CN109524613A - Fluid injection efficiency and the method for promoting battery core performance in a kind of raising cell manufacturing process - Google Patents
Fluid injection efficiency and the method for promoting battery core performance in a kind of raising cell manufacturing process Download PDFInfo
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- CN109524613A CN109524613A CN201710851410.0A CN201710851410A CN109524613A CN 109524613 A CN109524613 A CN 109524613A CN 201710851410 A CN201710851410 A CN 201710851410A CN 109524613 A CN109524613 A CN 109524613A
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- battery
- fluid injection
- electrolyte
- battery core
- pole piece
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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- 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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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The invention discloses fluid injection efficiency and the methods for promoting battery core performance in a kind of raising cell manufacturing process, belong to technical field of lithium ion.Electrolyte is heated to 45 DEG C~55 DEG C before the fluid injection process for preparing battery by method of the invention, by heating electrolyte under such specific conditions, thermogenic action can be occurred to pole piece after fluid injection, be improved the wicking path and efficiency of pole piece.Method of the invention solves the problems such as fluid injection is difficult, imbibition is slow, activation time is long, while improving battery core performance, and realize direct continuous automatic production after fluid injection, can largely improve the degree of automation.Fluid injection of the invention is high-efficient, and pole piece rate of liquid aspiration is fast, with short production cycle, compared to the technique for not heated to electrolyte and directly preparing battery in room temperature, battery liquid-filling efficiency improves 20%~60%, and pole piece rate of liquid aspiration improves 20%~60%, and the production cycle shortens 2~3 days.
Description
Technical field
The invention belongs to technical field of lithium ion, it is related to fluid injection efficiency and promotion in a kind of raising cell manufacturing process
The method of battery core performance.
Background technique
Cylindrical battery has many advantages, such as that capacity is high, has extended cycle life, use environment temperature is broad, obtains in multiple fields
It is widely applied.Attention with people to electronic product large capacity, the long continuation of the journey of power battery etc., high energy density cells
Research and development become the key area of battery development.
In cylindrical battery preparation process, fluid injection (i.e. injection electrolyte) process is to manufacture the critical process of cylindrical battery,
Reservoir quantity and fluid injection mode directly affect the capacity and security performance of battery.And fluid injection efficiency then directly affects the life of cylindrical battery
Produce the period.
Existing 18650 lithium battery high-energy density field of cylinder, battery pole piece compactness is very high, leads to the electricity in fluid injection stage
Solution liquid is difficult to be sucked by pole piece, and the fluid injection time is long.Need to carry out the cell activation stage before formation process simultaneously to ensure pole piece pair
The absorption of electrolyte, in order to guarantee that pole piece can fully absorb electrolyte, stage activation time for requiring to grow very much (such as
18650 battery 2600mAh battery core batteries need to activate 2 days or more), and this activation procedure directly result in sealing fluid injection after with change
At process can not continuous automatic production, influence production capacity.
105529429 A of CN discloses a kind of electrolyte filling method of column lithium ion battery, comprising the following steps: S1, right
Lithium battery is vacuumized, and 1s~9s is kept；S2, vacuum is let out to electrolyte cup chamber；S3, fluid injection is carried out to lithium battery；S4, to electricity
Solution liquid cup chamber is passed through nitrogen, and pressure reaches 2.7~3.0Mpa, keeps 50~200s, then rushes down pressure；S5, lithium battery is vacuumized,
1s~9s is kept, vacuum is then rushed down；S6, weight execute S4-S5 and set number；S7, it is passed through nitrogen to electrolyte cup chamber, pressure reaches
To 2.7~3.0Mpa, 50~200s is kept, then rushes down pressure, fluid injection is completed.This method can increase battery pole piece to electrolyte
Absorption rate, but operating process is cumbersome, is unfavorable for industrialized production and application.
Summary of the invention
For the above-mentioned problems in the prior art, the purpose of the present invention is to provide a kind of raising cell manufacturing process
Middle fluid injection efficiency and the method for promoting battery core performance.Method of the invention not only can be improved fluid injection efficiency, improve pole piece imbibition
Speed saves activation procedure and promotes the performance of battery core, can also promote the automation of cell manufacturing process posterior segment, realize note
Direct continuous automatic production after liquid improves the degree of automation.
" promoting battery core performance " of the present invention refers to: improving the cycle performance of battery.
In order to achieve the above object, the invention adopts the following technical scheme:
Fluid injection efficiency and the method for promoting battery core performance, the method pass through in fluid injection in a kind of raising cell manufacturing process
Electrolyte 45 DEG C~55 DEG C are heated to before to achieve the purpose that improve fluid injection efficiency.
