JPH11260327A - Thin battery - Google Patents
Thin batteryInfo
- Publication number
- JPH11260327A JPH11260327A JP10057937A JP5793798A JPH11260327A JP H11260327 A JPH11260327 A JP H11260327A JP 10057937 A JP10057937 A JP 10057937A JP 5793798 A JP5793798 A JP 5793798A JP H11260327 A JPH11260327 A JP H11260327A
- Authority
- JP
- Japan
- Prior art keywords
- sealing
- sealing portion
- battery
- laminate
- bent
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、薄型電池に関し、
詳しは、シート状のラミネート材で構成される外装体を
有し、この外装体は、発電要素を収納した外装体本体部
と、外装体本体部の頂部を封止する第１封止部と、外装
体本体部の底部を封止する第２封止部と、外装体本体部
の側端部を封止する第３封止部とから構成され、しか
も、前記第１封止部は、前記発電要素を構成する正負極
板にそれぞれ付設された集電タブが、電池外に導出して
いる状態で封止された構造の薄型電池に関する。The present invention relates to a thin battery,
Specifically, it has an exterior body composed of a sheet-like laminate material, and the exterior body includes an exterior body main body containing a power generation element, and a first sealing portion that seals a top portion of the exterior body main body. A second sealing portion that seals a bottom portion of the exterior body main portion, and a third sealing portion that seals a side end portion of the exterior body main portion, and the first sealing portion includes: The present invention relates to a thin battery having a structure in which current collecting tabs respectively attached to positive and negative electrode plates constituting the power generating element are sealed in a state of being led out of the battery.
【０００２】[0002]
【従来の技術】近年、電子機器等の小型化に伴って、電
池の小型化が望まれるようになってきている。この電池
の小型化を達成するために、本発明者らは、先に、アル
ミニウム層の両面に接着剤層を介して樹脂層が形成され
たラミネート材を袋状にしてラミネート外装体を構成
し、このラミネート外装体の収納空間に発電要素を収納
するような薄型電池を提案した。このような構造の電池
であれば、飛躍的に電池の小型化を達成できる。2. Description of the Related Art In recent years, as electronic devices and the like have become smaller, it has been desired to reduce the size of batteries. In order to achieve the miniaturization of the battery, the present inventors first formed a laminate outer body by forming a laminate material in which a resin layer was formed on both sides of an aluminum layer via an adhesive layer in a bag shape. Proposed a thin battery in which a power generation element is stored in the storage space of the laminate exterior body. With a battery having such a structure, the size of the battery can be dramatically reduced.
【０００３】ところで、上記構造の電池では、ラミネー
ト材により発電要素を封止する必要があり、そのため、
ラミネート材の端部同士が溶着された封止構造を有して
いる。かかる封止構造を具体的に説明すれば、図１９に
示すように、外装体本体部３の頂部を封止する第１封止
部４ａと、外装体本体部３の底部を封止する第２封止部
４ｂと、外装体本体部３の側端部を封止する第３封止部
４ｃとから構成され、しかも、前記第１封止部４ａは、
前記発電要素を構成する正負極板にそれぞれ付設された
集電タブ５ａ，５ｂが、電池外に導出している状態で封
止された構造となっている。Incidentally, in the battery having the above structure, it is necessary to seal the power generation element with a laminate material.
It has a sealing structure in which the ends of the laminate are welded together. More specifically, as shown in FIG. 19, a first sealing portion 4a for sealing the top of the exterior body 3 and a second sealing portion for sealing the bottom of the exterior body 3 are provided. 2 sealing part 4b, and a third sealing part 4c for sealing the side end of the exterior body main part 3, and the first sealing part 4a is
Current collecting tabs 5a and 5b respectively attached to the positive and negative electrode plates constituting the power generating element are sealed in a state of being led out of the battery.
【０００４】このよう薄型電池では、上記の如く封止構
造を有するので、本質的に以下の要請がある。 封止部は、ラミネート材の端部同士を重ね合わせて接
着した部分であるので、ラミネート材の端面が外部に露
出している。このため、露出端面のうちの水分や酸素に
対する透過性の大きい接着剤層から、水分等が侵入し、
この水分等が、接着剤層を覆う樹脂層を通過して電池内
部に侵入して、電池特性の劣化を招く原因となってい
る。そこで、かかる問題を解決するため、封止部からの
水分等の侵入を可及的に低減することが、要請されてい
る。 また、体積エネルギー密度の向上を図ることも、本質
的な要請である。ここで、体積エネルギー密度とは、本
来的には、電池の体積に対する発電要素の全出力エネル
ギーの割合で定義されるものであるが、このような薄型
電池の分野においては、見かけ上の体積エネルギー密度
を用いている。ここに、見かけ上の体積エネルギー密度
とは、電池の最大縦、最大横、最大厚みに基づいて算出
した見かけ上の体積に対する発電要素の全出力エネルギ
ーの割合を意味する。図１９に示す従来の薄型電池を例
にして説明すれば、電池の縦は、外装体本体部の縦Ｌ１
と第１封止部の幅Ｍ１と第２封止部の幅Ｍ２をそれぞれ
加えた値（Ｌ１＋Ｍ１＋Ｍ２）であり、電池の横はＬ２
であり、電池の厚みは、Ｌ３である。よって、体積エネ
ルギー密度Ｗは、発電要素の全出力エネルギーをφとす
ると、以下の第１式で表される。 Ｗ＝エネルギーφ／｛（Ｌ１＋Ｍ１＋Ｍ２）・Ｌ２・Ｌ３｝ … （１）Since such a thin battery has a sealing structure as described above, there are essentially the following requirements. Since the sealing portion is a portion where the ends of the laminated material are overlapped and adhered, the end face of the laminated material is exposed to the outside. Therefore, moisture and the like intrude from the adhesive layer having high permeability to moisture and oxygen in the exposed end face,
This moisture or the like passes through the resin layer covering the adhesive layer and penetrates into the inside of the battery, causing deterioration of battery characteristics. Therefore, in order to solve such a problem, it is required to reduce intrusion of moisture and the like from the sealing portion as much as possible. It is also an essential requirement to improve the volume energy density. Here, the volume energy density is originally defined as the ratio of the total output energy of the power generating element to the battery volume, but in such a thin battery field, the apparent volume energy is Density is used. Here, the apparent volume energy density means the ratio of the total output energy of the power generation element to the apparent volume calculated based on the maximum length, maximum width, and maximum thickness of the battery. Taking the conventional thin battery shown in FIG. 19 as an example, the length of the battery is the length L1 of the exterior body main body.
And the width M1 of the first sealing portion and the width M2 of the second sealing portion, respectively (L1 + M1 + M2).
And the thickness of the battery is L3. Therefore, the volume energy density W is represented by the following first formula, where φ is the total output energy of the power generating element. W = energy φ / {(L1 + M1 + M2) · L2 · L3} (1)
【０００５】このような見かけ上の体積エネルギー密度
を用いるのは、以下の理由による。即ち、電子機器等の
電池収納空間は、電池の縦、横、厚み、の各々の最大長
さに対応した方形体状に形成されているので、電子機器
等の電池収納空間に則して体積エネルギー密度を算出す
るのが、電池の使用方法を考慮すれば実情に合致したも
のと考えられるからである。このようにして、上記構造
の薄型電池において、体積エネルギー密度としては、上
記定義するところの見かけ上の体積エネルギー密度が用
いられている。よって、本明細書においても、用語「体
積エネルギー密度」とは、上記定義するところの見かけ
上の体積エネルギー密度を意味するものとして使用する
ことにする。[0005] The use of such apparent volume energy density is based on the following reasons. That is, since the battery storage space of the electronic device or the like is formed in a rectangular shape corresponding to the maximum length of each of the vertical, horizontal, and thickness of the battery, the volume of the battery storage space according to the battery storage space of the electronic device or the like is increased. This is because the calculation of the energy density is considered to match the actual situation in consideration of the method of using the battery. As described above, in the thin battery having the above structure, the apparent volume energy density as defined above is used as the volume energy density. Therefore, also in this specification, the term “volume energy density” is used to mean the apparent volume energy density as defined above.
【０００６】しかしながら、従来の薄型電池では、封止
部が外装体本体部から突出形成されたままの状態である
ため、上記要請の観点から、以下の課題が生じていた。
即ち、封止部の幅が長い場合は、これに応じて電池の縦
長が大きくなり、体積エネルギー密度は減少することに
なる。封止部の幅が短い場合は、これに応じて電池の縦
長が小さくなり、体積エネルギー密度は増加することに
なる。よって、体積エネルギー密度の向上を図るという
観点からすれば、封止部は短い方が良いことになる。逆
に、封止部の幅が長い場合は、外部の水分等が侵入し難
く、電池性能の劣化を防止でき、封止部の幅が短い場合
は、短い分だけ外部の水分等が侵入し易くなり、水分等
の侵入に起因した電池性能の劣化を招くことになる。よ
って、水分等の侵入に起因した電池性能の劣化防止とい
う観点からすれば、封止部は長い方が良いことになる。
従って、従来例の封止部構造では、体積エネルギー密度
の向上及び水分等の侵入に起因した電池性能の劣化防止
という２つの要請のいずれか一方の要請しか満たすこと
ができず、２つの要請を同時に満たすことができなかっ
た。However, in the conventional thin battery, since the sealing portion is formed so as to protrude from the outer package body, the following problems have arisen from the viewpoint of the above demand.
