JP2002025514A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JP2002025514A JP2002025514A JP2000210983A JP2000210983A JP2002025514A JP 2002025514 A JP2002025514 A JP 2002025514A JP 2000210983 A JP2000210983 A JP 2000210983A JP 2000210983 A JP2000210983 A JP 2000210983A JP 2002025514 A JP2002025514 A JP 2002025514A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- sealed
- conductive tab
- heat
- electrode conductive
- 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
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、巻回型の電池要素
を有する密閉型電池に関し、特に可撓性の外装材によっ
て電池要素を収納した電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery having a wound battery element, and more particularly to a battery in which a battery element is housed by a flexible exterior material.
【０００２】[0002]
【従来の技術】小型の電子機器の電源として各種の電池
が用いられており、携帯電話、ノートパソコン、カムコ
ーダ等の電源として、小型で大容量の密閉型電池である
リチウムイオン二次電池等の非水電解液電池が用いられ
ている。これらの非水電解液電池としては、円筒型、角
型の構造を有したものが用いられている。小型の電子機
器の電源として用いられているリチウムイオン電池にお
いては、正極集電体および負極集電体にそれぞれ活物質
を塗布した電池を、セパレータを介在させて巻回し電池
缶内に収納して密閉したものが用いられている。ところ
が、電池缶を用いた電池においては、容器としてニッケ
ルめっき軟鋼やアルミニウム合金からなる金属製の材料
を用いているために、小型化、軽量化には限界があり、
外装材には、熱融着性の合成樹脂フィルムとアルミニウ
ム等の金属フィルムとを積層したラミネートフィルムを
用いた電池が提案されている。2. Description of the Related Art Various types of batteries are used as power supplies for small electronic devices, such as lithium-ion secondary batteries, which are small and large-capacity sealed batteries, as power supplies for mobile phones, notebook computers, camcorders and the like. Non-aqueous electrolyte batteries are used. As these non-aqueous electrolyte batteries, batteries having a cylindrical or square structure are used. In a lithium ion battery used as a power source for a small electronic device, a battery in which an active material is applied to each of a positive electrode current collector and a negative electrode current collector is wound with a separator interposed therebetween, and stored in a battery can. Sealed ones are used. However, in a battery using a battery can, since a metal material made of nickel-plated mild steel or an aluminum alloy is used as a container, miniaturization and weight reduction are limited,
As an exterior material, a battery using a laminate film in which a heat-fusible synthetic resin film and a metal film such as aluminum are laminated has been proposed.
【０００３】ラミネートフィルムからなる可撓性の外装
材を用い、合成樹脂フィルムの熱融着によって封口した
密閉型電池としては、電池の外形と同様の大きさの平板
状の正極電極および負極電極をセパレータを介して積層
したものを封口した密閉型電池が用いられていた。ま
た、正極電極、負極電極およびセパレータとして長さの
長い部材を用いて、積層したものの両端部に正極導電タ
ブおよび負極導電タブを取り付けた後に一端より折り畳
むようにして巻回した電池要素を可撓性外装材で封口し
た電池が特開平１１−５４１１１号公報において提案さ
れている。[0003] As a sealed battery using a flexible exterior material made of a laminated film and sealed by heat-sealing a synthetic resin film, a flat positive electrode and a negative electrode having the same size as the outer shape of the battery are used. A sealed battery in which a battery laminated through a separator is sealed is used. In addition, using a long member as a positive electrode, a negative electrode and a separator, a battery element wound around a laminated one with a positive electrode conductive tab and a negative electrode conductive tab attached to both ends and then folded from one end is flexible. A battery sealed with a conductive exterior material has been proposed in JP-A-11-54111.