In the present invention, " fluid injection " refers to: injection electrolyte.
In the present invention, electrolyte is heated to 45 DEG C~55 DEG C, for example, 45 DEG C, 46 DEG C, 47 DEG C, 48 DEG C, 49 DEG C, 50 DEG C,
51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C or 55 DEG C etc., preferably 50 DEG C.
Method of the invention carries out fluid injection by using the electrolyte of certain temperature (50 DEG C ± 5 DEG C) and prepares battery, battery core
In pole piece influenced by electrolyte temperature, expanded by heating, surface micropore increase, to improve the wicking path and effect of pole piece
Rate.Moreover, in 50 DEG C ± 5 DEG C of this temperature range, while guaranteeing that electrolyte efficiently plays its effect, electrolyte diffusion speed
Degree is fast, and rate of liquid aspiration improves.Fluid injection efficiency not only can be improved in method of the invention, can also improve the imbibition efficiency of pole piece,
Production efficiency is improved, the production cycle is shortened.
It is used as currently preferred technical solution below, but not as the limitation to technical solution provided by the invention, leads to
Following preferred technical solution is crossed, can preferably reach and realize technical purpose and beneficial effect of the invention.
Preferably, the battery is cylindrical battery, preferably 18650 cylindrical batteries.
Preferably, the electrolyte includes ethylene carbonate (Ethylene carbonate, EC), methyl ethyl carbonate
(ethyl methyl carbonate, EMC), dimethyl carbonate (Dimethyl carbonate, DMC) and LiPF6。
It can also include special additive in electrolyte of the invention, the special additive is well known in the art
Additive.
Preferably, the equipment used that heats is die heater.
Preferably, when heating electrolyte using die heater, control heating temperature is 50 DEG C and positive negative error is 5 DEG C；Safety
Temperature setting is 60~70 DEG C, and drop temperature is controlled at 45~55 DEG C.
In this optimal technical scheme, control heating temperature is 50 DEG C and positive negative error is 5 DEG C, then actual temperature is, for example, 45
DEG C, 46 DEG C, 47 DEG C, 48 DEG C, 49 DEG C, 50 DEG C, 51 DEG C, 52 DEG C, 54 DEG C or 55 DEG C etc..
In this optimal technical scheme, safe temperature is set as 60~70 DEG C, for example, 60 DEG C, 62 DEG C, 63 DEG C, 65 DEG C, 66 DEG C,
67 DEG C, 68 DEG C, 69 DEG C or 70 DEG C etc..
In this optimal technical scheme, drop temperature is controlled at 45~55 DEG C, such as 45 DEG C, 46 DEG C, 47.5 DEG C, 49 DEG C, 50
DEG C, 51 DEG C, 52 DEG C, 53 DEG C, 54 DEG C or 55 DEG C etc..
As the optimal technical scheme of the method for the invention, the battery is cylindrical battery, and the preparation of cylindrical battery
Process includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product；
(2) electrolyte is heated to 45 DEG C~55 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
In this optimal technical scheme, " the battery core fluid injection " refers to: injecting the electrolyte into battery core, specific injection mode
It is not construed as limiting, those skilled in the art can refer to method disclosed in the prior art and carry out fluid injection.
Preferably, activation step is not included in the preparation process of the cylindrical battery.The present invention is added before fluid injection
The process step design of heat to 45 DEG C~55 DEG C not only solves the slow problem of fluid injection low efficiency in cell manufacturing process, pole piece imbibition,
Activation step can also be saved under the premise of not reducing battery performance.Activation step is saved, the time is on the one hand saved, is shortened
On the other hand production cycle improves middle section (fluid injection) and back segment (chemical conversion) and automates.
For conventional production process, it need to successively carry out battery core fluid injection, sealing, mantle, activate 2 days~3 days, chemical conversion, it is this
Under process conditions, automation connection is difficult.
And in this preferred embodiment, without carrying out activation step, automation connection can be directly carried out after battery core fluid injection, it is real
It now seals, the continuous production of mantle and chemical conversion, has a clear superiority relative to conventional production process.
Preferably, the battery core is wound by positive plate, diaphragm and negative electrode tab, and diaphragm will be between positive plate and negative electrode tab
It separates.
In the present invention, the composition and source of positive plate, diaphragm and negative electrode tab are not construed as limiting, anode disclosed in the prior art
Piece, diaphragm and negative electrode tab are used equally for the present invention.
