JP5742610B2 - Battery and battery manufacturing method - Google Patents

Battery and battery manufacturing method Download PDF

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JP5742610B2
JP5742610B2 JP2011196497A JP2011196497A JP5742610B2 JP 5742610 B2 JP5742610 B2 JP 5742610B2 JP 2011196497 A JP2011196497 A JP 2011196497A JP 2011196497 A JP2011196497 A JP 2011196497A JP 5742610 B2 JP5742610 B2 JP 5742610B2
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space
sealing member
battery
battery case
gas
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JP2013058409A (en
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貴司 原山
貴司 原山
草間　和幸
和幸 草間
松浦　智浩
智浩 松浦
純太 高須
純太 高須
後藤　哲也
哲也 後藤
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Description

本発明は、自身の内外を連通する貫通孔を有する電池ケースと、この電池ケース内に収容された電極体と、電池ケースの貫通孔を外部から気密に封止してなる封止部材とを備える電池及び電池の製造方法に関する。   The present invention includes a battery case having a through-hole communicating with the inside and outside of the battery case, an electrode body housed in the battery case, and a sealing member formed by sealing the through-hole of the battery case from the outside. The present invention relates to a battery and a battery manufacturing method.

従来より、電解液を注入するための注液孔などの貫通孔を有する電池ケースと、この電池ケースに収容された電極体と、電池ケースの貫通孔を外部から気密に封止した封止部材とを備える電池が知られている。封止部材としては、例えば、金属からなる金属蓋部材に、ゴム状弾性体からなるゴム栓部材が接合されたものがある。このうちゴム栓部材は、電池ケースの貫通孔に外部から圧入されており、貫通孔を気密に封止（密栓）する。一方、金属蓋部材は、このゴム栓部材を電池ケースの外部から覆いつつ、ゴム栓部材を電池ケースの内部に向けて押圧した状態で、電池ケースに接合されている。このようにすることで、ゴム栓部材による貫通孔の気密封止をより確実なものとすることができる。
なお、このようなゴム栓部材及び金属蓋部材を有する封止部材で貫通孔を封止した形態の電池として、例えば特許文献１に開示された電池が挙げられる。 Conventionally, a battery case having a through hole such as a liquid injection hole for injecting an electrolyte, an electrode body accommodated in the battery case, and a sealing member that hermetically seals the through hole of the battery case from the outside Are known. As the sealing member, for example, there is a member in which a rubber plug member made of a rubber-like elastic body is joined to a metal lid member made of metal. Among these, the rubber plug member is press-fitted into the through hole of the battery case from the outside, and the through hole is hermetically sealed (tightly plugged). On the other hand, the metal lid member is bonded to the battery case in a state where the rubber plug member is pressed toward the inside of the battery case while covering the rubber plug member from the outside of the battery case. By doing in this way, the airtight sealing of the through-hole by a rubber plug member can be made more reliable.
In addition, as a battery of the form which sealed the through-hole with the sealing member which has such a rubber plug member and a metal cover member, the battery disclosed by patent document 1 is mentioned, for example.

特開２００９−８７６５９号公報JP 2009-87659 A

従来の電池では、前述のように、貫通孔の気密封止はゴム栓部材で行えば足りると考えられていたため、金属蓋部材と電池ケースとの間の気密性まで厳密に要求されることはなかった。しかしながら、ゴム状弾性体からなるゴム栓部材は、経時的に劣化するため、ゴム栓部材と貫通孔との間の気密性も経時的に低下する。特に、ハイブリッド自動車や電気自動車などの車載用の電池は、例えば１０年以上の長期間にわたり使用されるため、この経時劣化による気密性の低下が懸念される。   In the conventional battery, as described above, it was considered that the hermetic sealing of the through hole should be performed by the rubber plug member. Therefore, strictly speaking, the airtightness between the metal lid member and the battery case is strictly required. There wasn't. However, since the rubber plug member made of a rubber-like elastic material deteriorates with time, the airtightness between the rubber plug member and the through hole also decreases with time. In particular, in-vehicle batteries such as hybrid vehicles and electric vehicles are used for a long period of time, for example, 10 years or more, and there is a concern that the airtightness may decrease due to the deterioration with time.

ゴム栓部材が劣化してゴム栓部材と貫通孔との間の気密性が低下すると、電池ケース内に収容されていた電解液が、ゴム栓部材と貫通孔との間に入り込み、更に、金属蓋部材と電池ケースとの間の気密性も低い場合には、その電解液が金属蓋部材と電池ケースとの間を通じて電池外部まで漏れ出てしまうことがある。すると、電池ケース内の電解液が不足して、電池特性が低下するおそれがある。また逆に、金属蓋部材と電池ケースとの間、及び、ゴム栓部材と貫通孔との間を通じて、大気中の水分が電池ケース内に入り込み、電池特性が低下するおそれもある。   When the rubber plug member deteriorates and the airtightness between the rubber plug member and the through hole is reduced, the electrolyte contained in the battery case enters between the rubber plug member and the through hole, and further, the metal When the airtightness between the lid member and the battery case is low, the electrolyte may leak to the outside of the battery through between the metal lid member and the battery case. As a result, the electrolyte in the battery case is insufficient, and the battery characteristics may deteriorate. Conversely, moisture in the atmosphere may enter the battery case between the metal lid member and the battery case, and between the rubber plug member and the through hole, and the battery characteristics may deteriorate.

この問題を解決するため、ゴム栓部材が劣化してゴム栓部材と貫通孔との間の気密性が低下しても、電池ケースの内部と外部が連通しないように、金属蓋部材と電池ケースとの間を確実に気密かつ環状に接合しておくことが考えられる。
しかしながら、このようにした電池は、製造直後にはゴム栓部材がまだ劣化しておらず、ゴム栓部材と貫通孔との間が気密に封止されている。つまり、この電池は、ゴム栓部材と貫通孔との密着、及び、金属蓋部材と電池ケースとの接合により、二重に封止されている。このため、金属蓋部材と電池ケースとの接合の不具合で封止不良が生じていたとしても、この封止不良が生じた電池を検査により判別するのが困難であった。 In order to solve this problem, even if the rubber plug member deteriorates and the airtightness between the rubber plug member and the through hole is reduced, the metal lid member and the battery case are prevented from communicating with each other. It is conceivable to ensure airtight and annular bonding between the two.
However, in such a battery, the rubber plug member has not yet deteriorated immediately after manufacture, and the gap between the rubber plug member and the through hole is hermetically sealed. That is, this battery is double-sealed by the close contact between the rubber plug member and the through hole and the joining of the metal lid member and the battery case. For this reason, even if a sealing failure occurs due to a failure in joining the metal lid member and the battery case, it is difficult to determine the battery in which the sealing failure has occurred by inspection.

本発明は、かかる現状に鑑みてなされたものであって、電池ケースの貫通孔を気密に封止した内側封止部材と、この内側封止部材を外部から覆いつつ、電池ケースに気密かつ環状に固着した外側封止部材とを備える電池において、外側封止部材と電池ケースとの間の気密性を容易かつ確実に検査できる電池及び電池の製造方法を提供することを目的とする。   The present invention has been made in view of such a situation, and is provided with an inner sealing member that hermetically seals a through hole of a battery case, and an airtight and annular shape around the battery case while covering the inner sealing member from the outside. An object of the present invention is to provide a battery and a battery manufacturing method that can easily and reliably inspect the airtightness between the outer sealing member and the battery case.

上記課題を解決するための本発明の一態様は、自身の内外を連通する貫通孔を有する電池ケースと、前記電池ケース内に収容された電極体と、ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、前記封止空間内に存在する気体である空間内気体は、前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、前記封止空間へ前記検知可能気体を供給する気体供給体を有し、前記電池ケースのうち、前記封止空間を臨む部位を、第１臨空間部とし、前記内側封止部材のうち、前記封止空間を臨む部位を、第２臨空間部とし、前記外側封止部材のうち、前記封止空間を臨む部位を、第３臨空間部としたとき、前記気体供給体は、前記第１臨空間部、前記第２臨空間部、及び、前記第３臨空間部の少なくともいずれかの上に配置されてなる電池である。 One aspect of the present invention for solving the above-described problem is a battery case having a through-hole communicating with the inside and outside of the battery case, an electrode body accommodated in the battery case, and a rubber-like elastic body. An inner sealing member having a rubber plug portion hermetically sealed from the outside of the battery case, and an annular hole surrounding the through hole in the battery case while covering the inner sealing member from the outside An outer sealing member that is hermetically and annularly fixed to the surrounding portion, and an airtightly sealed space formed between the battery case, the inner sealing member, and the outer sealing member. When the sealed space is used, the gas in the space, which is the gas present in the sealed space, can be detected separately from the gas components in the atmosphere when leaked from the sealed space to the outside of the battery. Gas that contains the detectable gas into the sealed space Have a supply gas supply member, the one of the battery case, wherein a portion facing the sealing space, Shun first Rinku The inter, of the inner sealing member, a portion facing the sealing space, the second When the portion that faces the sealing space in the outer sealing member is the third space portion, the gas supply body includes the first space portion and the second space portion. And a battery that is disposed on at least one of the third critical spaces .

この電池では、内側封止部材が電池ケースの貫通孔を気密に封止すると共に、外側封止部材がこの内側封止部材を外部から覆って電池ケースの孔周囲部に気密かつ環状に固着している。従って、貫通孔は、これら内側封止部材及び外側封止部材により二重にシールされている。しかし、この電池では、電池ケースと内側封止部材と外側封止部材との間に形成された封止空間内の空間内気体が、封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含む。また、この電池は、この検知可能気体を封止空間に供給する気体供給体を有する。   In this battery, the inner sealing member hermetically seals the through hole of the battery case, and the outer sealing member covers the inner sealing member from the outside and is fixed in an airtight and annular manner around the hole of the battery case. ing. Therefore, the through hole is double-sealed by the inner sealing member and the outer sealing member. However, in this battery, when the gas in the sealed space formed between the battery case, the inner sealing member, and the outer sealing member leaks out of the battery from the sealed space, Detectable gas that can be detected separately from gas components. In addition, the battery includes a gas supply body that supplies the detectable gas to the sealed space.

このため、内側封止部材で貫通孔が気密に封止されているにも拘わらず、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。即ち、気体供給体から封止空間に供給された検知可能気体が、封止空間から電池外部に漏れ出るか否かを検査することにより、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。
更に、この電池では、気体供給体が、封止空間を臨む部位である第１臨空間部、第２臨空間部及び第３臨空間部の少なくともいずれかの上に配置されている。このため、気体供給体から発生した検知可能気体を、確実に封止空間内に供給できる。 For this reason, although the through hole is hermetically sealed by the inner sealing member, the airtightness between the outer sealing member and the battery case (periphery portion of the hole) can be easily and reliably inspected. That is, by inspecting whether or not the detectable gas supplied from the gas supply body to the sealed space leaks out of the battery from the sealed space, the outer sealing member and the battery case (the hole surrounding portion) It is possible to easily and reliably inspect the airtightness between the two.
Furthermore, in this battery, the gas supply body is disposed on at least one of the first living space portion, the second living space portion, and the third living space portion, which is a portion facing the sealing space. For this reason, the detectable gas generated from the gas supply body can be reliably supplied into the sealed space.

なお、「検知可能気体」としては、例えば、メタノール、エタノール、トルエン、キシレン、ベンゼン、アセトン、６−エトキシ−２，２，４−トリメチル−１，２−ジヒドロキノリン、ナフタレン、パラジクロロベンゼン、ステアリン酸、Ｎ−イソプロピル−Ｎ’−フェニル−ｐ−フェニレンジアミン、Ｎ−１，３−ジメチルブチル−Ｎ’−フェニル−ｐ−フェニレンジアミン、ジエチレングリコールモノブチルエーテルなどの有機化合物のガス、或いは、ヘリウムガス、アルゴンガス、水素ガス、炭酸ガス、臭素ガスなど、無機物のガスが挙げられる。
また、「空間内気体」は、その全てが検知可能気体のみからなるものとしても、或いは、その一部にのみ検知可能気体を含むものとしてもよい。空間内気体の一部にのみ検知可能気体を含む場合、検知可能気体以外の気体成分としては、例えば、大気や窒素ガスなどを用いることができる。 Examples of the “detectable gas” include methanol, ethanol, toluene, xylene, benzene, acetone, 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, naphthalene, paradichlorobenzene, and stearic acid. N-isopropyl-N′-phenyl-p-phenylenediamine, N-1,3-dimethylbutyl-N′-phenyl-p-phenylenediamine, organic compound gas such as diethylene glycol monobutyl ether, helium gas, argon Examples include inorganic gases such as gas, hydrogen gas, carbon dioxide gas, and bromine gas.
The “space gas” may be composed entirely of detectable gas or may include detectable gas only in a part thereof. When a detectable gas is included in only a part of the gas in the space, for example, air or nitrogen gas can be used as a gas component other than the detectable gas.

「気体供給体」は、後述するように、例えば、電池ケース、内側封止部材及び外側封止部材のうち、封止空間を臨む部位上に配置することができる。或いは、内側封止部材のゴム栓部のうち、封止空間に臨む部位自身を気体供給体とすることもできる。
また、「気体供給体」としては、例えば、ガス化して検知可能気体となる物質（液体または固体）を含む塗膜、接着層、ゲルが挙げられる。また、検知可能気体自身を、或いはガス化して検知可能気体となる物質（液体または固体）を内包したマイクロカプセル、ガス化して検知可能気体となる物質（液体）を含浸させたスポンジなども挙げられる。 As will be described later, the “gas supply body” can be disposed, for example, on a portion of the battery case, the inner sealing member, and the outer sealing member that faces the sealing space. Or the site | part itself which faces sealing space among the rubber plug parts of an inner side sealing member can also be made into a gas supply body.
Examples of the “gas supplier” include a coating film, an adhesive layer, and a gel containing a substance (liquid or solid) that is gasified to become a detectable gas. In addition, a microcapsule containing a detectable gas itself or a substance (liquid or solid) that is gasified to become a detectable gas, a sponge impregnated with a substance (liquid) that is gasified to become a detectable gas, and the like are also included. .

また、他の態様は、自身の内外を連通する貫通孔を有する電池ケースと、前記電池ケース内に収容された電極体と、ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、前記封止空間内に存在する気体である空間内気体は、前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、前記封止空間へ前記検知可能気体を供給する気体供給体を有し、前記内側封止部材の前記ゴム栓部のうち、少なくとも、前記封止空間に臨む部位である臨空間部自身が、前記気体供給体を兼ねる電池である。In another aspect, the battery case includes a battery case having a through hole communicating with the inside and the outside of the battery case, an electrode body accommodated in the battery case, and a rubber-like elastic body, and the through hole is formed from the outside of the battery case. An inner sealing member having a rubber plug portion hermetically sealed, and an annular hole surrounding portion of the battery case surrounding the through hole in the battery case while covering the inner sealing member from the outside in an airtight and annular manner A sealed outer space formed between the battery case, the inner sealing member, and the outer sealing member. The gas in the space that is a gas existing in the sealed space includes a detectable gas that can be detected separately from the gas component in the atmosphere when leaked from the sealed space to the outside of the battery, Has a gas supply to supply the detectable gas to the space , Of the rubber stopper portion of the inner sealing member, at least, the Rinku The inter itself is a portion facing the sealing space is a battery which also serves as the gas supply member.

