JP2002324569A - Sealed cell - Google Patents
Sealed cellInfo
- Publication number
- JP2002324569A JP2002324569A JP2001129399A JP2001129399A JP2002324569A JP 2002324569 A JP2002324569 A JP 2002324569A JP 2001129399 A JP2001129399 A JP 2001129399A JP 2001129399 A JP2001129399 A JP 2001129399A JP 2002324569 A JP2002324569 A JP 2002324569A
- Authority
- JP
- Japan
- Prior art keywords
- negative electrode
- positive electrode
- generating element
- power generating
- electrode terminal
- 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
-
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は密閉形電池に係り、
特にセパレータを介して積層させた正極および負極を巻
回させてから扁平に変形された発電要素を有する密閉形
電池に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed battery,
In particular, the present invention relates to a sealed battery having a power generating element that is flattened after winding a positive electrode and a negative electrode that are stacked via a separator.
【０００２】[0002]
【従来の技術】近年、電子技術の大きな進歩により、携
帯用の電子機器の小型薄型化が進んでおり、それに伴い
高エネルギーで小型薄型の電池が求められ、この要求に
適合するものとして、一例として偏平形の密閉形電池が
普及している。この偏平形の密閉形電池の製造工程は、
図９（Ａ）に示すように正極端子80が接合された正極81
にセパレータ82を重ね合わせるとともに、負極端子83が
接合された負極84にセパレータ82を重ね合わせる。2. Description of the Related Art In recent years, with the great progress of electronic technology, portable electronic devices have been reduced in size and thickness. Accordingly, high-energy, small and thin batteries have been demanded. As a result, flat sealed batteries have become widespread. The manufacturing process of this flat sealed battery is as follows:
As shown in FIG. 9A, a positive electrode 81 to which a positive terminal 80 is joined
The separator 82 is overlapped with the negative electrode 84 to which the negative electrode terminal 83 is joined.
【０００３】次に、図９（Ｂ）に示すように、正極81に
セパレータ82を重ね、このセパレータに負極84を積層
し、この負極84にセパレータ82を積層した状態で矢印の
ように巻き付けることにより、セパレータ82を介して正
極81および負極84を円形状に回巻する。Next, as shown in FIG. 9B, a separator 82 is stacked on the positive electrode 81, a negative electrode 84 is stacked on the separator 82, and the separator 82 is stacked on the negative electrode 84 and wound as shown by an arrow. Accordingly, the positive electrode 81 and the negative electrode 84 are wound in a circular shape via the separator 82.
【０００４】次いで、円形状に回巻したものをプレス成
型で偏平形に潰すことにより、図９（Ｃ）に示す発電要
素85を得る。この発電要素85の正極端子80および負極端
子83を突出させた状態で、発電要素85の偏平形の部分を
金属樹脂複合フィルム（図示せず）で収容封止すること
により、小型薄型の密閉形電池を得る。[0004] Next, the circularly wound product is crushed into a flat shape by press molding to obtain a power generating element 85 shown in FIG. 9 (C). With the positive electrode terminal 80 and the negative electrode terminal 83 of the power generating element 85 protruding, the flat part of the power generating element 85 is housed and sealed with a metal-resin composite film (not shown), so that a small and thin sealed type is obtained. Get batteries.
【０００５】発電要素85の巻芯には正極端子80および負
極端子83が配置されているので、発電要素85を押し潰し
たとき、図９（Ｄ）に示すように発電要素85の外周に正
極端子80および負極端子83の厚さ寸法に相当する突条部
86が形成される。よって、密閉電池の厚さは発電要素85
の突条部86を考慮した厚さ寸法ｔ１に影響を受ける。Since the positive electrode terminal 80 and the negative electrode terminal 83 are arranged on the core of the power generating element 85, when the power generating element 85 is crushed, as shown in FIG. Ridges corresponding to the thickness dimensions of terminal 80 and negative electrode terminal 83
86 is formed. Therefore, the thickness of the sealed battery is
Is affected by the thickness t1 in consideration of the ridge portion 86 of FIG.
