CN109346626A - One kind can jamproof polymer battery - Google Patents
One kind can jamproof polymer battery Download PDFInfo
- Publication number
- CN109346626A CN109346626A CN201811284941.7A CN201811284941A CN109346626A CN 109346626 A CN109346626 A CN 109346626A CN 201811284941 A CN201811284941 A CN 201811284941A CN 109346626 A CN109346626 A CN 109346626A
- Authority
- CN
- China
- Prior art keywords
- shell
- polymer battery
- nut cap
- jamproof
- sealing ring
- 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
- 229920000642 polymer Polymers 0.000 title claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 10
- 210000003205 muscle Anatomy 0.000 claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 claims abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 claims 1
- 230000036039 immunity Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229920000715 Mucilage Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003466 welding 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
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
-
- 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
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
It can jamproof polymer battery the invention discloses one kind, shell and nut cap including polymer battery core, for carrying the polymer battery core, the open end court of the shell curves inwardly, the open end of the nut cap is equipped with a circle card muscle, sealing ring is equipped at the nut cap and the cage connection, positive pole ear and negative lug are provided in the polymer battery core, the shell is equipped with the first through hole that the positive pole ear can be allowed to pass through, the nut cap is equipped with the second through-hole that the negative lug can be allowed to pass through, and is additionally provided with anti-avulsion tooth on sealing ring；The present invention has many advantages, such as small in size, light weight, prevents leakage, strong interference immunity, and is assembled using easy fast and effeciently packaging method, high production efficiency.
Description
Technical field
The present invention relates to polymer battery field, especially one kind can jamproof polymer battery.
Background technique
Polymer battery is also one kind of lithium ion battery, but has energy density compared with liquid lithium battery (Li-ion)
A variety of clear superiorities such as high, smallerization, ultrathin, lightweight and high security are a kind of novel batteries.In shape,
Lithium polymer battery has ultrathin feature, can cooperate the needs of various products, be fabricated to the battery of any shape and capacity.
The minimum thickness that such battery can achieve is up to 0.5mm.Its nominal voltage is also nominal voltage 3.7V as Li-ion,
There is no memory effect.Domestic polymer battery majority is only soft-package battery at present, does shell using aluminum plastic film；And tradition
Lithium battery be that electrolyte is marked in steel shell, be easy to happen the risk of leakage, and leakage can corrode steel shell so that steel shell become
It is thin, reduce the service life of battery.
By retrieval, Authorization Notice No. is a kind of Chinese patent " lithium polymer battery " of 207602700 U of CN, the reality
A kind of lithium polymer battery, including battery core, upper cover plate, lower cover plate, circuit board, glue-line, the battery core are disclosed with new patent
With anode and cathode, the upper cover plate has the first recess portion, and the lower cover plate has the second recess portion, the upper cover plate and lower cover
Plate is correspondingly provided with the through-hole for allowing the anode and cathode to pass through, and the battery core is between the upper cover plate and lower cover plate, institute
It states circuit board and is set to the battery core towards the side of the anode and cathode direction, the glue-line is located at the battery core and the electricity
Between the plate of road.The lithium polymer battery can be good at protecting battery core using upper cover plate and lower cover plate, it is ensured that the high-energy of battery core,
And the safety of battery is improved, and utilize the glue-line between battery core and circuit board, and bracket is eliminated, is reduced costs, it is heavier
What is wanted is that circuit board is enabled to effectively to be wrapped up and sealed, and improves the capability of influence of anti-external environment, makes it have more
Long service life.But the utility model needs to be bonded using glue-line in assembled, operational sequence is more cumbersome.
A kind of Chinese patent " electrostrictive polymer pool structure " of application publication number CN103855331A is also retrieved, the invention is public
A kind of electrostrictive polymer pool structure is opened, it includes battery core, protection board and the package assembling to encapsulate the battery core, is improved
In: the package assembling includes sheet metal, is made of the first sheet metal and the second sheet metal, and the first sheet metal is covered in battery core
Front surface, the second sheet metal are covered in the rear surface of battery core；End cap is made of drive end bearing bracket and rear end cap, and drive end bearing bracket is connected to
One end of one sheet metal and the second sheet metal, rear end cap are connected to the other end of the first sheet metal and the second sheet metal；Outside packet
Wrap up in part, external wrap member around the battery core surface loop for being covered with sheet metal around.The beneficial effect is that: the invention battery
Inner space is big, can utilize inner space to greatest extent, encapsulate the battery core of larger capacity, meet large capacity requirement；It is same with this
When, using the first sheet metal and the second sheet metal as protection, with enough intensity resist battery use environment impact and
The ability of scuffing can effectively protect internal battery core.But there are the following problems for this scheme: battery structure is by tab in the invention
It is realized with protection board welding and exports electric current and voltage outward, while increased metal plate, so that the volume of entire battery, weight are all
It increase accordingly, is not suitable for minor items, and equally use mucilage binding process in assembly, takes time and effort.
