JP4033398B2 - Battery device - Google Patents
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- JP4033398B2 JP4033398B2 JP2003338584A JP2003338584A JP4033398B2 JP 4033398 B2 JP4033398 B2 JP 4033398B2 JP 2003338584 A JP2003338584 A JP 2003338584A JP 2003338584 A JP2003338584 A JP 2003338584A JP 4033398 B2 JP4033398 B2 JP 4033398B2
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- electrode plate
- positive electrode
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- separator
- secondary battery
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- 230000004927 fusion Effects 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- -1 nickel metal hydride Chemical class 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000007774 positive electrode material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 230000037330 wrinkle prevention Effects 0.000 description 1
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- 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
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- Secondary Cells (AREA)
- Cell Separators (AREA)
Description
本発明は、例えばリチウムイオン電池、ニッカド電池、ニッケル水素電池、鉛蓄電池等の電池に関する。 The present invention relates to a battery such as a lithium ion battery, a nickel cadmium battery, a nickel metal hydride battery, and a lead storage battery.
近年のエレクトロニクス分野の発展はめざましく、電子機器の小型化、軽量化、高性能化の要求が著しい。電子機器の心臓と言われる小型二次電池には、単位体積当たり又は単位重量当たりのエネルギー密度が大きく、且つ長寿命の電池の開発が望まれている。そのような中で、携帯電話、小型ＯＡ機器、小型通信機などへのリチウムイオン二次電池の用途展開が期待されている。 The development of the electronics field in recent years is remarkable, and the demands for downsizing, weight reduction and high performance of electronic devices are remarkable. For a small secondary battery, which is said to be the heart of electronic equipment, development of a battery having a large energy density per unit volume or unit weight and having a long life is desired. Under such circumstances, application development of lithium ion secondary batteries to mobile phones, small OA devices, small communication devices and the like is expected.
従来、ハンディタイプのビデオカメラやコードレス電話や携帯電話等の電子機器等には電源供給用の種種形式の一次電池或いは二次電池が搭載されている。充電して繰り返して利用可能な二次電池をこれら電子機器等に搭載する場合には電子機器或いは充電機器等への脱着を容易にするために単数或いは複数の二次電池等を１つのケースに納めた電池装置が使用されている。この電池装置は例えば図にしない樹脂材料などからなるおおむね直方体状に形成される電池容器と電池容器内に収納される単数或いは複数の充電放電可能な二次電池からなっている。このような電池装置は電子機器等や充電用機器などに搭載するために陽極端子と陰極端子を有しており、電子機器などに接続されたときには二次電池に蓄えられた電力を陽極端子と陰極端子とから電子機器などへ供給する。 Conventionally, various types of primary batteries or secondary batteries for power supply are mounted on handheld video cameras, electronic devices such as cordless phones and mobile phones. When rechargeable and reusable secondary batteries are mounted on these electronic devices, etc., one or more secondary batteries are placed in one case in order to facilitate attachment / detachment to / from electronic devices or charging devices. The stored battery device is used. This battery device includes, for example, a battery container made of a resin material (not shown) and formed in a substantially rectangular parallelepiped shape and one or a plurality of rechargeable secondary batteries housed in the battery container. Such a battery device has an anode terminal and a cathode terminal to be mounted on an electronic device or a charging device. When the battery device is connected to the electronic device or the like, the power stored in the secondary battery is connected to the anode terminal. Supply from the cathode terminal to electronic equipment.
この二次電池は図１に示すように、正極板（１１）と負極板（１２）とをセパレータ（１３）で袋詰めして交互に重ね合わせることによって形成される。そしてこの正極板（１１）と負極板（１２）とを袋状のセパレータ（１３）からなる積層体を概ね長方体のバッテリーケースに挿入して電解液を注入するか又はポリマー電解質を正極板（１１）と負極板（１２）の間に形成することによって二次電池として機能するようにする。 As shown in FIG. 1, this secondary battery is formed by packing positive electrode plates (11) and negative electrode plates (12) with separators (13) and alternately superposing them. Then, the positive electrode plate (11) and the negative electrode plate (12) are inserted into a substantially rectangular battery case by inserting a laminate composed of a bag-shaped separator (13), or an electrolyte is injected, or a polymer electrolyte is added to the positive electrode plate. By forming between (11) and a negative electrode plate (12), it functions as a secondary battery.
