CN109411825A - For the cold press device and method before two envelope of lithium ion battery - Google Patents
For the cold press device and method before two envelope of lithium ion battery Download PDFInfo
- Publication number
- CN109411825A CN109411825A CN201710700015.2A CN201710700015A CN109411825A CN 109411825 A CN109411825 A CN 109411825A CN 201710700015 A CN201710700015 A CN 201710700015A CN 109411825 A CN109411825 A CN 109411825A
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- Prior art keywords
- cooler
- temperature
- aluminium sheet
- envelope
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 21
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 36
- 239000004411 aluminium Substances 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 15
- 239000000498 cooling water Substances 0.000 claims description 14
- 238000005056 compaction Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 11
- 230000002427 irreversible effect Effects 0.000 abstract description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052744 lithium Inorganic materials 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 17
- 238000005538 encapsulation Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of for for the cold press device and method before two envelope of lithium ion battery, comprising: cooler is made of the identical cooling aluminium sheet of muti-piece；Feeding manipulator, positioned at the top of the cooler；Pressurizer is moved towards by cylinder-driven to cooler both ends, positioned at the both ends of cooler to squeeze cooler；Pressurize plate, is spaced apart in cooler, is used to place battery core between the pressurization plate.By the above-mentioned means, the present invention can be realized automatic liquid-pumping molding, irreversible capacity loss of the lithium battery in charge and discharge process is also reduced, the guarantor's liquid measure, uniform performance and cycle performance of battery is improved, improves the leakproofness of battery.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly, to the cold pressing before a kind of two envelope for lithium ion battery
Device and method.
Background technique
Technique, device category currently used for formation of Li-ion batteries is various, the shadow of chemical synthesis technology and equipment to lithium battery performance
Sound is most important, seriously affects capacity, uniform performance, cycle performance of lithium battery etc., solves and improve encapsulation and cold pressing work
The problem of skill, equipment, is significant.
Existing automatic two envelopes equipment is a kind of simple sealed in unit, is had the drawback that
1, temperature drift when because of encapsulation, diffusion rate is high, so electrolyte is easy to be extracted in vacuum when two envelopes,
Technique requirement cannot be reached by causing battery to protect liquid measure, seriously affect the cycle performance of battery；
2, electrolyte diffusion rate is high, and excessive electrolyte is pumped to secondary encapsulation position in vacuum, leads to sealing part
The encapsulation factor such as temperature is changed, and cannot be reached encapsulation requirement or sealing part by electrolytic corrosion, be influenced the leakproofness of battery, lead
Pond is sent a telegraph to scrap；
3, in formation process, many side reactions occur for inside battery, generate CO2Equal exhaust gas, are present in electricity in the form of bubble
Between pole and diaphragm, battery electrode flatness is influenced, causes the ion-exchanging efficiency between electrode to be severely impacted, influences electricity
The uniform performance and capacity in pond.
Summary of the invention
The technical problems to be solved by the present invention are: cold press device and side before providing a kind of two envelope for lithium ion battery
Method realizes automatic liquid-pumping molding, also reduces irreversible capacity loss of the lithium battery in charge and discharge process, improve battery
Liquid measure, uniform performance and cycle performance are protected, the leakproofness of battery is improved.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: provide a kind of for lithium ion battery two
Cold press device before envelope, comprising:
Cooler is made of the identical cooling aluminium sheet of muti-piece；
Feeding manipulator, positioned at the top of the cooler；
Pressurizer is moved towards by cylinder-driven to cooler both ends, positioned at the both ends of cooler to squeeze cooler；
Pressurize plate, is spaced apart in cooler, is used to place battery core between the pressurization plate.
Wherein, the cooling aluminium sheet has 25.
Wherein, circulation waterway is equipped in every cooling aluminium sheet, and the circulation waterway between the aluminium sheet that cools down is in parallel.
Wherein, aluminium sheet guide rail is equipped in the cooler, for connecting the pressurization plate.
Wherein, one end of the cooler is equipped with cylinder air inlet pipeline, and the other end is equipped with cooling water pipeline.
Wherein, the pressurizer connects the cylinder air inlet pipeline.
In order to solve the above-mentioned technical problem, the present invention also provides the cold compaction process before a kind of two envelope for lithium ion battery,
Include the following steps:
S1: starting cold press device, and system is initialized, read the temperature of cooling aluminium sheet；
S2: whether the temperature of upper computer detection cooling aluminium sheet is the first temperature,
If so, thening follow the steps S3；
Conversely, thening follow the steps S30: the temperature of display screen display cooling aluminium sheet, and start circulation waterway and cooled down；
Whether S3: having battery core between upper computer detection pressurization plate,
If so, thening follow the steps S4；
Conversely, thening follow the steps S40: PC control feeding manipulator clamping battery core is put into pressurization plate, and return step
S3；
S4: whether the temperature of upper computer detection cooling aluminium sheet cools to second temperature,
If so, thening follow the steps S5；
Conversely, thening follow the steps S50: acquiring temperature, pressure information in cold press device, PC control by data acquisition circuit
Cooling water flow；
S5: upper computer detection temperature fall time whether be in the cooling time of section,
If so, terminating process；
Conversely, thening follow the steps S6: the cooling water flow that PC control cools down in aluminium sheet, to control cooling rate.
