JP4529949B2 - Inspection method of lead acid battery - Google Patents

Inspection method of lead acid battery Download PDF

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JP4529949B2
JP4529949B2 JP2006162281A JP2006162281A JP4529949B2 JP 4529949 B2 JP4529949 B2 JP 4529949B2 JP 2006162281 A JP2006162281 A JP 2006162281A JP 2006162281 A JP2006162281 A JP 2006162281A JP 4529949 B2 JP4529949 B2 JP 4529949B2
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battery case
lid
exhaust passage
gas
pressure
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JP2007335107A (en
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泰宏 手賀
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Resonac Corp
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Shin Kobe Electric Machinery Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Gas Exhaust Devices For Batteries (AREA)

Description

本発明は、鉛蓄電池の電槽のシール箇所の密閉性の検査と、電槽の蓋内に設けられる一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法に関するものである。   The present invention relates to an inspection method for a lead storage battery that performs a sealing inspection of a sealed portion of a battery case of a lead storage battery and an inspection as to whether or not a collective exhaust passage provided in the lid of the battery case is normal. is there.

複数のセル室内のガス圧を逃がすための排気通路を備えた鉛蓄電池として、電槽内の複数のセル室に対して共通に一括排気通路を設けたものがある。この種の鉛蓄電池は、特許文献１に示されているように、複数のセル室を内部に有する電槽本体及びこの電槽本体の上端に接合された蓋からなる電槽と、電槽の各セル室内に収容された発電要素とを備えていて、電槽の蓋内に複数のセル室に連通した一括排気通路が設けられている。また一括排気路内を外部に連通させる一対の排気孔が電槽の蓋に形成され、各セル室内の圧力が上昇した際に、各セル室のガスが一括排気通路と排気孔とを通して外部に排出されるようになっている。   Some lead-acid batteries having an exhaust passage for releasing gas pressure in a plurality of cell chambers are provided with a collective exhaust passage for a plurality of cell chambers in a battery case. As shown in Patent Document 1, this type of lead-acid battery includes a battery case comprising a battery case body having a plurality of cell chambers inside and a lid joined to the upper end of the battery case body, and A power generation element housed in each cell chamber is provided, and a collective exhaust passage communicating with the plurality of cell chambers is provided in the lid of the battery case. In addition, a pair of exhaust holes communicating with the outside of the collective exhaust passage is formed in the lid of the battery case, and when the pressure in each cell chamber rises, the gas in each cell chamber is exposed to the outside through the collective exhaust passage and the exhaust hole. It is supposed to be discharged.

この種の鉛蓄電池では、電池を組み立てた後に、電槽のシール箇所（電槽本体と蓋との接合部や電極端子が蓋を貫通する部分等）の密閉性（気密性及び液密性）が良好であるか否かを検査することが必要である。鉛蓄電池の電槽のシール箇所の密閉性を検査する方法としては、特許文献２に示されているように、電槽の蓋に設けられた孔から電槽内に検査ガスを圧入して、電槽のシール箇所から検査ガスの漏れがあるか否かをガスセンサにより検出する方法が知られている。この方法では、検査ガスとして、センサにより検出し得るものを用いる必要がある。特許文献２に示された方法では、検査ガスとして微量の水素を含むガスを用いている。
特開平８−２２８１５号公報 特開平５−２１０８９号公報 In this type of lead-acid battery, after assembling the battery, the sealing property (airtightness and liquid-tightness) of the sealing part of the battery case (the joint between the battery case body and the cover, the part where the electrode terminal penetrates the cover, etc.) It is necessary to check whether or not is good. As a method for inspecting the sealing property of the sealed portion of the battery case of the lead storage battery, as shown in Patent Document 2, a test gas is injected into the battery case from the hole provided in the lid of the battery case, A method is known in which a gas sensor detects whether or not there is a leakage of an inspection gas from a sealed portion of a battery case. In this method, it is necessary to use a test gas that can be detected by a sensor. In the method disclosed in Patent Document 2, a gas containing a trace amount of hydrogen is used as the inspection gas.
JP-A-8-22815 Japanese Patent Laid-Open No. 5-21089

従来の検査方法では、電槽のシール箇所から漏れるガスを収集するための装置を必要としたたため、検査に要する設備が複雑になるのを避けられなかった。また検査ガスとしてセンサにより検出し得る成分を含んだ特殊のガスを用いる必要があるため、検査装置が複雑になることと相俟って、検査に要するコストが高くなるという問題があった。   In the conventional inspection method, since an apparatus for collecting gas leaking from the sealing portion of the battery case is required, it is inevitable that the equipment required for the inspection becomes complicated. Further, since it is necessary to use a special gas containing a component that can be detected by a sensor as the inspection gas, there is a problem that the cost required for the inspection increases due to the complexity of the inspection apparatus.

