JP6873496B2 - Sealed batteries and assembled batteries - Google Patents

Sealed batteries and assembled batteries Download PDF

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JP6873496B2
JP6873496B2 JP2019144657A JP2019144657A JP6873496B2 JP 6873496 B2 JP6873496 B2 JP 6873496B2 JP 2019144657 A JP2019144657 A JP 2019144657A JP 2019144657 A JP2019144657 A JP 2019144657A JP 6873496 B2 JP6873496 B2 JP 6873496B2
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negative electrode
positive electrode
external connection
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power generation
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JP2019204796A (en
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桂輔 澤西
桂輔 澤西
秀幸 杉山
秀幸 杉山
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Eliiy Power 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
    • 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)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Description

本発明は、密閉型電池及び組電池に関する。 The present invention relates to a sealed battery and an assembled battery.

近年、電池は、様々な用途に用いられ、特に大容量の電池は、電気自動車用電源や電力貯蔵などの用途に用いられている。
電池を単電池で使用すると、機器が必要とする電圧よりも電池の電圧が低い場合がある。このような場合、複数の電池を直列に接続し供給電圧を所望の電圧まで高くする必要がある。また、単電池では機器が必要とする電気量を十分に供給できない場合がある。このような場合、複数の電池を並列に接続し供給電気量を所望の量まで大きくする必要がある。 In recent years, batteries have been used for various purposes, and in particular, large-capacity batteries have been used for applications such as power sources for electric vehicles and power storage.
When a battery is used as a cell, the voltage of the battery may be lower than the voltage required by the device. In such a case, it is necessary to connect a plurality of batteries in series to raise the supply voltage to a desired voltage. In addition, a single battery may not be able to supply a sufficient amount of electricity required by the device. In such a case, it is necessary to connect a plurality of batteries in parallel to increase the amount of supplied electricity to a desired amount.

このため、複数の電池を直列又は並列に接続した電池ボックスや組電池を設け、これらから機器に電力を供給している。特に移動体や蓄電用などの電池では、要求される電圧・容量が大きい、また、単電池に交換可能な部品としての取り扱いが要求される。このため、これらの要求を満たす組電池が求められている。
複数の電池を直列又は並列に接続する方法として、バスバーにより外部端子を接続する方法（例えば、特許文献１参照）や、折り曲げた電極端子を溶接する方法（例えば、特許文献２参照）などが知られている。また、電極端子を折り曲げた電池を電池パックに実装することが知られている（例えば、特許文献３参照）。 For this reason, a battery box or an assembled battery in which a plurality of batteries are connected in series or in parallel is provided, and power is supplied to the device from these. In particular, batteries for mobile bodies and storage batteries are required to have a large required voltage and capacity, and are required to be handled as replaceable parts for single batteries. Therefore, there is a demand for an assembled battery that meets these requirements.
As a method of connecting a plurality of batteries in series or in parallel, a method of connecting external terminals by a bus bar (see, for example, Patent Document 1) and a method of welding bent electrode terminals (for example, see Patent Document 2) are known. Has been done. Further, it is known that a battery having bent electrode terminals is mounted on a battery pack (see, for example, Patent Document 3).

特開２０１４−１３５２０４号公報Japanese Unexamined Patent Publication No. 2014-135204 特開２０１３−２３９２９３号公報Japanese Unexamined Patent Publication No. 2013-239293 特開２０１２−０７４３８７号公報Japanese Unexamined Patent Publication No. 2012-074387

しかし、複数の電池をバスバーにより接続すると、バスバーのためのスペースが必要となり電池の小型化を阻害する場合がある。また、バスバーを絶縁する必要があり部品数が増加するという問題がある。また、電極端子を折り曲げて複数の電池を組み合わせる従来の組電池では、電池間の端子部を絶縁する部材を設ける必要があり、製造工程が複雑になる。
本発明は、このような事情に鑑みてなされたものであり、電極端子の外部接続部の位置を変えることができ、かつ、低コストでリーク電流が流れることを防止することができる密閉型電池を提供する。 However, when a plurality of batteries are connected by a bus bar, a space for the bus bar is required, which may hinder the miniaturization of the batteries. Further, there is a problem that the bus bar needs to be insulated and the number of parts increases. Further, in the conventional assembled battery in which the electrode terminals are bent to combine a plurality of batteries, it is necessary to provide a member for insulating the terminal portions between the batteries, which complicates the manufacturing process.
The present invention has been made in view of such circumstances, and is a sealed battery capable of changing the position of the external connection portion of the electrode terminal and preventing leakage current from flowing at low cost. I will provide a.

本発明は、電極シート及びセパレータを含む発電要素と、前記発電要素を挟むように設けられたラミネートフィルムと、前記電極シートに接続する電極接続端子と、電解質とを備え、前記ラミネートフィルムは、前記ラミネートフィルムを重ねて溶着した溶着部と、前記電極接続端子を前記ラミネートフィルムで挟んで溶着した第１封止部とにより密封された発電要素収容部を形成し、前記発電要素及び前記電解質は、前記発電要素収容部内に収容され、前記電極接続端子は、外部接続するための外部接続部と、前記外部接続部と第１封止部との間に設けられた導電部とを有し、前記導電部は、前記ラミネートフィルムにより非接着で覆われることを特徴とする密閉型電池を提供する。 The present invention comprises a power generation element including an electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, an electrode connection terminal connected to the electrode sheet, and an electrolyte. A power generation element accommodating portion is formed by a welded portion in which laminated films are laminated and welded, and a first sealing portion in which the electrode connection terminal is sandwiched between the laminated films and welded. The electrode connection terminal is housed in the power generation element accommodating portion, and has an external connection portion for external connection and a conductive portion provided between the external connection portion and the first sealing portion. The conductive portion provides a sealed battery characterized in that it is covered with the laminated film in a non-adhesive manner.

本発明の密閉型電池は、電極シート及びセパレータを含む発電要素と、発電要素を挟むように設けられたラミネートフィルムと、電解質とを備え、ラミネートフィルムは、ラミネートフィルムを重ねて溶着した溶着部と、電極接続端子をラミネートフィルムで挟んで溶着した第１封止部とにより密封された発電要素収容部を形成し、発電要素及び電解質は、発電要素収容部内に収容されるため、発電要素において安定して電池反応を進行させることができる。
本発明の密閉型電池は電極シートに接続する電極接続端子を備え、電極接続端子は外部接続するための外部接続部を有するため、電池の放電や充電を行うことができる。 The sealed battery of the present invention includes a power generation element including an electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, and an electrolyte. , The electrode connection terminal is sandwiched between the laminated films to form a sealed power generation element accommodating portion with the first sealing portion, and the power generation element and the electrolyte are accommodated in the power generation element accommodating portion, so that the power generation element is stable. The battery reaction can proceed.
Since the sealed battery of the present invention includes an electrode connection terminal for connecting to an electrode sheet, and the electrode connection terminal has an external connection portion for external connection, the battery can be discharged or charged.

電極接続端子は外部接続部と第１封止部との間に設けられた導電部を有するため、導電部を折り曲げることができ、外部接続部の位置を変えることができる。このことにより、機器の接続部に合わせて外部接続部の位置を変えることや、組電池の接続部の位置に合わせて外部接続部の位置を変えることが可能になる。このことにより、小型化された組電池などを作製することが可能になる。
導電部はラミネートフィルムにより非接着で覆われるため、ラミネートフィルムにより導電部を絶縁することができ、リーク電流が流れることを防止することができる。また、発電要素収容部と同じラミネートフィルムにより導電部を覆うことにより、電池の部品数を少なくすることができ、製造コストを低減することができる。また、導電部とラミネートフィルムとを非接着とすることにより、導電部を容易に折り曲げることが可能になり加工性が向上する。また、導電部を折り曲げることにより第１封止部の封止性能が低下することを抑制することができる。 Since the electrode connection terminal has a conductive portion provided between the external connection portion and the first sealing portion, the conductive portion can be bent and the position of the external connection portion can be changed. This makes it possible to change the position of the external connection portion according to the connection portion of the device and to change the position of the external connection portion according to the position of the connection portion of the assembled battery. This makes it possible to manufacture a miniaturized assembled battery or the like.
Since the conductive portion is covered with the laminated film without adhesion, the conductive portion can be insulated by the laminated film, and leakage current can be prevented from flowing. Further, by covering the conductive portion with the same laminated film as the power generation element accommodating portion, the number of battery parts can be reduced and the manufacturing cost can be reduced. Further, by making the conductive portion and the laminated film non-adhesive, the conductive portion can be easily bent and the workability is improved. Further, it is possible to prevent the sealing performance of the first sealing portion from being deteriorated by bending the conductive portion.

本発明の一実施形態の密閉型電池の概略斜視図である。It is a schematic perspective view of the closed type battery of one Embodiment of this invention. 本発明の一実施形態の密閉型電池の概略断面図である。It is the schematic sectional drawing of the closed type battery of one Embodiment of this invention. 本発明の一実施形態の密閉型電池の概略断面図である。It is the schematic sectional drawing of the closed type battery of one Embodiment of this invention. 本発明の一実施形態の密閉型電池の概略断面図である。It is the schematic sectional drawing of the closed type battery of one Embodiment of this invention. 図２又は図３の一点鎖線Ａ−Ａにおける密閉型電池の概略断面図である。2 is a schematic cross-sectional view of the sealed battery in the alternate long and short dash line AA of FIG. 2 or FIG. 本発明の一実施形態の密閉型電池に含まれる折り曲げ部の概略断面図である。It is the schematic sectional drawing of the bent part included in the closed type battery of one Embodiment of this invention. （ａ）〜（ｅ）は、本発明の一実施形態の密閉型電池の概略斜視図である。(A) to (e) are schematic perspective views of the sealed battery of one embodiment of the present invention. （ａ）〜（ｅ）は、本発明の一実施形態の組電池の概略上面図である。(A) to (e) are schematic top views of the assembled battery of one embodiment of the present invention. （ａ）〜（ｃ）は、本発明の一実施形態の組電池の概略上面図である。(A) to (c) are schematic top views of the assembled battery of one embodiment of the present invention.

本発明の密閉型電池は、電極シート及びセパレータを含む発電要素と、前記発電要素を挟むように設けられたラミネートフィルムと、前記電極シートに接続する電極接続端子と、電解質とを備え、前記ラミネートフィルムは、前記ラミネートフィルムを重ねて溶着した溶着部と、前記電極接続端子を前記ラミネートフィルムで挟んで溶着した第１封止部とにより密封された発電要素収容部を形成し、前記発電要素及び前記電解質は、前記発電要素収容部内に収容され、前記電極接続端子は、外部接続するための外部接続部と、前記外部接続部と第１封止部との間に設けられた導電部とを有し、前記導電部は、前記ラミネートフィルムにより非接着で覆われることを特徴とする。 The sealed battery of the present invention includes a power generation element including an electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, an electrode connection terminal connected to the electrode sheet, and an electrolyte. The film forms a power generation element accommodating portion sealed by a welded portion in which the laminated films are laminated and welded, and a first sealing portion in which the electrode connection terminal is sandwiched between the laminated films and welded. The electrolyte is housed in the power generation element accommodating portion, and the electrode connection terminal has an external connection portion for external connection and a conductive portion provided between the external connection portion and the first sealing portion. It is characterized in that the conductive portion is covered with the laminated film in a non-adhesive manner.

