CN105679971B - Aluminum plastic film composite layer and secondary cell - Google Patents
Aluminum plastic film composite layer and secondary cell Download PDFInfo
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- CN105679971B CN105679971B CN201410658344.1A CN201410658344A CN105679971B CN 105679971 B CN105679971 B CN 105679971B CN 201410658344 A CN201410658344 A CN 201410658344A CN 105679971 B CN105679971 B CN 105679971B
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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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Abstract
The present invention provides a kind of aluminum plastic film composite layer and secondary cells.The aluminum plastic film composite layer includes the first polymer layer, aluminium foil layer and the second polymer layer, aluminium foil layer is between the first polymer layer and the second polymer layer, and electrolyte can be isolated with aluminium foil layer for the second polymer layer, so that electrolyte cannot contact aluminium foil layer through the second polymer layer.Contain shear thickening liquid in aluminum plastic film composite layer, and shear thickening liquid is located inside of the first polymer layer towards battery core in aluminum plastic film composite layer.The secondary cell includes aforementioned aluminum plastic film composite layer.When secondary cell works normally, the chemical property of secondary cell is unaffected, when secondary cell such as is collided, squeezes, falls at the machinery abuse, aluminum plastic film composite layer in secondary cell can effectively avoid the short circuit occurred inside of secondary cell, to improve the security performance of secondary cell.
Description
Technical field
The present invention relates to battery technology field more particularly to a kind of aluminum plastic film composite layers and secondary cell.
Background technology
More frivolous aluminum plastic film is commonly used in the secondary battery as outer packing, but aluminum plastic film is in secondary cell
The protective effect in portion is not so good as traditional box hat and aluminum hull, therefore when secondary cell (for example is collided, squeezes, falls by machinery abuse
Fall) when, it is easy to cause the short circuit occurred inside of secondary cell, and then cause safety accident.Mainly by right in existing market
The external addition protection circuit device of secondary cell, while flame-retardant additive is added in the electrolyte inside secondary cell, and
The danger that mechanical abuse in turn results in internal short-circuit is occurred for secondary cell to be preferably minimized.But these measures are to a certain extent
The chemical property of secondary cell can be reduced.
Invention content
The problem of in view of background technology, the purpose of the present invention is to provide a kind of aluminum plastic film composite layer and secondary electricity
Pond, when secondary cell works normally, the chemical property of secondary cell is unaffected, when secondary cell is collided,
When the machinery abuse such as squeezing, fall, the aluminum plastic film composite layer in secondary cell can effectively avoid secondary cell inside occur it is short
Road, to improve the security performance of secondary cell.
To achieve the goals above, in one aspect of the invention, the present invention provides a kind of aluminum plastic film composite layers comprising
The first polymer layer, aluminium foil layer and the second polymer layer, aluminium foil layer between the first polymer layer and the second polymer layer,
And electrolyte can be isolated with aluminium foil layer for the second polymer layer, so that electrolyte cannot contact aluminium through the second polymer layer
Layers of foil.Contain shear thickening liquid in aluminum plastic film composite layer, and shear thickening liquid is located at the first polymerization in aluminum plastic film composite layer
Inside of the nitride layer towards battery core.
In the second aspect of the present invention, the present invention provides a kind of secondary cells, including battery core, the packaging of packaging electric core
Bag and the electrolyte for being contained in packaging bag and impregnating battery core.Wherein, packaging bag use is described according to a first aspect of the present invention
Aluminum plastic film composite layer be made, and the second polymer layer is towards battery core.
Compared with the existing technology, beneficial effects of the present invention are as follows：
(1) when secondary cell works normally, the shear thickening liquid in aluminum plastic film composite layer is with readily flowed liquid
State exists, therefore the chemical property of secondary cell is unaffected；When secondary cell is collided, squeezes, falls
When machinery abuse, the viscosity of the shear thickening liquid in aluminum plastic film composite layer increased dramatically and absorb big energy, or even transformation
For class solid matter so that aluminum plastic film composite layer is hardened rapidly, plays the role of protecting battery core, effectively avoids the inside of secondary cell
Short circuit occurs, to improve the security performance of secondary cell；After machinery abuse disappears, the shear thickening in aluminum plastic film composite layer
Liquid shows readily flowed liquid condition again, therefore does not influence being continuing with for secondary cell.