That is, when the width of the sealing portion is long, the vertical length of the battery is correspondingly increased, and the volume energy density is reduced. When the width of the sealing portion is short, the vertical length of the battery is correspondingly reduced, and the volume energy density is increased. Therefore, from the viewpoint of improving the volume energy density, the shorter the sealing portion, the better. Conversely, if the width of the sealing portion is long, it is difficult for external moisture and the like to enter, and deterioration of battery performance can be prevented.If the width of the sealing portion is short, external moisture and the like enter by a short amount. The battery performance is likely to deteriorate due to the intrusion of moisture and the like. Therefore, from the viewpoint of preventing deterioration of battery performance due to intrusion of moisture or the like, a longer sealing portion is better.
Therefore, the conventional sealing structure can satisfy only one of the two requirements, that is, the improvement of the volume energy density and the prevention of the deterioration of the battery performance due to the invasion of moisture and the like. Could not meet at the same time.
【０００７】そこで、上記２つの要請を同時に満たすた
め、封止部を外装体本体の上面側に折り曲げて、この折
り曲げ部分を外装体本体の上面に密着させる構造が提案
されている。しかしながら、このような構造では、電池
の厚みが増加し、電池厚みが薄いという薄型電池の特徴
が失われる。更に、電池の厚みの増加により、体積エネ
ルギー密度の減少を招くことにもなる。[0007] In order to satisfy the above two requirements simultaneously, there has been proposed a structure in which the sealing portion is bent toward the upper surface of the exterior body, and the bent portion is brought into close contact with the upper surface of the exterior body. However, in such a structure, the thickness of the battery is increased, and the characteristic of the thin battery that the battery thickness is thin is lost. Furthermore, an increase in the thickness of the battery also causes a decrease in the volume energy density.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、以上の事情
に鑑みなされたものであって、外装体本体部に連なる封
止部の幅を短くすることなく、しかも電池厚みを増大す
ることなく、体積エネルギー密度を向上するようにした
薄型電池の提供を目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been made without reducing the width of a sealing portion connected to an exterior body main portion and without increasing the thickness of a battery. It is another object of the present invention to provide a thin battery having improved volume energy density.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明のうちで請求項１記載の発明は、シート状の
ラミネート材で構成される外装体を有し、この外装体
は、発電要素を収納した外装体本体部と、外装体本体部
の頂部を封止する第１封止部と、外装体本体部の底部を
封止する第２封止部と、外装体本体部の側端部を封止す
る第３封止部とから構成され、しかも、前記第１封止部
は、前記発電要素を構成する正負極板にそれぞれ付設さ
れた集電タブが、電池外に導出している状態で封止され
た構造の薄型電池において、前記第１〜第３封止部のう
ちの少なくともいずれかの封止部が、折り曲げられ、且
つ折り曲げ部分が外装体本体部の厚み範囲内に規制され
ていることを特徴とする。Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 of the present invention has an exterior body composed of a sheet-like laminate material, and this exterior body is used for power generation. An exterior body main body containing the elements, a first sealing portion sealing the top of the exterior body main portion, a second sealing portion sealing the bottom of the exterior body main portion, and a side of the exterior body main portion And a third sealing portion that seals an end portion. Further, the first sealing portion is configured such that current collecting tabs respectively attached to positive and negative electrode plates constituting the power generating element are led out of the battery. In the thin battery having a structure sealed in a state where at least one of the first to third sealing portions is bent, the bent portion is within a thickness range of the exterior body main portion. It is characterized by being regulated.
【００１０】上記の如く、第１〜第３封止部のうちの少
なくともいずれかの封止部を、折り曲げることにより、
当該封止部の外装体本体部からの突出長さが短くなる。
このため、当該封止部の幅を長くしておいても、折り曲
げることにより体積エネルギー密度の低下を防止でき
る。よって、当該封止部の幅を短くすることに起因した
外部の水分等の侵入による電池特性の劣化を防止するこ
とができ、しかも当該封止部の幅を長くすることに起因
した体積エネルギー密度の低下を防止することができ
る。加えて、折り曲げ部分が外装体本体部の厚み範囲内
に規制されているので、電池の厚みを増加させることも
ない。従って、かかる観点からも、電池厚みが薄いとい
う薄型電池の特徴を維持することができると共に、電池
厚みが厚くなることに伴う体積エネルギー密度の減少も
防止できる。As described above, by bending at least one of the first to third sealing portions,
The projecting length of the sealing portion from the exterior body main portion is reduced.
For this reason, even if the width of the sealing portion is made long, it is possible to prevent a decrease in volume energy density by bending. Therefore, it is possible to prevent battery characteristics from deteriorating due to intrusion of external moisture or the like caused by shortening the width of the sealing portion, and to further reduce volume energy density caused by increasing the width of the sealing portion. Can be prevented from decreasing. In addition, since the bent portion is restricted within the thickness range of the outer package body, the thickness of the battery is not increased. Therefore, from such a viewpoint, it is possible to maintain the characteristics of the thin battery, that is, the thin battery, and to prevent a decrease in volume energy density due to the thick battery.
【００１１】尚、封止部の構造は、ラミネート材の内側
面同士を密着させる場合、ラミネート材の内側面と外側
面を重ねて密着させる場合、ラミネート材の外側面同士
を密着させる場合、その他、ラミネート材の一方の端部
を予め内側に折り曲げて内側面同士を密着させておき、
且つ他方の端部も同様に内側に折り曲げて内側面同士を
密着させておき、当該両端部の外側面同士を密着させる
場合など、種々の構造が考えられる。本請求項１記載の
発明における封止部は、上記種々の封止部構造のうち、
外装体本体部から突出形成されている全ての種類を含む
概念である。[0011] The structure of the sealing portion may be such that the inner surfaces of the laminate are brought into close contact with each other, the inner surface and the outer surface of the laminate are brought into close contact with each other, the outer surfaces of the laminate are brought into close contact, , One end of the laminated material is bent inward in advance to make the inner surfaces adhere to each other,
In addition, various structures are conceivable, such as a case where the other end is similarly bent inward so that the inner surfaces are in close contact with each other, and the outer surfaces of both ends are in close contact with each other. The sealing portion according to the first aspect of the present invention is one of the various sealing portion structures described above.
This is a concept that includes all types protruding from the exterior body main body.
【００１２】また、本発明のうちで請求項２記載の発明
は、請求項１記載の薄型電池において、前記第１封止部
及び前記第２封止部は、それぞれラミネート材の内側面
同士が密着するようにラミネート材の端部近傍を重ね合
わせ、この重ね合わせ部を溶着して形成されたものであ
り、前記第３封止部はラミネート材の内側面と外側面と
が密着するようにラミネート材の端部近傍を重ね合わ
せ、この重ね合わせ部を溶着して形成されたものであ
り、これらの第１及び第２封止部のうちの少なくとも一
方の封止部が、折り曲げられ、且つ折り曲げ部分が外装
体本体部の厚み範囲内に規制されていることを特徴とす
る。According to a second aspect of the present invention, in the thin battery according to the first aspect, the first sealing portion and the second sealing portion each have an inner side surface of a laminate material. The laminate is formed by overlapping the vicinity of the end of the laminated material so as to be in close contact with each other, and welding the overlapped portion. The third sealing portion is formed so that the inner surface and the outer surface of the laminated material are in close contact with each other. It is formed by overlapping the vicinity of the end of the laminate material and welding the overlapped portion, and at least one of the first and second sealing portions is bent, and It is characterized in that the bent portion is restricted within the thickness range of the outer package body.
【００１３】上記の如く、第１封止部及び第２封止部
は、それぞれラミネート材の内側面同士が密着して形成
されたものであり、第３封止部はラミネート材の内側面
と外側面とが密着して形成されたものであり、従って、
第１封止部及び第２封止部のみが外装体本体部から突出
した形状である。よって、第１封止部及び第２封止部の
うちの少なくともいずれか一方の封止部を、折り曲げ、
且つ折り曲げ部分が外装体本体部の厚み範囲内に規制す
ることにより、上記請求項１記載の発明において説明し
たのと同様の作用・効果を奏することになる。As described above, the first sealing portion and the second sealing portion are formed such that the inner surfaces of the laminated material are in close contact with each other, and the third sealing portion is formed with the inner surface of the laminated material. It is formed in close contact with the outer surface,
Only the first sealing portion and the second sealing portion have a shape protruding from the exterior body main portion. Therefore, at least one of the first sealing portion and the second sealing portion is bent,
In addition, by regulating the bent portion to be within the thickness range of the exterior body main portion, the same operation and effect as described in the first aspect of the invention can be obtained.
【００１４】また、本発明のうちで請求項３記載の発明
は、請求項１記載の薄型電池において、前記第１封止
部、前記第２封止部及び前記第３封止部は、それぞれラ
ミネート材の内側面同士が密着するようにラミネート材
の端部近傍を重ね合わせ、この重ね合わせ部を溶着して
形成されたものであることを特徴とする。According to a third aspect of the present invention, in the thin battery according to the first aspect, the first sealing portion, the second sealing portion, and the third sealing portion each include: It is characterized in that the laminate is formed by overlapping the vicinity of the end of the laminate so that the inner surfaces of the laminate are in close contact with each other, and welding the overlapped portion.
【００１５】上記の如く、第１封止部〜第３封止部は、
それぞれラミネート材の内側面同士が密着して形成され
たものであり、従って、第１封止部〜第３封止部のいず
れもが、外装体本体部から突出した形状である。よっ
て、第１〜第３封止部のうちの少なくともいずれかの封
止部を、折り曲げ、且つ折り曲げ部分が外装体本体部の
厚み範囲内に規制することにより、上記請求項１記載の
発明において説明したのと同様の作用・効果を奏するこ
とになる。As described above, the first to third sealing portions are:
The inner surfaces of the laminates are formed in close contact with each other, and therefore, each of the first to third sealing portions has a shape protruding from the exterior body main portion. Therefore, at least any one of the first to third sealing portions is bent, and the bent portion is restricted within the thickness range of the exterior body main portion. The same operation and effect as described will be achieved.
