect position and syndeton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100273965A CN100395904C (en) | 2004-06-01 | 2004-06-01 | Process and device for cell pole piece pressurization and injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100273965A CN100395904C (en) | 2004-06-01 | 2004-06-01 | Process and device for cell pole piece pressurization and injection |
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| CN1705147A CN1705147A (en) | 2005-12-07 |
| CN100395904C true CN100395904C (en) | 2008-06-18 |
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| CNB2004100273965A Expired - Fee Related CN100395904C (en) | 2004-06-01 | 2004-06-01 | Process and device for cell pole piece pressurization and injection |
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Cited By (1)
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| EP4216330A1 (en) * | 2022-01-19 | 2023-07-26 | Contemporary Amperex Technology Co., Limited | Formation system |
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| CN1705147A (en) | 2005-12-07 |
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