Summary of the invention
To solve the above problems, the invention discloses one kind can jamproof polymer battery, including polymerization
The open end court of object battery core, the shell for carrying the polymer battery core and nut cap, the shell curves inwardly, the nut cap
With sealing ring is equipped at the cage connection, described sealing ring one end is equipped with card muscle, is provided with anode in the polymer battery core
Tab and negative lug, the shell are equipped with the first through hole that the positive pole ear can be allowed to pass through, and the nut cap is equipped with energy
Allow the second through-hole that the negative lug passes through.
As a preferred solution of the present invention, the negative lug is welded in nut cap by Laser Welding, directly makees nut cap
For cathode output, battery structure overall volume is reduced, to decrease weight.
As a preferred solution of the present invention, the positive pole ear is by being laser-welded on shell, directly using shell as
Anode output, reduces battery structure overall volume, to decrease weight.
As a preferred solution of the present invention, the polymer battery core is cylindrical or cuboid, can be according to product needs
Adjustment.
As a preferred solution of the present invention, the shell exterior be equipped with several protrusions or the shell exterior be it is wavy,
Certain buffer function can be played, effective protection polymer battery core avoids being knocked, and reduces the service life.
As a preferred solution of the present invention, the sealing ring surface is equipped with screw thread, in assembly, enables to battery structure
Sealing performance it is more preferable.
As a preferred solution of the present invention, the sealing ring surface is equipped with screw thread or anti-avulsion tooth, and sealing effect is more preferable, is not easy
Displacement.
As a preferred solution of the present invention, the cross-sectional shape of the anti-avulsion tooth is selected from triangle, trapezoidal, rectangle, wave
Shape it is one or more.
As a preferred solution of the present invention, the shell with a thickness of 0.2-0.3mm and/or the nut cap with a thickness of
0.2-0.3mm, inner space is bigger, and battery capacity can be also improved.
As a preferred solution of the present invention, the shell and nut cap are used using stainless steel material and/or the sealing ring
Plastics or rubber.
It is a kind of can jamproof polymer battery packaging method, include the following steps:
(a) polymer battery core is first placed on interior of shell, while positive pole ear is passed through into first through hole；
(b) then sealing ring is entangled to the outer ring of nut cap, the closed end of nut cap withstands the Ka Jinchu, will have sealing ring
Nut cap cover the upper end of polymer battery core, while negative lug is passed through into the second through-hole；
(b) open end of shell is then squeezed into bending toward inside using jig, sealing ring closely will
Shell and cap sealed；
(d) finally positive pole ear is welded on shell by Laser Welding respectively, negative lug is welded on by Laser Welding
In nut cap.
Beneficial effects of the present invention: (1) by the way that positive pole ear, negative lug are welded on shell and nut cap by Laser Welding
On, that is, shell, nut cap are directlyed adopt as positive and negative anodes and exports electric current and voltage outward, so that the volume of battery is smaller, are more suitable for
In production minor items；(2) shell, nut cap use the sheet metal with a thickness of 0.2-0.3mm, on the one hand can be in original volume
Increase interior polymer battery core capacity under situation, on the other hand can play the role of electromagnetism interference, and can also play very
Heat dissipation effect well, while stainless-steel sheet mechanical strength is good, can be good at the polymer battery core inside protection；(3) outside
Setting protrusion or wavy in shell surface can avoid hitting when in use and damage the battery bring, extend making for battery
Use the service life；(4) using having the function of the displacement that the sealing ring of anti-avulsion tooth can effectively prevent sealing ring to generate due to pressure, make
With safer；(5) new assembly method is used, simple and quick can effectively encapsulate polymer battery, and the packaging method is close
Envelope property is good, effectively avoids the generation of leakage.