【０００６】[0006]
【発明が解決しようとする課題】ところで、発電要素85
を偏平形に押し潰す際に、正極端子80および負極端子83
の近傍に僅かに空隙87が残り、空隙87に発電要素85から
発生したガス（リチウム電池の場合には水素ガスが発生
する）をある程度収容できる。The power generation element 85
When crushing the flat terminal, the positive terminal 80 and the negative terminal 83
A gap 87 is left slightly in the vicinity of, and the gas generated from the power generation element 85 (a hydrogen gas is generated in the case of a lithium battery) can be accommodated in the gap 87 to some extent.
【０００７】しかし、正極端子80および負極端子83の近
傍に残った僅かな空隙87ではガスを十分に収容すること
ができない。このため、発電要素を収容封止する金属樹
脂複合フィルムにガスを収容するための収容部を備える
必要があった。加えて、発電要素を偏平形に押し潰すこ
とにより、正極81および負極84が屈曲部88で屈曲げら
れ、正極81および負極84の表面に塗布した活物質がそれ
ぞれの表面から脱落することが考えられる。However, the small gap 87 remaining near the positive electrode terminal 80 and the negative electrode terminal 83 cannot sufficiently accommodate gas. For this reason, it was necessary to provide an accommodation portion for accommodating gas in the metal-resin composite film for accommodating and sealing the power generation element. In addition, by crushing the power generating element in a flat shape, the positive electrode 81 and the negative electrode 84 are bent at the bent portion 88, and the active material applied to the surfaces of the positive electrode 81 and the negative electrode 84 may fall off from the respective surfaces. Can be
【０００８】本発明は、前述した問題点に鑑みてなされ
たものであり、その目的は、ガスを収容するためのガス
収容部を金属樹脂複合フィルムに備える必要がなく、か
つ正極および負極から活物質が脱落することを防止でき
る密閉形電池を提供することにある。The present invention has been made in view of the above-mentioned problems, and has as its object to eliminate the need to provide a metal resin composite film with a gas accommodating portion for accommodating gas, and to enable the positive and negative electrodes to be activated. An object of the present invention is to provide a sealed battery capable of preventing a substance from falling off.
【０００９】[0009]
【課題を解決するための手段】前述した目的を達成する
ために、本発明は、請求項１に記載したように、セパレ
ータを介して積層された負極および正極と、前記負極お
よび前記正極にそれぞれ接合された負極端子および正極
端子とを有する発電要素を備え、前記負極および前記正
極が屈曲部を境界として折り曲げられた密閉形電池であ
って、前記屈曲部の内側に空隙が設けられていることを
特徴としている。In order to achieve the above-mentioned object, the present invention provides, as described in claim 1, a negative electrode and a positive electrode laminated via a separator, A sealed battery including a power generating element having a joined negative electrode terminal and a positive electrode terminal, wherein the negative electrode and the positive electrode are bent with a bent portion as a boundary, and a gap is provided inside the bent portion. It is characterized by.
【００１０】このように構成された密閉形電池において
は、屈曲部の内側に空隙を設け、この空隙をガス溜りと
して利用することにより、ガス溜りとしての空隙に発生
したガスを収容できる。さらに、屈曲部の内側に空隙を
設けることにより、この空隙で正極端子および負極端子
のそれぞれの厚さ寸法を吸収する。よって、正極端子お
よび負極端子の厚さ寸法に相当する突条部が発電要素の
外周に形成されることを防止できるので、発電要素の厚
さ寸法を従来の発電要素と同じ厚さ寸法に抑えることが
できる。In the thus-configured sealed battery, a space is provided inside the bent portion and the space is used as a gas reservoir, so that the gas generated in the space as the gas reservoir can be accommodated. Further, by providing a gap inside the bent portion, the gap absorbs the thickness of each of the positive electrode terminal and the negative electrode terminal. Therefore, it is possible to prevent a ridge portion corresponding to the thickness dimension of the positive electrode terminal and the negative electrode terminal from being formed on the outer periphery of the power generating element, so that the thickness dimension of the power generating element is suppressed to the same thickness dimension as the conventional power generating element. be able to.
