JP2000200587A - Battery and its manufacture - Google Patents
Battery and its manufactureInfo
- Publication number
- JP2000200587A JP2000200587A JP11000133A JP13399A JP2000200587A JP 2000200587 A JP2000200587 A JP 2000200587A JP 11000133 A JP11000133 A JP 11000133A JP 13399 A JP13399 A JP 13399A JP 2000200587 A JP2000200587 A JP 2000200587A
- Authority
- JP
- Japan
- Prior art keywords
- bag
- battery
- sealing
- battery body
- sealed
- 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
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、携帯用電子機器
などに搭載する軽量小型の電池に関し、特に電池体部分
を封入袋に入れて封口する構造の電池に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light and small battery mounted on a portable electronic device and the like, and more particularly to a battery having a structure in which a battery body is sealed in a sealed bag.
【０００２】[0002]
【従来の技術】電池はさまざまな装置の主電源やバック
アップ電源として用いられており、特に近年では携帯用
電子機器の発達に伴い、リチウムイオン二次電池などの
高特性の二次電池が注目を集めている。2. Description of the Related Art Batteries are used as a main power source and a backup power source for various devices. In particular, with the development of portable electronic devices in recent years, secondary batteries of high characteristics such as lithium ion secondary batteries have attracted attention. I am collecting.
【０００３】従来リチウムイオン二次電池は、正極及び
負極の間に絶縁及び電解質保持の機能を持つセパレータ
を配置し、これらを円筒状に巻き回す等したものを金属
製の缶に収納し、密閉型缶電池として使用に供されてい
た。しかし、缶が金属製であるために重量が重く、携帯
用電子機器の普及に伴って、さらなる軽量化・小型化・
薄型化が要求されていた。Conventionally, a lithium ion secondary battery has a separator having a function of insulating and retaining an electrolyte between a positive electrode and a negative electrode. The separator is wound in a cylindrical shape and stored in a metal can. It was used as a mold can battery. However, since the can is made of metal, the weight is heavy, and with the spread of portable electronic devices, further reduction in weight and size,
Thinning was required.
【０００４】この問題の１つの解決手段として、正極、
負極、セパレータ及び電解質から構成される電池体を絶
縁性高分子材料からなる封入袋の中に密封することによ
り、金属製の缶を必要としない電池の構造及び封口方法
が特開平１０−１７２６０６号公報に開示されている。
この発明によれば、金属缶を用いない軽量かつ薄型の電
池の製造が可能である。One solution to this problem is to use a positive electrode,
By sealing a battery body composed of a negative electrode, a separator and an electrolyte in an enclosing bag made of an insulating polymer material, a battery structure and a sealing method that do not require a metal can are disclosed in JP-A-10-172606. It is disclosed in the gazette.
According to the present invention, a lightweight and thin battery without using a metal can can be manufactured.
【０００５】図２は特開平１０−１７２６０６号公報に
示されているような軽量かつ薄型のリチウムイオン二次
電池の例であり、電池体が金属缶でなく封入袋の中に密
封されている。尚、電流遮断機能等は省略し、基本構成
のみ図示している。（ａ）は平面図であり、（ｂ）は図
（ａ）のＡ−Ａ’断面図である。以下は図２について説
明する。FIG. 2 shows an example of a light-weight and thin lithium-ion secondary battery as disclosed in Japanese Patent Application Laid-Open No. 10-172606, in which the battery body is sealed not in a metal can but in a sealed bag. . Note that the current interrupt function and the like are omitted, and only the basic configuration is illustrated. (A) is a plan view, and (b) is an AA ′ cross-sectional view of (a). The following is a description of FIG.
【０００６】図において、電池体１は、正極２、負極
３、セパレータ４、電解質層５より構成される積層構造
体である。絶縁性高分子材料からなる封入袋６は、電池
体１を収納し密封するために、その周囲を袋シール部７
で接着されている。In FIG. 1, a battery body 1 is a laminated structure composed of a positive electrode 2, a negative electrode 3, a separator 4, and an electrolyte layer 5. An enclosing bag 6 made of an insulating polymer material surrounds a bag sealing portion 7 for housing and sealing the battery body 1.
It is glued.
【０００７】正極集電タブ８と負極集電タブ９は、電池
体１と各種電子機器の外部回路との間を電気的に接続す
る通電体で、封入袋６内部では正極２と負極３に接合
し、袋シール部７では金属用接着材１０を介して封入袋
６に接着している。The positive electrode current collecting tab 8 and the negative electrode current collecting tab 9 are current-carrying members for electrically connecting the battery body 1 to external circuits of various electronic devices. It is bonded and adhered to the enclosing bag 6 via the metal adhesive 10 at the bag seal portion 7.
【０００８】この電池の製造工程は以下の通りである。
まず、電池体１を収納した状態で封入袋６周囲の袋シー
ル部７を一部の開口部を残して接着する。このとき、集
電タブ８、９は袋シール部７において金属用接着剤１０
を介して封入袋６に接着する。残された一部の開口部か
ら封入袋６に電解液（図示せず）を注入し、全体を減圧
下においた後大気圧に戻して電池体1内部の電解質層５
に電解液を含浸させる。集電タブ８及び９を通して電池
体１を予備充電した後に、その開口部を封口して電池を
完成する。[0008] The manufacturing process of this battery is as follows.
