CN103367693B - The dry liquid injection system of lithium battery and dry electrolyte filling method - Google Patents
The dry liquid injection system of lithium battery and dry electrolyte filling method Download PDFInfo
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- CN103367693B CN103367693B CN201310311046.0A CN201310311046A CN103367693B CN 103367693 B CN103367693 B CN 103367693B CN 201310311046 A CN201310311046 A CN 201310311046A CN 103367693 B CN103367693 B CN 103367693B
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- lithium battery
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- electric core
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- 238000002347 injection Methods 0.000 title claims abstract description 110
- 239000007924 injection Substances 0.000 title claims abstract description 110
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 106
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000007788 liquid Substances 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003792 electrolyte Substances 0.000 title claims description 19
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 230000037452 priming Effects 0.000 claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 238000012544 monitoring process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 5
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 239000005955 Ferric phosphate Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229940032958 ferric phosphate Drugs 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 1
- 229910000399 iron(III) phosphate Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Filling, Topping-Up Batteries (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses the drying of a kind of lithium battery, liquid injection system, comprise heater (3), priming device (2), vacuum suction device (4), it is characterized in that described heater comprises the thermal source (32) of two heat conductive rods (31), heating heat conductive rod (31), wherein a heat conductive rod (31) contacts with lithium battery positive electricity pole (11) and heats, and another heat conductive rod (31) contacts with negative electrodes for lithium batteries post (12) and heats; Described priming device (2), vacuum suction device (4) control to be communicated with lithium battery electric core liquid injection port (13) by threeway (6); When vacuum suction device (4) to be communicated with lithium battery electric core liquid injection port (13) carry out vacuumizing operation after carry out drying by heating devices heat lithium battery electric core and process, then open priming device (2) and carry out negative pressure liquid injection operation with being communicated with of lithium battery electric core liquid injection port (13).This device heat drying, water rem oval are high, fluid injection efficiency is high, improve battery core quality and consistency, are applicable to scale lithium ion battery and produce.
Description
Technical field
The invention belongs to lithium ion battery production technical field, be specifically related to the dry liquid injection system of a kind of lithium battery and dry electrolyte filling method.
Background technology
Lithium ion battery has the advantages such as high-energy-density, high output voltage, high-output power, quick charge and low public hazards, and along with popularizing of green energy resource, the range of application of lithium ion battery is more and more extensive, but its safety issue hampers its development always.
Lithium battery is produced, and especially in large-sized power cell production process, battery core, must heat drying before perfusion electrolyte, to reduce battery core internal moisture content, avoids electrolyte and water generation side reaction after fluid injection.The method of existing battery core drying battery core is placed in airtight container, heated, container is vacuumized to the drying realized battery core simultaneously by heating components and parts to container inner wall and gas in container.On the one hand, required heating container volume is comparatively large, and the required energy consumption of heating is also large; On the other hand, closed container is vacuumized, its internal convection medium can be reduced again, obviously reduce heat transfer efficiency, effectively can not heat inside battery barrier film and pole piece, the more difficult eliminating of moisture of the absorption such as battery core inner pole piece, barrier film.
In addition, dried lithium battery electric core is transferred in hothouse or filling machine and again vacuumizes fluid injection again after breaking vacuum, operative employee needs long-term at dry in-house operation, the steam volatilization of human body itself, make fluid injection environment cannot ensure the drying property of stable and consistent, and operative employee is for a long time in dry office work, the physical and mental health impact of the pernicious gas that dry atmosphere and electrolyte volatilize on operative employee is very large; And battery is dry, injection process quality is restive.The present invention therefore.