また、電槽の蓋内に一括排気通路が設けられている鉛蓄電池では、一括排気通路が正常に機能するか否かを検査することが望ましいが、従来の検査方法では、一括排気通路が正常であるか否かの検査を行うことはできなかった。   In addition, in lead-acid batteries that have a collective exhaust passage in the battery case lid, it is desirable to inspect whether the collective exhaust passage functions normally, but in the conventional inspection method, the collective exhaust passage is normal. It was not possible to check whether or not.

本発明の目的は、電槽のシール箇所の密閉性の検査と、一括排気通路が正常であるか否かの検査とを低コストで行うことができるようにした鉛蓄電池の検査方法を提案することにある。   An object of the present invention is to propose a method for inspecting a lead-acid battery that can perform a hermeticity inspection of a sealing portion of a battery case and an inspection as to whether or not a collective exhaust passage is normal at a low cost. There is.

本発明は、横方向に並べて配置された複数のセル室を内部に有する電槽本体とこの電槽本体の上端に接合された蓋とからなる電槽と、電槽の各セル室内に収容された発電要素とを備え、複数のセル室に連通した一括排気通路が電槽の蓋内に設けられて、一括排気通路内を外部に連通させる排気孔が電槽の蓋に形成されている鉛蓄電池の電槽のシール箇所の密閉性の検査と、一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法に係わるものである。   The present invention includes a battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the horizontal direction and a lid joined to the upper end of the battery case body, and is accommodated in each cell room of the battery case. A lead exhaust air passage that is connected to a plurality of cell chambers and is provided in the lid of the battery case, and an exhaust hole that communicates the inside of the collective exhaust passage to the outside is formed in the lead of the battery case. The present invention relates to an inspection method for a lead storage battery that performs a sealing inspection of a sealing portion of a battery case of a storage battery and an inspection of whether or not a collective exhaust passage is normal.

本発明においては、電槽の蓋に、排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、電槽の蓋に設けられているガス充填口以外の孔をすべて閉鎖した状態で、電槽内に圧縮ガスを充填した後、電槽の蓋に設けられているすべての孔を閉鎖した状態に保って、電槽内のガス圧が低下するか否かを見ることにより電槽のシール箇所の密閉性を検査し、電槽内に圧縮ガスが充填されている状態で排気孔を開いたときの電槽内のガス圧の低下の状況から一括排気通路が正常であるか否かを検査する。   In the present invention, the lid of the battery case is provided with an openable hole other than the exhaust hole, and the openable hole is used as a gas filling port, other than the gas filling port provided in the battery case lid. Whether or not the gas pressure in the battery case decreases after filling all the holes in the battery case with all the holes closed and then keeping all the holes provided in the battery case lid closed By checking the airtightness of the battery case seal location, it is exhausted collectively from the state of gas pressure drop in the battery case when the exhaust hole is opened while the battery case is filled with compressed gas Inspect whether the passage is normal.

上記の方法によれば、電槽内に圧縮ガスを封入した状態で、電槽内の圧力が低下するか否かを見ることにより、電槽のシール箇所の密閉性（シール性）が良好であるか否かを判定することができる。即ち、電槽内に圧縮ガスを封入した状態で、一定の時間の間に電槽内の圧力の低下が見られないときに電槽のシール箇所の密閉性が良好であると判定することができ、電槽内に圧縮ガスを封入した状態で、一定時間の間に電槽内の圧力が低下したときに、電槽のシール箇所の密閉性に問題があると判定することができる。   According to the above method, the sealing performance of the sealing portion of the battery case (sealability) is good by checking whether the pressure in the battery case decreases in a state where the compressed gas is sealed in the battery case. It can be determined whether or not there is. In other words, it is possible to determine that the sealing performance of the sealing portion of the battery case is good when the pressure in the battery case is not reduced for a certain period of time with the compressed gas sealed in the battery case. It is possible to determine that there is a problem in the sealing property of the sealing portion of the battery case when the pressure in the battery case is lowered for a certain time in a state where the compressed gas is sealed in the battery case.