First, with the battery body 1 housed, the bag seal 7 around the enclosing bag 6 is adhered leaving a part of the opening. At this time, the current collecting tabs 8 and 9 are attached to the metal adhesive 10 in the bag seal portion 7.
Is adhered to the enclosing bag 6. An electrolytic solution (not shown) is injected into the sealing bag 6 from a part of the remaining opening, and the whole is put under reduced pressure and then returned to the atmospheric pressure to return the electrolyte layer 5 inside the battery body 1.
Is impregnated with an electrolytic solution. After pre-charging the battery body 1 through the current collecting tabs 8 and 9, the opening is sealed to complete the battery.
【０００９】この電池は、集電タブ８及び９に外部電源
を接続し給電することによって充電され、充電後にタブ
８と９を外部回路に接続することにより電池として機能
する。This battery is charged by connecting an external power supply to the current collecting tabs 8 and 9 and supplying power, and functions as a battery by connecting the tabs 8 and 9 to an external circuit after charging.
【００１０】[0010]
【発明が解決しようとする課題】以上説明した構造の電
池とすれば、金属缶を用いずに軽量かつ薄型の電池が製
造可能である。ところで、リチウム二次電池は、過充電
時などに負極に金属リチウムが析出し易く、金属リチウ
ムは水に対する反応性が高い。このため、電池体部を完
全に密封して空気中の水分の侵入を防ぐ必要があり、電
池体を完全に密封するためのシール部の信頼性向上が重
要な課題となる。しかし、上記構造の電池においては、
シール部に不良が発生し易い問題があった。With the battery having the above-described structure, a lightweight and thin battery can be manufactured without using a metal can. By the way, in a lithium secondary battery, metallic lithium tends to precipitate on the negative electrode during overcharge or the like, and metallic lithium has high reactivity to water. For this reason, it is necessary to completely seal the battery body part to prevent intrusion of moisture in the air, and it is important to improve the reliability of the seal part for completely sealing the battery body. However, in the battery having the above structure,
There has been a problem that a defect easily occurs in the seal portion.
【００１１】以下その不良発生メカニズムについて説明
する。前述のように、製造工程においては、封入袋内部
に電池体を挿入し、開口部より電解液を注入して電池体
に含浸させた後、電池体の予備充電を行い、開口部を封
口する。電解液はエチレンカーボネート、ジエチルカー
ボネート、六フッ化リン酸リチウムの混合液などであ
り、予備充電は、電池が高温に放置された場合などにカ
ーボネート系の成分が分解してメタン系などのガスが発
生して封入袋を膨らませる恐れがあるため、予めこのガ
スを放出するために行われる。Hereinafter, the failure generation mechanism will be described. As described above, in the manufacturing process, the battery body is inserted into the sealed bag, the electrolyte is injected from the opening to impregnate the battery body, the battery body is precharged, and the opening is sealed. . The electrolyte is a mixed solution of ethylene carbonate, diethyl carbonate, lithium hexafluorophosphate, etc.Preliminary charging involves the decomposition of carbonate-based components such as methane-based gas when the battery is left at high temperatures. This is performed to release this gas in advance because there is a possibility that the gas will be generated and inflate the sealing bag.
【００１２】電池サイズを小型にするため封入袋はでき
るだけ小さくしてあり、最後にシールする開口部は電池
体に近い位置にある。このため、電解液注入時の跳ね
や、予備充電時に発生する泡により封入袋の開口部に電
解液が付着し易い。In order to reduce the size of the battery, the enclosing bag is made as small as possible, and the opening to be sealed last is located near the battery body. For this reason, the electrolyte tends to adhere to the opening of the enclosing bag due to the splash at the time of injection of the electrolyte or the bubbles generated at the time of preliminary charging.
【００１３】封入袋は一般にアルミなどの金属箔に変性
ポリエチレンなどの熱融着性樹脂を積層またはコートし
た材料であり、熱融着による接合などの手段で開口部が
シールされるため、開口部に電解液が付着した場合に
は、熱融着によるシールが不完全となり易い。[0013] The enclosing bag is generally a material in which a heat-fusible resin such as modified polyethylene is laminated or coated on a metal foil such as aluminum. The opening is sealed by means such as joining by heat fusion. When the electrolytic solution adheres to the seal, the seal due to the thermal fusion tends to be incomplete.
【００１４】また、封入袋の開口部付近に残存した電解
液が熱分解や空気中の水分との反応によりＨＦを発生
し、このＨＦが封入袋の金属箔と樹脂層との層間剥離を
引き起こし、この事もまたシール不良の原因となる。The electrolyte remaining near the opening of the enclosing bag generates HF due to thermal decomposition or reaction with moisture in the air, and this HF causes delamination between the metal foil and the resin layer of the enclosing bag. This also causes poor sealing.
【００１５】本発明は上記のような問題点を解消するた
めになされたもので、外装に金属缶を用いない軽量な電
池において、シール部分の信頼性の高い電池の構造及び
その製造法を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a battery structure having a highly reliable sealed portion and a method of manufacturing the same in a lightweight battery that does not use a metal can for its exterior. The purpose is to do.
