JP2001345090A - Sealed battery - Google Patents
Sealed batteryInfo
- Publication number
- JP2001345090A JP2001345090A JP2000161811A JP2000161811A JP2001345090A JP 2001345090 A JP2001345090 A JP 2001345090A JP 2000161811 A JP2000161811 A JP 2000161811A JP 2000161811 A JP2000161811 A JP 2000161811A JP 2001345090 A JP2001345090 A JP 2001345090A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- electrode terminal
- thermal conductivity
- battery
- negative electrode
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 50
- 239000011347 resin Substances 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 6
- 230000004927 fusion Effects 0.000 abstract description 15
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 239000000805 composite resin Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 239000011888 foil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
(57)【要約】
【課題】 フィルムパッケージ式の密閉形電池における
端子部分の融着封止の信頼性を向上させることを目的と
する。
【解決手段】 熱伝導度が高い方の端子の、封止部から
極群に至る部分の（断面積／距離）の値を、熱伝導度が
低い方の端子の、封止部から極群に至る部分の（断面積
／距離）の値よりも小さくすることで、上記課題を解決
できる。
(57) [Problem] To improve the reliability of fusion sealing of a terminal portion in a film package type sealed battery. SOLUTION: The value of (cross-sectional area / distance) of a portion of a terminal having a higher thermal conductivity from a sealing portion to a pole group is changed from a sealing portion of a terminal having a lower thermal conductivity to a pole group. The above-mentioned problem can be solved by making the value (cross-sectional area / distance) smaller than the value of the portion reaching.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は熱融着によって封止
密閉された密閉形電池に関し、特にフィルムパッケージ
電池のシール部分近傍に係る端子形状に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery hermetically sealed by heat sealing, and more particularly to a terminal shape in the vicinity of a sealed portion of a film package battery.
【０００２】[0002]
【従来の技術】近年、電子技術の大きな進歩により、一
般ユーザー向けの携帯機器の小型軽量化が進んでいる。
電池に対しても小型軽量化の要求が高まっている。2. Description of the Related Art In recent years, with the great progress in electronic technology, portable devices for general users have been reduced in size and weight.
The demand for smaller and lighter batteries is also increasing.
【０００３】リチウムイオン電池の外装体を例に挙げ
て、小型軽量化の動向を説明する。従来の外装体は長期
信頼性に優れる金属成形品が主に用いられ、その中で鉄
やステンレス等の重い材質からアルミニウム等の軽い材
質へと転換が計られてきた。さらに、最近はアルミニウ
ム箔を芯材として内面に融着性樹脂層、外面に保護樹脂
層をラミネートした金属樹脂複合フィルムを外装体とし
て採用し、軽量化・薄型化を一層進める試みがなされて
いる。これに伴い、厚さ数ミリのフィルムパッケージ電
池の実現が可能になった。[0003] The trend of miniaturization and weight reduction will be described by taking an exterior body of a lithium ion battery as an example. As the conventional exterior body, a metal molded product having excellent long-term reliability is mainly used, and a change from a heavy material such as iron or stainless steel to a light material such as aluminum has been measured. Furthermore, recently, attempts have been made to further reduce the weight and thickness by using a metal resin composite film in which an aluminum foil is used as a core material and a fusible resin layer is laminated on an inner surface and a protective resin layer is laminated on an outer surface as an outer package. . Accordingly, a film package battery having a thickness of several millimeters can be realized.
【０００４】図４に示すように、一般的なフィルムパッ
ケージ電池１０は、電解質層を介して正極及び負極が積
層された略偏平直方体形状の極群１と、正極および負極
にそれぞれ連結された正極端子２および負極端子３と、
正極端子２の開放端部２Ａ及び負極端子３の開放端部３
Ａが外部露出するように極群１を気密封止するパッケー
ジ４とを有している。As shown in FIG. 4, a general film package battery 10 has a substantially flat rectangular parallelepiped electrode group 1 in which a positive electrode and a negative electrode are laminated via an electrolyte layer, and a positive electrode connected to the positive electrode and the negative electrode, respectively. Terminal 2 and negative electrode terminal 3,
Open end 2A of positive terminal 2 and open end 3 of negative terminal 3
And a package 4 for hermetically sealing the pole group 1 so that A is exposed to the outside.