【０００４】平板状の正極電極と負極電極を積層した密
閉型電池においては、積層した正極電極および負極電極
のそれぞれについて電極導電タブを取り付けて、それら
の電極導電タブを個別に外装材によって周囲を封口して
取り出したり、あるいは各電極導電タブを所望によって
組み合わせて直並列に導電接続を行った後に取り出すこ
とが行われており、正極導電タブあるいは負極導電タブ
の封口は、数多くの個所で行ったり、正極導電タブおよ
び負極導電タブの相互の導電接続やそれぞれが正極電極
あるいは負極電極と接触しないように処理を行うこと等
が必要であった。また、特開平１１−２２４６５２号公
報には、ラミネートシートを外装ケースとする電池が提
案されている。In a sealed battery in which a plate-shaped positive electrode and a negative electrode are stacked, an electrode conductive tab is attached to each of the stacked positive electrode and negative electrode, and these electrode conductive tabs are individually surrounded by an exterior material. Sealing and taking out, or taking out after conducting conductive connection in series and parallel by combining each electrode conductive tab as desired, sealing of the positive electrode conductive tab or the negative electrode conductive tab is performed in many places In addition, it was necessary to perform a mutual conductive connection between the positive electrode conductive tab and the negative electrode conductive tab, and to perform processing so that each of them does not contact the positive electrode or the negative electrode. Japanese Patent Application Laid-Open No. H11-224652 proposes a battery using a laminate sheet as an outer case.
【０００５】これらの可撓性外装材を用いた電池におい
ては、ラミネートシートの熱融着によって封口を行って
いるが、熱融着部における封口特性を良好なものとする
ために、熱融着部を数ｍｍの幅を持たせることが行われ
ている。したがって、ラミネートシートによって封口し
た電池においては、電池の大きさは、電池要素の大きさ
に加えて外装材の熱融着部を加えた大きさとなる。この
ために、小型の機器に使用するためには、電池の外形が
大きくなるという問題点があった。そこで、熱融着部を
折り曲げて投影面積を小さくすることが、特開２０００
−１３８０４０において提案されている。[0005] In batteries using these flexible packaging materials, sealing is performed by heat sealing of the laminate sheet. However, in order to improve the sealing characteristics at the heat sealing portion, heat sealing is performed. It has been practiced to provide a part with a width of several mm. Therefore, in the battery sealed with the laminate sheet, the size of the battery is a size obtained by adding the heat-sealed portion of the exterior material in addition to the size of the battery element. For this reason, there is a problem that the outer shape of the battery becomes large in order to use it in a small device. To reduce the projected area by bending the heat-sealed portion, Japanese Patent Laid-Open Publication No. 2000-2000.
138040.
【０００６】図４は、従来のラミネートシートによって
封口した密閉型電池を電池を説明する図である。図４
（Ａ）に示すように密閉型電池１は、正極導電タブ２お
よび負極導電タブ３を取り付けた電池要素４を可撓性の
外装材５によって熱融着により周囲を封口しているため
に、密閉型電池１の外周部には、熱融着部６が存在して
いる。そこで、図４（Ｂ）に示すように熱融着部６を折
り曲げて、折り曲げ部７を形成し、次いで図４（Ｃ）に
示すように、接着テープ、両面接着テープ、あるいは接
着剤転写テープ等の接着部材８によって熱融着部６の折
り曲げ部７が貼着される。次いで、図４（Ｄ）に示すよ
うに、熱融着部が折り曲げられて貼着された電池の表面
に、電池の商品名、取り扱い注意事項等を記載したラベ
ル９が貼り付けられる。FIG. 4 is a diagram illustrating a conventional sealed battery sealed with a laminate sheet. FIG.
As shown in FIG. 1A, in the sealed battery 1, the battery element 4 to which the positive electrode conductive tab 2 and the negative electrode conductive tab 3 are attached is sealed by heat sealing with a flexible exterior material 5. A heat-sealed portion 6 is present on the outer peripheral portion of the sealed battery 1. Then, as shown in FIG. 4B, the heat-sealed portion 6 is bent to form a bent portion 7, and then, as shown in FIG. 4C, an adhesive tape, a double-sided adhesive tape, or an adhesive transfer tape. The bent portion 7 of the heat-sealed portion 6 is adhered by an adhesive member 8 such as. Next, as shown in FIG. 4 (D), a label 9 describing the product name of the battery, handling precautions, and the like is attached to the surface of the battery where the heat-sealed portion is bent and attached.