この正極板（１１）としては例えば図２に示すように矩形の厚さ２０ミクロン程度のアルミニウム箔からなる集電体（２１）の両面にリチウムと遷移金属の複合酸化物例えばＬｉＶ２Ｏ５やＬｉＣｏＯ２を正極活物質（２２）として塗布したものである。また、負極板（１２）としては例えば同図に示すように矩形の厚さ１０ミクロン程度の銅箔からなる集電体（２３）の両面にリチウムをドープ、脱ドープ可能なカーボン例えばグラファイト構造を有する炭素や軟黒鉛化炭素材料等の炭素を負極活物質（２４）として塗布したものである。また、セパレータ（１３）としては例えば２５ミクロン厚の多孔性ポリエチレンフィルムやポリプロピレンフィルム等を袋状にしている。電解質（２５）としては、例えばプロピレンカーボネート、ジエチルカーボネートの混合溶媒にＬｉＰＦ６を溶解した有機電解液や前記溶媒中にＬｉＢＦ４とＬｉＮ(ＣＨ３ＳＯ２)２を溶解した後にゲル化した高分子固体電解質を使用する。 As the positive electrode plate (11), for example, as shown in FIG. 2, a composite oxide of lithium and transition metal such as LiV 2 O 5 or the like is formed on both surfaces of a current collector (21) made of aluminum foil having a rectangular thickness of about 20 microns. LiCoO 2 is applied as a positive electrode active material (22). Further, as the negative electrode plate (12), for example, as shown in the figure, a rectangular current collector (23) made of copper foil having a thickness of about 10 microns has a carbon structure, for example, a graphite structure that can be doped with lithium and dedoped. Carbon having carbon or soft graphitized carbon material is applied as a negative electrode active material (24). Further, as the separator (13), for example, a porous polyethylene film or a polypropylene film having a thickness of 25 microns is formed into a bag shape. Examples of the electrolyte (25) include an organic electrolytic solution in which LiPF 6 is dissolved in a mixed solvent of propylene carbonate and diethyl carbonate, and a polymer that is gelated after dissolving LiBF 4 and LiN (CH 3 SO 2 ) 2 in the solvent. Use a solid electrolyte.
図３は、従来の特開平７−２７２７６１号記載の袋詰めを示す例である。この従来例においてはセパレータ（１３）を正極板（１１）と負極板（１２）の間に配置するのに正極板（１１）と負極板（１２）のそれぞれを袋状にセパレータ（１３）で袋詰めしている。すなわち、正極板（１１）と負極板（１２）をセパレータ（１３）で袋詰めするのに同図に示すように正極板（１１）又は負極板（１２）を厚み方向から２枚のセパレータ（１３）フィルムで挾み込み、電極板の周囲を所定間隔おきに融着（１４）している。この融着は温度コントロールされたヒーターブロックを押し当てて行なう。そして、その結果袋詰めされた正極板（１１）と負極板（１２）を図１に示すように交互に重ね合わせることにより電池の内部要素を作製している。この袋状のセパレータ（１３）を使用したときは正極板（１１）と負極板（１２）の間に多孔性ポリプロピレンフィルム等が２枚になるので、正極板（１１）と負極板（１２）が内部ショートすることを防ぐことができる。 FIG. 3 shows an example of the conventional bag packing described in JP-A-7-272761. In this conventional example, the separator (13) is disposed between the positive electrode plate (11) and the negative electrode plate (12), and each of the positive electrode plate (11) and the negative electrode plate (12) is formed into a bag shape by the separator (13). Packed in a bag. That is, to pack the positive electrode plate (11) and the negative electrode plate (12) with the separator (13), as shown in the figure, the positive electrode plate (11) or the negative electrode plate (12) is separated from the thickness direction by two separators ( 13) The film is squeezed and fused around the electrode plate at predetermined intervals (14). This fusion is performed by pressing a temperature-controlled heater block. As a result, the positive electrode plate (11) and the negative electrode plate (12) packed in a bag are alternately stacked as shown in FIG. When this bag-shaped separator (13) is used, since there are two porous polypropylene films between the positive electrode plate (11) and the negative electrode plate (12), the positive electrode plate (11) and the negative electrode plate (12) Can prevent internal short circuit.
