JP2017028189A - Power storage device - Google Patents
Power storage device Download PDFInfo
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- JP2017028189A JP2017028189A JP2015147471A JP2015147471A JP2017028189A JP 2017028189 A JP2017028189 A JP 2017028189A JP 2015147471 A JP2015147471 A JP 2015147471A JP 2015147471 A JP2015147471 A JP 2015147471A JP 2017028189 A JP2017028189 A JP 2017028189A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/124—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/74—Terminals, e.g. extensions of current collectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/121—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
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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
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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
- 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
本発明は、ラミネート外装材を用いた蓄電デバイスに関する。 The present invention relates to an electricity storage device using a laminate exterior material.
携帯通信端末機器用蓄電池、車載用蓄電池、回生エネルギー回収用蓄電池、キャパシタ、全固体電池等の電池は小型化、軽量化に伴い、従来使用されていた金属製の外装に代えて、金属箔の両面に樹脂フィルムを接着剤で貼り合わせたラミネート外装材が用いられることが多くなっている（特許文献１参照）。 Batteries such as storage batteries for mobile communication terminals, in-vehicle storage batteries, storage batteries for regenerative energy recovery, capacitors, and all solid-state batteries have become smaller and lighter. A laminate exterior material in which resin films are bonded to both surfaces with an adhesive is often used (see Patent Document 1).
特許文献１に記載されたキャパシタ用ラミネートケースは、ケース内側の樹脂フィルム層を切り欠いて金属箔を露出させて電極接続部を形成し、ケース外側の樹脂フィルム層を切り欠いて金属箔を露出させて電極端子を形成したものである。このタイプのラミネートケースはタブリードを必要としないので、キャパシタの小型軽量化を図ることができる。 In the capacitor laminate case described in Patent Document 1, the resin film layer inside the case is cut out to expose the metal foil to form an electrode connection portion, and the resin film layer outside the case is cut out to expose the metal foil. Thus, electrode terminals are formed. Since this type of laminate case does not require a tab lead, the capacitor can be reduced in size and weight.
特許文献１に記載されたキャパシタは、正極接続部をラミネートケースの一方の面に設け、負極接続部を反対側の面に設けている。このように、正極接続部と負極接続部とが立体的に配置されていると、これらへの接続部材を立体的に配置する必要があるため、キャパシタを搭載した回路は複雑化し、小型化することは難しい。 In the capacitor described in Patent Document 1, the positive electrode connection portion is provided on one surface of the laminate case, and the negative electrode connection portion is provided on the opposite surface. As described above, when the positive electrode connecting portion and the negative electrode connecting portion are three-dimensionally arranged, it is necessary to three-dimensionally arrange connection members to these, so that the circuit on which the capacitor is mounted becomes complicated and downsized. It ’s difficult.
本発明は、上述した技術背景に鑑み、接続部材をコンパクトに配置できて集電回路全体の小型化が可能な蓄電デバイスの提供を目的とする。 In view of the above-described technical background, an object of the present invention is to provide an electric storage device in which connection members can be arranged in a compact manner and the current collecting circuit can be reduced in size.
即ち、本発明は下記［１］〜［４］に記載の構成を有する。 That is, this invention has the structure as described in following [1]-[4].
［１］第一金属箔の一方の面に第一耐熱性樹脂層が積層され、他方の面に第一熱可塑性樹脂層が積層され、前記第一熱可塑性樹脂層側の面に第一金属箔に導通する第一内側導通部を有する第一外装材と、
第二金属箔の一方の面に第二耐熱性樹脂層が積層され、他方の面に第二熱可塑性樹脂層が積層され、前記第二熱可塑性樹脂層側の面に第二金属箔に導通する第二内側導通部を有する第二外装材と、
正極要素と、負極要素と、これらの間に配置されるセパレーターとを有する電池要素とを備え、
前記第一外装材の第一熱可塑性樹脂層と第二外装材の第二熱可塑性樹脂層とが向かい合い、第一熱可塑性樹脂層と第二熱可塑性樹脂層とが融着した熱封止部に囲まれることによって、室内に第一内側導通部および第二内側導通部が臨む電池要素室を有する外装体が形成され、
前記電池要素室内に電解質とともに封入された電池要素は、正極要素が第一内側導通部に導通するとともに負極要素が第二内側導通部に導通し、
前記外装体の外面において第一金属箔に導通する第一外側導通部および第二金属箔に導通する第二外側導通部を有し、かつ前記第一外側導通部と第二外側導通部とが同じ方向を向いて設けられていることを特徴とする蓄電デバイス。
[1] A first heat-resistant resin layer is laminated on one surface of the first metal foil, a first thermoplastic resin layer is laminated on the other surface, and the first metal is formed on the surface on the first thermoplastic resin layer side. A first exterior material having a first inner conducting portion conducting to the foil;
A second heat-resistant resin layer is laminated on one surface of the second metal foil, a second thermoplastic resin layer is laminated on the other surface, and the second metal foil is electrically connected to the surface on the second thermoplastic resin layer side. A second exterior material having a second inner conductive portion to be
A battery element having a positive electrode element, a negative electrode element, and a separator disposed therebetween,
The heat sealing part where the first thermoplastic resin layer of the first exterior material and the second thermoplastic resin layer of the second exterior material face each other, and the first thermoplastic resin layer and the second thermoplastic resin layer are fused. By being surrounded by, an exterior body having a battery element chamber facing the first inner conductive portion and the second inner conductive portion is formed in the room,
The battery element enclosed with the electrolyte in the battery element chamber has a positive electrode element conducting to the first inner conducting part and a negative electrode element conducting to the second inner conducting part,
A first outer conductive portion that conducts to the first metal foil and a second outer conductive portion that conducts to the second metal foil on the outer surface of the exterior body, and the first outer conductive portion and the second outer conductive portion are An electricity storage device characterized by being provided in the same direction.
［２］前記外装体は、第一外装材が熱封止部の外方に延長された第一導電用フランジと第二外装材が熱封止部の外方に延長された第二導電用フランジとを有し、前記第一導電用フランジに第一外側導通部が形成され、前記第二導電用フランジに第二外側導通部が形成されている前項１に記載の蓄電デバイス。 [2] The exterior body includes a first conductive flange in which the first exterior material is extended outward of the heat sealing portion and a second conductive material in which the second exterior material is extended outward of the heat sealing portion. The electricity storage device according to item 1, further comprising a flange, wherein a first outer conductive portion is formed on the first conductive flange, and a second outer conductive portion is formed on the second conductive flange.
［３］前記第一導電用フランジと第二導電用フランジは外装体の同一辺に熱封止部からの延長長さを変えて形成されている前項２に記載の蓄電デバイス。 [3] The electricity storage device according to item 2 above, wherein the first conductive flange and the second conductive flange are formed on the same side of the exterior body by changing the extension length from the heat sealing portion.