【０００５】このようなフィルムパッケージ電池１０
は、芯材として採用したアルミニウム箔からなる金属箔
層の片面あるいは両面に融着性樹脂層がラミネートされ
た金属樹脂複合フィルム５を用意し、これらの金属樹脂
複合フィルム５を電池本体１０の平面および底面に接す
るように配置した後、正極端子２の開放端部２Ａおよび
負極端子３の開放端部３Ａが外部露出するように、金属
樹脂複合フィルム５，５の周部同士を互いに融着して、
溶着代６Ａ〜６Ｄにより極群１０が気密封止されてい
る。[0005] Such a film package battery 10
Prepares a metal-resin composite film 5 in which a fusible resin layer is laminated on one or both sides of a metal foil layer made of aluminum foil used as a core material, and the metal-resin composite film 5 is placed on the flat surface of the battery body 10. Then, the peripheral portions of the metal resin composite films 5 and 5 are fused together so that the open end 2A of the positive electrode terminal 2 and the open end 3A of the negative electrode terminal 3 are exposed to the outside. hand,
The electrode group 10 is hermetically sealed by the welding margins 6A to 6D.
【０００６】フィルムパッケージ電池においては、前記
融着封止部分の密閉性が重要であった。特にリチウムイ
オン電池に採用する場合、前記密閉性が不十分である
と、電解液の揮発や漏洩、あるいは外部からの水分の浸
入により著しく電池性能が低下する。In a film package battery, the hermeticity of the fusion-sealed portion is important. In particular, when the battery is used in a lithium ion battery, if the sealing property is insufficient, the battery performance is significantly reduced due to volatilization and leakage of the electrolyte or intrusion of moisture from the outside.
【０００７】なかでも、正極端子２及び負極端子３が前
記融着封止部を横断している端子封止部２Ｂ，３Ｂに係
る封止は技術的に最も難しく、密閉性が不十分となる場
合が多かった。端子部に係る封止の信頼性を高めるた
め、特開昭６２−６１２６８号公報、特開昭６３−２３
２２６５号公報には、端子表面にあらかじめ樹脂層を形
成させておく方法が提示されている。また、特開平１−
２９２７４６号公報には、端子にクロメート処理を施す
方法が提示されている。しかしながら、上記のような対
策を講じてもなお、端子部に係る封止の信頼性は必ずし
も十分ではなかった。In particular, the sealing of the terminal sealing portions 2B, 3B in which the positive electrode terminal 2 and the negative electrode terminal 3 cross the fusion sealing portion is technically the most difficult, and the sealing performance is insufficient. In many cases. In order to enhance the reliability of sealing of the terminal portion, Japanese Patent Application Laid-Open Nos. Sho 62-61268 and 63-23
No. 2,265 discloses a method in which a resin layer is formed on a terminal surface in advance. Further, Japanese Patent Laid-Open No.
Japanese Patent Publication No. 292746 discloses a method of subjecting a terminal to a chromate treatment. However, even after taking the above measures, the reliability of the sealing of the terminal portion was not always sufficient.
【０００８】フィルムパッケージ式の密閉形電池におい
ては、正極端子の材料と負極端子の材料が異なることが
多い。例えば、リチウムイオン電池の正極端子にはアル
ミニウム等が用いられ、負極端子にはニッケルや銅等が
用いられる。In a film package type sealed battery, the material of the positive electrode terminal is often different from the material of the negative electrode terminal. For example, aluminum or the like is used for a positive electrode terminal of a lithium ion battery, and nickel or copper is used for a negative electrode terminal.
【０００９】このように、端子の材料が異なると、熱伝
導率の値が材料ごとに異なるので、同一の端子形状であ
れば端子の熱伝導度が異なる。このとき、同一の加熱条
件によって熱融着しようとした場合、融着部に加えられ
た熱は端子を伝って熱容量の大きい極群方向へ逃げる。
そのため、熱伝導度の高い方の端子の融着部は所定の温
度まで上昇しきらず、端子部分の融着封止が不十分とな
る虞れがあった。一方、加熱条件の温度が高すぎると、
融着性樹脂層が破壊し、端子−パッケージ間に絶縁破壊
を生じやすいといった問題があった。As described above, if the material of the terminal is different, the value of the thermal conductivity is different for each material. Therefore, if the terminal shape is the same, the thermal conductivity of the terminal is different. At this time, when trying to perform heat fusion under the same heating condition, the heat applied to the fusion portion is transmitted to the terminal and escapes to the pole group having a large heat capacity.
