JP2007265658A - Electric storage element module - Google Patents

Electric storage element module Download PDF

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JP2007265658A
JP2007265658A JP2006085753A JP2006085753A JP2007265658A JP 2007265658 A JP2007265658 A JP 2007265658A JP 2006085753 A JP2006085753 A JP 2006085753A JP 2006085753 A JP2006085753 A JP 2006085753A JP 2007265658 A JP2007265658 A JP 2007265658A
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storage element
power storage
secondary battery
lithium secondary
element module
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JP5098197B2 (en
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Atsushi Fukaya
淳 深谷
Shinji Tsutsumi
慎二 堤
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Denso Corp
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Denso 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric storage element module which is high in safety and can detect an operation state of a pressure release mechanism by way of a simple structure with a high degree of reliability. <P>SOLUTION: An electric storage element module 8 is composed of a plurality of electrically connected electric storage elements 1. The electric storage elements 1 has an electrode 10, and an electric storage element case 14 which includes a pressure release mechanism 2 for releasing when an inner pressure becomes more than a predetermined pressure. The electric storage element module 8 has: an electric element 90 which is mounted on a place where an exhaust substance from the pressure release mechanism 2 can be brought into contact when the inner pressure of the electric storage element case 14 becomes more than the predetermined pressure, and which changes its electrical property when the exhaust substance is brought into contact to it; and a detector 7 which detects change in the electrical property of the electric element. The electric storage element module 8 can detects the exhaust substance such as an electrolyte sprayed according to the operation of the pressure release mechanism 2 of the electric storage elements 1. The operation state of the pressure release mechanism 2 can be detected by the simple structure with a high degree of reliability. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電池内部の圧力上昇に伴い、筐体の破裂を抑止するために作動する安全弁の作動状態を簡易な構造で信頼性良く検知することができる蓄電素子モジュールに関する。   The present invention relates to a power storage element module that can detect an operating state of a safety valve that operates to suppress bursting of a housing with a rise in pressure inside a battery with a simple structure and with high reliability.

近年、ノート型コンピュータ、小型携帯機器、自動車等に用いられるクリーンなエネルルギー源として高性能二次電池の開発が盛んである。ここで用いられる二次電池には、小型軽量でありながら大容量・高出カであること、即ち高エネルギー密度・高出力密度であることが求められている。高エネルギー密度・高出力密度を達成できる二次電池としては、リチウムイオン電池等の非水電解液二次電池が有力視されている。これら二次電池は、要求される出力、電力に応じ複数の単電池を直列及び並列に接続し、電池モジュールを構成している。   In recent years, high-performance secondary batteries have been actively developed as clean energy sources used in notebook computers, small portable devices, automobiles, and the like. The secondary battery used here is required to have a large capacity and a high output while being small and light, that is, a high energy density and a high output density. As secondary batteries that can achieve high energy density and high output density, non-aqueous electrolyte secondary batteries such as lithium ion batteries are considered promising. These secondary batteries configure a battery module by connecting a plurality of single cells in series and in parallel according to required output and electric power.

リチウムイオン電池等の非水電解液二次電池は、過充電や内部短絡等の異常時には、電解液の分解ガスが発生する。分解ガスが発生すると、電池の内圧が上昇する。電池の内圧の上昇による電池の破裂を抑えるため、一定以上の圧力となった場合に電池内圧を開放する安全弁が設けられている。異常により内圧が上昇した時には、安全弁が作動し電池内圧を開放するが、その際、電池の内部に存在する可燃性の電解液及び電解液分解ガスが飛散する。電池の安全弁から飛散した可燃性の電解液及び電解液分解ガスによる火災、爆発、人体への影響が懸念されるため、安全弁の作動状況を検知し、早期に電池の充放電を停止する必要があった。   In a non-aqueous electrolyte secondary battery such as a lithium ion battery, a decomposition gas of the electrolyte is generated when an abnormality such as overcharge or internal short circuit occurs. When cracked gas is generated, the internal pressure of the battery increases. In order to prevent the battery from bursting due to an increase in the internal pressure of the battery, a safety valve is provided to release the internal pressure of the battery when the pressure exceeds a certain level. When the internal pressure rises due to an abnormality, the safety valve operates to release the battery internal pressure. At that time, the flammable electrolyte solution and the electrolyte decomposition gas scattered inside the battery are scattered. Since there is concern about fire, explosion, and human body effects caused by flammable electrolyte and electrolyte decomposition gas scattered from the safety valve of the battery, it is necessary to detect the operating status of the safety valve and stop charging / discharging of the battery early. there were.

このような問題に対して、複数の単電池を直列及び並列に接続し構成される電池モジュールでは、安全弁の作動を直接的に検知する手段が特許文献１に開示されている。   With respect to such a problem, Patent Document 1 discloses means for directly detecting the operation of a safety valve in a battery module configured by connecting a plurality of single cells in series and in parallel.

特許文献１には、安全弁の破断する部分に一体的に設けられ、安全弁の破断に伴い断線する導線の導通状態を検知することにより、安全弁の作動状態を検知する検知装置が開示されている。   Patent Document 1 discloses a detection device that detects an operating state of a safety valve by detecting a conduction state of a conducting wire that is integrally provided at a portion where the safety valve is broken and is disconnected when the safety valve is broken.

また、安全弁の作動を間接的に検知する手段が特許文献２〜３に開示されている。   Further, Patent Documents 2 to 3 disclose means for indirectly detecting the operation of the safety valve.

特許文献２には、電池温度を検出する電池センサーを、安全弁から排出されるガス温度を検出するセンサーに併用して、簡単な構造で、異常な使用状態で確実に電流遮断するパック電池が開示されている。   Patent Document 2 discloses a battery pack that uses a battery sensor that detects a battery temperature in combination with a sensor that detects a gas temperature discharged from a safety valve to reliably cut off current in an abnormal use state with a simple structure. Has been.

特許文献３には、相互に僅かな隙間を介して配設された２以上の導電性部材から構成され、安全弁近傍に配設された検出電極と安全弁を介して噴出する内容物により検出電極で発生する短絡を検出する蓄電素子が開示されている。   In Patent Document 3, a detection electrode is composed of two or more conductive members disposed with a slight gap between each other, and a detection electrode disposed in the vicinity of the safety valve and a content ejected through the safety valve. A power storage element that detects a short circuit is disclosed.