【００１１】また、本発明においては、請求項２に記載
したように、前記屈曲部の最小屈曲直径寸法が前記負極
および前記正極のうちの少なくとも一方における最大厚
さ寸法以上であることを特徴としている。Further, in the present invention, as set forth in claim 2, a minimum bending diameter of the bent portion is not less than a maximum thickness of at least one of the negative electrode and the positive electrode. I have.
【００１２】屈曲部の最小屈曲直径寸法が前記負極およ
び前記正極のうちの少なくとも一方における最大厚さ寸
法以上であるため、正極端子および負極端子の厚さ寸法
を空隙により吸収できるとともに、負極および正極のそ
れぞれの表面に塗布した活物質が、負極および正極の表
面から脱落することを防ぐことができる。Since the minimum bending diameter of the bent portion is equal to or larger than the maximum thickness of at least one of the negative electrode and the positive electrode, the thickness of the positive electrode terminal and the negative electrode terminal can be absorbed by the gap, and the negative electrode and the positive electrode can be absorbed. The active material applied to the respective surfaces can be prevented from falling off the surfaces of the negative electrode and the positive electrode.
【００１３】[0013]
【発明の実施の形態】以下、本発明に係る実施形態を図
面に基づいて詳細に説明する。なお、以下に説明する各
実施形態において、図１において説明した部材等につい
ては、図中に同一符号あるいは相当符号を付すことによ
り説明を簡略化あるいは省略する。Embodiments of the present invention will be described below in detail with reference to the drawings. In each of the embodiments described below, the members and the like described in FIG. 1 are denoted by the same reference numerals or corresponding reference numerals in the drawings to simplify or omit the description.
【００１４】図１および図２に示すように、本発明に係
る第１実施形態である密閉形電池10は、偏平形の発電要
素11を備え、この発電要素11が金属樹脂複合フィルム
（図示せず）で収容封止されている。発電要素11は、セ
パレータ13を介して積層された負極14および正極15と、
負極14および正極15にそれぞれ接合された負極端子16お
よび正極端子17とを有し、負極14および正極15が屈曲部
18を境界として折り曲げられ、屈曲部18の内側に空隙19
が設けられている。As shown in FIGS. 1 and 2, a sealed battery 10 according to a first embodiment of the present invention includes a flat power generating element 11, and the power generating element 11 is formed of a metal-resin composite film (not shown). ) Is sealed. The power generating element 11 includes a negative electrode 14 and a positive electrode 15 stacked with a separator 13 interposed therebetween,
It has a negative electrode terminal 16 and a positive electrode terminal 17 joined to the negative electrode 14 and the positive electrode 15, respectively.
It is bent at the boundary 18 and a gap 19 inside the bent portion 18
Is provided.
【００１５】ここで、負極端子16および正極端子17は、
最大厚さ寸法が0.3mm以下とされ、負極を構成する集電
体の厚さ寸法が15μｍ〜25μｍ、正極を構成する集電体
の厚さ寸法が10μｍ〜15μｍとされている。また、屈曲
部18は、負極端子16および正極端子17の厚さ寸法に対応
して、最小屈曲直径寸法Ｄが0.3mm〜0.35mmに設定され
ている。Here, the negative terminal 16 and the positive terminal 17 are
The maximum thickness is 0.3 mm or less, the thickness of the current collector forming the negative electrode is 15 μm to 25 μm, and the thickness of the current collector forming the positive electrode is 10 μm to 15 μm. In addition, the bending portion 18 has a minimum bending diameter D of 0.3 mm to 0.35 mm corresponding to the thickness of the negative electrode terminal 16 and the positive electrode terminal 17.