【００１６】また、本発明のうちで請求項４記載の発明
は、請求項１記載の薄型電池において、前記第１封止部
及び前記第２封止部は、それぞれラミネート材の内側面
同士が密着するようにラミネート材の端部近傍を重ね合
わせ、この重ね合わせ部を溶着して形成されたものであ
り、前記第３封止部はラミネート材の外側面同士が密着
するようにラミネート材の端部近傍を重ね合わせ、この
重ね合わせ部を溶着して形成されたものであり、これら
の第１封止部及び第２封止部のうちの少なくとも一方の
封止部が、折り曲げられ、且つ折り曲げ部分が外装体本
体部の厚み範囲内に規制されていることを特徴とする。According to a fourth aspect of the present invention, in the thin battery according to the first aspect, the first sealing portion and the second sealing portion each have an inner surface of a laminate material. The laminate is formed by overlapping the vicinity of the end of the laminate so as to be in close contact with each other, and welding the overlapped portion. The third sealing portion is formed of the laminate so that the outer surfaces of the laminate are in close contact with each other. It is formed by overlapping the vicinity of the end and welding the overlapped portion, and at least one of the first sealing portion and the second sealing portion is bent, and It is characterized in that the bent portion is restricted within the thickness range of the outer package body.
【００１７】上記の如く、第１封止部及び第２封止部
は、それぞれラミネート材の内側面同士が密着して形成
されたものであり、第３封止部はラミネート材の外側面
同士が密着して形成されたものであり、従って、第１封
止部及び第２封止部のみが外装体本体部から突出した形
状である。よって、第１封止部及び第２封止部のうちの
少なくともいずれか一方の封止部を、折り曲げ、且つ折
り曲げ部分が外装体本体部の厚み範囲内に規制すること
により、上記請求項１記載の発明において説明したのと
同様の作用・効果を奏することになる。As described above, the first sealing portion and the second sealing portion are formed such that the inner surfaces of the laminated material are in close contact with each other, and the third sealing portion is formed of the outer surfaces of the laminated material. Are formed in close contact with each other, and therefore, only the first sealing portion and the second sealing portion have a shape protruding from the exterior body main portion. Therefore, by bending at least one of the first sealing portion and the second sealing portion and restricting the bent portion to be within the thickness range of the exterior body main portion, the first aspect is described. The same operations and effects as described in the invention described above will be obtained.
【００１８】また、本発明のうちで請求項５記載の発明
は、請求項１乃至請求項４のいずれかに記載の薄型電池
において、前記折り曲げ部分が、外装体本体部に密着し
ていることを特徴とする。According to a fifth aspect of the present invention, in the thin battery according to any one of the first to fourth aspects, the bent portion is in close contact with the exterior body. It is characterized by.
【００１９】上記の如く、折り曲げ部分が、外装体本体
部に密着することにより、当該折り曲げ部分の外装体本
体部からの突出長さを可及的に小さくすることができ
る。このため、より一層の体積エネルギー密度の向上を
図ることができる。As described above, when the bent portion is in close contact with the exterior body main portion, the length of the bent portion protruding from the exterior body main portion can be made as small as possible. For this reason, the volume energy density can be further improved.
【００２０】[0020]
【発明の実施の形態】〔第１の形態〕本発明の第１の形
態を、図１〜図１２に基づいて、以下に説明する。尚、
図３及び図５において、図解の容易を図るため、渦巻き
電極体の断面構造は簡略化して描いている。本発明の薄
型電池は、図１及び図２に示すように、シート状のラミ
ネート材で構成されるラミネート外装体１を有する。こ
のラミネート外装体１は、発電要素としての渦巻き電極
体２（図７を参照）を収納した外装体本体部３と、外装
体本体部の頂部を封止する第１封止部４ａと、外装体本
体部の底部を封止する第２封止部４ｂと、外装体本体部
の側端部を封止する第３封止部４ｃとを有する。前記第
１封止部４ａでは、前記渦巻き電極体２を構成する正負
極板にそれぞれ付設された集電タブ５ａ，５ｂが、電池
外に導出している状態で封止されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. still,
3 and 5, the cross-sectional structure of the spiral electrode body is simplified for ease of illustration. As shown in FIGS. 1 and 2, the thin battery of the present invention has a laminated outer package 1 made of a sheet-like laminated material. The laminated exterior body 1 includes an exterior body main body 3 containing a spiral electrode body 2 (see FIG. 7) as a power generation element, a first sealing portion 4a for sealing a top portion of the exterior body main body, and an exterior. It has a second sealing portion 4b for sealing the bottom of the body main portion, and a third sealing portion 4c for sealing the side end of the exterior body portion. In the first sealing portion 4a, current collecting tabs 5a and 5b respectively attached to positive and negative electrode plates constituting the spiral electrode body 2 are sealed in a state of being led out of the battery.
【００２１】前記渦巻き電極体２は、図７及び図８に明
らかに示すように、正極板６と負極板７とが電解質層８
を介して渦巻き状に巻回された構造とされている。正極
板６は、帯状の正極集電体の両面に正極活物質が形成さ
れた構成とされ、負極板７は、帯状の負極集電体の両面
に負極活物質が形成された構成とされている。この渦巻
き電極体２は、図３に示すように、外装体本体部３内に
収納されている。また、上記電解質層８は、エチレンカ
ーボネート（ＥＣ）とジエチルカーボネート（ＤＥＣ）
とが体積比で３：７の割合で混合された混合溶媒にＬｉ
ＰＦ6 が１Ｍ（モル／リットル）の割合で溶解されたも
のから成る。As clearly shown in FIGS. 7 and 8, the spiral electrode body 2 comprises a positive electrode plate 6 and a negative electrode plate 7 formed of an electrolyte layer 8.
And a structure wound spirally. The positive electrode plate 6 has a configuration in which a positive electrode active material is formed on both surfaces of a strip-shaped positive electrode current collector, and the negative electrode plate 7 has a configuration in which a negative electrode active material is formed on both surfaces of a strip-shaped negative electrode current collector. I have. The spiral electrode body 2 is housed in an exterior body 3 as shown in FIG. The electrolyte layer 8 is made of ethylene carbonate (EC) and diethyl carbonate (DEC).
Is mixed in a mixed solvent of 3: 7 in volume ratio with Li
Consist of the PF 6 was dissolved at a ratio of 1M (mol / l).
【００２２】ここで、図４に示すように、ラミネート外
装体１を構成するラミネート材１８（厚み：１００μ
ｍ）の具体的な構造は、アルミニウム層１５（厚み：３
０μｍ）の一方の面に、ウレタン系接着剤から成る接着
剤層（厚み：５μｍであり、図示せず）を介してポリプ
ロピレンから成る樹脂層１６（厚み：３０μｍ）が接着
されており、またアルミニウム層１５の他方の面に、変
性ポリプロピレンから成る接着剤層（厚み：５μｍであ
り、図示せず）を介してポリプロピレンから成る樹脂層
１７（厚み：３０μｍ）が接着された構造である。Here, as shown in FIG. 4, a laminate 18 (thickness: 100 μm) constituting the laminate exterior body 1 is formed.
m) has a specific structure of the aluminum layer 15 (thickness: 3).
0 μm), a resin layer 16 (thickness: 30 μm) made of polypropylene is bonded via an adhesive layer (thickness: 5 μm, not shown) made of a urethane-based adhesive, and aluminum The resin layer 17 (thickness: 30 μm) made of polypropylene is bonded to the other surface of the layer 15 via an adhesive layer (thickness: 5 μm, not shown) made of modified polypropylene.
【００２３】また、前記第１封止部４ａ及び第２封止部
４ｂは、図３に示すように、それぞれラミネート材１８
の内側面１８ａ同士が密着するようにラミネート材１８
の端部近傍を重ね合わせ、この重ね合わせ部を溶着して
形成されたものである。また、前記第３封止部４ｃは、
図５及び図６に明らかに示すように、ラミネート材１８
の内側面１８ａと外側面１８ｂとが密着するようにラミ
ネート材１８の端部近傍を重ね合わせ、この重ね合わせ
部を溶着して形成されたものである。これらの第１封止
部４ａ及び第２封止部４ｂは、図２及び図３に明らかに
示すように、折り曲げられており、且つこの折り曲げ部
分は外装体本体部３の端面に密着している。更に、折り
曲げ部分は、外装体本体部３の厚みＬ３の範囲内に規制
されている。このように、第１封止部４ａを折り曲げる
ことにより、封止部の外装体本体部３からの突出長さを
短くすることができる。このため、封止部を折り曲げな
い場合に比べて、電池の縦長が短くなり、これに応じて
電池の体積が減少するので、体積エネルギー密度を大き
くすることができる。As shown in FIG. 3, the first sealing portion 4a and the second sealing portion 4b
Material 18 so that the inner surfaces 18a of the
Are formed by superimposing the vicinity of the end portions and welding the superposed portion. Further, the third sealing portion 4c is
As clearly shown in FIGS. 5 and 6, the laminate 18
The laminate 18 is formed by overlapping the vicinity of the end of the laminate 18 so that the inner surface 18a and the outer surface 18b are in close contact with each other, and welding the overlapped portion. The first sealing portion 4a and the second sealing portion 4b are bent as clearly shown in FIGS. 2 and 3, and the bent portion is in close contact with the end surface of the exterior body main portion 3. I have. Further, the bent portion is restricted within the range of the thickness L3 of the exterior body 3. In this manner, by bending the first sealing portion 4a, the length of the projection of the sealing portion from the exterior body main portion 3 can be reduced. For this reason, the vertical length of the battery is shorter than when the sealing portion is not bent, and the volume of the battery is correspondingly reduced, so that the volume energy density can be increased.