また電槽内に圧縮ガスを封入した状態で排気孔を開くと、一括排気通路の流路抵抗に応じて決まる時間的な変化率で電槽内の圧力が低下していく。一括排気通路内の流路抵抗は一括排気通路の機械的な構成により決まるため、排気孔を開いた際の電槽内の圧力の低下割合を見ることにより、電槽の蓋内の一括排気通路が正常に機能しているか否か（電槽が正常に組み立てられているか否か）を判定することができる。   Further, when the exhaust hole is opened in a state where the compressed gas is sealed in the battery case, the pressure in the battery case decreases at a temporal change rate determined according to the flow resistance of the collective exhaust passage. Since the flow resistance in the collective exhaust passage is determined by the mechanical configuration of the collective exhaust passage, the collective exhaust passage in the lid of the battery case can be determined by looking at the rate of pressure drop in the battery case when the exhaust hole is opened. Is functioning normally (whether the battery case is normally assembled).

電槽の蓋内に一括排気通路を備えた鉛蓄電池においては、複数のセル室の並設方向の一端側及び他端側で一括排気通路内を外部に連通させるように、一対の排気孔が電槽の蓋の一端及び他端にそれぞれ形成されることが多い。   In a lead storage battery having a collective exhaust passage in the lid of a battery case, a pair of exhaust holes are provided so that the inside of the collective exhaust passage communicates with the outside at one end side and the other end side in the direction in which the plurality of cell chambers are arranged side by side. It is often formed at one end and the other end of the lid of the battery case.

このような鉛蓄電池に本発明を適用する場合には、電槽の蓋に、排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、電槽の蓋に設けられたガス充填口以外の孔はすべて閉鎖した状態で、ガス充填口から電槽内に設定圧力まで圧縮ガスを充填した後一定の判定時間の間電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に電槽内のガス圧が低下するか否かを見ることにより電槽のシール箇所の密閉性を検査する密閉性検査過程を行う。   When the present invention is applied to such a lead storage battery, a hole that can be opened is provided in the lid of the battery case in addition to the exhaust hole, and the hole that can be opened is used as a gas filling port. All the holes other than the gas filling port provided in Fig. 1 are closed, and after filling the compressed gas up to the set pressure from the gas filling port to the set pressure, An airtightness inspection process is performed in which the airtightness of the sealed portion of the battery case is inspected by holding the hole in a closed state and checking whether or not the gas pressure in the battery case decreases during the determination time.

そして、この密閉性検査過程で電槽内のガス圧の低下が見られなかったときに、排気孔の一方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第１の排気通路検査過程を行い、この第１の排気通路検査過程で一括排気通路が正常であると判定されたときに、ガス充填口以外の孔をすべて閉鎖した状態で、ガス充填口から電槽内に設定圧力まで圧縮ガスを再充填した後、排気孔の他方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第２の排気通路検査過程を行う。   And when the gas pressure in the battery case is not reduced during this sealing test, only one of the exhaust holes is opened and all the other holes provided in the battery case lid are closed. The first exhaust passage inspection process is performed to check whether the collective exhaust passage is normal or not from the state of pressure drop in the battery case at the time, and the collective exhaust passage is normal in the first exhaust passage inspection process. When all the holes other than the gas filling port are closed, after the compressed gas is refilled from the gas filling port to the set pressure to the set pressure, only the other exhaust port is opened and the battery is opened. Second exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from the state of pressure drop in the battery case when all other holes provided in the lid of the tank are closed I do.

上記のように構成すると、一括排気通路のガス充填口付近から一方の排気孔に至る部分の排気機能と、ガス充填口付近から他方の排気孔に至る部分との排気機能とを個別に検査することができるため、一括排気通路全体の検査を的確に行うことができる。   When configured as described above, the exhaust function of the part extending from the vicinity of the gas filling port of the collective exhaust passage to one exhaust hole and the exhaust function of the part extending from the vicinity of the gas filling port to the other exhaust hole are individually inspected. Therefore, the entire exhaust passage can be accurately inspected.

上記の例では、第１の排気通路検査過程を行った後、電槽内に圧縮ガスを再充填してから第２の排気通路検査過程を行うようにしたが、第１の排気通路検査過程を電槽内のガス圧が未だ十分に高い状態で終了させて、引き続き第２の排気通路検査過程に移行させるようにしてもよい。   In the above example, after the first exhaust passage inspection process is performed, the second exhaust passage inspection process is performed after the compressed gas is refilled in the battery case, but the first exhaust passage inspection process is performed. May be terminated in a state where the gas pressure in the battery case is still sufficiently high, and the process may subsequently be shifted to the second exhaust passage inspection process.