【００１６】屈曲部18の最小屈曲直径寸法Ｄが0.3mm未
満であると、空隙19が所望の容積を得られないととも
に、負極14および正極15を構成する活物質が集電体から
脱落する虞れがあるので、それを防ぐために最小屈曲直
径寸法Ｄを0.3mm以上に設定した。また、屈曲部18の最
小屈曲直径寸法Ｄが0.35mmを超えると、空隙19が余剰と
なるので、それを防ぐために最小屈曲直径寸法Ｄを0.35
mm以下に設定した。If the minimum bending diameter D of the bending portion 18 is less than 0.3 mm, the void 19 cannot obtain a desired volume, and the active materials constituting the negative electrode 14 and the positive electrode 15 may fall off the current collector. To prevent this, the minimum bending diameter D was set to 0.3 mm or more. If the minimum bending diameter D of the bending portion 18 exceeds 0.35 mm, the gap 19 becomes excessive.
mm or less.
【００１７】このような空隙19が余剰となる問題は、大
型の密閉形電池において特に顕著となる。従って、この
ような構成は、大型の密閉形電池において特に効果的で
ある。The problem that the void 19 becomes excessive becomes particularly remarkable in a large sealed battery. Therefore, such a configuration is particularly effective in a large sealed battery.
【００１８】屈曲部18の最小屈曲直径寸法Ｄが0.3mm〜
0.35mmとすることで、空隙19の幅寸法Ｗを負極端子15お
よび正極端子16のそれぞれの厚さ寸法より大きく、また
はそれぞれの厚さ寸法と同等にできる。よって、負極端
子15および正極端子16の厚さ寸法を空隙19で吸収できる
ので、従来技術のように負極端子15および正極端子16の
厚さに相当する突条部が発電要素11の外周に形成される
ことが防止できる。このため、発電要素11に空隙19を備
えても、発電要素11の厚さ寸法ｔ２を、従来技術で説明
した発電要素85の厚さ寸法ｔ１とほぼ同一に抑えること
ができる。The minimum bending diameter D of the bending portion 18 is 0.3 mm or more.
By setting it to 0.35 mm, the width dimension W of the gap 19 can be larger than or equal to the respective thickness dimensions of the negative electrode terminal 15 and the positive electrode terminal 16. Therefore, the thickness of the negative electrode terminal 15 and the positive electrode terminal 16 can be absorbed by the gap 19, so that a ridge corresponding to the thickness of the negative electrode terminal 15 and the positive electrode terminal 16 is formed on the outer periphery of the power generation element 11 as in the related art. Can be prevented. Therefore, even if the power generating element 11 is provided with the gap 19, the thickness t2 of the power generating element 11 can be suppressed to be substantially the same as the thickness t1 of the power generating element 85 described in the related art.
【００１９】加えて、屈曲部18の最小屈曲直径寸法Ｄが
0.3mm〜0.35mmとすることで、負極14および正極15のそ
れぞれの表面に塗布した活物質が、負極14および正極15
の表面から脱落することを防ぐことができる。In addition, the minimum bending diameter D of the bending portion 18 is
By setting the thickness to 0.3 mm to 0.35 mm, the active material applied to the respective surfaces of the negative electrode 14 and the positive electrode 15
Can be prevented from dropping off the surface of the device.
【００２０】従って、第１実施形態によれば、屈曲部18
の内側に空隙19を設け、この空隙19をガス溜りとして利
用することにより、ガス溜りとしての空隙19に発生した
ガスを十分に収容できる。このため、ガスを収容するた
めのガス収容部を金属樹脂複合フィルムに備える必要は
ない。Therefore, according to the first embodiment, the bent portion 18
By providing a space 19 inside the space and using the space 19 as a gas reservoir, the gas generated in the space 19 serving as the gas reservoir can be sufficiently accommodated. Therefore, it is not necessary to provide the metal resin composite film with a gas storage part for storing gas.