For this reason, the fused portion of the terminal having the higher thermal conductivity does not completely rise to a predetermined temperature, and there is a possibility that the fusion sealing of the terminal portion becomes insufficient. On the other hand, if the temperature of the heating conditions is too high,
There has been a problem that the fusible resin layer is broken and dielectric breakdown easily occurs between the terminal and the package.
【００１０】しかしながら、正極端子近傍と負極端子近
傍とで融着時の加熱条件を変えることは、装置が複雑と
なり、生産上非効率である。実用的でない。従って、フ
ィルムパッケージ式の密閉形電池の生産効率を上げるた
めには、融着封止工程は同時に、且つ同一条件で行うこ
とが求められていた。However, changing the heating conditions at the time of fusion between the vicinity of the positive electrode terminal and the vicinity of the negative electrode terminal complicates the apparatus and is inefficient in production. Not practical. Therefore, in order to increase the production efficiency of the sealed battery of the film package type, it is required that the fusion sealing step be performed simultaneously and under the same conditions.
【００１１】[0011]
【発明が解決しようとする課題】本発明は上記問題点に
鑑みなされたものであり、複雑な製造装置を必要とせ
ず、フィルムパッケージ式の密閉形電池における端子部
分の融着封止の信頼性を向上させることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and does not require a complicated manufacturing apparatus. The purpose is to improve.
【００１２】[0012]
【課題を解決するための手段】上記課題を解決するた
め、本発明の密閉形電池は、極群に接続された正極端子
および負極端子が、融着性樹脂による封止部を横断して
いる構造を有する電池において、前記正極端子と前記負
極端子とが熱伝導率の異なる導電性材料からなり、熱伝
導度が高い方の端子の、前記封止部から前記極群に至る
部分の（断面積／距離）の値が、熱伝導度が低い方の端
子の、前記封止部から前記極群に至る部分の（断面積／
距離）の値よりも小さいことを特徴としている。In order to solve the above problems, in a sealed battery according to the present invention, a positive electrode terminal and a negative electrode terminal connected to a pole group cross a sealing portion made of a fusible resin. In a battery having a structure, the positive electrode terminal and the negative electrode terminal are made of conductive materials having different thermal conductivities, and a portion of the terminal having a higher thermal conductivity from the sealing portion to the electrode group is cut off. Area / distance) of the terminal having a lower thermal conductivity (cross-sectional area /
Distance).
【００１３】このような構成によれば、融着時に加えら
れた熱の伝導度が正極端子と負極端子とで近い値、好ま
しくは同一となり、両極端子の封止部分の融着温度を近
似させることができるので、融着封止の不良を低減でき
る。According to such a configuration, the conductivity of the heat applied at the time of fusion between the positive electrode terminal and the negative electrode terminal is close to each other, preferably the same, so that the fusion temperature of the sealed portions of the bipolar terminals is approximated. Therefore, defects in fusion sealing can be reduced.
【００１４】また、本発明の密閉形電池は、極群に接続
された正極端子および負極端子が、融着性樹脂による封
止部を横断している構造を有する電池において、前記正
極端子と前記負極端子とが熱伝導率の異なる導電性材料
からなり、熱伝導度が高い方の端子の、前記封止部から
前記極群に至る部分の少なくとも一部を切除した形状を
有していることを特徴としている。Further, the sealed battery according to the present invention is a battery having a structure in which a positive electrode terminal and a negative electrode terminal connected to an electrode group cross a sealing portion made of a fusible resin. The negative electrode terminal is made of a conductive material having a different thermal conductivity, and the terminal having the higher thermal conductivity has a shape in which at least a part of a portion from the sealing portion to the electrode group is cut off. It is characterized by.
【００１５】このような構成によれば、端子の少なくと
も一部の断面積、例えば幅を変える、パンチ穴を開け
る、メッシュ形状とする、といった簡便な方法により、
端子の封止部分の融着温度を近似させることができるの
で、複雑な装置や複雑な操作を必要としなくても融着封
止の不良を低減できる。According to such a configuration, the cross-sectional area of at least a part of the terminal, for example, a width, a punch hole, a mesh shape, or the like can be obtained by a simple method.