Summary of the invention
The invention provides the dry liquid injection system of a kind of lithium battery, thus the drying efficiency improved in Production Process of Lithium Battery and fluid injection efficiency, reduce the energy consumption in Production Process of Lithium Battery, improve drying, fluid injection quality, ensure product stability.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
The dry liquid injection system of a kind of lithium battery, comprise heater, priming device, vacuum suction device, it is characterized in that described heater comprises the thermal source of two heat conductive rods, heating heat conductive rod, wherein a heat conductive rod contacts with lithium battery positive electricity pole and heats, and another heat conductive rod contacts with negative electrodes for lithium batteries post and heats; Described priming device, vacuum suction device control to be communicated with by threeway and lithium battery electric core liquid injection port; When vacuum suction device to be communicated with lithium battery electric core liquid injection port carry out vacuumizing operation after carry out drying by heating devices heat lithium battery electric core and process, then open priming device and carry out negative pressure liquid injection operation with being communicated with of lithium battery electric core liquid injection port.
Preferred technical scheme is: described heater also comprises heat pipe, arranges thermal source in described heat pipe, and described thermal source contacts with heat conductive rod and heats; Heat pipe and electrode of lithium cell capital close contact are stretched out in described heat conductive rod one end.
Preferred technical scheme is: described thermal source is electrical heating wire, and described electrical heating wire two ends connect heat conductive rod respectively, the contact position set temperature controller of described heat conductive rod and lithium battery pole.
Preferred technical scheme is: the sealing of described heat pipe, and described thermal source is pass into heat-conducting liquid in heat pipe or heat-conducting gas, the contact position set temperature controller of described heat conductive rod and lithium battery pole.
Preferred technical scheme is: described heat pipe sealing, described thermal source comprises and passes into conduction oil in heat pipe and electrical heating wire, described electrical heating wire is immersed in conduction oil, and two ends connect heat conductive rod respectively, the contact position set temperature controller of described heat conductive rod and lithium battery pole.
Preferred technical scheme is: described system also comprises attemperator, described attemperator comprises adiabatic box, described adiabatic box docks with lithium battery casing, and described heater is arranged in adiabatic box, and described adiabatic box contacts with lithium battery pole by holding out against spring compression heat conductive rod.
Preferred technical scheme is: the connecting interface that described threeway is provided with the vacuum pump interface of vacuum control valve control, the fluid injection interface of fluid injection control valve control and seals with lithium battery electric core liquid injection port; Described vacuum suction device is the vacuum pump be connected with vacuum pump interface, and described vacuum control valve control vacuum pump is communicated with lithium battery electric core liquid injection port; Described priming device is the reservoir be connected with fluid injection interface, and described fluid injection control valve control reservoir is communicated with lithium battery electric core liquid injection port.
Preferred technical scheme is: the vacuum gauge of described vacuum control valve arranged outside monitoring lithium battery in-core vacuum degree; The topping-up pump of described fluid injection control valve arranged outside monitoring priming device reservoir quantity, as HighPower pump.
Another object of the present invention is to provide a kind of dry liquid injection system of described lithium battery that adopts to carry out the dry electrolyte filling method of lithium battery, it is characterized in that said method comprising the steps of:
(1) adopt threeway to control to close being communicated with of priming device and lithium battery electric core liquid injection port, open vacuum suction device and be communicated with lithium battery electric core liquid injection port, carry out vacuumizing operation, the vacuum degree of control battery core inside is-50 arrive-101KPa;
(2) adopt heater to carry out thermal conductivity heat drying to lithium battery, control the temperature of heat conductive rod between 40 ~ 150 DEG C, the time controling of heating was at 0.1 ~ 10 hour;
(3) adopt threeway to control to close vacuum suction device to be communicated with lithium battery electric core liquid injection port, open priming device and carry out battery core fluid injection operation with being communicated with of lithium battery electric core liquid injection port.
Preferred technical scheme is: the vacuum degree controlling battery core inside in described method step (1) is-70 to-99Kpa; Temperature control 60-90 degree in step (2), time 2-4 hour, controls dry rear lithium battery in-core moisture and is less than 100ppm.
Technical solution of the present invention achieves the efficient heat drying of lithium battery and electrolyte filling method, and described method realizes drying to battery and dried electrolyte filling object by the dry liquid injection system of special lithium battery.The dry liquid injection system of lithium battery comprises heater, attemperator, vacuum suction device and priming device.