Preferably, in the preparation process of the cylindrical battery, middle section and back segment are realized by automation, and the middle section is note
Liquid step, the back segment are chemical conversion step.
Compared with the prior art, the invention has the following beneficial effects:
(1) present invention is by being heated to 45 DEG C~55 DEG C for electrolyte before fluid injection, not only can solve battery (such as
18650 lithium ion batteries) fluid injection is difficult in preparation process, pole piece imbibition is slow problem, battery core performance is promoted, may be omitted with activating
Step.Save activation step on the one hand solve the problems, such as activation time-consuming, on the other hand can be achieved fluid injection after posterior segment it is direct
The degree of automation is substantially improved in continuous automatic production.
(2) method of the invention can greatly improve fluid injection efficiency, and pole piece rate of liquid aspiration shortens the production cycle, is conducive to work
Industry metaplasia produces.Compared to the technique for electrolyte not being heated and directly being prepared in room temperature battery, battery liquid-filling efficiency improves 20%
~60%, pole piece rate of liquid aspiration improves 20%~60%, and the production cycle shortens 2~3 days.
(3) battery core performance can be substantially improved in method of the invention, and cycle performance greatly promotes, and battery of the invention is in 0.5C
The 0.5C that charges discharges 1200 capacity retention ratios still 87% or more；And the electricity that electrolyte is not heated and is directly prepared in room temperature
Pond conservation rate when the same terms are recycled to 1000 times falls to rapidly 82.5%, and the conservation rate that circulation is 1200 times is lower.As it can be seen that
Method of the invention can significantly improve the performance of battery core.
Detailed description of the invention
Fig. 1 is electrolyte cycle performance comparison diagram before and after the processing, wherein electrolyte heats corresponding embodiment 1, and electrolyte is not
Heat corresponding comparative example 1；Loop test condition is 0.5C charging 0.5C electric discharge, normal temperature circulation.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
In the embodiment of the present invention, the positive electrode active materials in positive plate may be, for example, LiFePO4, tertiary cathode material
Deng the negative electrode active material in negative electrode tab is, for example, graphite, carbon-silicon composite material etc..
Embodiment 1
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 50 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 58%, and pole piece imbibition efficiency improves 60%.
Fig. 1 is electrolyte cycle performance comparison diagram before and after the processing, wherein electrolyte heats corresponding embodiment 1, and electrolyte is not
Heat corresponding comparative example 1；Loop test condition is 0.5C charging 0.5C electric discharge.As seen from the figure, after the present embodiment recycles 1200 times
Capacity retention ratio is still 89%, and D1 recycles 1000 capacity retention ratios and falls to 82.5%, and recycling 1200 conservation rates can be more
Down to 74% or so.As it can be seen that the method for heating fluid injection again for first carrying out certain temperature to electrolyte of the invention can significantly improve
The performance of battery core.
Embodiment 2
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 45 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 21%, and pole piece imbibition efficiency improves 23%.
Battery 0.5C charging 1200 capacity retention ratios of 0.5C discharge cycles manufactured in the present embodiment are still 87% or more.
Embodiment 3
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 55 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 23%, and pole piece imbibition efficiency improves 24%.
Battery 0.5C charging 1200 capacity retention ratios of 0.5C discharge cycles manufactured in the present embodiment are still 87% or more.
Embodiment 4
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 47 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 38%, and pole piece imbibition efficiency improves 40%.
Battery 0.5C charging 1200 capacity retention ratios of 0.5C discharge cycles manufactured in the present embodiment are still 87% or more.
Embodiment 5
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 48.5 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 45%, and pole piece imbibition efficiency improves 46.5%.
Battery 0.5C charging 1200 capacity retention ratios of 0.5C discharge cycles manufactured in the present embodiment are still 87% or more.
Embodiment 6
The present embodiment provides fluid injection efficiency and the method for promoting battery core performance in a kind of raising cylindrical battery preparation process, packets
It includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product.
Wherein, battery core is wound by positive plate, diaphragm and negative electrode tab, and positive plate and negative electrode tab are spaced apart by diaphragm.
(2) electrolyte is heated to 52.5 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
The present embodiment prepares cylindrical battery without activation step, with comparative example 1 not to electrolyte heating and directly in room temperature
The technique that (~25 DEG C) prepare battery is compared, and battery liquid-filling efficiency improves 52%, and pole piece imbibition efficiency improves 53%.
Battery 0.5C charging 1200 capacity retention ratios of 0.5C discharge cycles manufactured in the present embodiment are still 87% or more.
