JP5966891B2 - Method for manufacturing power storage device - Google Patents

Method for manufacturing power storage device Download PDF

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JP5966891B2
JP5966891B2 JP2012262230A JP2012262230A JP5966891B2 JP 5966891 B2 JP5966891 B2 JP 5966891B2 JP 2012262230 A JP2012262230 A JP 2012262230A JP 2012262230 A JP2012262230 A JP 2012262230A JP 5966891 B2 JP5966891 B2 JP 5966891B2
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opening
exterior material
storage device
laminate
electrolytic solution
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JP2014110246A (en
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原田　裕之
裕之 原田
昌治 板谷
昌治 板谷
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Murata Manufacturing Co Ltd
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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
    • 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
    • Y02E60/13—Energy storage using capacitors
    • 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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  • Electric Double-Layer Capacitors Or The Like (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Filling, Topping-Up Batteries (AREA)

Description

本発明は、蓄電デバイスの製造方法に関する。   The present invention relates to a method for manufacturing an electricity storage device.

従来、電気二重層コンデンサや二次電池などの蓄電デバイスが種々知られている。特許文献１には、蓄電デバイスの製造に際し、外装材を、開口部が上方を向いて開口するように配し、開口部に挿入したノズルから電解液を外装材中に注入する方法が記載されている。   Conventionally, various power storage devices such as electric double layer capacitors and secondary batteries are known. Patent Document 1 describes a method of arranging an exterior material so that the opening portion is opened upward and injecting an electrolytic solution into the exterior material from a nozzle inserted into the opening portion when manufacturing the electricity storage device. ing.

特開２０１２−６４４６８号公報JP 2012-64468 A

外装材中に電解液を注入した後に、開口部をシールする必要がある。開口部をシールする方法としては、開口部をシール治具で挟んで加熱しながら押圧する方法が考えられる。開口部をシールする際に、シール治具に電解液が付着してしまうおそれがある。シール治具は、加熱されるため、シール治具を洗浄するためには、シール治具を一旦冷却する必要がある。このため、シール治具が電解液に汚染されると、煩雑なシール治具の洗浄工程が必要となり、蓄電デバイスの生産効率が低下する。   It is necessary to seal the opening after injecting the electrolyte into the exterior material. As a method for sealing the opening, a method of pressing the heating while sandwiching the opening with a sealing jig is conceivable. When sealing the opening, the electrolyte may adhere to the sealing jig. Since the sealing jig is heated, it is necessary to cool the sealing jig once in order to clean the sealing jig. For this reason, when the sealing jig is contaminated with the electrolytic solution, a complicated sealing jig cleaning step is required, and the production efficiency of the electricity storage device is reduced.

本発明の主な目的は、蓄電デバイスの製造に際し、電解液が注入された外装材をシールするときに電解液によりシール治具が汚染されないようにすることにある。   The main object of the present invention is to prevent the sealing jig from being contaminated by the electrolytic solution when sealing the exterior member into which the electrolytic solution has been injected in the manufacture of the electricity storage device.

本発明に係る蓄電デバイスの製造方法では、デバイス本体を収容している内部空間と、内部空間に連通している開口部とを有するラミネート外装材を用意する。開口部からラミネート外装材中に電解液を注入する注入工程を行う。開口部が下方に向かって開口するようにラミネート外装材を配した状態で、ラミネート外装材の開口部が設けられた部分をシール治具により挟持することによって開口部を封止する。   In the method for manufacturing an electricity storage device according to the present invention, a laminate exterior material having an internal space that accommodates a device body and an opening that communicates with the internal space is prepared. An injection step of injecting an electrolyte solution into the laminate exterior material from the opening is performed. In a state where the laminate exterior material is arranged so that the opening is opened downward, the opening is sealed by sandwiching the portion of the laminate exterior material where the opening is provided with a sealing jig.