【０００７】このような電池においては、ラベルを貼り
付けた部分のうち、熱融着部を折り曲げた個所に重なる
部分おいては、ラベルの部分に盛り上がり部１０が生じ
るために、ラミネートシートによって、薄型化を図って
もその効果が充分に発揮できないという問題点があっ
た。[0007] In such a battery, a portion of the portion where the label is adhered and which overlaps the portion where the heat-sealed portion is bent has a raised portion 10 at the label portion. There is a problem that the effect cannot be sufficiently exhibited even if the thickness is reduced.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、可撓性の外
装材によって封口した密閉型電池において、外装材の接
合部の折り曲げによって生じる盛り上がり部分を小さく
し、電池の厚みが薄い密閉型電池を提供することを課題
とするものである。SUMMARY OF THE INVENTION The present invention relates to a sealed battery in which a raised portion caused by bending of a joint portion of the outer material is reduced in a sealed battery sealed with a flexible outer material, and the battery is thinner. It is an object to provide
【０００９】[0009]
【課題を解決するための手段】本発明の課題は、可撓性
の外装材によって電池要素を封口した密閉型電池におい
て、外装材の封口部は電極導電タブが引き出される部分
を除いて、外装材の接合部は折り曲げられて表示用ラベ
ルの裏面の接着層によって接着されたものである密閉型
電池によって解決することができる。また、電池要素
は、電池要素の中心部にはいずれの電極導電タブも有さ
ず、電池要素が可撓性の外装材に予め形成された凹部に
収納されて、外装材の表面に電池要素の正極導電タブお
よび負極導電タブを位置させた状態で封口した後に、外
装材の封口部は電極導電タブが引き出される部分を除い
て、折り曲げられて表示用ラベルの粘着層によって接着
された前記の密閉型電池である。SUMMARY OF THE INVENTION It is an object of the present invention to provide a sealed battery in which a battery element is sealed with a flexible outer material. The sealed part of the material can be solved by a sealed battery that is bent and bonded by an adhesive layer on the back surface of the display label. In addition, the battery element does not have any electrode conductive tabs in the center of the battery element, and the battery element is housed in a recess formed in advance on a flexible exterior material, and the battery element is placed on the surface of the exterior material. After sealing with the positive electrode conductive tab and the negative electrode conductive tab being positioned, the sealing portion of the exterior material is bent and adhered by the adhesive layer of the display label, except for the portion from which the electrode conductive tab is pulled out. It is a sealed battery.
【００１０】[0010]
【発明の実施の形態】本発明の電池は、電池要素を可撓
性の外装材によって封口した密閉型電池において、可撓
性の外装材を用いた場合には避けることができなかった
封口のための接合部による投影面積の増大を防ぎ、しか
も接合部を折り曲げた場合に生じる膨らみを防止した電
池を提供することによって、電池の厚みを薄くすること
を可能としたものである。BEST MODE FOR CARRYING OUT THE INVENTION The battery of the present invention is a sealed battery in which a battery element is sealed with a flexible outer material. Therefore, it is possible to reduce the thickness of the battery by providing a battery in which an increase in the projected area due to the joint portion is prevented and the swelling that occurs when the joint portion is bent is prevented.
【００１１】図１は、本発明の密閉型電池の一実施例を
説明する図であり、斜視図を示す。本発明の密閉型電池
１は、図１（Ａ）に示すように、可撓性の外装材５によ
って電池要素４を収納し、電解液を注入した後に可撓性
の外装材５の周囲を熱融着して封口される。次いで、図
１（Ｂ）に示すように、熱融着部６は、正極導電タブ２
および負極導電タブ３が存在する部分を除いて折り曲げ
た後に、電池の品名、使用上の注意事項等を印字した粘
着性のラベル９によって熱融着部６の折り曲げ部７を接
着する。このようにして製造した密閉型電池は、熱融着
部６が大きくはみ出すことはなく、また熱融着部の接合
には、電池に添付されるラベルを用いているので、熱融
着部の接合とラベルの重なりによる電池の盛り上がりを
防止することができる。FIG. 1 is a view for explaining an embodiment of the sealed battery of the present invention, and is a perspective view. In the sealed battery 1 of the present invention, as shown in FIG. 1 (A), the battery element 4 is housed by a flexible exterior material 5 and the periphery of the flexible exterior material 5 is injected after the electrolyte is injected. Sealed by heat fusion. Next, as shown in FIG. 1B, the heat-sealed portion 6 is
After bending except for the portion where the negative electrode conductive tab 3 is present, the bent portion 7 of the heat-sealed portion 6 is adhered by an adhesive label 9 on which the name of the battery, precautions for use, and the like are printed. In the sealed battery manufactured in this manner, the heat-fused portion 6 does not protrude greatly, and the label attached to the battery is used for joining the heat-fused portion. The swelling of the battery due to the overlap of the joining and the label can be prevented.