しかしながら、特許文献１に開示された検知装置では、安全弁の破断する部分に一体的に設けられた導体の導通状態を検知することにより、安全弁の作動状態を検知するものであるが、各単電池の安全弁上に導体を配置しなけらばならず、単電池の数の増加に伴い配線等の構造が複雑になるといった問題を有していた。   However, in the detection device disclosed in Patent Document 1, the operating state of the safety valve is detected by detecting the conduction state of a conductor integrally provided in a portion where the safety valve is broken. There is a problem in that a conductor must be arranged on the safety valve of this type, and the structure of wiring and the like becomes complicated as the number of single cells increases.

また、特許文献２に開示されたパック電池では、安全弁上に設置されたの温度センサにて、安全弁の作動に伴い飛散するガスの温度を検出することにより、安全弁の作動状態を検知するものであるが、開弁初期に安全弁から飛散するガスの温度は、通常使用時の電池温度との判別が困難であり、安全弁作動状況の検知の信頼性に欠けるという問題を有していた。   Moreover, in the battery pack disclosed in Patent Document 2, the temperature sensor installed on the safety valve detects the temperature of the gas scattered with the operation of the safety valve, thereby detecting the operating state of the safety valve. However, there is a problem that the temperature of the gas scattered from the safety valve at the initial stage of opening the valve is difficult to distinguish from the battery temperature during normal use, and the reliability of the detection of the safety valve operating state is lacking.

さらに、特許文献３に開示された蓄電素子では、２以上の導電性部材から構成される電極問に安全弁の作動に伴い飛散する内容物の短絡により、安全弁の作動状態を検知するものであるため、電極間の結露による短絡で誤作動が懸念される。また、短絡検出の手段として、短絡を検出する電極間に並列に電圧が印加された抵抗素子を接続し、その低抗素子の端子電圧を監視することが例示されているが、この構成では電極である導電性部材間に電位差が印加されるため、マイグレーションによる短絡に伴う誤作動も懸念される。このように、特許文献３に開示された蓄電素子でも、安全弁作動状況の検知信頼性に欠けるという問題を有していた。
特開２００５−３２２４７１号公報 特開平１１−２５９３８号公報 特開２００５−１９７２７９号公報 Furthermore, in the electric storage element disclosed in Patent Document 3, the operating state of the safety valve is detected by a short circuit of the contents scattered with the operation of the safety valve on the electrode composed of two or more conductive members. There is a concern about malfunction due to a short circuit caused by condensation between the electrodes. Further, as a means for detecting a short circuit, it is exemplified that a resistance element to which a voltage is applied is connected in parallel between electrodes for detecting a short circuit, and the terminal voltage of the low resistance element is monitored. Since a potential difference is applied between the conductive members, there is a concern about malfunction due to a short circuit due to migration. As described above, the power storage element disclosed in Patent Document 3 also has a problem that the detection reliability of the safety valve operating state is lacking.
JP 2005-322471 A JP 11-25938 A JP 2005-197279 A

本発明は、上記実状に鑑みてなされたものであり、安全弁などの圧力解放機構の作動状況を簡易な構造で信頼性良く検知することで安全性の高い蓄電素子モジュールを提供することを課題とする。   The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a highly safe power storage element module by detecting the operating state of a pressure release mechanism such as a safety valve with a simple structure with high reliability. To do.

上記課題を解決するために本発明者らは検討を重ねた結果、本発明をなすに至った。   In order to solve the above-mentioned problems, the present inventors have made studies, and as a result, have come to make the present invention.

本発明の蓄電素子モジュールは、電極体を電解液とともに内部に密封しかつ内部の圧力が所定の圧力以上となったときに開放して内部の圧力を低下する圧力開放機構を備えた蓄電素子容器を有する蓄電素子の複数個が電気的に接続された蓄電素子モジュールにおいて、蓄電素子容器内の圧力が所定の圧力以上となったときに圧力解放機構から排出される排出物が当接可能な位置にもうけられ、排出物と当接したときに電気的な特性が変化する電気素子と、電気素子の電気的な特性の変化を検出する検出装置と、を有することを特徴とする。   An electricity storage device module according to the present invention is an electricity storage device container provided with a pressure release mechanism that seals an electrode body together with an electrolyte and opens when the internal pressure becomes a predetermined pressure or higher to reduce the internal pressure. In a power storage device module in which a plurality of power storage devices having electrical characteristics are electrically connected, a position at which discharged matter discharged from the pressure release mechanism can contact when the pressure in the power storage device container becomes equal to or higher than a predetermined pressure And an electrical element whose electrical characteristics change when it comes into contact with the discharged substance, and a detection device that detects a change in electrical characteristics of the electrical element.

この構成とすることで、蓄電素子モジュールを構成する蓄電素子の圧力開放機構の作動に伴い飛散する電解液などの排出物を検知でき、簡易な構造で信頼性良く圧力開放機構の作動状況を検知することが可能となった。   By adopting this configuration, it is possible to detect the discharge of electrolyte etc. that scatters with the operation of the pressure release mechanism of the storage element that constitutes the storage element module, and the operation status of the pressure release mechanism can be detected reliably with a simple structure. It became possible to do.

本発明の請求項２に記載の蓄電素子モジュールは、請求項１に記載の構成に加え、電気素子は、導電性高分子よりなり排出物が接触する略線状の線状部材を有し、検出手段は、線状部材の電気抵抗の変化を検出することを特徴としている。電気素子が導電性高分子よりなる線状部材よりなることで、排出物と接触したときに線状部材が溶解あるいは溶解が進行して断線し、電気素子の電気抵抗が大きく変化する（上昇する）。抵抗が大きく変化することから、電気的な特性の変化を容易に検出できる。電気素子が導電性高分子よりなる線状部材よりなることで、特に、排出物が電解液よりなるときに電気抵抗の変化を検出できるようになる。   The electric storage element module according to claim 2 of the present invention, in addition to the configuration according to claim 1, the electric element has a substantially linear linear member made of a conductive polymer and in contact with the discharged matter, The detecting means detects a change in electrical resistance of the linear member. When the electric element is made of a linear member made of a conductive polymer, the linear member dissolves or dissolves when it comes into contact with the discharged matter, and breaks, and the electric resistance of the electric element greatly changes (increases). ). Since the resistance changes greatly, a change in electrical characteristics can be easily detected. Since the electric element is made of a linear member made of a conductive polymer, a change in electric resistance can be detected particularly when the discharged substance is made of an electrolytic solution.