この電池では、内側封止部材が電池ケースの貫通孔を気密に封止すると共に、外側封止部材がこの内側封止部材を外部から覆って電池ケースの孔周囲部に気密かつ環状に固着している。従って、貫通孔は、これら内側封止部材及び外側封止部材により二重にシールされている。しかし、この電池では、電池ケースと内側封止部材と外側封止部材との間に形成された封止空間内の空間内気体が、封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含む。また、この電池は、この検知可能気体を封止空間に供給する気体供給体を有する。
このため、内側封止部材で貫通孔が気密に封止されているにも拘わらず、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。即ち、気体供給体から封止空間に供給された検知可能気体が、封止空間から電池外部に漏れ出るか否かを検査することにより、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。
更に、この電池では、内側封止部材のゴム栓部のうち、少なくとも、封止空間に臨む部位である臨空間部自身が、気体供給体を兼ねる。このため、気体供給体を別途設ける必要がなく、しかも、ゴム栓部の臨空間部から発生した検知可能気体を、確実に封止空間に供給できる。なお、このような気体供給体としては、例えば、ゴム栓部の少なくとも臨空間部に、ガス化して検知可能気体となる物質やこれを内包したマイクロカプセルを含めたものが挙げられる。 In this battery, the inner sealing member hermetically seals the through hole of the battery case, and the outer sealing member covers the inner sealing member from the outside and is fixed in an airtight and annular manner around the hole of the battery case. ing. Therefore, the through hole is double-sealed by the inner sealing member and the outer sealing member. However, in this battery, when the gas in the sealed space formed between the battery case, the inner sealing member, and the outer sealing member leaks out of the battery from the sealed space, Detectable gas that can be detected separately from gas components. In addition, the battery includes a gas supply body that supplies the detectable gas to the sealed space.
For this reason, although the through hole is hermetically sealed by the inner sealing member, the airtightness between the outer sealing member and the battery case (periphery portion of the hole) can be easily and reliably inspected. That is, by inspecting whether or not the detectable gas supplied from the gas supply body to the sealed space leaks out of the battery from the sealed space, the outer sealing member and the battery case (the hole surrounding portion) It is possible to easily and reliably inspect the airtightness between the two.
Furthermore, in this battery, at least the living space portion itself, which is the portion facing the sealing space, of the rubber plug portion of the inner sealing member also serves as the gas supply body. For this reason, it is not necessary to separately provide a gas supply body, and the detectable gas generated from the near space portion of the rubber plug portion can be reliably supplied to the sealed space. Examples of such a gas supply body include a gas plug that includes a substance that is gasified into a detectable gas and a microcapsule containing the substance in at least a space portion of the rubber plug portion.

また、他の態様は、自身の内外を連通する貫通孔を有する電池ケースと、前記電池ケース内に収容された電極体と、ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、前記封止空間内に存在する気体である空間内気体は、前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、前記封止空間へ前記検知可能気体を供給する気体供給体を有する電池の製造方法であって、前記電池ケースの前記貫通孔を、前記外部から前記内側封止部材の前記ゴム栓部で塞いで、前記貫通孔を気密に封止する第１封止工程と、前記第１封止工程の後、前記内側封止部材を前記外部から覆いつつ、前記外側封止部材を前記電池ケースの前記孔周囲部に気密かつ環状に固着し、前記封止空間を形成する第２封止工程と、少なくとも前記第２封止工程よりも前に、前記電池ケースのうち、前記封止空間を臨む部位である第１臨空間部、前記内側封止部材のうち、前記封止空間を臨む部位である第２臨空間部、及び、前記外側封止部材のうち、前記封止空間を臨む部位である第３臨空間部の少なくともいずれかの上に、前記気体供給体を配置する供給体配置工程、または、前記第１封止工程よりも前に、前記内側封止部材の前記ゴム栓部のうち、少なくとも、前記封止空間に臨む部位である臨空間部自身を前記気体供給体とする供給体形成工程と、を備える電池の製造方法である。 In another aspect, the battery case includes a battery case having a through hole communicating with the inside and the outside of the battery case, an electrode body accommodated in the battery case, and a rubber-like elastic body, and the through hole is formed from the outside of the battery case. An inner sealing member having a rubber plug portion hermetically sealed, and an annular hole surrounding portion of the battery case surrounding the through hole in the battery case while covering the inner sealing member from the outside in an airtight and annular manner A sealed outer space formed between the battery case, the inner sealing member, and the outer sealing member. The gas in the space that is a gas existing in the sealed space includes a detectable gas that can be detected separately from the gas component in the atmosphere when leaked from the sealed space to the outside of the battery, Has a gas supply to supply the detectable gas to the space A first sealing step of sealing the through hole in an airtight manner by closing the through hole of the battery case with the rubber plug portion of the inner sealing member from the outside. After the first sealing step, the outer sealing member is airtightly and annularly fixed to the hole peripheral portion of the battery case while covering the inner sealing member from the outside to form the sealing space. The second sealing step, and at least prior to the second sealing step, the battery case, a first facing space portion that faces the sealing space, and the inner sealing member, The gas supply body is disposed on at least one of the second living space portion that faces the sealing space and the third living space portion that faces the sealing space among the outer sealing members. donor arranging step for arranging, or, prior to the first sealing step, prior to , Of the rubber stopper portion of the inner sealing member, at least, a supply body forming step of the Rinku The inter itself is a portion facing the sealing space and the gas supply member, a cell manufacturing method comprising.

この電池の製造方法では、第１封止工程において、内側封止部材で貫通孔を気密に封止する。このため、その後、第２封止工程までの間に、電池ケース内に収容された電解液が貫通孔を通じて電池ケースの外部（孔周囲部等）に漏れ出るのを防止できる。従って、第２封止工程の際に、貫通孔から漏れ出た電解液が外側封止部材と電池ケースの孔周囲部との間に入り込んで、封止不良が生じるのを防止でき、外側封止部材と孔周囲部とを確実に固着できる。   In this battery manufacturing method, the through hole is hermetically sealed with the inner sealing member in the first sealing step. For this reason, it can prevent that the electrolyte solution accommodated in the battery case leaks to the exterior (hole periphery part etc.) of a battery case through a through-hole after that until a 2nd sealing process. Therefore, during the second sealing step, it is possible to prevent the electrolyte leaking from the through-hole from entering between the outer sealing member and the hole peripheral portion of the battery case, resulting in a sealing failure. The stop member and the hole periphery can be securely fixed.

また、この電池の製造方法では、少なくとも第２封止工程よりも前に行う供給体配置工程において、封止空間に臨む部位である第１臨空間部、第２臨空間部及び第３臨空間部の少なくともいずれかの上に、気体供給体を配置する。または、供給体形成工程において、内側封止部材のゴム栓部のうち、少なくとも、封止空間に臨む部位である臨空間部自身を気体供給体とする。そして、その後の第２封止工程において、外側封止部材を電池ケースに固着して封止空間を形成する。   Further, in this battery manufacturing method, at least in the supply body arranging step that is performed before the second sealing step, the first living space portion, the second living space portion, and the third living space that are portions facing the sealing space. A gas supply body is disposed on at least one of the sections. Or in a supply body formation process, let the near space part itself which is a site | part which faces a sealing space among gas plug parts of an inner side sealing member be a gas supply body. In the subsequent second sealing step, the outer sealing member is fixed to the battery case to form a sealed space.

このようにすることで、封止空間内に容易に気体供給体を配置できる、または、封止空間に臨むゴム栓部の臨空間部自身を気体供給体とすることができる。そして、これらの気体供給体から発生する検知可能気体を封止空間に供給できる。従って、この第２封止工程後の電池では、内側封止部材で貫通孔が気密に封止されているにも拘わらず、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。即ち、気体供給体から封止空間に供給された検知可能気体が、封止空間から電池外部に漏れ出るか否かを検査することにより、外側封止部材と電池ケース（その孔周囲部）との間の気密性を容易かつ確実に検査できる。   By doing in this way, a gas supply body can be easily arrange | positioned in sealing space, or the near space part itself of the rubber plug part which faces a sealing space can be made into a gas supply body. And the detectable gas which generate | occur | produces from these gas supply bodies can be supplied to sealing space. Therefore, in the battery after the second sealing step, the through hole is hermetically sealed with the inner sealing member, but the gap between the outer sealing member and the battery case (the hole peripheral portion) is Airtightness can be inspected easily and reliably. That is, by inspecting whether or not the detectable gas supplied from the gas supply body to the sealed space leaks out of the battery from the sealed space, the outer sealing member and the battery case (the hole surrounding portion) It is possible to easily and reliably inspect the airtightness between the two.

更に、上記の電池の製造方法であって、前記第２封止工程の後、前記検知可能気体が前記封止空間から電池外部に漏れ出るか否かを検査することにより、前記外側封止部材と前記電池ケースの前記孔周囲部との間の気密性を検査する気密検査工程を更に備える電池の製造方法とすると良い。   Further, in the battery manufacturing method described above, after the second sealing step, by inspecting whether the detectable gas leaks from the sealing space to the outside of the battery, the outer sealing member The battery manufacturing method may further include an airtight inspection process for inspecting the airtightness between the battery case and the hole peripheral portion of the battery case.

この電池の製造方法では、気密検査工程において、外側封止部材と電池ケースの孔周囲部との間の気密性を検査する。そして、これらの間に封止不良が生じている電池を確実に排除できる。よって、外側封止部材と電池ケースとの間の気密性を容易かつ確実に検査した電池を製造できる。   In this battery manufacturing method, the airtightness between the outer sealing member and the hole peripheral part of the battery case is inspected in the airtightness inspection step. And the battery in which the sealing defect has arisen among these can be excluded reliably. Therefore, a battery in which the airtightness between the outer sealing member and the battery case is easily and reliably inspected can be manufactured.

更に、上記のいずれかに記載の電池の製造方法であって、前記第１封止工程は、減圧下で行い、前記第２封止工程は、大気圧下で行う電池の製造方法とすると良い。   Furthermore, in any one of the battery manufacturing methods described above, the first sealing step may be performed under reduced pressure, and the second sealing step may be a battery manufacturing method performed under atmospheric pressure. .

第１封止工程を減圧下で行うことで、この第１封止後の電池ケース内を減圧状態（負圧）にすることができる。このため、第２封止工程後に行うコンディショニング工程（初期充電）の際やその後の使用において、電池ケース内に気体が発生しても、電池ケースの内圧が早期に高くなるのを防止できる。一方、溶接等を行う第２封止工程は、大気圧下で行うので、減圧下で行う場合に比して、第２封止工程を容易に行うことができる。   By performing the first sealing step under reduced pressure, the inside of the battery case after the first sealing can be brought into a reduced pressure state (negative pressure). For this reason, it is possible to prevent the internal pressure of the battery case from increasing rapidly even if gas is generated in the battery case during the conditioning process (initial charge) performed after the second sealing process or during subsequent use. On the other hand, since the 2nd sealing process which performs welding etc. is performed under atmospheric pressure, compared with the case where it carries out under reduced pressure, the 2nd sealing process can be performed easily.

実施形態１に係るリチウムイオン二次電池を示す縦断面図である。1 is a longitudinal sectional view showing a lithium ion secondary battery according to Embodiment 1. FIG. 実施形態１に係り、電極体を示す斜視図である。1 is a perspective view showing an electrode body according to Embodiment 1. FIG. 実施形態１に係り、正極板及び負極板をセパレータを介して互いに重ねた状態を示す部分平面図である。FIG. 3 is a partial plan view illustrating a state in which the positive electrode plate and the negative electrode plate are overlapped with each other via a separator according to the first embodiment. 実施形態１に係り、ケース蓋部材、正極端子及び負極端子等を示す分解斜視図である。FIG. 3 is an exploded perspective view illustrating a case lid member, a positive electrode terminal, a negative electrode terminal, and the like according to the first embodiment. 実施形態１に係り、注液孔及び封止部材の近傍を示す部分拡大縦断面図である。FIG. 4 is a partially enlarged longitudinal sectional view showing the vicinity of a liquid injection hole and a sealing member according to the first embodiment. 実施形態１に係り、図５の上方から見た、封止部材の近傍を示す部分拡大平面図である。FIG. 6 is a partially enlarged plan view showing the vicinity of the sealing member according to the first embodiment when viewed from above in FIG. 5. 実施形態１に係り、封止部材を示す縦断面図である。It is a longitudinal cross-sectional view which concerns on Embodiment 1 and shows a sealing member. 実施形態１に係るリチウムイオン二次電池の製造方法に関し、第１封止工程において、封止部材のうち内側封止部材の挿入部を注液孔に圧入して、内側封止部材で注液孔を気密に封止する様子を示す説明図である。Regarding the method for manufacturing a lithium ion secondary battery according to Embodiment 1, in the first sealing step, the insertion portion of the inner sealing member of the sealing member is press-fitted into the liquid injection hole, and the liquid is injected by the inner sealing member. It is explanatory drawing which shows a mode that a hole is sealed airtightly. 実施形態２に係り、注液孔及び封止部材の近傍を示す部分拡大縦断面図である。FIG. 10 is a partially enlarged longitudinal sectional view showing the vicinity of a liquid injection hole and a sealing member according to the second embodiment. 実施形態２に係り、封止部材を示す縦断面図である。It is a longitudinal cross-sectional view which concerns on Embodiment 2 and shows a sealing member. 実施形態３に係り、注液孔及び封止部材の近傍を示す部分拡大縦断面図である。FIG. 10 is a partially enlarged longitudinal sectional view showing the vicinity of a liquid injection hole and a sealing member according to the third embodiment. 実施形態４に係るハイブリッド自動車を示す説明図である。FIG. 10 is an explanatory diagram showing a hybrid vehicle according to a fourth embodiment. 実施形態５に係るハンマードリルを示す説明図である。It is explanatory drawing which shows the hammer drill which concerns on Embodiment 5. FIG.

（実施形態１）
以下、本発明の実施の形態を、図面を参照しつつ説明する。図１に、本実施形態１に係るリチウムイオン二次電池（電池）１００（以下、単に電池１００とも言う）を示す。また、図２及び図３に、この電池１００を構成する捲回型の電極体１２０及びこれを展開した状態を示す。また、図４に、ケース蓋部材１１３、正極端子１５０及び負極端子１６０等の詳細を示す。また、図５及び図６に、注液孔（貫通孔）１７０及び封止部材１８０の近傍の形態を示す。なお、図１，図４及び図５における上方を電池１００の上側、下方を電池１００の下側として説明する。 (Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a lithium ion secondary battery (battery) 100 (hereinafter also simply referred to as battery 100) according to the first embodiment. 2 and 3 show a wound electrode body 120 constituting the battery 100 and a state in which the electrode body 120 is developed. FIG. 4 shows details of the case lid member 113, the positive terminal 150, the negative terminal 160, and the like. 5 and FIG. 6 show forms near the liquid injection hole (through hole) 170 and the sealing member 180. FIG. 1, 4, and 5, the upper side is the upper side of battery 100, and the lower side is the lower side of battery 100.

この電池１００は、ハイブリッド自動車や電気自動車等の車両や、ハンマードリル等の電池使用機器に搭載される角型電池である。この電池１００は、直方体形状の電池ケース１１０、この電池ケース１１０内に収容された捲回型の電極体１２０、電池ケース１１０に支持された正極端子１５０及び負極端子１６０等から構成されている（図１参照）。また、電池ケース１１０内には、非水系の電解液１１７が保持されている。   The battery 100 is a square battery that is mounted on a vehicle such as a hybrid vehicle or an electric vehicle, or a battery-powered device such as a hammer drill. The battery 100 includes a rectangular parallelepiped battery case 110, a wound electrode body 120 accommodated in the battery case 110, a positive electrode terminal 150 and a negative electrode terminal 160 supported by the battery case 110 ( (See FIG. 1). In addition, a non-aqueous electrolyte solution 117 is held in the battery case 110.

このうち電池ケース１１０は、金属（本実施形態１ではアルミニウム）により形成されている。この電池ケース１１０は、上側のみが開口した箱状のケース本体部材１１１と、このケース本体部材１１１の開口１１１ｈを閉塞する形態で溶接されたケース蓋部材１１３とから構成されている（図１及び図４参照）。ケース蓋部材１１３は、電池ケース１１０の内部を向く内表面１１３ｃと、電池ケース１１０の外部を向く外表面１１３ｄとを有する矩形板状をなす。   Of these, the battery case 110 is made of metal (aluminum in the first embodiment). The battery case 110 includes a box-shaped case main body member 111 that is open only on the upper side, and a case lid member 113 that is welded so as to close the opening 111h of the case main body member 111 (see FIG. 1 and FIG. 1). (See FIG. 4). The case lid member 113 has a rectangular plate shape having an inner surface 113 c facing the inside of the battery case 110 and an outer surface 113 d facing the outside of the battery case 110.