【００１６】[0016]
【課題を解決するための手段】上記目的を達成するため
本発明の電池は、正極及び負極をイオン伝導層を介して
配置した電池体と、電解液とを、一端開放させた封入袋
に封入すると共に、前記正極及び負極のそれぞれに接続
する正極用及び負極用集電タブを上記封入袋の一端から
外部に取り出すようにした電池において、前記封入袋
を、前記電池体及び電解液を封入するための第１の封入
袋と、さらに前記電池体及び電解液を封入しかつ集電タ
ブを外部に取り出した第１の封入袋を封入するための第
２の封入袋とで構成したことを特徴とするものである。
これにより封入袋のシール部への電解液の付着を防止
し、シール部の信頼性を高めることができる。In order to achieve the above object, a battery according to the present invention comprises a battery body in which a positive electrode and a negative electrode are arranged via an ion conductive layer, and an electrolytic solution enclosed in a sealing bag having one end opened. In addition, in a battery in which the positive and negative electrode current collection tabs connected to each of the positive and negative electrodes are taken out from one end of the sealing bag, the sealing bag is filled with the battery body and the electrolytic solution. And a second encapsulation bag for enclosing the first encapsulation bag for enclosing the battery body and the electrolytic solution and for taking out the current collection tab to the outside. It is assumed that.
Thereby, adhesion of the electrolytic solution to the sealing portion of the sealing bag can be prevented, and the reliability of the sealing portion can be improved.
【００１７】前記第１の封入袋の厚みは、前記第２の封
入袋の厚みよりも薄いことが好ましく、これにより封入
袋の二重化による電池の厚みの増加を抑制できる。It is preferable that the thickness of the first encapsulation bag is smaller than the thickness of the second encapsulation bag, so that an increase in the thickness of the battery due to the double encapsulation bag can be suppressed.
【００１８】具体的には、前記第１の封入袋を単層の高
分子シートより成るものとし、前記第２の封入袋を金属
層と高分子層が積層されたラミネートシートより成るも
のとすることが好ましい。Specifically, the first encapsulating bag is made of a single-layer polymer sheet, and the second encapsulating bag is made of a laminated sheet in which a metal layer and a polymer layer are laminated. Is preferred.
【００１９】本発明の電池の製造するに当たっては、
（１）前記電池体と前記電解液とを前記第１の封入袋に
収納し、（２）該第１の封入袋の一端を開放させたま
ま、減圧操作による前記電池体内部への前記電解液の注
入と、前記電池体の予備充電とを行い、（３）前記第１
の封入袋の密封を行うことが好ましく、これにより封入
袋を二重化した本発明の電池において従来技術と同様に
減圧操作による電解液の注入と、予備充電とを行うこと
ができる。In manufacturing the battery of the present invention,
(1) storing the battery body and the electrolytic solution in the first encapsulation bag, and (2) keeping the one end of the first encapsulation bag open to perform the electrolysis into the battery body by decompression operation. Performing liquid injection and preliminary charging of the battery body;
It is preferable to seal the sealed bag, whereby the battery of the present invention in which the sealed bag is doubled can perform the injection of the electrolytic solution by the decompression operation and the preliminary charging in the same manner as in the related art.
【００２０】また、上記製造方法に代えて、（１）前記
電池体と前記電解液とを上面開放容器に収納し、（２）
該上面開放容器において、減圧操作による前記電池体内
部へ前記電解液の注入と、前記電池体の予備充電とを行
い、（３）該電池体を前記上面開放容器より取りだして
前記第1の封入袋に収納し、（４）前記第１の封入袋の
密封を行うことがさらに好ましく、これにより第1の封
入袋のシール部への電解液の付着量を減少し、シール部
の信頼性をさらに向上することができる。Further, instead of the above-mentioned manufacturing method, (1) the battery body and the electrolytic solution are housed in an open-top container, and (2)
In the top open container, the electrolytic solution is injected into the battery body by a pressure reducing operation, and the battery body is precharged. (3) The battery body is removed from the top open container and the first sealing is performed. It is more preferable that the first enclosing bag is sealed in the bag, and the amount of the electrolytic solution adhering to the sealing portion of the first enclosing bag is reduced, and the reliability of the sealing portion is reduced. It can be further improved.
【００２１】[0021]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら説明する。図１（ａ）は本実施の
形態に係る電池の平面図であり、図１（ｂ）は（ａ）の
Ａ−Ａ’断面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a plan view of the battery according to the present embodiment, and FIG. 1B is a cross-sectional view taken along the line AA ′ of FIG.
【００２２】図１において、電池体１は、正極２、負極
３、セパレータ４、電解質層５より構成される積層構造
体である。ここで、セパレーター４及び電解質層５はイ
オン伝導層の役割を果たす。この電池体１は、絶縁性高
分子材料からなる第１の封入袋２１に封入され、第１の
封入袋２１の周囲は第1の袋シール部２２で接着されて
密封されている。In FIG. 1, a battery body 1 is a laminated structure composed of a positive electrode 2, a negative electrode 3, a separator 4, and an electrolyte layer 5. Here, the separator 4 and the electrolyte layer 5 play a role of an ion conductive layer. The battery body 1 is sealed in a first sealing bag 21 made of an insulating polymer material, and the periphery of the first sealing bag 21 is adhered and sealed by a first bag seal portion 22.