Since the fusion temperature of the terminal sealing portion can be approximated, the defect of fusion sealing can be reduced without requiring a complicated device or complicated operation.
【００１６】また、本発明の密閉形電池は、極群に接続
された正極端子および負極端子が、融着性樹脂による封
止部を横断している構造を有する電池において、前記正
極端子と前記負極端子とが熱伝導率の異なる導電性材料
からなり、熱伝導度が高い方の端子の、前記封止部から
前記極群に至る距離が、熱伝導度が低い方の端子の、前
記封止部から前記極群に至る距離よりも長いことを特徴
としている。The sealed battery according to the present invention has a structure in which a positive electrode terminal and a negative electrode terminal connected to an electrode group cross a sealing portion made of a fusible resin. The negative electrode terminal is made of a conductive material having a different thermal conductivity, and the distance between the terminal having the higher thermal conductivity and the electrode group from the sealing portion is the terminal having the lower thermal conductivity. It is characterized in that it is longer than the distance from the stop to the pole group.
【００１７】このような構成によれば、例えば端子を接
続する極群のタブの寸法を変えるといった簡便な方法に
より、端子の封止部分の融着温度を近似させることがで
きるので、複雑な装置や複雑な操作を必要としなくても
融着封止の不良を低減できる。According to such a configuration, the fusing temperature of the sealing portion of the terminal can be approximated by a simple method such as changing the dimensions of the tabs of the pole group for connecting the terminal. And the defect of fusion sealing can be reduced without requiring complicated operations.
【００１８】一般に、材料はそれぞれ固有の熱伝導率を
持っている。例えば、正極端子と負極端子の材料がそれ
ぞれアルミニウムとニッケルである場合を例に採れば、
２００℃において、アルミニウムの熱伝導率は２３７
（Ｗ・ｍ-1・Ｋ-1）であり、ニッケルの熱伝導率は７５
（Ｗ・ｍ-1・Ｋ-1）であり、その比は約3：１である。こ
こで、 熱伝導度＝熱伝導率×（断面積／距離） で表されるので、熱伝導率の異なる材料の熱伝導度を近
似させるには、熱伝導率が小さい方の（断面積／距離）
の値を、熱伝導率が大きい方の材料のそれよりも相対的
に大きくすればよい。具体的には、熱伝導率が大きい方
の材料の断面積を相対的に小さくする、及び／または、
距離を相対的に長くすればよい。Generally, each material has its own thermal conductivity. For example, taking the case where the materials of the positive electrode terminal and the negative electrode terminal are aluminum and nickel, respectively,
At 200 ° C., the thermal conductivity of aluminum is 237
(W · m −1 · K −1 ), and the thermal conductivity of nickel is 75
(W · m −1 · K −1 ), and the ratio is about 3: 1. Here, since the thermal conductivity is represented by thermal conductivity = thermal conductivity × (cross-sectional area / distance), to approximate the thermal conductivity of materials having different thermal conductivity, the smaller thermal conductivity (cross-sectional area / distance)
Should be relatively larger than that of the material having the higher thermal conductivity. Specifically, the cross-sectional area of the material having the higher thermal conductivity is relatively reduced, and / or
The distance may be relatively long.
【００１９】[0019]
【発明の実施の形態】以下、本発明電池の実施形態を図
面に基づいて詳細に説明するが、本発明はこれらの記載
により限定されるものではない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the battery of the present invention will be described in detail with reference to the drawings, but the present invention is not limited by these descriptions.