ケース蓋部材１１３には、その長手方向の中央付近に、電池ケース１１０の内圧が所定圧力に達した際に破断する非復帰型の安全弁１１５が設けられている。また、この安全弁１１５の近傍には、ケース蓋部材１１３を貫通し、電池ケース１１０の内外を連通する後述する注液孔（貫通孔）１７０が設けられている。この注液孔１７０は、電池ケース１１０内が大気圧よりも減圧された状態（負圧状態）で、後述する封止部材１８０で気密に封止されている。また、ケース蓋部材１１３には、それぞれ電池ケース１１０の内部から外部に延出する形態の通電端子部材１５１からなる正極端子１５０及び負極端子１６０と、ボルト１５３，１５３とが、樹脂からなる絶縁部材１５５，１５５を介して固設されている（図１及び図４参照）。   The case lid member 113 is provided with a non-returnable safety valve 115 that breaks when the internal pressure of the battery case 110 reaches a predetermined pressure near the center in the longitudinal direction. Further, near the safety valve 115, a liquid injection hole (through hole) 170, which will be described later, is provided through the case lid member 113 and communicating between the inside and outside of the battery case 110. The liquid injection hole 170 is hermetically sealed with a sealing member 180 described later in a state where the inside of the battery case 110 is depressurized from the atmospheric pressure (negative pressure state). Further, the case lid member 113 includes a positive electrode terminal 150 and a negative electrode terminal 160 that are each configured to extend from the inside of the battery case 110 to the outside, and bolts 153 and 153 that are insulating members made of resin. 155 and 155 (see FIGS. 1 and 4).

次に、電極体１２０について説明する。この電極体１２０は、絶縁フィルムを上側のみが開口した袋状に形成した絶縁フィルム包囲体１１９内に収容され、横倒しにした状態で電池ケース１１０内に収容されている（図１参照）。この電極体１２０は、帯状の正極板１２１と帯状の負極板１３１とを、帯状のセパレータ１４１を介して互いに重ねて（図３参照）、軸線ＡＸ周りに捲回し、扁平状に圧縮したものである（図２参照）。   Next, the electrode body 120 will be described. The electrode body 120 is housed in an insulating film enclosure 119 formed in a bag shape having an insulating film opened only on the upper side, and is housed in the battery case 110 in a laid state (see FIG. 1). This electrode body 120 is obtained by rolling a belt-like positive electrode plate 121 and a belt-like negative electrode plate 131 to each other via a belt-like separator 141 (see FIG. 3), winding around an axis line AX, and compressing to a flat shape. Yes (see FIG. 2).

正極板１２１は、芯材として、帯状のアルミニウム箔からなる正極集電箔１２２を有する。この正極集電箔１２２の両主面のうち、幅方向の一部でかつ長手方向に延びる領域上には、それぞれ正極活物質層１２３，１２３が長手方向（図３中、左右方向）に帯状に設けられている。これらの正極活物質層１２３，１２３は、正極活物質、導電剤及び結着剤から形成されている。   The positive electrode plate 121 has a positive electrode current collector foil 122 made of a strip-shaped aluminum foil as a core material. On both main surfaces of the positive electrode current collector foil 122, the positive electrode active material layers 123 and 123 are strip-shaped in the longitudinal direction (left and right direction in FIG. 3) on a part extending in the longitudinal direction and extending in the longitudinal direction. Is provided. These positive electrode active material layers 123 and 123 are formed of a positive electrode active material, a conductive agent, and a binder.

正極板１２１のうち、自身の厚み方向に正極集電箔１２２及び正極活物質層１２３，１２３が存在する帯状の部位が、正極部１２１ｗである。この正極部１２１ｗは、電極体１２０を構成した状態において、その全域がセパレータ１４１を介して負極板１３１の後述する負極部１３１ｗと対向している（図３参照）。また、正極板１２１に正極部１２１ｗを設けたことに伴い、正極集電箔１２２のうち、幅方向の片方の端部（図３中、上方）は、長手方向に帯状に延び、自身の厚み方向に正極活物質層１２３が存在しない正極集電部１２１ｍとなっている。この正極集電部１２１ｍの幅方向の一部は、セパレータ１４１から軸線ＡＸ方向の一方側ＳＡに渦巻き状をなして突出しており（図２参照）、前述の正極端子１５０と接続している（図１参照）。   In the positive electrode plate 121, a belt-like portion where the positive electrode current collector foil 122 and the positive electrode active material layers 123 and 123 exist in the thickness direction of the positive electrode plate 121 is the positive electrode portion 121 w. In the state where the electrode body 120 is configured, the entire area of the positive electrode portion 121w is opposed to a later-described negative electrode portion 131w of the negative electrode plate 131 via the separator 141 (see FIG. 3). In addition, with the provision of the positive electrode part 121w on the positive electrode plate 121, one end part in the width direction (upward in FIG. 3) of the positive electrode current collector foil 122 extends in a band shape in the longitudinal direction, and has its own thickness. The positive electrode current collector portion 121m has no positive electrode active material layer 123 in the direction. A part of the positive electrode current collector 121m in the width direction protrudes from the separator 141 in a spiral shape to one side SA in the axis AX direction (see FIG. 2), and is connected to the positive electrode terminal 150 described above ( (See FIG. 1).

また、負極板１３１は、芯材として、帯状の銅箔からなる負極集電箔１３２を有する。この負極集電箔１３２の両主面のうち、幅方向の一部でかつ長手方向に延びる領域上には、それぞれ負極活物質層１３３，１３３が長手方向（図３中、左右方向）に帯状に設けられている。これらの負極活物質層１３３，１３３は、負極活物質、結着剤及び増粘剤から形成されている。   Moreover, the negative electrode plate 131 has the negative electrode current collection foil 132 which consists of strip | belt-shaped copper foil as a core material. On both main surfaces of the negative electrode current collector foil 132, negative electrode active material layers 133 and 133 are band-like in the longitudinal direction (left and right direction in FIG. 3) on a portion extending in the longitudinal direction and extending in the longitudinal direction. Is provided. These negative electrode active material layers 133 and 133 are formed of a negative electrode active material, a binder, and a thickener.

負極板１３１のうち、自身の厚み方向に負極集電箔１３２及び負極活物質層１３３，１３３が存在する帯状の部位が、負極部１３１ｗである。この負極部１３１ｗは、電極体１２０を構成した状態において、その全域がセパレータ１４１と対向している。また、負極板１３１に負極部１３１ｗを設けたことに伴い、負極集電箔１３２のうち、幅方向の片方の端部（図３中、下方）は、長手方向に帯状に延び、自身の厚み方向に負極活物質層１３３が存在しない負極集電部１３１ｍとなっている。この負極集電部１３１ｍの幅方向の一部は、セパレータ１４１から軸線ＡＸ方向の他方側ＳＢに渦巻き状をなして突出しており（図２参照）、前述の負極端子１６０と接続している（図１参照）。
また、セパレータ１４１は、樹脂からなる多孔質膜であり、帯状をなす。 In the negative electrode plate 131, a strip-shaped portion where the negative electrode current collector foil 132 and the negative electrode active material layers 133 and 133 are present in the thickness direction of the negative electrode plate 131 is the negative electrode portion 131w. The entire area of the negative electrode portion 131 w faces the separator 141 in a state where the electrode body 120 is configured. In addition, as a result of providing the negative electrode portion 131w on the negative electrode plate 131, one end portion (downward in FIG. 3) in the width direction of the negative electrode current collector foil 132 extends in a band shape in the longitudinal direction and has its own thickness. The negative electrode current collector portion 131m has no negative electrode active material layer 133 in the direction. A part of the negative electrode current collector 131m in the width direction protrudes from the separator 141 to the other side SB in the axis AX direction in a spiral shape (see FIG. 2), and is connected to the negative electrode terminal 160 described above ( (See FIG. 1).
The separator 141 is a porous film made of resin and has a strip shape.

次に、注液孔１７０、凹部１７５及び封止部材１８０について説明する（図５〜図７参照）。
凹部１７５は、ケース蓋部材１１３の内表面１１３ｃ側（図５、下方）に凹む平面視円形状の凹部である。この凹部１７５は、円筒状をなす凹部側面１７５ｆ１と、内表面１１３ｃに平行に延びる平面をなす凹部底面１７５ｆ２とにより構成されている。 Next, the liquid injection hole 170, the recessed part 175, and the sealing member 180 are demonstrated (refer FIGS. 5-7).
The concave portion 175 is a concave portion having a circular shape in plan view that is recessed toward the inner surface 113c of the case lid member 113 (downward in FIG. 5). The recess 175 includes a cylindrical recess side surface 175f1 and a recess bottom surface 175f2 forming a plane extending in parallel with the inner surface 113c.

注液孔１７０は、電解液１１７を電池ケース１１０内に注入するために形成され、ケース蓋部材１１３の内表面１１３ｃと外表面１１３ｄ（その凹部底面１７５ｆ２）との間を貫通する形態で、凹部底面１７５ｆ２の中央に設けられた孔である。この注液孔１７０は、軸線ＢＸ方向に延びる円孔であり、円筒状をなす孔側面１７０ｆで構成されており、電池ケース１１０の内外を連通している。   The liquid injection hole 170 is formed to inject the electrolytic solution 117 into the battery case 110, and penetrates between the inner surface 113c and the outer surface 113d (its concave bottom surface 175f2) of the case lid member 113. This is a hole provided in the center of the bottom surface 175f2. The liquid injection hole 170 is a circular hole extending in the direction of the axis BX, and is configured by a cylindrical hole side surface 170 f that communicates the inside and outside of the battery case 110.

一方、封止部材１８０は、外側封止部材１８１と、これに接合された内側封止部材１８３とから構成されている。
このうち外側封止部材１８１は、電池ケース１１０の材質と同じ材質、具体的には、アルミニウムからなる。この外側封止部材１８１は、封止部材１８０の軸線ＣＸ方向の内側ＣＣ（ケース蓋部材１１３側、図５及び図７中、下方）に位置する主面である内表面１８１ｃと、これに平行で軸線ＣＸ方向の外側ＣＤ（ケース蓋部材１１３とは反対側、図５及び図７中、上方）に位置する主面である外表面１８１ｄとを有し、凹部１７５の内径と同じ外径を有する円板状をなす。 On the other hand, the sealing member 180 includes an outer sealing member 181 and an inner sealing member 183 joined thereto.
Of these, the outer sealing member 181 is made of the same material as the battery case 110, specifically, aluminum. The outer sealing member 181 is parallel to the inner surface 181c which is a main surface located on the inner side CC (on the case lid member 113 side, the lower side in FIGS. 5 and 7) of the sealing member 180 in the axis CX direction. And an outer surface 181d which is a main surface located on the outer side CD in the direction of the axis CX (on the opposite side to the case lid member 113, upper in FIGS. 5 and 7), and has the same outer diameter as the inner diameter of the recess 175. It has a disk shape.

この外側封止部材１８１は、内側封止部材１８３を電池ケース１１０の外部から覆いつつ、注液孔１７０と同軸になる形態で、凹部１７５内に嵌合して、電池ケース１１０（そのケース蓋部材１１３）に固着されている。具体的には、外側封止部材１８１の外周縁に沿う円環状の周縁部１８１ｍが、ケース蓋部材１１３のうち注液孔１７０を囲む円環状の孔周囲部１１３ｍに、全周にわたり溶接されて、平面視円環状の溶接部１８１ｙを形成している。これにより、外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとが気密に接合されている。   This outer sealing member 181 covers the inner sealing member 183 from the outside of the battery case 110 and fits into the recess 175 in a form that is coaxial with the liquid injection hole 170, so that the battery case 110 (its case lid) is fitted. It is fixed to the member 113). Specifically, an annular peripheral portion 181m along the outer peripheral edge of the outer sealing member 181 is welded over the entire periphery to an annular hole peripheral portion 113m surrounding the liquid injection hole 170 in the case lid member 113. An annular welded portion 181y is formed in plan view. Thereby, the peripheral edge part 181m of the outer side sealing member 181 and the hole surrounding part 113m of the battery case 110 are airtightly joined.

また、内側封止部材１８３は、その全体がゴム状弾性体、本実施形態１では エチレンプロピレンジエンゴム（ＥＰＤＭ）からなり、内側封止部材１８３の全体が前述のゴム栓部に相当する。この内側封止部材１８３は、挿入部１８４と環状圧接部１８５とから構成され、これらが一体に繋がった形態を有する。
このうち挿入部１８４は、径小な頂面１８４ｃと径大な底面１８４ｄとこれらの間を結ぶ側面１８４ｆとを有する円錐台状をなす。このうち頂面１８４ｃは、注液孔１７０の内径よりも径小となっている。一方、底面１８４ｄは、頂面１８４ｃよりも径大で、かつ、注液孔１７０の内径よりも径大となっている。 The entire inner sealing member 183 is made of a rubber-like elastic body, which is ethylene propylene diene rubber (EPDM) in the first embodiment, and the entire inner sealing member 183 corresponds to the aforementioned rubber plug portion. The inner sealing member 183 includes an insertion portion 184 and an annular pressure contact portion 185, and has a form in which these are integrally connected.
Of these, the insertion portion 184 has a truncated cone shape having a small-diameter top surface 184c, a large-diameter bottom surface 184d, and a side surface 184f connecting them. Among these, the top surface 184 c is smaller in diameter than the inner diameter of the liquid injection hole 170. On the other hand, the bottom surface 184 d is larger in diameter than the top surface 184 c and larger in diameter than the inner diameter of the liquid injection hole 170.

この挿入部１８４は、その底面１８４ｄが外側封止部材１８１の内表面１８１ｃの中央に接合されて、環状圧接部１８５と共に外側封止部材１８１と一体化されている。この挿入部１８４は、外側封止部材１８１の内表面１８１ｃから軸線ＢＸ，ＣＸ方向の内側ＢＣ，ＣＣ（図５及び図７中、下方）に延びて、注液孔１７０内に挿入されている。具体的には、挿入部１８４は、注液孔１７０に圧入されており、自身の弾性によって、その側面１８４ｆが、注液孔１７０の孔側面１７０ｆと凹部１７５の凹部底面１７５ｆ２とのなす角部１７０ｆａに気密に圧接して、注液孔１７０を気密に封止（密栓）している。   The insertion portion 184 has a bottom surface 184 d joined to the center of the inner surface 181 c of the outer sealing member 181, and is integrated with the outer sealing member 181 together with the annular pressure contact portion 185. The insertion portion 184 extends from the inner surface 181c of the outer sealing member 181 to the inner sides BC and CC (downward in FIGS. 5 and 7) in the directions of the axes BX and CX, and is inserted into the liquid injection hole 170. . Specifically, the insertion portion 184 is press-fitted into the liquid injection hole 170, and due to its own elasticity, the side surface 184f is a corner portion formed by the hole side surface 170f of the liquid injection hole 170 and the concave bottom surface 175f2 of the concave portion 175. The liquid injection hole 170 is hermetically sealed (tightly plugged) in pressure contact with 170fa.