本発明の密閉型電池において、ラミネートフィルムは、電極接続端子をラミネートフィルムで挟んで溶着した第２封止部と、前記溶着部と、第１封止部とにより密封された導電部収容部を形成し、第２封止部は、導電部と外部接続部との間に設けられ、導電部は導電部収容部内に収容されたことが好ましい。
このような構成によれば、導電部が剥き出しになることを防止することができ、密閉型電池の安全性を向上させることができる。また、第１封止部の封止性能が低下した場合でも電解質が漏洩することを防止することができ、密閉型電池の安全性を向上させることができる。
本発明の密閉型電池において、電極シートは、正極シートと負極シートとを含み、電極接続端子は、正極シートに接続する正極接続端子と、負極シートに接続する負極接続端子とを含み、第１封止部は、正極接続端子をラミネートフィルムで挟んで溶着した第１正極封止部と、負極接続端子をラミネートフィルムで挟んで溶着した第１負極封止部とを含み、正極接続端子は、外部接続するための正極外部接続部と、正極外部接続部と第１正極封止部との間に設けられた正極導電部とを有し、負極接続端子は、外部接続するための負極外部接続部と、負極外部接続部と第１負極封止部との間に設けられた負極導電部とを有し、正極導電部又は負極導電部は、ラミネートフィルムにより非接着で覆われることが好ましい。
このような構成によれば、正極導電部又は負極導電部におけるリーク電流を抑制することができる。また、正極導電部とラミネートフィルムとを非接着とし、負極導電部とラミネートフィルムとを非接着とすることにより、正極導電部又は負極導電部を容易に折り曲げることが可能になる。また、正極導電部又は負極導電部を折り曲げることにより第１正極封止部又は第１負極封止部の封止性能が低下することを抑制することができる。 In the sealed battery of the present invention, the laminated film has a second sealing portion welded by sandwiching an electrode connection terminal between the laminated films, and a conductive portion accommodating portion sealed by the welded portion and the first sealing portion. It is preferable that the second sealing portion is formed and provided between the conductive portion and the external connecting portion, and the conductive portion is housed in the conductive portion accommodating portion.
According to such a configuration, it is possible to prevent the conductive portion from being exposed, and it is possible to improve the safety of the sealed battery. Further, even when the sealing performance of the first sealing portion is deteriorated, it is possible to prevent the electrolyte from leaking, and it is possible to improve the safety of the sealed battery.
In the sealed battery of the present invention, the electrode sheet includes a positive electrode sheet and a negative electrode sheet, and the electrode connection terminal includes a positive electrode connection terminal connected to the positive electrode sheet and a negative electrode connection terminal connected to the negative electrode sheet. The sealing portion includes a first positive electrode sealing portion in which the positive electrode connection terminal is sandwiched between laminated films and welded, and a first negative electrode sealing portion in which the negative electrode connecting terminal is sandwiched between laminated films and welded. It has a positive electrode external connection portion for external connection and a positive electrode conductive portion provided between the positive electrode external connection portion and the first positive electrode sealing portion, and the negative electrode connection terminal is a negative electrode external connection for external connection. It is preferable that the portion has a negative electrode conductive portion provided between the negative electrode external connection portion and the first negative electrode sealing portion, and the positive electrode conductive portion or the negative electrode conductive portion is covered with a laminate film without adhesion.
According to such a configuration, the leakage current in the positive electrode conductive portion or the negative electrode conductive portion can be suppressed. Further, by making the positive electrode conductive portion and the laminated film non-adhesive and the negative electrode conductive portion and the laminated film non-adhesive, the positive electrode conductive portion or the negative electrode conductive portion can be easily bent. Further, by bending the positive electrode conductive portion or the negative electrode conductive portion, it is possible to suppress the deterioration of the sealing performance of the first positive electrode sealing portion or the first negative electrode sealing portion.

本発明の密閉型電池において、ラミネートフィルムは、正極接続端子をラミネートフィルムで挟んで溶着した第２正極封止部と、前記溶着部と、第１正極封止部とにより密封された正極導電部収容部を形成し、かつ、負極接続端子をラミネートフィルムで挟んで溶着した第２負極封止部と、前記溶着部と、第１負極封止部とにより密封された負極導電部収容部を形成し、第２正極封止部は、正極導電部と正極外部接続部との間に設けられ、第２負極封止部は、負極導電部と負極外部接続部との間に設けられ、正極導電部は、正極導電部収容部内に収容され、負極導電部は、負極導電部収容部内に収容されたことが好ましい。
このような構成によれば、正極導電部又は負極導電部が露出することを防止することができ、密閉型電池の安全性を向上させることができる。また、第１正極封止部又は第１負極封止部の封止性能が低下した場合でも電解質が漏洩することを防止することができ、密閉型電池の安全性を向上させることができる。
本発明の密閉型電池において、発電要素収容部は、正極導電部収容部と負極導電部収容部との間に配置されたことが好ましい。
このような構成によれば、正極導電部又は負極導電部に容易に折り曲げ部を形成することができ、加工性を向上させることができる。 In the sealed battery of the present invention, the laminated film is a positive electrode conductive portion sealed by a second positive electrode sealing portion in which a positive electrode connection terminal is sandwiched between laminated films, the welded portion, and a first positive electrode sealing portion. A second negative electrode encapsulation portion is formed by forming an accommodating portion and the negative electrode connection terminal is sandwiched between laminated films and welded, and a negative electrode conductive portion accommodating portion sealed by the welded portion and the first negative electrode encapsulation portion is formed. The second positive electrode sealing portion is provided between the positive electrode conductive portion and the positive electrode external connection portion, and the second negative electrode sealing portion is provided between the negative electrode conductive portion and the negative electrode external connection portion. It is preferable that the portion is housed in the positive electrode conductive portion accommodating portion and the negative electrode conductive portion is housed in the negative electrode conductive portion accommodating portion.
According to such a configuration, it is possible to prevent the positive electrode conductive portion or the negative electrode conductive portion from being exposed, and it is possible to improve the safety of the sealed battery. Further, even when the sealing performance of the first positive electrode sealing portion or the first negative electrode sealing portion is deteriorated, it is possible to prevent the electrolyte from leaking, and it is possible to improve the safety of the sealed battery.
In the sealed battery of the present invention, it is preferable that the power generation element accommodating portion is arranged between the positive electrode conductive portion accommodating portion and the negative electrode conductive portion accommodating portion.
According to such a configuration, a bent portion can be easily formed in the positive electrode conductive portion or the negative electrode conductive portion, and the workability can be improved.

本発明の密閉型電池において、正極シートは、正極接続端子に接続する正極集電シートと、正極集電シート上に設けられた正極活物質層とを有し、負極シートは、負極接続端子に接続する負極集電シートと、負極集電シート上に設けられた負極活物質層とを有し、発電要素は、正極活物質層、負極活物質層及びセパレータが重なった部分と、正極接続端子との間の正極集電シートおいて折り曲げることができるように設けられ、かつ、正極活物質層、負極活物質層及びセパレータが重なった部分と、負極接続端子との間の負極集電シートにおいて折り曲げることができるように設けられたことが好ましい。
このような構成によれば、正極外部接続部又は負極外部接続部の位置を変えることが可能になり、小型化された組電池を作製することが可能になる。
本発明の密閉型電池において、正極接続端子及び負極接続端子は、Ｌ字形であることが好ましい。
このような構成によれば、正極外部接続部又は負極外部接続部を発電要素収容部の側面に配置することが可能になる。 In the sealed battery of the present invention, the positive electrode sheet has a positive electrode current collecting sheet connected to the positive electrode connecting terminal and a positive electrode active material layer provided on the positive electrode current collecting sheet, and the negative electrode sheet is connected to the negative electrode connecting terminal. It has a negative electrode current collecting sheet to be connected and a negative electrode active material layer provided on the negative electrode current collecting sheet, and the power generation element includes a portion where the positive electrode active material layer, the negative electrode active material layer and the separator overlap, and a positive electrode connection terminal. In the negative electrode current collecting sheet between the positive electrode active material layer, the negative electrode active material layer and the separator overlapped with the negative electrode connection terminal, which is provided so as to be bendable in the positive electrode current collecting sheet between the two. It is preferable that the electrode is provided so that it can be bent.
According to such a configuration, the position of the positive electrode external connection portion or the negative electrode external connection portion can be changed, and a miniaturized assembled battery can be manufactured.
In the sealed battery of the present invention, the positive electrode connection terminal and the negative electrode connection terminal are preferably L-shaped.
According to such a configuration, the positive electrode external connection portion or the negative electrode external connection portion can be arranged on the side surface of the power generation element accommodating portion.

本発明の密閉型電池において、正極導電部及び負極導電部は、折り曲げ部を有することが好ましい。
このような構成によれば、正極外部接続部又は負極外部接続部の位置を変えることが可能になり、小型化された組電池などを作製することが可能になる。
本発明は、本発明の密閉型電池を複数備え、隣接する２つの密閉型電池の前記外部接続部を接続した組電池も提供する。
本発明の組電池によれば、小型化された組電池を作製することができる。 In the sealed battery of the present invention, the positive electrode conductive portion and the negative electrode conductive portion preferably have a bent portion.
According to such a configuration, the position of the positive electrode external connection portion or the negative electrode external connection portion can be changed, and a miniaturized assembled battery or the like can be manufactured.
The present invention also provides an assembled battery comprising a plurality of the sealed batteries of the present invention and connecting the external connection portions of two adjacent sealed batteries.
According to the assembled battery of the present invention, a miniaturized assembled battery can be manufactured.

以下、図面を用いて本発明の一実施形態を説明する。図面や以下の記述中で示す構成は、例示であって、本発明の範囲は、図面や以下の記述中で示すものに限定されない。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The configurations shown in the drawings and the following description are examples, and the scope of the present invention is not limited to those shown in the drawings and the following description.

図１は、本実施形態の密閉型電池の概略斜視図である。図２〜４は、それぞれ本実施形態の密閉型電池の概略断面図である。図５は、図２、図３又は図４の一点鎖線Ａ−Ａにおける密閉型電池の概略断面図である。
本実施形態の密閉型電池３０は、電極シート１１及びセパレータ１６を含む発電要素１０と、発電要素１０を挟むように設けられたラミネートフィルム１と、電極シート１１に接続する電極接続端子２０と、電解質２５とを備え、ラミネートフィルム１は、ラミネートフィルム１を重ねて溶着した溶着部２と、電極接続端子２０をラミネートフィルム１で挟んで溶着した第１封止部３とにより密封された発電要素収容部５を形成し、発電要素１０及び電解質２５は、発電要素収容部５内に収容され、電極接続端子２０は、外部接続するための外部接続部２１と、外部接続部２１と第１封止部３との間に設けられた導電部２２とを有し、導電部２２は、ラミネートフィルム１により非接着で覆われることを特徴とする。 FIG. 1 is a schematic perspective view of the sealed battery of the present embodiment. 2 to 4 are schematic cross-sectional views of the sealed battery of the present embodiment, respectively. FIG. 5 is a schematic cross-sectional view of the sealed battery in the alternate long and short dash line AA of FIGS. 2, 3 or 4.
The sealed battery 30 of the present embodiment includes a power generation element 10 including an electrode sheet 11 and a separator 16, a laminate film 1 provided so as to sandwich the power generation element 10, and an electrode connection terminal 20 connected to the electrode sheet 11. The power generation element provided with the electrolyte 25 and the laminated film 1 is sealed by a welded portion 2 in which the laminated film 1 is laminated and welded, and a first sealing portion 3 in which the electrode connection terminal 20 is sandwiched between the laminated films 1 and welded. The accommodating portion 5 is formed, the power generation element 10 and the electrolyte 25 are accommodated in the power generation element accommodating portion 5, and the electrode connection terminal 20 is an external connection portion 21 for external connection, and the external connection portion 21 and the first seal. It has a conductive portion 22 provided between the stop portion 3 and the conductive portion 22, and the conductive portion 22 is covered with a laminate film 1 in a non-adhesive manner.