It wherein, further include step S0 before step S1: preset first temperature, second temperature and section cooling time.
The beneficial effects of the present invention are: it is different from the prior art, present invention cooling aluminium sheet cools down, and reaches in temperature
To after the first setting value, by pressurizer pressure pressurization plate, and further uniformly press onto battery core, realization cold pressing.Pass through
Aforesaid way, the present invention can reduce electrolyte migration rate, and in wherein drawing liquid forming process, reduce the extraction of electrolyte,
It improves and protects liquid measure, can guarantee the cycle performance of battery；And it is cold-pressed and can guarantee cell package, it is ensured that battery sealing-performance, discharge electricity
The gas generated in the formation process of pond improves cycle performance and the uniform performance of charge and discharge irreversible capacity loss and battery.
Detailed description of the invention
Fig. 1 is the present invention for the cold press device structural schematic diagram before two envelope of lithium ion battery；
Fig. 2 is the structural schematic diagram of cooling piece in Fig. 1；
Fig. 3 is the circulation waterway schematic diagram in Fig. 2 in cooling piece；
Fig. 4 present invention is used for the flow diagram of the cold compaction process before two envelope of lithium ion battery.
Specific embodiment
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached
Figure is explained.
Please refer to Fig. 1 ~ Fig. 3, the present invention provides the cold press device before a kind of two envelope for lithium ion battery, comprising:
Cooler 1, by 25 identical cooling aluminium sheet 11(201 ~ 225) it forms, circulation waterway is equipped in every cooling aluminium sheet 11,
And the circulation waterway between the aluminium sheet 11 that cools down is in parallel,
Feeding manipulator 2 is put into cooler 1 positioned at the top of the cooler 1 for clamping battery core；
Pressurizer 3 is moved towards by cylinder-driven to 1 both ends of cooler, positioned at the both ends of cooler 1 to squeeze cooler
1；Specifically, pressurizer is pressure control cylinder-driven grip device, and pressurization makes the exhaust gas discharge electricity that chemical conversion generates inside battery core
It in pole surface or diaphragm, is stored in airbag, during pumping drawing liquid below, extracts battery core post package out；
Pressurize plate 4, is spaced apart in cooler 1, for placing battery core 10 between the pressurization plate 4, is mainly
Battery core provides uniform face pressure, squeezes the bubble in battery core.
After quiescence in high temperature, battery core clamping is put between pressurization plate, starting by battery core under the operation of feeding manipulator
Cooling circulating water cools down, and when temperature reaches setting value, starts cylinder, pressurizes for battery, when reaching setting time, cools down
Recirculated water and pressurization terminate.After adding cold pressing for battery, the migration rate of electrolyte can be reduced, next automatic liquid-pumping at
During type, the extraction of electrolyte is reduced, improves and protects liquid measure, can guarantee the cycle performance of battery；When secondary encapsulation,
The problems such as if electrolyte influences whether the accuracy of end socket temperature in seal region, bad so as to cause colloidal sol, electrolyte is also
It can corrode seal region, therefore add the encapsulation that can guarantee battery after cold pressing, so that it is guaranteed that the leakproofness of battery；In pressure process
In, pressure energy makes battery CO as caused by internal side reaction in formation process2Deng being present in electrode in the form of bubble
Exhaust gas between diaphragm is discharged to air bag, thus improve battery in the homogeneity of charge and discharge process intermediate ion migration distance,
Improve the charge and discharge irreversible capacity loss of battery and cycle performance and the uniform performance of improvement battery.In addition cold pressing can also make
The battery not yet to cool down improves battery appearance from new plastic deformation.
Wherein, it is equipped with aluminium sheet guide rail 12 in the cooler 1, for connecting the pressurization plate 4.Pressurization can be made flat in this way
Plate 4 is connected, and when pressurizer 3 works, can disposably squeeze whole pressurization plates, realize the uniform surface of muti-piece battery core
Pressure.
Wherein, one end of the cooler 1 be equipped with cylinder air inlet pipeline 13, the pressurizer 3 connect the cylinder into
Port pipeline 13；The other end of cooler 1 is equipped with cooling water pipeline 14.
As shown in Fig. 2 ~ Fig. 3, cooling water is by each parallel interface cooling water pipeline of cooling water pipeline in every cooling aluminium sheet 11
In 14, it is pooled to each water outlet pipeline in parallel by two interior conduits in parallel, realizes heat exchanging process.