また、環状圧接部１８５は、その断面が概略矩形状で、外径が凹部１７５の内径（凹部底面１７５ｆ２の外径）よりも小さくされた平面視円環状をなす。この環状圧接部１８５は、挿入部１８４の周囲を囲む形態で挿入部１８４に繋がって挿入部１８４と一体化されている。この環状圧接部１８５は、頂面１８５ｃと底面１８５ｄと外側面１８５ｆとを有する。このうち頂面１８５ｃは、軸線ＢＸ，ＣＸ方向の内側ＢＣ，ＣＣ（図５及び図７中、下方）を向く面である。また、底面１８５ｄは、軸線ＢＸ，ＣＸ方向の外側ＢＤ，ＣＤ（図５及び図７中、上方）を向く面である。また、外側面１８５ｆは、軸線ＢＸ，ＣＸの径方向外側を向く面である。   Further, the annular pressure contact portion 185 has a substantially rectangular shape in cross section, and has an annular shape in plan view in which the outer diameter is smaller than the inner diameter of the recess 175 (the outer diameter of the recess bottom surface 175f2). The annular pressure contact portion 185 is connected to the insertion portion 184 and integrated with the insertion portion 184 so as to surround the insertion portion 184. The annular pressure contact portion 185 has a top surface 185c, a bottom surface 185d, and an outer surface 185f. Of these, the top surface 185c is a surface facing the inner side BC, CC (downward in FIGS. 5 and 7) in the directions of the axes BX, CX. The bottom surface 185d is a surface facing the outside BD, CD (upward in FIGS. 5 and 7) in the directions of the axes BX and CX. Further, the outer surface 185f is a surface facing the radially outer side of the axes BX and CX.

この環状圧接部１８５は、その底面１８５ｄが外側封止部材１８１の内表面１８１ｃに接合されて、挿入部１８４と共に外側封止部材１８１と一体化されている。また、この環状圧接部１８５は、外側封止部材１８１からの押圧により、全周にわたり厚み方向（図５中、上下方向）に圧縮されている。これにより、環状圧接部１８５の頂面１８５ｃは、凹部１７５の凹部底面１７５ｆ２に密着して、環状圧接部１８５よりも径方向内側に位置する注液孔１７０を気密に封止している。前述のように、注液孔１７０は、挿入部１８４によっても気密に封止されているので、挿入部１８４と環状圧接部１８５とでそれぞれシールされている。   The bottom surface 185 d of the annular pressure contact portion 185 is joined to the inner surface 181 c of the outer sealing member 181, and is integrated with the outer sealing member 181 together with the insertion portion 184. Further, the annular pressure contact portion 185 is compressed in the thickness direction (vertical direction in FIG. 5) over the entire circumference by pressing from the outer sealing member 181. As a result, the top surface 185c of the annular pressure contact portion 185 is in close contact with the recess bottom surface 175f2 of the recess 175, and the liquid injection hole 170 positioned radially inward of the annular pressure contact portion 185 is hermetically sealed. As described above, since the liquid injection hole 170 is hermetically sealed also by the insertion portion 184, the insertion portion 184 and the annular pressure contact portion 185 are respectively sealed.

また、環状圧接部１８５の径方向外側、かつ、電池ケース１１０の外部には、気密に封止された封止空間ＫＣが形成されている。この封止空間ＫＣは、電池ケース１１０（具体的にはそのケース蓋部材１１３の一部である凹部側面１７５ｆ１及び凹部底面１７５ｆ２）と、外側封止部材１８１の内表面１８１ｃと、内側封止部材１８３（その環状圧接部１８５）の外側面１８５ｆとの間に形成された円環状の空間である。   Further, a hermetically sealed space KC is formed outside the annular pressure contact portion 185 in the radial direction and outside the battery case 110. The sealing space KC includes a battery case 110 (specifically, a concave side surface 175f1 and a concave bottom surface 175f2 that are part of the case lid member 113), an inner surface 181c of the outer sealing member 181 and an inner sealing member. It is an annular space formed between the outer surface 185f of 183 (the annular pressure contact portion 185).

なお、凹部側面１７５ｆ１及び凹部底面１７５ｆ２のうち、封止空間ＫＣを臨む部位が、前述の第１臨空間部１７５ｊに相当する。また、環状圧接部１８５の外側面１８５ｆ全体が、封止空間ＫＣを臨む部位であり、前述の第２臨空間部１８５ｊに相当する。また、外側封止部材１８１の内表面１８１ｃのうち、封止空間ＫＣを臨む部位が、前述の第３臨空間部１８１ｊに相当する。   Of the concave side surface 175f1 and the concave bottom surface 175f2, a portion facing the sealing space KC corresponds to the first preliminary space portion 175j. Further, the entire outer surface 185f of the annular pressure contact portion 185 is a portion facing the sealing space KC, and corresponds to the above-described second near space portion 185j. Moreover, the site | part which faces the sealing space KC among the inner surfaces 181c of the outer side sealing member 181 is equivalent to the above-mentioned 3rd near space part 181j.

この封止空間ＫＣ内に存在する（封止空間ＫＣ内に封入された）気体である空間内気体ＧＳ１は、この空間内気体ＧＳ１が封止空間ＫＣから電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含んでいる。本実施形態１では、検知可能気体はジエチレングリコールモノブチルエーテルガスであり、空間内気体ＧＳ１は、ジエチレングリコールモノブチルエーテルガスと大気とのジエチレングリコールモノブチルエーテル−大気混合気体となっている。なお、後述するように、検知可能気体やこれを含む空間内気体ＧＳ１は、適宜変更できる。   The space gas GS1, which is a gas existing in the sealed space KC (enclosed in the sealed space KC), is in the atmosphere when the space gas GS1 leaks out of the battery from the sealed space KC. It contains a detectable gas that can be detected separately from the gas component. In the first embodiment, the detectable gas is diethylene glycol monobutyl ether gas, and the space gas GS1 is a diethylene glycol monobutyl ether-atmosphere mixed gas of diethylene glycol monobutyl ether gas and the atmosphere. As will be described later, the detectable gas and the in-space gas GS1 including this can be changed as appropriate.

また、この封止空間ＫＣ内には、検知可能気体であるジエチレングリコールモノブチルエーテルガスを封止空間ＫＣへ供給する気体供給体１９０が配置されている。本実施形態１では、この気体供給体１９０は、ジエチレングリコールモノブチルエーテルを含有する塗膜であり、ケース蓋部材１１３のうち、封止空間ＫＣを臨む第１臨空間部１７５ｊ上に、平面視円環状に形成されている。   Further, in this sealed space KC, a gas supply 190 for supplying diethylene glycol monobutyl ether gas, which is a detectable gas, to the sealed space KC is disposed. In the first embodiment, the gas supply body 190 is a coating film containing diethylene glycol monobutyl ether, and in the case lid member 113, the first supply space portion 175j facing the sealing space KC is circular in plan view. Is formed.

なお、図５中に破線で示すように、ジエチレングリコールモノブチルエーテルを含む塗膜（気体供給体）１９１を、内側封止部材１８３のうち、封止空間ＫＣを臨む第２臨空間部１８５ｊ上に形成してもよい。或いは、図５中に破線で示すように、ジエチレングリコールモノブチルエーテルを含む塗膜（気体供給体）１９２を、外側封止部材１８１のうち、封止空間ＫＣを臨む第３臨空間部１８１ｊ上に形成してもよい。このような塗膜１９１，１９２も、封止空間ＫＣにジエチレングリコールモノブチルエーテルガス（検知可能気体）を供給できる。   In addition, as shown with a broken line in FIG. 5, the coating film (gas supply body) 191 containing diethylene glycol monobutyl ether is formed on the 2nd near space part 185j which faces the sealing space KC among the inner side sealing members 183. May be. Alternatively, as indicated by a broken line in FIG. 5, a coating film (gas supply body) 192 containing diethylene glycol monobutyl ether is formed on the third near-space portion 181 j facing the sealing space KC in the outer sealing member 181. May be. Such coating films 191 and 192 can also supply diethylene glycol monobutyl ether gas (detectable gas) to the sealed space KC.

以上で説明したように、本実施形態１に係る電池１００は、自身の内外を連通する注液孔（貫通孔）１７０を有する電池ケース１１０と、これに収容された電極体１２０とを備える。また、この電池１００は、ゴム状弾性体からなり、注液孔１７０を電池ケース１１０の外部から気密に封止してなるゴム栓部１８３を有する内側封止部材１８３と、これを更に外部から覆いつつ、電池ケース１１０のうち注液孔１７０を囲む環状の孔周囲部１１３ｍに気密かつ環状に固着してなる外側封止部材１８１とを備える。そして、この電池１００は、電池ケース１１０（そのケース蓋部材１１３）と内側封止部材１８３と外側封止部材１８１との間に形成された気密に封止された空間を、封止空間ＫＣとしたとき、この封止空間ＫＣ内に存在する気体である空間内気体ＧＳ１は、封止空間ＫＣから電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含む。また、この電池１００は、封止空間ＫＣへ検知可能気体を供給する塗膜（気体供給体）１９０（１９１，１９２）を有する。   As described above, the battery 100 according to the first embodiment includes the battery case 110 having the liquid injection hole (through hole) 170 that communicates the inside and the outside of the battery 100 and the electrode body 120 accommodated therein. Further, the battery 100 is made of a rubber-like elastic body, and an inner sealing member 183 having a rubber plug portion 183 formed by sealing the liquid injection hole 170 from the outside of the battery case 110, and further this from the outside. An outer sealing member 181 that is airtight and annularly fixed to an annular hole peripheral portion 113m surrounding the liquid injection hole 170 in the battery case 110 is provided. In the battery 100, an airtightly sealed space formed between the battery case 110 (its case lid member 113), the inner sealing member 183, and the outer sealing member 181 is defined as a sealing space KC. When this occurs, the in-space gas GS1, which is a gas existing in the sealed space KC, includes a detectable gas that can be detected separately from the gas components in the atmosphere when leaked from the sealed space KC to the outside of the battery. . In addition, the battery 100 includes a coating film (gas supply body) 190 (191, 192) that supplies a detectable gas to the sealed space KC.

この電池１００では、内側封止部材１８３が注液孔１７０を気密に封止すると共に、外側封止部材１８１がこの内側封止部材１８３を外部から覆って電池ケース１１０の孔周囲部１１３ｍに気密かつ環状に固着している。従って、注液孔１７０は、前述のように、内側封止部材１８３及び外側封止部材１８１により二重にシールされている。しかし、この電池１００では、電池ケース１１０（そのケース蓋部材１１３）と内側封止部材１８３と外側封止部材１８１との間に形成された封止空間ＫＣ内の空間内気体ＧＳ１が、封止空間ＫＣから電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体（本実施形態１ではジエチレングリコールモノブチルエーテルガス）を含む。また、この電池１００は、この検知可能気体（ジエチレングリコールモノブチルエーテルガス）を封止空間ＫＣに供給する塗膜１９０（１９１，１９２）を有する。   In the battery 100, the inner sealing member 183 hermetically seals the liquid injection hole 170, and the outer sealing member 181 covers the inner sealing member 183 from the outside and hermetically seals the hole peripheral portion 113 m of the battery case 110. And it adheres to the ring. Therefore, the liquid injection hole 170 is double-sealed by the inner sealing member 183 and the outer sealing member 181 as described above. However, in this battery 100, the gas GS1 in the space in the sealed space KC formed between the battery case 110 (the case lid member 113), the inner sealing member 183, and the outer sealing member 181 is sealed. Detectable gas (diethylene glycol monobutyl ether gas in the first embodiment) that can be detected separately from gas components in the atmosphere when leaked from the space KC to the outside of the battery is included. The battery 100 also has a coating film 190 (191, 192) that supplies this detectable gas (diethylene glycol monobutyl ether gas) to the sealed space KC.

このため、内側封止部材１８３で注液孔１７０が気密に封止されているにも拘わらず、外側封止部材１８１と電池ケース１１０（その孔周囲部１１３ｍ）との間の気密性を容易かつ確実に検査できる。即ち、塗膜１９０（或いは塗膜１９１，１９２）から封止空間ＫＣに供給された検知可能気体（本実施形態１ではジエチレングリコールモノブチルエーテルガス）が、封止空間ＫＣから電池外部に漏れ出るか否かを検査することにより、外側封止部材１８１と電池ケース１１０（その孔周囲部１１３ｍ）との間の気密性を容易かつ確実に検査できる。   For this reason, although the liquid injection hole 170 is hermetically sealed by the inner sealing member 183, the airtightness between the outer sealing member 181 and the battery case 110 (the hole peripheral portion 113m) is easily achieved. And can be inspected reliably. That is, whether or not the detectable gas (diethylene glycol monobutyl ether gas in the first embodiment) supplied from the coating film 190 (or the coating films 191 and 192) to the sealing space KC leaks out of the battery from the sealing space KC. By inspecting this, the airtightness between the outer sealing member 181 and the battery case 110 (the hole peripheral portion 113m) can be easily and reliably inspected.

また、本実施形態１では、電池ケース１１０（そのケース蓋部材１１３）のうち、封止空間ＫＣを臨む部位を第１臨空間部１７５ｊとし、内側封止部材１８３のうち、封止空間ＫＣを臨む部位を第２臨空間部１８５ｊとし、外側封止部材１８１のうち、封止空間ＫＣを臨む部位を第３臨空間部１８１ｊとしたとき、塗膜（気体供給体）１９０，１９１，１９２は、第１臨空間部１７５ｊ、前記第２臨空間部１８５ｊ及び第３臨空間部１８１ｊの少なくともいずれかの上に配置されている。このため、塗膜１９０（或いは塗膜１９１，１９２）から発生した検知可能気体（本実施形態１ではジエチレングリコールモノブチルエーテルガス）を、確実に封止空間ＫＣ内に供給できる。   Further, in the first embodiment, a part of the battery case 110 (the case lid member 113) facing the sealing space KC is defined as a first critical space part 175j, and the sealing space KC of the inner sealing member 183 is defined as the first space part 175j. When the facing portion is the second facing space portion 185j and the portion of the outer sealing member 181 facing the sealing space KC is the third facing space portion 181j, the coating films (gas supply bodies) 190, 191, 192 are , Disposed on at least one of the first living space 175j, the second living space 185j, and the third living space 181j. For this reason, the detectable gas (diethylene glycol monobutyl ether gas in the first embodiment) generated from the coating film 190 (or coating films 191, 192) can be reliably supplied into the sealed space KC.

次いで、上記電池１００の製造方法について説明する。まず、別途形成した帯状の正極板１２１及び帯状の負極板１３１を、帯状のセパレータ１４１を介して互いに重ね（図３参照）、巻き芯を用いて軸線ＡＸ周りに捲回する。その後、これを扁平状に圧縮して電極体１２０を形成する（図２参照）。
また別途、外側封止部材１８１と内側封止部材１８３とからなる封止部材１８０（図７参照）を形成しておく。具体的には、金属板からなる外側封止部材１８１を射出成形用の金型にセットし、射出成形により挿入部１８４及び環状圧接部１８５からなる内側封止部材１８３を外側封止部材１８１と一体に成形する。 Next, a method for manufacturing the battery 100 will be described. First, a separately formed belt-like positive electrode plate 121 and a belt-like negative electrode plate 131 are overlapped with each other via a belt-like separator 141 (see FIG. 3) and wound around an axis AX using a winding core. Thereafter, this is compressed into a flat shape to form the electrode body 120 (see FIG. 2).
Separately, a sealing member 180 (see FIG. 7) composed of an outer sealing member 181 and an inner sealing member 183 is formed. Specifically, the outer sealing member 181 made of a metal plate is set in a mold for injection molding, and the inner sealing member 183 made up of the insertion portion 184 and the annular pressure contact portion 185 is formed with the outer sealing member 181 by injection molding. Molded in one piece.

また、安全弁１１５及び注液孔１７０等を形成したケース蓋部材１１３と、通電端子部材１５１及びボルト１５３とを用意し、これらを射出成形用の金型にセットする。そして、射出成形により絶縁部材１５５を一体的に成形して、ケース蓋部材１１３に正極端子１５０及び負極端子１６０を固設する（図４参照）。   In addition, a case lid member 113 having a safety valve 115, a liquid injection hole 170, etc., an energizing terminal member 151 and a bolt 153 are prepared, and these are set in an injection mold. Then, the insulating member 155 is integrally formed by injection molding, and the positive electrode terminal 150 and the negative electrode terminal 160 are fixed to the case lid member 113 (see FIG. 4).

