CN106025145A - Flexible package lithium battery two-seal liquor-drainage exhaust packaging technology - Google Patents
Flexible package lithium battery two-seal liquor-drainage exhaust packaging technology Download PDFInfo
- Publication number
- CN106025145A CN106025145A CN201610646125.0A CN201610646125A CN106025145A CN 106025145 A CN106025145 A CN 106025145A CN 201610646125 A CN201610646125 A CN 201610646125A CN 106025145 A CN106025145 A CN 106025145A
- Authority
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- China
- Prior art keywords
- storage chamber
- sealing
- gas storage
- hot pressing
- end socket
- Prior art date
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- 238000012536 packaging technology Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000007731 hot pressing Methods 0.000 claims abstract description 34
- 238000003860 storage Methods 0.000 claims abstract description 28
- 239000003792 electrolyte Substances 0.000 claims abstract description 12
- 238000001291 vacuum drying Methods 0.000 claims abstract description 8
- 239000012785 packaging film Substances 0.000 claims description 14
- 229920006280 packaging film Polymers 0.000 claims description 14
- 238000009459 flexible packaging Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000000565 sealant Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000005538 encapsulation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 21
- 238000004519 manufacturing process Methods 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 230000000754 repressing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a flexible package lithium battery two-seal liquor-drainage exhaust packaging technology. The technology utilizes a cell, the cell comprises a conduplicate flexible package film, a liquid storage chamber and a gas storage chamber are arranged between the two parts of the conduplicate flexible package film, edges are sealed through top seal and side seal, and the edge at one side of the gas storage chamber is used as an inlet side for feeding an electrolyte. The technology comprises drying the cell in a vacuum drying box, injecting a certain amount of the electrolyte in the vacuum drying box through into an inlet side, carrying out drying vacuum-pumping in the cell, immediately carrying out hot sealing on the inlet side, carrying out heating baking, carrying out formation treatment, thrusting a vacuum-pumping needle into the gas storage chamber under the condition of full sealing, carrying out lithium battery vacuum-pumping, then carrying out double sealing between the liquid storage chamber and the gas storage chamber through two heat seal heads to form a hot-pressing zone and a hot-sealing zone, carrying out heat sealing on the hot-pressing zone, and cutting superfluous parts along the edge subjected secondary heat sealing so that two-seal liquor-drainage exhaust package is finished. The technology realizes fast liquor-drainage and exhaust and improves seal effects.
Description
Technical field
The present invention relates to a kind of lithium battery encapsulation technology, particularly flexible package lithium cell two and seal discharge opeing aerofluxus packaging technology.
Background technology
Due to the particularity of lithium battery material, lithium salts easily hydrolyzes generation Fluohydric acid., and Fluohydric acid. is severe corrosive acid, and boiling point is low, easily becomes hydrogen fluoride gas under room temperature, makes lithium battery flatulence, damages electricity consumption facility (such as mobile phone, notebook computer or even automobile etc.).If then there is the security risk of blast after-combustion in steel body packaging (aluminum hull or box hat packaging), if aluminum plastic film flexible package then to there is sealing softened, electrolyte can corrode electricity consumption facility and there is the security risk of burning after flowing out.
Just because of this, Production Process of Lithium Battery strictly to control moisture content and storage, the degree of drying of production environment of raw and auxiliary material, in any case but control, micro-moisture is always had to enter, hot and humid pressure aging stage in Production Process of Lithium Battery and lithium salts react the Fluohydric acid. producing deep-etching, and hydrogen fluoride gas can be generated, this gas must try every possible means to be eliminated as much as totally, thereby producing because of the two envelope techniques again encapsulated after must puncturing packaging film when bleeding.This two envelopes technique exists two producing more than ten years so far always and is sealed the excessive risk that technology difficulty is high or poorly sealed, the consequence caused: first yield rate is low, its two be just in case flow into user, it is not only the most serious quality problems, and brings damage electrical appliance and the huge security risk of burning most probably.For many years, a big technical barrier of lithium battery manufacturing enterprise is always perplexed in the quality management and control of flexible package lithium cell two envelope.