本実施形態の密閉型電池３０は、パウチ電池（pouch battery）である。また、密閉型電池３０は、例えば、リチウムイオン電池、ニッケル・水素電池、ニッケル・カドミウム電池等である。 The sealed battery 30 of the present embodiment is a pouch battery. The sealed battery 30 is, for example, a lithium ion battery, a nickel / hydrogen battery, a nickel cadmium battery, or the like.

ラミネートフィルム１は、複数のフィルムを積層させたフィルムであり、密閉型電池３０の外装となる。
ラミネートフィルム１は、電池の外装に用いることができるものであれば特に限定されないが、例えば、金属フィルムの両面上に樹脂フィルムを積層させたものである。
ラミネートフィルム１の厚さは、例えば５０〜２００μｍとすることができる。 The laminated film 1 is a film in which a plurality of films are laminated, and serves as an exterior of the sealed battery 30.
The laminated film 1 is not particularly limited as long as it can be used for the exterior of the battery, and is, for example, a resin film laminated on both sides of a metal film.
The thickness of the laminated film 1 can be, for example, 50 to 200 μm.

溶着部２は、ラミネートフィルム１を重ね合わせて溶着させた部分である。溶着部２は、発電要素収容部５を形成するために設けられたものであってもよく、導電部収容部６を形成するために設けられたものであってもよい。
また、第１封止部３（第１正極封止部３ａ又は第１負極封止部３ｂ）及び第２封止部４（第２正極封止部４ａ又は第２負極封止部４ｂ）は、電極接続端子２０（正極接続端子２０ａ又は負極接続端子２０ｂ）をラミネートフィルム１で挟んで溶着した部分である。第１封止部３の幅又は第２封止部４の幅は、例えば約１ｃｍとすることができる。
溶着部２、第１封止部３、第２封止部４は、例えば、熱溶着、超音波溶着、振動溶着、赤外線溶着により形成することができる。
溶着部２は、重ねたラミネートフィルム１を接触させ溶着させて形成してもよく、重ねたラミネートフィルム１の間にプライマー等の他の材料を入れ溶着させて形成してもよい。また、第１封止部３又は第２封止部４は、電極接続端子２０にラミネートフィルム１を接触させ溶着させて形成してもよく、電極接続端子２０とラミネートフィルム１との間にプライマー等の他の材料を入れ溶着させて形成してもよい。 The welded portion 2 is a portion in which the laminated film 1 is laminated and welded. The welding portion 2 may be provided to form the power generation element accommodating portion 5, or may be provided to form the conductive portion accommodating portion 6.
Further, the first sealing portion 3 (first positive electrode sealing portion 3a or first negative electrode sealing portion 3b) and the second sealing portion 4 (second positive electrode sealing portion 4a or second negative electrode sealing portion 4b) are , The electrode connection terminal 20 (positive electrode connection terminal 20a or negative electrode connection terminal 20b) is sandwiched between the laminate film 1 and welded. The width of the first sealing portion 3 or the width of the second sealing portion 4 can be, for example, about 1 cm.
The welding portion 2, the first sealing portion 3, and the second sealing portion 4 can be formed by, for example, heat welding, ultrasonic welding, vibration welding, or infrared welding.
The welded portion 2 may be formed by contacting and welding the laminated laminate films 1 or by inserting another material such as a primer between the laminated laminated films 1 and welding the welded portion 2. Further, the first sealing portion 3 or the second sealing portion 4 may be formed by bringing the laminate film 1 into contact with the electrode connection terminal 20 and welding the laminate film 1, and a primer is formed between the electrode connection terminal 20 and the laminate film 1. Other materials such as the above may be put in and welded to form.

ラミネートフィルム１は、発電要素１０と電解質２５を収容する密封された発電要素収容部５を形成する。発電要素収容部５は、２枚のラミネートフィルム１で発電要素１０を挟み、発電要素１０の周りに溶着部２、第１正極封止部３ａ、第１負極封止部３ｂを形成することにより設けることができる。また、発電要素収容部５は、１枚のラミネートフィルム１を折り曲げ、谷折部内に発電要素１０を配置し、発電要素１０の周りに溶着部２、第１正極封止部３ａ、第１負極封止部３ｂを形成することにより設けてもよい。 The laminated film 1 forms a sealed power generation element accommodating portion 5 that accommodates the power generation element 10 and the electrolyte 25. The power generation element accommodating portion 5 sandwiches the power generation element 10 between two laminated films 1 and forms a welding portion 2, a first positive electrode sealing portion 3a, and a first negative electrode sealing portion 3b around the power generation element 10. Can be provided. Further, in the power generation element accommodating portion 5, one laminated film 1 is bent, the power generation element 10 is arranged in the valley fold portion, and the welding portion 2, the first positive electrode sealing portion 3a, and the first negative electrode are arranged around the power generation element 10. It may be provided by forming the sealing portion 3b.

ラミネートフィルム１は、正極導電部２２ａ又は負極導電部２２ｂを非接着で覆う。このことにより、正極導電部２２ａ又は負極導電部２２ｂが露出することを防止することができ、正極導電部２２ａ又は負極導電部２２ｂにおいてリーク電流が生じることを抑制することができる。また、正極導電部２２ａ又は負極導電部２２ｂを容易に折り曲げることが可能になり、加工性を向上させることができる。
ラミネートフィルム１は、正極接続端子２０ａの正極導電部２２ａを収容する正極導電部収容部６ａを形成してもよい。正極導電部収容部６ａにおいて、正極導電部２２ａとラミネートフィルム１は非接着とすることができる。また、ラミネートフィルム１は、負極接続端子２０ｂの負極導電部２２ｂを収容する負極導電部収容部６ｂを形成してもよい。負極導電部収容部６ｂにおいて、負極導電部２２ｂとラミネートフィルム１は非接着とすることができる。
また、図１〜５に示した密閉型電池３０のように、発電要素収容部５が正極導電部収容部６ａと負極導電部収容部６ｂとの間に位置するように正極導電部収容部６ａ及び負極導電部収容部６ｂを形成することができる。 The laminated film 1 covers the positive electrode conductive portion 22a or the negative electrode conductive portion 22b without adhesion. As a result, it is possible to prevent the positive electrode conductive portion 22a or the negative electrode conductive portion 22b from being exposed, and it is possible to suppress the occurrence of a leak current in the positive electrode conductive portion 22a or the negative electrode conductive portion 22b. Further, the positive electrode conductive portion 22a or the negative electrode conductive portion 22b can be easily bent, and the workability can be improved.
The laminated film 1 may form a positive electrode conductive portion accommodating portion 6a accommodating the positive electrode conductive portion 22a of the positive electrode connection terminal 20a. In the positive electrode conductive portion accommodating portion 6a, the positive electrode conductive portion 22a and the laminate film 1 can be non-adhesive. Further, the laminated film 1 may form a negative electrode conductive portion accommodating portion 6b for accommodating the negative electrode conductive portion 22b of the negative electrode connection terminal 20b. In the negative electrode conductive portion accommodating portion 6b, the negative electrode conductive portion 22b and the laminate film 1 can be non-adhesive.
Further, as in the sealed battery 30 shown in FIGS. 1 to 5, the positive electrode conductive portion accommodating portion 6a is located so that the power generation element accommodating portion 5 is located between the positive electrode conductive portion accommodating portion 6a and the negative electrode conductive portion accommodating portion 6b. And the negative electrode conductive portion accommodating portion 6b can be formed.

図２に示した密閉型電池３０のように、正極導電部収容部６ａ又は負極導電部収容部６ｂは、上部や下部などが開いていてもよい。この他に、図示は無いが、上部と下部のみを閉じて側端部が空いてもよい。
図３、４に示した密閉型電池３０のように、正極導電部収容部６ａ又は負極導電部収容部６ｂは、密封されていてもよい。密封された正極導電部収容部６ａは、正極導電部２２ａの周りに溶着部２と第１正極封止部３ａと第２正極封止部４ａとを形成することにより設けることができる。なお、第２正極封止部４ａは、正極導電部２２ａと正極外部接続部２１ａとの間に設けられる。
密封された負極導電部収容部６ｂは、負極導電部２２ｂの周りに溶着部２と第１負極封止部３ｂと第２負極封止部４ｂとを形成することにより設けることができる。なお、第２負極封止部４ｂは、負極導電部２２ｂと負極外部接続部２１ｂとの間に設けられる。 Like the sealed battery 30 shown in FIG. 2, the upper or lower portion of the positive electrode conductive portion accommodating portion 6a or the negative electrode conductive portion accommodating portion 6b may be open. In addition to this, although not shown, only the upper part and the lower part may be closed to open the side end portion.
Like the sealed battery 30 shown in FIGS. 3 and 4, the positive electrode conductive portion accommodating portion 6a or the negative electrode conductive portion accommodating portion 6b may be sealed. The sealed positive electrode conductive portion accommodating portion 6a can be provided by forming a welding portion 2, a first positive electrode sealing portion 3a, and a second positive electrode sealing portion 4a around the positive electrode conductive portion 22a. The second positive electrode sealing portion 4a is provided between the positive electrode conductive portion 22a and the positive electrode external connection portion 21a.
The sealed negative electrode conductive portion accommodating portion 6b can be provided by forming a welding portion 2, a first negative electrode sealing portion 3b, and a second negative electrode sealing portion 4b around the negative electrode conductive portion 22b. The second negative electrode sealing portion 4b is provided between the negative electrode conductive portion 22b and the negative electrode external connection portion 21b.

このような密封された正極導電部収容部６ａ又は密封された負極導電部収容部６ｂを設けることにより、密閉型電池３０の安全性を向上させることができる。例えば、第１正極封止部３ａ又は第１負極封止部３ｂの封止性能が低下し、電解質２５が漏れたとしても、漏れた電解質２５は正極導電部収容部６ａ又は負極導電部収容部６ｂに溜まり、密閉型電池３０の外部に漏洩しない。従って、電解質２５の漏洩を防止することができ、密閉型電池３０の安全性が向上する。 By providing such a sealed positive electrode conductive portion accommodating portion 6a or a sealed negative electrode conductive portion accommodating portion 6b, the safety of the sealed battery 30 can be improved. For example, even if the sealing performance of the first positive electrode sealing portion 3a or the first negative electrode sealing portion 3b deteriorates and the electrolyte 25 leaks, the leaked electrolyte 25 remains in the positive electrode conductive portion accommodating portion 6a or the negative electrode conductive portion accommodating portion. It collects in 6b and does not leak to the outside of the sealed battery 30. Therefore, the leakage of the electrolyte 25 can be prevented, and the safety of the sealed battery 30 is improved.