The present invention has many advantages, such as small in size, light weight, prevents leakage, strong interference immunity.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is structure of the invention perspective view of the explosion one；
Fig. 3 is structure of the invention perspective view of the explosion two；
Fig. 4 is the structural schematic diagram of embodiment；
Fig. 5 is the cross-sectional view of Fig. 1；
Fig. 6 is the structural schematic diagram of sealing ring；
In figure, 1- shell, 2- polymer battery core, 3- nut cap, 4- sealing ring, 101- first through hole, 102- protrusion, 201- is just
Pole tab, 202- negative lug, the second through-hole of 301-, 401- anti-avulsion tooth, 402- card muscle.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Embodiment 1
As shown in Figure 1, Figure 2 and Fig. 3 shown in, one kind can jamproof polymer battery, including polymer battery core 2, for holding
Carry shell 1 and the nut cap 3 of the polymer battery core, the open end of the shell 1 towards curving inwardly, the nut cap 3 with it is described outer
1 junction of shell is equipped with sealing ring 4, and one end of the sealing ring 4 is equipped with card muscle 402, when it is implemented, 3 outer wall of nut cap is equipped with spiral shell
Line, sealing ring inner wall are equipped with screw thread, and positive pole ear 201 and negative lug 202 are provided in the polymer battery core 2, described outer
Shell 1 is equipped with the first through hole 101 that the positive pole ear 201 can be allowed to pass through, and the nut cap 3, which is equipped with, can allow the negative lug
202 the second through-holes 301 passed through, when it is implemented, the negative lug 202 is welded in nut cap 3 by Laser Welding, it is described just
Pole tab 201 is by being laser-welded on shell 1, directly that nut cap 3 is defeated as cathode directly by shell 1 as anode output
Out, battery structure overall volume is reduced, so that weight is decreased, more suitable for producing minor items；The polymer battery core 2
For cylindrical or cuboid, however, it is not limited to this.
Embodiment 2
As shown in figure 4, the present embodiment is to be further optimized on the basis of embodiment 1, outside the specifically described shell
Portion be equipped with several protrusions or the shell exterior be it is wavy, certain buffer function, effective protection electrostrictive polymer can be played
Core avoids being knocked, and reduces the service life.
As a preferred solution of the present invention, the sealing ring surface is equipped with screw thread, in assembly, enables to battery structure
Sealing performance it is more preferable.
Embodiment 3
As shown in fig. 6, the present embodiment is further optimized on the basis of implementing 1, the specifically described sealing ring table
Face is equipped with screw thread or anti-avulsion tooth, when it is implemented, the cross-sectional shape of the anti-avulsion tooth can be processed into triangle, trapezoidal, square
Shape, wavy one or more, wherein waveform can be processed into damped wave peak shape, after being used for a long time, in shell
Certain pressure will be generated in chamber, design anti-avulsion tooth, sealing performance is more excellent, and can prevent the effect due to pressure from causing
Shifting phenomena.
Embodiment 4
The present embodiment advanced optimizes on the basis of embodiment 2, described outer particular as preferred embodiment of the invention
Shell with a thickness of 0.25mm, the nut cap with a thickness of 0.25mm, inner space is bigger, and battery capacity can be also improved.
When it is implemented, the shell and nut cap use plastics or rubber using stainless steel material and/or the sealing ring
Glue.On the one hand it can increase interior polymer battery core capacity in the case of original volume, on the other hand can play anti-electromagnetism
The effect of interference, and heat dissipation effect well can also be played, while stainless-steel sheet mechanical strength is good, it can be good at protecting
Internal polymer battery core.
Embodiment 5
It is as shown in Figure 5: it is a kind of can jamproof polymer battery packaging method, include the following steps:
(a) first polymer battery core 2 is placed on inside shell 1, while positive pole ear 201 is passed through into first through hole 101；
(b) then sealing ring 4 is entangled to the outer ring of nut cap 3, the closed end of nut cap 3 is withstood at the card muscle 402, by band
There is the nut cap 3 of sealing ring 4 to cover the upper end of polymer battery core 2, while negative lug 202 is passed through into the second through-hole 301；
(b) open end of shell 1 is then squeezed into bending toward inside using jig, enables sealing ring 4 close
Shell 1 and nut cap 3 are sealed；
(d) finally positive pole ear 201 is welded on shell 1 by Laser Welding respectively, negative lug 202 passes through laser
It is welded in nut cap 3.
The present invention uses new assembly method, simple and quick can effectively encapsulate polymer battery, and the packaging method is close
Envelope property is good, effectively avoids the generation of leakage.
The present invention has many advantages, such as small in size, light weight, prevents leakage, strong interference immunity.