Having at present percentage of batteries factory and be honored as a queen having carried out two, hot repressing encapsulates once, reduces poorly sealed risk.This operation " two envelopes " poor sealing rate can will should drop to 10PPM from about 100PPM really, but owing to the temperature of packaging by hot pressing again is higher, pressure is bigger, there will be plastic squeeze more serious, mounting portion piled up by glue can be damaged, accelerates electrochemical corrosion, can bring again new hidden danger.
Summary of the invention
The technical problem to be solved in the present invention is for the deficiencies in the prior art, it is proposed that one can quickly realize discharge opeing exhaust effect, and the flexible package lithium cell two being simultaneously greatly promoted sealing effectiveness seals discharge opeing aerofluxus packaging technology.
The technical problem to be solved in the present invention is achieved through the following technical solutions, a kind of flexible package lithium cell two seals discharge opeing aerofluxus packaging technology, including battery core, battery core is by flexible packaging film doubling, reservoir chamber and gas storage chamber it is provided with between two panels flexible packaging film, edge sealing is carried out by closedtop and side seal technique, reserve the entrance limit as note electrolyte, the limit of gas storage chamber side, it is characterized in: (1), above-mentioned battery core is put into vacuum drying oven be dried, quantitative electrolyte is entered from entrance marginal not in vacuum drying oven, and after rapidly to battery core inside evacuation, immediately entrance limit is sealed；
(2), above-mentioned battery core being loaded fixture, temperature-pressure toasts, and carries out chemical conversion treatment, allows all battery materials and environment bring the moisture within battery core into and the most all react with electrolyte, the hydrogen fluoride gas of generation, enters gas storage chamber；
(3), above-mentioned battery core being sent into automatic edge sealing equipment, in the case of hermetic, vacuum probe penetrates at gas storage chamber, and lithium battery is carried out evacuation；
(4), after evacuation, two envelopes are carried out by two groups of heat-sealing heads between reservoir chamber and gas storage chamber, concrete: use hot pressing end socket near reservoir chamber side, heat-sealing end socket is used near gas storage chamber side, the hot pressing temperature of hot pressing end socket is less than the softening point temperature of the internal layer sealant layer of flexible packaging film, the pressure of hot pressing end socket is 0.4-0.6MPa, formed between reservoir chamber and gas storage chamber the district of hot pressing together with together with heat-sealable area；
(5) above-mentioned hot pressing district is sealed again, then dismiss redundance along the edge again sealed, complete two sealing discharge opeing aerofluxus encapsulation.
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, and hot pressing end socket is not less than 0.1 second than heat-sealing end socket advancement.
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, and hot sealing process condition is: temperature 170 DEG C-200 DEG C, time 3-5S, pressure 0.3-0.5MPa.
The technical problem to be solved in the present invention can also be come to realize further by the following technical programs, and the hot pressing temperature of hot pressing end socket is lower than the softening point temperature of the internal layer sealant layer of flexible packaging film 3 ~ 5 DEG C.
The present invention is compared with prior art, can quickly realize discharge opeing exhaust effect, liquids and gases will not be enclosed wherein the most again, it is greatly promoted the sealing effectiveness in this " two envelopes " region, thus solves the big technical barrier that puzzlement flexible package lithium cell manufacturing enterprise " two envelopes " effect is bad for over ten years.Original " two envelopes " fraction defective can be dropped to below 1PPM from 10-100PPM.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention.
Detailed description of the invention
A kind of flexible package lithium cell two seals discharge opeing aerofluxus packaging technology, and including battery core, battery core is by flexible packaging film doubling, reservoir chamber 1 and gas storage chamber 4 it is provided with between two panels flexible packaging film, carry out edge sealing by closedtop and side seal technique, reserve the entrance limit as note electrolyte, the limit of gas storage chamber side
(1), by above-mentioned battery core put into vacuum drying oven to be dried, in vacuum drying oven, enter quantitative electrolyte from entrance marginal not, and rapidly to battery core inside evacuation after, immediately entrance limit is sealed；Hot sealing process condition is: temperature 170 DEG C-200 DEG C, time 3-5S, pressure 0.3-0.5MPa.