【００２０】（実施例１）図１は、本発明電池の裏面か
らの透視図である。極群１は、電解液を含む正極、セパ
レータ及び負極の積層体で構成されている。アルミニウ
ム製の正極端子２及びニッケル製の負極端子３が、極群
１の正極及び負極にそれぞれ接続している。極群１を内
包して気密封止するパッケージ４は、厚さ約４０μｍの
アルミニウム箔を芯材とし、外面に厚さ約１０μｍのポ
リエステル樹脂層、内面に熱融着性を有する厚さ約８０
μｍの酸変性ポリプロピレン樹脂層をラミネートした金
属樹脂複合フィルムからなる。正極端子２及び負極端子
３は、金属樹脂複合フィルムの内面に配置された樹脂層
と融着され、端子２，３とパッケージ４の間が気密封止
されている。Example 1 FIG. 1 is a perspective view of the battery of the present invention as viewed from the back. The electrode group 1 is composed of a laminate of a positive electrode containing an electrolytic solution, a separator, and a negative electrode. A positive electrode terminal 2 made of aluminum and a negative electrode terminal 3 made of nickel are connected to the positive electrode and the negative electrode of the electrode group 1, respectively. The package 4 enclosing the electrode group 1 and hermetically sealed is made of an aluminum foil having a thickness of about 40 μm as a core material, a polyester resin layer having a thickness of about 10 μm on the outer surface, and a heat-fusing thickness of about 80 μm on the inner surface.
It is composed of a metal resin composite film laminated with a μm acid-modified polypropylene resin layer. The positive electrode terminal 2 and the negative electrode terminal 3 are fused to a resin layer disposed on the inner surface of the metal-resin composite film, and the space between the terminals 2 and 3 and the package 4 is hermetically sealed.
【００２１】ここで、端子上の封止部分から電極に至る
部分の熱伝導度を同一にするため、最大幅５ｍｍ、厚さ
１００μｍの両極端子２，３のうち、負極端子の封止部
３Ｂから電極に至る部分の幅aを最大幅の約３倍である
１５ｍｍとした。各端子封止部２Ｂ，３Ｂから電極の先
端に至る部分の距離ｂは４ｍｍとした。Here, in order to make the thermal conductivity of the portion from the sealing portion on the terminal to the electrode the same, of the bipolar terminals 2 and 3 having a maximum width of 5 mm and a thickness of 100 μm, the sealing portion 3B of the negative terminal is formed. The width a of the portion from the electrode to the electrode was 15 mm, which is about three times the maximum width. The distance b from the terminal sealing portions 2B, 3B to the tip of the electrode was 4 mm.
【００２２】溶着代６Ａ〜６Ｄを熱融着により封止し
た。封止は、上下からヒートブロックを当て、表１に示
す２つの条件を用いて行った。「条件１」は、厚さ１０
０μｍ、幅６ｍｍのニッケル端子を封止するに適した条
件であり、「条件２」は、厚さ１００μｍ、幅６ｍｍの
アルミニウム端子を封止するに適した条件である。以上
の操作により、本発明電池を作成した。The welding margins 6A to 6D were sealed by heat fusion. The sealing was performed by applying a heat block from above and below and using the two conditions shown in Table 1. "Condition 1" is a thickness of 10
This is a condition suitable for sealing a nickel terminal having a thickness of 0 μm and a width of 6 mm, and “condition 2” is a condition suitable for sealing an aluminum terminal having a thickness of 100 μm and a width of 6 mm. Through the above operations, the battery of the present invention was prepared.
【００２３】[0023]
【表１】 [Table 1]
【００２４】（実施例２）図２に示すように、最大幅５
ｍｍ、厚さ１００μｍの両極端子２，３のうち、正極端
子２の封止部２Ｂから電極に至る部分の幅ｃを最大幅の
約１／３である１．６ｍｍとしたことを除いては実施例
１と同一条件で電池を作成した。(Embodiment 2) As shown in FIG.
mm and a thickness of 100 μm, except that the width c of the portion from the sealing portion 2B of the positive electrode terminal 2 to the electrode was 1.6 mm, which is about １ ／ of the maximum width. A battery was prepared under the same conditions as in Example 1.
【００２５】（実施例３）図３に示すように、正極端子
２及び負極端子３は幅５ｍｍ、厚さ１００μｍとし、負
極端子封止部３Ｂから負極の先端に至る部分の距離ｄ
を、距離ｂの１／３である１．３ｍｍとしたことを除い
ては実施例１と同一条件で電池を作成した。(Embodiment 3) As shown in FIG. 3, the positive electrode terminal 2 and the negative electrode terminal 3 have a width of 5 mm and a thickness of 100 μm, and a distance d from the negative terminal sealing portion 3B to the tip of the negative electrode.
Was set to 1.3 mm, which is 1/3 of the distance b, to produce a battery under the same conditions as in Example 1.