本発明の請求項３に記載の蓄電素子モジュールは、請求項２に記載の構成に加え、導電性高分子は、ポリチオフェンであることを特徴としている。ポリチオフェンは、特に、非水電解液電池の電解液に溶解するため、排出物が非水電解液電池の電解液であるときには排出物が接触すると溶解して線状部材が断線し、電気的な特性の変化を容易に検出できる。   The electric storage element module according to claim 3 of the present invention is characterized in that, in addition to the configuration according to claim 2, the conductive polymer is polythiophene. In particular, polythiophene dissolves in the electrolyte of a non-aqueous electrolyte battery, so when the effluent is an electrolyte of a non-aqueous electrolyte battery, it dissolves when the effluent comes into contact and the linear member is disconnected, resulting in electrical Changes in characteristics can be easily detected.

本発明の請求項４に記載の蓄電素子モジュールは、請求項１に記載の構成に加え、電気素子は、ガスセンサの検出部であることを特徴としている。このような構成となることで、ガスセンサの検出部が排出物と接触したときに、通常は検出部の電気抵抗が大きく変化する（低下する）。抵抗が大きく変化することから、電気的な特性の変化を容易に検出できる。電気素子がガスセンサの検出部よりなることで、特に、排出物が電解液が分解してなるガス状の物質よりなるときに電気抵抗の変化を検出できるようになる。   The electric storage element module according to claim 4 of the present invention is characterized in that, in addition to the configuration according to claim 1, the electric element is a detection part of a gas sensor. With such a configuration, when the detection unit of the gas sensor comes into contact with the discharged matter, usually, the electrical resistance of the detection unit greatly changes (decreases). Since the resistance changes greatly, a change in electrical characteristics can be easily detected. Since the electric element is composed of the detection part of the gas sensor, it is possible to detect a change in electric resistance particularly when the discharged substance is made of a gaseous substance obtained by decomposing the electrolytic solution.

本発明の請求項５に記載の蓄電素子モジュールは、請求項４に記載の構成に加え、ガスセンサは、還元性ガスを検出する半導体ガスセンサであることを特徴としている。ガスセンサが半導体ガスセンサよりなることで、非水電解液電池の電解液が分解したときに発生するＨ2、ＣＨ4などの還元性ガスを検出できるため、特に、排出物が電解液の分解ガスよりなるときに電気抵抗の変化を検出できるようになる。 The electric storage element module according to claim 5 of the present invention is characterized in that, in addition to the configuration according to claim 4, the gas sensor is a semiconductor gas sensor for detecting a reducing gas. Since the gas sensor is a semiconductor gas sensor, it is possible to detect reducing gases such as H 2 and CH 4 generated when the electrolyte of the nonaqueous electrolyte battery is decomposed. It becomes possible to detect a change in electrical resistance.

本発明の請求項６に記載の蓄電素子モジュールは、請求項５に記載の構成に加え、ガスセンサの検出部は、ＳｎＯ2、ＺｎＯより選ばれる少なくとも一種よりなることを特徴とする。検出部がこれらの材質より構成されることで、排出物が電解液の分解ガスよりなるときに電気抵抗の変化を検出できるようになる。 The power storage device module according to claim 6 of the present invention is characterized in that, in addition to the configuration according to claim 5, the detection part of the gas sensor is made of at least one selected from SnO 2 and ZnO. By configuring the detection unit from these materials, it becomes possible to detect a change in electrical resistance when the discharged substance is made of a decomposition gas of the electrolytic solution.

本発明の請求項７に記載の蓄電素子モジュールは、請求項１に記載の構成に加え、電気素子は、複数の圧力解放機構からの排出物と当接することを特徴とする。つまり、ひとつの電気素子で複数の圧力解放機構の作動を検出でき、蓄電素子モジュールの圧力解放機構の動作を検知することができる。電気素子が複数の圧力解放機構からの排出物と当接する構成としては、圧力解放機構からの排出物を捕集する容器内や圧力解放機構からの排出物を排出するダクト内に電気素子を配置する構成とすることができる。   The electric storage element module according to claim 7 of the present invention is characterized in that, in addition to the configuration according to claim 1, the electric element abuts on discharges from a plurality of pressure release mechanisms. That is, the operation of a plurality of pressure release mechanisms can be detected with one electric element, and the operation of the pressure release mechanism of the power storage element module can be detected. The electrical element is placed in contact with the discharge from the multiple pressure release mechanisms in the container that collects the discharge from the pressure release mechanism or in the duct that discharges the discharge from the pressure release mechanism. It can be set as the structure to do.

本発明の請求項８に記載の蓄電素子モジュールは、請求項１に記載の構成に加え、蓄電素子は、リチウムイオン二次電池であることを特徴とする。本発明の蓄電素子モジュールを構成する蓄電素子は、電極体を電解液とともに蓄電素子容器内に収容した構成であればその種類が限定されるものではなく、リチウム電池、リチウムイオン二次電池、電気二重層キャパシタ、ポリマー電池、ラジカル電池等の非水電解液二次電池などにより構成することができる。そして、本発明の蓄電素子モジュールは、高エネルギー密度・高出力密度を達成できる二次電池のリチウムイオン二次電池であることが特に好ましい。   The power storage element module according to claim 8 of the present invention is characterized in that, in addition to the configuration according to claim 1, the power storage element is a lithium ion secondary battery. The type of the electricity storage device constituting the electricity storage device module of the present invention is not limited as long as the electrode body is housed in the electricity storage device container together with the electrolyte, and the lithium battery, lithium ion secondary battery, electric A non-aqueous electrolyte secondary battery such as a double layer capacitor, a polymer battery, or a radical battery can be used. And it is especially preferable that the electrical storage element module of this invention is a lithium ion secondary battery of the secondary battery which can achieve a high energy density and a high output density.

以下、本発明の蓄電素子モジュールの詳細について実施例を用いて説明する。本発明の蓄電素子モジュールの実施例としてリチウムイオン二次電池モジュールを用いて説明するが、本発明の蓄電素子モジュールは、このリチウムイオン二次電池モジュールに限定されるものではない。   Hereinafter, the details of the electricity storage device module of the present invention will be described using examples. The lithium ion secondary battery module will be described as an example of the power storage element module of the present invention, but the power storage element module of the present invention is not limited to this lithium ion secondary battery module.

