JPH08180848A - Battery sealing body and secondary battery using it - Google Patents
Battery sealing body and secondary battery using itInfo
- Publication number
- JPH08180848A JPH08180848A JP6318819A JP31881994A JPH08180848A JP H08180848 A JPH08180848 A JP H08180848A JP 6318819 A JP6318819 A JP 6318819A JP 31881994 A JP31881994 A JP 31881994A JP H08180848 A JPH08180848 A JP H08180848A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- sealing body
- positive electrode
- pressure
- plate
- 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 title claims abstract description 25
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 9
- 229920005672 polyolefin resin Polymers 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000009172 bursting Effects 0.000 abstract 4
- 230000000630 rising effect Effects 0.000 abstract 2
- -1 polypropylene Polymers 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 2
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance 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
- Secondary Cells (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、円筒型電池缶の封口体
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing body for a cylindrical battery can.
【０００２】[0002]
【従来の技術】近年、ビデオカメラやノート型パソコン
などの携帯機器の普及に伴い、小型高容量の電池に対す
る需要が高まっている。この内、二次電池の場合は、ほ
とんどがアルカリ電解液を用いたニッケル−カドミウム
電池であるが、電池電圧が約１．２Ｖと低く、エネルギ
ー密度の向上は困難である。近年、負極極材にリチウム
イオンのドーピング、脱ドーピングが可能な各種炭素質
材料を用いたリチウムイオン二次電池が提案されてお
り、開発が活発に行われている。2. Description of the Related Art In recent years, with the widespread use of portable devices such as video cameras and notebook computers, the demand for compact and high capacity batteries has increased. Of these, most of the secondary batteries are nickel-cadmium batteries using an alkaline electrolyte, but the battery voltage is low at about 1.2 V, and it is difficult to improve the energy density. In recent years, a lithium ion secondary battery using various carbonaceous materials capable of doping and dedoping lithium ions as a negative electrode material has been proposed and actively developed.
【０００３】しかしながら、二次電池においては、短絡
や、加熱、その他何等かの理由で電池内圧が上がり、破
裂する危険がある。破裂を回避するため円筒型二次電池
の電池缶封口体には、種々の安全弁が設けられ、例え
ば、絶縁パッキン、正極キャップ、破裂板、絶縁板、お
よび放圧板からなる封口体が知られている。しかしなが
ら、かかる封口体は、部品点数が多い、また組み立て工
程が多いなど量産を勘案すると障害があった。However, in the secondary battery, there is a risk that the internal pressure of the battery rises and explodes due to a short circuit, heating, or some other reason. Various safety valves are provided on the battery can sealing body of the cylindrical secondary battery in order to avoid a rupture, for example, a sealing body composed of an insulating packing, a positive electrode cap, a rupture plate, an insulating plate, and a pressure release plate is known. There is. However, such a sealing body has a problem when mass production is taken into consideration due to the large number of parts and the large number of assembly steps.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記従来の
技術を解決せんとするものであり、部品点数が少なく、
かつ組立てが容易な電池用封口体およびそれを用いた二
次電池を提供せんとするものである。DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned conventional techniques and has a small number of parts.
The present invention also provides a battery sealing body which is easy to assemble and a secondary battery using the same.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するために以下の構成を有するものである。すなわち
「(1) 絶縁パッキン、正極キャップ、破裂板および放圧
板を用いた円筒型電池缶の封口体において、該放圧板
が、プラスチック製であることを特徴とする電池用封口
体。The present invention has the following constitution in order to solve the above problems. That is, “(1) A sealing body for a cylindrical battery can using an insulating packing, a positive electrode cap, a rupture plate and a pressure release plate, wherein the pressure release plate is made of plastic.
【０００６】(2) 上記１項記載の電池用封口体を用いた
二次電池。」を提供するものである。(2) A secondary battery using the battery sealing body according to the above item 1. Is provided.
【０００７】本発明の封口体は、円筒型電池缶の封口体
において、該封口体が絶縁パッキン、正極キャップ、破
裂板、放圧板を必須の構成要素としてなる。すなわち、
該放圧板はプラスチック製であることから、従来用いて
いた絶縁板を用いることなく、絶縁性を保持することが
でき、よって、部品点数を削減することができたのであ
る。The sealing body of the present invention is a sealing body for a cylindrical battery can, and the sealing body is an essential component of an insulating packing, a positive electrode cap, a rupture plate, and a pressure release plate. That is,
Since the pressure-release plate is made of plastic, the insulating property can be maintained without using the conventionally used insulating plate, and the number of parts can be reduced.
【０００８】本発明を円筒型リチウムイオン二次電池に
適用した場合の一実施態様について、図面を用いて詳細
に説明する。図１は本発明の封口体の概略摸式図であ
る。An embodiment in which the present invention is applied to a cylindrical lithium ion secondary battery will be described in detail with reference to the drawings. FIG. 1 is a schematic model view of a sealing body of the present invention.