【００２６】（比較例）図６に示すように、両極端子
２，３の幅を５ｍｍ、厚さを１００μｍとしたことを除
いては実施例１と同一条件で電池を作成した。Comparative Example As shown in FIG. 6, a battery was prepared under the same conditions as in Example 1 except that the width of the bipolar terminals 2 and 3 was 5 mm and the thickness was 100 μm.
【００２７】（絶縁性試験及び接着強度測定）上記実施
例１〜３及び比較例の電池について、「正極端子−金属
樹脂複合フィルムの金属箔層間」及び「負極端子−金属
樹脂複合フィルムの金属箔層間」について導通の有無を
調べる絶縁性試験を行った。また、「正極端子−負極端
子間」について電圧異常の有無を確認した。(Insulation Test and Measurement of Adhesive Strength) Regarding the batteries of Examples 1 to 3 and Comparative Example, “a positive electrode terminal—a metal foil layer of a metal resin composite film” and “a negative electrode terminal—a metal foil of a metal resin composite film” An insulation test was conducted to check the presence / absence of continuity of the “layer”. In addition, the presence or absence of a voltage abnormality was checked for “between the positive electrode terminal and the negative electrode terminal”.
【００２８】次に、端子が封止部を横断している端子封
止部のみを５ｍｍの幅に正確に切り出し、引張り試験機
を用い、Ｔ型剥離法により、「正極端子−金属樹脂複合
フィルムの金属箔層間」及び「負極端子−金属樹脂複合
フィルムの金属箔層間」の接着強度を測定した。Next, only the terminal sealing portion where the terminal crosses the sealing portion is accurately cut out to a width of 5 mm, and the “positive terminal-metal resin composite film” is formed by a T-type peeling method using a tensile tester. Of the metal foil layer and between the negative electrode terminal and the metal foil layer of the metal resin composite film.
【００２９】結果を表２に示す。短絡が確認されたもの
については発生部位を記入した。また、十分な接着強度
が得られたものに○、接着強度が不足しているものに×
を記入した。The results are shown in Table 2. For those where a short circuit was confirmed, the site of occurrence was noted. In addition, ○ indicates that sufficient bonding strength was obtained, and X indicates that bonding strength was insufficient.
Was filled in.
【００３０】[0030]
【表２】 [Table 2]
【００３１】表２の結果より、「条件１」では、比較例
の正極端子の封止部において、十分な接着強度が得られ
なかった。これは、正極端子と負極端子の熱伝導度が大
きく異なるため、正極端子に加えられた熱が過度に電極
方向へ逃げ、正極端子が充分な温度まで上昇しなかった
ためと考えられる。From the results shown in Table 2, under "condition 1", a sufficient bonding strength was not obtained in the sealing portion of the positive electrode terminal of the comparative example. This is considered to be because the heat applied to the positive electrode terminal excessively escaped in the direction of the electrode because the thermal conductivity of the positive electrode terminal and the negative electrode terminal were significantly different, and the temperature of the positive electrode terminal did not rise to a sufficient temperature.
【００３２】一方、「条件２」では、実施例１〜３及び
比較例のいずれにおいても、負極端子と金属樹脂複合フ
ィルムの金属箔層との間に絶縁破壊が確認された。これ
は、負極端子に加えられた熱が蓄積され、その結果、金
属樹脂複合フィルムを構成している融着性樹脂層が負極
端子部分において熱限界に達したため、負極端子封止部
に係る融着性樹脂が過度に溶融し、該部分において負極
端子と金属樹脂複合フィルムを構成している金属箔層と
が電気的に接触するに至ったと考えられる。On the other hand, under "condition 2", dielectric breakdown was confirmed between the negative electrode terminal and the metal foil layer of the metal resin composite film in each of Examples 1 to 3 and Comparative Example. This is because the heat applied to the negative electrode terminal is accumulated, and as a result, the heat-fusible resin layer constituting the metal-resin composite film reaches the thermal limit in the negative electrode terminal portion. It is considered that the adhesive resin was excessively melted, and the negative electrode terminal and the metal foil layer constituting the metal-resin composite film were brought into electrical contact in this portion.