［４］前記第一導電用フランジと第二導電用フランジは外装体の同一辺に辺の長さを二分して形成されている前項２に記載の蓄電デバイス。 [4] The electricity storage device according to item 2, wherein the first conductive flange and the second conductive flange are formed by dividing the length of the side into the same side of the exterior body.
上記［１］に記載の蓄電デバイスは、電気の授受を行う正極側の第一外側導通部と負極側の第二外側導通部が外装体の外面において同じ方向を向いて設けられているので、これらに接続する接続部材も同じ側に配置することになる。このため、蓄電デバイスを搭載する集電用回路の構造の単純化および小型化を図ることができる。 Since the electricity storage device according to [1] is provided with the first outer conducting portion on the positive electrode side and the second outer conducting portion on the negative electrode side for transferring electricity, provided in the same direction on the outer surface of the exterior body, The connecting members connected to these are also arranged on the same side. For this reason, it is possible to simplify and miniaturize the structure of the current collecting circuit on which the power storage device is mounted.
上記［２］に記載の蓄電デバイスは、熱封止部の外方に延長した第一導電用フランジおよび第二導電用フランジに第一外側導通部および第二外側導通部が設けることで、第一外側導通部と第二外側導通部を外装体の同一面内に設けることができるので、集電用回路を立体的に拡張することなく蓄電デバイスを組み込むことができる。 In the electricity storage device according to [2], the first outer conductive portion and the second outer conductive portion are provided on the first conductive flange and the second conductive flange that extend outward from the heat sealing portion. Since the one outer conductive portion and the second outer conductive portion can be provided in the same surface of the exterior body, the power storage device can be incorporated without three-dimensionally expanding the current collecting circuit.
上記［３］に記載の蓄電デバイスは、外装体の同一辺に第一外側導通部および第二外側導通部を設けることで両者が近接しているので、集電用回路の構造のさらなる単純化および小型化を図ることができる。 In the electricity storage device according to [3] above, since the first outer conductive portion and the second outer conductive portion are provided on the same side of the exterior body so that they are close to each other, the structure of the current collecting circuit is further simplified. And size reduction can be achieved.
上記［４］に記載の蓄電デバイスは、外装体の同一辺に第一外側導通部と第二外側導通部とが辺の長さを二分して設けられているので、導通用フランジの熱封止部からの延出長さを小さくできるので、蓄電デバイスそのものを小型化でき、ひいては集電用回路を小型化することができる。 In the electricity storage device according to the above [4], the first outer conductive portion and the second outer conductive portion are provided on the same side of the exterior body by dividing the length of the side into two. Since the extension length from the stop portion can be reduced, the power storage device itself can be reduced in size, and thus the current collecting circuit can be reduced in size.
図３〜８に本発明の蓄電デバイスの６つの実施形態を示す。 6 to 8 show six embodiments of the electricity storage device of the present invention.
以下の説明において、同一符号を付した部材は同一物または同等物を表しており、重複する説明を省略する。
［外装体を構成する外装材］
図１に各蓄電デバイスの外装体を構成する第一外装材１０および第二外装材２０の積層構造および導通部の形成例を示す。
In the following description, members denoted by the same reference numerals represent the same or equivalent members, and duplicate descriptions are omitted.
[Exterior material constituting exterior body]
FIG. 1 shows a laminated structure of the first exterior material 10 and the second exterior material 20 constituting the exterior body of each power storage device and an example of forming the conductive portion.
第一外装材１０は第一金属箔１１の一方の面に接着剤層１２により第一耐熱性樹脂層１３が貼り合わされて積層され、他方の面に接着剤層１４により第一熱可塑性樹脂層１５が貼り合わされて積層されている。前記耐熱性樹脂層１３側の面に、第一耐熱性樹脂層１３および接着剤層１２が無く第一金属箔１１が露出して第一金属箔１１に導通する導通部１６が形成されている。前記第一熱可塑性樹脂層１５側の面に、第一熱可塑性樹脂層１５および接着剤層１４が無く第一金属箔１１が露出する導通部１７が形成されている。外装体において、前記第一熱可塑性樹脂層１５側の導通部１７は外装体の形態にかかわらず少なくとも一つ存在し、電極要素室内に臨む第一内側導通部となる。また、２つ目の導通部１７を有する場合は外装体外面の第一外側導通部となる。一方、第一耐熱性樹脂層１３側の導通部１６は外装体の形態によって存在する場合と存在しない場合とがあり、存在する場合は外装体の外面に形成されて第一外側導通部となる。 The first exterior material 10 is laminated by laminating a first heat-resistant resin layer 13 on one surface of the first metal foil 11 with an adhesive layer 12, and a first thermoplastic resin layer on the other surface with an adhesive layer 14. 15 are bonded and laminated. On the surface of the heat resistant resin layer 13 side, the first heat resistant resin layer 13 and the adhesive layer 12 are not formed, and the first metal foil 11 is exposed and a conducting portion 16 is formed which is electrically connected to the first metal foil 11. . On the surface on the first thermoplastic resin layer 15 side, there is formed a conducting portion 17 where the first metal foil 11 is exposed without the first thermoplastic resin layer 15 and the adhesive layer 14. In the exterior body, at least one conduction portion 17 on the first thermoplastic resin layer 15 side exists regardless of the form of the exterior body, and serves as a first inner conduction portion facing the electrode element chamber. Moreover, when it has the 2nd conduction | electrical_connection part 17, it becomes the 1st outer side conduction | electrical_connection part of an exterior body outer surface. On the other hand, the conductive portion 16 on the first heat-resistant resin layer 13 side may or may not exist depending on the form of the exterior body. If present, it is formed on the outer surface of the exterior body and becomes the first outer conductive portion. .