Described heater comprises heat conductive rod, thermal source and temperature controller.Heat conductive rod select thermal conductivity higher and corrosion-resistant metal as the making such as nickel-clad copper or aluminium, top-closed structure is adopted to contact with battery core positive and negative terminals, utilize the battery core collector metal forming be connected with the direct ohm of positive and negative terminals that heat is directly conducted to battery core inside, improve the efficiency of heating surface of battery core; Described thermal source adopts resistance wire direct electro heating, or logical vapours, hot water or the deep fat heating in heat pipe inside, and deep fat heat pipe built-in resistor silk also can be adopted to heat; Thermal source is directly connected with heat conductive rod, carry out thermal conductivity heating to heat conductive rod, and the temperature being controlled heat conductive rod by temperature controller is between 40 ~ 150 DEG C, and the time controling of heating was at 0.1 ~ 10 hour.
Described attemperator adopts and makes with battery case same material (as ABS, PE plastics etc.), to heating region insulation, reduces thermal loss as much as possible, reduces energy consumption.Described vacuum suction device directly carries out vacuum to battery core by battery core liquid injection port and draws gas, and to guarantee that battery core inside is in negative relative state, vacuum degree is-50 to-101KPa.Described priming device is the reservoir be communicated with threeway, is specifically as follows electrolyte reservoir vessel (as stainless steel storage tank).
Priming device and vacuum suction device share a threeway (being generally acid and alkali-resistance metal, pottery or macromolecular material), threeway three one of them interfaces of interface (connecting interface) insert battery core liquid injection port, an interface (vacuum pump interface) connects vacuum suction device, and last interface (fluid injection interface) connects priming device.Described threeway is provided with two valves: vacuum control valve, fluid injection control valve.After battery core heat drying terminates, switching three-way valve, is communicated with liquid injection port with priming device, utilizes battery core internal negative pressure state, electrolyte (5 ~ 7g/Ah) quantitative in priming device is directly sucked battery core inside by battery core liquid injection port, completes battery core fluid injection; After completing battery core drying, fluid injection, in a dry environment to battery core pressure release, sealing.
Threeway with valve and heater, attemperator are fixed as one.Because vacuum suction device is bled generation vacuum, heat conductive rod self-priming holds out against and directly contacts with battery plus-negative plate post.
Principle of the present invention is that the metal (as copper or aluminium) utilizing thermal conductivity higher directly contacts with battery copper, aluminium pole, directly heat battery core inner Copper Foil, aluminum foil current collector, positive/negative plate and barrier film by heat transfer, by battery core liquid injection port the direct vacuum of battery core drawn gas simultaneously thus reach the object that battery core drying dewaters; After dry water removal phase completes, utilize the negative pressure state of battery core inside, quantitative electrolyte is directly sucked battery core inside by battery core liquid injection port, complete battery core electrolyte filling.
The present invention relates to a kind of drying of lithium battery, electrolyte filling method, be applied to the battery core drying before lithium battery perfusion electrolyte and dried fluid injection.
Heat conductive rod is preferably metal heat-conduction bar.Preferably, the metallic copper that metal heat-conduction bar selects thermal conductivity higher or aluminum are done, and adopt top-closed structure to contact, utilize collector metal forming heat to be directly conducted to battery core inside and heat with battery core positive and negative terminals, improve the efficiency of heating surface.
Relative to the scheme of prior art, advantage of the present invention is:
It is inner that technical solution of the present invention adopts direct thermal contact conductance formula to heat battery core, directly connects battery core inner vacuum to draw gas drying by liquid injection port; Electrolyte is directly sucked battery core inside by recycling battery core internal negative pressure; the drying of the battery core that linked up, fluid injection two battery core production critical processes; heat drying, water rem oval are high, fluid injection efficiency is high; solve drying process and fluid injection operation workshop in current production technology drop into high, use cost is high, human body is had to injury and can not ensure the problems of crucial dry, fluid injection process quality; significantly reduce input cost and operating cost; improve battery core quality and consistency, be applicable to scale lithium ion battery and produce.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the structural representation of the dry liquid injection system of embodiment of the present invention lithium battery;
Fig. 2 is another structural representation of the dry liquid injection system of embodiment of the present invention lithium battery;
Fig. 3 is the structural representation of the dry liquid injection system threeway of embodiment of the present invention lithium battery.