発電要素１０は、電極シート１１（正極シート１１ａ又は負極シート１１ｂ）及びセパレータ１６を含む。また、発電要素１０は、発電要素収容部５内部に収容され電解質２５と共に電池反応をする。この電池反応により密閉型電池３０は、放電又は充電をすることができる。なお、密閉型電池３０が１つの発電要素１０を有してもよく、密閉型電池３０が複数の発電要素１０を有してもよい。また、正極シート１１ａの幅と負極シート１１ｂの幅は、同じであってもよく、異なってもよい。正極シート１１ａの幅と負極シート１１ｂの幅が異なる場合、少なくとも幅の大きいほうの電極シート１１の端部がセパレータ１６と接触しないように発電要素１０を設けることができる。
図５に示した密閉型電池３０のように、発電要素１０は、セパレータ１６と、セパレータ１６を介して配置された正極シート１１ａおよび負極シート１１ｂを備える。発電要素１０は、セパレータ１６を介して配置された正極シート１１ａおよび負極シート１１ｂを重ね合わせた積層構造を有してもよく、セパレータ１６を介して配置された正極シート１１ａおよび負極シート１１ｂを巻いた巻回構造を有してもよい。
例えば、発電要素１０は、つづら折りされた１枚のセパレータ１６と、セパレータ１６の各谷溝に配置され、かつ、セパレータ１６を介して交互に配置された正極シート１１ａおよび負極シート１１ｂとを備えることができる。
なお、１つの発電要素１０に含まれる正極シート１１ａまたは負極シート１１ｂの積層数は、必要な電池容量に合わせて適宜設計するとよい。 The power generation element 10 includes an electrode sheet 11 (positive electrode sheet 11a or negative electrode sheet 11b) and a separator 16. Further, the power generation element 10 is housed inside the power generation element accommodating portion 5 and undergoes a battery reaction together with the electrolyte 25. By this battery reaction, the sealed battery 30 can be discharged or charged. The sealed battery 30 may have one power generation element 10, and the closed battery 30 may have a plurality of power generation elements 10. Further, the width of the positive electrode sheet 11a and the width of the negative electrode sheet 11b may be the same or different. When the width of the positive electrode sheet 11a and the width of the negative electrode sheet 11b are different, the power generation element 10 can be provided so that at least the end portion of the electrode sheet 11 having the larger width does not come into contact with the separator 16.
Like the sealed battery 30 shown in FIG. 5, the power generation element 10 includes a separator 16 and a positive electrode sheet 11a and a negative electrode sheet 11b arranged via the separator 16. The power generation element 10 may have a laminated structure in which the positive electrode sheet 11a and the negative electrode sheet 11b arranged via the separator 16 are overlapped with each other, and the positive electrode sheet 11a and the negative electrode sheet 11b arranged via the separator 16 are wound. It may have a wound winding structure.
For example, the power generation element 10 includes one zigzag-folded separator 16 and positive electrode sheets 11a and negative electrode sheets 11b arranged in each valley groove of the separator 16 and alternately arranged via the separator 16. Can be done.
The number of layers of the positive electrode sheet 11a or the negative electrode sheet 11b included in one power generation element 10 may be appropriately designed according to the required battery capacity.

セパレータ１６は、シート状であり、正極シート１１ａと負極シート１１ｂとの間に配置される。セパレータ１６は、正極シート１１ａと負極シート１１ｂとの間に短絡電流が流れることを防止することができ、電解質が透過可能なものであれば特に限定されないが、例えばポリオレフィンの微多孔性フィルムとすることができる。 The separator 16 has a sheet shape and is arranged between the positive electrode sheet 11a and the negative electrode sheet 11b. The separator 16 is not particularly limited as long as it can prevent a short-circuit current from flowing between the positive electrode sheet 11a and the negative electrode sheet 11b and is permeable to the electrolyte, but is, for example, a microporous polyolefin film. be able to.

正極シート１１ａは、正極集電シート１４と、正極集電シート１４上に設けられた正極活物質層１２と備える。正極シート１１ａは、例えば、方形の正極集電シート１４の両面上に正極活物質層１２を形成することにより形成することができる。正極活物質層１２は、正極集電シート１４の端部まで形成されていてもよく、正極集電シートの端部に未塗工部が存在してもよい。また、正極集電シート１４の両面上の正極活物質層１２の幅は、同じであってもよく異なってもよい。正極シート１１ａの大きさは、例えば約６ｃｍ×約１２ｃｍとすることができる。
正極シート１１ａは、正極接続端子２０ａの正極接続部２３ａに接続するための端子接続部を有することができ、この端子接続部は、正極シート１１ａの端部の正極集電シート１４の両面上に正極活物質層１２を形成しないことで設けることができる。また、正極集電シート１４の１つの端部に、この端部から外部へ突出した凸状の耳部を形成し、該耳部に正極活物質層１２を形成しないことで端子接続部を設けることもできる。 The positive electrode sheet 11a includes a positive electrode current collecting sheet 14 and a positive electrode active material layer 12 provided on the positive electrode current collecting sheet 14. The positive electrode sheet 11a can be formed, for example, by forming the positive electrode active material layer 12 on both sides of the square positive electrode current collector sheet 14. The positive electrode active material layer 12 may be formed up to the end of the positive electrode current collector sheet 14, and an uncoated portion may be present at the end of the positive electrode current collector sheet. Further, the width of the positive electrode active material layer 12 on both sides of the positive electrode current collector sheet 14 may be the same or different. The size of the positive electrode sheet 11a can be, for example, about 6 cm × about 12 cm.
The positive electrode sheet 11a can have a terminal connecting portion for connecting to the positive electrode connecting portion 23a of the positive electrode connecting terminal 20a, and this terminal connecting portion is provided on both sides of the positive electrode current collecting sheet 14 at the end of the positive electrode sheet 11a. It can be provided by not forming the positive electrode active material layer 12. Further, a convex ear portion protruding outward from this end portion is formed on one end portion of the positive electrode current collecting sheet 14, and a terminal connection portion is provided by not forming the positive electrode active material layer 12 on the ear portion. You can also do it.

正極集電シート１４は、電気伝導性を有し、表面上に正極活物質層１２を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくはアルミニウム箔である。正極集電シート１４の厚さは、例えば、１００μｍ〜４００μｍである。
正極活物質層１２は、正極活物質に導電剤、結着剤などを添加し、塗布法などにより正極集電シート１４の上に形成することができる。正極活物質は、例えば、リチウムイオンを可逆的に吸蔵・放出することが可能なリチウム遷移金属複合酸化物、すなわち、ＬｉＣｏＯ2、ＬｉＮｉＯ2、ＬｉＮｉxＣｏ1-xＯ2（ｘ＝０．０１〜０．９９）、ＬｉＭｎＯ2、ＬｉＭｎ2Ｏ4、ＬｉＣｏxＭｎyＮｉzＯ2（ｘ＋ｙ＋ｚ＝１）又はオリビン型のＬｉＦｅＰＯ4やＬｉxＦｅ1-yＭyＰＯ4（但し、０．０５≦ｘ≦１．２、０≦ｙ≦０．８であり、ＭはＭｎ、Ｃｒ、Ｃｏ、Ｃｕ、Ｎｉ、Ｖ、Ｍｏ、Ｔｉ、Ｚｎ、Ａｌ、Ｇａ、Ｍｇ、Ｂ、Ｎｂのうち少なくとも１種以上である）などが一種単独もしくは複数種を混合して使用することができる。 The positive electrode current collecting sheet 14 is not particularly limited as long as it has electrical conductivity and can be provided with the positive electrode active material layer 12 on the surface, but is, for example, a metal foil. Aluminum foil is preferable. The thickness of the positive electrode current collector sheet 14 is, for example, 100 μm to 400 μm.
The positive electrode active material layer 12 can be formed on the positive electrode current collecting sheet 14 by adding a conductive agent, a binder, or the like to the positive electrode active material and by a coating method or the like. The positive electrode active material is, for example, a lithium transition metal composite oxide capable of reversibly occluding and releasing lithium ions, that is, LiCoO 2 , LiNiO 2 , LiNi x Co 1-x O 2 (x = 0.01). ~0.99), LiMnO 2, LiMn 2 O 4, LiCo x Mn y Ni z O 2 (x + y + z = 1) or olivine LiFePO 4 and Li x Fe 1-y M y PO 4 ( where 0.05 ≦ x ≦ 1.2, 0 ≦ y ≦ 0.8, and M is at least one of Mn, Cr, Co, Cu, Ni, V, Mo, Ti, Zn, Al, Ga, Mg, B, and Nb. Species or more) can be used alone or in admixture of multiple species.

負極シート１１ｂは、負極集電シート１５と、負極集電シート１５上に設けられた負極活物質層１３と備える。負極シート１１ｂは、例えば、方形の負極集電シート１５の両面に負極活物質層１３を形成することにより形成することができる。負極活物質層１３は、負極集電シート１５の端部まで形成されていてもよく、負極集電シート１５の端部に未塗工部が存在してもよい。また、負極集電シート１５の両面上の負極活物質層１３の幅は、同じであってもよく異なってもよい。負極シート１１ｂの大きさは、例えば約６ｃｍ×約１２ｃｍとすることができる。
負極シート１１ｂは、負極接続端子２０ｂの負極接続部２３ｂに接続するための端子接続部を有することができ、端子接続部は、負極シート１１ｂの端部の負極集電シート１５の両面上に負極活物質層１３を形成しないことで設けることができる。また、負極集電シート１５の１つの端部に耳部を形成し、該耳部に負極活物質層１３を形成しないことで端子接続部を設けることもできる。 The negative electrode sheet 11b includes a negative electrode current collecting sheet 15 and a negative electrode active material layer 13 provided on the negative electrode current collecting sheet 15. The negative electrode sheet 11b can be formed, for example, by forming the negative electrode active material layers 13 on both sides of the square negative electrode current collector sheet 15. The negative electrode active material layer 13 may be formed up to the end of the negative electrode current collector sheet 15, and an uncoated portion may be present at the end of the negative electrode current collector sheet 15. Further, the width of the negative electrode active material layer 13 on both sides of the negative electrode current collector sheet 15 may be the same or different. The size of the negative electrode sheet 11b can be, for example, about 6 cm × about 12 cm.
The negative electrode sheet 11b can have a terminal connecting portion for connecting to the negative electrode connecting portion 23b of the negative electrode connecting terminal 20b, and the terminal connecting portion is a negative electrode on both sides of the negative electrode current collecting sheet 15 at the end of the negative electrode sheet 11b. It can be provided by not forming the active material layer 13. Further, a terminal connection portion can be provided by forming an ear portion at one end of the negative electrode current collecting sheet 15 and not forming the negative electrode active material layer 13 at the ear portion.