【００２３】さらに、この電池体を第１の封入袋２１に
封入したものは、絶縁性高分子材料からなる第２の封入
袋２３に収納され、第２の封入袋２３の周囲は第２の袋
シール部２４で接着されて密封されている。Further, the battery body sealed in a first sealing bag 21 is stored in a second sealing bag 23 made of an insulating polymer material, and the periphery of the second sealing bag 23 is a second sealing bag. It is bonded and sealed by a bag seal portion 24.
【００２４】正極集電タブ８と負極集電タブ９は、電池
体１と各種電子機器の外部回路との間を電気的に接続す
る通電体で、第１の封入袋２１内部では正極２と負極３
に接合し、第1の封入袋シール部２２、第２の封入袋シ
ール部２４では金属接着用材１０を介して第１の封入袋
２１、第２の封入袋２３に接着している。The positive electrode current collecting tab 8 and the negative electrode current collecting tab 9 are current conductors for electrically connecting the battery body 1 and external circuits of various electronic devices. Negative electrode 3
The first sealing bag sealing portion 22 and the second sealing bag sealing portion 24 are bonded to the first sealing bag 21 and the second sealing bag 23 via the metal bonding material 10.
【００２５】本実施の形態に係る電池の製造工程は以下
の通りである。The manufacturing process of the battery according to the present embodiment is as follows.
【００２６】まず、正極２及び負極３をイオン伝導層で
あるセパレーター４及び電解質層５を介して配置した電
池体１、及び電池体１の正極２及び負極３に接合した集
電タブ８、９を、第1の封入袋に収納する。第1の封入袋
は、一端を開放するように、即ち開口部を残して、袋シ
ール部２２を接着する。この時、集電タブ８、９を第1
の封入袋の別の一端より外部に取り出すため、袋シール
部２２の開口部と別の位置において金属用接着剤１０を
介して第1の封入袋２１に接着する。金属製の集電タブ
は、高分子製の封入袋には元来接着しづらいため、上記
のように開口部と異なる位置において接着を行うことと
し、電解液の注入前に接着を行っておく方が有利であ
る。尚、シール接合装置の都合等の理由がある場合に
は、集電タブ８、９の接着位置を開口部に一致させても
良い。First, a battery body 1 in which a positive electrode 2 and a negative electrode 3 are arranged via a separator 4 and an electrolyte layer 5 which are ion conductive layers, and current collecting tabs 8 and 9 joined to the positive electrode 2 and the negative electrode 3 of the battery body 1 Is stored in the first sealing bag. The first sealing bag is bonded to the bag sealing portion 22 so as to open one end, that is, leaving an opening. At this time, the current collecting tabs 8 and 9 are
In order to take it out from the other end of the encapsulation bag to the outside, it is bonded to the first encapsulation bag 21 via the metal adhesive 10 at a position different from the opening of the bag seal portion 22. Since the metal current collection tab is originally difficult to adhere to the polymer encapsulation bag, the adhesion is performed at a position different from the opening as described above, and the adhesion is performed before the injection of the electrolyte. Is more advantageous. In addition, when there is a reason such as convenience of the seal bonding device, the bonding position of the current collecting tabs 8 and 9 may be made to coincide with the opening.
【００２７】次に、開口部から第1の封入袋２１に電解
液を注入する。Next, an electrolytic solution is injected into the first sealing bag 21 from the opening.
【００２８】次に、第1の封入袋の開口部を開放させた
まま、全体を減圧下においた後に大気圧に戻し、電池体
１内の電解質層５に電解液を注入した後、集電タブ８及
び９を通して電池体１を予備充電する。電解液注入は圧
力操作により行うものであり、また予備充電は前述のよ
うにガス発生を伴うため、これらの工程を第１の封入袋
の密封前に行うことが重要である。Next, while the opening of the first enclosing bag is kept open, the whole is put under reduced pressure and then returned to the atmospheric pressure, and after the electrolyte is injected into the electrolyte layer 5 in the battery body 1, the current is collected. The battery body 1 is precharged through the tabs 8 and 9. The injection of the electrolyte is performed by a pressure operation, and the preliminary charging involves gas generation as described above. Therefore, it is important to perform these steps before the first sealing bag is sealed.
【００２９】次に、第１の封入袋２１の開口部を接着し
て密封する。Next, the opening of the first enclosing bag 21 is adhered and sealed.
【００３０】ここで、電解液注入及び予備充電の際に
は、従来例同様、第1の袋シール部２２の開口部には電
解液が付着する。電解液の付着は前述の通り、開口部に
おける袋シール部２２の接着に悪影響を与えるが、本発
明においては、第１の封入袋２１は電解液が漏れない程
度に袋シール部２２が接着できれば良いため、付着量が
甚だしい場合を除き問題とはならない。Here, during the injection of the electrolyte and the preliminary charging, the electrolyte adheres to the opening of the first bag seal portion 22 as in the conventional example. As described above, the adhesion of the electrolytic solution has an adverse effect on the adhesion of the bag seal portion 22 at the opening. However, in the present invention, the first encapsulating bag 21 can adhere to the bag seal portion 22 to such an extent that the electrolytic solution does not leak. Since it is good, it is not a problem except when the amount of adhesion is extremely large.
【００３１】尚、第1の袋シール部２２の開口部に付着
する電解液量を減少させるため、上記方法に代えて下記
方法をとっても良い。Incidentally, in order to reduce the amount of the electrolyte adhering to the opening of the first bag seal portion 22, the following method may be used instead of the above method.