【００２４】また、このように封止部を折り曲げる構成
により、封止部の幅を長くしておいても、これに起因し
て体積エネルギー密度の低下を招くことはない。よっ
て、封止部の幅が短いことに起因して水分や酸素が電池
内部に侵入して電池特性を劣化させるという事態を防止
することができる。Further, with the structure in which the sealing portion is bent as described above, even if the width of the sealing portion is increased, the reduction of the volume energy density does not occur. Therefore, it is possible to prevent a situation in which moisture or oxygen enters the inside of the battery and deteriorates battery characteristics due to the short width of the sealing portion.
【００２５】また、折り曲げ部分が外装体本体部３の厚
みＬ３の範囲内に規制されているので、薄型電池の本来
の特徴である電池厚みが薄いという意義を失うこともな
く、また、電池厚みの増加に応じた体積エネルギー密度
の増加を招くこともない。Further, since the bent portion is restricted within the range of the thickness L3 of the exterior body 3, the thin battery does not lose its original feature that the battery thickness is thin, and the battery thickness is not reduced. Does not cause an increase in volume energy density in accordance with the increase in
【００２６】尚，参考までに述べると、外装体本体部３
の厚みＬ３の範囲内から、部分的に折り曲げ部分がはみ
出すように折り曲げた場合には、封止部の突出長さに起
因した体積エネルギー密度の低下を防止することができ
ても、その一方で電池の厚みが大きくなる分だけ、体積
エネルギー密度が減少する。加えて、電池の厚みが大き
くなると、薄型電池の本来的な意義も失われることにな
る。よって、本実施の形態のように、封止部を折り曲
げ、且つ折れ曲げ部分が、外装体本体部３の厚みＬ３の
範囲内に規制される構成とすることにより、体積エネル
ギー密度の向上に加えて、電池の厚みを可及的に薄くし
た薄型電池を実現できる。尚、この電池の大きさは、縦
Ｌ１が６５ｍｍ（図１参照）、横Ｌ２が３５ｍｍ（図１
参照）、厚みＬ３が３．３ｍｍ（図３参照）となるよう
に構成されている。尚、後述するように第１封止部４ａ
の幅Ｍ１（図１２参照）及び第２封止部４ｂの幅Ｍ２
（図１２参照）は、共に５ｍｍとなるように構成されて
いる。Incidentally, for reference, the outer body 3
In the case where the bent portion is bent so as to partially protrude from the range of the thickness L3, even if the reduction of the volume energy density due to the protruding length of the sealing portion can be prevented, on the other hand, As the thickness of the battery increases, the volume energy density decreases. In addition, as the thickness of the battery increases, the original significance of the thin battery is lost. Therefore, as in the present embodiment, the sealing portion is bent, and the bent portion is regulated to be within the range of the thickness L3 of the exterior body main portion 3, thereby improving the volume energy density. As a result, a thin battery in which the thickness of the battery is made as thin as possible can be realized. The size of this battery is 65 mm in length L1 (see FIG. 1) and 35 mm in width L2 (see FIG. 1).
And a thickness L3 of 3.3 mm (see FIG. 3). In addition, as described later, the first sealing portion 4a
M1 (see FIG. 12) and the width M2 of the second sealing portion 4b
(See FIG. 12) are both configured to be 5 mm.
【００２７】ここで、上記構造の電池を、以下のように
して作製した。先ず、樹脂層（ポリプロピレン）／接着
剤層／アルミニウム合金層／接着剤層／樹脂層（ポリプ
ロピレン）の５層構造から成るシート状のラミネート材
１８を用意した後、図９に示すように、このラミネート
材１８における端部近傍の内側面１８ａ同士を重ね合わ
せ、更に、重ね合わせ部１９を溶着して、封止部４ｃを
形成する。この際、収納空間２０を十分に確保してラミ
ネート材１８を筒状とすべく、内部に台座を配置した状
態で溶着を行う。尚、筒状とされたラミネート材１８の
寸法は、幅が３５ｍｍ、長さが７５ｍｍである。Here, a battery having the above structure was manufactured as follows. First, after preparing a sheet-like laminate 18 having a five-layer structure of a resin layer (polypropylene) / adhesive layer / aluminum alloy layer / adhesive layer / resin layer (polypropylene), as shown in FIG. The inner surfaces 18a near the ends of the laminate 18 are overlapped with each other, and the overlapped portion 19 is welded to form the sealing portion 4c. At this time, welding is performed in a state where a pedestal is disposed inside in order to sufficiently secure the storage space 20 and make the laminated material 18 cylindrical. The dimensions of the cylindrical laminated material 18 are 35 mm in width and 75 mm in length.
【００２８】次に、図１０に示すように、筒状のラミネ
ート材１８の収納空間２０内に渦巻き電極体２を挿入す
る。尚、渦巻き電極体２は、集電タブ５ａ，５ｂが予め
付設されており、正極板６と負極板７とを電解質層８を
介して渦巻き状に巻き取り、この巻き取られた渦巻き電
極体２を加圧力１０Ｋｇ／ｃｍ2 で加圧して、楕円形状
とした。次いで、筒状のラミネート材１８の一方の開口
部から集電タブ５ａ，５ｂが突出するように渦巻き電極
体２を配置した。次に、図１１に示すように、この状態
で、両集電タブ５ａ，５ｂが突出している開口部のラミ
ネート材１８を溶着して封止し、第１封止部４ａ（幅：
５ｍｍ）を形成した。この際、溶着は高周波誘導溶着装
置を用いて行った。Next, as shown in FIG. 10, the spiral electrode body 2 is inserted into the storage space 20 of the cylindrical laminate 18. The spiral electrode body 2 is provided with current collecting tabs 5a and 5b in advance, and spirally winds the positive electrode plate 6 and the negative electrode plate 7 with the electrolyte layer 8 interposed therebetween. 2 was pressed at a pressure of 10 kg / cm 2 to form an elliptical shape. Next, the spiral electrode body 2 was arranged so that the current collecting tabs 5a and 5b protruded from one opening of the cylindrical laminated material 18. Next, as shown in FIG. 11, in this state, the lamination material 18 in the opening from which the current collecting tabs 5a and 5b protrude is welded and sealed, and the first sealing portion 4a (width:
5 mm). At this time, welding was performed using a high frequency induction welding apparatus.
【００２９】次いで、この状態で、真空加熱乾燥（温
度：１０５℃）を２時間行い、ラミネート材１８及び渦
巻き電極体２の水分を除去した。この後、エチレンカー
ボネートとジエチルカーボネートとが体積比で３：７の
割合で混合された混合溶媒に、溶質であるＬｉＰＦ6 が
１Ｍ（モル／リットル）の割合で溶解された電解液を注
入した後、この状態で１時間放置した。しかる後、渦巻
き電極体２に対応するラミネート材１８を金属板にて加
圧しつつ、上記封止部４ａとは反対側のラミネート材１
１の端部を超音波溶着装置を用いて溶着し、第２封止部
４ｂ（幅：５ｍｍ）を形成した（図１２）。次いで、第
１封止部４ａ及び第２封止部４ｂを１回折り曲げ、この
折り曲げ部分を外装体本体端面に密着させることにより
薄型電池（長さ：６４ｍｍ、幅：３５ｍｍ、厚み：３．
３ｍｍ、放電容量５００ｍＡｈ）を作製した。尚、上記
電解液注入工程以降の工程は、アルゴン雰囲気のドライ
ボックス内で行った。Next, in this state, vacuum heating and drying (temperature: 105 ° C.) was performed for 2 hours to remove moisture from the laminate 18 and the spirally wound electrode body 2. Thereafter, an electrolyte in which LiPF 6 as a solute was dissolved at a ratio of 1 M (mol / liter) was injected into a mixed solvent in which ethylene carbonate and diethyl carbonate were mixed at a volume ratio of 3: 7. This was left for 1 hour. Thereafter, while pressing the lamination material 18 corresponding to the spiral electrode body 2 with a metal plate, the lamination material 1 on the side opposite to the sealing portion 4a is pressed.
1 was welded using an ultrasonic welding apparatus to form a second sealing portion 4b (width: 5 mm) (FIG. 12). Next, the first sealing portion 4a and the second sealing portion 4b are bent once, and the bent portion is brought into close contact with the end surface of the exterior body main body to form a thin battery (length: 64 mm, width: 35 mm, thickness: 3.
3 mm, and a discharge capacity of 500 mAh). The steps after the electrolyte injection step were performed in a dry box in an argon atmosphere.
【００３０】ここで、ラミネート外装体の樹脂層として
は上記ポリプロピレンに限定されるものではなく、例え
ば、ポリエチレン等のポリオレフィン系高分子、ポリエ
チレンテレフタレート等のポリエステル系高分子、ポリ
フッ化ビニリデン、ポリ塩化ビニリデン等のポリビニリ
デン系高分子、ナイロン６、ナイロン６６、ナイロン７
等のポリアミド系高分子等が挙げられる。Here, the resin layer of the laminate exterior body is not limited to the above-mentioned polypropylene, but may be, for example, a polyolefin polymer such as polyethylene, a polyester polymer such as polyethylene terephthalate, polyvinylidene fluoride, polyvinylidene chloride. Such as polyvinylidene polymer, nylon 6, nylon 66, nylon 7
And the like.
