JP4413338B2 - Battery bag - Google Patents

Battery bag Download PDF

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Publication number
JP4413338B2
JP4413338B2 JP30606199A JP30606199A JP4413338B2 JP 4413338 B2 JP4413338 B2 JP 4413338B2 JP 30606199 A JP30606199 A JP 30606199A JP 30606199 A JP30606199 A JP 30606199A JP 4413338 B2 JP4413338 B2 JP 4413338B2
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Japan
Prior art keywords
bag
seal portion
battery
bag body
line
Prior art date
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JP30606199A
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Japanese (ja)
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JP2001126683A (en
Inventor
宏和 飯塚
実 高田
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Fujimori Kogyo Co Ltd
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Fujimori Kogyo Co Ltd
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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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  • Sealing Battery Cases Or Jackets (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、電池の容器に使用される電池用袋体（以下、袋体と略称する。）に関する。
【０００２】
【従来の技術】
近年、電池の小型軽量化に対する要求に応じ、電池の容器として、従来の筐体に換え、袋体が使用されつつある。また、この袋体の材料には、防水性や遮光性等に優れた、アルミラミネートフィルム（以下、フィルムと略称する。）が使用されている。
【０００３】
従来の袋体及び電池の製造工程の一例を図５に示す。袋体の製造に際しては、図中（１）に示すように、矩形状をなすフィルム１を、その長手方向中央部で二つ折りして折れ線１ａを形成した後、図中（２）に示すように、対向するフィルム１同士を、折れ線１ａの両端側に位置する側縁部にてシールし、シール部２を形成する。その結果、二つ折りされたフィルム１とシール部２とで囲まれた空間Ｓを有する袋体３が得られる。袋体３をこのように製袋する理由は、袋体の底部及び両端部にシール部が形成される三方袋に比べ、内容物（後述）封入のための装置が簡易化され、かつ袋体３のサイズも小さくて済むためである。
【０００４】
電池の製造に際しては、得られた袋体３内に電極等の内容物（図示せず。）を投入後、袋体３の開口端を、符号４で示すように熱シール等にて閉鎖する。その結果、図中（３）に示すように、上記内容物が袋体３内に封入された電池５が得られる。また、符号６は、袋体３の開口端から外部に突出する端子である。この電池５は、サイズを小さくする目的で、図中（４）に示すように、袋体３の、シール部２の内側に位置する側縁部を内方に折り畳んで使用される。
【０００５】
【発明が解決しようとする課題】
ところで、電池の場合、袋体３内への水分の侵入を極度に嫌うもの（例えば電解液に有機電解質を使用した、リチウムイオン電池、リチウムポリマー電池、あるいは電気二重層キャパシタ等）がある。従って、電池の容器に使用される袋体３の場合、フィルム１内に積層されているアルミ箔には、通常の袋体における厚さ６〜１２μｍ程度のものより厚い、厚さ２０μｍ程度のものが使用される。その結果、（４）に示すように、袋体３の両端部をシール部２の内側にて折り畳んだ際に、折れ線１ａと、折り畳みにより形成される稜片部Ｃとの交差部位に形成された角部（図に矢印Ａで示す部分）にて、折り曲げられたアルミ箔にピンホールや亀裂が生じ、この角部Ａから水分や光等が袋体３の内部に侵入する可能性があった。また、シール部２の形成に際しては十分に加熱加圧するのであるが、それでも折れ線１ａを確実に潰すことが困難で、その結果、折れ線１ａ自身が、袋体３の内外を導通させるピンホールとなる可能性もあった。本発明は上記事情に鑑みてなされたもので、上記アルミ箔における、上記角部の形成に伴うピンホールや亀裂の発生防止をその目的としている。
【０００６】
【課題を解決するための手段】
本発明は、折れ線で二つ折りされたフィルムの対向面を、上記折れ線の両端側に位置する側縁部にてシールし、更に上記シール部の内側に位置する側縁部を折り畳んで形成される電池用袋体であって、上記フィルムの、上記折れ線と、上記折り畳みにより形成される稜線との交差部位に、上記フィルムの対向面同士をシールする第二のシール部が形成されていることを特徴としている。