【００３２】電池体１及び集電タブ８、９を第１の封入
袋２１に収納する前に、別の上面開放した容器中に電解
液と共に入れ、全体を減圧下においた後に大気圧にもど
して電池体１内部へ電解液を注入し、電池体１の予備充
電を行った後、電池体１を前記上面開放容器から取り出
して余分な電解液を拭き取り、第１の封入袋に収納し、
第1の封入袋を密閉する。Before storing the battery body 1 and the current collecting tabs 8 and 9 in the first encapsulating bag 21, put them together with the electrolytic solution in another container having an open top, return the whole to a reduced pressure, and then return to the atmospheric pressure. After injecting the electrolyte into the battery body 1 and pre-charging the battery body 1, the battery body 1 is taken out of the open top container, excess electrolyte solution is wiped off, and stored in the first enclosing bag.
Seal the first encapsulation bag.
【００３３】この方法によれば、開口部への電解液付着
の主原因である電解液の注入及び予備充電を別容器で行
うため、開口部に付着する電解液量を減少させることが
できる。According to this method, since the injection of the electrolyte and the preliminary charging, which are the main causes of the adhesion of the electrolyte to the opening, are performed in a separate container, the amount of the electrolyte adhering to the opening can be reduced.
【００３４】次に、このようにして電池体１と電解液と
を第１の封入袋２１に封入しかつ集電タブ８、９を外部
に取り出したものを、集電タブ８、９の一部を露出して
第２の封入袋２３に収納する。この時電解液は第１の封
入袋内に密封された状態にあり、また微量の電解液が第
１の封入袋２１の外部に付着していたとしても、拭き取
ることは容易であるため、第２の封入袋２３の袋シール
部２４に電解液が付着することはない。Next, the battery body 1 and the electrolytic solution thus sealed in the first sealing bag 21 and the current collecting tabs 8 and 9 taken out are taken out of the current collecting tabs 8 and 9. The portion is exposed and stored in the second sealing bag 23. At this time, the electrolyte is sealed in the first encapsulation bag, and even if a small amount of the electrolyte adheres to the outside of the first encapsulation bag 21, it is easy to wipe off the electrolyte. The electrolyte does not adhere to the bag seal portion 24 of the second sealing bag 23.
【００３５】第２の袋シール部２４を接着し、第２の封
入袋２３を密封する。この時集電タブ８及び９は袋シー
ル部２４の一部分において金属用接着剤１０を介して第
２の封入袋２３に接着する。The second bag sealing portion 24 is adhered, and the second sealing bag 23 is sealed. At this time, the current collecting tabs 8 and 9 adhere to the second encapsulating bag 23 via the metal adhesive 10 at a part of the bag seal portion 24.
【００３６】尚、第２の封入袋２３の密封前に袋内の脱
気を行い、第１の封入袋と第２の封入袋を密着させてお
くことが望ましい。これにより、第1の封入袋と第２の
封入袋の間に残存する気体の熱膨張により、電池が体積
変化を起こす等の問題発生を防止することができる。It is preferable that the inside of the second encapsulating bag 23 is evacuated before the second enclosing bag 23 is sealed, so that the first enclosing bag and the second enclosing bag are brought into close contact with each other. Thus, it is possible to prevent the occurrence of problems such as a change in the volume of the battery due to the thermal expansion of the gas remaining between the first sealing bag and the second sealing bag.
【００３７】得られた電池は、従来例の電池と同じく集
電タブ８と９に外部電源を接続して充電することによっ
て完成し、充電後にタブ８と９を外部回路に接続するこ
とにより電池として機能する。The obtained battery is completed by connecting an external power source to the current collecting tabs 8 and 9 and charging the same as the conventional battery. After charging, the battery is connected by connecting the tabs 8 and 9 to an external circuit. Function as
【００３８】本実施の形態の電池においては、第２の封
入袋２３が電池の形状を保持し、電池体の密封及び雰囲
気からの水分侵入を防ぐ役割を果たす。第１の封入袋２
１は、注入された液の密封機能を、少なくとも第２の封
入袋を密封するまで維持すればよい。In the battery of the present embodiment, the second enclosing bag 23 plays a role of maintaining the shape of the battery, sealing the battery body and preventing moisture from entering from the atmosphere. First enclosed bag 2
1 only needs to maintain the sealing function of the injected liquid until at least the second sealing bag is sealed.
【００３９】従って、第１の封入袋の厚みは、第２の封
入袋の厚みよりも薄くすることができる。完成した電池
の薄型化のためには第1の封入袋の厚みはできるだけ薄
い方が好ましい。Accordingly, the thickness of the first enclosing bag can be made smaller than the thickness of the second enclosing bag. In order to make the completed battery thinner, it is preferable that the thickness of the first encapsulation bag is as thin as possible.
【００４０】具体的には、第１の封入袋にポリエチレン
等の単層の高分子シートを用い、第２の封入袋には長期
的に水分の浸透を防止できるようアルミなどの金属層に
変性ポリエチレンなどの高分子層を積層またはコートし
たラミネートシートを使用することが好ましい。この場
合、従来の電池と比較して厚さの増加は極めて小さく、
数十ミクロン程度に留めることができる。Specifically, a single-layered polymer sheet such as polyethylene is used for the first encapsulation bag, and a metal layer such as aluminum is used for the second encapsulation bag so as to prevent permeation of water for a long period of time. It is preferable to use a laminate sheet in which a polymer layer such as polyethylene is laminated or coated. In this case, the increase in thickness is extremely small compared to the conventional battery,
It can be as small as several tens of microns.
