JP2003234094A - Nonaqueous electrolyte battery - Google Patents
Nonaqueous electrolyte batteryInfo
- Publication number
- JP2003234094A JP2003234094A JP2002032104A JP2002032104A JP2003234094A JP 2003234094 A JP2003234094 A JP 2003234094A JP 2002032104 A JP2002032104 A JP 2002032104A JP 2002032104 A JP2002032104 A JP 2002032104A JP 2003234094 A JP2003234094 A JP 2003234094A
- Authority
- JP
- Japan
- Prior art keywords
- power generating
- battery case
- aqueous electrolyte
- resin film
- power generation
- 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.)
- Granted
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池ケースを樹脂
フィルムによって形成した非水電解質電池に関する。TECHNICAL FIELD The present invention relates to a non-aqueous electrolyte battery having a battery case formed of a resin film.
【０００２】[0002]
【従来の技術】近年、携帯型電子機器の発達がめざまし
いが、このような携帯型電子機器に使用される電池の小
型軽量化の要望がますます高まっている。電池重量の軽
減のための手段のひとつとして、従来使用されていた容
器状の金属ケースに代わり、可撓性を有する袋状の金属
ラミネートケース外装体を用いた電池が検討されてい
る。しかし、この種の電池は、ケース内に収容された発
電要素を圧迫する能力に劣り、電池ケース内で発電要素
がずれ動くことを防止しにくいという問題がある。この
ため、電池が落下等により衝撃を受けた際に、電池ケー
ス内で発電要素が大きく動いたり変形したりしてしま
い、その結果、発電要素から導出されたリード片が接続
部分で切れて電池として機能できなくなることがあっ
た。2. Description of the Related Art In recent years, the development of portable electronic devices has been remarkable, but there is an increasing demand for smaller and lighter batteries used in such portable electronic devices. As one of the means for reducing the weight of the battery, a battery using a flexible bag-shaped metal laminate case outer casing is being considered in place of the conventionally used container-shaped metal case. However, this type of battery has a problem in that it is inferior in the ability to press the power generating element housed in the case and it is difficult to prevent the power generating element from shifting in the battery case. For this reason, when the battery is shocked by being dropped, the power generating element moves or deforms significantly inside the battery case, and as a result, the lead piece derived from the power generating element is cut at the connecting portion and the battery is disconnected. There was a case that could not function as.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上記事情に鑑
みてなされたものであって、電池ケースを樹脂フィルム
によって形成した非水電解質電池において、その耐衝撃
性を改善することを目的とするものである。The present invention has been made in view of the above circumstances, and an object thereof is to improve the impact resistance of a non-aqueous electrolyte battery in which a battery case is formed of a resin film. It is a thing.
【０００４】[0004]
【課題を解決するための手段】上記課題を解決するため
の請求項１の発明は、可撓性を有する樹脂フィルムにて
形成した電池ケース内に巻回型の発電要素を収容して密
閉してなる非水電解質電池において、前記発電要素を前
記電池ケース内に複数個収容し、前記樹脂フィルムが前
記発電要素間に形成されるくびれ部分に入り込むように
前記発電要素に密着させたところに特徴を有する。According to the invention of claim 1 for solving the above-mentioned problems, a winding type power generating element is housed and hermetically sealed in a battery case formed of a flexible resin film. In the non-aqueous electrolyte battery formed as described above, a plurality of the power generating elements are housed in the battery case, and the resin film is closely attached to the power generating elements so that the resin film enters a constricted portion formed between the power generating elements. Have.
【０００５】また、請求項２の発明は、請求項１に記載
の非水電解質電池であって、前記各発電要素間の少なく
とも一部が接着剤により相互に接着されているところに
特徴を有する。The invention according to claim 2 is the non-aqueous electrolyte battery according to claim 1, characterized in that at least a part of each of the power generating elements is adhered to each other with an adhesive. .
【０００６】請求項３の発明は、請求項１または２に記
載の非水電解質電池であって、前記発電要素と前記樹脂
フィルムとが接着剤により接着されているところに特徴
を有する。The invention of claim 3 is the non-aqueous electrolyte battery according to claim 1 or 2, characterized in that the power generating element and the resin film are adhered by an adhesive.