【００３１】また、樹脂層の厚さは、１μｍ以上５００
μｍ以下、好ましくは５μｍ以上１００μｍ以下である
ことが望ましく、金属層の厚さは、０．１μｍ以上２０
０μｍ以下、好ましくは１μｍ以上５０μｍ以下である
ことが望ましい。これは、金属層や樹脂層の厚みが余り
に小さくなると、酸素透過性が高くなるため電池特性が
低下する等の問題が生じる一方、樹脂層の厚みが余りに
大きくなると加工性が低下する等の問題が生じ、金属層
の厚みが余りに大きくなると電池が重くなったり電池の
柔軟性に欠ける等の問題が生じるからである。これらの
ことから、樹脂／金属積層体全体の厚みは、２μｍ以上
１ｍｍ以下、好ましくは１０μｍ以上２００μｍ以下で
あるのが望ましい。The thickness of the resin layer is not less than 1 μm and not more than 500 μm.
μm or less, preferably 5 μm or more and 100 μm or less, and the thickness of the metal layer is 0.1 μm or more and 20 μm or less.
It is desirably 0 μm or less, preferably 1 μm or more and 50 μm or less. This is because if the thickness of the metal layer or the resin layer is too small, the oxygen permeability becomes high, causing a problem such as a decrease in battery characteristics. On the other hand, if the thickness of the resin layer is too large, the workability is reduced. This is because if the thickness of the metal layer is too large, the battery becomes heavy and the battery lacks flexibility. From these facts, it is desirable that the thickness of the entire resin / metal laminate is 2 μm or more and 1 mm or less, preferably 10 μm or more and 200 μm or less.
【００３２】更に、正極材料としては上記ＬｉＣｏＯ2
に限定するものではなく、例えば、ＬｉＮｉＯ2 、Ｌｉ
Ｍｎ2 Ｏ4 、或いはこれらの複合体等であっても良く、
また本発明は上記リチウムイオン電池に限定されるもの
ではなく、正負極間に固体電解質が存在するポリマー電
池等の他の電池にも適用しうる。加えて、上記形態では
ラミネート材１８を筒状とする際に台座を用いたが、こ
のような方法に限定するものではなく、台座の代わり
に、直接渦巻き電極体２を用いてラミネート材１８を筒
状とすることも可能である。Further, as the positive electrode material, the above LiCoO 2
However, for example, LiNiO 2 , Li
Mn 2 O 4 or a composite thereof may be used,
Further, the present invention is not limited to the above-mentioned lithium ion battery, but can be applied to other batteries such as a polymer battery in which a solid electrolyte exists between the positive and negative electrodes. In addition, in the above-described embodiment, the pedestal is used when the laminate 18 is formed into a cylindrical shape. However, the present invention is not limited to such a method. Instead of the pedestal, the laminate 18 is directly formed using the spiral electrode body 2. It is also possible to make it cylindrical.
【００３３】〔第２の形態〕図１３は本発明の第２の形
態の斜視図である。この第２の形態は、第１封止部４ａ
は折り曲ずにそのままの状態とし、第２封止部４ｂのみ
を折り曲げたことの他は、第１の形態と同様である。
尚、図１２において、実施の形態１と対応する部分につ
いては同一の参照符号を付して、説明は省略する。この
ように、第１封止部４ｂのみを折り曲げるように構成し
た場合は、第１封止部４ａ及び第２封止部４ｂを共に折
り曲げる第１の形態に比べると、体積エネルギー密度は
減少するけれども、それでもいずれの封止部をも折り曲
げない従来例に比べれば、体積エネルギー密度は増加す
ることになる。よって、このような第２の形態において
もまた、第１の形態と同様に体積エネルギー密度の向上
及び水分等の侵入に起因した電池性能の劣化防止するこ
とができる。[Second Embodiment] FIG. 13 is a perspective view of a second embodiment of the present invention. This second embodiment is similar to the first sealing portion 4a.
Is the same as in the first embodiment except that the second sealing portion 4b is bent without bending.
In FIG. 12, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the case where only the first sealing portion 4b is bent as described above, the volume energy density is reduced as compared with the first mode in which the first sealing portion 4a and the second sealing portion 4b are both bent. However, the volume energy density is still increased as compared with the conventional example in which none of the sealing portions is bent. Therefore, also in the second embodiment, similarly to the first embodiment, it is possible to improve the volume energy density and prevent the battery performance from deteriorating due to intrusion of moisture or the like.
【００３４】〔第３の形態〕図１４は本発明の第３の形
態の斜視図であり、図１５は図１４のＣ−Ｃ線矢視断面
図である。尚、図１５において、図解の容易を図るた
め、渦巻き電極体２の断面構造は簡略化して描いてい
る。この第３の形態は、第１封止部４ａは折り曲ずにそ
のままの状態とし、第２封止部４ｂのみを折り曲げ、更
に外装体本体部の両側面に、断面がＶ字状の溝部３０を
形成したことの他は、第１の形態と同様である。尚、図
１４及び図１５において、実施の形態１と対応する部分
については同一の参照符号を付して、説明は省略する。
このようにＶ字状の溝部３０を形成することにより、仮
想線で示す外装体本体部の側面３ａが内方側に凹み、電
池の横長さが短くなる。そのため、体積エネルギー密度
の向上を図ることができる。[Third Embodiment] FIG. 14 is a perspective view of a third embodiment of the present invention, and FIG. 15 is a sectional view taken along line CC of FIG. In FIG. 15, the cross-sectional structure of the spiral electrode body 2 is illustrated in a simplified manner for easy illustration. In the third embodiment, the first sealing portion 4a is left unfolded, and only the second sealing portion 4b is bent, and furthermore, V-shaped grooves are formed on both side surfaces of the outer package body. Except that the 30 is formed, it is the same as the first embodiment. In FIGS. 14 and 15, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
By forming the V-shaped groove portion 30 in this manner, the side surface 3a of the exterior body main portion indicated by a virtual line is depressed inward, and the lateral length of the battery is shortened. Therefore, the volume energy density can be improved.
【００３５】〔第４の形態〕第４の形態では、図１６及
び図１７に示すように、第１封止部４ａ、第２封止部４
ｂ及び第３封止部４ｃが、それぞれラミネート材１８の
内側面１８ａ同士が密着するようにラミネート材１８の
端部近傍を重ね合わせ、この重ね合わせ部を溶着して形
成されたものであり、これらすべての第１〜第３封止部
４ａ〜４ｃが、折り曲げられることの他は、第１の形態
と同様である。尚、図１６及び図１７において、実施の
形態１と対応する部分については同一の参照符号を付し
て、説明は省略する。この第４の形態では、第１の形態
と異なり、第３封止部４ｃは、内側面１８ａ同士を重ね
合わせて溶着されたものであることから、溶着された状
態のままでは、図１７の仮想線で示すように、外装体本
体部３から突出している。そのため、このままの状態で
は、電池厚みが大きくなり、体積エネルギー密度が減少
することになる。そこで、第３封止部４ｃについても、
折り曲げることにより、体積エネルギー密度の減少を防
止している。尚、この実施の形態では、第１〜第３封止
部のすべてを折り曲げるようにしたけれども、第１〜第
３封止部のうちの１つの封止部、あるいは、第１〜第３
封止部のうちの２つの封止部のみを折り曲げるようにし
てもよい。[Fourth Embodiment] In a fourth embodiment, as shown in FIGS. 16 and 17, a first sealing portion 4a and a second sealing portion 4a are formed.
b and the third sealing portion 4c are formed by overlapping the vicinity of the end of the laminate 18 so that the inner side surfaces 18a of the laminate 18 are in close contact with each other, and welding the overlapped portion. The first embodiment is the same as the first embodiment except that all of the first to third sealing portions 4a to 4c are bent. In FIGS. 16 and 17, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the fourth embodiment, unlike the first embodiment, the third sealing portion 4c is welded by overlapping the inner side surfaces 18a with each other. As shown by the imaginary line, it protrudes from the exterior body 3. Therefore, in this state, the battery thickness increases, and the volume energy density decreases. Therefore, also regarding the third sealing portion 4c,
The bending prevents a decrease in volume energy density. In this embodiment, all of the first to third sealing portions are bent, but one of the first to third sealing portions or the first to third sealing portions is bent.
Only two of the sealing portions may be bent.