本発明に係る蓄電デバイスの製造方法のある特定の局面では、注入工程において、ラミネート外装材の開口部が設けられた部分の先端側の一部分を電解液に浸漬させ、電解液を真空注入する。封止工程において、注入工程において、ラミネート外装材の電解液と接触していない部分をシール治具により挟持する。   In a specific aspect of the method for manufacturing an electricity storage device according to the present invention, in the injecting step, a part of the tip side of the portion provided with the opening of the laminate exterior material is immersed in the electrolytic solution, and the electrolytic solution is vacuum injected. In the sealing process, in the injecting process, a portion of the laminate exterior material that is not in contact with the electrolyte is sandwiched by a sealing jig.

本発明に係る蓄電デバイスの製造方法の別の特定の局面では、封止工程の後に、注入工程においてラミネート外装材の外表面が電解液に接触した部分を切除する工程をさらに行う。   In another specific aspect of the method for manufacturing an electricity storage device according to the present invention, after the sealing step, a step of excising a portion where the outer surface of the laminate exterior material is in contact with the electrolytic solution in the injection step is further performed.

本発明に係る蓄電デバイスの製造方法の他の特定の局面では、封止されていない開口部が下方に向かって開口するようにラミネート外装材を配した際に、電解液が開口部を経由して内部空間から流出しないような形状寸法に開口部を形成する。   In another specific aspect of the method for manufacturing an electricity storage device according to the present invention, when the laminate sheathing material is disposed so that the unsealed opening opens downward, the electrolytic solution passes through the opening. The opening is formed in a shape and dimension so as not to flow out of the internal space.

本発明によれば、蓄電デバイスの製造に際し、電解液が注入された外装材をシールするときに電解液によりシール治具が汚染されないようにすることができる。   ADVANTAGE OF THE INVENTION According to this invention, when manufacturing an electrical storage device, when sealing the exterior material in which electrolyte solution was inject | poured, a sealing jig can be prevented from being contaminated with electrolyte solution.

本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。It is a typical front view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。It is a typical front view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。It is a typical front view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。It is a typical front view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的側面図である。It is a typical side view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。It is a typical front view for demonstrating the manufacturing method of the electrical storage device in one Embodiment of this invention. 本発明の一実施形態において製造された蓄電デバイスの模式的正面図である。It is a typical front view of the electrical storage device manufactured in one Embodiment of this invention.

以下、本発明を実施した好ましい形態の一例について説明する。但し、下記の実施形態は、単なる例示である。本発明は、下記の実施形態に何ら限定されない。   Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiment is merely an example. The present invention is not limited to the following embodiments.

また、実施形態等において参照する各図面において、実質的に同一の機能を有する部材は同一の符号で参照することとする。また、実施形態等において参照する図面は、模式的に記載されたものである。図面に描画された物体の寸法の比率などは、現実の物体の寸法の比率などとは異なる場合がある。図面相互間においても、物体の寸法比率等が異なる場合がある。具体的な物体の寸法比率等は、以下の説明を参酌して判断されるべきである。   Moreover, in each drawing referred in embodiment etc., the member which has a substantially the same function shall be referred with the same code | symbol. The drawings referred to in the embodiments and the like are schematically described. A ratio of dimensions of an object drawn in a drawing may be different from a ratio of dimensions of an actual object. The dimensional ratio of the object may be different between the drawings. The specific dimensional ratio of the object should be determined in consideration of the following description.

図１〜図４は、本実施形態における蓄電デバイスの製造方法を説明するための模式的正面図である。図７は、本実施形態において製造された蓄電デバイスの模式的正面図である。本実施形態では、主として図１〜図４を参照しながら、図７に示される蓄電デバイス１の製造方法について説明する。なお、蓄電デバイス１は、例えば、電気二重層コンデンサや二次電池等を構成している。   1 to 4 are schematic front views for explaining a method for manufacturing an electricity storage device in the present embodiment. FIG. 7 is a schematic front view of the electricity storage device manufactured in the present embodiment. In the present embodiment, a method for manufacturing the electricity storage device 1 shown in FIG. 7 will be described mainly with reference to FIGS. In addition, the electrical storage device 1 comprises an electric double layer capacitor, a secondary battery, etc., for example.