同様に、第二外装材２０は第二金属箔２１の一方の面に接着剤層２２により第二耐熱性樹脂層２３が貼り合わされて積層され、他方の面に接着剤層２４により第二熱可塑性樹脂層２５が貼り合わされて積層されている。前記耐熱性樹脂層２３側の面に、第二耐熱性樹脂層２３および接着剤層２２が無く第二金属箔２１が露出して第二金属箔２１に導通する導通部２６が形成されている。前記第二熱可塑性樹脂層２５側の面に、第二熱可塑性樹脂層２５および接着剤層２４が無く第二金属箔２１が露出する導通部２７が形成されている。外装体において、前記第二熱可塑性樹脂層２５側の導通部２７は外装体の形態にかかわらず少なくとも一つ存在し、電極要素室内に臨む第二内側導通部となる。また、２つ目の導通部２７を有する場合は外装体の外面の第二外側導通部となる。一方、第二耐熱性樹脂層２３側の導通部２６は外装体の形態によって存在する場合と存在しない場合とがあり、存在する場合は外装体の外面に形成されて第二外側導通部となる。 Similarly, the second exterior material 20 is laminated with the second heat-resistant resin layer 23 bonded to one surface of the second metal foil 21 with the adhesive layer 22 and the second surface with the adhesive layer 24. A plastic resin layer 25 is laminated and laminated. On the surface of the heat resistant resin layer 23 side, there is no second heat resistant resin layer 23 and an adhesive layer 22, and the second metal foil 21 is exposed and a conducting portion 26 is formed to conduct to the second metal foil 21. . On the surface of the second thermoplastic resin layer 25 side, there is formed a conducting portion 27 where the second metal foil 21 is exposed without the second thermoplastic resin layer 25 and the adhesive layer 24. In the exterior body, at least one conduction portion 27 on the second thermoplastic resin layer 25 side exists regardless of the form of the exterior body, and serves as a second inner conduction portion facing the electrode element chamber. Moreover, when it has the 2nd conduction | electrical_connection part 27, it becomes the 2nd outer side conduction | electrical_connection part of the outer surface of an exterior body. On the other hand, the conductive portion 26 on the second heat-resistant resin layer 23 side may or may not exist depending on the form of the exterior body. If present, it is formed on the outer surface of the exterior body and becomes the second outer conductive portion. .
本発明において導通部１６，１７、２６、２８は第一金属箔１１または第二金属箔２１に導通することが要件であり、第一金属箔１１または第二金属箔２１が露出していることは要件ではない。たとえば、接着剤層１２、１４、２２、２４が導電性接着剤で形成されている場合は、第一金属箔１１または第二金属箔２１上の接着剤層１２、１４、２２、２４が露出していても導通部を形成する。
［蓄電デバイス］
本発明の蓄電デバイスは、第一外装材１０の第一熱可塑性樹脂層１５と第二外装材２０の第二熱可塑性樹脂層２５とが向かい合い、第一熱可塑性樹脂層１５と第二熱可塑性樹脂層２５とが融着した熱封止部に囲まれることによって、室内に第一内側導通部および第二内側導通部が臨む電池要素室を有する外装体が形成され、電池要素室内において、電池要素の正極要素が第一内側導通部に導通するとともに負極要素が第二内側導通部に導通している。また、外装体の外面においては第一金属箔に導通する第一外側導通部および第二金属箔に導通する第二外側導通部を有している。即ち、本発明の蓄電デバイスは、第一外装材の第一金属箔が正極用導体または正極として機能するとともに第二外装材の第二金属箔が負極用導体として機能し、外装体の外面に電気の授受を行う第一外側導通部および第二外側導通部が設けられていることが共通する。以下に詳述する複数の蓄電デバイスは第一外側導通部および第二外側導通部の位置が異なる。
In the present invention, the conducting portions 16, 17, 26, and 28 are required to conduct to the first metal foil 11 or the second metal foil 21, and the first metal foil 11 or the second metal foil 21 is exposed. Is not a requirement. For example, when the adhesive layers 12, 14, 22, 24 are formed of a conductive adhesive, the adhesive layers 12, 14, 22, 24 on the first metal foil 11 or the second metal foil 21 are exposed. Even if it does, the conduction | electrical_connection part is formed.
[Power storage device]
In the electricity storage device of the present invention, the first thermoplastic resin layer 15 of the first exterior material 10 and the second thermoplastic resin layer 25 of the second exterior material 20 face each other, and the first thermoplastic resin layer 15 and the second thermoplastic resin are opposed to each other. An outer body having a battery element chamber facing the first inner conducting portion and the second inner conducting portion is formed in the room by being surrounded by the heat sealing portion to which the resin layer 25 is fused. The positive electrode element of the element is conducted to the first inner conducting portion and the negative element is conducted to the second inner conducting portion. Further, the outer surface of the exterior body has a first outer conductive portion that conducts to the first metal foil and a second outer conductive portion that conducts to the second metal foil. That is, in the electricity storage device of the present invention, the first metal foil of the first exterior material functions as a positive electrode conductor or a positive electrode, and the second metal foil of the second exterior material functions as a negative electrode conductor, on the outer surface of the exterior body. It is common that the 1st outer side conduction | electrical_connection part and 2nd outer side conduction | electrical_connection part which give and receive electricity are provided. The plurality of power storage devices described in detail below differ in the positions of the first outer conductive portion and the second outer conductive portion.
なお、図３Ｂおよび図８は、接着剤層１２、１４、２２、２４の図示を省略して第一耐熱性樹脂層１３、第二耐熱性樹脂層２３、第一金属箔１１、第二金属箔層２１、第一熱可塑性樹脂層１５、第一熱可塑性樹脂層２５のみを図示している。
（第１の蓄電デバイス）
図２〜図３Ｂに示すように、蓄電デバイス１の外装体３０は、第一外装材１０からなり平面視長方形の凹部４１を有する本体４０と、第二外装材２０からなるフラットシートの蓋体５０とにより構成され、本体４０の凹部４１に蓋体５０を被せることにより閉鎖される空間が電池要素室６０となる。
3B and 8, the illustration of the adhesive layers 12, 14, 22, and 24 is omitted, and the first heat-resistant resin layer 13, the second heat-resistant resin layer 23, the first metal foil 11, and the second metal Only the foil layer 21, the first thermoplastic resin layer 15, and the first thermoplastic resin layer 25 are shown.
(First power storage device)
As shown in FIG. 2 to FIG. 3B, the exterior body 30 of the electricity storage device 1 is a flat sheet lid body composed of a first exterior member 10 and a main body 40 having a rectangular recess 41 in plan view, and a second exterior member 20. 50, and a space that is closed by covering the concave portion 41 of the main body 40 with the lid 50 is the battery element chamber 60.
前記本体４０は、フラットシートの第一外装材１０に張り出し成形や絞り成形等の加工を施すことにより凹部４１を成形し、凹部４１の開口縁から外方にほぼ水平に延びるフランジ４２、４３、４４、４５を有している。前記凹部４１の底壁の内側、即ち第一外装材１０の第一熱可塑性樹脂層１５側の面に第一内側導通部４８が形成されている。また、４辺のうちの対向する二つのフランジ４２、４４は他の２辺のフランジ４３、４５よりも広い幅に形成され、さらに一方のフランジ４２は熱封止部６１よりも外方に延長された部分が第一導通用フランジ４６を形成している。前記第一導通用フランジ４６の第一熱可塑性樹脂層１５側の面に第一外側導通部４７が形成されている。 The main body 40 is formed with a recess 41 by applying a process such as overmolding or drawing to the first exterior member 10 of a flat sheet, and flanges 42, 43 extending substantially horizontally outward from the opening edge of the recess 41, 44, 45. A first inner conducting portion 48 is formed on the inner side of the bottom wall of the recess 41, that is, on the surface of the first exterior material 10 on the first thermoplastic resin layer 15 side. Further, two opposing flanges 42 and 44 of the four sides are formed to have a width wider than the flanges 43 and 45 of the other two sides, and one flange 42 extends outward from the heat sealing portion 61. The formed portion forms a first conduction flange 46. A first outer conducting portion 47 is formed on the surface of the first conducting flange 46 on the first thermoplastic resin layer 15 side.