負極集電シート１５は、電気伝導性を有し、表面上に負極活物質層１３を備えることができれば、特に限定されないが、例えば、金属箔である。好ましくは銅箔である。負極集電シート１５の厚さは、例えば、１００μｍ〜４００μｍである。
負極活物質層１３は、負極活物質に導電剤、結着剤などを添加し、塗布法などにより負極集電シート１５の上に形成することができる。負極活物質は、例えば、リチウムイオン二次電池の場合、グラファイト、部分黒鉛化した炭素、ハードカーボン、ソフトカーボン、ＬｉＴｉＯ4、Ｓｎ合金等を一種単独もしくは複数種混合して使用することができる。 The negative electrode current collecting sheet 15 is not particularly limited as long as it has electrical conductivity and the negative electrode active material layer 13 can be provided on the surface, but is, for example, a metal foil. Copper foil is preferable. The thickness of the negative electrode current collector sheet 15 is, for example, 100 μm to 400 μm.
The negative electrode active material layer 13 can be formed on the negative electrode current collecting sheet 15 by adding a conductive agent, a binder, or the like to the negative electrode active material and by a coating method or the like. As the negative electrode active material, for example, in the case of a lithium ion secondary battery, graphite, partially graphitized carbon, hard carbon, soft carbon, LiTIO 4 , Sn alloy and the like can be used alone or in combination of two or more.

発電要素１０は、正極活物質層１２、負極活物質層１３及びセパレータ１６が重なった部分と、正極接続端子２０ａとの間の正極集電シート１４を折り曲げ可能に設けることができる。この部分には、正極活物質層１２が形成されておらず、正極集電シート１４のみであり、折り曲げても電池性能に影響は無い。また、正極接続端子２０ａとの接続部分でもないので、機械的特性等を気にすることなく折り曲げることができる。このことにより、正極接続端子２０ａの配置を変えることができ、密閉型電池３０をより狭いスペースに配置することが可能になる。例えば、図２〜５の破線Ｄ−Ｄにおいて発電要素１０を折り曲げることができる。 The power generation element 10 can be provided so that the positive electrode current collecting sheet 14 between the portion where the positive electrode active material layer 12, the negative electrode active material layer 13 and the separator 16 overlap and the positive electrode connection terminal 20a can be bent. The positive electrode active material layer 12 is not formed in this portion, only the positive electrode current collecting sheet 14 is formed, and even if it is bent, the battery performance is not affected. Further, since it is not a connection portion with the positive electrode connection terminal 20a, it can be bent without worrying about mechanical characteristics and the like. As a result, the arrangement of the positive electrode connection terminals 20a can be changed, and the sealed battery 30 can be arranged in a narrower space. For example, the power generation element 10 can be bent at the broken line DD in FIGS. 2 to 5.

発電要素１０は、正極活物質層１２、負極活物質層１３及びセパレータ１６が重なった部分と、負極接続端子２０ｂとの間の負極集電シート１５を折り曲げ可能に設けることができる。この部分には、負極活物質層１３が形成されておらず、負極集電シート１５のみであり、折り曲げても電池性能に影響は無い。また、負極接続端子２０ｂとの接続部分でもないので、機械的特性等を気にすることなく折り曲げることができる。このことにより、負極接続端子２０ｂの配置を変えることができ、密閉型電池３０をより狭いスペースに配置することが可能になる。例えば、図２〜５の破線Ｃ−Ｃにおいて発電要素１０を折り曲げることができる。 The power generation element 10 can be provided so that the negative electrode current collecting sheet 15 between the portion where the positive electrode active material layer 12, the negative electrode active material layer 13 and the separator 16 overlap and the negative electrode connecting terminal 20b can be bent. The negative electrode active material layer 13 is not formed in this portion, only the negative electrode current collector sheet 15 is formed, and even if it is bent, the battery performance is not affected. Further, since it is not a connection portion with the negative electrode connection terminal 20b, it can be bent without worrying about mechanical characteristics and the like. As a result, the arrangement of the negative electrode connection terminals 20b can be changed, and the sealed battery 30 can be arranged in a narrower space. For example, the power generation element 10 can be bent at the broken line CC in FIGS. 2 to 5.

電解質２５は、溶媒としてカーボネート類、ラクトン類、エーテル類、エステル類などを使用することができ、これら溶媒の２種類以上を混合して用いることもできる。これらの中では特に環状カーボネートと鎖状カーボネートを混合して用いることが好ましい。電解質２５は、例えば、電解質としてのＬｉＣＦ3ＳＯ3、ＬｉＡｓＦ6、ＬｉＣｌＯ4、ＬｉＢＦ4、ＬｉＰＦ6、ＬｉＢＯＢ、ＬｉＮ(ＣＦ3ＳＯ2)2、ＬｉＮ(Ｃ2Ｆ5ＳＯ2)等のリチウム塩溶質を有機溶媒に溶解した溶液である。また、必要に応じてＶＣ（ビニレンカーボネート）、ＰＳ（プロパンスルトン）、ＶＥＣ（ビニルエチルカーボネート）、ＰＲＳ（プロペンスルトン）、難燃剤等の添加剤を単独または複数種を混合して配合してもよい。 As the electrolyte 25, carbonates, lactones, ethers, esters and the like can be used as the solvent, and two or more of these solvents can be mixed and used. Among these, it is particularly preferable to use a mixture of cyclic carbonate and chain carbonate. The electrolyte 25 is, for example, a lithium salt such as LiCF 3 SO 3 , LiAsF 6 , LiClO 4 , LiBF 4 , LiPF 6 , LiBOB, LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ) as an electrolyte. It is a solution in which a solute is dissolved in an organic solvent. Further, if necessary, additives such as VC (vinylene carbonate), PS (propane sultone), VEC (vinyl ethyl carbonate), PRS (propene sultone), and flame retardants may be mixed alone or in combination of two or more. Good.

電極接続端子２０（正極接続端子２０ａ又は負極接続端子２０ｂ）は、電極シート１１（正極シート１１ａ又は負極シート１１ｂ）に接続するための電極接続部２３（正極接続部２３ａ又は負極接続部２３ｂ）と、外部接続するための外部接続部２１（正極外部接続部２１ａ又は負極外部接続部２１ｂ）と、電極接続部２３と外部接続部２１との間に設けられた導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）とを含む。なお、正極接続端子２０ａは、正極接続部２３ａと正極外部接続部２１ａと正極導電部２２ａとを含み、負極接続端子２０ｂは、負極接続部２３ｂと負極外部接続部２１ｂと負極導電部２２ｂとを含む。 The electrode connection terminal 20 (positive electrode connection terminal 20a or negative electrode connection terminal 20b) is connected to the electrode connection portion 23 (positive electrode connection portion 23a or negative electrode connection portion 23b) for connecting to the electrode sheet 11 (positive electrode sheet 11a or negative electrode sheet 11b). , An external connection portion 21 for external connection (positive electrode external connection portion 21a or negative electrode external connection portion 21b) and a conductive portion 22 (positive electrode conductive portion 22a or positive electrode conductive portion 22a) provided between the electrode connection portion 23 and the external connection portion 21. Includes the negative electrode conductive portion 22b). The positive electrode connection terminal 20a includes a positive electrode connection portion 23a, a positive electrode external connection portion 21a, and a positive electrode conductive portion 22a, and the negative electrode connection terminal 20b includes a negative electrode connection portion 23b, a negative electrode external connection portion 21b, and a negative electrode conductive portion 22b. Including.

電極接続端子２０は、例えば、厚さが１００μｍ〜５００μｍの金属板とすることができる。この金属板は、プレス加工されていてもよく、折り曲げられていてもよい。例えば、正極接続端子２０ａは、アルミニウム板とすることができ、負極接続端子２０ｂは、銅板とすることができる。
電極接続端子２０は、色々な形状を取ることができ、例えば、方形であっても、Ｌ字形であってもよい。また、外部接続部２１は電極接続端子２０そのものを利用しても良いし、別途外部接続部を溶接等によって電極接続端子２０に取り付けてもよい。
図２、３に示した密閉型電池３０のように、電極接続端子２０をＬ字形とした場合は、Ｌ字形の電極接続端子２０の一方の端に電極接続部２３を設け、他方の端に外部接続部２１を設けてもよい。このような形状を有すると、導電部２２に折り曲げ部２６を形成したときに、密閉型電池３０の側面上部に外部接続部２１を配置することができ、狭いスペースに密閉型電池３０を配置することが可能になる。Ｌ字形の電極接続端子２０は、例えば、電極接続部２３及び導電部２２における幅を約５ｃｍとすることができる。電極シート１１の端子接続部と電極接続部２３は、例えば、約１ｃｍ重ねて超音波溶接により接続することができる。
また、図４に示した密閉型電池３０のように、導電部２２に折り曲げ部２６を形成したときに、密閉型電池３０の側部に外部接続部２１が配置されるように外部接続部２１を設けてもよい。 The electrode connection terminal 20 can be, for example, a metal plate having a thickness of 100 μm to 500 μm. This metal plate may be pressed or bent. For example, the positive electrode connection terminal 20a can be an aluminum plate, and the negative electrode connection terminal 20b can be a copper plate.
The electrode connection terminal 20 can take various shapes, and may be, for example, square or L-shaped. Further, the external connection portion 21 may use the electrode connection terminal 20 itself, or the external connection portion may be separately attached to the electrode connection terminal 20 by welding or the like.
When the electrode connection terminal 20 is L-shaped as in the sealed battery 30 shown in FIGS. 2 and 3, an electrode connection portion 23 is provided at one end of the L-shaped electrode connection terminal 20 and is provided at the other end. The external connection portion 21 may be provided. With such a shape, when the bent portion 26 is formed in the conductive portion 22, the external connection portion 21 can be arranged on the upper side surface of the sealed battery 30, and the sealed battery 30 is arranged in a narrow space. Will be possible. The width of the L-shaped electrode connection terminal 20 at the electrode connection portion 23 and the conductive portion 22 can be, for example, about 5 cm. The terminal connection portion and the electrode connection portion 23 of the electrode sheet 11 can be connected by ultrasonic welding, for example, by overlapping by about 1 cm.
Further, as in the sealed battery 30 shown in FIG. 4, when the bent portion 26 is formed in the conductive portion 22, the external connecting portion 21 is arranged so that the external connecting portion 21 is arranged on the side portion of the sealed battery 30. May be provided.

第１封止部３（第１正極封止部３ａ又は第１負極封止部３ｂ）は、電極接続部２３（正極接続部２３ａ又は負極接続部２３ｂ）と導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）との間に設けられる。このため、電極接続部２３は、発電要素収容部５の内部に位置し、導電部２２及び外部接続部２１は、発電要素収容部５の外部に位置する。このため、発電要素収容部５の密閉状態を維持したまま、正極集電シート１４又は負極集電シート１５で集電した電荷を電極接続端子２０により外部回路に引き出すことが可能となり、密閉型電池３０の放電または充電が可能になる。 The first sealing portion 3 (first positive electrode sealing portion 3a or first negative electrode sealing portion 3b) includes an electrode connecting portion 23 (positive electrode connecting portion 23a or negative electrode connecting portion 23b) and a conductive portion 22 (positive electrode conductive portion 22a or It is provided between the negative electrode conductive portion 22b). Therefore, the electrode connecting portion 23 is located inside the power generation element accommodating portion 5, and the conductive portion 22 and the external connecting portion 21 are located outside the power generation element accommodating portion 5. Therefore, while maintaining the sealed state of the power generation element accommodating portion 5, the electric charge collected by the positive electrode current collecting sheet 14 or the negative electrode current collecting sheet 15 can be drawn out to the external circuit by the electrode connection terminal 20, and the sealed battery. 30 can be discharged or charged.