次に、正極端子１５０と電極体１２０の正極集電部１２１ｍとを接続（溶接）する。また、負極端子１６０と電極体１２０の負極集電部１３１ｍとを接続（溶接）する。その後、ケース本体部材１１１及び絶縁フィルム包囲体１１９を用意し、ケース本体部材１１１内に絶縁フィルム包囲体１１９を介して電極体１２０を収容すると共に、ケース本体部材１１１の開口１１１ｈをケース蓋部材１１３で塞ぐ。そして、レーザ溶接によりケース本体部材１１１とケース蓋部材１１３とを溶接して、電池ケース１１０を形成する（図１参照）。   Next, the positive electrode terminal 150 and the positive electrode current collector 121m of the electrode body 120 are connected (welded). Further, the negative electrode terminal 160 and the negative electrode current collector 131m of the electrode body 120 are connected (welded). Thereafter, a case main body member 111 and an insulating film enclosure 119 are prepared, the electrode body 120 is accommodated in the case main body member 111 via the insulating film enclosure 119, and an opening 111 h of the case main body member 111 is formed in the case lid member 113. Close with. Then, the battery case 110 is formed by welding the case body member 111 and the case lid member 113 by laser welding (see FIG. 1).

次に、この電池ケース１１０等の気密性を検査する（電池ケース等の気密検査工程）。具体的には、この電池１００をチャンバ内に入れて、チャンバ内をヘリウムガスで充満させると共に、ケース蓋部材１１３の注液孔１７０に吸引用ノズルを気密に装着して、電池ケース１１０の内部を減圧する。例えば、電池ケース１１０の接合部分（ケース本体部材１１１とケース蓋部材１１３との溶接部分）や、電池ケース１１０と正極端子１５０または負極端子１６０との固設部分（ケース蓋部材１１３と絶縁部材１５５との間や絶縁部材１５５と通電端子部材１５１との間）に封止不良がある場合には、電池ケース１１０外のヘリウムガスが電池ケース１１０内に侵入する。従って、電池ケース１１０内に侵入したヘリウムガスを検知することで、ケース本体部材１１１とケース蓋部材１１３との間の気密性を検査できる。   Next, the airtightness of the battery case 110 or the like is inspected (airtight inspection process for the battery case or the like). Specifically, the battery 100 is placed in a chamber, the chamber is filled with helium gas, and a suction nozzle is attached to the liquid injection hole 170 of the case lid member 113 in an airtight manner. The pressure is reduced. For example, a joined portion of the battery case 110 (welded portion between the case main body member 111 and the case lid member 113) or a fixed portion between the battery case 110 and the positive electrode terminal 150 or the negative electrode terminal 160 (the case lid member 113 and the insulating member 155). When there is a sealing failure between the insulating member 155 and the energizing terminal member 151), helium gas outside the battery case 110 enters the battery case 110. Therefore, by detecting the helium gas that has entered the battery case 110, the airtightness between the case main body member 111 and the case lid member 113 can be inspected.

次に、この電池１００を真空チャンバ内に入れて真空チャンバ内を減圧する。そして、注液用ノズルを注液孔１７０内に挿入して、注液用ノズルから電池ケース１１０内に電解液１１７を注液する。その後、不織布により注液孔１７０の周囲（孔周囲部１１３ｍを含む）を清掃する。電解液１１７の注入の際、電解液１１７が注液孔１７０の周囲に付着するおそれがあるが、この清掃により注液孔１７０の周囲を清浄状態とすることができる。   Next, the battery 100 is placed in a vacuum chamber and the vacuum chamber is depressurized. Then, a liquid injection nozzle is inserted into the liquid injection hole 170, and the electrolytic solution 117 is injected into the battery case 110 from the liquid injection nozzle. Thereafter, the periphery of the liquid injection hole 170 (including the hole peripheral portion 113m) is cleaned with a nonwoven fabric. When the electrolytic solution 117 is injected, the electrolytic solution 117 may adhere to the periphery of the liquid injection hole 170. This cleaning can clean the periphery of the liquid injection hole 170.

次に、供給体形成工程において、電池ケース１１０（そのケース蓋部材１１３）のうち、封止空間ＫＣを臨む第１臨空間部１７５ｊ上に、ジエチレングリコールモノブチルエーテルを含有する油性塗料を、平面視円環状に塗布し、ジエチレングリコールモノブチルエーテルを含む塗膜（気体供給体１９０）を形成する。なお、この塗膜１９０は、次述する第１封止工程後も塗膜１９０内にジエチレングリコールモノブチルエーテルが残るように（第１封止工程を終えるまでに塗膜１９０内のジエチレングリコールモノブチルエーテルが全て蒸発することがないように）、十分な膜厚とする。   Next, in the supply body forming step, an oil-based paint containing diethylene glycol monobutyl ether is circularly seen in plan view on the first space portion 175j facing the sealing space KC in the battery case 110 (case cover member 113). Applying in a ring shape, a coating film (gas supply body 190) containing diethylene glycol monobutyl ether is formed. In addition, this coating film 190 is such that diethylene glycol monobutyl ether remains in the coating film 190 even after the first sealing step described below (all the diethylene glycol monobutyl ether in the coating film 190 is finished by the end of the first sealing step). The film thickness should be sufficient to prevent evaporation.

なお、前述の塗膜（気体供給体）１９１を形成する場合には、内側封止部材１８３のうち、封止空間ＫＣを臨む第２臨空間部１８５ｊ上に、ジエチレングリコールモノブチルエーテルを含有する塗料を塗布する。また、前述の塗膜（気体供給体）１９２を形成する場合には、外側封止部材１８１のうち、封止空間ＫＣを臨む第３臨空間部１８１ｊ上に、ジエチレングリコールモノブチルエーテルを含有する塗料を塗布するとよい。   In the case of forming the above-described coating film (gas supply body) 191, a paint containing diethylene glycol monobutyl ether is formed on the second inner space portion 185j of the inner sealing member 183 facing the sealing space KC. Apply. Moreover, when forming the above-mentioned coating film (gas supply body) 192, the coating material containing a diethylene glycol monobutyl ether is provided on the 3rd near space part 181j which faces the sealing space KC among the outer side sealing members 181. Apply.

次に、供給体形成工程の後、速やかに（例えば５秒以内に）、この減圧下において第１封止工程を行う。即ち、電池ケース１１０（そのケース蓋部材１１３）の注液孔１７０を、電池ケース１１０の外部から内側封止部材１８３で塞いで、注液孔１７０を気密に封止する（図８参照）。具体的には、封止部材１８０のうち内側封止部材１８３の挿入部１８４を、注液孔１７０に電池ケース１１０の外部から（注液孔１７０の軸線ＢＸ方向の外側ＢＤから）圧入する。そして、挿入部１８４の側面１８４ｆを注液孔１７０の角部１７０ｆａに圧接させて、挿入部１８４で注液孔１７０を気密に封止（密栓）する。その際、挿入部１８４は位置決めガイドとしての役割も果たすので、注液孔１７０に対する封止部材１８０の位置決めを精度良く行うことができる。   Next, after the supply body forming step, the first sealing step is performed immediately (for example, within 5 seconds) under this reduced pressure. That is, the liquid injection hole 170 of the battery case 110 (the case lid member 113) is closed from the outside of the battery case 110 with the inner sealing member 183, and the liquid injection hole 170 is hermetically sealed (see FIG. 8). Specifically, the insertion portion 184 of the inner sealing member 183 of the sealing member 180 is press-fitted into the liquid injection hole 170 from the outside of the battery case 110 (from the outer side BD of the liquid injection hole 170 in the axis BX direction). Then, the side surface 184f of the insertion portion 184 is brought into pressure contact with the corner portion 170fa of the liquid injection hole 170, and the liquid injection hole 170 is hermetically sealed (sealed) with the insertion portion 184. At that time, since the insertion portion 184 also serves as a positioning guide, the sealing member 180 can be accurately positioned with respect to the liquid injection hole 170.

第１封止後は、真空チャンバ内を大気圧に戻して、真空チャンバからこの電池１００を取り出す。電池ケース１１０は、第１封止工程で内側封止部材１８３により気密に封止されているので、電池１００を大気圧下に戻しても、電池ケース１１０内はその減圧状態を保っている。
ところで、注液孔１７０が封止されていない場合には、電池ケース１１０内に収容された電解液１１７が、電池外部に漏れ出たり、電池ケース１１０の孔周囲部１１３ｍに付着するおそれがある。しかし、本実施形態１では、前述の第１封止工程において内側封止部材１８３（その挿入部１８４）で注液孔１７０を気密に封止している。従って、電解液１１７が電池外部に漏れ出るのを確実に防止できる。また、次述する第２封止工程も、電池ケース１１０内を減圧状態に保ったまま、大気圧下で行うことができる。 After the first sealing, the inside of the vacuum chamber is returned to atmospheric pressure, and the battery 100 is taken out from the vacuum chamber. Since the battery case 110 is hermetically sealed by the inner sealing member 183 in the first sealing step, the inside of the battery case 110 is kept in a reduced pressure state even when the battery 100 is returned to atmospheric pressure.
By the way, when the liquid injection hole 170 is not sealed, the electrolyte solution 117 accommodated in the battery case 110 may leak out of the battery or adhere to the hole peripheral portion 113m of the battery case 110. . However, in the first embodiment, the liquid injection hole 170 is hermetically sealed by the inner sealing member 183 (its insertion portion 184) in the first sealing step described above. Therefore, it is possible to reliably prevent the electrolyte solution 117 from leaking outside the battery. The second sealing step described below can also be performed under atmospheric pressure while keeping the inside of the battery case 110 in a reduced pressure state.

なお、本実施形態１では、前述のように、供給体形成工程を第１封止工程の前に行っているが、供給体形成工程は、第１封止工程の後、第２封止工程の前に行うこともできる。即ち、第１封止工程後、真空チャンバ内を大気圧に戻した後に、外側封止部材１８１の周縁部１８１ｍと、ケース蓋部材１１３の孔周囲部１１３ｍとの隙間から、例えば注射器等を用いて、ケース蓋部材１１３の第１臨空間部１７５ｊ上に、ジエチレングリコールモノブチルエーテルを含有する油性塗料を塗布してもよい。   In the first embodiment, as described above, the supply body forming step is performed before the first sealing step. However, the supply body forming step is performed after the first sealing step, followed by the second sealing step. Can also be done before. That is, after the first sealing step, the inside of the vacuum chamber is returned to atmospheric pressure, and then, for example, a syringe is used from the gap between the peripheral edge portion 181m of the outer sealing member 181 and the hole peripheral portion 113m of the case lid member 113. Then, an oil-based paint containing diethylene glycol monobutyl ether may be applied on the first critical space portion 175j of the case lid member 113.

次に、この大気圧下において第２封止工程を行う。内側封止部材１８３を電池ケース１１０の外部から覆いつつ、外側封止部材１８１を電池ケース１１０（そのケース蓋部材１１３）の孔周囲部１１３ｍに気密かつ環状に固着し、前述の封止空間ＫＣを形成する。具体的には、封止部材１８０のうち、内側封止部材１８３を外部から覆う外側封止部材１８１を、軸線ＢＸ，ＣＸ方向の内側ＢＣ，ＤＣに押圧して、内側封止部材１８３の環状圧接部１８５を凹部１７５の凹部底面１７５ｆ２に圧接させる。これと共に、外側封止部材１８１を凹部１７５内に収容して、外側封止部材１８１の外表面１８１ｄを、ケース蓋部材１１３の外表面１１３ｄと面一にする。この状態で、レーザ溶接を行い、外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとを全周にわたって溶接して平面視円環状の溶接部１８１ｙを形成する。   Next, a second sealing step is performed under this atmospheric pressure. While covering the inner sealing member 183 from the outside of the battery case 110, the outer sealing member 181 is airtightly and annularly fixed to the hole peripheral portion 113m of the battery case 110 (case cover member 113), and the above-described sealing space KC. Form. Specifically, among the sealing members 180, the outer sealing member 181 that covers the inner sealing member 183 from the outside is pressed against the inner sides BC and DC in the directions of the axes BX and CX, and the annular shape of the inner sealing member 183 is reached. The pressure contact portion 185 is brought into pressure contact with the recess bottom surface 175 f 2 of the recess 175. At the same time, the outer sealing member 181 is accommodated in the recess 175 so that the outer surface 181 d of the outer sealing member 181 is flush with the outer surface 113 d of the case lid member 113. In this state, laser welding is performed, and the peripheral portion 181m of the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110 are welded over the entire circumference to form an annular welded portion 181y.

これにより、環状圧接部１８５（その頂面１８５ｃ）が凹部底面１７０ｆ２に密着するので、環状圧接部１８５よりも径方向内側に位置する注液孔１７０は気密に封止される。前述のように、注液孔１７０は、挿入部１８４によっても気密に封止されているので、挿入部１８４と環状圧接部１８５とでそれぞれシールされる。また、溶接により、外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとの間も、気密に封止され、封止空間ＫＣが形成される。   Accordingly, the annular pressure contact portion 185 (its top surface 185c) is in close contact with the recess bottom surface 170f2, so that the liquid injection hole 170 positioned radially inward from the annular pressure contact portion 185 is hermetically sealed. As described above, since the liquid injection hole 170 is hermetically sealed also by the insertion portion 184, it is sealed by the insertion portion 184 and the annular pressure contact portion 185, respectively. Further, the space between the peripheral edge portion 181m of the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110 is also hermetically sealed by welding to form a sealed space KC.

また、封止空間ＫＣ内には、供給体形成工程で塗布形成された塗膜１９０（或いは塗膜１９１，１９２）が存在するので、この塗膜１９０（１９１，１９２）中に含まれるジエチレングリコールモノブチルエーテルが気化したジエチレングリコールモノブチルエーテルガスが、空間内気体ＧＳ１に含まれる。従って、空間内気体ＧＳ１は、ジエチレングリコールモノブチルエーテルガスと大気との混合気体となる。特に、本実施形態１では、溶接より第２封止工程を行っているので、溶接時に発生する熱により、塗膜１９０，１９１，１９２中に含まれるジエチレングリコールモノブチルエーテルが気化し易い。従って、空間内気体ＧＳ１には、この第２封止工程を終えた時点で、既に十分多くのジエチレングリコールモノブチルエーテルガスが含まれる。   Further, in the sealed space KC, there is a coating film 190 (or coating film 191, 192) applied and formed in the supply body forming step, and therefore, the diethylene glycol mono- gen contained in this coating film 190 (191, 192). Diethylene glycol monobutyl ether gas in which butyl ether is vaporized is contained in the space gas GS1. Therefore, the space gas GS1 is a mixed gas of diethylene glycol monobutyl ether gas and the atmosphere. In particular, in Embodiment 1, since the second sealing step is performed rather than welding, the diethylene glycol monobutyl ether contained in the coating films 190, 191, and 192 is easily vaporized by heat generated during welding. Therefore, the space gas GS1 already contains a sufficient amount of diethylene glycol monobutyl ether gas when the second sealing step is completed.

次に、コンディショニング工程において、この電池１００の初期充電を行う。その際、電池ケース１１０内には、水素などの気体が発生する。   Next, in the conditioning process, the battery 100 is initially charged. At that time, a gas such as hydrogen is generated in the battery case 110.