まず、図１に示される、ラミネートシート１０を用意する。このラミネートシート１０は、図７に示されるラミネート外装材１１を構成するためのシートである。ラミネートシート１０は、例えば、樹脂シートや、金属層や無機酸化物層等を含む樹脂シートにより構成することができる。   First, a laminate sheet 10 shown in FIG. 1 is prepared. The laminate sheet 10 is a sheet for constituting the laminate exterior material 11 shown in FIG. The laminate sheet 10 can be composed of, for example, a resin sheet, a resin sheet including a metal layer, an inorganic oxide layer, and the like.

次に、ラミネートシート１０を二つ折りにし、間にデバイス本体１２を配置する。このデバイス本体１２は、蓄電デバイス１の機能を実質的に実現させる部材である。デバイス本体１２は、例えば、セパレータと、セパレータを介して対向している陰極及び陽極とにより構成することができる。   Next, the laminate sheet 10 is folded in half, and the device main body 12 is disposed therebetween. The device main body 12 is a member that substantially realizes the function of the power storage device 1. The device body 12 can be constituted by, for example, a separator, and a cathode and an anode facing each other with the separator interposed therebetween.

次に、図２に示されるように、ラミネートシート１０のデバイス本体１２の周囲を、一部を除いて融着させることにより、デバイス本体１２を収容している内部空間１３と、内部空間１３に連通している開口部１４とを有するラミネート外装材１１を作製する。なお、図２〜図４及び図７において、右側に向かって斜め下方に延びるハッチングが附された部分は、ラミネートシート１０の融着部を表している。   Next, as shown in FIG. 2, the periphery of the device main body 12 of the laminate sheet 10 is fused except for a part thereof, so that an inner space 13 containing the device main body 12 and an inner space 13 are formed. A laminate exterior material 11 having an opening 14 in communication is produced. In FIGS. 2 to 4 and 7, a hatched portion extending obliquely downward toward the right side represents a fused portion of the laminate sheet 10.

次に、開口部１４からラミネート外装材１１中に電解液１５（図３を参照）を注入する（注入工程）。具体的には、本実施形態では、注入工程において、ラミネート外装材１１の開口部１４が設けられた部分の先端側の部分を電解液１５に浸漬させ、電解液を真空注入する。このため、ラミネート外装材１１の開口部１４が設けられた部分の先端側の部分が、電解液と接触した電解液接触部となり、基端側の部分が、電解液と接触していない電解液非接触部となる。   Next, the electrolyte solution 15 (see FIG. 3) is injected into the laminate exterior material 11 from the opening 14 (injection step). Specifically, in the present embodiment, in the injection process, the portion on the tip side of the portion where the opening 14 of the laminate exterior material 11 is provided is immersed in the electrolytic solution 15, and the electrolytic solution is injected by vacuum. For this reason, the portion on the distal end side of the portion where the opening 14 of the laminate exterior material 11 is provided becomes an electrolytic solution contact portion in contact with the electrolytic solution, and the proximal end portion is not in contact with the electrolytic solution. It becomes a non-contact part.

ここで、「真空注入」とは、容器内を減圧した状態で、容器の開口部を液体に接触させ、その後、雰囲気の圧力を上昇させることにより、容器内に液体を注入する方法である。本実施形態では、ラミネート外装材１１を減圧した状態で、ラミネート外装材１１の開口部１４が設けられた部分の先端側の部分を電解液１５に浸漬させることにより、ラミネート外装材１１の開口部１４に電解液１５を接触させ、その後、雰囲気の圧力を上昇させることにより、ラミネート外装材１１中に電解液１５を注入する。   Here, “vacuum injection” is a method of injecting a liquid into the container by bringing the opening of the container into contact with the liquid in a state where the inside of the container is depressurized, and then increasing the pressure of the atmosphere. In the present embodiment, the opening portion of the laminate sheathing material 11 is immersed in the electrolyte solution 15 by immersing the tip side portion of the portion where the opening portion 14 of the laminate sheathing material 11 is provided in a state in which the laminate sheathing material 11 is decompressed. 14 is brought into contact with the electrolytic solution 15, and then the pressure of the atmosphere is increased, thereby injecting the electrolytic solution 15 into the laminate exterior material 11.