(2) production cost of secondary cell of the invention is low, simple for process, the side effects such as nonhazardous, and is especially suitable for wide
General production.
Description of the drawings
Fig. 1 is the schematic diagram of aluminum plastic film composite layer according to an embodiment of the invention；
Fig. 2 is the schematic diagram of aluminum plastic film composite layer according to another embodiment of the present invention；
Fig. 3 is the schematic diagram of aluminum plastic film composite layer according to yet another embodiment of the invention；
Fig. 4 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Fig. 5 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Fig. 6 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Fig. 7 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Fig. 8 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Fig. 9 is the schematic diagram according to the aluminum plastic film composite layer of further embodiment of this invention；
Figure 10 is the schematic diagram of secondary cell according to an embodiment of the invention；
Figure 11 is the rheological curve of the shear thickening liquid of the embodiment of the present invention 1；
Figure 12 is the photo after the secondary cell impact test of the comparative example 1 of the present invention；
Figure 13 is the photo after the secondary cell impact test of the embodiment of the present invention 1.
Wherein, the reference numerals are as follows：
1 battery core
2 packaging bags
3 aluminum plastic film composite layers
31 the first polymer layers
32 aluminium foil layers
33 the second polymer layers
331 sublayers
E electrolyte
F shear thickening liquid
Specific implementation mode
The following detailed description of aluminum plastic film composite layer according to the present invention and secondary cell and embodiment, comparative example and test
As a result.
Illustrate aluminum plastic film composite layer 3 according to a first aspect of the present invention first.
Referring to figs. 1 to Fig. 9, aluminum plastic film composite layer 3 according to a first aspect of the present invention includes the first polymer layer 31, aluminium foil
Layer 32 and the second polymer layer 33, aluminium foil layer 32 is between the first polymer layer 31 and the second polymer layer 33, and second
Electrolyte E can be isolated with aluminium foil layer 32 for polymeric layer 33, so that electrolyte E cannot be contacted through the second polymer layer 33
Aluminium foil layer 32.Contain shear thickening liquid F in aluminum plastic film composite layer 3, and shear thickening liquid F is located in aluminum plastic film composite layer 3
Inside of the first polymer layer 31 towards battery core 1.
When aluminum plastic film composite layer 3 according to a first aspect of the present invention is applied to secondary cell (in conjunction with Figure 10), second is poly-
Nitride layer 33 is closed towards battery core 1.When secondary cell works normally, the shear thickening liquid F in aluminum plastic film composite layer 3 is to be easy to flow
Dynamic liquid condition exists, therefore the chemical property of secondary cell is unaffected；When secondary cell is collided, squeezes
When the machinery abuse such as pressing, fall, the viscosity of the shear thickening liquid F in aluminum plastic film composite layer 3 increased dramatically and absorb a large amount of energy
Amount, or even it is changed into class solid matter so that aluminum plastic film composite layer 3 is hardened rapidly, plays the role of protecting battery core 1, effectively avoid
The short circuit occurred inside of secondary cell, to improve the security performance of secondary cell；After machinery abuse disappears, aluminum plastic film is compound
Shear thickening liquid F in layer 3 shows readily flowed liquid condition again, therefore does not influence being continuing with for secondary cell.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the shear thickening liquid F can be at aluminium foil
Between layer 32 and the first polymer layer 31 (referring to Fig. 1) and/or in aluminium foil layer 32 and the second polymer layer 33 (referring to Fig. 2) it
Between.The set-up mode of shear thickening liquid F may include one or more of injection, sealing, absorption, spraying and dipping.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, as depicted in figs. 1 and 2, the second polymer layer
33 can be one layer and the second polymer layer 33 is non-porous.The polymer of the second polymer layer 33 may include polyester fiber, polyethylene
(PE), one or more of polypropylene (PP) and polypropylene, polyethylene (PP/PE) composite material.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, as shown in Fig. 3 to Fig. 9, the second polymer layer