(2), above-mentioned battery core being loaded fixture, temperature-pressure toasts, and carries out chemical conversion treatment, allows all battery materials and environment bring the moisture within battery core into and the most all react with electrolyte, the hydrogen fluoride gas of generation, enters gas storage chamber；
(3), above-mentioned battery core being sent into automatic edge sealing equipment, in the case of hermetic, vacuum probe penetrates at gas storage chamber, and lithium battery is carried out evacuation；
(4), after evacuation, two envelopes are carried out by two groups of heat-sealing heads between reservoir chamber and gas storage chamber, concrete: use hot pressing end socket near reservoir chamber side, heat-sealing end socket is used near gas storage chamber side, hot pressing end socket is not less than 0.1 second than heat-sealing end socket advancement, the hot pressing temperature of hot pressing end socket is less than the softening point temperature of the internal layer sealant layer of flexible packaging film, and the pressure of hot pressing end socket is 0.4-0.6MPa, and hot pressing end socket and heat-sealing end socket can rise simultaneously.
Hot pressing end socket is not less than 0.1 second than heat-sealing end socket advancement, hot pressing end socket purpose is exactly beyond the liquids and gases expulsion area as far as possible of the glue surface by the flexible packaging film of two-layer up and down needing heat-sealing to seal, to carry out rapidly following heat-sealing again, hot sealing effect is greatly improved.
Formed between reservoir chamber and gas storage chamber the district of hot pressing together 2 with together with heat-sealable area 3；Hot sealing process condition is: temperature 170 DEG C-200 DEG C, time 3-5S, pressure 0.3-0.5MPa.
(5), again sealing above-mentioned hot pressing district 2, hot sealing process condition is: temperature 170 DEG C-200 DEG C, time 3-5S, pressure 0.3-0.5MPa.Then dismiss redundance along the edge again sealed, complete two sealing discharge opeing aerofluxus encapsulation.
The hot pressing temperature of hot pressing end socket is lower than the softening point temperature of the internal layer sealant layer of flexible packaging film 3 ~ 5 DEG C.
A set of hot pressing end socket need only be increased, as discharge opeing aerofluxus, scrap build or increase investment seldom on original multifunction automatic equipment.Do not affect original production efficiency.
Claims (4)
1. a flexible package lithium cell two seals discharge opeing aerofluxus packaging technology, including battery core, battery core is by flexible packaging film doubling, reservoir chamber and gas storage chamber it is provided with between two panels flexible packaging film, edge sealing is carried out by closedtop and side seal technique, reserve the entrance limit as note electrolyte, the limit of gas storage chamber side, it is characterised in that:
(1) above-mentioned battery core is put into vacuum drying oven be dried, in vacuum drying oven, enters quantitative electrolyte from entrance marginal not, and rapidly to battery core inside evacuation after, immediately entrance limit is sealed；
(2) above-mentioned battery core being loaded fixture, temperature-pressure toasts, and carries out chemical conversion treatment, allows all battery materials and environment bring the moisture within battery core into and the most all react with electrolyte, the gas of generation, enters gas storage chamber；
(3) above-mentioned battery core being sent into automatic edge sealing equipment, in the case of hermetic, vacuum probe penetrates at gas storage chamber, and lithium battery is carried out evacuation；
(4) after evacuation, two envelopes are carried out by two groups of heat-sealing heads between reservoir chamber and gas storage chamber, concrete: use hot pressing end socket near reservoir chamber side, heat-sealing end socket is used near gas storage chamber side, the hot pressing temperature of hot pressing end socket is less than the softening point temperature of the internal layer sealant layer of flexible packaging film, the pressure of hot pressing end socket is 0.4-0.6MPa, formed between reservoir chamber and gas storage chamber the district of hot pressing together with together with heat-sealable area；
(5) above-mentioned hot pressing district is sealed again, then dismiss redundance along the edge again sealed, complete two sealing discharge opeing aerofluxus encapsulation.