前記蓋体５０は本体４０の平面寸法と同寸であり、組み立て時に電池要素室６０内において前記第一内側導通部４８に対向する位置、即ち第二外装材２０の第二熱可塑性樹脂層２５側の面に第二内側導通部５３が形成されている。また、前記蓋体５０の一方の端部が第二導通用フランジ５１となされ、外装体３０の外面である第二耐熱性樹脂層２３側の面に第二外側導通部５２が形成されている。 The lid 50 has the same size as the planar dimension of the main body 40 and is located at the position facing the first inner conducting portion 48 in the battery element chamber 60 during assembly, that is, the second thermoplastic resin layer 25 of the second exterior member 20. A second inner conducting portion 53 is formed on the side surface. One end of the lid 50 is a second conduction flange 51, and a second outer conduction portion 52 is formed on the surface of the exterior body 30 on the second heat resistant resin layer 23 side. .
図３Ａおよび図３Ｂに示すように、前記本体４０と蓋板５０とを長手方向に沿って位置をずらして外装体３０を組み立てる。組み立てた外装体３０は、凹部４１が閉塞されて電池要素室６０が形成され、電池要素室６０の周りで本体４０の第一熱可塑性樹脂層１５と蓋板５０の第二熱可塑性樹脂層２５と重なる部分が熱封止部６１となる。また、前記外装体３０は、長手方向の両端において、熱封止部６１から第一導通用フランジ４６および第二導通用フランジ５１が熱封止部６１の外方に突出し、第一外側導通部４７および第二外側導通部５２が外装体３０の外面に露出している。 As shown in FIGS. 3A and 3B, the exterior body 30 is assembled by shifting the position of the main body 40 and the cover plate 50 along the longitudinal direction. In the assembled exterior body 30, the recess 41 is closed to form the battery element chamber 60, and the first thermoplastic resin layer 15 of the main body 40 and the second thermoplastic resin layer 25 of the cover plate 50 are formed around the battery element chamber 60. The portion that overlaps with the heat seal portion 61 becomes. Further, in the exterior body 30, the first conduction flange 46 and the second conduction flange 51 protrude from the heat sealing portion 61 outward from the heat sealing portion 61 at both ends in the longitudinal direction, and the first outer conduction portion 47 and the second outer conductive portion 52 are exposed on the outer surface of the exterior body 30.
電池要素７０は、正極側金属箔７１と負極側金属箔７２との間にセパレーター７３を配置して捲回して積層した積層体である。前記正極側金属箔７１は本発明における正極要素であり、同様に負極側金属箔７２は負極要素である。 The battery element 70 is a laminate in which a separator 73 is disposed between a positive electrode side metal foil 71 and a negative electrode side metal foil 72 and wound and laminated. The positive electrode side metal foil 71 is a positive electrode element in the present invention, and similarly, the negative electrode side metal foil 72 is a negative electrode element.
蓄電デバイス１は、前記本体４０の第一内側導通部４８に導電性バインダー７４を介して電池要素７０の正極側金属箔７１の端部を接続するとともに、蓋体５０の第二内側導通部５３に導電性バインダー７４を介して負極用金属箔７２の端部を接続し、電解質を注入して電池要素室６０の周囲を熱封止して熱封止部６１を形成することにより作製される。 The power storage device 1 connects the end portion of the positive electrode side metal foil 71 of the battery element 70 to the first inner conductive portion 48 of the main body 40 via the conductive binder 74, and the second inner conductive portion 53 of the lid 50. The ends of the negative electrode metal foil 72 are connected to each other through a conductive binder 74, and an electrolyte is injected to heat-seal the periphery of the battery element chamber 60 to form a heat-sealed portion 61. .
前記蓄電デバイス１は、電池要素室６０内においては正極側金属箔７１が第一内側導通部４８で第一外装材１０の第一金属箔１１に導通し、外装体３０の外面においては第一外側導通部４７で外部との導通を得る。同様に、電池要素室６０内においては負極側金属箔７２が第二内側導通部５３で第二外装材２０の第二金属箔２１に導通し、外装体３０の外面においては第二外側導通部５２で外部との導通を得る。そして、前記蓄電デバイス１は外装体３０に設けられた第一外側導通部４７および第二外側導通部５２を通じて電気の授受を行う。正極側の第一外側導通部４７と負極側の第二外側導通部５２はいずれも蓋体５０側を向いているので、これらに接続する接続部材も同じ側に配置することになり、蓄電デバイス１を搭載する集電用回路の構造の単純化および小型化を図ることができる。しかも、第一導電用フランジ４６および第二導電用フランジ５１を形成することにより第一外側導通部４７および第二外側導通部５２を外装体３０の同一面内に設けることができるので、集電用回路を立体的に拡張することなく蓄電デバイス１を組み込むことができる。 In the battery element chamber 60, the positive electrode side metal foil 71 is electrically connected to the first metal foil 11 of the first exterior material 10 at the first inner conductive portion 48 in the battery element chamber 60, and the first is formed on the outer surface of the exterior body 30. Electrical connection with the outside is obtained by the outer conductive portion 47. Similarly, in the battery element chamber 60, the negative electrode side metal foil 72 is electrically connected to the second metal foil 21 of the second exterior member 20 by the second inner conductive portion 53, and the second outer conductive portion is formed on the outer surface of the exterior body 30. At 52, electrical connection with the outside is obtained. The electricity storage device 1 transmits and receives electricity through the first outer conductive portion 47 and the second outer conductive portion 52 provided in the exterior body 30. Since both the first outer conducting portion 47 on the positive electrode side and the second outer conducting portion 52 on the negative electrode side face the lid body 50 side, the connecting members connected to these are also arranged on the same side, and the electricity storage device 1 can be simplified and miniaturized. In addition, since the first outer conductive portion 47 and the second outer conductive portion 52 can be provided in the same plane of the exterior body 30 by forming the first conductive flange 46 and the second conductive flange 51, The electricity storage device 1 can be incorporated without expanding the circuit for use three-dimensionally.