しかしながら、この従来技術は融着熱によってセパレータ（１３）が収縮するので２枚のセパレータ（１３）の正極板（１１）又は負極板（１２）の周囲を所定間隔おきに融着しても袋状のセパレータ（１３）表面にしわが発生していた。このしわを有する袋状のセパレータ（１３）で袋詰めにされた正極板（１１）を複数枚と負極板（１２）複数枚を図１に示すように交互に重ね合わせたときには、袋状のセパレータ（１３）のしわによって電極間の空間が大きくなること及び電極距離間隔に分布を持ってしまうために実質的に重負荷特性、低温特性、サイクル特性等が悪くなって電池性能を悪化させるという不具合があった。 However, since the separator (13) contracts due to the heat of fusion in this prior art, the bag can be obtained even if the periphery of the positive electrode plate (11) or the negative electrode plate (12) of the two separators (13) is fused at predetermined intervals. Wrinkles were generated on the surface of the separator (13). When a plurality of positive plates (11) and a plurality of negative plates (12) packed in a bag-like separator (13) having wrinkles are alternately stacked as shown in FIG. Since the space between the electrodes is increased by the wrinkles of the separator (13) and the distance between the electrodes is distributed, the heavy load characteristics, the low temperature characteristics, the cycle characteristics, etc. are substantially deteriorated and the battery performance is deteriorated. There was a bug.
本発明は、上記のような課題に鑑みてなされたものであり、セパレータのしわを無くして、重負荷特性、低温特性、サイクル特性等を良くすることを目的とする。 The present invention has been made in view of the above-described problems, and an object of the present invention is to improve the heavy load characteristics, the low temperature characteristics, the cycle characteristics, etc. by eliminating the wrinkles of the separator.
本発明は、正極板と負極板とがセパレータを介して交互に交互に対向して重ねられてなる二次電池において、少なくとも前記正極板（１１）又は負極板（１２）を２枚のセパレータ（１３）で挾むと共に２枚のセパレータ（１３）の周辺で前記正極板（１１）又は負極板（１２）の４隅を含み前記正極板（１１）又は負極板（１２）の中心線に対して軸対称となる位置を融着して袋状にしたことを特徴とする電池を提供する。また、前記正極板（１１）又は負極板（１２）の１辺を前記セパレータ（１３）から露出してリード端子に接続するようにし、セパレータから露出していない正極板（１１）又は負極板（１２）の肩部に曲率部を設けて形成したことを特徴とする電池を提供する。すなわち、融着後のセパレータのしわ発生を防止するために２枚のセパレータをフリーにしておき融着時の熱による収縮力を利用してセパレータが均一に外側方向に引っ張られるようにしたものである。また、袋詰め後のセパレータから電極がはずれないように、電極の４隅に曲率を設けると共にリード部にも融着できるようにスリットを設けた新しい電極を提供する。 The present invention provides a secondary battery in which a positive electrode plate and a negative electrode plate are alternately and alternately opposed via a separator, and at least the positive electrode plate (11) or the negative electrode plate (12) is separated into two separators ( 13) and includes four corners of the positive electrode plate (11) or the negative electrode plate (12) around the two separators (13) with respect to the center line of the positive electrode plate (11) or the negative electrode plate (12). Thus, a battery is provided in which a position that is axially symmetric is fused into a bag shape. Further, one side of the positive electrode plate (11) or the negative electrode plate (12) is exposed from the separator (13) and connected to the lead terminal, and the positive electrode plate (11) or negative electrode plate (not exposed from the separator) 12) A battery characterized in that a curvature portion is provided on the shoulder portion. That is, in order to prevent wrinkling of the separator after fusing, the two separators are made free and the separator is pulled uniformly outward using the shrinkage force caused by heat during fusing. is there. In addition, a new electrode is provided in which curvature is provided at the four corners of the electrode and slits are provided so as to be fused to the lead portion so that the electrode does not come off from the separator after packing.