【０００７】
この場合、上記第二のシール部が、上記折れ線の全域にわたり形成されていてもよい。
【０００８】
また、上記第二のシール部が、上記折れ線の両端側のそれぞれにおいて、上記折れ線と上記側縁部のシール部との隅部に斜めに形成されていてもよい。
また、上記第二のシール部により形成された上記袋体の底面が半円状をなしていてもよい。
【０００９】
【発明の実施の形態】
以下、図面に基づき、本発明の実施形態について説明する。なお、以下の説明中、上記従来の袋体３または電池５と同様の構成を有する部分には、同一の符号を付して、その説明を省略する。
【００１０】
本発明に係る袋体及びこの袋体を用いた電池の製造工程の一例を図１に示す。袋体の製造に際しては、まず、上記従来の袋体３と同様、図中（１）に示すように、矩形状をなすフィルム１を、その長手方向中央部で二つ折りした後、図中（２）に示すように、対向するフィルム１同士を、折れ線１ａの両端側に位置する側縁部にてシールし、シール部２を形成する。その結果、従来の袋体３と同様の袋体が作成される。
【００１１】
更に、本発明に係る袋体では、対向するフィルム１同士を、折れ線１ａから所定の幅Ｗで折れ線１ａに沿ってシールし、袋体の底部に、折れ線１ａの全域にわたり、第二のシール部７を形成する。その結果、図中（３）に示すように、シール部２と第二のシール部７とで囲まれた空間Ｓ′を有する袋体３１が得られる。
【００１２】
電池の製造に際しては、得られた袋体３１内に電極等の内容物（図示せず。）を投入後、袋体３１の開口端を、上記従来の袋体３と同様、符号４で示すように熱シール等にて閉鎖する。その結果、図中（４）に示すように、上記内容物が袋体３１内に封入された電池５１が得られる。この電池５１は、上記従来の電池５と同様、図中（５）に示すように、シール部２の内側に位置する側縁部を内方に折り畳んで使用される。
【００１３】
本発明に係る袋体３１の場合、袋体３１の底部に第二のシール部７が形成されているため、折れ線１ａは、フィルム１を２枚積層した状態となっている。従って、折れ線１ａの機械的強度は、従来の袋体３に比べ、フィルム１の積層分だけ向上する。しかも、折れ線１ａを折り曲げた際の屈曲径が、フィルム１の積層による厚み増加分だけ大きくなる。その結果、上記（５）に示すように、袋体３１の両端部をシール部２の内側にて折り畳んだ場合でも、稜線Ｃと折れ線１ａとの交差部位に形成された角部Ａにて、折り曲げられたフィルム１内に積層されているアルミ箔にピンホールや亀裂が生じることはない。また、万が一、折れ線１ａ（特に角部Ａ）にピンホールや亀裂が生じた場合でも、袋体３１の内部と上記ピンホールや亀裂との連通が、折れ線１ａと袋体３１の内部とを隔絶する第二のシール部７の存在により防止されるため、袋体３１の内部への影響はない。すなわち、本発明によれば、角部Ａにおけるピンホールや亀裂の発生と、それに起因する角部Ａから袋体３の内部への水分や光の侵入が防止される。
【００１４】
但し、空間Ｓ′の容積を確保するためには、第二のシール部７の幅Ｗを可能な限り小さくすることが望ましい。因みに、液体が封入される袋体の場合、一般に、シール部には３ｍｍ程度の巾が必要とされているが、本発明における第二のシール部７は、袋体３１の密封を目的とするものではなく、稜線Ｃと折れ線１ａとの交差部位における欠陥の発生防止を目的とするものであるため、その巾は１ｍｍ以下であっても差し支えない。また、この袋体３１においても、従来の袋体３と同様、袋体３１の底部が折れ線１ａにて形成されているため、袋体３１の底部に形成された第二のシール部７が十分な接着強度を有していなくても、袋体３の底部から液漏れ等が生じることはない。
【００１５】
なお、上記実施形態では、第二のシール部７を、折れ線１ａの全域にわたり形成したが、第二のシール部７は、少なくとも折れ線１ａと袋体３１の折り畳み箇所との交差部位に形成されていれば、その効果を発揮する。
【００１６】
図２ないし図４はそのような例を示すものである。これらの例では、折れ線１ａの両端部にのみ第二のシール部７が形成され、これら第二のシール部７により、折れ線１ａと、袋体３１の折り畳み箇所（図中点線Ｆで示す箇所）との交差部位（図中矢印Ｂで示す部位）がシールされている。図２の例は、第二のシール部７を、折れ線１ａの両端部を斜めに横断するよう形成した場合、図３の例は、第二のシール部７を、第二のシール部７により形成される袋体３１の底面が半円状をなすよう形成した場合の例である。また、図４の例は、折れ線１ａと袋体３１の折り畳み箇所との交差部位Ｂにのみ、第二のシール部７を、シール部２と重ならないようそれぞれ形成した場合の例である。第二のシール部７をこのように形成することにより、従来の袋体５と同様のサイズで、しかもピンホール等の欠陥が生じにくい袋体３１が得られる。
【００１７】
更に、例えば図２及び図３に示すように、第二のシール部７により形成された袋体３１の底面と、袋体３１内に封入される電極の底面とを略同一形状とすることにより、袋体３１の底面と電極の底面との間のデッドスペースが少なくて済み、空間Ｓ′を有効利用できるという効果が得られる。図２の場合、折れ線１ａの両端部を斜めに横断する第二のシール部７により形成された袋体３１の底面形状に応じ、電極８の底面に、底面の両端部を斜めに切り欠いてなる切欠８ａが形成されている。また、図３の場合、第二のシール部７により形成された、半円状をなす袋体３１の底面に応じ、電極８の底面も半円状に成形されている。もちろん、図４に示すように、袋体３１の底面形状と電極８の底面とを一致させなくても差し支えない。
【００１８】