Flexible package lithium cell two the most according to claim 1 seals discharge opeing aerofluxus packaging technology, it is characterised in that: hot sealing process condition is: temperature 170 DEG C-200 DEG C, time 3-5S, pressure 0.3-0.5MPa.
Flexible package lithium cell two the most according to claim 1 seals discharge opeing aerofluxus packaging technology, it is characterised in that: hot pressing end socket is not less than 0.1 second than heat-sealing end socket advancement.
Flexible package lithium cell two the most according to claim 1 seals discharge opeing aerofluxus packaging technology, it is characterised in that: the hot pressing temperature of hot pressing end socket is lower than the softening point temperature of the internal layer sealant layer of flexible packaging film 3 ~ 5 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610646125.0A CN106025145B (en) | 2016-08-09 | 2016-08-09 | A kind of sealing of flexible package lithium cell two drain exhaust packaging technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610646125.0A CN106025145B (en) | 2016-08-09 | 2016-08-09 | A kind of sealing of flexible package lithium cell two drain exhaust packaging technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106025145A true CN106025145A (en) | 2016-10-12 |
| CN106025145B CN106025145B (en) | 2018-08-10 |
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| CN201610646125.0A Active CN106025145B (en) | 2016-08-09 | 2016-08-09 | A kind of sealing of flexible package lithium cell two drain exhaust packaging technology |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486629A (en) * | 2016-12-14 | 2017-03-08 | 河北银隆新能源有限公司 | Soft-package battery |
| CN109585899A (en) * | 2018-11-30 | 2019-04-05 | 曙鹏科技（深圳）有限公司 | A kind of battery processing method and battery |
| CN110931878A (en) * | 2019-11-13 | 2020-03-27 | 合肥国轩高科动力能源有限公司 | Packaging method of lithium ion battery |
| CN110993880A (en) * | 2019-12-06 | 2020-04-10 | 镇江成泰自动化技术有限公司 | Soft package lithium ion battery exhaust device and exhaust method |
| CN111403815A (en) * | 2020-03-27 | 2020-07-10 | 惠州亿纬集能有限公司 | Air-extracting and sealing method for soft package lithium battery |
| CN111769218A (en) * | 2020-07-13 | 2020-10-13 | 苏州凌威新能源科技有限公司 | Soft package battery packaging method |
| CN111879618A (en) * | 2020-07-09 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for testing withstand pressure of soft-packaged battery cell |
| CN113851695A (en) * | 2021-08-10 | 2021-12-28 | 宁波维科电池有限公司 | Method for pressurizing and exhausting battery cell by secondary sealing |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106486629A (en) * | 2016-12-14 | 2017-03-08 | 河北银隆新能源有限公司 | Soft-package battery |
| CN109585899A (en) * | 2018-11-30 | 2019-04-05 | 曙鹏科技（深圳）有限公司 | A kind of battery processing method and battery |
| CN110931878A (en) * | 2019-11-13 | 2020-03-27 | 合肥国轩高科动力能源有限公司 | Packaging method of lithium ion battery |
| CN110993880A (en) * | 2019-12-06 | 2020-04-10 | 镇江成泰自动化技术有限公司 | Soft package lithium ion battery exhaust device and exhaust method |
| CN111403815A (en) * | 2020-03-27 | 2020-07-10 | 惠州亿纬集能有限公司 | Air-extracting and sealing method for soft package lithium battery |
| CN111403815B (en) * | 2020-03-27 | 2021-05-25 | 惠州亿纬集能有限公司 | Air-extracting and sealing method for soft package lithium battery |
| CN111879618A (en) * | 2020-07-09 | 2020-11-03 | 合肥国轩高科动力能源有限公司 | Method for testing withstand pressure of soft-packaged battery cell |
| CN111769218A (en) * | 2020-07-13 | 2020-10-13 | 苏州凌威新能源科技有限公司 | Soft package battery packaging method |
| CN113851695A (en) * | 2021-08-10 | 2021-12-28 | 宁波维科电池有限公司 | Method for pressurizing and exhausting battery cell by secondary sealing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106025145B (en) | 2018-08-10 |
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