【０００７】請求項４の発明は、請求項１ないし３のい
ずれかに記載の非水電解質電池であって、前記発電要素
から導出されたリード片が前記電池ケース内において電
気的に接続されているところに特徴を有する。A fourth aspect of the present invention is the non-aqueous electrolyte battery according to any one of the first to third aspects, wherein the lead piece led out from the power generating element is electrically connected in the battery case. It has a feature in that it exists.
【０００８】さらに請求項５の発明は、請求項１ないし
請求項４のいずれかに記載の非水電解質電池であって、
前記電池ケースは、前記樹脂フィルムの端縁部を互いに
積層して接着することによって封口されると共に、前記
発電要素から導出されたリード片が前記樹脂フィルムの
前記積層部分の前記樹脂フィルム間を通って前記電池ケ
ース外に導出され、かつ、それらのリード片は前記樹脂
フィルムの前記積層部分内で他の発電要素との間で電気
的に接続されているところに特徴を有する。Further, the invention of claim 5 is the non-aqueous electrolyte battery according to any one of claims 1 to 4.
The battery case is sealed by laminating and adhering the edge portions of the resin films to each other, and the lead pieces led out from the power generating element pass between the resin films in the laminated portion of the resin films. Is characterized in that it is led out to the outside of the battery case, and those lead pieces are electrically connected to other power generating elements in the laminated portion of the resin film.
【０００９】[0009]
【発明の作用】巻回型の発電要素は従来の積層型に比べ
て生産性に優れるが、複数個並べた場合に、発電要素の
周縁が丸みをおびていることから、各発電要素間にくび
れ部分が形成される。このようなくびれ部分があると、
発電要素を電池ケース内に収容した場合に、発電要素間
のくびれ部分と電池ケースとの間に大きな空間が生じ、
特に電池ケースが可撓性を有する樹脂フィルムにて形成
されている場合には、電池が衝撃を受けた際に発電要素
が電池ケース内で大きく動いてしまう。The winding type power generating element is more excellent in productivity than the conventional laminated type, but when a plurality of winding type power generating elements are arranged, the peripheral edges of the power generating elements are rounded, so that there is a constriction between the power generating elements. A part is formed. If there is a constriction like this,
When the power generation element is housed in the battery case, a large space is created between the constricted part between the power generation elements and the battery case,
In particular, when the battery case is formed of a flexible resin film, the power generation element moves largely inside the battery case when the battery receives an impact.
【００１０】そこで、上記請求項１の発明では、上述し
たように、樹脂フィルムを発電要素間に形成されるくび
れ部分に入り込むように密着させる構成とした。このよ
うにすると、電池ケースと発電要素との間に余分な隙間
が存在しないから、電池に落下等による衝撃が加わった
場合でも、発電要素が電池ケース内で大きく動いてしま
ったり、互いにずれて大きく変形することが防止され
る。したがって、発電要素から導出されたリード片が接
続部分で切れることを防止することができ、耐衝撃性に
優れる非水電解質電池を得ることができるという優れた
作用効果を奏する。Therefore, in the invention of claim 1, as described above, the resin film is closely attached so as to enter the constricted portion formed between the power generating elements. By doing this, there is no extra gap between the battery case and the power generation element, so even if the battery is shocked by being dropped, the power generation element will move greatly within the battery case or will be displaced from each other. Large deformation is prevented. Therefore, it is possible to prevent the lead piece led out from the power generating element from being broken at the connection portion, and it is possible to obtain a non-aqueous electrolyte battery having excellent impact resistance, which is an excellent effect.
【００１１】また、請求項２の発明によれば、各巻回型
発電要素間の少なくとも一部が接着剤により相互に固定
されているから、電池に衝撃が加わった場合でも各発電
要素がさらにずれ難くなり、耐衝撃性がさらに向上す
る。Further, according to the second aspect of the invention, since at least a part of the winding type power generating elements is fixed to each other by an adhesive, the power generating elements are further displaced even when a shock is applied to the battery. It becomes difficult and the impact resistance is further improved.
【００１２】請求項３の発明によれば、発電要素と樹脂
フィルムとが接着剤により固定されているから、同じく
電池に衝撃が加わった場合でも発電要素と電池ケースと
がずれ難くなり、耐衝撃性が向上する。According to the third aspect of the invention, since the power generating element and the resin film are fixed by the adhesive, the power generating element and the battery case are less likely to be displaced even when a shock is applied to the battery, and the shock resistance is high. The property is improved.