33 include multiple sublayers 331, and at least one of multiple sublayers 331 sublayer 331 is non-porous；Other than non-porous sublayer 331, remaining
At least one of sublayer 331 sublayer 331, which has, contains shear thickening liquid F in hole and hole.The set-up mode of shear thickening liquid F
It may include one or more of injection, sealing, absorption, spraying and dipping.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the porose sublayer of the second polymer layer 33
331 porosity can be 30%~60%.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the porose sublayer of the second polymer layer 33
331 polymer may include polyester fiber, Fypro, polyethylene (PE), polypropylene (PP) and polypropylene, polyethylene
(PP/PE) one or more of composite material.The porosity of the porose sublayer 331 of the second polymer layer 33 can be by poly-
Object is closed to be stretched and realized.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the non-porous sublayer of the second polymer layer 33
331 polymer may include that polyester fiber, polyethylene (PE), polypropylene (PP) and polypropylene, polyethylene (PP/PE) are compound
One or more of material.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the porose sublayer of the second polymer layer 33
331 thickness can be 5 μm~100 μm.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the viscosity of shear thickening liquid F can be
100PaS/25 DEG C~20000PaS/25 DEG C.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, shear thickening liquid F may include micro-nano
Grain and decentralized medium.When secondary cell such as is collided, squeezes, falls at the machinery abuse, near the point of impingement is in suspension
The micro-nano granules of state are gathered into particle cluster suddenly, and the viscosity of shear thickening liquid F increased dramatically and absorb big energy, even
It is changed into class solid matter, therefore aluminum plastic film composite layer 3 may make to be hardened rapidly, to plays the role of protecting secondary cell.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the quality of the micro-nano granules can be to cut
Cut the 10%~70% of the quality of thickening liquid F.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the quality of the decentralized medium can be shearing
The 30~90% of the quality of thickening liquid F.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the micro-nano granules may include titanium dioxide
One or more of silicon, alundum (Al2O3) and polystyrene.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the median particle diameter of the micro-nano granules can
For 10nm~10 μm.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the decentralized medium may include polypropylene glycol,
Polyethylene glycol, methoxy group polysiloxanes, hydroxy-terminated polysiloxane and one kind in ethyoxyl terminated polysiloxane or
It is several.
In the aluminum plastic film composite layer 3 described according to a first aspect of the present invention, the polymer in the first polymer layer 31 can
Including one kind in polyethylene (PE), polypropylene (PP) and polypropylene, polyethylene (PP/PE) composite material.
Secondly the secondary cell of explanation according to a second aspect of the present invention.
Referring to Fig.1 0, secondary cell according to a second aspect of the present invention, including battery core 1, packaging electric core 1 packaging bag 2, with
And it is contained in packaging bag 2 and impregnates the electrolyte E of battery core 1.Wherein, 2 use of packaging bag is described according to a first aspect of the present invention
Aluminum plastic film composite layer 3 be made, and the second polymer layer 33 is towards battery core 1.
The embodiment and comparative example of aluminum plastic film composite layer and secondary cell according to the present invention will be illustrated next.
Embodiment 1
(1) aluminum plastic film composite layer is prepared
At 25 DEG C, by silica dioxide granule and the polypropylene glycol liquid in mass ratio 50 that median particle diameter is 120nm:50
Mechanical agitation mixes 30min in planet stirring equipment, and the shear thickening liquid that viscosity is 2000 ± 500PaS is made；
As shown in figure 3, being 10 μm by thickness, the two sides for the polyester material cut that porosity is 42% is immersed in
In shear thickening liquid through preparing, dip time 2h will impregnate the polyester material (i.e. second of shear thickening liquid later
Polymeric layer has hole sublayer), thickness be 20 μm non-porous PP materials (i.e. the nonporous sublayers of the second polymer layer), thickness 40
μm aluminium foil (i.e. aluminium foil layer) and thickness be 25 μm non-porous PE materials (i.e. the first polymer layer) obtain aluminium after hot pressing successively
Plastic film composite layer.