より具体的には、まず、ラミネート外装材１１が配された雰囲気を減圧する。その後、図３に示されるように、ラミネート外装材１１の開口部１４が設けられた部分の先端側の部分を電解液１５に浸漬することにより、開口部１４を電解液１５に接触させる。次に、ラミネート外装材１１及び電解液１５が配された雰囲気の圧力を上昇させる。以上の工程を行うことにより、ラミネート外装材１１の内部空間１３に電解液１５を注入することができる。   More specifically, first, the atmosphere in which the laminate exterior material 11 is disposed is decompressed. Thereafter, as shown in FIG. 3, the opening 14 is brought into contact with the electrolytic solution 15 by immersing the portion on the tip side of the portion where the opening 14 of the laminate exterior material 11 is provided in the electrolytic solution 15. Next, the pressure of the atmosphere in which the laminate exterior material 11 and the electrolytic solution 15 are arranged is increased. By performing the above steps, the electrolytic solution 15 can be injected into the internal space 13 of the laminate exterior material 11.

次に、開口部１４を封止する（封止工程）。開口部１４の封止は、図４及び図５に示されるように、ラミネート外装材１１の開口部１４が設けられた部分のうち、電解液に接触していない電解液非接触部を、加熱されたシール治具(シールブロック)１６により狭持することによって開口部を封止する。このため、ラミネート外装材１１の電解液接触部をシール治具１６により狭持する場合とは異なり、ラミネート外装材１１の外表面に付着した電解液がシール治具１６に付着しない。   Next, the opening 14 is sealed (sealing step). As shown in FIGS. 4 and 5, the opening 14 is sealed by heating the non-electrolytic solution non-contact portion that is not in contact with the electrolytic solution in the portion of the laminate exterior material 11 where the opening 14 is provided. The opening is sealed by being held by the sealing jig (seal block) 16. For this reason, unlike the case where the electrolyte solution contact portion of the laminate exterior material 11 is sandwiched by the sealing jig 16, the electrolyte solution attached to the outer surface of the laminate exterior material 11 does not adhere to the seal jig 16.

その後、図６に示されるように、カッティングラインＬに沿ってラミネート外装材１１を切断することにより、注入工程においてラミネート外装材１１の外表面が電解液に接触した部分を切除する。以上の工程により、図７に示される蓄電デバイス１を完成させることができる。なお、図７及び図４において、下方に向かって左側に向かって延びるハッチングは、電解液１５が注入された部分を示している。   Thereafter, as shown in FIG. 6, the laminate exterior material 11 is cut along the cutting line L, so that the portion where the outer surface of the laminate exterior material 11 is in contact with the electrolytic solution is cut out in the injection step. Through the above steps, the electricity storage device 1 shown in FIG. 7 can be completed. 7 and 4, hatching extending downward to the left indicates a portion into which the electrolytic solution 15 has been injected.

本実施形態において、封止されていない開口部１４が下方に向かって開口するようにラミネート外装材１１を配した際に、電解液１５が開口部１４を経由して内部空間１３から流出しないような形状寸法に開口部１４を形成する。そして、封止工程は、図４に示されるように、開口部１４が下方に向かって開口するように、ラミネート外装材１１を配した状態で、開口部１４を封止する。このため、開口部１４を封止する際に、電解液１５が開口部１４から噴出したとしても、シール治具１６が噴出した電解液１５により汚染されない。   In the present embodiment, when the laminate sheathing material 11 is disposed so that the unsealed opening 14 opens downward, the electrolytic solution 15 does not flow out of the internal space 13 via the opening 14. The opening 14 is formed in a suitable shape. And a sealing process seals the opening part 14 in the state which has arrange | positioned the laminate exterior material 11 so that the opening part 14 may open below as FIG. 4 shows. For this reason, even when the electrolyte solution 15 is ejected from the opening portion 14 when the opening portion 14 is sealed, it is not contaminated by the electrolyte solution 15 ejected by the sealing jig 16.