【００３６】〔第５の形態〕第５の形態は、図１８に示
すように、第３封止部４ｃがラミネート材１８の外側面
１８ｂ同士が密着するようにラミネート材１８の端部近
傍を重ね合わせ、この重ね合わせ部を溶着して形成され
たものであることの他は、第１の形態と同様である。
尚、図１８及び図１９において、実施の形態１と対応す
る部分については同一の参照符号を付して、説明は省略
する。この第５の形態では、第３封止部４ｃは外装体本
体部の外方側に突出していないので、第３封止部４ｃの
存在そのものは、体積エネルギー密度に影響を与えな
い。従って、第１の形態と同様に第１封止部４ａ及び第
２封止部４のみが、折り曲げられている。このような構
成であってもまた、本発明の効果を奏することができ
る。尚、第１封止部４ａ及び第２封止部４ｂのいずれか
一方を折り曲げるようにしてもよいことは勿論である。 〔その他の形態〕 上記の形態では、封止部は横に１回折り曲げるように
したけれども、本発明はこれに限定さるものではなく、
縦、横、斜め、何れの方向に折り曲げてもよく、また、
折り曲げ回数についても特に制限はない。要は、封止部
の外装体本体部分からの突出長さを短くする構成であれ
ば充分である。 また、上記の形態では、封止部は外装体本体部端面に
密着するように構成したけれども、封止部を単に折り曲
げるだけで密着させない構成であってもよい。尚、密着
させた場合の方が、封止部の外装体本体部分からの突出
長さを短くできるので、より好ましいが、密着させない
場合であっても、従来例に比べて当該突出長さを短くで
きるので、発明の効果が十分に得られる。 また、上記の形態では、発電要素としては、渦巻き状
電極体を使用したけれども、複数枚の正負極板がセパレ
ータを介して積層されたタイプの電極体を使用するよう
にしてもよい。[Fifth Embodiment] In a fifth embodiment, as shown in FIG. 18, the third sealing portion 4c closes the end portion of the laminate 18 so that the outer surfaces 18b of the laminate 18 adhere to each other. It is the same as the first embodiment except that it is formed by overlapping and welding the overlapped portion.
In FIGS. 18 and 19, parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the fifth embodiment, since the third sealing portion 4c does not protrude to the outside of the exterior body main portion, the existence of the third sealing portion 4c itself does not affect the volume energy density. Therefore, only the first sealing portion 4a and the second sealing portion 4 are bent as in the first embodiment. Even with such a configuration, the effects of the present invention can be achieved. It is needless to say that one of the first sealing portion 4a and the second sealing portion 4b may be bent. [Other Embodiments] In the above-described embodiment, the sealing portion is bent once to the side, but the present invention is not limited to this.
Vertical, horizontal, diagonal, may be bent in any direction,
There is no particular limitation on the number of times of bending. In short, it is sufficient if the configuration is such that the length of protrusion of the sealing portion from the exterior body main body portion is reduced. In the above embodiment, the sealing portion is configured to be in close contact with the end surface of the exterior body main portion, but may be configured to simply bend the sealing portion so as not to be in close contact. In addition, it is more preferable that the protruding length of the sealing portion from the exterior body main body portion is shorter when the contact portions are in close contact with each other. Since the length can be shortened, the effects of the invention can be sufficiently obtained. Further, in the above-described embodiment, although a spiral electrode body is used as the power generation element, an electrode body of a type in which a plurality of positive and negative electrode plates are stacked via a separator may be used.
【００３７】[0037]
【実施例】〔実施例１〕実施例１としては上記第１の形
態に示す構造の電池を用いた。このようにして作製した
電池を、以下、本発明電池Ａ１と称する。尚、第１封止
部の幅及び第２封止部の幅、電池の寸法並びに、放電容
量は以下のとおりである。 電池の縦：６４ｍｍ 電池の横：３５ｍｍ 電池の
厚み：３．３ｍｍ 第１封止部の幅：５ｍｍ 第２封止部の幅：５ｍｍ 放電容量：５００ｍＡｈEXAMPLES Example 1 In Example 1, a battery having the structure shown in the first embodiment was used. The battery fabricated in this manner is hereinafter referred to as Battery A1 of the invention. The width of the first sealing portion and the width of the second sealing portion, the dimensions of the battery, and the discharge capacity are as follows. Battery length: 64 mm Battery width: 35 mm Battery thickness: 3.3 mm Width of first sealing portion: 5 mm Width of second sealing portion: 5 mm Discharge capacity: 500 mAh
【００３８】〔実施例２〕実施例２としては上記第２の
形態に示す構造の電池を用いた。このようにして作製し
た電池を、以下、本発明電池Ａ２と称する。尚、第１封
止部の幅及び第２封止部の幅、電池の寸法並びに、放電
容量は以下のとおりである。 電池の縦：６８ｍｍ 電池の横：３５ｍｍ 電池の
厚み：３．３ｍｍ 第１封止部の幅：５ｍｍ 第２封止部の幅：５ｍｍ 放電容量：５００ｍＡｈExample 2 In Example 2, a battery having the structure shown in the second embodiment was used. The battery fabricated in this manner is hereinafter referred to as Battery A2 of the invention. The width of the first sealing portion and the width of the second sealing portion, the dimensions of the battery, and the discharge capacity are as follows. Battery length: 68 mm Battery width: 35 mm Battery thickness: 3.3 mm Width of first sealing portion: 5 mm Width of second sealing portion: 5 mm Discharge capacity: 500 mAh
【００３９】〔比較例１〕図１９に示すように、第１封
止部及び第２封止部が、いずれも折り曲げられず、外装
体本体部から突出形成されたままの状態であることの他
は、上記実施例１と同様にして電池を作製した。尚、第
１封止部及び第２封止部の幅は、上記実施例１と同じで
ある。第１封止部の幅及び第２封止部の幅、電池の寸法
並びに、放電容量は以下のとおりである。このようにし
て作製した電池を、以下、比較電池Ｘ１と称する。 電池の縦：７２ｍｍ 電池の横：３５ｍｍ 電池の
厚み：３．３ｍｍ 第１封止部の幅：５ｍｍ 第２封止部の幅：５ｍｍ 放電容量：５００ｍＡｈCOMPARATIVE EXAMPLE 1 As shown in FIG. 19, neither the first sealing portion nor the second sealing portion is bent and remains in a state of being protruded from the outer package body. Otherwise, a battery was fabricated in the same manner as in Example 1. The widths of the first sealing portion and the second sealing portion are the same as in the first embodiment. The width of the first sealing portion and the width of the second sealing portion, the dimensions of the battery, and the discharge capacity are as follows. The battery fabricated in this manner is hereinafter referred to as Comparative Battery X1. Battery length: 72 mm Battery width: 35 mm Battery thickness: 3.3 mm Width of first sealing portion: 5 mm Width of second sealing portion: 5 mm Discharge capacity: 500 mAh
【００４０】〔比較例２〕図２０に示すように、第１封
止部及び第２封止部は、いずれも折り曲げず、外装体本
体部から突出したままの状態であることの他は、上記実
施例１と同様にして電池を作製した。但し、各第１封止
部及び第２封止部の幅を、比較例１よりも短くした。ま
た、電池の寸法及び放電容量は以下のとおりである。こ
のようにして作製した電池を、以下、比較電池Ｘ２と称
する。 電池の縦：６６ｍｍ 電池の横：３５ｍｍ 電池の
厚み：３．３ｍｍ 第１封止部の幅：２ｍｍ 第２封止部の幅：２ｍｍ 放電容量：５００ｍＡｈCOMPARATIVE EXAMPLE 2 As shown in FIG. 20, except that neither the first sealing portion nor the second sealing portion is bent and remains protruding from the exterior body main portion. A battery was manufactured in the same manner as in Example 1. However, the width of each of the first sealing portion and the second sealing portion was shorter than that of Comparative Example 1. The dimensions and discharge capacity of the battery are as follows. The battery fabricated in this manner is hereinafter referred to as Comparative Battery X2. Battery length: 66 mm Battery width: 35 mm Battery thickness: 3.3 mm First sealing part width: 2 mm Second sealing part width: 2 mm Discharge capacity: 500 mAh
【００４１】〔比較例３〕図２１に示すように、第１封
止部及び第２封止部を折り曲げ、折り曲げ部分を外装体
本体部の上面に密着させたことの他は、上記実施例１と
同様にして電池を作製した。第１封止部の幅及び第２封
止部の幅、電池の寸法並びに、放電容量は以下のとおり
である。このようにして作製した電池を、以下、比較電
池Ｘ３と称する。 電池の縦：６４ｍｍ 電池の横：３５ｍｍ 電池の
厚み：３．６ｍｍ 第１封止部の幅：５ｍｍ 第２封止部の幅：５ｍｍ 放電容量：５００ｍＡｈCOMPARATIVE EXAMPLE 3 As shown in FIG. 21, the first embodiment is different from the first embodiment in that the first sealing portion and the second sealing portion are bent and the bent portion is brought into close contact with the upper surface of the exterior body. A battery was produced in the same manner as in Example 1. The width of the first sealing portion and the width of the second sealing portion, the dimensions of the battery, and the discharge capacity are as follows. The battery fabricated in this manner is hereinafter referred to as Comparative Battery X3. Battery length: 64 mm Battery width: 35 mm Battery thickness: 3.6 mm Width of first sealing portion: 5 mm Width of second sealing portion: 5 mm Discharge capacity: 500 mAh
【００４２】〔実験１〕上記本発明電池Ａ１〜Ａ２及び
比較電池Ｘ１〜Ｘ３において、６０℃で２０日間電池を
保存した後の電池容量回復率及び体積エネルギー密度を
調べたので、それらの結果を表１に示す。尚、試料数
は、各電池１００個である。[Experiment 1] With respect to the batteries A1 to A2 of the present invention and the comparative batteries X1 to X3, the battery capacity recovery rate and the volume energy density after storing the batteries at 60 ° C. for 20 days were examined. It is shown in Table 1. The number of samples is 100 for each battery.