【００１２】また、図２は、本発明の密閉型電池の他の
実施例を説明する図である。密閉型電池１は、図２
（Ａ）に示すように、可撓性の外装材５によって電池要
素４を収納し、電解液を注入した後に可撓性の外装材５
の周囲を熱融着して封口される。次いで、図２（Ｂ）に
示すように、熱融着部６は、正極導電タブ２および負極
導電タブ３が存在する部分を除いて、電池の正面あるい
は裏面側に折り曲げて折り曲げ部７を形成した後に、図
２（Ｃ）に示すように、電池の品名、使用上の注意事項
等を印字した粘着性のラベル９によって熱融着部６の折
り曲げ部７を接着したものである。FIG. 2 is a view for explaining another embodiment of the sealed battery of the present invention. The sealed battery 1 is shown in FIG.
As shown in (A), the battery element 4 is housed by the flexible exterior material 5, and after the electrolyte solution is injected, the flexible exterior material 5 is stored.
Is sealed by heat-sealing. Then, as shown in FIG. 2B, the heat-sealed portion 6 is bent toward the front or back side of the battery to form a bent portion 7 except for the portion where the positive electrode conductive tab 2 and the negative electrode conductive tab 3 are present. After that, as shown in FIG. 2 (C), the bent part 7 of the heat-sealed part 6 is adhered by an adhesive label 9 on which the name of the battery, precautions for use, etc. are printed.
【００１３】このようにして製造した密閉型電池は、図
１に示した電池と同様に熱融着部の折り曲げ部の接合の
ための粘着テープ等を使用していないので、密閉型電池
の投影面積を大きくすることはなく、また電池の盛り上
がりを小さくすることができる。また、本発明の密閉型
電池は、電池要素をラミネートシートに収納して熱融着
によって封口した電池であれば、各種の電池に適用する
ことができる。特に、正極導電タブおよび負極導電タブ
の両者を電池要素の最外周部に設けた電池に適用するこ
とが好ましい。すなわち、このような電池では、正極導
電タブおよび負極導電タブをそれぞれの電極の最外周部
に設けられているので、正極導電タブおよび負極導電タ
ブの両者が実質的に同一平面に位置している。したがっ
て、正極導電タブおよび負極導電タブのいずれも、折り
曲げ加工等をすることなく、同一平面において外装材を
用いて封口することができる。The sealed battery manufactured in this manner does not use an adhesive tape or the like for joining the bent portions of the heat-sealed portion, similarly to the battery shown in FIG. The area is not increased, and the rise of the battery can be reduced. Further, the sealed battery of the present invention can be applied to various batteries as long as the battery elements are housed in a laminate sheet and sealed by heat sealing. In particular, it is preferable to apply the present invention to a battery in which both the positive electrode conductive tab and the negative electrode conductive tab are provided on the outermost peripheral portion of the battery element. That is, in such a battery, since the positive electrode conductive tab and the negative electrode conductive tab are provided on the outermost periphery of each electrode, both the positive electrode conductive tab and the negative electrode conductive tab are located on substantially the same plane. . Therefore, both the positive electrode conductive tab and the negative electrode conductive tab can be sealed on the same plane using the exterior material without bending or the like.
【００１４】図３は、可撓性の部材に収納した電池を説
明する図であり、特に導電タブの取り出しに特徴を有す
る電池を説明する図である。図３（Ａ）は、外装材を示
す図であり、可撓性の外装材５を押圧して成型し電池要
素に合致した大きさの凹部１１を形成する。次いで、図
３（Ｂ）に断面図を示すように、外装材５の凹部１１
に、正極導電タブ２および負極導電タブ（図示せず）を
外周部に設けた電池要素４を収納する。外装材５に設け
た凹部１１は電池要素４の大きさと同等であるので電池
要素に取り付けた正極導電タブ２および負極導電タブ
（図示せず）は、水平に外装材５の表面に接することと
なる。次いで、所定の量の電解液を注入した後に外装材
に設けた折り曲げ線１２に沿って外装材を１８０°折り
曲げて電池要素を覆った後に、減圧装置内において設置
して内部の空気を排気した状態で図３（Ｃ）に示すよう
に、熱融着装置１３によって電池要素の周囲を正極導電
タブおよび負極導電タブも含めて一体に熱融着して封口
し、図３（Ｄ）に示すように、一体にヒートシールした
熱融着部６を有する密閉型電池を作製する。次いで、図
３（Ｅ）に示すように、熱融着部６を折り曲げて折り曲
げ部７を形成した後に、熱融着部６の折り曲げ部７に電
池の名称等を記載した粘着性部材の層を裏面に有するラ
ベル９を貼り付けて接着固定して本発明の電池を得るこ
とができる。FIG. 3 is a diagram illustrating a battery housed in a flexible member, particularly a battery having a feature in taking out a conductive tab. FIG. 3A is a view showing the exterior material, in which the flexible exterior material 5 is pressed and molded to form a recess 11 having a size matching the battery element. Next, as shown in the sectional view of FIG.