以上、実施例により詳細且つ具体的に説明したように、本発明は正極板（１１）又は負極板（１２）の少なくとも一方を２枚のセパレータ（１３）で挾むと共に２枚のセパレータの正極板（１１）又は負極板（１２）の４隅を含み正極板（１１）又は負極板（１２）の中心線に対して軸対称となる４隅位置を融着して袋状にしたのでセパレータのしわ発生がなくなり、また、２枚のセパレータの融着位置を４辺の中心から極板面方向の極板から少し離れた位置にしたことによって、しわ発生防止ができると同時に工程が簡略化でき、更にまた、２枚のセパレータの融着位置を４辺の中心から極板面方向の極板から少し離れた位置と４隅にしたことによって更に確実にしわ発生防止ができ、２枚のセパレータの融着位置を４辺から極板面方向の極板から少し離れた位置でそれぞれ一定間隔にしたことによってもしわ発生防止ができ、更にまた、２枚のセパレータの融着位置を４辺の中心から極板面方向の極板から少し離れた位置と４隅にしたことによって更に確実にしわ発生防止ができ、正極板又は負極板の１辺をセパレータから露出してリード端子に接続するようにしたことで、電極の取り扱いが容易になり、また、集電効率が向上した。セパレータから露出しない正極板又は負極板の肩部に曲率を設けて形成したことでセパレータから電極が外れることを防止できたと同時にセパレータを突き破ってショートするのを防止できた。セパレータから露出する正極板又は負極板の１辺にスリットを形成したことで融着可能な部分が４辺になり本発明の目的を実現可能にした。セパレータから露出する正極板又は負極板の１辺に形成したスリット位置が対向する辺のセパレータの融着位置と対称になっているので融着時に全方向を均一に引っ張ることができしわ発生を防止できた。セパレータは正極板又は負極板のどちらかでも本発明の効果が得られることも言うまでもない。
As described above in detail with reference to the embodiments, the present invention includes at least one of the positive electrode plate (11) or the negative electrode plate (12) sandwiched between two separators (13) and the positive electrode of the two separators. Since the four corner positions including the four corners of the plate (11) or the negative electrode plate (12) and being axially symmetric with respect to the center line of the positive electrode plate (11) or the negative electrode plate (12) are fused to form a bag, Wrinkle generation is eliminated, and the fusion position of the two separators is slightly away from the electrode plate in the direction of the electrode plate surface from the center of the four sides, thereby preventing wrinkle generation and simplifying the process. In addition, it is possible to further prevent the occurrence of wrinkles by making the fusion position of the two separators at a position slightly apart from the electrode plate in the direction of the electrode plate and the four corners from the center of the four sides. fusion position of the separator from the four sides of the electrode plate surface direction Can also wrinkle prevention by the respectively predetermined intervals some distance from the plate, furthermore, a position slightly apart from the electrode plate of the electrode plate surface direction fusion position of the two separator from the center of the four sides The four corners can prevent wrinkles more reliably, and one side of the positive electrode plate or negative electrode plate is exposed from the separator and connected to the lead terminal, making it easier to handle the electrode, The current collection efficiency has been improved. Since the positive electrode plate or the negative electrode plate not exposed from the separator was formed with a curvature on the shoulder, it was possible to prevent the electrode from coming off from the separator and at the same time to prevent the separator from breaking through. By forming a slit on one side of the positive electrode plate or negative electrode plate exposed from the separator, the part that can be fused becomes four sides, and the object of the present invention can be realized. The slit position formed on one side of the positive electrode plate or negative electrode plate exposed from the separator is symmetrical with the fusion position of the separator on the opposite side, so that all directions can be pulled evenly during fusion to prevent wrinkling. did it. It goes without saying that the effect of the present invention can be obtained with either the positive electrode plate or the negative electrode plate.