【００１３】請求項４および請求項５の発明によれば、
各発電要素間のリード片の接続部分が電池ケースの外部
に露出している場合と比較して、各リード片の接続部分
が破断し難くなるとともに、酸化等の腐食を受け難いと
いう作用効果を奏する。According to the inventions of claims 4 and 5,
Compared to the case where the connecting part of the lead piece between each power generation element is exposed to the outside of the battery case, the connecting part of each lead piece is less likely to break and is less susceptible to corrosion such as oxidation. Play.
【００１４】[0014]
【発明の実施の形態】＜第１実施形態＞以下、本発明を
具体化した第１実施形態について図１ないし図４を参照
して説明する。図１は本実施形態にかかる非水電解質電
池１０の分解斜視図である。この非水電解質電池１０
は、例えば、正極と負極とがセパレータを介して巻回さ
れた３つの扁平な発電要素１１Ａ，１１Ｂ，１１Ｃを積
層させて構成される発電要素群１２と、電解質塩を含有
した図示しない非水電解液とを、可撓性を有する金属ラ
ミネート樹脂フィルムからなる電池ケース内２０に収納
してなるものである。各発電要素１１Ａ，１１Ｂ，１１
Ｃ間の長さ方向の周縁部には、くびれ部分１６が形成さ
れている。BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an exploded perspective view of a non-aqueous electrolyte battery 10 according to this embodiment. This non-aqueous electrolyte battery 10
Is, for example, a power generation element group 12 formed by stacking three flat power generation elements 11A, 11B, and 11C in which a positive electrode and a negative electrode are wound with a separator interposed therebetween, and a non-aqueous electrolyte (not shown) containing an electrolyte salt. The electrolytic solution is housed in a battery case 20 made of a flexible metal laminate resin film. Each power generation element 11A, 11B, 11
A constricted portion 16 is formed on the peripheral edge portion in the longitudinal direction between Cs.
【００１５】上記発電要素群１２は、上述したように３
つの発電要素１１Ａ，１１Ｂ，１１Ｃからなり、図１に
示すように、中央に位置する発電要素１１Ｂの長さがそ
の両側に位置する発電要素１１Ａ，１１Ｃの長さよりも
長くなるように構成されるとともに、その幅はほぼ同等
となるように構成されている。また、これら各発電要素
１１Ａ，１１Ｂ，１１Ｃは、それぞれ積層部分が図示し
ない接着剤により固定されて、積層状態が強固に保持さ
れている。また、各発電要素１１Ａ，１１Ｂ，１１Ｃか
らは、それぞれの正極および負極と電気的に接続された
厚み５０〜１００μｍの銅、アルミニウム、ニッケルな
どの金属導体からなる正極リード片１３Ａ，１３Ｂ，１
３Ｃおよび負極リード片１４Ａ，１４Ｂ，１４Ｃが一方
側に揃えて導出されている。発電要素１１Ａ，１１Ｃの
正極リード片１３Ａ，１３Ｃおよび負極リード片１４
Ａ，１４Ｃは、図中上方に延びて発電要素１１Ｂの外面
にぴったり沿うように折り曲げられており、それらの先
端部は発電要素１１Ｂの両リード片１３Ｂ，１４Ｂの基
部に電気的に接続されている。As described above, the power generation element group 12 has three elements.
As shown in FIG. 1, the power generating elements 11A, 11B and 11C are configured so that the length of the power generating element 11B located in the center is longer than the length of the power generating elements 11A and 11C located on both sides thereof. At the same time, the widths thereof are configured to be almost the same. Further, the respective power generating elements 11A, 11B and 11C have their laminated portions fixed by an adhesive agent (not shown) to firmly hold the laminated state. Further, from each of the power generating elements 11A, 11B and 11C, the positive electrode lead pieces 13A, 13B and 1 made of a metal conductor such as copper, aluminum or nickel having a thickness of 50 to 100 μm electrically connected to the positive electrode and the negative electrode.
3C and the negative electrode lead pieces 14A, 14B, 14C are led out in alignment with one side. Positive electrode lead pieces 13A, 13C and negative electrode lead piece 14 of the power generating elements 11A, 11C
A and 14C extend upward in the drawing and are bent so as to fit along the outer surface of the power generation element 11B, and their tips are electrically connected to the bases of both lead pieces 13B and 14B of the power generation element 11B. There is.