【００４３】[0043]
【表１】 [Table 1]
【００４４】表１から以下の事項が理解される。 表１から明らかなように、本発明電池Ａ１、Ａ２及び
比較電池Ｘ１、Ｘ３では、全て電池容量回復率が９０％
であるのに対して、比較電池Ｘ２では容量回復率が８０
％となっていることが認められる。これは、本発明電池
Ａ１、Ａ２及び比較電池Ｘ１、Ｘ３共に、第１封止部４
ａ及び第２封止部４ｂの幅（それぞれ５ｍｍ）が、比較
電池Ｘ２の第１封止部及び第２封止部の幅（それぞれ２
ｍｍ）よりも長いので、その長い分だけ本発明電池Ａ
１、Ａ２及び比較電池Ｘ１、Ｘ３の方が、水分等が封止
部端面から電池内部に侵入し難くなり、そのため、保存
時の電池容量の劣化を抑えることができると考えられる
からである。The following items are understood from Table 1. As is clear from Table 1, all of the batteries A1 and A2 of the present invention and the comparative batteries X1 and X3 have a battery capacity recovery rate of 90%.
On the other hand, the capacity recovery rate of the comparative battery X2 is 80
%. This is because the batteries A1 and A2 of the present invention and the comparative batteries X1 and X3 both have the first sealing portion 4.
a and the width of the second sealing portion 4b (each 5 mm) is equal to the width of the first sealing portion and the second sealing portion of the comparative battery X2 (each 2 mm).
mm), the battery A of the present invention has a length corresponding to the length.
This is because it is considered that water and the like do not easily enter the inside of the battery from the end face of the sealing portion, and thus the deterioration of the battery capacity during storage can be suppressed in the batteries A1, A2 and the comparative batteries X1 and X3.
【００４５】また、表１から明らかなように、本発明
電池Ａ１、Ａ２の何れもが、比較電池Ｘ１に比べて、体
積エネルギー密度の増加が認められる。これは、比較電
池Ｘ１では、第１封止部４ａ及び第２封止部４ｂが共に
折り曲げられずに、外装体本体部から突出形成したまま
の状態であることから、電池の縦長さに関して、本発明
電池Ａ１、Ａ２の方が、比較電池Ｘ１に比べて小さくな
り、そのため、電池の全体積に関して、本発明電池Ａ
１、Ａ２の方が、比較電池Ｘ１に比べて小さくなるから
である。As is clear from Table 1, both the batteries A1 and A2 of the present invention show an increase in volume energy density as compared with the comparative battery X1. This is because, in the comparative battery X1, the first sealing portion 4a and the second sealing portion 4b are not bent together but remain to protrude from the exterior body main portion, so that the vertical length of the battery is The batteries A1 and A2 of the present invention are smaller than the comparative battery X1.
This is because A1 and A2 are smaller than the comparative battery X1.
【００４６】一方、体積エネルギー密度に関して、比
較電池Ｘ２は、本発明電池Ａ１よりも小さく、本発明電
池Ａ２よりも大きいことが認められる。これは、比較電
池Ｘ２では、第１及び第２封止部を折り曲げず、突出形
成したままの状態であるけれども、封止部の幅（２ｍ
ｍ）が短い。従って、電池の縦長さが、比較電池Ｘ２
（電池の縦長さ：６６ｍｍ）では、本発明電池Ａ１（電
池の縦長さ：６４ｍｍ）よりも大きく、本発明電池Ａ２
（電池の縦長さ：６８ｍｍ）よりも小さく、これに応じ
て、電池体積が、本発明電池Ａ１、比較電池Ｘ２、本発
明電池Ａ２の順に大きくなるからである。よって、体積
エネルギー密度の観点からすれば、比較電池Ｘ２の方
が、本発明電池Ａ２よりも優れているとも考えられる。
しかしながら、上記の如く、容量回復率に関しては、比
較電池Ｘ２は本発明電池Ａ２よりも劣っている。よっ
て、比較電池Ｘ２のように、封止部の幅（２ｍｍ）を短
くしただけでは、２つの要請（封止部からの水分等の侵
入に起因した電池性能の劣化防止の要請と、体積エネル
ギー密度の向上を図る要請）のうちの一方のみしか満た
さず、２つの要請を同時に満たすことができないことが
理解される。On the other hand, with respect to the volume energy density, the comparative battery X2 is smaller than the battery A1 of the present invention and larger than the battery A2 of the present invention. This is because, in the comparative battery X2, although the first and second sealing portions are not bent and remain in a protruding state, the width of the sealing portion (2 m
m) is short. Therefore, the vertical length of the battery is equal to that of the comparative battery X2.
(Battery length: 66 mm) is larger than the battery A1 of the invention (battery length: 64 mm), and the battery A2 of the invention
(Vertical length of the battery: 68 mm), and accordingly, the battery volume increases in the order of battery A1 of the present invention, comparative battery X2, and battery A2 of the present invention. Therefore, from the viewpoint of the volume energy density, it is considered that the comparative battery X2 is superior to the battery A2 of the present invention.
However, as described above, the comparative battery X2 is inferior to the battery A2 of the present invention in the capacity recovery rate. Therefore, just by reducing the width (2 mm) of the sealing portion as in the comparative battery X2, there are two requirements (a requirement to prevent deterioration of battery performance due to intrusion of moisture and the like from the sealing portion, and a requirement for volumetric energy). It is understood that only one of the two requirements can be satisfied and the two requirements cannot be satisfied simultaneously.
【００４７】一方、比較電池Ｘ３は、容量回復率に関
しては、比較電池Ｘ１と同じであっても、体積エネルギ
ー密度が増加している。更に、比較電池Ｘ３は、容量回
復率に関して、比較電池Ｘ２を除く他の本発明電池Ａ
１、Ａ２及び比較電池Ｘ１と同じである。よって、比較
電池Ｘ３のように、封止部を折り曲げ、且つ折り曲げ部
分を外装体本体部の上面に密着させる構成であれば、上
記の２つの要請を満たすことができる薄型電池を実現で
きるとも考えられる。しかしながら、比較電池Ｘ３で
は、表１に示すように、本発明電池Ａ１，Ａ２に対し
て、電池厚みが大きく、また、体積エネルギー密度も小
さい。よって、比較電池Ｘ３では、薄型電池の特徴であ
る薄さを失うことになり、また、体積エネルギー密度の
向上の観点からすると、本発明電池Ａ１，Ａ２よりも劣
ることになる。On the other hand, the comparative battery X3 has an increased volume energy density even though the capacity recovery rate is the same as that of the comparative battery X1. Furthermore, the comparative battery X3 is the same as the battery A of the present invention except for the comparative battery X2 with respect to the capacity recovery rate.
1, A2 and the comparative battery X1. Therefore, it is considered that a thin battery that can satisfy the above two requirements can be realized if the configuration is such that the sealing portion is bent and the bent portion is brought into close contact with the upper surface of the exterior body main portion as in the comparative battery X3. Can be However, as shown in Table 1, the comparative battery X3 has a larger battery thickness and a smaller volume energy density than the batteries A1 and A2 of the present invention. Therefore, the comparative battery X3 loses the thinness characteristic of the thin battery, and is inferior to the batteries A1 and A2 of the present invention from the viewpoint of improving the volume energy density.
【００４８】よって、封止部を折り曲げ、且つこの折
り曲げ部分を外装体本体部の厚み範囲内に規制する本発
明電池Ａ１，Ａ２によれば、２つの要請（封止部からの
水分等の侵入に起因した電池性能の劣化防止の要請と、
体積エネルギー密度の向上を図る要請）を同時に満たす
ことができることが理解される。Therefore, according to the batteries A1 and A2 of the present invention in which the sealing portion is bent and the bent portion is restricted within the thickness range of the exterior body main portion, there are two requirements (intrusion of moisture and the like from the sealing portion). Request to prevent deterioration of battery performance due to
It is understood that the requirement to improve the volume energy density can be satisfied at the same time.
【００４９】[0049]
【発明の効果】以上説明したように、本発明によれば、
外装体本体部の頂部を封止する第１封止部と、外装体本
体部の底部を封止する第２封止部とのうちの少なくとも
一方の封止部が、折り曲げられ、且つ折り曲げ部分が外
装体本体部の厚み範囲内に規制されているので、以下の
効果を奏する。 当該封止部の外装体本体部からの突出長さが短くな
る。このため、当該封止部の幅を長くしておいても、折
り曲げることにより体積エネルギー密度の低下を防止で
きる。従って、当該封止部の幅を短くすることに起因し
た外部の水分等の侵入による電池特性の劣化を防止する
ことができると共に、当該封止部の幅を長くすることに
起因した体積エネルギー密度による低下を防止すること
ができる。 また、折り曲げ部分が外装体本体部の厚み範囲内に規
制されているので、電池の厚みを増加させることもな
く、薄型電池の特徴である薄さを失うことがない。As described above, according to the present invention,
At least one of the first sealing portion that seals the top portion of the exterior body main portion and the second sealing portion that seals the bottom portion of the exterior body main portion is bent and bent. Is regulated within the range of the thickness of the exterior body, so that the following effects can be obtained. The projecting length of the sealing portion from the exterior body main portion is reduced. For this reason, even if the width of the sealing portion is made long, it is possible to prevent a decrease in volume energy density by bending. Therefore, it is possible to prevent the battery characteristics from deteriorating due to intrusion of external moisture and the like caused by shortening the width of the sealing portion, and to reduce the volume energy density caused by increasing the width of the sealing portion. Can be prevented. Further, since the bent portion is restricted within the thickness range of the exterior body, the thickness of the battery is not increased, and the thinness characteristic of the thin battery is not lost.
【図１】本発明の第１の形態に係る薄型電池の正面図で
ある。FIG. 1 is a front view of a thin battery according to a first embodiment of the present invention.
【図２】本発明の第１の形態に係る薄型電池の斜視図で
ある。FIG. 2 is a perspective view of the thin battery according to the first embodiment of the present invention.