【０００９】図１において１は電池外装缶、２は絶縁パ
ッキン、３は正極キャップ、４は破裂板、５はプラスチ
ック製の放圧板、６は正極リードである。In FIG. 1, 1 is a battery outer can, 2 is an insulating packing, 3 is a positive electrode cap, 4 is a rupture plate, 5 is a plastic pressure-release plate, and 6 is a positive electrode lead.
【００１０】電池外装缶１は、例えば炭素繊維と集電体
とから成るシート状の負極、例えばコバルト酸リチウム
をコーティングした正極をセパレータを介してロール状
に巻込んだ構造の電池用電極体を収納する。電池用電極
体としては、これらに限定されることなく、従来公知の
電極などが好ましく用いられる。２はプラスチック製の
絶縁パッキンであり正極と負極の絶縁および電池缶内部
の封止機能を有する。３は金属製の正極キャップ、４は
例えば図２に示すような構造の破裂板であり、一部はプ
レスあるいはエッチング等で肉厚を薄くした構造になっ
ており（図中７が肉厚を薄くした部分を示す）、中央部
に下向きの突起（図中８）を有しているものが好ましく
用いられる。５はプラスチック製の放圧板であり、図３
に示すように該放圧板には放圧のための開口部９と破裂
板４と正極リード６とを接続するための開口部１０が設
けられている。プラスチック製放圧板は種々の形態、構
造が可能であり、他の一例として図４に示すような構造
のものも挙げられる。プラスチック製放圧板に用いるプ
ラスチック材料は特に限定するものではないが、電気的
特性、機械的特性に優れ、耐溶剤性に優れたものである
ことが望ましい。具体的にはポリプロピレン、ポリエチ
レン、ポリエチレンテレフタレート、ポリブチレン等の
ポリオレフィン系樹脂、ナイロン６、ナイロン６６等の
ポリアミド樹脂、テフロン等の弗素系樹脂、ポリフェニ
レンスルフィド、ポリイミドなどが使用できる。The battery outer can 1 is a battery electrode body having a structure in which a sheet-shaped negative electrode made of, for example, carbon fibers and a current collector, for example, a positive electrode coated with lithium cobalt oxide is wound in a roll shape via a separator. Store. The battery electrode body is not limited to these, and conventionally known electrodes and the like are preferably used. 2 is an insulating packing made of plastic, which has a function of insulating the positive and negative electrodes and a function of sealing the inside of the battery can. Reference numeral 3 is a metal positive electrode cap, and 4 is a rupture plate having a structure as shown in FIG. 2, for example, and part of the structure has a structure in which the wall thickness is reduced by pressing or etching (7 in the drawing indicates the wall thickness). Those having downward projections (8 in the figure) in the center are preferably used. Reference numeral 5 is a plastic pressure-release plate.
As shown in FIG. 3, the pressure release plate is provided with an opening 9 for releasing pressure and an opening 10 for connecting the rupture plate 4 and the positive electrode lead 6. The plastic pressure-releasing plate can have various forms and structures, and as another example, the structure shown in FIG. 4 can be given. The plastic material used for the plastic pressure-releasing plate is not particularly limited, but it is desirable that it be excellent in electrical characteristics and mechanical characteristics and excellent in solvent resistance. Specifically, polypropylene resins such as polypropylene, polyethylene, polyethylene terephthalate and polybutylene, polyamide resins such as nylon 6 and nylon 66, fluorine resins such as Teflon, polyphenylene sulfide and polyimide can be used.
【００１１】上記構成の本発明の封口体によれば、特に
５のプラスチック製の放圧板に、過大圧力上昇時に破
裂板４と正極リード６が分離したときの絶縁の機能、
圧力上昇時の放圧、破裂板４の支持体の３つの機能を
持たせる事によって部品点数を少なくできたものであ
る。またプラスチックの成型加工で作製することができ
るため安価である。According to the sealing member of the present invention having the above-mentioned structure, the function of insulating the rupture plate 4 and the positive electrode lead 6 when the rupture plate 4 and the positive electrode lead 6 are separated when the excessive pressure rises is provided on the plastic pressure-release plate 5.
The number of parts can be reduced by providing the three functions of the pressure release when the pressure rises and the support of the rupture plate 4. Further, it is inexpensive because it can be produced by molding plastic.
【００１２】上記実施例は円筒型リチウムイオン二次電
池に使用した例であるが、他の円筒型電池にも適用可能
である。Although the above-mentioned embodiment is an example used for a cylindrical lithium ion secondary battery, it can be applied to other cylindrical batteries.