In order to solve the above-mentioned technical problem, the present invention also provides the cold compaction process before a kind of two envelope for lithium ion battery,
Include the following steps:
S1: starting cold press device, and system is initialized, read the temperature of cooling aluminium sheet；
S2: whether the temperature of upper computer detection cooling aluminium sheet is the first temperature,
If so, thening follow the steps S3；
Conversely, thening follow the steps S30: the temperature of display screen display cooling aluminium sheet, and start circulation waterway and cooled down；
Whether S3: having battery core between upper computer detection pressurization plate,
If so, thening follow the steps S4；
Conversely, thening follow the steps S40: PC control feeding manipulator clamping battery core is put into pressurization plate, and return step
S3；
S4: whether the temperature of upper computer detection cooling aluminium sheet cools to second temperature,
If so, thening follow the steps S5；
Conversely, thening follow the steps S50: acquiring temperature, pressure information in cold press device, PC control by data acquisition circuit
Cooling water flow；
S5: upper computer detection temperature fall time whether be in the cooling time of section,
If so, terminating process；
Conversely, thening follow the steps S6: the cooling water flow that PC control cools down in aluminium sheet, to control cooling rate.
It wherein, further include step S0 before step S1: preset first temperature, second temperature and section cooling time.
The beneficial effects of the present invention are: it is different from the prior art, present invention cooling aluminium sheet cools down, and reaches in temperature
To after the first setting value, by pressurizer pressure pressurization plate, and further uniformly press onto battery core, realization cold pressing.Pass through
Aforesaid way, the present invention can reduce electrolyte migration rate, and in wherein drawing liquid forming process, reduce the extraction of electrolyte,
It improves and protects liquid measure, can guarantee the cycle performance of battery；And it is cold-pressed and can guarantee cell package, it is ensured that battery sealing-performance, discharge electricity
The gas generated in the formation process of pond improves cycle performance and the uniform performance of charge and discharge irreversible capacity loss and battery.
In a specific embodiment, as shown in figure 4, the method and step being cold-pressed using above-mentioned cold press device is as follows:
Step 301: starter initializes system, reads device temperature, product blanking；
Step 302: whether detection fixture aluminium sheet temperature arrives assigned temperature；
If not, thening follow the steps 303: display screen display fixture aluminium sheet temperature information starts recirculated cooling water；
Step 304: whether having had battery core in detection fixture；
If not, thening follow the steps 305: transferring data to PLC(i.e. host computer), control manipulator feeding clamping battery core is put into
In fixture；
Step 306: whether detection aluminum plate fixture temperature cools to setting value；
If not, thening follow the steps 307: acquiring associated temperature, pressure information, rate of temperature fall or temperature by data acquisition circuit
Not in control range, PLC makes a response rapidly, carries out control change to cooling water flow, makes temperature in control range；
Step 308: judging whether temperature fall time is in setting time section；
If not, thening follow the steps 309: the information passed back by temperature sensor is judged by PLC, and temperature is not up to set
When definite value, work on；
Step 310: terminating.
Following table illustrates that two Feng Qianjia cold press device of battery improves front and back comparison:
| Project | Before improvement | After improvement |
| 1 | Battery can generate portion gas in formation process, rest on electrode surface and every Between film, flatness between electrode is influenced, influences the uniform performance of battery | After cold pressing, the gas extrusion generated when by the chemical conversion of inside battery is come out, and improves electrode With the flatness of diaphragm, reduces electrode spacing, improve the efficiency for charge-discharge of battery |
| 2 | Under normal temperature, the flow rate of electrolyte is larger, and liquid loss amount is larger, influences electricity The cycle performance in pond | It improves battery and protects liquid measure, reduce electrolyte loss, guarantee cycle performance of battery. |
| 3 | Under normal temperature, the flow rate of electrolyte is larger, and electrolyte flow arrives when two envelopes Seal region causes encapsulation not firm | After cold pressing, the rate of electrolyte flow reduces, the electrolyte content of seal region when encapsulation It is small, encapsulation problem can be improved well |
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to be said using the present invention
Equivalents made by bright book and accompanying drawing content are applied directly or indirectly in relevant technical field, are similarly included in this
In the scope of patent protection of invention.
Claims (8)
1. the cold press device before a kind of two envelope for lithium ion battery characterized by comprising
Cooler is made of the identical cooling aluminium sheet of muti-piece；
Feeding manipulator, positioned at the top of the cooler；
Pressurizer is moved towards by cylinder-driven to cooler both ends, positioned at the both ends of cooler to squeeze cooler；
Pressurize plate, is spaced apart in cooler, is used to place battery core between the pressurization plate.
2. the cold press device according to claim 1 for before two envelope of lithium ion battery, which is characterized in that the cooling aluminium
Plate has 25.