なお、本発明に係る袋体３１の形状及び第二のシール部７によるシール範囲、あるいは袋体３１の底面形状等は、必ずしも上記実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、種々の変形が可能であることは言うまでもない。
【００１９】
【発明の効果】
以上説明した通り、本発明に係る袋体の場合、第二のシール部の形成により、袋体の底部の機械的強度が向上する。その結果、上記底部の折り畳みに伴う、上記底部を構成するフィルム内に積層されているアルミ箔におけるピンホールや亀裂の発生及び、それらに起因する袋体の内部への水分や光の侵入が防止される。
【図面の簡単な説明】
【図１】 本発明に係る袋体及び電池の製造工程の一例を示す図である。
【図２】 本発明に係る袋体の形状の一例を示す図である。
【図３】 本発明に係る袋体の形状の一例を示す図である。
【図４】 本発明に係る袋体の形状の一例を示す図である。
【図５】 従来の袋体及び電池の製造工程の一例を示す図である。
【符号の説明】
１ フィルム（アルミラミネートフィルム）
１ａ 折れ線
２ シール部
７ 第二のシール部
８ 電極
３１ 袋体（電池用袋体）
５１ 電池[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a battery bag body (hereinafter abbreviated as a bag body) used for a battery container.
[0002]
[Prior art]
In recent years, a bag body is being used instead of a conventional casing as a battery container in response to a demand for a reduction in size and weight of a battery. In addition, an aluminum laminate film (hereinafter abbreviated as a film) that is excellent in waterproofness, light shielding property, and the like is used as the material of the bag.
[0003]
An example of a conventional bag and battery manufacturing process is shown in FIG. When manufacturing the bag body, as shown in (1) in the figure, the film 1 having a rectangular shape is folded in half at the center in the longitudinal direction to form a fold line 1a, and then shown in (2) in the figure. Then, the opposing films 1 are sealed at the side edge portions located on both ends of the polygonal line 1 a to form the seal portion 2. As a result, a bag 3 having a space S surrounded by the folded film 1 and the seal portion 2 is obtained. The reason for making the bag 3 in this way is that the device for enclosing the contents (described later) is simplified compared to the three-sided bag in which seal portions are formed at the bottom and both ends of the bag, and the bag This is because the size of 3 can be small.
[0004]
When the battery is manufactured, contents (not shown) such as electrodes are put into the obtained bag 3, and the open end of the bag 3 is closed with a heat seal or the like as indicated by reference numeral 4. . As a result, as shown in (3) in the figure, the battery 5 in which the contents are enclosed in the bag 3 is obtained. Reference numeral 6 denotes a terminal protruding outward from the opening end of the bag body 3. For the purpose of reducing the size, the battery 5 is used by folding the side edge portion of the bag body 3 located inside the seal portion 2 inward as shown in (4) in the figure.