【００１３】[0013]
実施例１ 粉砕した炭素繊維（東レ（株）製：ＭＬＤ−３０）と結
着剤としてポリフッ化ビニリデン、溶媒としてＮ−メチ
ルピロリドンを用いたスラリーを集電体銅箔にコーティ
ングし作製したシート状の負極と、市販のコバルト酸リ
チウム（日本化学工業（株）製）と結着剤としてポリフ
ッ化ビニリデン、溶媒としてＮ−メチルピロリドンとを
用いたスラリーを集電体アルミ箔にコーティングし作製
したシート状の正極とを、ポリエチレン製セパレータを
介してロール状に巻込んだ構造の電池用電極体を、ニッ
ケルメッキを施した鉄製の円筒型電池外装缶に収納し
た。ポリプロピレンからなる絶縁パッキンを用い、ま
た、アルミニウム製の正極キャップを用いた。さらに図
２に示す構造を有するアミルニウム製の破裂板、図３に
示す構造を有するテフロンからなる放圧板、アルミニウ
ムからなる正極リードとを用いて、図１に示す構造の封
口体を有する電池を作製した。Example 1 A sheet shape prepared by coating a current collector copper foil with a slurry using crushed carbon fiber (MLD-30 manufactured by Toray Industries, Inc.), polyvinylidene fluoride as a binder, and N-methylpyrrolidone as a solvent. A sheet prepared by coating a current collector aluminum foil with a slurry using the negative electrode of No. 1, commercially available lithium cobalt oxide (manufactured by Nippon Chemical Industry Co., Ltd.), polyvinylidene fluoride as a binder, and N-methylpyrrolidone as a solvent. The battery-shaped electrode body having a structure in which a sheet-shaped positive electrode was wound in a roll shape via a polyethylene separator was housed in a nickel-plated iron cylindrical battery outer can. An insulating packing made of polypropylene was used, and a positive electrode cap made of aluminum was used. Further, using a rupture plate made of amylnium having the structure shown in FIG. 2, a pressure-release plate made of Teflon having the structure shown in FIG. 3, and a positive electrode lead made of aluminum, a battery having a sealing body having the structure shown in FIG. 1 was produced. did.
【００１４】[0014]
【発明の効果】本発明のプラスチック製の放圧板を用い
た封口体とすることにより、部品点数を少なくできる。
また封口体の組立てが容易である。The number of parts can be reduced by using the sealing body using the plastic pressure release plate of the present invention.
In addition, the assembly of the sealing body is easy.
【図１】本発明の電池用封口体の構造を示す概略摸式図
である。FIG. 1 is a schematic diagram showing a structure of a battery sealing body of the present invention.
【図２】電池用封口体破裂板の構造を示す概略摸式図で
ある。FIG. 2 is a schematic diagram showing a structure of a rupturable plate for a battery sealing body.
【図３】プラスチック製放圧板の構造を示す概略摸式図
である。FIG. 3 is a schematic diagram showing the structure of a plastic pressure-release plate.
【図４】電池用封口体の構造を示す概略摸式図である。FIG. 4 is a schematic diagram showing the structure of a battery sealing body.
１・・・・・電池外装缶 ２・・・・・絶縁パッキン ３・・・・・正極キャップ ４・・・・・破裂板 ５・・・・・放圧板 ６・・・・・正極リード 1-Battery outer can 2 Insulation packing 3 Positive electrode cap 4 Burst plate 5 Pressure release plate 6 Positive electrode lead
Claims (3)
び放圧板を用いた円筒型電池缶の封口体において、該放
圧板が、プラスチック製であることを特徴とする電池用
封口体。1. A sealing body for a cylindrical battery can using an insulating packing, a positive electrode cap, a rupture plate and a pressure release plate, wherein the pressure release plate is made of plastic.
ることを特徴とする請求項１記載の電池用封口体。2. The battery sealing body according to claim 1, wherein the pressure release plate is made of a polyolefin resin.
電池。3. A secondary battery using the battery sealing body according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6318819A JPH08180848A (en) | 1994-12-21 | 1994-12-21 | Battery sealing body and secondary battery using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6318819A JPH08180848A (en) | 1994-12-21 | 1994-12-21 | Battery sealing body and secondary battery using it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08180848A true JPH08180848A (en) | 1996-07-12 |
Family
ID=18103308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6318819A Pending JPH08180848A (en) | 1994-12-21 | 1994-12-21 | Battery sealing body and secondary battery using it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08180848A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5524871A (en) * | 1993-11-12 | 1996-06-11 | Fichtel & Sachs Ag | Method of making a shock absorber and a shock absorber made by the method |
| WO1999036975A1 (en) * | 1998-01-16 | 1999-07-22 | Toyo Kohan Co., Ltd. | Enclosed cell and sealer |
| CN101820049A (en) * | 2010-04-16 | 2010-09-01 | 广州市云通磁电有限公司 | Method for manufacturing supporting body special for coiled cylindrical battery |
-
1994
- 1994-12-21 JP JP6318819A patent/JPH08180848A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5524871A (en) * | 1993-11-12 | 1996-06-11 | Fichtel & Sachs Ag | Method of making a shock absorber and a shock absorber made by the method |
| WO1999036975A1 (en) * | 1998-01-16 | 1999-07-22 | Toyo Kohan Co., Ltd. | Enclosed cell and sealer |
| US6531242B1 (en) | 1998-01-16 | 2003-03-11 | Toyo Kohan, Ltd. | Enclosed cell and sealer |
| KR100602504B1 (en) * | 1998-01-16 | 2006-07-19 | 도요 고한 가부시키가이샤 | Sealed Batteries and Seals |
| CN101820049A (en) * | 2010-04-16 | 2010-09-01 | 广州市云通磁电有限公司 | Method for manufacturing supporting body special for coiled cylindrical battery |
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