（実施例１）
まず、従来公知の製造方法でリチウム二次電池１を製造した。まず、シート状の正極板１１および負極板１２を製造し、セパレータを介して積層した状態で長尺方向に渦巻状に巻回した。この巻回体をプレス成形等の方法で径方向に圧縮して扁平形状の巻回型電極体１０を製造した。そして、金属製の電池容器１４の一部を構成する蓋体１４０に一体に接合された電極端子６，６にこの巻回型電極体１０を接合し、電解液とともに電池容器１４の残りの部分を構成する槽状の電池容器本体１４１に収容し、当接部をレーザ溶接等の方法で気密的・液密的に接合した。このようにして、電池容器１４内に電極体１０と電解液とが封入されたリチウム二次電池１が製造された。なお、リチウム二次電池１は、直方体状の外周形状を有し、電池容器１４の上面に正極端子６０及び負極端子６１が突出している。また、リチウム二次電池１の電池容器１４の上面であって、一対の電極端子６０，６１の間には、電池容器１４内部の圧力が所定の圧力以上に上昇したときに開裂する安全弁２がもうけられている。 Example 1
First, the lithium secondary battery 1 was manufactured by a conventionally known manufacturing method. First, the sheet-like positive electrode plate 11 and the negative electrode plate 12 were manufactured, and wound in a spiral shape in the longitudinal direction in a state of being laminated via a separator. This wound body was compressed in the radial direction by a method such as press molding to produce a flat wound electrode body 10. And this winding type electrode body 10 is joined to the electrode terminals 6 and 6 integrally joined to the cover body 140 which comprises a part of metal battery case 14, and the remaining part of the battery case 14 with electrolyte solution The abutting portion was hermetically and liquid-tightly joined by a method such as laser welding. Thus, the lithium secondary battery 1 in which the electrode body 10 and the electrolytic solution were enclosed in the battery container 14 was manufactured. In addition, the lithium secondary battery 1 has a rectangular parallelepiped outer peripheral shape, and a positive electrode terminal 60 and a negative electrode terminal 61 protrude from the upper surface of the battery container 14. Further, on the upper surface of the battery case 14 of the lithium secondary battery 1 and between the pair of electrode terminals 60 and 61, there is a safety valve 2 that is cleaved when the pressure inside the battery case 14 rises above a predetermined pressure. It is already made.

そして、５個のリチウムイオン二次電池１を電気的に直列に接続した状態で、幅方向に並べ、幅方向の両端部にアルミニウム製の拘束プレート３，３を配置し、二枚の拘束プレート３，３を鉄製の拘束バンド４で拘束して５個の電池を一体化した。５個のリチウムイオン二次電池１のそれぞれの安全弁２は、幅方向にのびる直線上に並んだ。   Then, in a state where the five lithium ion secondary batteries 1 are electrically connected in series, they are arranged in the width direction, aluminum restraint plates 3 and 3 are arranged at both ends in the width direction, and two restraint plates 3 and 3 were restrained by an iron restraining band 4 to integrate five batteries. The safety valves 2 of the five lithium ion secondary batteries 1 are arranged on a straight line extending in the width direction.

そして、絶縁性をもつ樹脂（本実施例においてはポリプロピレン）よりなる帯状の固定台の両端部を一対の拘束プレート３，３に固定して配置した。固定台５０は、５個のリチウムイオン二次電池１のそれぞれの安全弁２に小間隔を隔てた位置で安全弁２に対向して配置され、固定台５０の安全弁２に対向した表面に導電性高分子（本実施例ではポリチオフェン）よりなる線状の検知素子９０を配置した。   Then, both ends of a band-shaped fixing base made of an insulating resin (polypropylene in this embodiment) are fixed to the pair of restraining plates 3 and 3. The fixed base 50 is disposed on each safety valve 2 of the five lithium ion secondary batteries 1 so as to face the safety valve 2 at a small interval, and the surface of the fixed base 50 facing the safety valve 2 is electrically conductive. A linear sensing element 90 made of a molecule (polythiophene in this embodiment) was arranged.

そして、検知素子９０を抵抗変化検知手段７に接続した。抵抗変化検知手段７は、検知素子９０（Ｒ2）と固定抵抗（Ｒ1）を直列に接続し直列回路を構築し、この直列回路間に一定電圧を印加し、固定抵抗（Ｒ1）を流れる電圧の変動を監視する手段とした。なお、本実施例の抵抗変化検知手段７は、検知素子９０の抵抗変化を検知する手段の一例であり、この形態のみに限定されるものではない。 The detecting element 90 was connected to the resistance change detecting means 7. The resistance change detecting means 7 connects the detecting element 90 (R 2 ) and the fixed resistor (R 1 ) in series to construct a series circuit, applies a constant voltage between the series circuits, and sets the fixed resistor (R 1 ). This is a means for monitoring fluctuations in the flowing voltage. In addition, the resistance change detection means 7 of a present Example is an example of a means to detect the resistance change of the detection element 90, and is not limited only to this form.

このようにして、本実施例のリチウム二次電池モジュール８が製造できた。本実施例のリチウム二次電池モジュール８を図１〜４に示した。なお、図１はリチウム二次電池１の構成を示し、図２及び３は本実施例のリチウム二次電池モジュール８を示し、図４は抵抗変化検知手段７の回路を示した図である。   In this way, the lithium secondary battery module 8 of this example could be manufactured. The lithium secondary battery module 8 of the present example is shown in FIGS. 1 shows the configuration of the lithium secondary battery 1, FIGS. 2 and 3 show the lithium secondary battery module 8 of this embodiment, and FIG. 4 shows a circuit of the resistance change detecting means 7.

（動作）
本実施例のリチウム二次電池モジュール８の動作を以下に説明する。 (Operation)
The operation of the lithium secondary battery module 8 of this embodiment will be described below.

本実施例のリチウム二次電池モジュール８は、５個のリチウム二次電池１が直列に接続されてなる電池モジュールであり、通常の電池モジュールと同様に充放電を行うことができる。   The lithium secondary battery module 8 of the present embodiment is a battery module in which five lithium secondary batteries 1 are connected in series, and can be charged and discharged in the same manner as a normal battery module.

そして、本実施例のリチウム二次電池モジュール８を構成するリチウム二次電池１のひとつにおいて過充電や内部短絡等の異常が発生し、電池容器内で電解液の分解ガスが発生する。電解液の分解ガスが発生すると、電池容器の内部の圧力が上昇し、所定の圧力以上となったときに安全弁２が開裂する。   Then, in one of the lithium secondary batteries 1 constituting the lithium secondary battery module 8 of the present embodiment, an abnormality such as overcharge or internal short circuit occurs, and a decomposition gas of the electrolyte is generated in the battery container. When the decomposition gas of the electrolytic solution is generated, the pressure inside the battery container increases, and the safety valve 2 is opened when the pressure exceeds a predetermined pressure.