[0005]
[Problems to be solved by the invention]
By the way, in the case of a battery, there is a battery (such as a lithium ion battery, a lithium polymer battery, or an electric double layer capacitor in which an organic electrolyte is used as an electrolytic solution) that extremely dislikes the penetration of moisture into the bag 3. Therefore, in the case of the bag 3 used for the battery container, the aluminum foil laminated in the film 1 has a thickness of about 20 μm, which is thicker than the normal bag having a thickness of about 6 to 12 μm. Is used. As a result, as shown in (4), when both end portions of the bag body 3 are folded inside the seal portion 2, it is formed at the intersection of the fold line 1a and the ridge piece portion C formed by folding. There is a possibility that pinholes and cracks will occur in the bent aluminum foil at the corners (indicated by arrows A in the figure), and moisture, light, etc. may enter the bag 3 from the corners A. It was. In addition, when the seal portion 2 is formed, it is sufficiently heated and pressurized, but it is still difficult to reliably crush the broken line 1a, and as a result, the broken line 1a itself becomes a pinhole for conducting the inside and outside of the bag body 3. There was also a possibility. The present invention has been made in view of the above circumstances, and an object thereof is to prevent the occurrence of pinholes and cracks associated with the formation of the corners in the aluminum foil.
[0006]
[Means for Solving the Problems]
The present invention is formed by sealing the opposing surfaces of a film folded in two at a polygonal line with side edges located at both ends of the polygonal line, and further folding the side edge located inside the seal. It is a battery bag body, and the second seal part for sealing the opposing surfaces of the film is formed at the intersection of the fold line and the ridge line formed by folding of the film. It is a feature.
[0007]
In this case, the second seal portion may be formed over the entire broken line.
[0008]
In addition, the second seal portion may be formed obliquely at corners of the fold line and the seal portion at the side edge on each of both end sides of the fold line.
The bottom surface of the bag formed by the second seal portion may be semicircular .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, parts having the same configurations as those of the conventional bag 3 or battery 5 are given the same reference numerals, and the description thereof is omitted.
[0010]
An example of the manufacturing process of the bag which concerns on this invention, and the battery using this bag is shown in FIG. In manufacturing the bag body, first, like the conventional bag body 3, as shown in (1) in the figure, the rectangular film 1 is folded in half at the center in the longitudinal direction, and then in the figure ( As shown in 2), the opposing films 1 are sealed at the side edge portions located on both ends of the polygonal line 1 a to form the seal portion 2. As a result, a bag similar to the conventional bag 3 is created.
[0011]
Furthermore, in the bag according to the present invention, the opposing films 1 are sealed along the fold line 1a with a predetermined width W from the fold line 1a, and the second seal portion is formed over the entire area of the fold line 1a at the bottom of the bag body. 7 is formed. As a result, as shown in (3) in the figure, a bag body 31 having a space S ′ surrounded by the seal portion 2 and the second seal portion 7 is obtained.
[0012]
In manufacturing the battery, after the contents (not shown) such as electrodes are put into the obtained bag 31, the open end of the bag 31 is denoted by reference numeral 4 as in the conventional bag 3. Close with a heat seal or the like. As a result, as shown in (4) in the figure, a battery 51 in which the contents are enclosed in the bag 31 is obtained. Similar to the conventional battery 5, the battery 51 is used by folding the side edge portion located inside the seal portion 2 inward as shown in FIG.
[0013]
In the case of the bag body 31 according to the present invention, since the second seal portion 7 is formed at the bottom of the bag body 31, the broken line 1 a is in a state where two films 1 are laminated. Therefore, the mechanical strength of the broken line 1a is improved by the amount of the laminated film 1 as compared with the conventional bag 3. Moreover, the bending diameter when the broken line 1 a is bent increases by the thickness increase due to the lamination of the film 1. As a result, as shown in the above (5), even when both end portions of the bag body 31 are folded inside the seal portion 2, at the corner portion A formed at the intersection of the ridge line C and the broken line 1a, Pinholes and cracks do not occur in the aluminum foil laminated in the folded film 1. Even if a pinhole or crack occurs in the broken line 1a (especially the corner A), the communication between the inside of the bag body 31 and the pinhole or crack isolates the broken line 1a from the inside of the bag body 31. This is prevented by the presence of the second seal portion 7 that does not affect the inside of the bag body 31. That is, according to the present invention, the occurrence of pinholes and cracks at the corners A, and the intrusion of moisture and light from the corners A into the bag 3 due to the pinholes are prevented.