【００４１】こうして得られた電池においては、第２の
封入袋が、シール部に電解液が付着することなく密封さ
れているため、シール部分の信頼性が高い。また、第１
の封入袋は極めて薄いため従来同様、薄型軽量の電池を
得ることができる。In the battery thus obtained, the second sealing bag is sealed without the electrolyte solution adhering to the sealing portion, so that the reliability of the sealing portion is high. Also, the first
Is extremely thin, so that a thin and lightweight battery can be obtained as in the conventional case.
【００４２】尚、本実施の形態においては、第１の封入
袋２１、第２の封入袋２３の外周の全周囲をシールした
例を示したが、一般に素材を各種形状に裁断、折り曲げ
などして袋状にするには多くの方法があり、別の方法に
よる異なる形態の袋を使用しても良く、各種形態に対応
してシール部位が異なっても良いことは言うまでもな
い。また、封入袋として、各種材料を箱型にプレス成形
したものを用いていも良い。In this embodiment, an example is shown in which the entire outer periphery of the first encapsulation bag 21 and the second encapsulation bag 23 is sealed, but the material is generally cut or bent into various shapes. There are many methods for making the bag into a bag shape. Bags of different forms by another method may be used, and it goes without saying that the sealing portion may be different depending on various forms. Further, as the enclosing bag, a material obtained by press-molding various materials into a box shape may be used.
【００４３】また、第１の封入袋２１の袋シール部２２
と、第２の封入袋２３の袋シール部２４とは重なり合わ
ないよう図示しているが、電池サイズを小さくするため
にシール部の一部が重なるように、つまり、第1の封入
袋シール部２２を挟み込んで第２の封入袋シール部２４
を接着しても良い。The bag sealing portion 22 of the first enclosing bag 21
And the bag sealing portion 24 of the second encapsulating bag 23 are shown not to overlap with each other. However, in order to reduce the battery size, a part of the sealing portion overlaps, that is, the first encapsulating bag seal The second sealed bag sealing portion 24 sandwiching the portion 22
May be adhered.
【００４４】さらにまた、本実施の形態においては平板
状電池の例を示したが、本発明の第１の封入袋と第２の
封入袋を使用する構造及び方法は、その他の形状の電
池、例えば、巻き型電池にも適用可能である。Further, in this embodiment, an example of a flat battery is shown, but the structure and method of using the first and second sealed bags of the present invention are not limited to batteries of other shapes. For example, the present invention can be applied to a wound battery.
【００４５】[0045]
【発明の効果】本発明の電池は、封入袋をパッケージに
使用した軽量電池において、封入袋を、電池体を直接封
入する第１の封入袋と、さらにこの第１の封入袋を封入
する第２の封入袋とで構成したものであるため、第２の
封入袋のシール部への電解液付着を防止し、シール部接
着状態の良好な、高い信頼性の電池とすることができ
る。According to the battery of the present invention, in a light-weight battery using an encapsulation bag as a package, the encapsulation bag is a first encapsulation bag for directly enclosing a battery body, and a second encapsulation bag for enclosing the first encapsulation bag. Since it is composed of the second sealing bag, adhesion of the electrolytic solution to the sealing portion of the second sealing bag can be prevented, and a highly reliable battery with a good adhesion of the sealing portion can be obtained.
【００４６】また、前記第１の封入袋の厚みを、前記第
２の封入袋の厚みよりも薄くすることにより封入袋の二
重化による電池の厚みの増加を抑制し、薄型かつ高信頼
性の電池とすることができる。Further, by making the thickness of the first encapsulation bag smaller than the thickness of the second encapsulation bag, an increase in the thickness of the battery due to the double encapsulation bag is suppressed, and a thin and highly reliable battery is provided. It can be.
【００４７】またさらに、前記第１の封入袋を単層の高
分子シートより成るものとし、前記第２の封入袋を金属
層と高分子層が積層されたラミネートシートより成るも
のとすることにより、封入袋の二重化による電池の厚み
の増加を抑制し、かつ水分の侵入を効果的に抑制し、薄
型、軽量かつ高信頼性の電池を作製できる。Further, the first encapsulating bag is made of a single-layer polymer sheet, and the second encapsulating bag is made of a laminated sheet in which a metal layer and a polymer layer are laminated. In addition, it is possible to manufacture a thin, lightweight, and highly reliable battery by suppressing an increase in the thickness of the battery due to the dual use of the enclosing bag and effectively suppressing the invasion of moisture.
【００４８】本発明の電池を製造するに当たっては、第
１の封入袋の一端を開放させたまま、減圧操作による前
記電池体内部への前記電解液の注入と、前記電池体の予
備充電とを行うことにより、従来技術と同様に減圧操作
による電解液の注入と、予備充電とを行うことができ
る。In manufacturing the battery of the present invention, while the one end of the first encapsulating bag is opened, the injection of the electrolytic solution into the inside of the battery body by the decompression operation and the preliminary charging of the battery body are performed. By doing so, it is possible to perform the injection of the electrolytic solution by the decompression operation and the preliminary charging, as in the related art.