【００２１】さらに、屈曲部18の内側に空隙19を設ける
ことにより、この空隙19で負極端子16および正極端子17
のそれぞれの厚さにより吸収できる。よって、発電要素
11に空隙19を備えても、発電要素11の厚さ寸法ｔ２を、
従来技術で説明した発電要素85の厚さｔ１寸法とほぼ同
一に抑えることができる。このため、密閉形電池10の容
積効率が悪化することを防止できる。Further, by providing a gap 19 inside the bent portion 18, the gap 19 allows the negative electrode terminal 16 and the positive electrode terminal 17 to be formed.
Can be absorbed by the respective thicknesses. Therefore, the power generation element
Even if the air gap 19 is provided in the 11, the thickness dimension t2 of the power generation element 11 is
The thickness t1 of the power generating element 85 described in the related art can be suppressed to substantially the same dimension. For this reason, it is possible to prevent the volume efficiency of the sealed battery 10 from deteriorating.
【００２２】次に、第２実施形態について図３〜図６に
基づいて説明する。図３に示すように、本発明に係る第
２実施形態である密閉形電池30は、偏平形の発電要素31
を備え、この発電要素31が金属樹脂複合フィルム32で矢
印のように包込み、図４に示すように金属樹脂複合フィ
ルム32の両側部32A，32Bを重ね合わせて接合し、接合部
33を凹み35に収めたものである（図６参照）。なお、図
４の密閉形電池30は、金属樹脂複合フィルム32の両端が
封止されていない状態を示す。Next, a second embodiment will be described with reference to FIGS. As shown in FIG. 3, a sealed battery 30 according to a second embodiment of the present invention includes a flat power generating element 31.
The power generation element 31 is wrapped in a metal-resin composite film 32 as shown by an arrow, and both sides 32A and 32B of the metal-resin composite film 32 are overlapped and joined as shown in FIG.
33 is housed in a recess 35 (see FIG. 6). The sealed battery 30 shown in FIG. 4 shows a state in which both ends of the metal-resin composite film 32 are not sealed.
【００２３】発電要素31は、第１実施形態と同様にセパ
レータ12を介して積層された負極13および正極14と、負
極13および正極14にそれぞれ接合された負極端子16およ
び正極端子17とを有し、図３に示すように負極14および
正極15が屈曲部38を境界として折り曲げられ、屈曲部38
の内側に空隙39が設けられている。この屈曲部38は、第
１実施形態の屈曲部18と同じ最小屈曲直径寸法Ｄで折り
曲げたものである。The power generating element 31 has a negative electrode 13 and a positive electrode 14 laminated with a separator 12 therebetween as in the first embodiment, and a negative electrode terminal 16 and a positive electrode terminal 17 joined to the negative electrode 13 and the positive electrode 14, respectively. Then, as shown in FIG. 3, the negative electrode 14 and the positive electrode 15 are bent with the bent portion 38 as a boundary, and the bent portion 38
Is provided with a space 39 inside. The bent portion 38 is bent at the same minimum bent diameter D as the bent portion 18 of the first embodiment.
【００２４】この発電要素31は、図５に示すようにプレ
ス成型用の金型40で、固定型41の成型面に凸部42が備え
られるとともに、可動型43の成型面に凸部44が備えられ
ている。よって、金型40で発電要素31を偏平形に潰すこ
とで、発電要素31の長軸に沿った外周に凹み31Aが形成
される。As shown in FIG. 5, the power generating element 31 is a press-molding die 40 having a convex portion 42 on a molding surface of a fixed die 41 and a convex portion 44 on a molding surface of a movable die 43. Provided. Therefore, when the power generating element 31 is crushed into a flat shape by the mold 40, a recess 31A is formed on the outer periphery along the long axis of the power generating element 31.
【００２５】発電要素31の長軸に沿った外周に凹み31A
が形成されているので、図６に示すように発電要素31を
金属樹脂複合フィルム32で収容封止した際に、密閉形電
池30の凹み35を形成できる。よって、密閉形電池30の凹
み35の厚さ寸法ｔ３を密閉形電池30の最大厚さ寸法ｔ４
より小さく抑えることができる。これにより、金属樹脂
複合フィルム32の両側部32A，32Bを接合した接合部33を
密閉形電池30の凹み35に収めて、密閉形電池30の最大厚
さ寸法をｔ４に抑えることができるので、密閉形電池30
の薄型化を図ることができる。A recess 31A is formed on the outer periphery along the long axis of the power generating element 31.