【００１６】また、発電要素１１Ｂの正極リード片１３
Ｂおよび負極リード片１４Ｂの長さ方向の中心付近に
は、酸変性ポリエチレンからなる厚さ５０μｍの接着層
が両面に設けられ、その外側に電解液バリア層として７
０μｍのエバール樹脂（クラレ製のエチレンビニルアル
コール共重合樹脂）層が設けられている（いずれも図示
せず）。Further, the positive electrode lead piece 13 of the power generating element 11B.
Adhesive layers made of acid-modified polyethylene and having a thickness of 50 μm are provided on both sides in the vicinity of the centers of B and the negative electrode lead pieces 14B in the lengthwise direction, and an adhesive layer 7 is formed outside the adhesive layers.
A 0 μm Eval resin (ethylene vinyl alcohol copolymer resin manufactured by Kuraray) layer is provided (neither is shown).
【００１７】一方、電池ケース２０は、例えば、厚さ１
２μｍのポリエチレンテレフタレート（ＰＥＴ）フィル
ム２１の内面側にバリア層として厚さ９μｍのアルミニ
ウム箔２２がウレタン系接着剤によりラミネートされた
ものであり、さらにアルミニウム箔２２の内面には熱溶
着層２３として厚さ１００μｍの酸変性ポリエチレン
（ＰＥ）層が設けられている。なお、図１中２４，２５
は熱溶着部を示している。On the other hand, the battery case 20 has, for example, a thickness of 1
An aluminum foil 22 having a thickness of 9 μm is laminated as a barrier layer on the inner surface side of a polyethylene terephthalate (PET) film 21 having a thickness of 2 μm by a urethane-based adhesive. A 100 μm thick acid-modified polyethylene (PE) layer is provided. Incidentally, 24 and 25 in FIG.
Indicates a heat welded portion.
【００１８】本実施形態の非水電解質電池１０は、次の
ようにして完成される。すなわち、まず上記電池ケース
２０の内部に上記発電要素群１２と図示しない非水電解
液とを収容するとともに、その開口部２６を正極リード
片１３Ｂおよび負極リード片１４Ｂを挟んだ状態で重ね
合わせて閉じる。この時、正極リード片１３Ｂおよび負
極リード片１４Ｂの先端部分は、電池ケース２０から導
出された状態としておく。そして、電池ケース２０の内
部を減圧した後、全体を加熱することにより熱溶着層２
３を溶融させて、発電要素１１と電池ケース２０との間
を溶着するとともに、開口部２６を溶着封口する。ま
た、この時、必要に応じて圧迫用の治具を併用してもよ
い。The non-aqueous electrolyte battery 10 of this embodiment is completed as follows. That is, first, the power generation element group 12 and a non-aqueous electrolyte solution (not shown) are housed inside the battery case 20, and the openings 26 are overlapped with the positive electrode lead piece 13B and the negative electrode lead piece 14B sandwiched therebetween. close. At this time, the tip portions of the positive electrode lead piece 13B and the negative electrode lead piece 14B are in a state of being led out from the battery case 20. Then, after decompressing the inside of the battery case 20, the whole is heated to form the heat-welding layer 2
3 is melted, the power generation element 11 and the battery case 20 are welded, and the opening 26 is welded and sealed. At this time, a pressing jig may be used together, if necessary.
【００１９】図２ないし図４は、上記発電要素群１２お
よび非水電解液を電池ケース２０の内部に収容した本実
施形態の非水電解質電池１０の完成形態を示す図であ
る。図２はその斜視図であり、この図に示すように、電
池ケース２０はその内部に収容された発電要素群１２の
外面にぴったり沿う形状とされている。特に、各発電要
素１１Ａ，１１Ｂ，１１Ｃ間のくびれ部分１６にも密着
されており、これにより、図３および図４の断面図に示
すように、電池ケース２０の内部には余分な空間が生じ
ない構成とされている。また、電池ケース２０の内面と
発電要素群１２の外面とは、上述した熱溶着層２３によ
り溶着されて、固定された状態となっている。FIGS. 2 to 4 are views showing a completed form of the non-aqueous electrolyte battery 10 of the present embodiment in which the power generation element group 12 and the non-aqueous electrolyte solution are housed inside the battery case 20. FIG. 2 is a perspective view thereof, and as shown in this figure, the battery case 20 is shaped to fit exactly on the outer surface of the power generation element group 12 housed therein. In particular, the power generation elements 11A, 11B, and 11C are also closely attached to the constricted portion 16 between them, which causes an extra space inside the battery case 20 as shown in the cross-sectional views of FIGS. 3 and 4. Not configured. In addition, the inner surface of the battery case 20 and the outer surface of the power generation element group 12 are fixed by being welded by the above-described heat welding layer 23.