【００４９】また、上記製造方法に代えて、前記電池体
と前記電解液とを上面開放容器に収納し、減圧操作によ
る前記電池体内部へ前記電解液の注入と、前記電池体の
予備充電とを行った後、該電池体を前記上面開放容器よ
り取りだして前記第1の封入袋に封入する方法を使用す
ることにより、第1の封入袋のシール部への電解液の付
着量を減少し、本発明の電池の信頼性をさらに向上する
ことができる。Further, instead of the above-described manufacturing method, the battery body and the electrolytic solution are housed in an open-top container, and the electrolytic solution is injected into the battery body by a pressure reducing operation, and the battery body is precharged. After performing the above, by using the method of taking out the battery body from the top open container and enclosing in the first encapsulation bag, the amount of the electrolytic solution attached to the seal portion of the first encapsulation bag is reduced. Thus, the reliability of the battery of the present invention can be further improved.
【図１】 本発明の電池の一例を示す図であり、（ａ）
は平面図、（ｂ）は（ａ）のＡ−Ａ’断面図である。FIG. 1 is a diagram showing an example of a battery of the present invention, wherein (a)
Is a plan view, and (b) is a cross-sectional view taken along line AA ′ of (a).
【図２】 従来の電池の一例を示す図であり、（ａ）は
平面図、（ｂ）は（ａ）のＡ−Ａ’断面図である。FIGS. 2A and 2B are diagrams showing an example of a conventional battery, in which FIG. 2A is a plan view, and FIG.
１ 電池体、２ 正極、３ 負極、４ セパレータ、５
電解質層、６ 封入袋、７ 袋シール部、８ 正極集
電タブ、９ 負極集電タブ、１０ 金属用接着材、２１
第１の封入袋、２２ 第1の袋シール部、２３ 第２
の封入袋、２４第２の袋シール部。1 battery body, 2 positive electrode, 3 negative electrode, 4 separator, 5
Electrolyte layer, 6 encapsulation bag, 7 bag sealing section, 8 positive electrode current collecting tab, 9 negative electrode current collecting tab, 10 metal adhesive, 21
First sealed bag, 22 First sealed bag, 23 Second
24, the second bag seal section.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 市村 英男 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 川口 憲治 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 森安 雅治 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 中出口 真治 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 相原 茂 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 竹村 大吾 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 吉岡 省二 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 吉瀬 万希子 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 荒金 淳 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 塩田 久 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 漆畑 広明 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 西村 隆 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 吉田 育弘 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 村井 道雄 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 塚本 寿 京都府京都市南区吉祥院西ノ庄猪之馬場町 １番地 日本電池株式会社内 Ｆターム(参考） 5H011 AA17 CC02 CC06 CC10 DD13 DD23 KK01 5H029 AJ14 AJ15 AL12 BJ04 BJ23 CJ13 CJ16 CJ28 DJ02 EJ01 EJ12 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Ichimura 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Kenji Kawaguchi 2- 2-3 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Masaharu Moriyasu 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Corporation (72) Inventor Shinji Nakaguchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Shigeru Aihara 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. Inside (72) Inventor Shoji Yoshioka 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Makiko Yoshise 2-3-2 Marunouchi, Ta-ku, Mitsubishi Electric Co., Ltd. (72) Inventor Atsushi Arakane 2-3-2, Marunouchi, Chiyoda-ku, Tokyo San-Bi Electric Co., Ltd. (72) Inventor Hisashi Shiota, Chiyoda-ku, Tokyo 2-3-2 Marunouchi, Mitsubishi Electric Co., Ltd. (72) Inventor Hiroaki Urushiba 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Co., Ltd. (72) Inventor Takashi Nishimura Marunouchi, Chiyoda-ku, Tokyo 2-3-3, Mitsui Electric Co., Ltd. (72) Inventor Ikuhiro Yoshida 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Tokyo (72) Michio Murai 2--2, Marunouchi, Chiyoda-ku, Tokyo No. 3 Mitsubishi Electric Co., Ltd. (72) Inventor Hisashi Tsukamoto No. 1 Kisho-in, Nishino-sho, Inonoba-ba-cho, Minami-ku, Kyoto, Kyoto Prefecture F-term in Japan Battery Co., Ltd. 5H011 AA17 CC02 CC06 CC10 DD13 DD23 KK01 5H029 AJ14 AJ15 AL12 BJ04 BJ23 CJ13 CJ16 CJ28 DJ02 EJ01 EJ12
Claims (5)
置した電池体と、電解液とを、一端開放させた封入袋に
封入すると共に、前記正極及び負極のそれぞれに接続す
る正極用及び負極用集電タブを上記封入袋の一端から外
部に取り出すようにした電池において、 前記封入袋を、前記電池体及び前記電解液を封入するた
めの第１の封入袋と、さらに前記電池体及び前記電解液
を封入しかつ前記集電タブを外部に取り出した第１の封
入袋を封入するための第２の封入袋とで構成したことを
特徴とする電池。1. A battery for which a positive electrode and a negative electrode are arranged via an ion conductive layer, and an electrolytic solution are sealed in a sealing bag opened at one end and connected to each of the positive electrode and the negative electrode. A battery in which a current collecting tab is taken out from one end of the enclosing bag, wherein the enclosing bag is a first enclosing bag for enclosing the battery body and the electrolytic solution, and further includes the battery body and A battery comprising: a second encapsulation bag for enclosing an electrolyte and a first encapsulation bag from which the current collection tab is taken out.