(2) secondary cell is prepared
By positive active material cobalt acid lithium, bonding agent Kynoar (PVDF), conductive agent conductive black in mass ratio 94:
3:3 are uniformly mixed with solvent N-methyl pyrilidone, and finely dispersed anode sizing agent is obtained through high-speed stirred, then starch anode
Material is uniformly coated on plus plate current-collecting body aluminium foil, then carries out forced air drying, after through cold pressing obtain positive plate；
Negative electrode active material graphite, bonding agent butadiene-styrene rubber (SBR) and sodium carboxymethylcellulose (CMC), conductive agent are led
Electric carbon black in mass ratio 95:2:1:2 are uniformly mixed with solvent deionized water, and obtaining finely dispersed cathode through high-speed stirred starches
Material, then negative electrode slurry is uniformly coated on negative current collector copper foil, then carry out forced air drying, after through cold pressing obtain cathode
Piece；
LiPF6 and ethylene carbonate (EC) and diethyl carbonate (DEC) are configured to the LiPF of 1.0mol/L6Solution
(wherein, EC and DEC mass ratioes are 3:7) nonaqueous electrolytic solution, is obtained；
By the positive plate of preparation, negative plate and isolation film PE film rolls around being assembled into naked battery core, then by aluminum plastic film composite layer
Punching hole is carried out according to the size of naked battery core, naked battery core is placed in again later in the interior hole of aluminum plastic film composite layer and completes assembling, finally
Electrolyte is injected, and is packaged, is melted into, obtaining secondary cell after the processes such as capacity.
Embodiment 2
(1) aluminum plastic film composite layer is prepared
At 25 DEG C, the alundum (Al2O3) particle that median particle diameter is 600nm is pressed with methoxy group polyorganosiloxane fluid
Mass ratio 40:60 mix 60min under ultrasonic wave, and the shear thickening liquid that viscosity is 1500 ± 300PaS is made；
As shown in figure 3, shear thickening liquid obtained is sprayed on, thickness is 12 μm, porosity is 50% to cut
On the two sides of PP materials, spray 5 times repeatedly, by the PP materials for spraying shear thickening liquid, (i.e. the second polymer layer has later
Hole sublayer), the non-porous PP materials (i.e. the nonporous sublayers of the second polymer layer) that another thickness is 20 μm, the aluminium foil that thickness is 40 μm
It is compound that the non-porous PE materials (i.e. the first polymer layer) that (i.e. aluminium foil layer) and thickness are 25 μm obtain aluminum plastic film after hot pressing successively
Layer.
(2) secondary cell is prepared
Secondary cell is prepared according to (2) the step of embodiment 1, removes following difference：
The aluminum plastic film composite layer prepared using (1) the step of embodiment 2.
Embodiment 3
(1) aluminum plastic film composite layer is prepared
At 25 DEG C, granules of polystyrene and ethyoxyl terminated polysiloxane liquid that median particle diameter is 5 μm are pressed into quality
Than 60:40 on planet mixing plant mechanical agitation 3.5h, be made viscosity be 4000 ± 500PaS shear thickening liquid；
As shown in figure 3, being 15 μm by thickness, the two sides for the PP/PE composite materials cut that porosity is 58% dipping
In the shear thickening liquid made, dip time 5h will impregnate the PP/PE composite materials of shear thickening liquid later
(i.e. the second polymer layer has hole sublayer), thickness be 20 μm non-porous PP materials (i.e. the nonporous sublayers of the second polymer layer),
Non-porous PE materials (i.e. the first polymer layer) hot pressing successively that the aluminium foil (i.e. aluminium foil layer) and thickness that thickness is 40 μm are 25 μm
After obtain aluminum plastic film composite layer.
(2) secondary cell is prepared
Secondary cell is prepared according to (2) the step of embodiment 1, removes following difference：
The aluminum plastic film composite layer prepared using (1) the step of embodiment 3.