3. the cold press device according to claim 1 or 2 for before two envelope of lithium ion battery, which is characterized in that every drop
Circulation waterway is equipped in warm aluminium sheet, and the circulation waterway between the aluminium sheet that cools down is in parallel.
4. the cold press device according to claim 1 for before two envelope of lithium ion battery, which is characterized in that the cooler
It is interior to be equipped with aluminium sheet guide rail, for connecting the pressurization plate.
5. the cold press device according to claim 1 for before two envelope of lithium ion battery, which is characterized in that the cooler
One end be equipped with cylinder air inlet pipeline, the other end be equipped with cooling water pipeline.
6. the cold press device according to claim 5 for before two envelope of lithium ion battery, which is characterized in that the pressurizer
Connect the cylinder air inlet pipeline.
7. the cold compaction process before a kind of two envelope for lithium ion battery, which comprises the steps of:
S1: starting cold press device, and system is initialized, read the temperature of cooling aluminium sheet；
S2: whether the temperature of upper computer detection cooling aluminium sheet is the first temperature,
If so, thening follow the steps S3；
Conversely, thening follow the steps S30: the temperature of display screen display cooling aluminium sheet, and start circulation waterway and cooled down；
Whether S3: having battery core between upper computer detection pressurization plate,
If so, thening follow the steps S4；
Conversely, thening follow the steps S40: PC control feeding manipulator clamping battery core is put into pressurization plate, and return step
S3；
S4: whether the temperature of upper computer detection cooling aluminium sheet cools to second temperature,
If so, thening follow the steps S5；
Conversely, thening follow the steps S50: acquiring temperature, pressure information in cold press device, PC control by data acquisition circuit
Cooling water flow；
S5: upper computer detection temperature fall time whether be in the cooling time of section,
If so, terminating process；
Conversely, thening follow the steps S6: the cooling water flow that PC control cools down in aluminium sheet, to control cooling rate.
8. the cold compaction process according to claim 7 for before two envelope of lithium ion battery, which is characterized in that step S1 it
Before, it further include step S0: preset first temperature, second temperature and section cooling time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700015.2A CN109411825A (en) | 2017-08-16 | 2017-08-16 | For the cold press device and method before two envelope of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710700015.2A CN109411825A (en) | 2017-08-16 | 2017-08-16 | For the cold press device and method before two envelope of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109411825A true CN109411825A (en) | 2019-03-01 |
Family
ID=65454374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710700015.2A Pending CN109411825A (en) | 2017-08-16 | 2017-08-16 | For the cold press device and method before two envelope of lithium ion battery |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115428246A (en) * | 2020-05-07 | 2022-12-02 | 株式会社Lg新能源 | Degassing apparatus and degassing method |
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|---|---|---|---|---|
| CN103811816A (en) * | 2014-02-12 | 2014-05-21 | 宁德新能源科技有限公司 | Lithium ion battery hot and cold-press formation equipment |
| CN204088497U (en) * | 2014-07-01 | 2015-01-07 | 珠海光宇电池有限公司 | Lithium ion battery cold-pressing clamping apparatus and cold press |
| CN104953183A (en) * | 2015-06-24 | 2015-09-30 | 浙江杭可科技有限公司 | Soft-packed lithium ion battery hot and cold pressing formation device |
| CN204760496U (en) * | 2015-06-24 | 2015-11-11 | 浙江杭可科技有限公司 | Soft packet of lithium ion battery heat of colding pressing becomes equipment |
| CN207265178U (en) * | 2017-08-16 | 2018-04-20 | 福建冠城瑞闽新能源科技有限公司 | For the cold press device before two envelope of lithium ion battery |
-
2017
- 2017-08-16 CN CN201710700015.2A patent/CN109411825A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811816A (en) * | 2014-02-12 | 2014-05-21 | 宁德新能源科技有限公司 | Lithium ion battery hot and cold-press formation equipment |
| CN204088497U (en) * | 2014-07-01 | 2015-01-07 | 珠海光宇电池有限公司 | Lithium ion battery cold-pressing clamping apparatus and cold press |
| CN104953183A (en) * | 2015-06-24 | 2015-09-30 | 浙江杭可科技有限公司 | Soft-packed lithium ion battery hot and cold pressing formation device |
| CN204760496U (en) * | 2015-06-24 | 2015-11-11 | 浙江杭可科技有限公司 | Soft packet of lithium ion battery heat of colding pressing becomes equipment |
| CN207265178U (en) * | 2017-08-16 | 2018-04-20 | 福建冠城瑞闽新能源科技有限公司 | For the cold press device before two envelope of lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115428246A (en) * | 2020-05-07 | 2022-12-02 | 株式会社Lg新能源 | Degassing apparatus and degassing method |
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Application publication date: 20190301 |
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