Then, the battery element 4 provided with the positive electrode conductive tab 2 and the negative electrode conductive tab (not shown) on the outer periphery is housed. Since the concave portion 11 provided in the exterior member 5 is equivalent to the size of the battery element 4, the positive electrode conductive tab 2 and the negative electrode conductive tab (not shown) attached to the battery element should be in horizontal contact with the surface of the exterior member 5. Become. Next, after injecting a predetermined amount of electrolyte, the exterior material was bent 180 ° along the folding line 12 provided on the exterior material to cover the battery element, and then installed in a decompression device to exhaust the internal air. In this state, as shown in FIG. 3 (C), the periphery of the battery element including the positive electrode conductive tab and the negative electrode conductive tab is integrally heat-sealed and sealed by the heat-sealing device 13, as shown in FIG. 3 (D). Thus, a sealed battery having the heat-sealed portion 6 integrally heat-sealed is manufactured. Next, as shown in FIG. 3 (E), after the heat-sealed portion 6 is bent to form a bent portion 7, a layer of an adhesive member in which the name of the battery or the like is described in the bent portion 7 of the heat-sealed portion 6. Can be obtained by attaching and adhering and fixing a label 9 having on the back surface thereof.
【００１５】本発明の密閉型電池は、各種のリチウムイ
オン電池、ポリマーリチウム電池、水系の密閉型電池等
の各種の密閉型電池に適用することができる。リチウム
イオン電池を例に挙げて説明すると、正極電極は帯状の
アルミニウム箔に、ＬｉxＭＯ2（ただしＭは、少なくと
も１の遷移金属を表す。）である複合酸化物、例えば、
ＬｉxＣｏＯ2、ＬｉxＮｉＯ2、ＬｉxＭｎ2Ｏ4、ＬｉxＭ
ｎＯ3、ＬｉxＮｉyＣｏ(1-y)Ｏ2などを 、カーボンブラ
ック等の導電性物質、ポリフッ化ビニリデン（ＰＶＤ
Ｆ）等の結着剤をＮ−メチル−２−ピロリドン（ＮＭ
Ｐ）等の溶剤とを分散混練した調製した正極塗料が本発
明の塗布装置によって塗布される。片面の塗布が終わっ
たものは乾燥後に反対面も同様に塗布し、両面を塗布さ
れる。The sealed battery of the present invention can be applied to various sealed batteries such as various lithium ion batteries, polymer lithium batteries, and water-based sealed batteries. Taking a lithium ion battery as an example, a positive electrode is formed on a strip-shaped aluminum foil, and a composite oxide of Li x MO 2 (where M represents at least one transition metal), for example,
Li x CoO 2 , Li x NiO 2 , Li x Mn 2 O 4 , Li x M
nO 3 , Li x Ni y Co (1-y ) O 2 , a conductive substance such as carbon black, polyvinylidene fluoride (PVD
F) and the like as a binder such as N-methyl-2-pyrrolidone (NM
A positive electrode paint prepared by dispersing and kneading a solvent such as P) is applied by the coating apparatus of the present invention. After the coating on one side is completed, the opposite side is similarly coated after drying, and both sides are coated.