次に、この電池１００について気密検査工程を行う。即ち、検知可能気体が封止空間ＫＣから電池外部に漏れ出るか否かを検査することにより、封止部材１８０のうち外側封止部材１８１の周縁部１８１ｍと電池ケース１１０（そのケース蓋部材１１３）の孔周囲部１１３ｍとの間の気密性を検査する。
この気密検査工程は、電池１００を真空チャンバ内に置いて、真空チャンバ内を減圧する。そして、封止部材１８０の近傍に、検知可能気体であるジエチレングリコールモノブチルエーテルガスを大気中の気体成分と区別して検知可能な炭化水素ガス検知器（例えば、ＨＯＲＩＢＡ製：ＡＰＨＡ−３７０）を設置して、所定時間、ジエチレングリコールモノブチルエーテルガスを検知することにより行う。 Next, an airtight inspection process is performed on the battery 100. That is, by inspecting whether or not detectable gas leaks from the sealing space KC to the outside of the battery, the peripheral portion 181m of the outer sealing member 181 and the battery case 110 (the case lid member 113) of the sealing member 180. ) Is checked for airtightness with the hole surrounding portion 113m.
In this airtightness inspection process, the battery 100 is placed in a vacuum chamber, and the inside of the vacuum chamber is decompressed. Then, in the vicinity of the sealing member 180, a hydrocarbon gas detector (for example, manufactured by HORIBA: APHA-370) capable of detecting diethylene glycol monobutyl ether gas, which is a detectable gas, by distinguishing it from gas components in the atmosphere is installed. Detecting diethylene glycol monobutyl ether gas for a predetermined time.

前述のように、封止空間ＫＣ内には、ジエチレングリコールモノブチルエーテルガスを含む空間内気体ＧＳ１が封入されている。このため、外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとの間に封止不良が生じている場合には、このジエチレングリコールモノブチルエーテルガスが、封止不良のある外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとの間を通じて、電池ケース１１０の外部に漏れ出る。従って、ガス検出器によりジエチレングリコールモノブチルエーテルガスを検知できれば、外側封止部材１８１の周縁部１８１ｍと電池ケース１１０の孔周囲部１１３ｍとの間に封止不良が生じていることが判る。そこで、この封止不良のある電池を排除し、封止不良のない良品の電池１００のみを選別する。かくして、電池１００が完成する。   As described above, the space gas GS1 containing diethylene glycol monobutyl ether gas is sealed in the sealed space KC. For this reason, when a sealing failure occurs between the peripheral edge portion 181m of the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110, the diethylene glycol monobutyl ether gas is used as the outer sealing member with the sealing failure. It leaks out of the battery case 110 through between the peripheral edge portion 181m of the stopper member 181 and the hole peripheral portion 113m of the battery case 110. Accordingly, if diethylene glycol monobutyl ether gas can be detected by the gas detector, it can be seen that a sealing failure has occurred between the peripheral edge portion 181m of the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110. Therefore, the batteries with poor sealing are excluded, and only good batteries 100 without defective sealing are selected. Thus, the battery 100 is completed.

以上で説明したように、本実施形態１に係る電池１００の製造方法は、電池ケース１１０の注液孔１７０（貫通孔）を、電池ケース１１０の外部から内側封止部材（ゴム栓部）１８３で塞いで、注液孔１７０を気密に封止する第１封止工程を備える。また、電池１００の製造方法は、第１封止工程の後、内側封止部材１８３を外部から覆いつつ、外側封止部材１８１を電池ケース１１０（そのケース蓋部材１１３）の孔周囲部１１３ｍに気密かつ環状に固着し、封止空間ＫＣを形成する第２封止工程を備える。また、電池１００の製造方法は、少なくとも第２封止工程よりも前に、電池ケース１１０（そのケース蓋部材１１３）のうち、封止空間ＫＣを臨む部位である第１臨空間部１７５ｊ、内側封止部材１８３のうち、封止空間ＫＣを臨む部位である第２臨空間部１８５ｊ、及び、外側封止部材１８１のうち、封止空間ＫＣを臨む部位である第３臨空間部１８１ｊの少なくともいずれかの上に、塗膜（気体供給体）１９０，１９１，１９２を配置する供給体配置工程を備える。   As described above, in the method of manufacturing the battery 100 according to the first embodiment, the liquid injection hole 170 (through hole) of the battery case 110 is connected to the inner sealing member (rubber plug portion) 183 from the outside of the battery case 110. And a first sealing step of sealing the liquid injection hole 170 in an airtight manner. Further, in the method for manufacturing the battery 100, after the first sealing step, the outer sealing member 181 is covered with the hole peripheral portion 113m of the battery case 110 (the case lid member 113) while covering the inner sealing member 183 from the outside. A second sealing step is provided which is hermetically and annularly fixed and forms a sealing space KC. In addition, the method for manufacturing the battery 100 is such that, at least before the second sealing step, in the battery case 110 (the case lid member 113), the first temporary space portion 175j that is a portion facing the sealing space KC, the inner side Of the sealing member 183, at least a second critical space portion 185j that is a portion facing the sealing space KC and a third critical space portion 181j that is a portion facing the sealing space KC of the outer sealing member 181. The supply body arrangement | positioning process which arrange | positions the coating film (gas supply body) 190,191,192 on either is provided.

このように第１封止工程では、内側封止部材１８３で注液孔１７０を気密に封止するので、その後、第２封止工程までの間に、電池ケース１１０内に収容された電解液１１７が注液孔１７０を通じて電池ケース１１０の外部（孔周囲部１１３ｍ等）に漏れ出るのを防止できる。従って、第２封止工程の際に、注液孔１７０から漏れ出た電解液１１７が外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間に入り込んで、封止不良が生じるのを防止でき、外側封止部材１８１と孔周囲部１１３ｍとを確実に固着できる。   As described above, in the first sealing step, the liquid injection hole 170 is hermetically sealed by the inner sealing member 183. Therefore, the electrolytic solution accommodated in the battery case 110 after that until the second sealing step. It is possible to prevent the 117 from leaking to the outside of the battery case 110 (such as the hole surrounding portion 113m) through the liquid injection hole 170. Therefore, in the second sealing step, the electrolyte solution 117 leaking from the injection hole 170 enters between the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110, resulting in poor sealing. The outer sealing member 181 and the hole surrounding portion 113m can be securely fixed.

また、供給体配置工程において、封止空間ＫＣに臨む部位である第１臨空間部１７５ｊ、第２臨空間部１８５ｊ及び第３臨空間部１８１ｊの少なくともいずれかの上に、塗膜１９０，１９１，１９２を配置する。そして、第２封止工程において、外側封止部材１８１を電池ケース１１０に固着して封止空間ＫＣを形成する。このようにすることで、封止空間ＫＣ内に容易に塗膜１９０（或いは塗膜１９１，１９２）を配置でき、この塗膜１９０（１９１，１９２）から発生する検知可能気体（本実施形態１ではジエチレングリコールモノブチルエーテルガス）を封止空間ＫＣ内に供給できる。   Further, in the supply body arranging step, the coating films 190, 191 are formed on at least one of the first living space portion 175j, the second living space portion 185j, and the third living space portion 181j, which are parts facing the sealing space KC. , 192 are arranged. In the second sealing step, the outer sealing member 181 is fixed to the battery case 110 to form the sealing space KC. By doing in this way, the coating film 190 (or coating film 191, 192) can be easily arrange | positioned in the sealing space KC, and the detectable gas (this Embodiment 1) generate | occur | produced from this coating film 190 (191, 192) Then, diethylene glycol monobutyl ether gas) can be supplied into the sealed space KC.

従って、この第２封止工程後の電池１００では、内側封止部材１８１で注液孔１７０が気密に封止されているにも拘わらず、外側封止部材１８３と電池ケース１１０（その孔周囲部１１３ｍ）との間の気密性を容易かつ確実に検査できる。即ち、塗膜１９０（１９１，１９２）から封止空間ＫＣに供給された検知可能気体であるジエチレングリコールモノブチルエーテルガスが、封止空間ＫＣから電池外部に漏れ出るか否かを検査することにより、外側封止部材１８１と電池ケース１１０（その孔周囲部１１３ｍ）との間の気密性を容易かつ確実に検査できる。   Therefore, in the battery 100 after the second sealing step, the outer sealing member 183 and the battery case 110 (around the hole) are sealed even though the liquid injection hole 170 is hermetically sealed by the inner sealing member 181. And 113m) can be inspected easily and reliably. That is, it is determined whether or not diethylene glycol monobutyl ether gas, which is a detectable gas supplied from the coating film 190 (191, 192) to the sealed space KC, leaks out of the battery from the sealed space KC. The airtightness between the sealing member 181 and the battery case 110 (the hole surrounding portion 113m) can be easily and reliably inspected.

更に、本実施形態１では、第２封止工程の後、検知可能気体が封止空間ＫＣから電池外部に漏れ出るか否かを検査することにより、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間の気密性を検査する気密検査工程を備える。このため、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間に封止不良が生じている電池を確実に排除できる。従って、外側封止部材１８１と電池ケース１１０との間の気密性を容易かつ確実に検査した電池１００を製造できる。   Further, in the first embodiment, after the second sealing step, it is inspected whether detectable gas leaks from the sealing space KC to the outside of the battery, whereby the holes of the outer sealing member 181 and the battery case 110 are detected. An airtight inspection process for inspecting airtightness with the surrounding portion 113m is provided. For this reason, the battery in which the sealing defect has arisen between the outer side sealing member 181 and the hole surrounding part 113m of the battery case 110 can be excluded reliably. Therefore, the battery 100 in which the airtightness between the outer sealing member 181 and the battery case 110 is easily and reliably inspected can be manufactured.

また、本実施形態１では、第１封止工程は、減圧下で行い、第２封止工程は、大気圧下で行う。第１封止工程を減圧下で行うことで、この第１封止後の電池ケース１１０内を減圧状態（負圧）にすることができる。このため、第２封止工程後に行うコンディショニング工程（初期充電工程）の際やその後の使用において、電池ケース１１０内に気体が発生しても、電池ケース１１０の内圧が早期に高くなるのを防止できる。一方、溶接等を行う第２封止工程は、大気圧下で行うので、減圧下で行う場合に比して、第２封止工程を容易に行うことができる。   In the first embodiment, the first sealing step is performed under reduced pressure, and the second sealing step is performed under atmospheric pressure. By performing the first sealing step under reduced pressure, the inside of the battery case 110 after the first sealing can be in a reduced pressure state (negative pressure). For this reason, the internal pressure of the battery case 110 is prevented from becoming high at an early stage even if gas is generated in the battery case 110 during the conditioning process (initial charging process) performed after the second sealing process or in subsequent use. it can. On the other hand, since the 2nd sealing process which performs welding etc. is performed under atmospheric pressure, compared with the case where it carries out under reduced pressure, the 2nd sealing process can be performed easily.

（実施形態２）
次いで、第２の実施の形態について説明する。本実施形態２に係るリチウムイオン二次電池（電池）２００では、封止部材２８０及び気体供給体２９０が（図９及び図１０参照）、実施形態１に係る電池１００の封止部材１８０及び気体供給体１９０，１９１，１９２と異なる。また、これに伴って、電池２００の製造方法も、実施形態１に係る電池１００の製造方法と異なる。それ以外は、実施形態１と同様であるので、実施形態１と同様な部分の説明は、省略または簡略化する。 (Embodiment 2)
Next, a second embodiment will be described. In the lithium ion secondary battery (battery) 200 according to the second embodiment, the sealing member 280 and the gas supply body 290 (see FIGS. 9 and 10), the sealing member 180 and the gas of the battery 100 according to the first embodiment. Different from the supply bodies 190, 191, 192. Accordingly, the manufacturing method of the battery 200 is also different from the manufacturing method of the battery 100 according to the first embodiment. Other than that, the second embodiment is the same as the first embodiment, and the description of the same parts as the first embodiment is omitted or simplified.

本実施形態２に係る封止部材２８０は、上記実施形態１で説明した外側封止部材１８１と内側封止部材１８３とを有するが、これらの間には、これらを互いに接着する接着層（気体供給体）２９０が介在している。具体的には、この接着層２９０は、外側封止部材１８１の内表面１８１ｃの全面にベタ状に形成されている。このため、この接着層２９０は、外側封止部材１８１のうち、封止空間ＫＣを臨む部位である第３臨空間部１８１ｊ上にも存在する。また、この接着層２９０は、ジエチレングリコールモノブチルエーテルを含んでいるので、接着層２９０からジエチレングリコールモノブチルエーテルガスが発生する。従って、この接着層２９０は、外側封止部材１８１と内側封止部材１８３とを接着するだけでなく、検知可能気体であるジエチレングリコールモノブチルエーテルガスを封止空間ＫＣ内に供給する気体供給体としても機能する。   The sealing member 280 according to the second embodiment includes the outer sealing member 181 and the inner sealing member 183 described in the first embodiment, and an adhesive layer (gas) that bonds them to each other between them. Supply body) 290 is interposed. Specifically, the adhesive layer 290 is formed in a solid shape on the entire inner surface 181 c of the outer sealing member 181. For this reason, this adhesive layer 290 also exists on the third temporary space 181j, which is the portion of the outer sealing member 181 that faces the sealing space KC. Further, since the adhesive layer 290 contains diethylene glycol monobutyl ether, diethylene glycol monobutyl ether gas is generated from the adhesive layer 290. Therefore, the adhesive layer 290 not only bonds the outer sealing member 181 and the inner sealing member 183, but also serves as a gas supply body that supplies diethylene glycol monobutyl ether gas, which is a detectable gas, into the sealed space KC. Function.

この封止部材２８０は、例えば次のようにして形成する。金属板からなる外側封止部材１８１と、ゴム状弾性体からなる内側封止部材１９３とを、それぞれ別々に形成する。そして、外側封止部材１８１の内表面１８１ｃの全面に、ジエチレングリコールモノブチルエーテルを含有する接着剤を塗布し、この接着剤を介して、外側封止部材１８１の内表面１８１ｃに内側封止部材１８３を重ねる（挿入部１８４の底面１８４ｄ及び環状圧接部１８５の底面１８５ｄを重ねる）。その後、塗布した接着剤を乾燥させて、接着層２９０を形成すればよい。
なお、乾燥後の接着層２９０に十分な量のジエチレングリコールモノブチルエーテルが残るように、接着層２９０の厚み及び乾燥条件等を調整しておく。また、本実施形態２では、この接着層２９０を形成する工程が、前述の供給体形成工程にも相当する。 For example, the sealing member 280 is formed as follows. An outer sealing member 181 made of a metal plate and an inner sealing member 193 made of a rubber-like elastic body are formed separately. Then, an adhesive containing diethylene glycol monobutyl ether is applied to the entire inner surface 181c of the outer sealing member 181, and the inner sealing member 183 is attached to the inner surface 181c of the outer sealing member 181 through this adhesive. Overlay (the bottom surface 184d of the insertion portion 184 and the bottom surface 185d of the annular pressure contact portion 185 overlap). Thereafter, the applied adhesive may be dried to form the adhesive layer 290.
Note that the thickness, drying conditions, and the like of the adhesive layer 290 are adjusted so that a sufficient amount of diethylene glycol monobutyl ether remains in the adhesive layer 290 after drying. In the second embodiment, the step of forming the adhesive layer 290 corresponds to the above-described supply body forming step.

本実施形態２に係る電池２００も、内側封止部材１８３で注液孔１７０が気密に封止されているにも拘わらず、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間の気密性を容易かつ確実に検査できる。即ち、接着層２９０から封止空間ＫＣに供給された検知可能気体（本実施形態２ではジエチレングリコールモノブチルエーテルガス）が、封止空間ＫＣから電池外部に漏れ出るか否かを検査することにより、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間の気密性を容易かつ確実に検査できる。その他、実施形態１の電池１００及びその製造方法と同様な部分は、実施形態１と同様な作用効果を奏する。   Even in the battery 200 according to the second embodiment, the liquid injection hole 170 is hermetically sealed by the inner sealing member 183, but between the outer sealing member 181 and the hole peripheral portion 113 m of the battery case 110. The airtightness of the can be inspected easily and reliably. That is, by detecting whether the detectable gas (diethylene glycol monobutyl ether gas in the second embodiment) supplied from the adhesive layer 290 to the sealed space KC leaks from the sealed space KC to the outside of the battery, The airtightness between the sealing member 181 and the hole peripheral portion 113m of the battery case 110 can be easily and reliably inspected. In addition, the same parts as those of the battery 100 and the manufacturing method thereof according to the first embodiment have the same effects as those of the first embodiment.