なお、封止されていない開口部１４が下方に向かって開口するようにラミネート外装材１１を配した際に、電解液１５が開口部１４を経由して内部空間１３から流出しないような開口部１４の形状寸法は、電解液１５の粘度や、ラミネート外装材１１の剛性等によって異なる。従って、開口部１４の形状寸法は、電解液１５の粘度等に応じて適宜設定することができる。   In addition, when the laminate outer packaging material 11 is disposed so that the unsealed opening 14 opens downward, the opening so that the electrolyte 15 does not flow out of the internal space 13 through the opening 14. The shape dimension of 14 varies depending on the viscosity of the electrolytic solution 15, the rigidity of the laminate exterior material 11, and the like. Therefore, the shape and dimension of the opening 14 can be appropriately set according to the viscosity of the electrolytic solution 15 and the like.

また、ノズルを開口部に挿入して電解液を注入する場合は、設けることが可能なノズルの数によって、一度に電解液を注入できる数が制限されるが、本実施形態のように、電解液１５を真空注入する場合は、多数のラミネート外装材１１に一度に電解液１５を注入することができる。よって、蓄電デバイス１を高効率に製造することができる。   In addition, when the electrolyte is injected by inserting a nozzle into the opening, the number of electrolytes that can be injected at one time is limited depending on the number of nozzles that can be provided. When the liquid 15 is vacuum-injected, the electrolytic solution 15 can be injected into a large number of laminate exterior materials 11 at a time. Therefore, the electricity storage device 1 can be manufactured with high efficiency.

１…蓄電デバイス
１０…ラミネートシート
１１…ラミネート外装材
１２…デバイス本体
１３…内部空間
１４…開口部
１５…電解液
１６…シール治具（シールブロック） DESCRIPTION OF SYMBOLS 1 ... Power storage device 10 ... Laminate sheet 11 ... Laminate exterior material 12 ... Device main body 13 ... Internal space 14 ... Opening 15 ... Electrolytic solution 16 ... Seal jig (seal block)

Claims (4)

デバイス本体を収容している内部空間と、前記内部空間に連通している開口部とを有するラミネート外装材を用意する工程と、
前記開口部から前記ラミネート外装材中に電解液を注入する注入工程と、
前記開口部が下方に向かって開口するように前記ラミネート外装材を配した状態で、前記ラミネート外装材の前記開口部が設けられた部分をシール治具により挟持することによって前記開口部を封止する工程と、
を備える、蓄電デバイスの製造方法。 Preparing a laminate exterior material having an internal space housing the device body and an opening communicating with the internal space;
An injection step of injecting an electrolytic solution into the laminate sheathing material from the opening;
In a state where the laminate exterior material is arranged so that the opening is opened downward, the opening is sealed by sandwiching a portion of the laminate exterior material provided with the opening with a sealing jig. And a process of
A method for manufacturing an electricity storage device. 前記注入工程において、前記ラミネート外装材の前記開口部が設けられた部分の先端側の一部分を前記電解液に浸漬させ、前記電解液を真空注入し、
前記封止工程において、前記注入工程において、前記ラミネート外装材の前記電解液と接触していない部分をシール治具により挟持する、請求項１に記載の蓄電デバイスの製造方法。 In the injecting step, a part on the tip side of the portion where the opening of the laminate exterior material is provided is immersed in the electrolytic solution, and the electrolytic solution is vacuum injected,
2. The method for manufacturing an electricity storage device according to claim 1, wherein in the sealing step, a portion of the laminate exterior material that is not in contact with the electrolytic solution is sandwiched by a sealing jig in the injection step. 前記封止工程の後に、前記注入工程において前記ラミネート外装材の外表面が前記電解液に接触した部分を切除する工程をさらに備える、請求項１または２に記載の蓄電デバイスの製造方法。   The manufacturing method of the electrical storage device of Claim 1 or 2 further equipped with the process of excising the part which the outer surface of the said laminate exterior material contacted the said electrolyte solution in the said injection | pouring process after the said sealing process. 封止されていない前記開口部が下方に向かって開口するように前記ラミネート外装材を配した際に、前記電解液が前記開口部を経由して前記内部空間から流出しないような形状寸法に前記開口部を形成する、請求項１〜３のいずれか一項に記載の蓄電デバイスの製造方法。   When the laminate outer packaging material is disposed so that the unsealed opening is opened downward, the shape is such that the electrolyte does not flow out of the internal space through the opening. The manufacturing method of the electrical storage device as described in any one of Claims 1-3 which forms an opening part.
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