外部接続部２１（正極外部接続部２１ａ又は負極外部接続部２１ｂ）は、密閉型電池３０が他の電池や外部配線やバスバーや機器側の端子などと接続する部分である。この外部接続部２１を介して密閉型電池３０が機器などに接続することができる。また、複数の密閉型電池３０を組み合わせて組電池３５を構成する場合、複数の密閉型電池３０の外部接続部２１を接続することにより、複数の密閉型電池３０を直列接続又は並列接続することができる。
外部接続部２１は、ラミネートフィルム１により覆われないように設けることができる。このことにより、外部接続部２１が機器側の端子や他の電池の外部接続部などに容易に接続することができる。 The external connection portion 21 (positive electrode external connection portion 21a or negative electrode external connection portion 21b) is a portion where the sealed battery 30 is connected to another battery, external wiring, a bus bar, a terminal on the device side, or the like. The sealed battery 30 can be connected to a device or the like via the external connection portion 21. Further, when a plurality of sealed batteries 30 are combined to form the assembled battery 35, the plurality of sealed batteries 30 are connected in series or in parallel by connecting the external connection portions 21 of the plurality of sealed batteries 30. Can be done.
The external connection portion 21 can be provided so as not to be covered by the laminate film 1. As a result, the external connection portion 21 can be easily connected to a terminal on the device side, an external connection portion of another battery, or the like.

導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）は、外部接続部２１（正極外部接続部２１ａ又は負極外部接続部２１ｂ）と第１封止部３（第１正極封止部３ａ又は第１負極封止部３ｂ）との間に設けられ、電極接続部２３と外部接続部２１との間の導電経路となる。導電部２２を設けることにより、外部接続部２１の位置を変えることが容易になり、機器側の電池接続部の位置と外部接続部２１の位置とを容易に合わせることができる。また、複数の密閉型電池３０により組電池３５を構成する場合、複数の密閉型電池３０を容易に接続することが可能になる。 The conductive portion 22 (positive electrode conductive portion 22a or negative electrode conductive portion 22b) includes an external connection portion 21 (positive electrode external connection portion 21a or negative electrode external connection portion 21b) and a first sealing portion 3 (first positive electrode sealing portion 3a or first positive electrode sealing portion 3a or first). 1 It is provided between the negative electrode sealing portion 3b) and serves as a conductive path between the electrode connecting portion 23 and the external connecting portion 21. By providing the conductive portion 22, the position of the external connection portion 21 can be easily changed, and the position of the battery connection portion on the device side and the position of the external connection portion 21 can be easily aligned. Further, when the assembled battery 35 is composed of a plurality of sealed batteries 30, the plurality of sealed batteries 30 can be easily connected.

導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）は、ラミネートフィルム１により非接着で覆われる。このことにより、導電部２２をラミネートフィルム１により絶縁することができ、リーク電流が流れることを抑制することができる。また、導電部２２を保護することができる。また、ラミネートフィルム１により導電部２２を覆うことにより、密閉型電池３０の部品数を少なくすることができ、製造コストを低減することができる。図２〜４に示した密閉型電池３０のように導電部２２の全体がラミネートフィルム１で覆われてもよく、導電部２２の一部のみがラミネートフィルム１で覆われてもよい。また、導電部２２の一方の面のみがラミネートフィルム１で覆われてもよい。 The conductive portion 22 (positive electrode conductive portion 22a or negative electrode conductive portion 22b) is covered with the laminate film 1 in a non-adhesive manner. As a result, the conductive portion 22 can be insulated by the laminate film 1, and the flow of leakage current can be suppressed. In addition, the conductive portion 22 can be protected. Further, by covering the conductive portion 22 with the laminated film 1, the number of parts of the sealed battery 30 can be reduced, and the manufacturing cost can be reduced. Like the sealed battery 30 shown in FIGS. 2 to 4, the entire conductive portion 22 may be covered with the laminated film 1, or only a part of the conductive portion 22 may be covered with the laminated film 1. Further, only one surface of the conductive portion 22 may be covered with the laminated film 1.

導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）は、ラミネートフィルム１により形成された導電部収容部２２（正極導電部収容部２２ａ又は負極導電部収容部２２ｂ）の内部に収容されてもよい。導電部収容部２２の内部では、ラミネートフィルム１と導電部２２は、非接着にする。
導電部２２は、図２に示した密閉型電池３０のように開いた導電部収容部２２に収容してもよく、図３、４に示した密閉型電池３０のように密封された導電部収容部２２に収容してもよい。
導電部２２を導電部収容部２２に収容することにより、導電部２２が露出することを防止することができ、密閉型電池３０の安全性を向上させることができる。 Even if the conductive portion 22 (positive electrode conductive portion 22a or negative electrode conductive portion 22b) is accommodated inside the conductive portion accommodating portion 22 (positive electrode conductive portion accommodating portion 22a or negative electrode conductive portion accommodating portion 22b) formed of the laminated film 1. Good. Inside the conductive portion accommodating portion 22, the laminate film 1 and the conductive portion 22 are made non-adhesive.
The conductive portion 22 may be housed in an open conductive portion accommodating portion 22 as in the sealed battery 30 shown in FIG. 2, or is sealed as in the sealed battery 30 shown in FIGS. 3 and 4. It may be accommodated in the accommodating portion 22.
By accommodating the conductive portion 22 in the conductive portion accommodating portion 22, it is possible to prevent the conductive portion 22 from being exposed, and it is possible to improve the safety of the sealed battery 30.

導電部２２（正極導電部２２ａ又は負極導電部２２ｂ）は、折り曲げ部２６を有することができる。正極導電部２２ａの折り曲げ部２６は、例えば図２〜５の破線Ｅ−Ｅにおいて、正極導電部２２ａを折り曲げ加工することにより形成することができる。また、負極導電部２２ｂの折り曲げ部２６は、例えば図２〜５の破線Ｂ−Ｂにおいて、負極導電部２２ｂを折り曲げ加工することにより形成することができる。
折り曲げ部２６を形成することにより、外部接続部２１の位置を変えることができる。このことにより、機器の端子位置に合わせて外部接続部２１の位置を変えることや、組電池３５の接続部３３の位置に合わせて外部接続部２１の位置を変えることが可能になる。このことにより、小型化された組電池３５などを作製することが可能になる。また、バスバーを使わずに複数の密閉型電池３０を接続することも可能になる。 The conductive portion 22 (positive electrode conductive portion 22a or negative electrode conductive portion 22b) can have a bent portion 26. The bent portion 26 of the positive electrode conductive portion 22a can be formed, for example, by bending the positive electrode conductive portion 22a at the broken lines EE in FIGS. 2 to 5. Further, the bent portion 26 of the negative electrode conductive portion 22b can be formed, for example, by bending the negative electrode conductive portion 22b at the broken line BB in FIGS. 2 to 5.
By forming the bent portion 26, the position of the external connecting portion 21 can be changed. This makes it possible to change the position of the external connection portion 21 according to the terminal position of the device and change the position of the external connection portion 21 according to the position of the connection portion 33 of the assembled battery 35. This makes it possible to manufacture a miniaturized assembled battery 35 or the like. It is also possible to connect a plurality of sealed batteries 30 without using a bus bar.

図６は、折り曲げ部２６の概略断面図である。折り曲げ部２６では、導電部２２が折り曲げられるため、導電部収容部６を構成するラミネートフィルム１も折り曲げられる。折り曲げ部２６の内側のラミネートフィルム１には、圧縮力がかかり、折り曲げ部２６の外側のラミネートフィルム１には、引張力がかかる。しかし、折り曲げ部２６では、導電部２２とラミネートフィルム１は、非接着であるため、導電部２２に対してラミネートフィルム１がずれることができるため、ラミネートフィルム１にかかる引張力及び圧縮力は分散される。このため、加工性よく折り曲げ部２６を形成することができる。また、折り曲げ部２６を形成しても、第１封止部３の封止性能に影響を与えない。 FIG. 6 is a schematic cross-sectional view of the bent portion 26. Since the conductive portion 22 is bent at the bent portion 26, the laminated film 1 constituting the conductive portion accommodating portion 6 is also bent. A compressive force is applied to the laminated film 1 inside the bent portion 26, and a tensile force is applied to the laminated film 1 outside the bent portion 26. However, in the bent portion 26, since the conductive portion 22 and the laminated film 1 are not adhered to each other, the laminated film 1 can be displaced from the conductive portion 22, so that the tensile force and the compressive force applied to the laminated film 1 are dispersed. Will be done. Therefore, the bent portion 26 can be formed with good workability. Further, even if the bent portion 26 is formed, the sealing performance of the first sealing portion 3 is not affected.

例えば、折り曲げ部２６において導電部２２とラミネートフィルム１が接着されている場合、ラミネートフィルム１にかかる引張力及び圧縮力は分散されない。このため、折り曲げ部２６を形成するために大きな力が必要となり、加工性がよくない。また、折り曲げ部２６を形成すると、ラミネートフィルム１が導電部２２から剥がれる場合がある。この剥がれが生じると、剥がれが徐々に伝播し、第１封止部３の封止性能が低下し、第１封止部３から電解質２５が漏洩する場合がある。
第１封止部３（第１正極封止部３ａ又は第１負極封止部３ｂ）で電池を折り曲げたものと、図２の破線Ｅ−Ｅで電池を折曲げた場合を折曲げたものにヒートサイクル試験（-40℃〜75℃、50サイクル）を行ったところ、図２の破線Ｅ−Ｅで電池を折曲げたものでは電解液の漏れは確認できなかったが、第１封止部３で電池を折り曲げたものでは電解液が発電要素収容部５から漏れ出しているものが確認された。
従って、折り曲げ部２６において導電部２２とラミネートフィルム１が接着されていると密閉型電池３０の封止性能が低下する場合がある。 For example, when the conductive portion 22 and the laminated film 1 are adhered to each other in the bent portion 26, the tensile force and the compressive force applied to the laminated film 1 are not dispersed. Therefore, a large force is required to form the bent portion 26, and the workability is not good. Further, when the bent portion 26 is formed, the laminated film 1 may be peeled off from the conductive portion 22. When this peeling occurs, the peeling gradually propagates, the sealing performance of the first sealing portion 3 deteriorates, and the electrolyte 25 may leak from the first sealing portion 3.
A bent battery at the first sealing portion 3 (first positive electrode sealing portion 3a or the first negative electrode sealing portion 3b) and a bent battery at the broken line EE in FIG. When a heat cycle test (-40 ° C to 75 ° C, 50 cycles) was performed on the battery, leakage of the electrolytic solution could not be confirmed when the battery was bent along the broken line EE in Fig. 2, but the first sealing was performed. In the case where the battery was bent in the part 3, it was confirmed that the electrolytic solution leaked from the power generation element accommodating part 5.
Therefore, if the conductive portion 22 and the laminated film 1 are adhered to each other in the bent portion 26, the sealing performance of the sealed battery 30 may deteriorate.