【００２０】このような本実施形態の非水電解質電池１
０によれば、電池ケース２０と発電要素群１２との間に
余分な隙間が存在せず、また各発電要素１１の相互間、
および、発電要素群１２と電池ケース２０との間が、そ
れぞれ接着層および熱溶着層２３により固定された状態
となっている。従って、落下等により電池に衝撃が加わ
った場合でも、各発電要素１１の積層状態が簡単に崩れ
たり、発電要素群１２が電池ケース２０内で大きく動い
たりてしまうことが極めて起こり難くなり、リード片の
切断を防止することができるという優れた作用効果を奏
する。また、各発電要素１１が巻回型であるから、従来
の積層型ものを使用する場合と比較して、生産性に優れ
る。The non-aqueous electrolyte battery 1 of this embodiment as described above
According to 0, there is no extra gap between the battery case 20 and the power generation element group 12, and between each power generation element 11,
Also, the power generation element group 12 and the battery case 20 are fixed by an adhesive layer and a heat welding layer 23, respectively. Therefore, even if a shock is applied to the battery due to a drop or the like, it is extremely unlikely that the stacked state of the power generating elements 11 is easily broken or the power generating element group 12 is largely moved in the battery case 20. It has an excellent effect of being able to prevent cutting of one piece. In addition, since each power generation element 11 is of the wound type, the productivity is superior to the case of using the conventional laminated type.
【００２１】さらに、各発電要素１１の両リード片１
３，１４間の接続部分が電池ケース２０の内部に収容さ
れる構成であるから、接続部分がより破断し難くなると
ともに、酸化等の腐食を受け難い。Further, both lead pieces 1 of each power generation element 11
Since the connecting portion between the terminals 3 and 14 is housed inside the battery case 20, the connecting portion is more difficult to break and is less susceptible to corrosion such as oxidation.
【００２２】＜第２実施形態＞図５ないし図７は、本発
明の第２実施形態の非水電解質電池３０を示すものであ
る。本実施形態では、上記第１実施形態と同様の構成で
かつ大きさが等しい２つの発電要素３１Ａ，３１Ｂを横
に並べて発電要素群３２を構成し、この発電要素群３２
と図示しない非水電解液とを、同じく第１実施形態と同
様の構成の電池ケース４０内に密閉収容したものであ
る。また、発電要素３１Ａの正極リード片３３Ａは負極
リード片３４Ａよりも長さが長くなるように形成されて
いるとともに、発電要素３１Ｂの正極リード片３３Ｂは
負極リード片３４Ｂよりも短くなるように形成されてお
り、負極リード片３４Ａと正極リード片３３Ｂとが例え
ばニッケル板３５に溶接されることによって、発電要素
３１Ａおよび３１Ｂは電気的に直列に接続されている。
なお、このニッケル板３５は、電池ケース４０の封口部
４１内に位置するように構成されている。<Second Embodiment> FIGS. 5 to 7 show a non-aqueous electrolyte battery 30 according to a second embodiment of the present invention. In the present embodiment, two power generating elements 31A and 31B having the same structure as the first embodiment and having the same size are arranged side by side to form a power generating element group 32.
And a non-aqueous electrolyte solution (not shown) are hermetically housed in a battery case 40 having the same configuration as that of the first embodiment. Further, the positive electrode lead piece 33A of the power generation element 31A is formed to be longer than the negative electrode lead piece 34A, and the positive electrode lead piece 33B of the power generation element 31B is formed to be shorter than the negative electrode lead piece 34B. The negative electrode lead piece 34A and the positive electrode lead piece 33B are welded to the nickel plate 35, for example, so that the power generating elements 31A and 31B are electrically connected in series.
The nickel plate 35 is arranged so as to be located inside the sealing portion 41 of the battery case 40.