前記蓄電デバイス１は第一外側導通部４７と第二外側導通部５２とを外装体３０の対向する辺に設けた例であるが、これらを外装体の同じ辺に設けることもできる。図４および図５に示す蓄電デバイス２、３は外装体の同じ辺に第一外側導通部および第二外側導通部を設けた例である。これらの蓄電デバイス２，３は、第一外側導通部および第二外側導通部の位置を以外は第１の蓄電デバイス１と共通であり、以下に蓄電デバイス１との相違のみを説明する。
（第２の蓄電デバイス）
図４の蓄電デバイス２において、外装体３１の蓋体５４は一つの辺の長さの１／２の領域に第二導通用フランジ５５が形成され、残りの１／２の領域は熱封止部６１が端部である。前記第二導通用フランジ５５の耐熱性樹脂層の面に第二外側導通部５６が設けられている。一方、本体８０は辺の長さの全領域に第一導通用フランジ８１が形成されて、一部８１ａは第一熱可塑性樹脂層が露出して第一熱可塑性樹脂層側の面に第一外側導通部８２が設けられている。前記第一導通用フランジ８１の残りの部分８１ｂは前記蓋体５４の第二導通用フランジ５５と重なって第一熱可塑性樹脂層と第二熱可塑性樹脂層とが熱融着している。
（第３のデバイス）
図５の蓄電デバイス３において、外装体３２の蓋体５０は図２の外装体３０の蓋体５０と同じであるが、蓋体５０の第二外側導通部５２の向きを本体８３の第一外側導通部８５の向きに対して図３Ａの蓄電体１とは逆向きに組み合わせている。前記本体８３は、第二導通用フランジ５１と同じ側の辺において第二導通用フランジ５１よりも大きく延出した第一導通用フランジ８４が形成されている。前記第一導通用フランジ８４の先端側の部分８４ａは第一熱可塑性樹脂層が露出して第一熱可塑性樹脂層側の面に第一外側導通部８５が設けられ、基端側の部分８４ｂは第二導通用フランジ５１と重なって第一熱可塑性樹脂層と第二熱可塑性樹脂層とが熱融着している。
Although the said electrical storage device 1 is the example which provided the 1st outer side conduction | electrical_connection part 47 and the 2nd outer side conduction | electrical_connection part 52 in the edge | side which the exterior body 30 opposes, these can also be provided in the same edge | side of an exterior body. The power storage devices 2 and 3 shown in FIGS. 4 and 5 are examples in which a first outer conductive portion and a second outer conductive portion are provided on the same side of the exterior body. These power storage devices 2 and 3 are common to the first power storage device 1 except for the positions of the first outer conductive portion and the second outer conductive portion, and only differences from the power storage device 1 will be described below.
(Second power storage device)
In the power storage device 2 of FIG. 4, the lid 54 of the outer package 31 has a second conduction flange 55 formed in an area that is ½ of the length of one side, and the remaining ½ area is heat sealed. The part 61 is an end part. A second outer conducting portion 56 is provided on the surface of the heat-resistant resin layer of the second conducting flange 55. On the other hand, the main body 80 has a first conduction flange 81 formed in the entire region of the side length, and a part 81a is exposed to the first thermoplastic resin layer side surface and the first thermoplastic resin layer side is exposed to the first side. An outer conduction portion 82 is provided. The remaining portion 81b of the first conduction flange 81 overlaps the second conduction flange 55 of the lid 54, and the first thermoplastic resin layer and the second thermoplastic resin layer are heat-sealed.
(Third device)
In the electricity storage device 3 of FIG. 5, the lid 50 of the exterior body 32 is the same as the lid 50 of the exterior body 30 of FIG. 2, but the direction of the second outer conductive portion 52 of the lid 50 is the first of the main body 83. The power storage unit 1 in FIG. 3A is combined in the direction opposite to the direction of the outer conductive portion 85. The main body 83 is formed with a first conduction flange 84 that extends larger than the second conduction flange 51 on the same side as the second conduction flange 51. The first thermoplastic resin layer is exposed at the distal end portion 84a of the first conducting flange 84, the first outer conductive portion 85 is provided on the surface on the first thermoplastic resin layer side, and the proximal end portion 84b. The first thermoplastic resin layer and the second thermoplastic resin layer are heat-sealed with the second conduction flange 51.
前記蓄電デバイス２、３は、第一外側導通部８２、８５と第二外側導通部５６、５２とが外装体３１、３２の同じ辺に蓋体５０側を向いて設けられており、第一外側導通部４７と第二外側導通部５２を外装体３０の対向辺に設けた蓄電デバイス１よりも両者が近接している。両者の近接により、集電用回路の構造のさらなる単純化および小型化を図ることができる。特に図５の蓄電デバイス３は第一外側導通部８２と第二外側導通部５６とが辺の長さを二分して設けられているので、導通用フランジの熱封止部６１からの延出長さを小さくできるので、蓄電デバイスそのものを小型化でき、ひいては集電用回路を小型化することができる。 In the electricity storage devices 2 and 3, the first outer conducting portions 82 and 85 and the second outer conducting portions 56 and 52 are provided on the same side of the exterior bodies 31 and 32 so as to face the lid 50 side. Both are closer than the electricity storage device 1 in which the outer conductive portion 47 and the second outer conductive portion 52 are provided on opposite sides of the exterior body 30. Due to the proximity of both, the structure of the current collecting circuit can be further simplified and miniaturized. In particular, in the electricity storage device 3 of FIG. 5, the first outer conductive portion 82 and the second outer conductive portion 56 are provided by dividing the length of the side into two, so that the conductive flange extends from the heat sealing portion 61. Since the length can be reduced, the power storage device itself can be reduced in size, and thus the current collecting circuit can be reduced in size.
さらに、本発明の蓄電デバイスはフランジ以外の部分に外側導通部を設けることもできる。図６および図７の蓄電デバイス４、５は電池要素室６０の外面に外側導通部を設けた例である。
（第４の蓄電デバイス）
図６の蓄電デバイス４において、外装体３３は、図２の外装体３０の本体４０と、蓋体５７とで構成されている。前記蓋体５７は導通用フランジを有さず、電池要素室６０と近接して、即ち熱封止部６１の内側に第二外側導通部５８が設けられている。前記第二外側導通部５８および本体４０の第一外側導通部４７は外装体３３の同じ辺に蓋体５７が存在する側を向いて設けられている。
（第５の蓄電デバイス）
図７は、蓄電デバイス５を、外装体３４の本体８６を上に蓋体９０を下にして示している。前記本体８６は電池要素室６０の外側の面、即ち第一耐熱性樹脂層側の面に第一外側導通部８７が設けられている。蓋体９０は熱封止部６１から外方に延長された第二導通用フランジ９１を有し、本体８６に対向する第二熱可塑性樹脂層側の面に第二外側導通部９２が設けられている。前記第一外側導通部８７と第二外側導通部９２とは外装体３４の側の辺に本体８６が存在する側を向いて設けられている。
Furthermore, the electricity storage device of the present invention can also be provided with an outer conducting portion in a portion other than the flange. The power storage devices 4 and 5 in FIGS. 6 and 7 are examples in which an outer conductive portion is provided on the outer surface of the battery element chamber 60.