【００１６】また、負極電極は、帯状の銅箔等の表面
に、リチウムをドープ及び脱ドープ可能な、熱分解炭素
類、ピッチコークス、ニードルコークス、石油コークス
などのコークス類、グラファイト類、ガラス状炭素類、
フェノール樹脂、フラン樹脂などを焼成した有機高分子
化合物焼成体、炭素繊維、活性炭などの炭素質材料、ポ
リアセチレン、ポリピロール等の導電性高分子材料、あ
るいは金属リチウム、リチウム−アルミ合金等のリチウ
ム合金をカーボンブラックなどの導電性物質、ポリフッ
化ビニリデン（ＰＶＤＦ）等の結着剤をＮ−メチル−２
−ピロリドン（ＮＭＰ）等の溶剤とを分散混練した調製
した負極塗布液を本発明の塗布装置によって塗布され
る。片面の塗布が終わったものは乾燥後に反対面も同様
に塗布し、両面を塗布される。なお、負極電極にあって
は、巻回して電池要素を作製した場合に片面が正極活物
質層に対向しない部分にあっては、片面のみに負極活物
質層を形成しても良い。次いで、負極電極および正極電
極に負極導電タブおよび正極導電タブを、超音波溶接、
抵抗溶接等の方法によって接合した後に、巻回装置で巻
回し、巻止めテープによって電池要素を固定した後に、
圧迫して所定の形状に成型し製造することができる。The negative electrode is made of coke, such as pyrolytic carbon, pitch coke, needle coke, petroleum coke, graphite, glass, and the like, which can be doped and dedoped with lithium on the surface of a strip-shaped copper foil or the like. Carbons,
Organic polymer compound fired body of phenol resin, furan resin, etc., carbonaceous material such as carbon fiber, activated carbon, conductive polymer material such as polyacetylene, polypyrrole, or lithium alloy such as lithium metal, lithium-aluminum alloy Conductive substances such as carbon black and binders such as polyvinylidene fluoride (PVDF)
-A negative electrode coating solution prepared by dispersing and kneading a solvent such as pyrrolidone (NMP) is applied by the coating apparatus of the present invention. After the coating on one side is completed, the opposite side is similarly coated after drying, and both sides are coated. In the case where the negative electrode is wound and a battery element is manufactured, if one surface is not opposed to the positive electrode active material layer, the negative electrode active material layer may be formed only on one surface. Next, a negative electrode conductive tab and a positive electrode conductive tab were connected to the negative electrode and the positive electrode by ultrasonic welding,
After joining by a method such as resistance welding, winding with a winding device, and fixing the battery element with a winding tape,
It can be pressed and molded into a predetermined shape to manufacture.
【００１７】本発明の密閉型電池に使用することができ
る外装材としては、アルミニウム箔の電池内面に位置す
る面にポリエチレン、ポリプロピレン、アイオノマー、
エチレン−メタクリレート共重合樹脂、エチレン−（メ
タ）クリレート共重合樹脂、などの熱可塑性樹脂層を接
着剤層を介して、あるいは接着剤層を用いずに熱融着に
より貼り合わせ、反対側にはポリエチレンテレフタレー
ト等のポリエステル樹脂、あるいはナイロン樹脂等を積
層したものが用いられる。As the exterior material that can be used in the sealed battery of the present invention, polyethylene, polypropylene, ionomer,
A thermoplastic resin layer such as an ethylene-methacrylate copolymer resin or an ethylene- (meth) acrylate copolymer resin is bonded by heat fusion with or without an adhesive layer. A laminate of a polyester resin such as polyethylene terephthalate or a nylon resin is used.
【００１８】また、内面のポリエチレン、ポリプロピレ
ン等の接合面から水分が電池容器内に浸入すると、電解
質として使用されているＬｉＰＦ6 等が分解してフッ化
水素酸が生成し、電池活物質への悪影響や、外装材のア
ルミニウムの腐食等の問題も生じるために封口面の性能
を長期にわたって維持することは極めて重要である。封
口面の熱融着特性の改善のために、内面のフィルムに
は、融着特性が良好な未延伸ポリエチレンフィルムを用
いても良く、また、少なくとも封口面には、マレイン酸
変成オレフィン樹脂層を形成したものであってもよい。
さらに、正極導電タブおよび負極導電タブと外装材が接
触する部分には、予めマレイン酸オレフィン等を塗布し
て表面処理したり、マレイン酸オレフィンフィルム等で
被覆し外装材との接合強度を高めたものであっても良
い。When water enters the battery container from the inner surface of the inner surface of the battery such as polyethylene or polypropylene, LiPF 6 or the like used as an electrolyte is decomposed to generate hydrofluoric acid, which is used as a battery active material. It is extremely important to maintain the performance of the sealing surface for a long period of time because problems such as adverse effects and corrosion of aluminum of the exterior material occur. In order to improve the heat sealing property of the sealing surface, an unstretched polyethylene film having good sealing properties may be used for the film on the inner surface, and at least the sealing surface is provided with a maleic acid-modified olefin resin layer. It may be formed.