次に、図１〜３、図５に示した密閉型電池３０を破線Ｂ−Ｂ、破線Ｃ−Ｃ、破線Ｄ−Ｄ、破線Ｅ−Ｅにおいて折り曲げた密閉型電池３０について説明する。図７（ａ）〜（ｅ）は、密閉型電池３０の折り曲げパターンの例を示した図である。
図７（ａ）（ｄ）のように、導電部収容部６が発電要素収容部５に巻きつくように破線Ｂ−Ｂ、破線Ｃ−Ｃ、破線Ｄ−Ｄ、破線Ｅ−Ｅで折り曲げ、正極外部接続端子２１ａと負極外部接続端子２１ｂとを発電要素収容部５の同じ側面に配置することができる。
図７（ｂ）（ｃ）のように、導電部収容部６が発電要素収容部５に巻きつくように破線Ｂ−Ｂ、破線Ｃ−Ｃ、破線Ｄ−Ｄ、破線Ｅ−Ｅで折り曲げ、正極外部接続部２１ａを発電要素収容部５の一方の側面に配置し、負極外部接続部２１ｂを他方の側面に配置することができる。
このような構成により、発電要素収容部５の広い方の側面が向かい合うように２つの密閉型電池３０を配置し、接続部３３において外部接続部２１を直接接続することができる。このため、２つの密閉型電池３０を容易に電気的に接続することができる。なお、接続部３３において外部接続部２１は、ボルトやクリップなどの留め具などにより接続されてもよく、溶接により接続されてもよく、はんだづけにより接続されてもよく、導電性テープにより接続されてもよく、導電性接着剤により接続されてもよい。 Next, the sealed battery 30 in which the sealed batteries 30 shown in FIGS. 1 to 5 are bent along the broken lines BB, the broken lines CC, the broken lines DD, and the broken lines EE will be described. 7 (a) to 7 (e) are views showing an example of a bending pattern of the sealed battery 30.
As shown in FIGS. 7 (a) and 7 (d), the conductive portion accommodating portion 6 is bent along the broken lines BB, the broken lines CC, the broken lines DD, and the broken lines EE so as to wind around the power generation element accommodating portion 5. The positive electrode external connection terminal 21a and the negative electrode external connection terminal 21b can be arranged on the same side surface of the power generation element accommodating portion 5.
As shown in FIGS. 7 (b) and 7 (c), the conductive portion accommodating portion 6 is bent along the broken lines BB, the broken lines CC, the broken lines DD, and the broken lines EE so as to wind around the power generation element accommodating portion 5. The positive electrode external connection portion 21a can be arranged on one side surface of the power generation element accommodating portion 5, and the negative electrode external connection portion 21b can be arranged on the other side surface.
With such a configuration, the two sealed batteries 30 can be arranged so that the wide side surfaces of the power generation element accommodating portion 5 face each other, and the external connecting portion 21 can be directly connected at the connecting portion 33. Therefore, the two sealed batteries 30 can be easily electrically connected. In the connecting portion 33, the external connecting portion 21 may be connected by a fastener such as a bolt or a clip, may be connected by welding, may be connected by soldering, or may be connected by a conductive tape. It may be connected by a conductive adhesive.

また、破線Ｂ−Ｂと破線Ｃ−Ｃ又は破線Ｄ−Ｄと破線Ｅ−Ｅで、谷折りと山折りを形成してもよい。図７（ｅ）では、破線Ｄ−Ｄと破線Ｅ−Ｅにおいて谷折りと山折りを形成している。
このような構成により、発電要素収容部５の狭い方の側面が向かい合うように２つの密閉型電池３０を配置した組電池３５を形成した際、２つの密閉型電池３０を容易に電気的に接続することができる。 Further, a valley fold and a mountain fold may be formed by the broken line BB and the broken line CC or the broken line DD and the broken line EE. In FIG. 7 (e), valley folds and mountain folds are formed at the broken lines DD and EE.
With such a configuration, when the assembled battery 35 in which the two sealed batteries 30 are arranged so that the narrow side surfaces of the power generation element accommodating portion 5 face each other is formed, the two sealed batteries 30 are easily electrically connected. can do.

折り曲げ部２６を形成した複数の密閉型電池３０を近接させて組み合わせて、隣接する２つの密閉型電池３０の外部接続部２１を接続部３３において接続し、組電池３５を形成することができる。導電部２２はラミネートフィルム１により覆われ絶縁されているため、このような組電池３５を形成してもリーク電流が流れることを抑制することができる。
図８（ａ）〜（ｅ）は、複数の密閉型電池３０が直列接続された組電池３５の概略上面図であり、図９（ａ）〜（ｅ）は、複数の密閉型電池３０が並列接続された組電池３５又は直列接続された複数の密閉型電池３０が並列接続された組電池３５の概略上面図である。 A plurality of sealed batteries 30 having a bent portion 26 formed therein can be combined in close proximity to each other, and the external connecting portions 21 of two adjacent sealed batteries 30 can be connected at the connecting portion 33 to form the assembled battery 35. Since the conductive portion 22 is covered with the laminated film 1 and insulated, it is possible to suppress the flow of leakage current even if such an assembled battery 35 is formed.
8 (a) to 8 (e) are schematic top views of the assembled battery 35 in which a plurality of sealed batteries 30 are connected in series, and FIGS. 9 (a) to 9 (e) show the plurality of sealed batteries 30. It is a schematic top view of the assembled battery 35 in which the assembled battery 35 connected in parallel or a plurality of sealed batteries 30 connected in series are connected in parallel.

図７（ａ）（ｄ）のように、外部接続部２１が密閉型電池３０の広いほうの側面に位置するように折り曲げた密閉型電池３０を組み合わせ隣接する２つの密閉型電池３０の正極外部接続部２１ａと負極外部接続部２１ｂとを接続部３３で接続することにより、図８（ａ）（ｂ）のような直列接続した組電池３５又は図９（ａ）のような並列接続した組電池３５を形成することができる。
また、図７（ｅ）のように谷折りと山折りとなるように折り曲げた密閉型電池３０と、外部接続部２１が密閉型電池３０の広いほうの側面に位置するように折り曲げた密閉型電池３０とを狭いほうの側面が向かい合うように組み合わせることにより、図８（ｃ）（ｄ）のような直列接続された組電池３５を形成することができる。
また、図７（ｅ）のように谷折りと山折りとなるように折り曲げた密閉型電池３０と、外部接続部２１が密閉型電池３０の広いほうの側面に位置するように折り曲げた密閉型電池３０とを組み合わせることにより、図８（ｅ）のような直列接続された組電池３５又は図９（ｂ）（ｃ）のような直列接続された密閉型電池３０が並列接続された組電池３５を形成することができる。
このように本実施形態の組電池３５では、無駄なスペースを設けることなく組電池３５を形成することができる。
図７〜９はバスバーを使用しない好ましい形態の組電池を例示しているのであって、組電池にバスバーを用いることを何ら妨げるものではない。 As shown in FIGS. 7A and 7D, the positive electrode outside of the two adjacent sealed batteries 30 is combined with the sealed batteries 30 bent so that the external connection portion 21 is located on the wider side surface of the sealed battery 30. By connecting the connection portion 21a and the negative electrode external connection portion 21b with the connection portion 33, the assembled batteries 35 connected in series as shown in FIGS. 8 (a) and 8 (b) or the assembled batteries connected in parallel as shown in FIG. 9 (a). The battery 35 can be formed.
Further, as shown in FIG. 7E, the sealed battery 30 is bent so as to be a valley fold and a mountain fold, and the sealed type is bent so that the external connection portion 21 is located on the wider side surface of the sealed battery 30. By combining the batteries 30 so that the narrow side surfaces face each other, it is possible to form the assembled battery 35 connected in series as shown in FIGS. 8 (c) and 8 (d).
Further, as shown in FIG. 7E, the sealed battery 30 is bent so as to be a valley fold and a mountain fold, and the sealed type is bent so that the external connection portion 21 is located on the wider side surface of the sealed battery 30. By combining with the battery 30, the assembled battery 35 connected in series as shown in FIG. 8 (e) or the sealed battery 30 connected in series as shown in FIGS. 9 (b) and 9 (c) is connected in parallel. 35 can be formed.
As described above, in the assembled battery 35 of the present embodiment, the assembled battery 35 can be formed without providing a wasted space.
FIGS. 7 to 9 exemplify a preferred form of the assembled battery that does not use the bus bar, and does not prevent the use of the bus bar as the assembled battery.

１： ラミネートフィルム ２：溶着部 ３：第１封止部 ３ａ：第１正極封止部 ３ｂ：第１負極封止部 ４：第２封止部 ４ａ：第２正極封止部 ４ｂ：第２負極封止部 ５：発電要素収容部 ６：導電部収容部 ６ａ：正極導電部収容部 ６ｂ：負極導電部収容部 １０：発電要素 １１：電極シート １１ａ：正極シート １１ｂ：負極シート １２：正極活物質層 １３：負極活物質層 １４：正極集電シート １５：負極集電シート １６：セパレータ ２０：電極接続端子 ２０ａ：正極接続端子 ２０ｂ：負極接続端子 ２１：外部接続部 ２１ａ：正極外部接続部 ２１ｂ：負極外部接続部 ２２：導電部 ２２ａ：正極導電部 ２２ｂ：負極導電部 ２３：電極接続部 ２３ａ：正極接続部 ２３ｂ：負極接続部 ２５：電解質 ２６：折り曲げ部 ３０、３０ａ、３０ｂ、３０ｃ、３０ｄ、３０ｅ、３０ｆ：密閉型電池 ３１：正極側終端 ３２：負極側終端 ３３：接続部 ３５：組電池 1: Laminated film 2: Welding part 3: First sealing part 3a: First positive electrode sealing part 3b: First negative electrode sealing part 4: Second sealing part 4a: Second positive electrode sealing part 4b: Second Negative electrode sealing part 5: Power generation element accommodating part 6: Conductive part accommodating part 6a: Positive electrode conductive part accommodating part 6b: Negative electrode conductive part accommodating part 10: Power generation element 11: Electrode sheet 11a: Positive electrode sheet 11b: Negative electrode sheet 12: Positive electrode activity Material layer 13: Negative electrode active material layer 14: Positive electrode current collecting sheet 15: Negative electrode current collecting sheet 16: Separator 20: Electrode connection terminal 20a: Positive electrode connection terminal 20b: Negative electrode connection terminal 21: External connection part 21a: Positive electrode external connection part 21b : Negative electrode external connection part 22: Conductive part 22a: Positive electrode conductive part 22b: Negative electrode conductive part 23: Electrode connection part 23a: Positive electrode connection part 23b: Negative electrode connection part 25: Electrolyte 26: Bent part 30, 30a, 30b, 30c, 30d , 30e, 30f: Sealed battery 31: Positive electrode side termination 32: Negative electrode side termination 33: Connection part 35: Assembled battery

Claims (8)