(Fourth power storage device)
In the electricity storage device 4 of FIG. 6, the exterior body 33 is composed of a main body 40 of the exterior body 30 of FIG. 2 and a lid body 57. The lid body 57 does not have a conduction flange, and a second outer conduction portion 58 is provided in the vicinity of the battery element chamber 60, that is, inside the heat sealing portion 61. The second outer conductive portion 58 and the first outer conductive portion 47 of the main body 40 are provided on the same side of the exterior body 33 so as to face the side where the lid 57 is present.
(Fifth electricity storage device)
FIG. 7 shows the electricity storage device 5 with the main body 86 of the exterior body 34 facing up and the lid body 90 facing down. The main body 86 is provided with a first outer conducting portion 87 on the outer surface of the battery element chamber 60, that is, the surface on the first heat-resistant resin layer side. The lid 90 has a second conducting flange 91 extending outward from the heat sealing portion 61, and a second outer conducting portion 92 is provided on the surface on the second thermoplastic resin layer side facing the main body 86. ing. The first outer conductive portion 87 and the second outer conductive portion 92 are provided on the side of the exterior body 34 facing the side where the main body 86 exists.
なお、第１〜第５の蓄電デバイス１、２、３、４、５において、凹部を有する本体を第二外装材２０で作製するとともに蓋体５０を第一外装材１０で作製して、正極と負極とを逆にすることもできる。
（第６の蓄電デバイス）
本発明の蓄電デバイスは電池要素が正極用金属箔と負極用金属箔の積層体であることにも限定されない。図８の蓄電デバイス６の電極要素７５は正極及び負極の活物質層７６、７７とセパレーター７３とにより構成されている。
In the first to fifth power storage devices 1, 2, 3, 4, and 5, a main body having a recess is manufactured with the second exterior member 20 and a lid 50 is manufactured with the first exterior member 10, and the positive electrode And the negative electrode can be reversed.
(Sixth electricity storage device)
The electricity storage device of the present invention is not limited to the battery element being a laminate of a positive electrode metal foil and a negative electrode metal foil. The electrode element 75 of the electricity storage device 6 in FIG. 8 includes positive and negative active material layers 76 and 77 and a separator 73.
前記蓄電デバイス６は、外装体３５をフラットな第一外装材１０および第二外装材２０とで構成し、第一金属箔１１を正極、第二金属箔２１を負極として利用する薄型デバイスである。 The electricity storage device 6 is a thin device in which the outer package 35 is constituted by the flat first outer packaging material 10 and the second outer packaging material 20, and the first metal foil 11 is used as a positive electrode and the second metal foil 21 is used as a negative electrode. .
前記蓄電デバイス６は、第一外装材１０の第一内側導通部１００に正極活物質層７６を積層し、第二外装材２０の第二内側導通部１０１に負極活物質層７７を積層し、２つの外装材１０、２０をセパレーター７３を介して重ね、電解質とともに第一内側導通部１００および第二内側導通部１０１に周囲を熱封止することにより形成されている。図８において６３は熱封止部を示している。前記正極活物質層７６および負極活物質層７７が本発明における正極要素および負極要素に対応し、正極活物質層７６、負極活物質層７７およびセパレーター７３が電極要素７５である。前記電極要素７５が存在する空間が電池要素室６２である。 The electricity storage device 6 is formed by laminating a positive electrode active material layer 76 on the first inner conductive portion 100 of the first exterior material 10, and laminating a negative electrode active material layer 77 on the second inner conductive portion 101 of the second exterior material 20, The two exterior members 10 and 20 are overlapped via a separator 73, and the first inner conductive portion 100 and the second inner conductive portion 101 are heat sealed together with the electrolyte. In FIG. 8, reference numeral 63 denotes a heat sealing portion. The positive electrode active material layer 76 and the negative electrode active material layer 77 correspond to the positive electrode element and the negative electrode element in the present invention, and the positive electrode active material layer 76, the negative electrode active material layer 77, and the separator 73 are the electrode elements 75. A space where the electrode element 75 exists is a battery element chamber 62.
また、第一外装材１０の一辺は第一導通用フランジ１０２が形成され、前記第一導通用フランジ１０２の第一耐熱性樹脂層１３側の面に第一外側導通部１０３が設けられている。前記第一導通用フランジ１０２の対向辺には第二外装材２０が熱封止部６３から延長されて第二導通用フランジ１０４が形成され、前記第二導通用フランジ１０４の第二熱可塑性樹脂層２５層側の面に第二外側導通部１０５が設けられている。 A first conduction flange 102 is formed on one side of the first exterior material 10, and a first outer conduction portion 103 is provided on the surface of the first conduction flange 102 on the first heat-resistant resin layer 13 side. . On the opposite side of the first conduction flange 102, the second exterior member 20 is extended from the heat sealing portion 63 to form a second conduction flange 104, and the second thermoplastic resin of the second conduction flange 104 is formed. A second outer conductive portion 105 is provided on the surface of the layer 25 side.
前記蓄電デバイス６は、第一外側導通部１０３および第二外側導通部１０５が第一外装材１０が存在する側に向いて設けられているので、図２〜３Ｂの蓄電デバイス１と同じく、蓄電デバイス６を搭載する集電用回路の構造の単純化および小型化を図ることができる。 In the power storage device 6, the first outer conductive portion 103 and the second outer conductive portion 105 are provided toward the side where the first exterior material 10 is present. The structure of the current collecting circuit on which the device 6 is mounted can be simplified and downsized.
また、正極活物質層および負極活物質層を電池要素の構成要素とする薄型デバイスにおいても、図４〜７の蓄電デバイス２、３、４、５と同じく、第一外側導通部と第二外側導通部の位置を変更することができる。
［外装材の構成材料］
本発明は第一外装材１０および第二外装材２０を構成する各層の材料を限定するものではないが、好ましい材料として以下の材料を例示することができる。
Moreover, also in the thin device which uses a positive electrode active material layer and a negative electrode active material layer as a component of a battery element, like the electricity storage devices 2, 3, 4, and 5 in FIGS. The position of the conduction part can be changed.
[Constituent materials of exterior materials]
Although this invention does not limit the material of each layer which comprises the 1st exterior material 10 and the 2nd exterior material 20, the following materials can be illustrated as a preferable material.