（実施形態３）
次いで、第３の実施の形態について説明する。本実施形態３に係るリチウムイオン二次電池（電池）３００では、封止部材３８０、気体供給体３８４及び空間内気体ＧＳ３（図１１参照）、実施形態１，２に係る電池１００，２００の封止部材１８０，２８０、気体供給体１９０，１９１，１９２，２９０及び空間内気体ＧＳ１と異なる。また、これに伴って、電池３００の製造方法も、実施形態１，２に係る電池１００，２００の製造方法と異なる。それ以外は、実施形態１または２と同様であるので、実施形態１または２と同様な部分の説明は、省略または簡略化する。 (Embodiment 3)
Next, a third embodiment will be described. In the lithium ion secondary battery (battery) 300 according to the third embodiment, the sealing member 380, the gas supply body 384, the space gas GS3 (see FIG. 11), and the batteries 100 and 200 according to the first and second embodiments are sealed. It is different from the stop members 180, 280, the gas supply bodies 190, 191, 192, 290 and the space gas GS1. Accordingly, the manufacturing method of the battery 300 is also different from the manufacturing methods of the batteries 100 and 200 according to the first and second embodiments. Other than that, the second embodiment is the same as the first or second embodiment, and the description of the same portions as the first or second embodiment is omitted or simplified.

本実施形態３に係る封止部材３８０は、外側封止部材１８１と内側封止部材３８３とからなる。このうち外側封止部材１８１は、実施形態１に係る外側封止部材１８１と同様である。また、内側封止部材３８３は、実施形態１に係る内側封止部材１８３と同様な形状を有する。即ち、この内側封止部材３８３も、径小な頂面３８４ｃ、径大な底面３８４ｄ、及びこれらを結ぶ側面３８４ｆを有する円錐台状の挿入部３８４の周囲に、頂面３８５ｃ、底面３８５ｄ及び外側面３８５ｆを有する環状圧接部３８５が、一体に繋がったものである。   The sealing member 380 according to the third embodiment includes an outer sealing member 181 and an inner sealing member 383. Among these, the outer sealing member 181 is the same as the outer sealing member 181 according to the first embodiment. The inner sealing member 383 has the same shape as the inner sealing member 183 according to the first embodiment. That is, the inner sealing member 383 also has a top surface 385c, a bottom surface 385d, and an outer surface around a truncated cone-shaped insertion portion 384 having a small top surface 384c, a large bottom surface 384d, and a side surface 384f connecting them. An annular pressure contact portion 385 having a side surface 385f is integrally connected.

但し、本実施形態３に係る内側封止部材（ゴム栓部）３８３は、ステアリン酸を含んだゴム状弾性体からなる。このため、内側封止部材３８３からステアリン酸ガスが発生し、このステアリン酸ガスが封止空間ＫＣ内に供給される。より詳細には、内側封止部材３８３の環状圧接部３８５のうち、封止空間ＫＣを臨む部位である第２臨空間部３８５ｊから発生したステアリン酸ガスが、封止空間ＫＣ内に供給される。従って、本実施液体３に係る空間内気体ＧＳ３は、検知可能気体であるステアリン酸ガスと大気とのステアリン酸−大気混合気体となっている。このように、本実施形態３では、内側封止部材３８３の第２臨空間部３８５ｊ自身が、気体供給体としても機能する。   However, the inner sealing member (rubber plug portion) 383 according to the third embodiment is made of a rubber-like elastic body containing stearic acid. For this reason, stearic acid gas is generated from the inner sealing member 383, and this stearic acid gas is supplied into the sealed space KC. More specifically, the stearic acid gas generated from the second space portion 385j, which is the portion facing the sealing space KC, of the annular pressure contact portion 385 of the inner sealing member 383 is supplied into the sealing space KC. . Accordingly, the gas GS3 in the space according to the present embodiment liquid 3 is a stearic acid-air mixed gas of stearic acid gas that is a detectable gas and the atmosphere. Thus, in the third embodiment, the second near-space portion 385j itself of the inner sealing member 383 also functions as a gas supply body.

この封止部材３８０は、例えば次のようにして形成する。金属板からなる外側封止部材１８１を射出成形用の金型にセットする。そして、エチレンプロピレンジエンゴム（ＥＰＤＭ）とステアリン酸とを混ぜ、これを射出成形して、内側封止部材３８３を外側封止部材１８１と一体に成形すればよい。なお、本実施形態３では、この内側封止部材３８３を形成する工程が、前述の供給体形成工程にも相当する。   The sealing member 380 is formed as follows, for example. An outer sealing member 181 made of a metal plate is set in a mold for injection molding. Then, ethylene propylene diene rubber (EPDM) and stearic acid may be mixed, injection molded, and the inner sealing member 383 may be molded integrally with the outer sealing member 181. In the third embodiment, the step of forming the inner sealing member 383 corresponds to the above-described supply body forming step.

本実施形態３に係る電池３００も、内側封止部材３８３で注液孔１７０が気密に封止されているにも拘わらず、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間の気密性を容易かつ確実に検査できる。即ち、内側封止部材３８３の第２臨空間部（気体供給体）３８５ｊから、封止空間ＫＣに供給された検知可能気体（本実施形態３ではステアリン酸ガス）が、封止空間ＫＣから電池外部に漏れ出るか否かを検査する。これにより、外側封止部材１８１と電池ケース１１０の孔周囲部１１３ｍとの間の気密性を容易かつ確実に検査できる。   Even in the battery 300 according to the third embodiment, the liquid injection hole 170 is hermetically sealed by the inner sealing member 383, but between the outer sealing member 181 and the hole peripheral portion 113 m of the battery case 110. The airtightness of the can be inspected easily and reliably. That is, the detectable gas (stearic acid gas in the third embodiment) supplied from the second near-space portion (gas supply body) 385j of the inner sealing member 383 to the sealed space KC is discharged from the sealed space KC to the battery. Inspect whether it leaks outside. Thereby, the airtightness between the outer sealing member 181 and the hole peripheral portion 113m of the battery case 110 can be easily and reliably inspected.

また、本実施形態３では、内側封止部材（ゴム栓部）３８３のうち、少なくとも、封止空間ＫＣに臨む部位である第２臨空間部（臨空間部）３８５ｊ自身が、気体供給体を兼ねる。このため、例えば実施形態１，２のように気体供給体を別途形成する必要がなく、しかも、内側封止部材（ゴム栓部）３８３の第２臨空間部３８５ｊから発生した検知可能気体（本実施形態３ではステアリン酸ガス）を、確実に封止空間ＫＣに供給できる。その他、実施形態１または２の電池１００，２００及びその製造方法と同様な部分は、実施形態１または２と同様な作用効果を奏する。   In the third embodiment, among the inner sealing member (rubber plug portion) 383, at least the second living space portion (standing space portion) 385j itself that is the portion facing the sealing space KC serves as the gas supply body. I also serve. For this reason, it is not necessary to separately form a gas supply body as in the first and second embodiments, for example, and the detectable gas generated from the second near-space portion 385j of the inner sealing member (rubber plug portion) 383 (this book) In the third embodiment, stearic acid gas) can be reliably supplied to the sealed space KC. In addition, the same parts as those of the batteries 100 and 200 of Embodiment 1 or 2 and the manufacturing method thereof have the same effects as those of Embodiment 1 or 2.

（実施形態４）
次いで、第４の実施の形態について説明する。本実施形態４に係るハイブリッド自動車（車両）７００（以下、単に自動車７００とも言う）は、実施形態１に係る電池１００を搭載し、この電池１００に蓄えた電気エネルギを、駆動源の駆動エネルギの全部または一部として使用するものである（図１２参照）。 (Embodiment 4)
Next, a fourth embodiment will be described. A hybrid vehicle (vehicle) 700 (hereinafter also simply referred to as an automobile 700) according to the fourth embodiment is equipped with the battery 100 according to the first embodiment, and the electric energy stored in the battery 100 is used as the drive energy of the drive source. It is used as all or part (see FIG. 12).

この自動車７００は、電池１００を複数組み合わせた組電池７１０を搭載し、エンジン７４０、フロントモータ７２０及びリアモータ７３０を併用して駆動するハイブリッド自動車である。具体的には、この自動車７００は、その車体７９０に、エンジン７４０と、フロントモータ７２０及びリアモータ７３０と、組電池７１０（電池１００）と、ケーブル７５０と、インバータ７６０とを搭載する。そして、この自動車７００は、組電池７１０（電池１００）に蓄えられた電気エネルギを用いて、フロントモータ７２０及びリアモータ７３０を駆動できるように構成されている。
前述したように、電池１００は、長期間にわたり封止部材１８０の外側封止部材１８１で注液孔１７０を気密に封止できるので、この自動車７００の耐久性を高くできる。なお、実施形態１に係る電池１００に代えて、実施形態２または３に係る電池２００，３００を搭載してもよい。 The automobile 700 is a hybrid automobile equipped with an assembled battery 710 in which a plurality of batteries 100 are combined and driven by using an engine 740, a front motor 720, and a rear motor 730 in combination. Specifically, the automobile 700 includes an engine 740, a front motor 720 and a rear motor 730, an assembled battery 710 (battery 100), a cable 750, and an inverter 760 on the vehicle body 790. The automobile 700 is configured to be able to drive the front motor 720 and the rear motor 730 using electrical energy stored in the assembled battery 710 (battery 100).
As described above, since the battery 100 can hermetically seal the liquid injection hole 170 with the outer sealing member 181 of the sealing member 180 for a long period of time, the durability of the automobile 700 can be increased. Instead of the battery 100 according to the first embodiment, the batteries 200 and 300 according to the second or third embodiment may be mounted.

（実施形態５）
次いで、第５の実施の形態について説明する。本実施形態５のハンマードリル８００は、実施形態１に係る電池１００を搭載した電池使用機器である（図１３参照）。このハンマードリル８００は、本体８２０の底部８２１に、電池１００を含むバッテリパック８１０が収容されており、このバッテリパック８１０を、ドリルを駆動するためのエネルギー源として利用している。
前述したように、電池１００は、長期間にわたり封止部材１８０の外側封止部材１８１で注液孔１７０を気密に封止できるので、このハンマードリル８００の耐久性を高くできる。なお、実施形態１に係る電池１００に代えて、実施形態２または３に係る電池２００，３００を搭載してもよい。 (Embodiment 5)
Next, a fifth embodiment will be described. A hammer drill 800 according to the fifth embodiment is a battery-using device equipped with the battery 100 according to the first embodiment (see FIG. 13). In the hammer drill 800, a battery pack 810 including the battery 100 is accommodated in a bottom portion 821 of a main body 820, and the battery pack 810 is used as an energy source for driving the drill.
As described above, since the battery 100 can hermetically seal the liquid injection hole 170 with the outer sealing member 181 of the sealing member 180 for a long period of time, the durability of the hammer drill 800 can be enhanced. Instead of the battery 100 according to the first embodiment, the batteries 200 and 300 according to the second or third embodiment may be mounted.

以上において、本発明を実施形態に即して説明したが、本発明は上述の実施形態１〜５に限定されるものではなく、その要旨を逸脱しない範囲で、適宜変更して適用できることは言うまでもない。   In the above, the present invention has been described with reference to the embodiments. However, the present invention is not limited to the above-described first to fifth embodiments, and it is needless to say that the present invention can be appropriately modified and applied without departing from the gist thereof. Yes.

例えば、実施形態１〜３では、電池ケースの内外を連通する「貫通孔」として、電解液１１７を注入するための注液孔１７０を例示したが、貫通孔は注液孔に限られない。貫通孔としては、例えば、電池ケース内の気体を抜くための通気孔などが挙げられる。また、実施形態１〜３では、「貫通孔」を、電池ケース１１０のうちケース蓋部材１１３に設けたが、貫通孔の形成位置はこれに限られない。貫通孔は、例えば、ケース本体部材１１１の側面や底面に設けてもよい。また、実施形態１〜３では、「貫通孔」の形態を円孔としたが、貫通孔の形態も適宜変更できる。   For example, in Embodiments 1 to 3, the liquid injection hole 170 for injecting the electrolytic solution 117 is exemplified as the “through hole” that communicates the inside and outside of the battery case, but the through hole is not limited to the liquid injection hole. Examples of the through hole include a vent hole for venting gas from the battery case. In the first to third embodiments, the “through hole” is provided in the case lid member 113 of the battery case 110, but the formation position of the through hole is not limited thereto. For example, the through hole may be provided on a side surface or a bottom surface of the case main body member 111. In Embodiments 1 to 3, although the “through hole” is a circular hole, the shape of the through hole can be changed as appropriate.

また、実施形態１〜３では、「電極体」として、各々帯状をなす正極板１２１及び負極板１３１をセパレータ１４１を介して互いに重ねて捲回してなる捲回型の電極体１２０を例示したが、電極体の形態はこれに限られない。例えば、電極体を、各々所定形状（例えば矩形状など）をなす正極板及び負極板をセパレータを介して交互に複数積層してなる積層型としてもよい。   In the first to third embodiments, as the “electrode body”, the wound-type electrode body 120 in which the positive electrode plate 121 and the negative electrode plate 131 each having a band shape are wound on each other via the separator 141 is illustrated. The form of the electrode body is not limited to this. For example, the electrode body may be a stacked type in which a plurality of positive and negative electrode plates each having a predetermined shape (for example, a rectangular shape) are alternately stacked via a separator.

また、実施形態１〜３では、「内側封止部材」として、その全体がゴム栓部とされた内側封止部材１８３，３８３を例示したが、内側封止部材の形態はこれに限られない。例えば、内側封止部材を、円錐台状等のゴム栓部に、これを外部から覆う板状等の被覆部材が接合された形態とすることもできる。このように内側封止部材がゴム栓部以外の部位を有する場合、ゴム栓部以外の部位は、金属など、ゴム状弾性体をなす材質以外の材質で形成することができる。   In the first to third embodiments, the inner sealing members 183 and 383, which are rubber plugs as a whole, are exemplified as the “inner sealing member”, but the form of the inner sealing member is not limited to this. . For example, the inner sealing member may be in a form in which a cover member such as a plate that covers this from the outside is joined to a rubber plug portion such as a truncated cone. In this way, when the inner sealing member has a portion other than the rubber plug portion, the portion other than the rubber plug portion can be formed of a material other than the material forming the rubber-like elastic body, such as metal.

また、実施形態１〜３では、「ゴム栓部」として、円錐台状の挿入部１８４，３８４と円環状の環状圧接部１８５，３８５とが一体に繋がったゴム栓部（内側封止部材）１８３，３８３を例示したが、ゴム栓部の形態はこれに限定されない。例えば、ゴム栓部を、実施形態１〜３で示したような円錐台状の挿入部のみからなる形態とすることができる。このように挿入部のみからなるゴム栓部でも、自身の弾性によって、貫通孔を電池ケースの外部から気密に封止できる。   In the first to third embodiments, as the “rubber plug portion”, the rubber plug portion (inner sealing member) in which the truncated cone-shaped insertion portions 184 and 384 and the annular annular pressure contact portions 185 and 385 are integrally connected. Although 183 and 383 are exemplified, the form of the rubber plug portion is not limited to this. For example, the rubber plug portion can be configured by only the truncated cone-shaped insertion portion as shown in the first to third embodiments. As described above, even with the rubber plug portion including only the insertion portion, the through hole can be hermetically sealed from the outside of the battery case by its own elasticity.