Above-described embodiment only describes the optimal usage mode of existing equipment, and similar conventional machinery means is used to replace this reality
The element in example is applied, protection scope is each fallen within.
Claims (10)
1. one kind can jamproof polymer battery, it is characterised in that: including polymer battery core (2), for carrying the polymer
The shell (1) of battery core (2) and nut cap (3), the open end of the shell (1) is towards curving inwardly, the nut cap (3) and described outer
Shell (1) junction is equipped with sealing ring (4), and described sealing ring (4) one end is equipped with card muscle (402), sets on the polymer battery core (2)
It is equipped with positive pole ear (201) and negative lug (202), the shell (1), which is equipped with, can allow the positive pole ear (201) to pass through
First through hole (101), the nut cap (3) are equipped with the second through-hole (301) that the negative lug (202) can be allowed to pass through.
2. one kind according to claim 1 can jamproof polymer battery, it is characterised in that: the negative lug
(202) it is welded on nut cap (3) by Laser Welding.
3. one kind according to claim 2 can jamproof polymer battery, it is characterised in that: the positive pole ear
(201) by being laser-welded on shell (1).
4. one kind according to claim 3 can jamproof polymer battery, it is characterised in that: the polymer battery core
It (2) is cylindrical or cuboid.
5. one kind according to claim 4 can jamproof polymer battery, it is characterised in that: the shell (1) is external
External equipped with several raised (102) or the shell (1) is wavy.
6. one kind according to claim 5 can jamproof polymer battery, it is characterised in that: sealing ring (4) table
Face is equipped with screw thread or anti-avulsion tooth (401).
7. one kind according to claim 6 can jamproof polymer battery, it is characterised in that: the anti-avulsion tooth (401)
Cross-sectional shape be selected from triangle, trapezoidal, rectangle, wavy one or more.
8. one kind according to claim 7 can jamproof polymer battery, it is characterised in that: the thickness of the shell (1)
Degree is 0.2-0.3mm and/or the nut cap (3) with a thickness of 0.2-0.3mm.
9. one kind according to claim 8 can jamproof polymer battery, it is characterised in that: the shell (1) and lid
Cap (3) uses plastics or rubber using stainless steel material and/or the sealing ring (4).
10. according to claim 1~9 one kind described in any one can jamproof polymer battery packaging method, it is special
Sign is: including the following steps:
(a) polymer battery core (2) is first placed on shell (1) inside, while positive pole ear (201) is passed through into first through hole (101)；
(b) sealing ring (4) is then entangled to the outer ring of nut cap (3), the closed end of nut cap (3) is withstood at the card muscle (402), will
Nut cap (3) with sealing ring (4) covers the upper end of polymer battery core (2), while negative lug (202) are passed through the second through-hole
(301)；
(b) open end of shell (1) is then squeezed into bending toward inside using jig, so that sealing ring (4) can be close
Shell (1) and nut cap (3) is sealed；
(d) finally positive pole ear (201) is welded on shell (1) by Laser Welding respectively, negative lug (202) passes through laser
It is welded on nut cap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811284941.7A CN109346626A (en) | 2018-10-31 | 2018-10-31 | One kind can jamproof polymer battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811284941.7A CN109346626A (en) | 2018-10-31 | 2018-10-31 | One kind can jamproof polymer battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109346626A true CN109346626A (en) | 2019-02-15 |
Family
ID=65313090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811284941.7A Pending CN109346626A (en) | 2018-10-31 | 2018-10-31 | One kind can jamproof polymer battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN109346626A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111009625A (en) * | 2019-12-30 | 2020-04-14 | 广东微电新能源有限公司 | Energy storage device |
| CN111477775A (en) * | 2020-03-31 | 2020-07-31 | 惠州市恒泰科技股份有限公司 | Button battery with soft package inner core |
| CN112467263A (en) * | 2020-09-29 | 2021-03-09 | 昆山兴能能源科技有限公司 | Plastic battery and production method thereof |
| CN114050229A (en) * | 2021-11-11 | 2022-02-15 | 惠州赣锋锂电科技有限公司 | Pole piece and preparation method and application thereof |
| EP4187658A4 (en) * | 2020-09-17 | 2024-04-24 | LG Energy Solution, Ltd. | Button-type secondary battery |
| EP4181280A4 (en) * | 2020-09-17 | 2024-04-24 | LG Energy Solution, Ltd. | Button-type secondary battery |
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