正極側となる第一金属箔１１は軟質のアルミニウム箔が好ましく、厚さは７〜１５０μｍが好ましい。成形性やコストの点で特に３０〜８０μｍの軟質アルミニウム箔が好ましい。一方、負極側となる前記第二金属箔２１は軟質または硬質のアルミニウム箔、ステンレス箔、ニッケル箔、銅箔、チタン箔が好ましく、好ましい厚さは７〜１５０μｍであり、耐衝撃性や曲げ耐性、コストの点で１５〜１００μｍが好ましい。また、これらの金属箔としてメッキ処理箔やクラッド箔も用いることができる。さらに、これらの金属箔に化成皮膜を形成することも好ましい。 The first metal foil 11 on the positive electrode side is preferably a soft aluminum foil, and the thickness is preferably 7 to 150 μm. In terms of formability and cost, a soft aluminum foil having a thickness of 30 to 80 μm is particularly preferable. On the other hand, the second metal foil 21 on the negative electrode side is preferably a soft or hard aluminum foil, stainless steel foil, nickel foil, copper foil, or titanium foil, and preferably has a thickness of 7 to 150 μm, and has impact resistance and bending resistance. From the viewpoint of cost, 15 to 100 μm is preferable. In addition, a plated foil or a clad foil can also be used as these metal foils. Furthermore, it is also preferable to form a chemical conversion film on these metal foils.
第一耐熱性樹脂層１３および第二耐熱性樹脂層２３を構成する耐熱性樹脂としては、外装材をヒートシールする際のヒートシール温度で溶融しない耐熱性樹脂を用いる。前記耐熱性樹脂としては、第一熱可塑性樹脂層１５および第二熱可塑性樹脂層２５を構成する熱可塑性樹脂の融点より１０℃以上高い融点を有する耐熱性樹脂を用いるのが好ましく、熱可塑性樹脂の融点より２０℃以上高い融点を有する耐熱性樹脂を用いるのが特に好ましい。例えば、ポリエステルフィルムやポリアミドフィルムの他、ポリエチレンナフタレートフィルム、ポリブチレンナフタレートフィルム、ポリカーボネートフィルム等の延伸フィルムが好ましい。また、厚さは９〜５０μｍの範囲が好ましい。 As the heat-resistant resin constituting the first heat-resistant resin layer 13 and the second heat-resistant resin layer 23, a heat-resistant resin that does not melt at the heat seal temperature when heat-sealing the exterior material is used. As the heat-resistant resin, it is preferable to use a heat-resistant resin having a melting point higher by 10 ° C. than the melting point of the thermoplastic resin constituting the first thermoplastic resin layer 15 and the second thermoplastic resin layer 25, and the thermoplastic resin. It is particularly preferable to use a heat-resistant resin having a melting point that is 20 ° C. higher than the melting point. For example, stretched films such as a polyethylene naphthalate film, a polybutylene naphthalate film, and a polycarbonate film are preferable in addition to a polyester film and a polyamide film. The thickness is preferably in the range of 9 to 50 μm.
第一熱可塑性樹脂層１５および第二熱可塑性樹脂層２５を構成する熱可塑性樹脂としては、ポリエチレン、ポリプロピレン、オレフィン系共重合体、これらの酸変性物およびアイオノマーからなる群より選ばれた少なくとも１種の熱可塑性樹脂からなる未延伸フィルムが好ましく、厚さは２０〜８０μｍの範囲が好ましい。 The thermoplastic resin constituting the first thermoplastic resin layer 15 and the second thermoplastic resin layer 25 is at least one selected from the group consisting of polyethylene, polypropylene, olefin copolymers, acid-modified products thereof, and ionomers. An unstretched film made of a kind of thermoplastic resin is preferable, and the thickness is preferably in the range of 20 to 80 μm.
第一耐熱性樹脂層１３および第二耐熱性樹脂層２３側の接着剤１２、２２としては、例えば、主剤としてのポリエステル樹脂と硬化剤としての多官能イソシアネート化合物とによる二液硬化型ポリエステル−ウレタン系樹脂、あるいはポリエーテル−ウレタン系樹脂を含む接着剤を用いることが好ましい。一方、第一熱可塑性樹脂層１５および第二熱可塑性樹脂層２５側の接着剤１４、２４としては、例えば、ポリウレタン系接着剤、アクリル系接着剤、エポキシ系接着剤、ポリオレフィン系接着剤、エラストマー系接着剤、フッ素系接着剤等により形成された接着剤が挙げられる。 As the adhesives 12 and 22 on the first heat-resistant resin layer 13 and the second heat-resistant resin layer 23 side, for example, a two-component curable polyester-urethane comprising a polyester resin as a main agent and a polyfunctional isocyanate compound as a curing agent. It is preferable to use an adhesive containing a resin or a polyether-urethane resin. On the other hand, as the adhesives 14 and 24 on the first thermoplastic resin layer 15 and the second thermoplastic resin layer 25 side, for example, polyurethane adhesive, acrylic adhesive, epoxy adhesive, polyolefin adhesive, elastomer Examples thereof include adhesives formed with a system adhesive, a fluorine-based adhesive, or the like.
外装材の導通部は以下の方法で形成することができる。なお、本発明は導通部の形成方法を規定するものではなく、以下は導通部形成方法の一例にすぎない。
（１）周知の方法により、接着剤で耐熱性樹脂層、金属箔層、熱可塑性樹脂層を貼り合わせ、レーザーを照射して樹脂層および接着剤層を焼灼除去する。なお、導電性接着剤を用いて貼り合わせた外装材は樹脂層を除去すれば導通部を形成できる。
（２）金属箔に接着剤を塗布する際に導通部を形成する部分に接着剤を塗布しない未塗布部を形成し、耐熱性樹脂層または熱可塑性樹脂層樹脂層を貼り合わせる。その後、未塗布部上の樹脂層を切除する。
（３）金属箔の導通部を形成する部分にマスキングテープを貼っておき、接着剤を塗布して耐熱性樹脂層または熱可塑性樹脂層樹脂層を貼り合わせる。その後、マスキングテープとともに樹脂層および接着剤を除去する。
（４）金属箔に導電性接着剤を塗布し、導通部を形成する部分に離型紙を貼って耐熱性樹脂層または熱可塑性樹脂層樹脂層を貼り合わせる。その後、離型紙および樹脂層を除去する。
The conducting portion of the exterior material can be formed by the following method. In addition, this invention does not prescribe | regulate the formation method of a conduction | electrical_connection part, and the following is only an example of the formation method of a conduction | electrical_connection part.
(1) A heat-resistant resin layer, a metal foil layer, and a thermoplastic resin layer are bonded with an adhesive by a known method, and the resin layer and the adhesive layer are cauterized and removed by irradiation with a laser. Note that an exterior material bonded using a conductive adhesive can form a conductive portion by removing the resin layer.