【００２３】本実施形態の非水電解質電池３０において
も、上記第１実施形態と同様に、各発電要素３１Ａ，３
１Ｂ間のくびれ部分３６に電池ケース４０が密着するこ
とにより、電池ケース４０と発電要素群３２との間に余
分な隙間が存在せず、また発電要素群３２と電池ケース
４０との間が熱溶着されて固定された状態となっている
から、電池に衝撃が加わった場合でもリード片が切断す
ることを防止することができる。また、本実施形態のよ
うに、電池ケース４０の封口部４１内で各リード片間の
接続を行う構成とすると、接続部分が空気に触れないだ
けでなく、電解液にも晒されないので、さらに腐食を受
け難くすることができる。Also in the non-aqueous electrolyte battery 30 of this embodiment, as in the first embodiment, each of the power generating elements 31A and 3A is used.
Since the battery case 40 is in close contact with the constricted portion 36 between 1B, no extra gap exists between the battery case 40 and the power generation element group 32, and heat is generated between the power generation element group 32 and the battery case 40. Since it is welded and fixed, it is possible to prevent the lead pieces from being cut even when a shock is applied to the battery. Further, when the lead pieces are connected in the sealing portion 41 of the battery case 40 as in the present embodiment, not only the connecting portion is not exposed to the air but also exposed to the electrolytic solution. Can be less susceptible to corrosion.
【００２４】＜第３実施形態＞図８は、本発明の第３実
施形態の非水電解質電池５０を示すものである。本実施
形態では、各発電要素５１Ａ，５１Ｂを上記第２実施形
態と同様に横に並べて発電要素群５２を構成したもので
あるが、各発電要素５１Ａ，５１Ｂ間を電気的に並列に
接続しているところが上記第２実施形態とは異なる。図
８に示すように、各発電要素５１Ａ，５１Ｂからは両リ
ード片５３，５４が互いに反対側に位置するように導出
されているとともに、発電要素５１Ａの両リード片５３
Ａ，５４Ａが長く、発電要素５１Ｂの両リード片５３
Ｂ，５４Ｂが短く構成されている。そして、それぞれ正
極リード片５３Ａ，５３Ｂ間、および負極リード片５４
Ａ，５４Ｂ間が、電池ケース６０の封口部６１におい
て、ニッケル板５５によって電気的に接続されており、
発電要素５１Ａの両リード片５３Ａ，５３Ｂだけが外部
に導出されている。なお、本実施形態においても、上記
実施形態と同様に各発電要素５１Ａ，５１Ｂ間のくびれ
部分５６に電池ケース６０が密着しており、上記実施形
態と同様の作用効果が得られる。<Third Embodiment> FIG. 8 shows a nonaqueous electrolyte battery 50 according to a third embodiment of the present invention. In the present embodiment, the power generating elements 51A and 51B are arranged side by side in the same manner as in the second embodiment to configure the power generating element group 52, but the power generating elements 51A and 51B are electrically connected in parallel. However, this is different from the second embodiment. As shown in FIG. 8, both lead pieces 53, 54 are led out from the respective power generating elements 51A, 51B so as to be located on opposite sides, and at the same time, the both lead pieces 53 of the power generating element 51A.
A and 54A are long, and both lead pieces 53 of the power generating element 51B
B and 54B are short. Then, between the positive electrode lead pieces 53A and 53B, and the negative electrode lead piece 54, respectively.
A and 54B are electrically connected by the nickel plate 55 in the sealing portion 61 of the battery case 60,
Only both lead pieces 53A and 53B of the power generation element 51A are led out. In the present embodiment as well, the battery case 60 is in close contact with the constricted portion 56 between the power generating elements 51A and 51B, similar to the above-described embodiment, and the same effect as the above-described embodiment can be obtained.