Further, the portion where the positive electrode conductive tab and the negative electrode conductive tab are in contact with the exterior material is subjected to a surface treatment by applying a maleic olefin or the like in advance, or is coated with a maleic olefin film or the like to increase the bonding strength with the exterior material. It may be something.
【００１９】具体例を挙げれば、外装材の熱融着部を折
り曲げて折り曲げ部を形成した後に、電池の品名、使用
上の注意事項等を印字したポリエステル製の厚さ２５μ
ｍであって、裏面に２５μｍの接着層を形成したラベル
によって折り曲げ部を接着することによって、折り曲げ
部とラベルによって電池の厚みが増加することがない電
池を得ることができる。As a specific example, after the heat-sealed portion of the exterior material is bent to form a bent portion, the product name of the battery, precautions for use, etc. are printed, and the thickness of the polyester is 25 μm.
By bonding the bent portion with a label having an adhesive layer of 25 μm on the back surface, a battery can be obtained in which the thickness of the battery does not increase due to the bent portion and the label.
【００２０】[0020]
【発明の効果】本発明の密閉型電池は、可撓性の外装材
の熱融着部を折り曲げた部分を粘着層を有するラベルに
よって貼着して固定したので、熱融着部の接着用の専用
の部材を必要とせず、熱融着部の接着による盛り上がり
等を防止することができる。According to the sealed battery of the present invention, the bent portion of the heat-sealed portion of the flexible exterior material is fixed by sticking it with a label having an adhesive layer. This eliminates the need for a dedicated member, and can prevent swelling or the like due to adhesion of the heat-sealed portion.
【図１】図１は、本発明の密閉型電池の一実施例を説明
する図である。FIG. 1 is a diagram illustrating an embodiment of a sealed battery according to the present invention.
【図２】図２は、本発明の密閉型電池の他の実施例を説
明する図である。FIG. 2 is a diagram illustrating another embodiment of the sealed battery of the present invention.
【図３】図３は、可撓性の部材に収納した電池を説明す
る図である。FIG. 3 is a diagram illustrating a battery housed in a flexible member.
【図４】図４は、従来のラミネートシートによって封口
した密閉型電池を電池を説明する図である。[FIG. 4] FIG. 4 is a diagram illustrating a sealed battery that is sealed with a conventional laminated sheet.
１…密閉型電池、２…正極導電タブ、３…負極導電タ
ブ、４…電池要素、５…可撓性の外装材、６…熱融着
部、７…折り曲げ部、８…接着部材、９…ラベル、１０
…盛り上がり部、１１…凹部、１２…折り曲げ線、１３
…熱融着装置DESCRIPTION OF SYMBOLS 1 ... Sealed battery, 2 ... Positive electrode conductive tab, 3 ... Negative electrode conductive tab, 4 ... Battery element, 5 ... Flexible exterior material, 6 ... Heat fusion part, 7 ... Bending part, 8 ... Adhesive member, 9 … Label, 10
... bulging part, 11 ... concave part, 12 ... bending line, 13
… Heat fusion equipment
Claims (1)
した密閉型電池において、外装材の封口部は電極導電タ
ブが引き出される部分を除いて、外装材の接合部は折り
曲げられて表示用ラベルの裏面の接着層によって接着さ
れたものであることを特徴とする密閉型電池。In a sealed battery in which a battery element is sealed with a flexible outer material, a sealing portion of the outer material is bent at a joint portion of the outer material except for a portion from which an electrode conductive tab is drawn out, so that a display portion is formed. A sealed battery characterized by being adhered by an adhesive layer on the back surface of a label.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210983A JP2002025514A (en) | 2000-07-12 | 2000-07-12 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210983A JP2002025514A (en) | 2000-07-12 | 2000-07-12 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002025514A true JP2002025514A (en) | 2002-01-25 |
Family
ID=18707170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000210983A Pending JP2002025514A (en) | 2000-07-12 | 2000-07-12 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002025514A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002042772A (en) * | 2000-07-25 | 2002-02-08 | Mitsubishi Electric Corp | Battery |