電極シート及びセパレータを含む発電要素と、前記発電要素を挟むように設けられたラミネートフィルムと、前記電極シートに接続する電極接続端子と、電解質とを備え、
前記ラミネートフィルムは、前記ラミネートフィルムを重ねて溶着した溶着部と、前記電極接続端子を前記ラミネートフィルムで挟んで溶着した第１封止部とにより密封された発電要素収容部を形成し、
前記発電要素及び前記電解質は、前記発電要素収容部内に収容され、
前記電極接続端子は、外部接続するための外部接続部と、前記外部接続部と第１封止部との間に設けられた導電部とを有し、
前記ラミネートフィルムは、導電部収容部を有し、
前記導電部収容部は、第１封止部と対向した側端部が閉じられ上部及び下部が開いた形状を有し、
前記外部接続部は、前記ラミネートフィルムにより覆われないように設けられ、かつ、前記導電部収容部の上部から外部へ突出するように設けられ、
前記導電部は、前記導電部収容部の内部において前記ラミネートフィルムにより非接着で覆われることを特徴とする密閉型電池。 A power generation element including an electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, an electrode connection terminal connected to the electrode sheet, and an electrolyte are provided.
The laminated film forms a power generation element accommodating portion sealed by a welded portion in which the laminated film is laminated and welded, and a first sealing portion in which the electrode connection terminal is sandwiched between the laminated films and welded.
The power generation element and the electrolyte are housed in the power generation element accommodating portion.
The electrode connection terminal has an external connection portion for external connection and a conductive portion provided between the external connection portion and the first sealing portion.
The laminated film has a conductive portion accommodating portion and has a conductive portion accommodating portion.
The conductive portion accommodating portion has a shape in which the side end portion facing the first sealing portion is closed and the upper and lower portions are open.
The external connecting portion is provided so as not to be covered with the laminated film, and is provided so as to project outward from the upper portion of the conductive portion accommodating portion.
A sealed battery characterized in that the conductive portion is covered with the laminated film inside the conductive portion accommodating portion without adhesion. 前記ラミネートフィルムは、前記導電部収容部の側端部に前記ラミネートフィルムを重ねて溶着した溶着部を有する請求項１に記載の密閉型電池。 The laminate film sealed battery according to claim 1 having a welded portion which is welded on top of the laminate film side end portion of the conductive portion housing portion. 正極シート、負極シート及びセパレータを含む発電要素と、前記発電要素を挟むように設けられたラミネートフィルムと、前記正極シートに接続する正極接続端子と、前記負極シートに接続する負極接続端子と、電解質とを備え、
前記ラミネートフィルムは、前記ラミネートフィルムを重ねて溶着した溶着部と、前記正極接続端子を前記ラミネートフィルムで挟んで溶着した第１正極封止部と、前記負極接続端子を前記ラミネートフィルムで挟んで溶着した第１負極封止部とにより密封された発電要素収容部を形成し、
前記発電要素及び前記電解質は、前記発電要素収容部内に収容され、
前記正極接続端子は、外部接続するための正極外部接続部と、前記正極外部接続部と第１正極封止部との間に設けられた正極導電部とを有し、
前記負極接続端子は、外部接続するための負極外部接続部と、前記負極外部接続部と第１負極封止部との間に設けられた負極導電部とを有し、
前記ラミネートフィルムは、正極導電部収容部と負極導電部収容部とを有し、
前記正極導電部収容部は、第１正極封止部と対向した側端部が閉じられ上部及び下部が開いた形状を有し、
前記負極導電部収容部は、第１負極封止部と対向した側端部が閉じられ上部及び下部が開いた形状を有し、
前記正極外部接続部及び前記負極外部接続部は、前記ラミネートフィルムにより覆われないように設けられ、
前記正極導電部は、前記正極導電部収容部において前記ラミネートフィルムにより非接着で覆われ、
前記負極導電部は、前記負極導電部収容部において前記ラミネートフィルムにより非接着で覆われ、
前記正極シートは、前記正極接続端子に接続する正極集電シートと、前記正極集電シート上に設けられた正極活物質層とを有し、
前記負極シートは、前記負極接続端子に接続する負極集電シートと、前記負極集電シート上に設けられた負極活物質層とを有し、
前記発電要素は、前記正極活物質層、前記負極活物質層及び前記セパレータが重なった部分と、前記正極接続端子との間の正極集電シートにおいて折り曲げることができるように設けられ、かつ、前記正極活物質層、前記負極活物質層及び前記セパレータが重なった部分と、前記負極接続端子との間の負極集電シートにおいて折り曲げることができるように設けられた密閉型電池。 A power generation element including a positive electrode sheet, a negative electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, a positive electrode connection terminal connected to the positive electrode sheet, a negative electrode connection terminal connected to the negative electrode sheet, and an electrolyte. With and
The laminated film is welded by sandwiching a welded portion in which the laminated films are laminated and welded, a first positive electrode sealing portion in which the positive electrode connecting terminal is sandwiched between the laminated films, and the negative electrode connecting terminal sandwiched between the laminated films. A power generation element accommodating portion sealed with the first negative electrode sealing portion formed therein is formed.
The power generation element and the electrolyte are housed in the power generation element accommodating portion.
The positive electrode connection terminal has a positive electrode external connection portion for external connection and a positive electrode conductive portion provided between the positive electrode external connection portion and the first positive electrode sealing portion.
The negative electrode connection terminal has a negative electrode external connection portion for external connection and a negative electrode conductive portion provided between the negative electrode external connection portion and the first negative electrode sealing portion.
The laminated film has a positive electrode conductive portion accommodating portion and a negative electrode conductive portion accommodating portion.
The positive electrode conductive portion accommodating portion has a shape in which the side end portion facing the first positive electrode sealing portion is closed and the upper and lower portions are open.
The negative electrode conductive portion accommodating portion has a shape in which the side end portion facing the first negative electrode sealing portion is closed and the upper and lower portions are open.
The positive electrode external connection portion and the negative electrode external connection portion are provided so as not to be covered with the laminated film.
The positive electrode conductive portion is covered with the laminated film in the positive electrode conductive portion accommodating portion without adhesion.
The negative electrode conductive portion is covered with the laminated film in the negative electrode conductive portion accommodating portion without adhesion.
The positive electrode sheet has a positive electrode current collector sheet connected to the positive electrode connection terminal and a positive electrode active material layer provided on the positive electrode current collector sheet.
The negative electrode sheet has a negative electrode current collector sheet connected to the negative electrode connection terminal and a negative electrode active material layer provided on the negative electrode current collector sheet.
The power generating element, the positive active material layer, the negative electrode active material layer and the separator is overlapped part is provided such that it can be folded at the positive electrode current collector sheet between the positive electrode connection terminal, and , the positive active material layer, the negative electrode active material layer and the separator is overlapped part, dense closed cell provided to be able to bend in the negative electrode current collector sheet between the negative electrode connection terminal. 正極シート、負極シート及びセパレータを含む発電要素と、前記発電要素を挟むように設けられたラミネートフィルムと、前記正極シートに接続する正極接続端子と、前記負極シートに接続する負極接続端子と、電解質とを備え、
前記ラミネートフィルムは、前記ラミネートフィルムを重ねて溶着した溶着部と、前記正極接続端子を前記ラミネートフィルムで挟んで溶着した第１正極封止部と、前記負極接続端子を前記ラミネートフィルムで挟んで溶着した第１負極封止部とにより密封された発電要素収容部を形成し、
前記発電要素及び前記電解質は、前記発電要素収容部内に収容され、
前記正極接続端子は、外部接続するための正極外部接続部と、前記正極外部接続部と第１正極封止部との間に設けられた正極導電部とを有し、
前記負極接続端子は、外部接続するための負極外部接続部と、前記負極外部接続部と第１負極封止部との間に設けられた負極導電部とを有し、
前記ラミネートフィルムは、正極導電部収容部と負極導電部収容部とを有し、
前記正極導電部収容部は、第１正極封止部と対向した側端部が閉じられ上部及び下部が開いた形状を有し、
前記負極導電部収容部は、第１負極封止部と対向した側端部が閉じられ上部及び下部が開いた形状を有し、
前記正極外部接続部及び前記負極外部接続部は、前記ラミネートフィルムにより覆われないように設けられ、
前記正極導電部は、前記正極導電部収容部において前記ラミネートフィルムにより非接着で覆われ、
前記負極導電部は、前記負極導電部収容部において前記ラミネートフィルムにより非接着で覆われ、
前記正極導電部及び前記負極導電部は、折り曲げ部を有する密閉型電池。 A power generation element including a positive electrode sheet, a negative electrode sheet and a separator, a laminate film provided so as to sandwich the power generation element, a positive electrode connection terminal connected to the positive electrode sheet, a negative electrode connection terminal connected to the negative electrode sheet, and an electrolyte. With and
The laminated film is welded by sandwiching a welded portion in which the laminated films are laminated and welded, a first positive electrode sealing portion in which the positive electrode connecting terminal is sandwiched between the laminated films, and the negative electrode connecting terminal sandwiched between the laminated films. A power generation element accommodating portion sealed with the first negative electrode sealing portion formed therein is formed.
The power generation element and the electrolyte are housed in the power generation element accommodating portion.
The positive electrode connection terminal has a positive electrode external connection portion for external connection and a positive electrode conductive portion provided between the positive electrode external connection portion and the first positive electrode sealing portion.
The negative electrode connection terminal has a negative electrode external connection portion for external connection and a negative electrode conductive portion provided between the negative electrode external connection portion and the first negative electrode sealing portion.
The laminated film has a positive electrode conductive portion accommodating portion and a negative electrode conductive portion accommodating portion.
The positive electrode conductive portion accommodating portion has a shape in which the side end portion facing the first positive electrode sealing portion is closed and the upper and lower portions are open.
The negative electrode conductive portion accommodating portion has a shape in which the side end portion facing the first negative electrode sealing portion is closed and the upper and lower portions are open.
The positive electrode external connection portion and the negative electrode external connection portion are provided so as not to be covered with the laminated film.
The positive electrode conductive portion is covered with the laminated film in the positive electrode conductive portion accommodating portion without adhesion.
The negative electrode conductive portion is covered with the laminated film in the negative electrode conductive portion accommodating portion without adhesion.
The positive electrode conductive part and the negative electrode conductive part is tightly closed cell that having a bent portion. 前記正極外部接続部は、前記正極導電部収容部の上部から外部へ突出するように設けられ、
前記負極外部接続部は、前記負極導電部収容部の上部から外部へ突出するように設けられた請求項３又は４に記載の密閉型電池。 The positive electrode external connection portion is provided so as to protrude from an upper portion of the positive electrode conductive part accommodating portion to outside,
The sealed battery according to claim 3 or 4 , wherein the negative electrode external connection portion is provided so as to project outward from the upper portion of the negative electrode conductive portion accommodating portion. 前記正極外部接続部は、前記正極導電部収容部の側端部から外部へ突出するように設けられ、
前記負極外部接続部は、前記負極導電部収容部の側端部から外部へ突出するように設けられた請求項３又は４に記載の密閉型電池。 The positive electrode external connection portion is provided from the side end portion of the positive electrode conductive part accommodating portion so as to protrude to the outside,
The sealed battery according to claim 3 or 4 , wherein the negative electrode external connection portion is provided so as to project outward from a side end portion of the negative electrode conductive portion accommodating portion. 前記発電要素収容部は、前記正極導電部収容部と前記負極導電部収容部との間に配置された請求項３〜６のいずれか１つに記載の密閉型電池。 The sealed battery according to any one of claims 3 to 6, wherein the power generation element accommodating portion is arranged between the positive electrode conductive portion accommodating portion and the negative electrode conductive portion accommodating portion. 請求項４に記載の密閉型電池を複数備え、
隣接する２つの密閉型電池の前記正極外部接続部又は前記負極外部接続部を接続した組電池。 A plurality of sealed batteries according to claim 4 are provided.
An assembled battery in which the positive electrode external connection portion or the negative electrode external connection portion of two adjacent sealed batteries is connected.
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