安全弁２が開裂すると、安全弁２から電解液の分解ガスが電解液をともなって噴出する。安全弁２から噴出した電解液は、小間隔を隔てて対向した位置に配置された固定台５０および検知素子９０に吹き付けられ、当接（付着）する。検知素子９０に付着した電解液は、付着した部分において検知素子９０を構成するポリチオフェンを溶解する。検知素子９０は線状に形成されており、溶解により断線する。   When the safety valve 2 is cleaved, a decomposition gas of the electrolytic solution is ejected from the safety valve 2 together with the electrolytic solution. The electrolytic solution ejected from the safety valve 2 is sprayed to and abuts (attaches) to the fixed base 50 and the detection element 90 arranged at positions facing each other with a small interval. The electrolytic solution adhering to the sensing element 90 dissolves polythiophene constituting the sensing element 90 in the adhering portion. The detection element 90 is formed in a linear shape and is disconnected by melting.

線状の検知素子９０が断線すると、抵抗変化検知手段７中の固定抵抗（Ｒ1）を流れる電圧が大きく低下し、抵抗変化検知手段７はこの電圧の低下を検知する。 When the linear detection element 90 is disconnected, the voltage flowing through the fixed resistance (R 1 ) in the resistance change detecting means 7 is greatly reduced, and the resistance change detecting means 7 detects this voltage drop.

本実施例のリチウム二次電池モジュール８は、抵抗変化検知手段７が固定抵抗（Ｒ1）を流れる電圧の低下を検知したときに、安全弁２から吹き出した電解液が付着して検知素子９０が断線した判断でき、安全弁２が開裂したことが検知できる。 In the lithium secondary battery module 8 of the present embodiment, when the resistance change detecting means 7 detects a decrease in the voltage flowing through the fixed resistor (R 1 ), the electrolytic solution blown out from the safety valve 2 is attached and the detecting element 90 is The disconnection can be determined, and it can be detected that the safety valve 2 has been broken.

本実施例のリチウム二次電池モジュール８は、安全弁２の開裂を検知したら、警告を発したり、充放電を停止することができる。これにより、電池内部から飛散した電解液や分解ガスによる被害を最小限に抑えられるので、安全性の高い電池モジュールを提供することが可能となった。   The lithium secondary battery module 8 according to the present embodiment can issue a warning or stop charging / discharging when it detects the cleavage of the safety valve 2. As a result, it is possible to minimize the damage caused by the electrolytic solution and the decomposition gas scattered from the inside of the battery, and thus it is possible to provide a highly safe battery module.

（実施例２）
まず、実施例１と同様にして、リチウム二次電池１を製造し、一対のアルミニウム製の拘束プレート３，３と鉄製の拘束バンド４で拘束して５個のリチウム二次電池１を一体化した。 (Example 2)
First, in the same manner as in Example 1, a lithium secondary battery 1 is manufactured, and is bound by a pair of restraining plates 3 and 3 made of aluminum and a restraining band 4 made of iron, and five lithium secondary batteries 1 are integrated. did.

そして、樹脂等の絶縁部材（本実施例においてはポリプロピレン）で構成されたダクト部材５５をアルミ製の拘束プレート３に固定した。ダクト部材５５は、リチウム二次電池１の並んだ方向にのびる箱状を有し、その底面５５ａがリチウム二次電池１の上面と当接する。ダクト部材５５は、リチウム二次電池１の上面にもうけられた安全弁２に対応した位置に貫通孔５５０を有し、かつリチウム二次電池１の並んだ方向の一方の側面に内部のガスを排出する排出孔５５１が開口している。つまり、一体化した５個のリチウム二次電池１に固定されたダクト部材５５は、それぞれのリチウム二次電池１の安全弁２から噴出した電解液の分解ガスが貫通孔５５０から内部に流入し、流入した分解ガスを捕集し、排出孔５５１から排出する。   And the duct member 55 comprised with insulating members, such as resin (a polypropylene in a present Example), was fixed to the restraining plate 3 made from aluminum. The duct member 55 has a box shape extending in the direction in which the lithium secondary batteries 1 are arranged, and the bottom surface 55 a abuts the top surface of the lithium secondary battery 1. The duct member 55 has a through hole 550 at a position corresponding to the safety valve 2 provided on the upper surface of the lithium secondary battery 1, and discharges internal gas to one side surface in the direction in which the lithium secondary battery 1 is arranged. A discharge hole 551 is opened. That is, in the duct member 55 fixed to the integrated five lithium secondary batteries 1, the decomposition gas of the electrolyte sprayed from the safety valve 2 of each lithium secondary battery 1 flows into the inside from the through hole 550, The introduced decomposition gas is collected and discharged from the discharge hole 551.

そして、ダクト部材５５の内周面であって排出孔に対向した表面には、実施例１の時と同様な検知素子９０が配置されている。検知素子９０は、実施例１の時と同様に抵抗変化検知手段７に接続されている。   A detection element 90 similar to that in the first embodiment is disposed on the inner peripheral surface of the duct member 55 and the surface facing the discharge hole. The detection element 90 is connected to the resistance change detection means 7 as in the first embodiment.

このようにして、本実施例のリチウム二次電池モジュール８が製造できた。本実施例のリチウム二次電池モジュール８を図５〜７に示した。なお、図５は、本実施例のリチウム二次電池モジュール８を示した図であり、図６〜７はダクト部材５５の構成を示した図である。   In this way, the lithium secondary battery module 8 of this example could be manufactured. The lithium secondary battery module 8 of the present example is shown in FIGS. FIG. 5 is a diagram showing the lithium secondary battery module 8 of the present embodiment, and FIGS. 6 to 7 are diagrams showing the configuration of the duct member 55.

本実施例のリチウム電池モジュール８は、ダクト部材５５の貫通孔５５０と安全弁２とが連通する構成となっているため、安全弁２から飛散した電解液はダクト部材５５の内部にもうけられ検知素子９０に電解液が付着する。これにより、実施例１の時と同様に、安全弁２の開裂を検知できる。   Since the lithium battery module 8 of the present embodiment has a configuration in which the through hole 550 of the duct member 55 and the safety valve 2 communicate with each other, the electrolytic solution scattered from the safety valve 2 is provided inside the duct member 55 and is detected by the detection element 90. Electrolyte adheres to the surface. Thereby, similarly to the case of the first embodiment, the cleavage of the safety valve 2 can be detected.