| EP1686636A1 (en) * | 2003-10-07 | 2006-08-02 | NEC Lamilion Energy, Ltd. | Film-clad battery and method of producing film-clad battery |
| JP2008078118A (en) * | 2006-09-18 | 2008-04-03 | Lg Chem Ltd | Pouch type secondary battery with improved safety |
| KR100883919B1 (en) | 2006-04-03 | 2009-02-18 | 주식회사 엘지화학 | Battery Pack of Large Capacity |
| JP2011070977A (en) * | 2009-09-28 | 2011-04-07 | Murata Mfg Co Ltd | Laminated battery |
| KR101049011B1 (en) | 2009-10-06 | 2011-07-12 | 삼성에스디아이 주식회사 | Secondary Battery and Manufacturing Method Thereof |
| CN102315394A (en) * | 2010-07-01 | 2012-01-11 | 江门市力源电子有限公司 | Polymer (flexible package) lithium ion battery top encapsulating method |
| EP2492989A1 (en) * | 2011-02-24 | 2012-08-29 | Samsung SDI Co., Ltd. | Pouch type battery and method of manufacturing the same |
| US9083013B2 (en) | 2010-07-28 | 2015-07-14 | Tdk Corporation | Electrochemical device |
| JP2017130445A (en) * | 2016-01-15 | 2017-07-27 | Fdk株式会社 | Laminate-type power storage element and card electronic device |
| KR101839566B1 (en) * | 2015-06-10 | 2018-03-16 | 주식회사 엘지화학 | Apparatus of Attaching Sheets to Secondary Battery Pack |
| CN113597701A (en) * | 2020-03-24 | 2021-11-02 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
-
2000
- 2000-07-12 JP JP2000210983A patent/JP2002025514A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002042772A (en) * | 2000-07-25 | 2002-02-08 | Mitsubishi Electric Corp | Battery |
| US8697277B2 (en) | 2003-10-07 | 2014-04-15 | Nec Corporation | Film-clad battery and method of producing film-clad battery |
| EP1686636A1 (en) * | 2003-10-07 | 2006-08-02 | NEC Lamilion Energy, Ltd. | Film-clad battery and method of producing film-clad battery |
| EP1686636A4 (en) * | 2003-10-07 | 2009-04-22 | Nec Corp | Film-clad battery and method of producing film-clad battery |
| KR100883919B1 (en) | 2006-04-03 | 2009-02-18 | 주식회사 엘지화학 | Battery Pack of Large Capacity |
| JP2008078118A (en) * | 2006-09-18 | 2008-04-03 | Lg Chem Ltd | Pouch type secondary battery with improved safety |
| JP2011070977A (en) * | 2009-09-28 | 2011-04-07 | Murata Mfg Co Ltd | Laminated battery |
| KR101049011B1 (en) | 2009-10-06 | 2011-07-12 | 삼성에스디아이 주식회사 | Secondary Battery and Manufacturing Method Thereof |
| US9196919B2 (en) | 2009-10-06 | 2015-11-24 | Samsung Sdi Co., Ltd. | Secondary battery and manufacturing method of the same |
| CN102315394A (en) * | 2010-07-01 | 2012-01-11 | 江门市力源电子有限公司 | Polymer (flexible package) lithium ion battery top encapsulating method |
| US9083013B2 (en) | 2010-07-28 | 2015-07-14 | Tdk Corporation | Electrochemical device |
| US20120219847A1 (en) * | 2011-02-24 | 2012-08-30 | Samsung Sdi Co., Ltd. | Pouch type battery and its manufacturing method |
| CN102651460A (en) * | 2011-02-24 | 2012-08-29 | 三星Sdi株式会社 | Pouch type battery and method of manufacturing the same |
| EP2492989A1 (en) * | 2011-02-24 | 2012-08-29 | Samsung SDI Co., Ltd. | Pouch type battery and method of manufacturing the same |
| KR101839566B1 (en) * | 2015-06-10 | 2018-03-16 | 주식회사 엘지화학 | Apparatus of Attaching Sheets to Secondary Battery Pack |
| US10483505B2 (en) | 2015-06-10 | 2019-11-19 | Lg Chem, Ltd. | Sheet attachment device for battery packs |
| JP2017130445A (en) * | 2016-01-15 | 2017-07-27 | Fdk株式会社 | Laminate-type power storage element and card electronic device |
| CN113597701A (en) * | 2020-03-24 | 2021-11-02 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
| CN113597701B (en) * | 2020-03-24 | 2023-04-18 | 东莞新能安科技有限公司 | Electrochemical device and electronic device |
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