(2) When an adhesive is applied to the metal foil, an uncoated portion where no adhesive is applied is formed in a portion where the conductive portion is formed, and a heat resistant resin layer or a thermoplastic resin layer resin layer is bonded. Thereafter, the resin layer on the uncoated part is cut off.
(3) A masking tape is pasted on a portion of the metal foil where the conductive portion is formed, and an adhesive is applied to bond the heat resistant resin layer or the thermoplastic resin layer resin layer together. Thereafter, the resin layer and the adhesive are removed together with the masking tape.
(4) A conductive adhesive is applied to the metal foil, and a release paper is pasted on a portion where the conductive portion is formed, and a heat resistant resin layer or a thermoplastic resin layer resin layer is bonded. Thereafter, the release paper and the resin layer are removed.
本発明は小型化、軽量化された蓄電デバイスとして好適に利用できる。 The present invention can be suitably used as a power storage device that is reduced in size and weight.
１、２、３、４、５、６…蓄電デバイス
１０…第一外装材
１１…第一金属箔
１３…第一耐熱性樹脂層
１５…第一熱可塑性樹脂層
２０…第二外装材
２１…第二金属箔
２３…第二耐熱性樹脂層
２５…第二熱可塑性樹脂層
３０、３１、３２、３３、３４、３５…外装体
４０、８０、８３、８６…本体
４６、８１、８４、１０２…第一導通用フランジ
４７、８２、８５、８７、１０３…第一外側導通部
４８、１００…第一内側導通部
５０、５４、５７、９０…蓋体
５１、５５、９１、１０４…第二導通用フランジ
５２、５６、５８、９２、１０５…第二外側導通部
５３、１０１…第二内側導通部
６０、６２…電池要素室
６１、６３…熱封止部
７０、７５…電池要素
７１…正極用金属箔（正極要素）
７２…負極用金属箔（負極要素）
７３…セパレーター
７６…正極活物質層（正極要素）
７７…負極活物質層（負極要素）
1, 2, 3, 4, 5, 6 ... power storage device 10 ... first exterior material 11 ... first metal foil 13 ... first heat resistant resin layer 15 ... first thermoplastic resin layer 20 ... second exterior material 21 ... 2nd metal foil 23 ... 2nd heat resistant resin layer 25 ... 2nd thermoplastic resin layer 30, 31, 32, 33, 34, 35 ... exterior body 40, 80, 83, 86 ... main body 46, 81, 84, 102 ... first conduction flanges 47, 82, 85, 87, 103 ... first outer conduction parts 48, 100 ... first inner conduction parts 50, 54, 57, 90 ... lid bodies 51, 55, 91, 104 ... second Conductive flanges 52, 56, 58, 92, 105 ... second outer conductive portions 53, 101 ... second inner conductive portions 60, 62 ... battery element chambers 61, 63 ... heat sealing portions 70, 75 ... battery element 71 ... Metal foil for positive electrode (positive electrode element)
72 ... Metal foil for negative electrode (negative electrode element)
73 ... Separator 76 ... Positive electrode active material layer (positive electrode element)
77 ... Negative electrode active material layer (negative electrode element)
Claims (4)
第二金属箔の一方の面に第二耐熱性樹脂層が積層され、他方の面に第二熱可塑性樹脂層が積層され、前記第二熱可塑性樹脂層側の面に第二金属箔に導通する第二内側導通部を有する第二外装材と、
正極要素と、負極要素と、これらの間に配置されるセパレーターとを有する電池要素とを備え、
前記第一外装材の第一熱可塑性樹脂層と第二外装材の第二熱可塑性樹脂層とが向かい合い、第一熱可塑性樹脂層と第二熱可塑性樹脂層とが融着した熱封止部に囲まれることによって、室内に第一内側導通部および第二内側導通部が臨む電池要素室を有する外装体が形成され、
前記電池要素室内に電解質とともに封入された電池要素は、正極要素が第一内側導通部に導通するとともに負極要素が第二内側導通部に導通し、
前記外装体の外面において第一金属箔に導通する第一外側導通部および第二金属箔に導通する第二外側導通部を有し、かつ前記第一外側導通部と第二外側導通部とが同じ方向を向いて設けられていることを特徴とする蓄電デバイス。 A first heat-resistant resin layer is laminated on one surface of the first metal foil, a first thermoplastic resin layer is laminated on the other surface, and the first metal foil is electrically connected to the surface on the first thermoplastic resin layer side. A first exterior material having a first inner conducting portion to be
A second heat-resistant resin layer is laminated on one surface of the second metal foil, a second thermoplastic resin layer is laminated on the other surface, and the second metal foil is electrically connected to the surface on the second thermoplastic resin layer side. A second exterior material having a second inner conductive portion to be
A battery element having a positive electrode element, a negative electrode element, and a separator disposed therebetween,
The heat sealing part where the first thermoplastic resin layer of the first exterior material and the second thermoplastic resin layer of the second exterior material face each other, and the first thermoplastic resin layer and the second thermoplastic resin layer are fused. By being surrounded by, an exterior body having a battery element chamber facing the first inner conductive portion and the second inner conductive portion is formed in the room,
The battery element enclosed with the electrolyte in the battery element chamber has a positive electrode element conducting to the first inner conducting part and a negative electrode element conducting to the second inner conducting part,
A first outer conductive portion that conducts to the first metal foil and a second outer conductive portion that conducts to the second metal foil on the outer surface of the exterior body, and the first outer conductive portion and the second outer conductive portion are An electricity storage device characterized by being provided in the same direction.
The power storage device according to claim 2, wherein the first conductive flange and the second conductive flange are formed by dividing the length of the side into the same side of the exterior body.
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| TW105121818A TWI692139B (en) | 2015-07-27 | 2016-07-11 | Power storage device |
| KR1020160094008A KR102556561B1 (en) | 2015-07-27 | 2016-07-25 | Storage device |
| CN201610599424.3A CN106410067A (en) | 2015-07-27 | 2016-07-26 | Electricity storage apparatus |
| CN201620796121.6U CN205992547U (en) | 2015-07-27 | 2016-07-26 | Electrical storage device |
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| JP2013161674A (en) | 2012-02-06 | 2013-08-19 | Sumitomo Electric Ind Ltd | Laminate case for electrochemical element, battery, capacitor, and electrochemical element set |
| JP6580406B2 (en) * | 2015-07-27 | 2019-09-25 | 昭和電工パッケージング株式会社 | Power storage device |
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| JP2002343681A (en) * | 2001-05-11 | 2002-11-29 | Meidensha Corp | Electric double-layer capacitor |
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