Wherein 2 is priming device; 4 is vacuum vapor extraction device; 6 is threeway; 11 is battery core positive terminal; 12 is battery core negative terminal; 13 is lithium battery electric core liquid injection port; 14 is battery core positive plate; 15 is battery core negative plate; 16 is electric core membrane; 17 is battery container; 31 is heat conductive rod (metal); 32 is thermal source (electrical heating wire); 33 is heat pipe; 34 is temperature controller; 51 is adiabatic box; 52 for holding out against spring; 61 is vacuum pump interface; 62 is fluid injection interface; 63 is connecting interface; 64 is vacuum control valve; 65 is fluid injection control valve; 66 is vacuum gauge; 67 for controlling the topping-up pump of reservoir quantity.
Embodiment
Below in conjunction with specific embodiment, such scheme is described further.Should be understood that these embodiments are not limited to for illustration of the present invention limit the scope of the invention, all equivalent transformations of doing according to Spirit Essence of the present invention or modification, all should be encompassed within protection scope of the present invention.The implementation condition adopted in embodiment can do further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in normal experiment.
Embodiment
Be the described dry liquid injection system of lithium battery as shown in Figures 1 to 3, comprise heater, priming device 2, vacuum suction device 4 and attemperator, described heater comprises the thermal source 32 of two heat conductive rods 31, heating heat conductive rod 31, wherein a heat conductive rod 31 contacts with lithium battery positive electricity pole 11 and heats, and another heat conductive rod 31 contacts with negative electrodes for lithium batteries post 12 and heats; Described priming device 2, vacuum suction device 4 control to be communicated with lithium battery electric core liquid injection port 13 by threeway 6; When vacuum suction device 4 to be communicated with lithium battery electric core liquid injection port 13 carry out vacuumizing operation after carry out drying by heating devices heat lithium battery electric core and process, then open priming device 2 and carry out negative pressure liquid injection operation with being communicated with of lithium battery electric core liquid injection port 13.
Described heater also comprises heat pipe 33, arranges thermal source 32 in described heat pipe 33, and described thermal source 32 contacts with heat conductive rod 31 and heats; Described heat conductive rod 31 one end is stretched out heat pipe 33 and is held out against with lithium battery pole 11,12 and contact.Described heat pipe sealing, described thermal source comprises and passes into conduction oil in heat pipe 33 and electrical heating wire, described electrical heating wire is immersed in conduction oil, and two ends connect heat conductive rod 31 respectively, the contact position set temperature controller 34 of described heat conductive rod 31 and lithium battery pole.
Described attemperator comprises adiabatic box 51, and described adiabatic box 51 docks with lithium battery casing, and described heater is arranged in adiabatic box 51, and described adiabatic box 51 compresses heat conductive rod 31 contact with lithium battery pole by holding out against spring 52.
The connecting interface 63 that described threeway 6 is provided with the vacuum pump interface 61 of vacuum control valve 64 control, the fluid injection interface 62 of fluid injection control valve 65 control and seals with lithium battery electric core liquid injection port 13; Described vacuum suction device is the vacuum pump be connected with vacuum pump interface 61, and described vacuum control valve 64 controls being communicated with of vacuum pump and lithium battery electric core liquid injection port 13; Described priming device 2 is the reservoir be connected with fluid injection interface 62, and described fluid injection control valve 65 controls being communicated with of reservoir and lithium battery electric core liquid injection port 13.The vacuum gauge 66 of described vacuum control valve 64 arranged outside monitoring lithium battery in-core vacuum degree; Described fluid injection control valve 65 arranged outside controls the topping-up pump 67 of reservoir quantity.
According to following steps when carrying out the dry fluid injection of lithium battery:
(1) adopt threeway 6 to control to close being communicated with of priming device 2 and lithium battery electric core liquid injection port 13, open vacuum suction device 4 and be communicated with lithium battery electric core liquid injection port 13, carry out vacuumizing operation, the vacuum degree of control battery core inside is-50 arrive-101KPa.