Embodiment 4
(1) aluminum plastic film composite layer is prepared
It is 50 in mass ratio by granules of polystyrene and polypropylene glycol liquid that median particle diameter is 1 μm at 25 DEG C:50
In planet stirring equipment after mechanical agitation 4h, ultrasonic vibration dispersion 1h is reused, it is cutting for 3500 ± 300PaS that viscosity, which is made,
Cut thickening liquid；
As shown in Fig. 2, by thickness be 35 μm non-porous PP materials (i.e. the second polymer layer, and it is single layer), thickness be
Non-porous PE materials (i.e. the first polymer layer) hot pressing successively that 40 μm of aluminium foil (i.e. aluminium foil layer) and thickness is 25 μm later will
Shear thickening liquid is injected between PP materials and aluminium foil, aluminum plastic film composite layer is obtained after sealing, wherein in aluminum plastic film composite layer
Shear thickening liquid distribution content be 1.5mL/cm3。
(2) secondary cell is prepared
Secondary cell is prepared according to (2) the step of embodiment 1, removes following difference：
The aluminum plastic film composite layer prepared using (1) the step of embodiment 4.
Comparative example 1
Secondary cell is prepared according to the method for embodiment 1, only in step (1), is not provided with shear thickening liquid, i.e., directly
Connect by non-porous polyester material (i.e. the second polymer layer is single layer) that thickness is 35 μm, aluminium foil (aluminium foil layer) that thickness is 40 μm with
And the non-porous PE materials (i.e. the first polymer layer) that thickness is 25 μm obtain aluminum plastic film composite layer after hot pressing successively.
Finally provide the performance test process and the performance test results of embodiment 1-4 and the secondary cell of comparative example 1.
(1) volume test of secondary cell
Under conditions of 25 ± 3 DEG C, with 0.5C constant-current charge 2h, constant-voltage charge to electric current is then carried out again and is reduced to 0.05C,
Then 5min is stood, then with 1C constant-current discharges, tests the discharge capacity of secondary cell.Take all secondary cells that test obtains
The average value of 1C discharge capacities weigh the discharge capacity of secondary cell.
(2) extruding (crush) test of secondary cell
Under conditions of 25 ± 3 DEG C, secondary cell is charged to by 100%SOC with the continuous current of 0.1C, is set later
(pressure is 0.5 ton) carries out extruding test in extrusion equipment.
(3) shock (impact) test of secondary cell
Under conditions of 25 ± 3 DEG C, the metal bar of a diameter of 15.8mm is placed on to the centre of secondary cell, uses 9.1kg
Weight from specified altitude assignment (61 ± 2.5cm) fall, hit metal bar, to secondary cell carry out impact test.
The criterion of the safety test of secondary cell is：It does not explode, is not on fire, not burning as passing through.
Table 1 provides the performance test results of embodiment 1-4 and the secondary cell of comparative example 1.
Figure 11 is that the rheological curve of the shear thickening liquid of embodiment 1 is cut it can be seen from the figure that shear rate is bigger
The viscosity for cutting thickening liquid is bigger.
From table 1 it follows that the chemical property of the secondary cell of the embodiment of the present invention 1-4 does not obviously deteriorate.
This is because when secondary cell works normally, the shear thickening liquid in aluminum plastic film composite layer is with readily flowed liquid condition
In the presence of, therefore the chemical property of secondary cell is unaffected.
Figure 12 is the photo after the secondary cell impact test of comparative example 1, and Figure 13 is that the secondary cell of embodiment 1 hits survey
Photo after examination.It can also be seen that the secondary electricity of the present invention from the performance test results in the comparison of Figure 12 and Figure 13 and table 1
Pond has higher security performance.This is because when secondary cell such as is collided, squeezes, falls at the machinery abuse, aluminum plastic film
The viscosity of shear thickening liquid in composite layer increased dramatically and absorb big energy, or even be changed into class solid matter so that
Aluminum plastic film composite layer is hardened rapidly, plays the role of protecting battery core, effectively avoids the short circuit occurred inside of battery, secondary to improve
The security performance of battery.