本実施例のリチウム二次電池モジュール８は、ダクト部材５５が安全弁２から飛散した電解液を捕集することで、より電解液が検知素子９０に付着しやすくなっている。さらに、ダクト部材５５は、安全弁２から飛散した電解液の分解ガスも捕集することで、反応性や可燃性の高い分解ガスを捕集して安全に排出でき、リチウム二次電池モジュール８の安全性が向上した。   In the lithium secondary battery module 8 according to the present embodiment, the duct member 55 collects the electrolytic solution scattered from the safety valve 2, so that the electrolytic solution is more easily attached to the detection element 90. Further, the duct member 55 collects the decomposition gas of the electrolytic solution scattered from the safety valve 2, thereby collecting and safely discharging the decomposition gas having high reactivity and flammability. Improved safety.

（実施例３）
まず、実施例１と同様にして、リチウム二次電池１を製造し、一対のアルミニウム製の拘束プレート３，３と鉄製の拘束バンド４で拘束して５個のリチウム二次電池１を一体化した。 (Example 3)
First, in the same manner as in Example 1, a lithium secondary battery 1 is manufactured, and is bound by a pair of restraining plates 3 and 3 made of aluminum and a restraining band 4 made of iron, and five lithium secondary batteries 1 are integrated. did.

そして、絶縁性をもつ樹脂（本実施例においてはポリプロピレン）よりなる帯状の固定台の両端部を一対の拘束プレート３，３に固定して配置した。固定台５０は、５個のリチウムイオン二次電池１のそれぞれの安全弁２に小間隔を隔てた位置で安全弁２に対向して配置され、固定台５０の安全弁２に対向した表面に半導体ガスセンサの検知部９５（本実施例においてはＳｎＯ2よりなる）が位置するように半導体ガスセンサを配置した。 Then, both ends of a belt-like fixing base made of an insulating resin (polypropylene in this embodiment) are fixed to the pair of restraining plates 3 and 3. The fixed base 50 is arranged opposite to the safety valve 2 at a position spaced apart from each safety valve 2 of the five lithium ion secondary batteries 1, and the surface of the fixed base 50 facing the safety valve 2 is placed on the surface of the semiconductor gas sensor. The semiconductor gas sensor was arranged so that the detection unit 95 (made of SnO 2 in this embodiment) is located.

この半導体ガスセンサを抵抗変化検知手段７に接続した。抵抗変化検知手段７は、ガスセンサ１３の検知部９５（Ｒ2）と固定抵抗（Ｒ1）を直列に接続して直列回路を構築した。そして、直列回路間に一定電圧を印加し、固定抵抗（Ｒ1）を流れる電圧の変動を監視する手段とした。ここで、半導体ガスセンサは、センサとして使用される温度が高い（２００〜４００℃）ため、検知部９５を加熱するヒーターをもつ。このヒーター（固定抵抗（Ｒ3））も抵抗変化検知手段７に接続され、検知部９５（Ｒ2）と固定抵抗（Ｒ1）を直列に接続した直列回路と電気的に並列な状態で接続された回路を構築した。なお、本実施例の抵抗変化検知手段７は、検知部（Ｒ2）の抵抗変化を検知する手段の一例であり、この形態のみに限定されるものではない。 This semiconductor gas sensor was connected to the resistance change detecting means 7. Resistance change detecting means 7 constructed a series circuit by connection detection unit 95 of the gas sensor 13 (R 2) and a fixed resistor (R 1) in series. Then, a constant voltage is applied between the series circuits, and the variation of the voltage flowing through the fixed resistor (R 1 ) is monitored. Here, since the temperature used as a sensor is high (200-400 degreeC), a semiconductor gas sensor has a heater which heats the detection part 95. FIG. This heater (fixed resistance (R 3 )) is also connected to the resistance change detecting means 7, and is connected in an electrically parallel state with a series circuit in which the detection unit 95 (R 2 ) and the fixed resistance (R 1 ) are connected in series. Was built circuit. The resistance change detecting means 7 of this embodiment is an example of a means for detecting a resistance change in the detection unit (R 2), but is not limited only to this embodiment.

このようにして、本実施例のリチウム二次電池モジュール８が製造できた。本実施例のリチウム二次電池モジュール８を図８〜１０に示した。なお、図８及び９は、本実施例のリチウム二次電池モジュール８を示した図であり、図１０は抵抗変化検知手段７の回路を示した図である。   In this way, the lithium secondary battery module 8 of this example could be manufactured. The lithium secondary battery module 8 of the present example is shown in FIGS. 8 and 9 are diagrams showing the lithium secondary battery module 8 of the present embodiment, and FIG. 10 is a diagram showing a circuit of the resistance change detecting means 7.

（動作）
本実施例のリチウム二次電池モジュール８の動作を以下に説明する。 (Operation)
The operation of the lithium secondary battery module 8 of this embodiment will be described below.

本実施例のリチウム二次電池モジュール８は、５個のリチウム二次電池１が直列に接続されてなる電池モジュールであり、通常の電池モジュールと同様に充放電を行うことができる。   The lithium secondary battery module 8 of the present embodiment is a battery module in which five lithium secondary batteries 1 are connected in series, and can be charged and discharged in the same manner as a normal battery module.

そして、本実施例のリチウム二次電池モジュール８を構成するリチウム二次電池１のひとつにおいて過充電や内部短絡等の異常が発生し、電池容器内で電解液の分解ガスが発生する。分解ガスが発生すると、電池容器の内部の圧力が上昇し、所定の圧力以上となったときに安全弁２が開裂する。   Then, in one of the lithium secondary batteries 1 constituting the lithium secondary battery module 8 of the present embodiment, an abnormality such as overcharge or internal short circuit occurs, and a decomposition gas of the electrolyte is generated in the battery container. When cracked gas is generated, the internal pressure of the battery container increases, and the safety valve 2 is opened when the pressure exceeds a predetermined pressure.