【００２５】＜第４実施形態＞図９ないし図１１は、本
発明の第４実施形態の非水電解質電池７０を示すもので
ある。本実施形態では、上記実施形態と同様の構成でか
つ大きさが等しい２つの発電要素７１Ａ，７１Ｂの一部
を積層させ、互いにずらした状態で発電要素群７２を構
成したものである。各発電要素７１Ａ，７１Ｂからは正
極および負極の各リード片７３，７４が互いに反対側に
位置するように導出されている。また、図１１に示すよ
うに、発電要素７１Ａの負極リード片７４Ａと発電要素
７１Ｂの負極リード片７４Ｂとが、厚み方向において互
いに同位置となるように配置されている。これらの負極
リード片７４Ａ，７４Ｂは、互いに近づく方向に屈曲さ
れており、電池ケース８０の内部で溶接によって電気的
に接続されるとともに、一方の負極リード片７４Ａだけ
が電池ケース８０の外部まで導出されている。また、各
正極リード片７３Ａ，７３Ｂはそれぞれ電池ケース８０
の外部に導出され、外部で接続される構成となってい
る。なお、本実施形態においても、上記実施形態と同様
に各発電要素７１Ａ，７１Ｂ間のくびれ部分７６に電池
ケース８０が密着しており、上記実施形態と同様の作用
効果が得られる。<Fourth Embodiment> FIGS. 9 to 11 show a non-aqueous electrolyte battery 70 according to a fourth embodiment of the present invention. In the present embodiment, two power generating elements 71A and 71B having the same configuration as the above embodiment and having the same size are partly stacked, and the power generating element group 72 is configured in a state of being displaced from each other. Lead pieces 73 and 74 of the positive electrode and the negative electrode are led out from the power generating elements 71A and 71B so as to be located on the opposite sides. Further, as shown in FIG. 11, the negative electrode lead piece 74A of the power generation element 71A and the negative electrode lead piece 74B of the power generation element 71B are arranged at the same position in the thickness direction. These negative electrode lead pieces 74A, 74B are bent in a direction approaching each other, and are electrically connected by welding inside the battery case 80, and only one negative electrode lead piece 74A is led out to the outside of the battery case 80. Has been done. The positive electrode lead pieces 73A and 73B are respectively attached to the battery case 80.
It is configured to be externally connected and externally connected. In the present embodiment as well, the battery case 80 is in close contact with the constricted portion 76 between the power generating elements 71A and 71B, similar to the above-described embodiment, and the same effect as the above-described embodiment can be obtained.
【００２６】＜他の実施形態＞本発明は上記記述及び図
面によって説明した実施形態に限定されるものではな
く、例えば次のような実施形態も本発明の技術的範囲に
含まれ、さらに、下記以外にも要旨を逸脱しない範囲内
で種々変更して実施することができる。<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention.
【００２７】（１）非水電解質電池の発電要素群を構成
する各発電要素の並べ方或いは個数は、上記実施形態に
限定されるものではなく、必要に応じて変更可能であ
る。また、各発電要素の電気的な接続の形態（直列ある
いは並列）や接続位置も、上記実施形態に限定されるも
のではない。(1) The arrangement or the number of the respective power generating elements constituting the power generating element group of the non-aqueous electrolyte battery is not limited to the above-mentioned embodiment, but can be changed as necessary. Further, the electrical connection form (series or parallel) and connection position of each power generation element are not limited to those in the above embodiment.
【００２８】[0028]
【発明の効果】以上のように、本発明によれば、リード
片の切断が起こり難い耐衝撃に優れる非水電解質電池を
得ることができるという優れた効果を奏する。As described above, according to the present invention, it is possible to obtain a non-aqueous electrolyte battery which is excellent in impact resistance in which cutting of lead pieces is unlikely to occur.
【図１】本発明の第１実施形態にかかる非水電解質電池
の分解斜視図FIG. 1 is an exploded perspective view of a non-aqueous electrolyte battery according to a first embodiment of the present invention.
【図２】同じく完成形態の斜視図FIG. 2 is a perspective view of the same completed form
【図３】同じく図２のＡ−Ａ断面図FIG. 3 is a sectional view taken along line AA of FIG.
【図４】同じく図２のＢ−Ｂ断面図4 is a sectional view taken along line BB of FIG.
【図５】本発明の第２実施形態にかかる非水電解質電池
の斜視図FIG. 5 is a perspective view of a non-aqueous electrolyte battery according to a second embodiment of the present invention.
【図６】同じく図５のＡ−Ａ断面図6 is a sectional view taken along line AA of FIG.
【図７】同じく図５のＢ−Ｂ断面図7 is a sectional view taken along line BB of FIG.
【図８】本発明の第３実施形態にかかる非水電解質電池
の斜視図FIG. 8 is a perspective view of a non-aqueous electrolyte battery according to a third embodiment of the present invention.
【図９】本発明の第４実施形態にかかる非水電解質電池
の斜視図FIG. 9 is a perspective view of a non-aqueous electrolyte battery according to a fourth embodiment of the present invention.