【００３３】本発明電池１〜３では、条件１を用いる
と、両極端子とパッケージとの間に充分な接着強度が得
られ、且つ、温度の過上昇による絶縁破壊の発生を防ぐ
ことができた。In the batteries 1 to 3 of the present invention, when the condition 1 was used, sufficient adhesive strength was obtained between the bipolar terminal and the package, and the occurrence of dielectric breakdown due to an excessive rise in temperature could be prevented. .
【００３４】なお、端子の、封止部と電極との間の断面
積を変える方法については、任意であり、上記に限定さ
れるものではない。例えば、図５（ａ）に示すように、
端子の一部に「くびれ」を有するような切除部を設けて
おく方法、同図（ｂ）に示すようにパンチ穴を設ける方
法、同図（ｃ）に示すようにメッシュ状とする方法等を
選択することができる。このような形状と寸法を選択す
ることにより、誤仕様等により端子に大電流が流れた場
合、端子が熔解切断され、それ以上の電流が流れること
を遮断するといったヒューズ効果を持たせることも可能
である。The method of changing the cross-sectional area of the terminal between the sealing portion and the electrode is arbitrary and is not limited to the above. For example, as shown in FIG.
A method of providing a cut-out portion having a "constriction" in a part of a terminal, a method of providing a punched hole as shown in FIG. 3B, a method of forming a mesh as shown in FIG. Can be selected. By selecting such a shape and dimensions, it is possible to have a fuse effect such that when a large current flows through the terminal due to incorrect specifications etc., the terminal is melted and cut off, preventing more current from flowing It is.
【００３５】[0035]
【発明の効果】以上説明したように、本発明によれば、
熱伝導率が異なる端子を用いていても、簡便な方法によ
り、端子の封止部分の融着温度を近似させることができ
るので、複雑な装置や複雑な操作を必要としなくても融
着封止の不良を低減できるので、封口の信頼性が高くか
つ生産性に優れた密閉型電池を提供することができる。As described above, according to the present invention,
Even if terminals with different thermal conductivities are used, the fusing temperature of the sealed portion of the terminal can be approximated by a simple method, so that fusion sealing is not required without complicated equipment or complicated operation. Since sealing failure can be reduced, a sealed battery having high sealing reliability and excellent productivity can be provided.
【図１】本発明電池の平面透視図である。FIG. 1 is a perspective plan view of a battery of the present invention.
【図２】本発明電池の端子部分の平面透視拡大図であ
る。FIG. 2 is an enlarged perspective plan view of a terminal portion of the battery of the present invention.
【図３】本発明電池の端子部分の平面透視拡大図であ
る。FIG. 3 is an enlarged perspective plan view of a terminal portion of the battery of the present invention.
【図４】本発明電池の斜視図である。FIG. 4 is a perspective view of the battery of the present invention.
【図５】本発明電池の端子部分の平面透視拡大図であ
る。FIG. 5 is an enlarged perspective plan view of a terminal portion of the battery of the present invention.
【図６】比較電池の端子部分の平面透視拡大図である。FIG. 6 is an enlarged perspective plan view of a terminal portion of a comparative battery.
１ 極群 ２ 正極端子 ２Ａ 正極端子封止部 ３ 負極端子 ３Ａ 負極端子封止部 DESCRIPTION OF SYMBOLS 1 Pole group 2 Positive terminal 2A Positive terminal sealing part 3 Negative terminal 3A Negative terminal sealing part
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H011 AA09 AA17 FF04 GG09 HH02 HH13 KK02 5H022 AA09 BB12 CC03 CC08 CC12 KK08 5H029 AJ14 AJ15 BJ04 BJ12 CJ02 CJ05 DJ03 DJ05 HJ04 HJ07 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)
Claims (3)
子が、融着性樹脂による封止部を横断している構造を有
する電池において、前記正極端子と前記負極端子とが熱
伝導率の異なる導電性材料からなり、熱伝導度が高い方
の端子の、前記封止部から前記極群に至る部分の（断面
積／距離）の値が、熱伝導度が低い方の端子の、前記封
止部から前記極群に至る部分の（断面積／距離）の値よ
りも小さいことを特徴とする密閉形電池。1. A battery having a structure in which a positive electrode terminal and a negative electrode terminal connected to an electrode group cross a sealing portion made of a fusible resin, wherein the positive electrode terminal and the negative electrode terminal have thermal conductivity. The value of (cross-sectional area / distance) of a portion of the terminal having the higher thermal conductivity, which is made of a different conductive material, and extending from the sealing portion to the pole group, of the terminal having the lower thermal conductivity, A sealed battery characterized by being smaller than the value of (cross-sectional area / distance) of a portion from a sealing portion to the electrode group.