[0014]
However, in order to secure the volume of the space S ′, it is desirable to make the width W of the second seal portion 7 as small as possible. Incidentally, in the case of a bag body in which a liquid is sealed, generally, the seal portion needs to have a width of about 3 mm, but the second seal portion 7 in the present invention aims at sealing the bag body 31. However, the width is 1 mm or less because the purpose is to prevent the occurrence of defects at the intersection of the ridge line C and the broken line 1a. Also in this bag body 31, as in the case of the conventional bag body 3, since the bottom portion of the bag body 31 is formed by the broken line 1 a, the second seal portion 7 formed at the bottom portion of the bag body 31 is sufficient. Even if the adhesive strength is not high, liquid leakage or the like does not occur from the bottom of the bag 3.
[0015]
In addition, in the said embodiment, although the 2nd seal | sticker part 7 was formed over the whole region of the broken line 1a, the 2nd seal part 7 is formed in the cross | intersection part of the folded line 1a and the folding location of the bag body 31 at least. If so, the effect is demonstrated.
[0016]
2 to 4 show such an example. In these examples, the second seal portion 7 is formed only at both end portions of the broken line 1a, and the folded portion 1a and the folded portion of the bag body 31 (the portion indicated by the dotted line F in the figure) are formed by these second seal portions 7. The crossing part (part shown by the arrow B in the figure) is sealed. In the example of FIG. 2, when the second seal portion 7 is formed so as to obliquely cross both ends of the broken line 1 a, the example of FIG. 3, the second seal portion 7 is replaced by the second seal portion 7. This is an example in which the bottom surface of the formed bag body 31 is formed so as to form a semicircular shape. The example of FIG. 4 is an example in which the second seal portion 7 is formed only at the intersection B between the folding line 1 a and the folded portion of the bag body 31 so as not to overlap the seal portion 2. By forming the second seal portion 7 in this way, a bag body 31 having the same size as that of the conventional bag body 5 and hardly causing defects such as pinholes can be obtained.
[0017]
Further, for example, as shown in FIGS. 2 and 3, the bottom surface of the bag body 31 formed by the second seal portion 7 and the bottom surface of the electrode sealed in the bag body 31 are made substantially the same shape. The dead space between the bottom surface of the bag 31 and the bottom surface of the electrode can be reduced, and the effect that the space S ′ can be used effectively is obtained. In the case of FIG. 2, both end portions of the bottom surface are diagonally cut out on the bottom surface of the electrode 8 in accordance with the bottom surface shape of the bag body 31 formed by the second seal portion 7 that obliquely crosses both end portions of the broken line 1 a. A notch 8a is formed. In the case of FIG. 3, the bottom surface of the electrode 8 is also formed in a semicircular shape according to the bottom surface of the semicircular bag body 31 formed by the second seal portion 7. Of course, as shown in FIG. 4, the shape of the bottom surface of the bag 31 and the bottom surface of the electrode 8 do not have to be matched.
[0018]
In addition, the shape of the bag body 31 according to the present invention and the sealing range by the second seal portion 7 or the shape of the bottom surface of the bag body 31 are not necessarily limited to the above embodiments, and depart from the spirit of the present invention. It goes without saying that various modifications are possible without departing from the scope.
[0019]
【The invention's effect】
As described above, in the case of the bag according to the present invention, the formation of the second seal portion improves the mechanical strength of the bottom of the bag. As a result, it is possible to prevent pinholes and cracks in the aluminum foil laminated in the film constituting the bottom, and the intrusion of moisture and light into the bag due to the folding of the bottom. Is done.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a manufacturing process of a bag and a battery according to the present invention.