また、実施形態１〜３では、「ゴム栓部」として、エチレンプロピレンジエンゴム（ＥＰＤＭ）を有するゴム栓部（内側封止部材）１８３，３８３を例示したが、ゴム栓部をなすゴム状弾性体の材質はこれに限られない。ゴム状弾性体の材質として、例えば、アクリルゴム（ＡＣＭ）、ニトリルゴム（ＮＢＲ）、イソプレンゴム（ＩＲ）、ウレタンゴム（Ｕ）、クロロスルホン化ポリエチレン（ＣＳＭ）、エピクロルヒドリンゴム（ＣＯ，ＥＣＯ）、クロロプレンゴム（ＣＲ）、シリコーンゴム（Ｑ）、スチレン・ブタジエンゴム（ＳＢＲ）、ブタジエンゴム（ＢＲ）、フッ素ゴム（ＦＫＭ）、ブチルゴム（ＩＩＲ）などが挙げられる。   In Embodiments 1 to 3, rubber plug portions (inner sealing members) 183 and 383 having ethylene propylene diene rubber (EPDM) are exemplified as the “rubber plug portion”. However, the rubber-like elasticity forming the rubber plug portion is exemplified. The material of the body is not limited to this. Examples of the rubber-like elastic material include acrylic rubber (ACM), nitrile rubber (NBR), isoprene rubber (IR), urethane rubber (U), chlorosulfonated polyethylene (CSM), epichlorohydrin rubber (CO, ECO), Examples include chloroprene rubber (CR), silicone rubber (Q), styrene-butadiene rubber (SBR), butadiene rubber (BR), fluorine rubber (FKM), and butyl rubber (IIR).

また、実施形態１〜３では、「外側封止部材」として、金属（具体的にアルミニウム）からなる円板状の外側封止部材１８１を例示したが、外側封止部材の材質や形状は、適宜変更できる。
また、実施形態１〜３では、電池ケース１１０に設けた凹部１７５に、外側封止部材１８１を嵌合させた状態で、外側封止部材１８１を電池ケース１１０に固着しているが、この形態に限られない。例えば、外側封止部材の径を外側封止部材１８１よりも更に大きくして、外側封止部材の周縁部を、凹部１７５の周囲に電池ケース１１０の外部から当接させ、この状態で外側封止部材を電池ケース１１０に固着してもよい。 In the first to third embodiments, as the “outer sealing member”, the disk-shaped outer sealing member 181 made of metal (specifically aluminum) is exemplified, but the material and shape of the outer sealing member are: It can be changed as appropriate.
In the first to third embodiments, the outer sealing member 181 is fixed to the battery case 110 in a state where the outer sealing member 181 is fitted in the recess 175 provided in the battery case 110. Not limited to. For example, the diameter of the outer sealing member is made larger than that of the outer sealing member 181, and the peripheral edge of the outer sealing member is brought into contact with the periphery of the recess 175 from the outside of the battery case 110. The stop member may be fixed to the battery case 110.

また、実施形態１〜３では、溶接により、外側封止部材１８１を電池ケース１１０の孔周囲部１１３ｍに固着したが、固着方法はこれに限られない。例えば、ロウ材やハンダ、接着剤等を用いて、或いは、加締めや巻き締め等により、外側封止部材を電池ケースの孔周囲部に固着してもよい。   In the first to third embodiments, the outer sealing member 181 is fixed to the hole peripheral portion 113m of the battery case 110 by welding, but the fixing method is not limited thereto. For example, the outer sealing member may be fixed to the hole peripheral portion of the battery case by using brazing material, solder, adhesive, or the like, or by caulking or winding.

また、「検知可能気体」として、実施形態１，２ではジエチレングリコールモノブチルエーテルガス、実施形態３ではステアリン酸ガスを例示したが、前述のように、検知可能気体はこれらに限られない。
また、「気体供給体」として、実施形態１では、検知可能気体を供給する塗膜１９０，１９１，１９２を例示し、実施形態２では、検知可能気体を供給する接着層２９０を例示し、実施形態３では、検知可能気体を供給する内側封止部材（ゴム栓部）３８３の第２臨空間部（臨空間部）３８５ｊを例示したが、気体供給体はこれらに限られない。気体供給体としては、例えば、ガス化して検知可能気体となる物質やこれを内包したマイクロカプセルを含むゲルや、検知可能気体自身を、或いはガス化して検知可能気体となる物質（液体または固体）を内包したマイクロカプセル、ガス化して検知可能気体となる物質（液体）を含浸させたスポンジなどが挙げられる。 Further, as “detectable gas”, diethylene glycol monobutyl ether gas is exemplified in Embodiments 1 and 2, and stearic acid gas is exemplified in Embodiment 3, but as described above, the detectable gas is not limited thereto.
In addition, as the “gas supply body”, the first embodiment exemplifies coating films 190, 191, and 192 that supply a detectable gas, and the second embodiment exemplifies an adhesive layer 290 that supplies a detectable gas. In the third embodiment, the second front space portion (front space portion) 385j of the inner sealing member (rubber plug portion) 383 that supplies the detectable gas is exemplified, but the gas supply body is not limited thereto. Examples of the gas supplier include a substance that is gasified to become a detectable gas, a gel including a microcapsule containing the substance, a detectable gas itself, or a substance that is gasified to become a detectable gas (liquid or solid). And a sponge impregnated with a substance (liquid) that is gasified to become a detectable gas.

また、実施形態４では、本発明に係る電池１００，２００，３００を搭載する車両として、ハイブリッド自動車７００を例示したが、これに限られない。本発明に係る電池を搭載する車両としては、例えば、電気自動車、プラグインハイブリッド自動車、ハイブリッド鉄道車両、フォークリフト、電気車いす、電動アシスト自転車、電動スクータなどが挙げられる。   Moreover, although the hybrid vehicle 700 was illustrated in Embodiment 4 as a vehicle carrying the battery 100, 200, 300 which concerns on this invention, it is not restricted to this. Examples of the vehicle on which the battery according to the present invention is mounted include an electric vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric wheelchair, an electrically assisted bicycle, and an electric scooter.

また、実施形態５では、本発明に係る電池１００，２００，３００を搭載する電池使用機器して、ハンマードリル８００を例示したが、これに限られない。本発明に係る電池を搭載する電池使用機器としては、例えば、パーソナルコンピュータ、携帯電話、電池駆動の電動工具、無停電電源装置など、電池で駆動される各種の家電製品、オフィス機器、産業機器などが挙げられる。   In the fifth embodiment, the hammer drill 800 is illustrated as an example of a battery-using device on which the batteries 100, 200, and 300 according to the present invention are mounted. Examples of battery-powered devices equipped with the battery according to the present invention include personal computers, mobile phones, battery-powered electric tools, uninterruptible power supply devices, various home appliances driven by batteries, office equipment, industrial equipment, etc. Is mentioned.

１００，２００，３００ リチウムイオン二次電池（電池）
１１０ 電池ケース
１１１ ケース本体部材
１１３ ケース蓋部材
１１３ｃ 内表面
１１３ｄ 外表面
１１３ｍ 孔周囲部
１１７ 電解液
１２０ 電極体
１５０ 正極端子
１６０ 負極端子
１７０ 注液孔（貫通孔）
１７５ 凹部
１７５ｊ 第１臨空間部
１８０，２８０，３８０ 封止部材
１８１ 外側封止部材
１８１ｊ 第３臨空間部
１８１ｍ 周縁部
１８１ｙ 溶接部
１８３，３８３ 内側封止部材（ゴム栓部）
１８４，３８４ 挿入部
１８５，３８５ 環状圧接部
１８５ｊ 第２臨空間部
３８５ｊ 第２臨空間部（気体供給体）
１９０，１９１，１９２ 塗膜（気体供給体）
２９０ 接着層（気体供給体）
７００ ハイブリッド自動車（車両）
７１０ 組電池
８００ ハンマードリル（電池使用機器）
８１０ バッテリパック
ＧＳ１，ＧＳ３ 空間内気体
ＫＣ 封止空間 100, 200, 300 Lithium ion secondary battery (battery)
110 Battery Case 111 Case Body Member 113 Case Cover Member 113c Inner Surface 113d Outer Surface 113m Hole Perimeter 117 Electrolyte 120 Electrode Body 150 Positive Terminal 160 Negative Terminal 170 Injecting Hole (Through Hole)
175 Concave portion 175j First standing space portion 180, 280, 380 Sealing member 181 Outside sealing member 181j Third standing space portion 181m Peripheral portion 181y Welding portions 183, 383 Inside sealing member (rubber plug portion)
184, 384 Insertion portion 185, 385 Annular pressure contact portion 185j Second critical space portion 385j Second critical space portion (gas supply body)
190,191,192 Coating (gas supply)
290 Adhesive layer (gas supply)
700 Hybrid vehicle (vehicle)
710 battery pack 800 hammer drill (equipment using batteries)
810 Battery pack GS1, GS3 Gas in space KC Sealing space

Claims (5)

自身の内外を連通する貫通孔を有する電池ケースと、
前記電池ケース内に収容された電極体と、
ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、
前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、
前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、
前記封止空間内に存在する気体である空間内気体は、
前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、
前記封止空間へ前記検知可能気体を供給する気体供給体を有し、
前記電池ケースのうち、前記封止空間を臨む部位を、第１臨空間部とし、
前記内側封止部材のうち、前記封止空間を臨む部位を、第２臨空間部とし、
前記外側封止部材のうち、前記封止空間を臨む部位を、第３臨空間部としたとき、
前記気体供給体は、
前記第１臨空間部、前記第２臨空間部、及び、前記第３臨空間部の少なくともいずれかの上に配置されてなる
電池。 A battery case having a through-hole communicating with the inside and outside of itself;
An electrode body housed in the battery case;
An inner sealing member comprising a rubber-like elastic body, and having a rubber plug portion formed by sealing the through hole from the outside of the battery case,
An outer sealing member that is airtight and annularly fixed to an annular hole surrounding portion surrounding the through hole in the battery case while covering the inner sealing member from the outside,
When a hermetically sealed space formed between the battery case, the inner sealing member and the outer sealing member is a sealed space,
The gas in the space, which is a gas existing in the sealed space,
When leaking out of the battery from the sealed space, including a detectable gas that can be detected separately from gas components in the atmosphere,
The detectable gas have a gas supply member for supplying to the sealing space,
Of the battery case, a portion facing the sealing space is a first space portion,
Of the inner sealing member, a portion facing the sealing space is a second space portion,
Of the outer sealing member, when the portion facing the sealing space is a third space portion,
The gas supplier is
A battery formed on at least one of the first living space portion, the second living space portion, and the third living space portion . 自身の内外を連通する貫通孔を有する電池ケースと、
前記電池ケース内に収容された電極体と、
ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、
前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、
前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、
前記封止空間内に存在する気体である空間内気体は、
前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、
前記封止空間へ前記検知可能気体を供給する気体供給体を有し、
前記内側封止部材の前記ゴム栓部のうち、少なくとも、前記封止空間に臨む部位である臨空間部自身が、前記気体供給体を兼ねる
電池。 A battery case having a through-hole communicating with the inside and outside of itself;
An electrode body housed in the battery case;
An inner sealing member comprising a rubber-like elastic body, and having a rubber plug portion formed by sealing the through hole from the outside of the battery case,
An outer sealing member that is airtight and annularly fixed to an annular hole surrounding portion surrounding the through hole in the battery case while covering the inner sealing member from the outside,
When a hermetically sealed space formed between the battery case, the inner sealing member and the outer sealing member is a sealed space,
The gas in the space, which is a gas existing in the sealed space,
When leaking out of the battery from the sealed space, including a detectable gas that can be detected separately from gas components in the atmosphere,
The detectable gas have a gas supply member for supplying to the sealing space,
The battery , of the rubber plug portion of the inner sealing member, at least the living space portion that is the portion facing the sealing space also serves as the gas supply body . 自身の内外を連通する貫通孔を有する電池ケースと、
前記電池ケース内に収容された電極体と、
ゴム状弾性体からなり、前記貫通孔を前記電池ケースの外部から気密に封止してなるゴム栓部を有する内側封止部材と、
前記内側封止部材を前記外部から覆いつつ、前記電池ケースのうち前記貫通孔を囲む環状の孔周囲部に気密かつ環状に固着してなる外側封止部材と、を備え、
前記電池ケースと前記内側封止部材と前記外側封止部材との間に形成された気密に封止された空間を、封止空間としたとき、
前記封止空間内に存在する気体である空間内気体は、
前記封止空間から電池外部に漏出したときに、大気中の気体成分と区別して検知可能な検知可能気体を含み、
前記封止空間へ前記検知可能気体を供給する気体供給体を有する
電池の製造方法であって、
前記電池ケースの前記貫通孔を、前記外部から前記内側封止部材の前記ゴム栓部で塞いで、前記貫通孔を気密に封止する第１封止工程と、
前記第１封止工程の後、前記内側封止部材を前記外部から覆いつつ、前記外側封止部材を前記電池ケースの前記孔周囲部に気密かつ環状に固着し、前記封止空間を形成する第２封止工程と、
少なくとも前記第２封止工程よりも前に、前記電池ケースのうち、前記封止空間を臨む部位である第１臨空間部、前記内側封止部材のうち、前記封止空間を臨む部位である第２臨空間部、及び、前記外側封止部材のうち、前記封止空間を臨む部位である第３臨空間部の少なくともいずれかの上に、前記気体供給体を配置する供給体配置工程、または、
前記第１封止工程よりも前に、前記内側封止部材の前記ゴム栓部のうち、少なくとも、前記封止空間に臨む部位である臨空間部自身を前記気体供給体とする供給体形成工程と、を備える
電池の製造方法。 A battery case having a through-hole communicating with the inside and outside of itself;
An electrode body housed in the battery case;
An inner sealing member comprising a rubber-like elastic body, and having a rubber plug portion formed by sealing the through hole from the outside of the battery case,
An outer sealing member that is airtight and annularly fixed to an annular hole surrounding portion surrounding the through hole in the battery case while covering the inner sealing member from the outside,
When a hermetically sealed space formed between the battery case, the inner sealing member and the outer sealing member is a sealed space,
The gas in the space, which is a gas existing in the sealed space,
When leaking out of the battery from the sealed space, including a detectable gas that can be detected separately from gas components in the atmosphere,
A method of manufacturing a battery having a gas supply for supplying the detectable gas to the sealed space,
A first sealing step of sealing the through hole airtightly by closing the through hole of the battery case from the outside with the rubber plug portion of the inner sealing member;
After the first sealing step, the outer sealing member is airtightly and annularly fixed around the hole of the battery case while covering the inner sealing member from the outside to form the sealing space. A second sealing step;
Prior to at least the second sealing step, the battery case is a first facing space portion that faces the sealing space, and the inner sealing member that faces the sealing space. The supply body arrangement | positioning process which arrange | positions the said gas supply body on at least any one of the 2nd last space part and the 3rd last space part which is a site | part which faces the said sealing space among the said outer side sealing members, Or
Prior to the first sealing step , among the rubber plug portions of the inner sealing member, at least a supply body forming step in which the near-space portion itself that is a portion facing the sealing space is the gas supply body. A method for manufacturing a battery comprising: 請求項３に記載の電池の製造方法であって、
前記第２封止工程の後、前記検知可能気体が前記封止空間から電池外部に漏れ出るか否かを検査することにより、前記外側封止部材と前記電池ケースの前記孔周囲部との間の気密性を検査する気密検査工程を更に備える
電池の製造方法。 A method of manufacturing a battery according to claim 3 ,
After the second sealing step, by inspecting whether the detectable gas leaks from the sealing space to the outside of the battery, between the outer sealing member and the hole peripheral portion of the battery case A method for manufacturing a battery, further comprising an airtight inspection step for inspecting airtightness of the battery. 請求項３または請求項４に記載の電池の製造方法であって、
前記第１封止工程は、減圧下で行い、
前記第２封止工程は、大気圧下で行う
電池の製造方法。 A method of manufacturing a battery according to claim 3 or claim 4 ,
The first sealing step is performed under reduced pressure,
The second sealing step is a battery manufacturing method performed under atmospheric pressure.
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