子が、融着性樹脂による封止部を横断している構造を有
する電池において、前記正極端子と前記負極端子とが熱
伝導率の異なる導電性材料からなり、熱伝導度が高い方
の端子の、前記封止部から前記極群に至る部分の少なく
とも一部を切除した形状を有していることを特徴とする
密閉形電池。2. A battery having a structure in which a positive electrode terminal and a negative electrode terminal connected to an electrode group cross a sealing portion made of a fusible resin, wherein the positive electrode terminal and the negative electrode terminal have thermal conductivity. A sealed battery comprising a terminal made of a different conductive material and having a higher thermal conductivity, wherein at least a part of a portion from the sealing portion to the electrode group is cut off.
子が、融着性樹脂による封止部を横断している構造を有
する電池において、前記正極端子と前記負極端子とが熱
伝導率の異なる導電性材料からなり、熱伝導度が高い方
の端子の、前記封止部から前記極群に至る距離が、熱伝
導度が低い方の端子の、前記封止部から前記極群に至る
距離よりも長いことを特徴とする密閉形電池。3. A battery having a structure in which a positive electrode terminal and a negative electrode terminal connected to an electrode group cross a sealing portion made of a fusible resin, wherein the positive electrode terminal and the negative electrode terminal have thermal conductivity. It is made of a different conductive material, and the distance from the sealing portion of the terminal having higher thermal conductivity to the electrode group is from the sealing portion of the terminal having lower thermal conductivity to the electrode group. A sealed battery characterized by being longer than the distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000161811A JP2001345090A (en) | 2000-05-31 | 2000-05-31 | Sealed battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000161811A JP2001345090A (en) | 2000-05-31 | 2000-05-31 | Sealed battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001345090A true JP2001345090A (en) | 2001-12-14 |
Family
ID=18665780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000161811A Pending JP2001345090A (en) | 2000-05-31 | 2000-05-31 | Sealed battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001345090A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100614359B1 (en) | 2004-10-28 | 2006-08-21 | 삼성에스디아이 주식회사 | Lithium secondary battery |
| JP2007328952A (en) * | 2006-06-06 | 2007-12-20 | Toshiba Corp | Non-aqueous electrolyte battery, battery pack and automobile |
| US7326492B2 (en) | 2002-09-26 | 2008-02-05 | Nissan Motor Co., Ltd. | Laminate sheet, laminate battery and related method |
| JP2010529589A (en) * | 2007-01-25 | 2010-08-26 | エスケー エナジー 株式会社 | Lithium secondary battery |
| JP2011505671A (en) * | 2007-11-30 | 2011-02-24 | エイ １２３ システムズ，インク． | Battery cell design with asymmetric terminals |
| US20110176254A1 (en) * | 2008-10-01 | 2011-07-21 | Taiyo Yuden Co., Ltd. | Electrochemical device |
| KR101555654B1 (en) | 2013-06-13 | 2015-09-25 | 주식회사 엘지화학 | Secondary electric cell with differential lead structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7326492B2 (en) | 2002-09-26 | 2008-02-05 | Nissan Motor Co., Ltd. | Laminate sheet, laminate battery and related method |
| KR100614359B1 (en) | 2004-10-28 | 2006-08-21 | 삼성에스디아이 주식회사 | Lithium secondary battery |
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| JP2011505671A (en) * | 2007-11-30 | 2011-02-24 | エイ １２３ システムズ，インク． | Battery cell design with asymmetric terminals |
| KR101572014B1 (en) * | 2007-11-30 | 2015-11-26 | 에이일이삼 시스템즈 인코포레이티드 | Battery cell design with asymmetrical terminals |
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| US8619409B2 (en) * | 2008-10-01 | 2013-12-31 | Taiyo Yuden Co., Ltd. | Electrochemical device |
| KR101555654B1 (en) | 2013-06-13 | 2015-09-25 | 주식회사 엘지화학 | Secondary electric cell with differential lead structure |
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