安全弁２が開裂すると、安全弁２から電解液の分解ガスが噴出する。安全弁２から噴出した分解ガスは、小間隔を隔てて対向した位置に配置された固定台５０および検知部９５に吹き付けられ、当接（付着）する。分解ガスは還元性ガス（Ｈ2、ＣＨ4など）を含み、検知部９５に付着すると、検知部９５の電気抵抗が低下する。 When the safety valve 2 is cleaved, the decomposition gas of the electrolytic solution is ejected from the safety valve 2. The cracked gas ejected from the safety valve 2 is sprayed to and abuts (attaches) to the fixed base 50 and the detection unit 95 disposed at positions facing each other with a small interval. The cracked gas contains a reducing gas (H 2 , CH 4, etc.).

検知部９５の電気抵抗が低下すると、抵抗変化検知手段７中の固定抵抗（Ｒ1）を流れる電圧が大きく上昇する。本実施例において、抵抗変化検知手段７はこの電圧の上昇を検知する。 When the electrical resistance of the detection unit 95 decreases, the voltage flowing through the fixed resistance (R 1 ) in the resistance change detection means 7 increases greatly. In this embodiment, the resistance change detecting means 7 detects this voltage increase.

本実施例のリチウム二次電池モジュール８は、抵抗変化検知手段７が固定抵抗（Ｒ1）を流れる電圧の上昇を検知したときに、安全弁２から吹き出した分解ガスが検知部９５に付着した判断でき、安全弁２が開裂したことが検知できる。 In the lithium secondary battery module 8 of this embodiment, when the resistance change detecting means 7 detects an increase in the voltage flowing through the fixed resistance (R 1 ), it is determined that the decomposition gas blown out from the safety valve 2 has adhered to the detection unit 95. It is possible to detect that the safety valve 2 has been cleaved.

本実施例のリチウム二次電池モジュール８は、実施例１の時と同様に、安全弁２の開裂を検知したら、警告を発したり、充放電を停止することができる。これにより、電池内部から飛散した電解液や分解ガスによる被害を最小限に抑えられるので、安全性の高い電池モジュールを提供することが可能となる。   As in the case of the first embodiment, the lithium secondary battery module 8 of the present embodiment can issue a warning or stop charging and discharging when it detects the breakage of the safety valve 2. As a result, it is possible to minimize damage caused by the electrolytic solution and decomposition gas scattered from the inside of the battery, and thus it is possible to provide a highly safe battery module.

（実施例４）
まず、実施例３と同様にして、リチウム二次電池１を製造し、一対のアルミニウム製の拘束プレート３，３と鉄製の拘束バンド４で拘束して５個のリチウム二次電池１を一体化した。 Example 4
First, the lithium secondary battery 1 is manufactured in the same manner as in Example 3, and the five lithium secondary batteries 1 are integrated by being restrained by a pair of restraining plates 3 and 3 made of aluminum and a restraining band 4 made of iron. did.

そして、樹脂等の絶縁部材（本実施例においてはポリプロピレン）で構成されたダクト部材５５をアルミ製の拘束プレート３に固定した。ダクト部材５５は、リチウム二次電池１の並んだ方向にのびる箱状を有し、その底面５５ａがリチウム二次電池１の上面と当接する。ダクト部材５５は、リチウム二次電池１の上面にもうけられた安全弁２に対応した位置に貫通孔５５０を有し、かつリチウム二次電池１の並んだ方向の一方の側面に内部のガスを排出する排出孔５５１が開口している。つまり、一体化した５個のリチウム二次電池１に固定されたダクト部材５５は、それぞれのリチウム二次電池１の安全弁２から噴出した電解液の分解ガスが貫通孔５５０から内部に流入し、流入した分解ガスを捕集し、排出孔５５１から排出する。   And the duct member 55 comprised with insulating members, such as resin (a polypropylene in a present Example), was fixed to the restraining plate 3 made from aluminum. The duct member 55 has a box shape extending in the direction in which the lithium secondary batteries 1 are arranged, and the bottom surface 55 a abuts the top surface of the lithium secondary battery 1. The duct member 55 has a through hole 550 at a position corresponding to the safety valve 2 provided on the upper surface of the lithium secondary battery 1, and discharges internal gas to one side surface in the direction in which the lithium secondary battery 1 is arranged. A discharge hole 551 is opened. That is, in the duct member 55 fixed to the five integrated lithium secondary batteries 1, the decomposition gas of the electrolyte sprayed from the safety valve 2 of each lithium secondary battery 1 flows into the inside from the through hole 550, The introduced decomposition gas is collected and discharged from the discharge hole 551.

そして、ダクト部材５５の内周面であって貫通孔５５０に対向した表面には、実施例３の時と同様な検知部９５が配置されている。検知部９５は、実施例３の時と同様に抵抗変化検知手段７に接続されている。   Then, on the inner peripheral surface of the duct member 55 and the surface facing the through hole 550, the same detection unit 95 as that in the third embodiment is disposed. The detection unit 95 is connected to the resistance change detection means 7 as in the third embodiment.

このようにして、本実施例のリチウム二次電池モジュール８が製造できた。本実施例のリチウム二次電池モジュール８を図１１〜１２に示した。なお、図１１は、本実施例のリチウム二次電池モジュール８を示した図であり、図１２はダクト部材５５の構成を示した図である。   In this way, the lithium secondary battery module 8 of this example could be manufactured. A lithium secondary battery module 8 of this example is shown in FIGS. FIG. 11 is a view showing the lithium secondary battery module 8 of the present embodiment, and FIG. 12 is a view showing the configuration of the duct member 55.

本実施例のリチウム電池モジュール８は、ダクト部材５５の貫通孔５５０と安全弁２とが連通する構成となっているため、安全弁２から飛散した分解ガスはダクト部材５５の内部にもうけられた検知部９５に付着する。これにより、実施例３の時と同様に、安全弁２の開裂を検知できる。   The lithium battery module 8 of the present embodiment has a configuration in which the through-hole 550 of the duct member 55 and the safety valve 2 communicate with each other, so that the decomposition gas scattered from the safety valve 2 is provided inside the duct member 55. 95. Thereby, similarly to the case of the third embodiment, the cleavage of the safety valve 2 can be detected.

本実施例のリチウム二次電池モジュール８は、ダクト部材５５が安全弁２から吹き出した分解ガスを捕集することで、より分解ガスが検知部９５に付着しやすくなっている。さらに、ダクト部材５５は、安全弁２から飛散した分解ガスを捕集することで、反応性や可燃性の高い分解ガスを捕集して安全に排出でき、リチウム二次電池モジュール８の安全性が向上した。   In the lithium secondary battery module 8 of the present embodiment, the duct member 55 collects the decomposition gas blown out from the safety valve 2, so that the decomposition gas is more easily attached to the detection unit 95. Further, the duct member 55 collects the decomposed gas scattered from the safety valve 2, thereby collecting the reactive and flammable decomposed gas and discharging it safely, and the lithium secondary battery module 8 is safe. Improved.