(2) adopt heater to carry out thermal conductivity heat drying to lithium battery, control the temperature of heat conductive rod between 40 ~ 150 DEG C, the time controling of heating was at 0.1 ~ 10 hour; Control dry rear lithium battery in-core moisture and be less than 100ppm.
(3) adopt threeway 6 to control to close vacuum suction device 4 to be communicated with lithium battery electric core liquid injection port 13, open priming device 2 and carry out battery core fluid injection operation with being communicated with of lithium battery electric core liquid injection port 13.
The dry fluid injection of the square ferric phosphate lithium cell of application examples 100Ah
The good lithium battery of the adiabatic lid of step 1 attemperator, extraction steam pipe inserts threeway vacuum pump interface, and three-way valve switches battery core liquid injection port and is communicated with vacuum pump interface;
Step 2 dynamic vacuum draws gas, and vacuum degree keeps-70 to-99Kpa;
Step 3 electrified regulation positive and negative terminals, temperature control 60-90 degree, time 2-4 hour;
Step 4 inspects battery core by random samples, and positive pole, negative pole, barrier film moisture all require to be less than 100ppm;
Step 5 switching three-way valve, be communicated with battery core liquid injection port and priming device (prestore 600g electrolyte), electrolyte is all sucked battery core inside by negative pressure;
Step 6, in dry environment, shifts out attemperator, tightens safety valve in battery core liquid injection port;
Step 7 battery core delivers to formation process.
Above the method for the dry liquid injection system of a kind of lithium battery provided by the present invention and dry fluid injection thereof is described in detail and has been introduced.Above-mentioned example, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalent transformations of doing according to Spirit Essence of the present invention or modification, all should be encompassed within protection scope of the present invention.
Claims (9)
1. the dry liquid injection system of lithium battery, comprise heater, priming device (2), vacuum suction device (4), it is characterized in that described heater comprises the thermal source (32) of two heat conductive rods (31), heating heat conductive rod (31), wherein a heat conductive rod (31) contacts with lithium battery positive electricity pole (11) and heats, and another heat conductive rod (31) contacts with negative electrodes for lithium batteries post (12) and heats; Described priming device (2), vacuum suction device (4) control to be communicated with lithium battery electric core liquid injection port (13) by threeway (6); When vacuum suction device (4) to be communicated with lithium battery electric core liquid injection port (13) carry out vacuumizing operation after carry out drying by heating devices heat lithium battery electric core and process, then open priming device (2) and carry out negative pressure liquid injection operation with being communicated with of lithium battery electric core liquid injection port (13).
2. the dry liquid injection system of lithium battery according to claim 1, it is characterized in that described heater also comprises heat pipe (33), arrange thermal source (32) in described heat pipe (33), described thermal source (32) contacts with heat conductive rod (31) and heats; Described heat conductive rod (31) one end is stretched out heat pipe (33) and is held out against with lithium battery pole (11,12) and contact.
3. the dry liquid injection system of lithium battery according to claim 2, it is characterized in that described thermal source is electrical heating wire, described electrical heating wire two ends connect heat conductive rod (31) respectively, contact position set temperature controller (34) of described heat conductive rod (31) and lithium battery pole.
4. the dry liquid injection system of lithium battery according to claim 2, it is characterized in that described heat pipe seals, described thermal source for passing into heat-conducting liquid in heat pipe (33) or heat-conducting gas, contact position set temperature controller (34) of described heat conductive rod (31) and lithium battery pole.
5. the dry liquid injection system of lithium battery according to claim 2, it is characterized in that described heat pipe seals, described thermal source comprises and passes into conduction oil in heat pipe (33) and electrical heating wire, described electrical heating wire is immersed in conduction oil, and two ends connect heat conductive rod (31) respectively, contact position set temperature controller (34) of described heat conductive rod (31) and lithium battery pole.