以下、本発明による電池装置を実施例により詳細に説明する。
実施例１
図４は本発明による１実施例を示す図である。正極板（１１）は例えば厚さ２０ミクロンのアルミニウム箔よりなる集電体の両面にリチウムと遷移金属の複合酸化物例えばＬｉＶ２Ｏ５やＬｉＣｏＯ２を正極活物質（２２）として塗布したもので長さが略１００ｍｍ、巾が略４５ｍｍでセパレータ（１３）としては例えば３５ミクロン厚の多孔性ポリエチレンフィルムやポリプロピレンフィルム等を袋状にしたセパレータ（１３）で袋詰めされている。袋詰めは２枚の正極板（１１）よりもやや大きなセパレータで正極板（１１）を挾んで正極板の中心線に対して軸対称になる位置で４隅を融着（１４）している。または負極板（１２）は例えば厚さ１０ミクロンの銅箔集電体（２３）の両面にリチウムをドープ、脱ドープ可能なカーボン例えばグラファイト構造を有する炭素や軟黒鉛化炭素材料等の炭素を負極活物質として塗布したもので長さが略１００ｍｍ、巾が略４５ｍｍでセパレータ（１３）としては例えば２５ミクロン厚の多孔性ポリエチレンフィルムやポリプロピレンフィルム等を袋状にしたセパレータ（１３）で袋詰めされている。正極板（１１）と同様に負極板（１２）の中心線に対して軸対称になる位置で４隅を融着（１４）している。図中、（１１ａ）は正極板リード部を、（１２ａ）は負極板リード部を、（１１ｂ）は正極板活部をそして（１２ｂ）は負極板活部を、それぞれ表わす。
Hereinafter, the battery device according to the present invention will be described in detail by way of examples.
Example 1
FIG. 4 is a diagram showing an embodiment according to the present invention. The positive electrode plate (11) is obtained by applying a composite oxide of lithium and a transition metal such as LiV 2 O 5 or LiCoO 2 as a positive electrode active material (22) on both sides of a current collector made of an aluminum foil having a thickness of 20 microns, for example. The separator (13) having a length of about 100 mm and a width of about 45 mm is packed with a separator (13) in the form of, for example, a 35 micron thick porous polyethylene film or polypropylene film. In the bagging, four corners are fused (14) at positions that are axisymmetric with respect to the center line of the positive electrode plate by sandwiching the positive electrode plate (11) with a separator slightly larger than the two positive electrode plates (11). . Alternatively, the negative electrode plate (12) may be made of, for example, carbon that can be doped or dedoped with lithium on both sides of a copper foil current collector (23) having a thickness of 10 microns, such as carbon having a graphite structure or carbon such as a soft graphitized carbon material. The separator coated with the active material is approximately 100 mm in length and approximately 45 mm in width and is packed in a separator (13) made of, for example, a 25 micron thick porous polyethylene film or polypropylene film. ing. As with the positive electrode plate (11), the four corners are fused (14) at positions that are axially symmetric with respect to the center line of the negative electrode plate (12). In the figure, (11a) represents a positive electrode plate lead portion, (12a) represents a negative electrode plate lead portion, (11b) represents a positive electrode plate active portion, and (12b) represents a negative electrode plate active portion.
図９は本発明を実施可能にするために工夫した電極形状である。正極板（１１）又は負極板（１２）の１辺をセパレータ（１３）から露出してリード端子に接続するようになっており、セパレータから露出している正極板又は負極板の肩部に曲率部（１５）を設けて形成してある。また、セパレータから露出している正極板又は負極板の１辺に融着可能となるようにスリット（１６）を形成してある。さらに、セパレータから露出している正極板又は負極板の１辺に形成したスリット位置が対向する辺のセパレータの融着位置と対称になっている。
FIG. 9 shows an electrode shape devised to enable the present invention. The positive electrode plate (11) or one side of the negative electrode plate (12) exposed from the separator (13) being adapted to be connected to the lead terminals, the curvature on the shoulder portion of the positive electrode plate or negative electrode plate that are exposed from the separator A portion (15) is provided. Further, there is formed a slit (16) so as to be fused to one side of the positive electrode plate or negative electrode plate that are exposed from the separator. Furthermore, a slit position formed on one side of the positive electrode plate or negative electrode plate that are exposed from the separator is in the fusing position and symmetry of the side of the separator opposite.