実施例１のリチウム二次電池モジュールに用いられるリチウム二次電池の構成を示した図である。1 is a diagram showing a configuration of a lithium secondary battery used in a lithium secondary battery module of Example 1. FIG. 実施例１のリチウム二次電池モジュールの構成を示した図である。1 is a diagram showing a configuration of a lithium secondary battery module of Example 1. FIG. 実施例１のリチウム二次電池モジュールの構成を示した側面図である。1 is a side view showing a configuration of a lithium secondary battery module of Example 1. FIG. 実施例１のリチウム二次電池モジュールの抵抗変化検知手段の回路を示した図である。FIG. 3 is a diagram showing a circuit of resistance change detection means of the lithium secondary battery module of Example 1. 実施例２のリチウム二次電池モジュールの構成を示した図である。4 is a diagram showing a configuration of a lithium secondary battery module of Example 2. FIG. 実施例２のリチウム二次電池モジュールのダクト部材を示した図である。6 is a view showing a duct member of the lithium secondary battery module of Example 2. FIG. 実施例２のリチウム二次電池モジュールのダクト部材の構成を示した図である。FIG. 4 is a diagram illustrating a configuration of a duct member of a lithium secondary battery module according to Example 2. 実施例３のリチウム二次電池モジュールの構成を示した図である。6 is a diagram showing a configuration of a lithium secondary battery module of Example 3. FIG. 実施例３のリチウム二次電池モジュールの構成を示した側面図である。6 is a side view showing the configuration of a lithium secondary battery module of Example 3. FIG. 実施例３のリチウム二次電池モジュールの抵抗変化検知手段の回路を示した図である。It is the figure which showed the circuit of the resistance change detection means of the lithium secondary battery module of Example 3. FIG. 実施例４のリチウム二次電池モジュールの構成を示した図である。6 is a diagram showing a configuration of a lithium secondary battery module of Example 4. FIG. 実施例４のリチウム二次電池モジュールのダクト部材の構成を示した図である。6 is a diagram showing a configuration of a duct member of a lithium secondary battery module according to Example 4. FIG.

符号の説明Explanation of symbols

１：リチウム二次電池 １０：巻回型電極体
１１：正極板 １２：負極板
１４：電池容器 １４０：蓋体
１４１：容器本体
２：安全弁
３：拘束プレート
４：拘束バンド
５０：固定台 ５５：ダクト部材
５５０：貫通孔 ５５１：排出孔
６：電極端子 ６０：正極端子
６１：負極端子
７：抵抗変化検知手段
８：リチウム二次電池モジュール
９０：検知素子 ９５：検知部 1: Lithium secondary battery 10: Winding type electrode body 11: Positive electrode plate 12: Negative electrode plate 14: Battery container 140: Lid body 141: Container body 2: Safety valve 3: Restraint plate 4: Restraint band 50: Fixing base 55: Duct member 550: Through hole 551: Discharge hole 6: Electrode terminal 60: Positive electrode terminal 61: Negative electrode terminal 7: Resistance change detection means 8: Lithium secondary battery module 90: Detection element 95: Detection unit

Claims (8)

電極体を電解液とともに内部に密封しかつ内部の圧力が所定の圧力以上となったときに開放して該内部の圧力を低下する圧力開放機構を備えた蓄電素子容器を有する蓄電素子の複数個が電気的に接続された蓄電素子モジュールにおいて、
該蓄電素子容器内の圧力が所定の圧力以上となったときに該圧力解放機構から排出される排出物が当接可能な位置にもうけられ、該排出物と当接したときに電気的な特性が変化する電気素子と、該電気素子の電気的な特性の変化を検出する検出装置と、を有することを特徴とする蓄電素子モジュール。 A plurality of power storage elements having a power storage element container provided with a pressure release mechanism that seals the electrode body together with the electrolyte and opens when the internal pressure becomes a predetermined pressure or higher to reduce the internal pressure. Are electrically connected storage element modules,
When the pressure in the electric storage element container becomes equal to or higher than a predetermined pressure, the discharge material discharged from the pressure release mechanism is provided at a position where it can come into contact, and the electric characteristics when it comes into contact with the discharge material An electrical storage element module, comprising: an electrical element that changes, and a detection device that detects a change in electrical characteristics of the electrical element. 前記電気素子は、導電性高分子よりなり前記排出物が接触する略線状の線状部材を有し、前記検出手段は、該線状部材の電気抵抗の変化を検出する請求項１記載の蓄電素子モジュール。   The said electric element has a substantially linear linear member which the said discharge | emission contacts which consist of conductive polymers, and the said detection means detects the change of the electrical resistance of this linear member. Storage element module. 前記導電性高分子は、ポリチオフェンである請求項２記載の蓄電素子モジュール。   The power storage element module according to claim 2, wherein the conductive polymer is polythiophene. 前記電気素子は、ガスセンサの検出部である請求項１記載の蓄電素子モジュール。   The power storage element module according to claim 1, wherein the electric element is a detection unit of a gas sensor. 前記ガスセンサは、還元性ガスを検出する半導体ガスセンサである請求項４記載の蓄電素子モジュール。   The power storage element module according to claim 4, wherein the gas sensor is a semiconductor gas sensor that detects reducing gas. 前記ガスセンサの検出部は、ＳｎＯ2、ＺｎＯより選ばれる少なくとも一種よりなる請求項５記載の蓄電素子モジュール。 The electric storage element module according to claim 5, wherein the detection unit of the gas sensor is made of at least one selected from SnO 2 and ZnO. 前記電気素子は、複数の前記圧力解放機構からの前記排出物と当接する請求項１記載の蓄電素子モジュール。   The power storage element module according to claim 1, wherein the electrical element is in contact with the discharge from the plurality of pressure release mechanisms. 前記蓄電素子は、リチウムイオン二次電池である請求項１記載の蓄電素子モジュール。   The power storage element module according to claim 1, wherein the power storage element is a lithium ion secondary battery.
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JP7134554B2 (en) 2019-07-23 2022-09-12 エルジー エナジー ソリューション リミテッド VEHICLE BATTERY FIRE DETECTION DEVICE AND METHOD

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