6. the dry liquid injection system of lithium battery according to claim 2, it is characterized in that described system also comprises attemperator, described attemperator comprises adiabatic box (51), described adiabatic box (51) is docked with lithium battery casing (17), described heater is arranged in adiabatic box (51), and described adiabatic box (51) contacts with lithium battery pole by holding out against spring (52) compression heat conductive rod (31).
7. the dry liquid injection system of lithium battery according to claim 2, the connecting interface (63) that it is characterized in that vacuum pump interface (61) that described threeway (6) is provided with vacuum control valve (64) and controls, fluid injection interface (62) that fluid injection control valve (65) controls and seal with lithium battery electric core liquid injection port (13); Described vacuum suction device is the vacuum pump be connected with vacuum pump interface (61), and described vacuum control valve (64) control vacuum pump is communicated with lithium battery electric core liquid injection port (13); Described priming device (2) is the reservoir be connected with fluid injection interface (62), and described fluid injection control valve (65) control reservoir is communicated with lithium battery electric core liquid injection port (13).
8. the dry liquid injection system of lithium battery according to claim 7, is characterized in that the vacuum gauge (66) of described vacuum control valve (64) arranged outside monitoring lithium battery in-core vacuum degree; The topping-up pump (67) of described fluid injection control valve (65) arranged outside monitoring priming device reservoir quantity.
9. adopt the dry liquid injection system of lithium battery according to claim 1 to carry out the dry electrolyte filling method of lithium battery, it is characterized in that said method comprising the steps of:
(1) threeway (6) is adopted to control to close priming device (2) and being communicated with of lithium battery electric core liquid injection port (13), open vacuum suction device (4) to be communicated with lithium battery electric core liquid injection port (13), carry out vacuumizing operation, the vacuum degree controlling battery core inside is-50 to-101KPa;
(2) heater is adopted to carry out thermal conductivity heat drying to lithium battery, control the temperature of heat conductive rod between 40 ~ 150 DEG C, the time controling of heating was at 0.1 ~ 10 hour, and after controlling drying, lithium battery core inner positive/negative plate and diaphragm material moisture are less than 100ppm;
(3) adopt threeway (6) to control to close vacuum suction device (4) to be communicated with lithium battery electric core liquid injection port (13), unlatching priming device (2) is communicated with lithium battery electric core liquid injection port (13), carries out translation interface and completes battery core fluid injection operation.
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| CN106159187B (en) * | 2016-08-25 | 2019-01-29 | 大连中比动力电池有限公司 | Battery liquid-filling device and its electrolyte filling method with heating function |
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| CN106784592B (en) * | 2017-01-25 | 2019-05-28 | 天津清源电动车辆有限责任公司 | A kind of soft-package battery liquid injection system and electrolyte filling method |
| CN107959047B (en) * | 2017-12-25 | 2018-10-23 | 北京乐华锂能科技有限公司 | A kind of soft package lithium battery and soft package lithium battery water-eliminating method |
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| CN202662706U (en) * | 2012-05-23 | 2013-01-09 | 宁德新能源科技有限公司 | Vacuum filling machine for lithium ion battery |
| CN102906519A (en) * | 2010-05-17 | 2013-01-30 | 日产自动车株式会社 | Drying method and drying device |
| CN203415651U (en) * | 2013-07-23 | 2014-01-29 | 恒正科技（苏州）有限公司 | Dry lithium battery liquid filling system |
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| JPH08273659A (en) * | 1995-04-03 | 1996-10-18 | Toshiba Corp | Method and apparatus for impregnating electrolytic solution |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201038227Y (en) * | 2007-04-28 | 2008-03-19 | 比亚迪股份有限公司 | Battery vacuum liquid injection device |
| CN102906519A (en) * | 2010-05-17 | 2013-01-30 | 日产自动车株式会社 | Drying method and drying device |
| CN202662706U (en) * | 2012-05-23 | 2013-01-09 | 宁德新能源科技有限公司 | Vacuum filling machine for lithium ion battery |
| CN203415651U (en) * | 2013-07-23 | 2014-01-29 | 恒正科技（苏州）有限公司 | Dry lithium battery liquid filling system |
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