The recess 35 of the sealed battery 30 can be formed when the power generating element 31 is housed and sealed with the metal-resin composite film 32 as shown in FIG. Therefore, the thickness t3 of the recess 35 of the sealed battery 30 is changed to the maximum thickness t4 of the sealed battery 30.
It can be kept smaller. As a result, the joint portion 33 joining the both sides 32A and 32B of the metal-resin composite film 32 is accommodated in the recess 35 of the sealed battery 30, and the maximum thickness dimension of the sealed battery 30 can be suppressed to t4. Sealed battery 30
Can be made thinner.
【００２６】また、第２実施形態の密閉形電池30によれ
ば、屈曲部38を第１実施形態の屈曲部18と同じ最小屈曲
直径寸法Ｄで折り曲げ、かつ屈曲部38の内側に空隙39が
設けられることにより、第１実施形態と同様の効果を得
ることができる。Further, according to the sealed battery 30 of the second embodiment, the bent portion 38 is bent at the same minimum bent diameter D as the bent portion 18 of the first embodiment, and a space 39 is formed inside the bent portion 38. With the provision, the same effect as in the first embodiment can be obtained.
【００２７】次に、第３実施形態について図７に基づい
て説明する。図７に示すように、本発明に係る第３実施
形態である密閉形電池50は、偏平形の発電要素11を備
え、この発電要素11が金属樹脂複合フィルム51の収容凹
部52に収容され、蓋部53を屈曲部54で屈曲げることで、
発電要素11が金属樹脂複合フィルム51で収容封止され
る。この密閉形電池50においても、第１実施形態と同様
の効果を得ることができる。Next, a third embodiment will be described with reference to FIG. As shown in FIG. 7, a sealed battery 50 according to a third embodiment of the present invention includes a flat power generating element 11, which is housed in a housing recess 52 of a metal-resin composite film 51, By bending the lid 53 at the bending portion 54,
The power generation element 11 is housed and sealed by the metal-resin composite film 51. In this sealed battery 50, the same effect as in the first embodiment can be obtained.
【００２８】次に、第４実施形態について図８に基づい
て説明する。図８に示すように、本発明に係る第４実施
形態である発電要素61は、セパレータ63を介して積層さ
れた負極64および正極65の積層体を中央から折り畳むこ
とにより形成したもので、負極64および正極65にそれぞ
れ接合された負極端子66および正極端子67とを有する。
この発電要素61は、負極64および正極65が屈曲部68を境
界として折り曲げられ、屈曲部68の内側に空隙69が設け
られている。この発電要素61においても、第１、第２実
施形態と同様の効果を得ることができる。Next, a fourth embodiment will be described with reference to FIG. As shown in FIG. 8, a power generating element 61 according to a fourth embodiment of the present invention is formed by folding a laminate of a negative electrode 64 and a positive electrode 65 stacked via a separator 63 from the center. It has a negative electrode terminal 66 and a positive electrode terminal 67 joined to the positive electrode 64 and the positive electrode 65, respectively.
In the power generating element 61, the negative electrode 64 and the positive electrode 65 are bent with the bent portion 68 as a boundary, and a gap 69 is provided inside the bent portion 68. In this power generation element 61, the same effect as in the first and second embodiments can be obtained.
【００２９】なお、本発明は、前述した各実施形態に限
定されるものでなく、適宜な変形，改良等が可能であ
り、前述した各実施形態において例示した発電要素，金
属樹脂複合フィルム，正極，負極，正極端子，負極端子
等の材質，形状，寸法，形態，数，配置個所，厚さ寸法
等は本発明を達成できるものであれば任意であり、限定
されない。The present invention is not limited to the above-described embodiments, but can be appropriately modified and improved. The power generating element, the metal-resin composite film, the positive electrode and the positive electrode illustrated in the above-described embodiments can be used. The material, shape, dimensions, form, number, location, thickness, etc. of the electrode, the negative electrode, the positive electrode terminal, the negative electrode terminal and the like are arbitrary and not limited as long as the present invention can be achieved.