実施例２
図５は、本発明による別の実施例を示す図である。融着して袋状にしたセパレータの融着（１４）位置が少なくとも４辺から極板面方向の極板から少し離れた位置になっており、例えばそれぞれの辺の中心を融着している。
実施例３
図６は、本発明による更に別の実施例を示す図である。融着して袋状にしたセパレータの融着（１４）位置が少なくとも４隅及び４辺から極板面方向の極板から少し離れた位置になっている。
実施例４
図７は、本発明によるまた更に別の実施例を示す図である。融着して袋状にしたセパレータの融着（１４）位置が少なくとも４辺から極板面方向の極板から少し離れた位置で各々の辺内で一定間隔になっている。例えば長手方向の融着部（１４）の間隔は２１ｍｍおきに２ｍｍ融着している。短手方向の融着部（１４）の間隔は２５ｍｍおきに２ｍｍ融着している。
実施例５
図８は、本発明によるまた更に別の実施例を示す図である。融着して袋状にしたセパレータの融着位置が少なくとも４隅及び４辺から極板面方向の極板から少し離れた位置で各々の辺内で一定間隔で、例えば４隅は曲率部を設けて融着しており、辺上は長手方向の融着部（１４）の間隔は２１ｍｍおきに２ｍｍ融着している。短手方向の融着部（１４）の間隔は２５ｍｍおきに２ｍｍ融着している。
Example 2
FIG. 5 is a diagram showing another embodiment according to the present invention. The fused (14) position of the separator that has been fused to form a bag is at a position slightly separated from the electrode plate in the electrode plate surface direction from at least four sides, for example, the center of each side is fused. .
Example 3
FIG. 6 shows still another embodiment according to the present invention. The fused (14) position of the separator formed into a bag shape by fusion is a position slightly away from the electrode plate in the electrode plate surface direction from at least four corners and four sides.
Example 4
FIG. 7 is a view showing still another embodiment according to the present invention. The fused (14) positions of the fused and bag-like separators are at regular intervals within each side at a position slightly separated from the electrode plate in the electrode plate surface direction from at least four sides. For example, the interval between the fusion parts (14) in the longitudinal direction is 2 mm every 21 mm. The interval between the fusion portions (14) in the short direction is fused by 2 mm every 25 mm.
Example 5
FIG. 8 is a view showing still another embodiment according to the present invention. The fusion position of the separator that has been fused to form a bag is at a certain distance from each of the electrodes in the electrode plate surface direction at least at the four corners and four sides at regular intervals within each side. For example, the four corners have curvature portions. It is provided and welded, and on the side, the distance between the fusion parts (14) in the longitudinal direction is fused by 2 mm every 21 mm. The interval between the fusion portions (14) in the short direction is fused by 2 mm every 25 mm.
本発明はリチウムイオン二次電池に適用した例に関して説明をしてきたが、その他の電池に適用可能であることは言うまでもない。また、融着間隔は２１ｍｍ或いは２５ｍｍで２ｍｍ融着することを述べたが必要に応じた間隔でよい。 Although the present invention has been described with respect to an example applied to a lithium ion secondary battery, it goes without saying that the present invention is applicable to other batteries. In addition, it has been described that the fusion interval is 21 mm or 25 mm and the fusion interval is 2 mm, but may be an interval as required.