Claims (10)
1. a kind of aluminum plastic film composite layer, including the first polymer layer, aluminium foil layer and the second polymer layer, aluminium foil layer is located at first
Between polymeric layer and the second polymer layer, and electrolyte can be isolated with aluminium foil layer for the second polymer layer, so that electrolyte
Aluminium foil layer cannot be contacted through the second polymer layer,
It is characterized in that,
Contain shear thickening liquid in aluminum plastic film composite layer, and shear thickening liquid is located at first polymer in aluminum plastic film composite layer
Level is to the inside of battery core.
2. aluminum plastic film composite layer according to claim 1, which is characterized in that shear thickening liquid is in aluminium foil layer and first
Between polymeric layer and/or in aluminium foil layer between first polymer layer and the second polymer layer.
3. aluminum plastic film composite layer according to claim 2, which is characterized in that the second polymer layer is one layer and the second polymerization
Nitride layer is non-porous.
4. aluminum plastic film composite layer according to claim 3, which is characterized in that
The polymer of the second polymer layer includes polyester fiber, polyethylene, polypropylene and polypropylene, polyethylene composite material
One or more of.
5. aluminum plastic film composite layer according to claim 1 or 2, which is characterized in that
The second polymer layer includes multiple sublayers, and at least one of multiple sublayers sublayer is non-porous；
Other than non-porous sublayer, at least one of remaining sublayer sublayer, which has in hole and hole, contains shear thickening liquid.
6. aluminum plastic film composite layer according to claim 5, which is characterized in that the hole of the porose sublayer of the second polymer layer
Gap rate is 30%~60%.
7. aluminum plastic film composite layer according to claim 5, which is characterized in that
The polymer of the porose sublayer of the second polymer layer include polyester fiber, Fypro, polyethylene, polypropylene, with
And one or more of polypropylene, polyethylene composite material；
The polymer of the non-porous sublayer of the second polymer layer includes polyester fiber, polyethylene, polypropylene and polypropylene/poly-
One or more of ethylene composite material.
8. aluminum plastic film composite layer according to claim 1, which is characterized in that
Shear thickening liquid includes micro-nano granules and decentralized medium；
The micro-nano granules include one or more of silica, alundum (Al2O3) and polystyrene；
The decentralized medium include polypropylene glycol, polyethylene glycol, methoxy group polysiloxanes, hydroxy-terminated polysiloxane, with
And one or more of ethyoxyl terminated polysiloxane.
9. aluminum plastic film composite layer according to claim 1, which is characterized in that the polymer in the first polymer layer includes poly-
One kind in ethylene, polypropylene and polypropylene, polyethylene composite material.
10. a kind of secondary cell, including battery core, packaging electric core packaging bag and be contained in packaging bag and impregnate battery core
Electrolyte, which is characterized in that packaging bag is made of the aluminum plastic film composite layer according to any one of claim 1-9, and
The second polymer layer is towards battery core.
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| CN110931660A (en) * | 2019-11-12 | 2020-03-27 | 浙江锋锂新能源科技有限公司 | A protection architecture and soft packet of battery for soft packet of battery |
| CN113381067A (en) * | 2020-03-10 | 2021-09-10 | 荣盛盟固利新能源科技有限公司 | High-safety electrolyte of high-energy-density soft package battery and high-energy-density soft package battery |
| CN111725565A (en) * | 2020-06-24 | 2020-09-29 | 珠海冠宇电池股份有限公司 | Battery cell structure, preparation method and lithium ion battery |
| CN113508489A (en) * | 2020-12-22 | 2021-10-15 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113148436B (en) * | 2021-03-24 | 2022-07-29 | 丝艾（合肥）包装材料有限公司 | Manual easy-to-open lining film for tobacco package and processing method thereof |
| KR20240053088A (en) * | 2022-10-14 | 2024-04-24 | 광성기업 주식회사 | Plastic complex containing shear thickening fluid and manufacturing method therefor |
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