【００３０】[0030]
【発明の効果】以上、説明したように、本発明によれ
ば、請求項１に記載したように、屈曲部の内側に空隙を
設け、この空隙をガス溜りとして利用することにより、
ガス溜りとしての空隙に発生したガスを十分に収容でき
る。このため、ガスを収容するためのガス収容部を金属
樹脂複合フィルムに備える必要はない。As described above, according to the present invention, as described in claim 1, a gap is provided inside the bent portion, and the gap is used as a gas reservoir.
The gas generated in the void as a gas reservoir can be sufficiently accommodated. For this reason, it is not necessary to provide a gas storage portion for storing gas in the metal-resin composite film.
【００３１】さらに、屈曲部の内側に空隙を設けること
により、この空隙で正極端子および負極端子のそれぞれ
の厚さを吸収する。よって、正極端子および負極端子の
厚さ寸法に相当する突条部が発電要素の外周に形成され
ることを防止できる。このため、発電要素の厚さを従来
の発電要素と同じ厚さに抑えて容積効率が悪化すること
を防止できる。Further, by providing a gap inside the bent portion, the gap absorbs the thickness of each of the positive electrode terminal and the negative electrode terminal. Therefore, it is possible to prevent a ridge portion corresponding to the thickness dimension of the positive electrode terminal and the negative electrode terminal from being formed on the outer periphery of the power generating element. For this reason, the thickness of the power generating element can be suppressed to the same thickness as that of the conventional power generating element, thereby preventing the volumetric efficiency from being deteriorated.
【００３２】また、本発明によれば、請求項２に記載し
たように、前記屈曲部の最小屈曲直径寸法が前記負極お
よび前記正極のうちの少なくとも一方における最大厚さ
寸法以上であるため、正極端子および負極端子の厚さ寸
法を空隙で吸収でき、正極端子および負極端子の厚さ寸
法に相当する突条部が発電要素の外周に形成されること
を防止できる。According to the present invention, as described in claim 2, the minimum bending diameter of the bent portion is equal to or greater than the maximum thickness of at least one of the negative electrode and the positive electrode. The thickness of the terminal and the negative electrode terminal can be absorbed by the gap, and it is possible to prevent a ridge corresponding to the thickness of the positive electrode terminal and the negative electrode terminal from being formed on the outer periphery of the power generating element.
【図１】本発明に係る第１実施形態の発電要素を示す斜
視図である。FIG. 1 is a perspective view showing a power generating element according to a first embodiment of the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】本発明に係る第２実施形態の発電要素を示す斜
視図である。FIG. 3 is a perspective view showing a power generating element according to a second embodiment of the present invention.
【図４】本発明に係る第２実施形態の斜視図である。FIG. 4 is a perspective view of a second embodiment according to the present invention.
【図５】本発明に係る第２実施形態を製造する方法を示
す説明図である。FIG. 5 is an explanatory view showing a method for manufacturing a second embodiment according to the present invention.
【図６】図５のＢ−Ｂ線断面図である。FIG. 6 is a sectional view taken along line BB of FIG. 5;
【図７】本発明に係る第３実施形態の斜視図である。FIG. 7 is a perspective view of a third embodiment according to the present invention.
【図８】本発明に係る第４実施形態の斜視図である。FIG. 8 is a perspective view of a fourth embodiment according to the present invention.
【図９】従来の密閉形電池の製造方法を説明した図であ
る。FIG. 9 is a view illustrating a conventional method of manufacturing a sealed battery.