Comparative example 1
Except not to electrolyte heat and directly in addition to (~25 DEG C) progress fluid injections of room temperature, other preparation methods and condition and reality
It is identical to apply example 1.
The Applicant declares that the present invention is explained by the above embodiments method detailed of the invention, but the present invention not office
Be limited to above-mentioned method detailed, that is, do not mean that the invention must rely on the above detailed methods to implement.Technical field
Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of improve fluid injection efficiency and the method for promoting battery core performance in cell manufacturing process, which is characterized in that including electricity
Before liquid injection hole fluid injection in core, shell, liquid injection hole and the battery of nut cap semi-finished product, electrolyte is first heated to 45 DEG C~55
℃。
2. the method according to claim 1, wherein electrolyte is heated to 50 DEG C before fluid injection.
3. method according to claim 1 or 2, which is characterized in that the battery is cylindrical battery, preferably 18650 cylinders
Battery.
4. method according to claim 1-3, which is characterized in that include ethylene carbonate in the electrolyte
EC, methyl ethyl carbonate EMC, dimethyl carbonate DMC and LiPF6。
5. method according to claim 1-4, which is characterized in that the equipment used that heats is die heater.
6. according to the method described in claim 5, it is characterized in that, controlling heating temperature when heating electrolyte using die heater
For 50 DEG C and positive negative error is 5 DEG C；Safe temperature is set as 60~70 DEG C, and drop temperature is controlled at 45~55 DEG C.
7. method according to claim 1-6, which is characterized in that the battery is cylindrical battery, and cylinder is electric
The preparation process in pond includes:
(1) preparation includes battery core, shell, liquid injection hole and the cylindrical battery of nut cap semi-finished product；
(2) electrolyte is heated to 45 DEG C~55 DEG C before fluid injection, then carries out battery core fluid injection from liquid injection hole；
(3) it seals, mantle, chemical conversion obtains cylindrical battery.
8. the method according to the description of claim 7 is characterized in that not including activation step in the preparation process of the cylindrical battery
Suddenly.
9. method according to claim 7 or 8, which is characterized in that the battery core is wound by positive plate, diaphragm and negative electrode tab
It forms, and positive plate and negative electrode tab are spaced apart by diaphragm.
10. according to the described in any item methods of claim 7-9, which is characterized in that in the preparation process of the cylindrical battery, in
Section and back segment realize that the middle section is fluid injection step by automation, and the back segment is chemical conversion step.
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| CN201710851410.0A CN109524613A (en) | 2017-09-20 | 2017-09-20 | Fluid injection efficiency and the method for promoting battery core performance in a kind of raising cell manufacturing process |
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| CN201710851410.0A CN109524613A (en) | 2017-09-20 | 2017-09-20 | Fluid injection efficiency and the method for promoting battery core performance in a kind of raising cell manufacturing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690506A (en) * | 2019-09-30 | 2020-01-14 | 深圳君耀投资合伙企业(有限合伙) | Lithium ion battery assembling method and lithium ion battery |
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| CN102646809A (en) * | 2012-04-23 | 2012-08-22 | 宁德新能源科技有限公司 | Filling and activating method for flexible-packaging lithium ion battery |
| CN202651260U (en) * | 2012-06-20 | 2013-01-02 | 湖北三俊电池有限公司 | Electrolyte injector with heating function |
| CN202678452U (en) * | 2012-06-20 | 2013-01-16 | 东莞新能源科技有限公司 | Electrolyte heating device of lithium ion battery injection machine |
| KR20170004217A (en) * | 2015-07-01 | 2017-01-11 | 주식회사 엘지화학 | Manufacturing process for secondary battery |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646809A (en) * | 2012-04-23 | 2012-08-22 | 宁德新能源科技有限公司 | Filling and activating method for flexible-packaging lithium ion battery |
| CN202651260U (en) * | 2012-06-20 | 2013-01-02 | 湖北三俊电池有限公司 | Electrolyte injector with heating function |
| CN202678452U (en) * | 2012-06-20 | 2013-01-16 | 东莞新能源科技有限公司 | Electrolyte heating device of lithium ion battery injection machine |
| KR20170004217A (en) * | 2015-07-01 | 2017-01-11 | 주식회사 엘지화학 | Manufacturing process for secondary battery |
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| CN110690506A (en) * | 2019-09-30 | 2020-01-14 | 深圳君耀投资合伙企业(有限合伙) | Lithium ion battery assembling method and lithium ion battery |
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