１１ 正極板
１１ａ 正極板リード部
１１ｂ 正極板活部
１２ 負極板
１２ａ 負極板リード部
１２ｂ 負極板活部
１３ セパレータ
１４ 融着部
１５ 曲率部
１６ スリット
２１ Ａｌ集電体
２２ 正極活物質
２３ Ｃｕ集電体
２４ 負極活物質
２５ 電解質
DESCRIPTION OF
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| JP2003338584A JP4033398B2 (en) | 2003-09-29 | 2003-09-29 | Battery device |
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| JP2003338584A JP4033398B2 (en) | 2003-09-29 | 2003-09-29 | Battery device |
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| JP35463796A Division JP3511443B2 (en) | 1996-12-20 | 1996-12-20 | Battery device |
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| JP2004014528A JP2004014528A (en) | 2004-01-15 |
| JP4033398B2 true JP4033398B2 (en) | 2008-01-16 |
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| JP2003338584A Expired - Fee Related JP4033398B2 (en) | 2003-09-29 | 2003-09-29 | Battery device |
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| EP4024554A1 (en) * | 2021-01-05 | 2022-07-06 | Prime Planet Energy & Solutions, Inc. | Nonaqueous electrolyte secondary battery |
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| JP4713373B2 (en) * | 2006-03-10 | 2011-06-29 | リッセル株式会社 | Lithium ion battery and method and apparatus for manufacturing the same |
| JP4945189B2 (en) * | 2006-08-04 | 2012-06-06 | 株式会社東芝 | Electrode manufacturing method |
| JP4422166B2 (en) * | 2007-03-29 | 2010-02-24 | シャープ株式会社 | Nonaqueous electrolyte secondary battery and manufacturing method thereof |
| JP5317195B2 (en) * | 2009-06-26 | 2013-10-16 | 日立マクセル株式会社 | Coin-type secondary battery |
| US8486160B2 (en) * | 2009-12-17 | 2013-07-16 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| JP5586044B2 (en) | 2010-02-10 | 2014-09-10 | Ｎｅｃエナジーデバイス株式会社 | Multilayer secondary battery |
| JP5473063B2 (en) * | 2010-03-08 | 2014-04-16 | 日立マクセル株式会社 | Flat non-aqueous secondary battery and manufacturing method thereof |
| JP5101655B2 (en) * | 2010-05-06 | 2012-12-19 | 三菱重工業株式会社 | battery |
| JP2013098142A (en) * | 2011-11-07 | 2013-05-20 | Sumitomo Electric Ind Ltd | Molten salt battery |
| JP6131557B2 (en) * | 2012-10-05 | 2017-05-24 | 株式会社豊田自動織機 | Lithium ion secondary battery |
| KR20240139091A (en) * | 2013-11-28 | 2024-09-20 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Power storage device |
| JP6724342B2 (en) * | 2015-11-13 | 2020-07-15 | 日本電気株式会社 | Battery separator, battery having the separator, method for manufacturing the separator, and method for manufacturing the battery |
| JP6819183B2 (en) * | 2016-09-26 | 2021-01-27 | 株式会社豊田自動織機 | Manufacturing method of electrode assembly |
| DE102018206036A1 (en) * | 2018-04-20 | 2019-10-24 | Robert Bosch Gmbh | Method for producing a battery element for a battery cell and use |
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| JPS6180751A (en) * | 1984-09-28 | 1986-04-24 | Matsushita Electric Ind Co Ltd | Lead storage battery |
| JP2742804B2 (en) * | 1988-12-20 | 1998-04-22 | 松下電器産業株式会社 | Lead storage battery |
| JPH02223153A (en) * | 1989-02-23 | 1990-09-05 | Yuasa Battery Co Ltd | Electrode plate for alkaline storage battery |
| JP2814665B2 (en) * | 1990-03-15 | 1998-10-27 | 松下電器産業株式会社 | Organic electrolyte battery |
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| JP3511443B2 (en) * | 1996-12-20 | 2004-03-29 | 株式会社リコー | Battery device |
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| EP4024554A1 (en) * | 2021-01-05 | 2022-07-06 | Prime Planet Energy & Solutions, Inc. | Nonaqueous electrolyte secondary battery |
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