10，30，50 密閉形電池 11，31，61 発電要素 13 セパレータ 14 負極 15 正極 16 負極端子 17 正極端子 18，38，68 屈曲部 19，39，69 空隙 10, 30, 50 Sealed battery 11, 31, 61 Power generation element 13 Separator 14 Negative electrode 15 Positive electrode 16 Negative terminal 17 Positive terminal 18, 38, 68 Bent portion 19, 39, 69 Void
Claims (2)
び正極と、前記負極および前記正極にそれぞれ接合され
た負極端子および正極端子とを有する発電要素を備え、
前記負極および前記正極が屈曲部を境界として折り曲げ
られた密閉形電池であって、 前記屈曲部の内側に空隙が設けられていることを特徴と
する密閉形電池。1. A power generating element having a negative electrode and a positive electrode laminated via a separator, and a negative electrode terminal and a positive electrode terminal respectively joined to the negative electrode and the positive electrode,
A sealed battery in which the negative electrode and the positive electrode are bent at a bent portion as a boundary, wherein a void is provided inside the bent portion.
極および前記正極のうちの少なくとも一方における最大
厚さ寸法以上であることを特徴とする請求項１に記載し
た密閉形電池。2. The sealed battery according to claim 1, wherein a minimum bending diameter of the bent portion is equal to or larger than a maximum thickness of at least one of the negative electrode and the positive electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001129399A JP2002324569A (en) | 2001-04-26 | 2001-04-26 | Sealed cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001129399A JP2002324569A (en) | 2001-04-26 | 2001-04-26 | Sealed cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002324569A true JP2002324569A (en) | 2002-11-08 |
Family
ID=18977929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001129399A Pending JP2002324569A (en) | 2001-04-26 | 2001-04-26 | Sealed cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002324569A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005032671A (en) * | 2003-07-11 | 2005-02-03 | Hitachi Maxell Ltd | Coin-form nonaqueous secondary battery |
| US8021781B2 (en) | 2003-05-26 | 2011-09-20 | Samsung Sdi Co., Ltd. | Jelly-roll type electrode assembly and secondary battery employing the same |
-
2001
- 2001-04-26 JP JP2001129399A patent/JP2002324569A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8021781B2 (en) | 2003-05-26 | 2011-09-20 | Samsung Sdi Co., Ltd. | Jelly-roll type electrode assembly and secondary battery employing the same |
| JP2005032671A (en) * | 2003-07-11 | 2005-02-03 | Hitachi Maxell Ltd | Coin-form nonaqueous secondary battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100884945B1 (en) | Pouch-typed Secondary Battery | |
| JP5252937B2 (en) | Stacked battery and method for manufacturing the same | |
| JP5451315B2 (en) | Assembled battery | |
| JP6743664B2 (en) | Power storage device and method of manufacturing power storage device | |
| JP2013541173A (en) | Rechargeable battery with multiple thickness jelly rolls | |
| JP2006049054A (en) | Sheet material battery, battery pack assembled with sheet material batteries, and manufacturing method of sheet material battery | |
| JP2010097891A (en) | Stacked lithium-ion secondary battery | |
| JP2000223109A5 (en) | ||
| JP2010033922A (en) | Layered secondary battery | |
| JP2000200584A (en) | Rectangular battery | |
| JP2008243411A (en) | Sealed secondary battery | |
| JP2002319375A (en) | Sealed battery | |
| JP2006164784A (en) | Film-armored electric device | |
| KR100858807B1 (en) | Pouched-type case and lithium secondary battery applying the same | |
| JP2005228573A (en) | Closed type battery | |
| JP4172328B2 (en) | Battery and battery pack | |
| JP4592297B2 (en) | Sealed battery | |
| JP2002324569A (en) | Sealed cell | |
| JP2004022339A (en) | Battery | |
| JP2001313062A (en) | Film package type cell | |
| JP2009170379A (en) | Stacked sealed battery | |
| JP2002117900A (en) | Coin form battery | |
| JPH10284111A (en) | Manufacture of battery | |
| JP2010251085A (en) | Laminated secondary battery | |
| JP2010114365A (en) | Electric double layer capacitor and method of manufacturing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A712 Effective date: 20051219 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060125 |