【図１０】同じく図９のＡ−Ａ断面図FIG. 10 is a sectional view taken along line AA of FIG.
【図１１】同じく図９のＢ−Ｂ断面図11 is a sectional view taken along line BB of FIG.
１０，３０，５０，７０…非水電解質電池 １１，３１，５１，７１…発電要素 １２，３２，５２，７２…発電要素群 １３，３３，５３，７３…正極リード片 １４，３４，５４，７４…負極リード片 １６，３６，５６，７６…くびれ部分 ２０，４０，６０，８０…電池ケース ２１…樹脂フィルム 10, 30, 50, 70 ... Non-aqueous electrolyte battery 11, 31, 51, 71 ... Power generation element 12, 32, 52, 72 ... Power generation element group 13, 33, 53, 73 ... Positive electrode lead pieces 14, 34, 54, 74 ... Negative electrode lead pieces 16, 36, 56, 76 ... Constricted part 20, 40, 60, 80 ... Battery case 21 ... Resin film
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5H011 AA01 CC02 CC06 CC10 DD14 5H022 AA09 BB11 CC12 CC21 EE01 EE03 EE04 5H024 CC04 CC12 DD01 DD11 EE01 EE09 5H029 AJ11 BJ03 BJ04 BJ14 CJ05 DJ02 DJ05 EJ01 EJ12 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 5H011 AA01 CC02 CC06 CC10 DD14 5H022 AA09 BB11 CC12 CC21 EE01 EE03 EE04 5H024 CC04 CC12 DD01 DD11 EE01 EE09 5H029 AJ11 BJ03 BJ04 BJ14 CJ05 DJ02 DJ05 EJ01 EJ12
Claims (5)
た電池ケース内に巻回型の発電要素を収容して密閉して
なるものにおいて、前記発電要素を前記電池ケース内に
複数個収容し、前記樹脂フィルムが前記発電要素間に形
成されるくびれ部分に入り込むように前記発電要素に密
着させたことを特徴とする非水電解質電池。1. A structure in which a winding type power generating element is housed and hermetically sealed in a battery case formed of a flexible resin film, and a plurality of the power generating elements are housed in the battery case. A non-aqueous electrolyte battery, wherein the resin film is brought into close contact with the power generating element so that the resin film enters a constricted portion formed between the power generating elements.
着剤により相互に接着されていることを特徴とする請求
項１に記載の非水電解質電池。2. The non-aqueous electrolyte battery according to claim 1, wherein at least a part of each of the power generating elements is adhered to each other with an adhesive.
着剤により接着されていることを特徴とする請求項１ま
たは２に記載の非水電解質電池。3. The non-aqueous electrolyte battery according to claim 1, wherein the power generation element and the resin film are bonded to each other with an adhesive.
前記電池ケース内において電気的に接続されていること
を特徴とする請求項１ないし３のいずれかに記載の非水
電解質電池。4. The non-aqueous electrolyte battery according to claim 1, wherein the lead pieces led out from the power generating element are electrically connected in the battery case.
端縁部を互いに積層して接着することによって封口され
ると共に、前記発電要素から導出されたリード片が前記
樹脂フィルムの前記積層部分の前記樹脂フィルム間を通
って前記電池ケース外に導出され、かつ、それらのリー
ド片は前記樹脂フィルムの前記積層部分内で他の発電要
素との間で電気的に接続されていることを特徴とする請
求項１ないし請求項４のいずれかに記載の非水電解質電
池。5. The battery case is sealed by laminating the edge portions of the resin films to each other and adhering the resin film to each other, and the lead pieces led out from the power generating element are provided on the laminated portion of the resin film. It is characterized in that it is led out to the outside of the battery case through between the resin films, and those lead pieces are electrically connected to other power generating elements in the laminated portion of the resin film. The non-aqueous electrolyte battery according to claim 1.
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|---|---|---|---|
| JP2002032104A JP3680797B2 (en) | 2002-02-08 | 2002-02-08 | Non-aqueous electrolyte battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002032104A JP3680797B2 (en) | 2002-02-08 | 2002-02-08 | Non-aqueous electrolyte battery |
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| Publication Number | Publication Date |
|---|---|
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| JP3680797B2 JP3680797B2 (en) | 2005-08-10 |
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2002
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