封入袋の厚みよりも薄いことを特徴とする請求項１記載
の電池。2. The battery according to claim 1, wherein the thickness of the first encapsulation bag is smaller than the thickness of the second encapsulation bag.
より成り、前記第２の封入袋が金属層と高分子層が積層
されたラミネートシートより成ることを特徴とする請求
項１または２記載の電池。3. The method according to claim 1, wherein the first encapsulating bag is made of a single-layer polymer sheet, and the second encapsulating bag is made of a laminated sheet in which a metal layer and a polymer layer are laminated. Or the battery according to 2.
り、（１）前記電池体と前記電解液とを前記第１の封入
袋に収納し、（２）該第１の封入袋の一端を開放させた
まま、減圧操作による前記電池体内部への前記電解液の
注入と、前記電池体の予備充電とを行い、（３）前記第
１の封入袋の密封を行うことを特徴とする請求項１記載
の電池の製造方法。4. The method of manufacturing the battery according to claim 1, wherein (1) the battery body and the electrolytic solution are housed in the first encapsulation bag, and (2) one end of the first encapsulation bag is connected. While the battery is kept open, the injection of the electrolytic solution into the battery body by the decompression operation and the preliminary charging of the battery body are performed, and (3) the first sealing bag is sealed. Item 10. A method for producing a battery according to Item 1.
り、（１）前記電池体と前記電解液とを上面開放容器に
収納し、（２）該上面開放容器中において、減圧操作に
よる前記電池体内部へ前記電解液の注入と、前記電池体
の予備充電とを行い、（３）該電池体を前記上面開放容
器より取りだして前記第1の封入袋に収納し、（４）前
記第１の封入袋の密封を行うことを特徴とする請求項１
記載の電池の製造方法。5. The battery according to claim 1, wherein (1) the battery body and the electrolytic solution are housed in an open-top container, and (2) the battery is depressurized in the open-top container. Injecting the electrolytic solution into the body and pre-charging the battery body, (3) removing the battery body from the open top container and storing it in the first encapsulation bag; 2. The sealing bag of claim 1 is sealed.
A method for producing the battery according to the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11000133A JP2000200587A (en) | 1999-01-04 | 1999-01-04 | Battery and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11000133A JP2000200587A (en) | 1999-01-04 | 1999-01-04 | Battery and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000200587A true JP2000200587A (en) | 2000-07-18 |
Family
ID=11465544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11000133A Pending JP2000200587A (en) | 1999-01-04 | 1999-01-04 | Battery and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000200587A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110246A (en) * | 2000-09-29 | 2002-04-12 | At Battery:Kk | Method of producing thin battery |
| JP2005209587A (en) * | 2004-01-26 | 2005-08-04 | Japan Storage Battery Co Ltd | Battery |
| JP2008218347A (en) * | 2007-03-07 | 2008-09-18 | Gs Yuasa Corporation:Kk | Battery |
| WO2009136660A1 (en) * | 2008-05-08 | 2009-11-12 | 太陽誘電株式会社 | Electrochemical device and packaging structure thereof |
| WO2010028434A1 (en) * | 2008-09-09 | 2010-03-18 | Cap-Xx Limited | A package for an electrical device |
| JP2010086803A (en) * | 2008-09-30 | 2010-04-15 | Dainippon Printing Co Ltd | Electrochemical cell |
-
1999
- 1999-01-04 JP JP11000133A patent/JP2000200587A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002110246A (en) * | 2000-09-29 | 2002-04-12 | At Battery:Kk | Method of producing thin battery |
| JP2005209587A (en) * | 2004-01-26 | 2005-08-04 | Japan Storage Battery Co Ltd | Battery |
| JP4604500B2 (en) * | 2004-01-26 | 2011-01-05 | 株式会社Ｇｓユアサ | battery |
| JP2008218347A (en) * | 2007-03-07 | 2008-09-18 | Gs Yuasa Corporation:Kk | Battery |
| WO2009136660A1 (en) * | 2008-05-08 | 2009-11-12 | 太陽誘電株式会社 | Electrochemical device and packaging structure thereof |
| JP2013153192A (en) * | 2008-05-08 | 2013-08-08 | Taiyo Yuden Co Ltd | Electrochemical device and mounting structure thereof |
| JP5320391B2 (en) * | 2008-05-08 | 2013-10-23 | 太陽誘電株式会社 | Electrochemical device and its mounting structure |
| US8765277B2 (en) | 2008-05-08 | 2014-07-01 | Taiyo Yuden Co., Ltd. | Electrochemical device and packaging structure thereof |
| WO2010028434A1 (en) * | 2008-09-09 | 2010-03-18 | Cap-Xx Limited | A package for an electrical device |
| CN102210038A (en) * | 2008-09-09 | 2011-10-05 | Cap-Xx有限公司 | A package for an electrical device |
| JP2010086803A (en) * | 2008-09-30 | 2010-04-15 | Dainippon Printing Co Ltd | Electrochemical cell |
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