FIG. 2 is a diagram showing an example of the shape of a bag according to the present invention.
FIG. 3 is a diagram showing an example of the shape of a bag according to the present invention.
FIG. 4 is a diagram showing an example of the shape of a bag according to the present invention.
FIG. 5 is a diagram showing an example of a conventional bag body and battery manufacturing process.
[Explanation of symbols]
1 Film (aluminum laminate film)
1a Polygonal line 2 Seal part 7 Second seal part 8 Electrode 31 Bag (Battery bag)
51 battery

Claims (4)

折れ線で二つ折りされたフィルムの対向面を、上記折れ線の両端側に位置する側縁部にてシールし、更に上記シール部の内側に位置する側縁部を折り畳んで形成される電池用袋体であって、上記フィルムの、上記折れ線と、上記折り畳みにより形成される稜線との交差部位に、上記フィルムの対向面同士をシールする第二のシール部が形成されていることを特徴とする電池用袋体。  A battery bag formed by sealing the opposing surfaces of a film folded in two at a polygonal line with side edges located on both ends of the polygonal line, and further folding the side edge located inside the seal. The battery is characterized in that a second seal portion for sealing the opposing surfaces of the film is formed at the intersection of the fold line and the ridge line formed by folding of the film. Bag body. 上記第二のシール部が、上記折れ線の全域にわたり形成されていることを特徴とする請求項１に記載の電池用袋体。  The battery bag according to claim 1, wherein the second seal portion is formed over the entire area of the broken line. 上記第二のシール部が、上記折れ線の両端側のそれぞれにおいて、上記折れ線と上記側縁部のシール部との隅部に斜めに形成されていることを特徴とする請求項１に記載の電池用袋体。2. The battery according to claim 1 , wherein the second seal portion is formed obliquely at corners of the broken line and the seal portion of the side edge portion at each of both end sides of the broken line. Bag body. 上記第二のシール部により形成された上記袋体の底面が半円状をなしていることを特徴とする請求項１に記載の電池用袋体。2. The battery bag according to claim 1 , wherein a bottom surface of the bag formed by the second seal portion has a semicircular shape .
JP30606199A 1999-10-27 1999-10-27 Battery bag Expired - Lifetime JP4413338B2 (en)

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Publication number Priority date Publication date Assignee Title
JP4621325B2 (en) * 2000-01-19 2011-01-26 株式会社東芝 Thin battery
CN101174681B (en) 2006-10-30 2010-05-12 比亚迪股份有限公司 Pole piece complex body, electric core and lithium ion battery
CN101453002A (en) 2007-11-29 2009-06-10 比亚迪股份有限公司 Battery and method for preparing the same
CN201146200Y (en) 2007-12-18 2008-11-05 比亚迪股份有限公司 Casing for battery and battery set including the same
US8276695B2 (en) 2007-12-25 2012-10-02 Byd Co. Ltd. Battery electrode sheet
US8420254B2 (en) 2007-12-25 2013-04-16 Byd Co. Ltd. End cover assembly for an electrochemical cell
US8193770B2 (en) 2007-12-25 2012-06-05 BYD Co. Ltd Battery system for a vehicle having an over-current/over-temperature protective feature
US8404379B2 (en) 2007-12-25 2013-03-26 Byd Co., Ltd. Vehicle with a battery system
JP2012064459A (en) * 2010-09-16 2012-03-29 Hitachi Maxell Energy Ltd Nonaqueous electrolyte battery
KR102367387B1 (en) * 2017-08-29 2022-02-24 주식회사 엘지에너지솔루션 Method for Sealing Side Part of Pouch-Type Battery Comprising Two Sealing Steps
KR102414770B1 (en) * 2017-10-18 2022-06-30 주식회사 엘지에너지솔루션 The Tape For Pouch And The Secondary Battery Attached The Thereof
KR20200109147A (en) * 2019-03-12 2020-09-22 에스케이이노베이션 주식회사 Pouch-type secondary battery and battery module having thereof
CN210040267U (en) * 2019-07-08 2020-02-07 江苏时代新能源科技有限公司 Secondary battery
KR20210150865A (en) * 2020-06-04 2021-12-13 주식회사 엘지에너지솔루션 Secondary battery and manufacturing method thereof

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