【図３】図１のＡ−Ａ線矢視断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 1;
【図４】図３の一部拡大図である。FIG. 4 is a partially enlarged view of FIG. 3;
【図５】図１のＢ−Ｂ線矢視断面図である。FIG. 5 is a sectional view taken along line BB of FIG. 1;
【図６】図５の一部拡大図である。FIG. 6 is a partially enlarged view of FIG. 5;
【図７】渦巻き電極体２の斜視図である。FIG. 7 is a perspective view of a spiral electrode body 2.
【図８】渦巻き電極体２の断面図である。FIG. 8 is a cross-sectional view of a spiral electrode body 2.
【図９】筒状ラミネート材１８（ラミネート外装体）の
斜視図である。FIG. 9 is a perspective view of a cylindrical laminated material 18 (laminated exterior body).
【図１０】筒状ラミネート材１８（ラミネート外装体）
に渦巻き電極体２を挿入する状態を示す図である。FIG. 10 is a cylindrical laminated material 18 (laminated exterior body).
FIG. 6 is a view showing a state in which a spiral electrode body 2 is inserted into the spiral.
【図１１】ラミネート外装体の頂部の封止状態を示す図
である。FIG. 11 is a view showing a sealed state of a top part of the laminate exterior body.
【図１２】ラミネート外装体の底部の封止状態を示す図
である。FIG. 12 is a view showing a sealed state of a bottom portion of the laminate exterior body.
【図１３】本発明の第２の形態に係る薄型電池の斜視図
である。FIG. 13 is a perspective view of a thin battery according to a second embodiment of the present invention.
【図１４】本発明の第３の形態に係る薄型電池の斜視図
である。FIG. 14 is a perspective view of a thin battery according to a third embodiment of the present invention.
【図１５】図１５のＣ−Ｃ線矢視断面図である。FIG. 15 is a sectional view taken along line CC of FIG. 15;
【図１６】本発明の第４の形態に係る薄型電池の斜視図
である。FIG. 16 is a perspective view of a thin battery according to a fourth embodiment of the present invention.
【図１７】本発明の第４の形態に係る薄型電池の平面図
である。FIG. 17 is a plan view of a thin battery according to a fourth embodiment of the present invention.
【図１８】本発明の第５の形態に係る薄型電池の一部断
面図である。FIG. 18 is a partial cross-sectional view of a thin battery according to a fifth embodiment of the present invention.
【図１９】比較例１に係る薄型電池の斜視図である。FIG. 19 is a perspective view of a thin battery according to Comparative Example 1.
【図２０】比較例２に係る薄型電池の斜視図である。FIG. 20 is a perspective view of a thin battery according to Comparative Example 2.
【図２１】比較例３に係る薄型電池の斜視図である。FIG. 21 is a perspective view of a thin battery according to Comparative Example 3.
１：ラミネート外装体 ２：渦巻き状電極体 ３：外装体本体部 ４ａ：第１封止部 ４ｂ：第２封止部 ４ｃ：第３封止部 ５ａ，５ｂ：集電タブ １５：アルミニウム層 １６：樹脂層 １７：樹脂層 １８：ラミネート材 1: Laminated exterior 2: spiral electrode body 3: exterior main body 4a: first sealing section 4b: second sealing section 4c: third sealing section 5a, 5b: current collecting tab 15: aluminum layer 16 : Resin layer 17: Resin layer 18: Laminate material
フロントページの続き (72)発明者 中根 育朗 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内 (72)発明者 生川 訓 大阪府守口市京阪本通２丁目５番５号 三 洋電機株式会社内Continued on the front page (72) Inventor Ikuro Nakane 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Nori Ikukawa 2-5-2-5 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd.
Claims (5)
装体を有し、この外装体は、発電要素を収納した外装体
本体部と、外装体本体部の頂部を封止する第１封止部
と、外装体本体部の底部を封止する第２封止部と、外装
体本体部の側端部を封止する第３封止部とから構成さ
れ、しかも、前記第１封止部は、前記発電要素を構成す
る正負極板にそれぞれ付設された集電タブが、電池外に
導出している状態で封止された構造の薄型電池におい
て、 前記第１〜第３封止部のうちの少なくともいずれかの封
止部が、折り曲げられ、且つ折り曲げ部分が外装体本体
部の厚み範囲内に規制されていることを特徴とする薄型
電池。1. An exterior body comprising a sheet-like laminate material, wherein the exterior body has a first body for housing a power generation element and a first seal for sealing a top of the body body. A second sealing portion for sealing a bottom portion of the exterior body main portion, and a third sealing portion for sealing a side end portion of the exterior body main portion, and the first sealing portion. Is a thin battery having a structure in which current collecting tabs respectively attached to positive and negative electrode plates constituting the power generating element are sealed in a state of being led out of the battery, wherein the first to third sealing portions A thin battery, wherein at least one of the sealing portions is bent, and the bent portion is restricted within a thickness range of the outer package body.
それぞれラミネート材の内側面同士が密着するようにラ
ミネート材の端部近傍を重ね合わせ、この重ね合わせ部
を溶着して形成されたものであり、前記第３封止部はラ
ミネート材の内側面と外側面とが密着するようにラミネ
ート材の端部近傍を重ね合わせ、この重ね合わせ部を溶
着して形成されたものであり、 これらの第１封止部及び第２封止部のうちの少なくとも
一方の封止部が、折り曲げられ、且つ折り曲げ部分が外
装体本体部の厚み範囲内に規制されている請求項１記載
の薄型電池。2. The first sealing portion and the second sealing portion,
The laminate is formed by overlapping the vicinity of the end of the laminate so that the inner surfaces of the laminate are in close contact with each other, and welding the overlapped portion. It is formed by overlapping the vicinity of the end of the laminate material so that the outer side surface is in close contact with the laminate, and welding the overlapped portion, and at least one of the first sealing portion and the second sealing portion. 2. The thin battery according to claim 1, wherein one of the sealing portions is bent, and the bent portion is restricted within a thickness range of the exterior body main portion.
記第３封止部は、それぞれラミネート材の内側面同士が
密着するようにラミネート材の端部近傍を重ね合わせ、
この重ね合わせ部を溶着して形成されたものである請求
項１記載の薄型電池。3. The first sealing portion, the second sealing portion, and the third sealing portion overlap each other in the vicinity of an end portion of the laminated material such that inner surfaces of the laminated material are in close contact with each other,
2. The thin battery according to claim 1, wherein the overlapping portion is formed by welding.
それぞれラミネート材の内側面同士が密着するようにラ
ミネート材の端部近傍を重ね合わせ、この重ね合わせ部
を溶着して形成されたものであり、前記第３封止部はラ
ミネート材の外側面同士が密着するようにラミネート材
の端部近傍を重ね合わせ、この重ね合わせ部を溶着して
形成されたものであり、 これらの第１封止部及び第２封止部のうちの少なくとも
一方の封止部が、折り曲げられ、且つ折り曲げ部分が外
装体本体部の厚み範囲内に規制されている請求項１記載
の薄型電池。4. The first sealing portion and the second sealing portion,
The laminate is formed by overlapping the vicinity of the end of the laminate so that the inner surfaces of the laminate are in close contact with each other, and welding the overlapped portion. Are formed by laminating the vicinity of the end portions of the laminated material so that they are in close contact with each other, and welding the overlapped portion. At least one of the first sealing portion and the second sealing portion is sealed. The thin battery according to claim 1, wherein the stop portion is bent, and the bent portion is restricted within a thickness range of the exterior body main portion.
着している請求項１乃至請求項４のいずれかに記載の薄
型電池。5. The thin battery according to claim 1, wherein the bent portion is in close contact with the exterior body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05793798A JP3905973B2 (en) | 1998-03-10 | 1998-03-10 | Thin battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05793798A JP3905973B2 (en) | 1998-03-10 | 1998-03-10 | Thin battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11260327A true JPH11260327A (en) | 1999-09-24 |
| JP3905973B2 JP3905973B2 (en) | 2007-04-18 |
Family
ID=13069949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05793798A Expired - Fee Related JP3905973B2 (en) | 1998-03-10 | 1998-03-10 | Thin battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3905973B2 (en) |
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| JP2000090975A (en) * | 1998-09-09 | 2000-03-31 | Sony Corp | Thin battery and sealing method thereof |
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| US10629857B2 (en) | 2015-02-12 | 2020-04-21 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| JP2016154142A (en) * | 2015-02-12 | 2016-08-25 | 株式会社半導体エネルギー研究所 | Secondary battery and electronic apparatus |
| US11258142B2 (en) | 2015-02-12 | 2022-02-22 | Semiconductor Energy Laboratory Co., Ltd. | Secondary battery and electronic device |
| JP2017010828A (en) * | 2015-06-24 | 2017-01-12 | 古河電池株式会社 | Metal air battery |
| KR20180018051A (en) * | 2016-08-12 | 2018-02-21 | 주식회사 엘지화학 | Secondary Battery And Method For Manufacturing The Same |
| CN111937212A (en) * | 2018-03-30 | 2020-11-13 | 本田技研工业株式会社 | Battery monomer |
| CN111937212B (en) * | 2018-03-30 | 2024-04-26 | 本田技研工业株式会社 | Battery cell |
| WO2021157461A1 (en) | 2020-02-04 | 2021-08-12 | 株式会社エンビジョンＡｅｓｃジャパン | Battery and method for producing battery |
| EP4027437A1 (en) * | 2021-01-12 | 2022-07-13 | SK On Co., Ltd. | Battery cell and method of manufacturing the same |
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