即ち、電槽の蓋に設けられたガス充填口以外の孔はすべて閉鎖した状態で、ガス充填口から電槽内に設定圧力まで圧縮ガスを充填した後一定の判定時間の間電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に前記電槽内のガス圧が低下するか否かを見ることにより電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、密閉性検査過程で電槽内のガス圧の低下が見られなかったときに、排気孔の一方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態を一定時間維持してその間の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第１の排気通路検査過程と、排気孔の他方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第２の排気通路検査過程とを順次行うようにしてもよい。   That is, all the holes other than the gas filling port provided on the lid of the battery case are closed, and after the compressed gas is filled from the gas filling port to the set pressure in the battery case, the lid of the battery case is kept for a certain judgment time. All the holes provided in the battery case are kept closed, and the sealing performance of the sealing part of the battery case is inspected by checking whether or not the gas pressure in the battery case decreases during the determination time. Open the exhaust hole and open all the other holes on the lid of the battery case when a gas tightness inspection process is performed and no decrease in gas pressure is observed in the battery case. A first exhaust passage inspection process for inspecting whether the collective exhaust passage is normal or not based on the pressure drop in the battery case during a certain period of time during the closed state, and only opening the other exhaust hole , The pressure in the battery case when all other holes in the battery case lid are closed Bulk exhaust passage from the situation of reduction of may be sequentially performed and a second exhaust passage inspection process of inspecting whether normal.

本発明の他の好ましい態様では、一対の排気孔の一方をガス充填口とし、電槽の蓋に設けられた他の孔はすべて閉鎖した状態で電槽内に圧縮ガスを設定圧力まで充填した後、一定の判定時間の間電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、この密閉性検査過程で電槽のシール箇所の密閉性が良好であると判定されたときに、一対の排気孔の他方のみを開き、電槽に設けられている他の孔をすべて閉鎖した状態に保持したときの電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する排気通路検査過程を行う。   In another preferred embodiment of the present invention, one of the pair of exhaust holes is a gas filling port, and the other holes provided in the lid of the battery case are all closed, and the battery case is filled with the compressed gas to the set pressure. After that, by holding all the holes provided in the lid of the battery case closed for a certain judgment time, and by checking whether the gas pressure in the battery tank has dropped during the judgment time When the airtightness inspection process is performed to inspect the airtightness of the sealing part of the battery case, and it is determined in this airtightness inspection process that the airtightness of the sealing part of the battery case is good, only the other of the pair of exhaust holes Exhaust passage inspection process to check whether the collective exhaust passage is normal or not from the state of pressure drop in the battery case when all the other holes provided in the battery case are kept closed I do.

上記の方法によると、一対の排気孔のみを用いて検査を行うことができるため、電槽の蓋にガス充填口として用いることができる適当な孔が設けられていない場合でも、電槽のシール箇所の密閉性の検査と、一括排気通路が正常であるか否かの検査とを容易に行うことができる。またガス充填口として用いることができる適当な孔、例えば電解液の液面レベルを表示するインジケータ等の部品を取り付けるための部品取付用の孔が設けられている場合には、その孔に部品を取り付けた状態で電槽のシール箇所の密閉性の検査と、一括排気通路の検査とを行うことができる。   According to the above method, since the inspection can be performed using only a pair of exhaust holes, the battery case seal is provided even when the battery case lid is not provided with an appropriate hole that can be used as a gas filling port. It is possible to easily check the sealing performance of the location and check whether or not the collective exhaust passage is normal. In addition, when there is an appropriate hole that can be used as a gas filling port, for example, a hole for mounting a component for mounting a component such as an indicator that displays the liquid level of the electrolyte, the component is inserted into the hole. In the attached state, it is possible to inspect the sealing property of the sealing portion of the battery case and inspect the collective exhaust passage.

本発明の更に他の好ましい態様では、電槽の蓋に、排気孔以外に開放可能な孔を設けておいて、この開放可能な孔をガス充填口とし、電槽の蓋に設けられたガス充填口以外の孔はすべて閉鎖した状態で、ガス充填口から電槽内に設定圧力まで圧縮ガスを充填して、電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定する。   In yet another preferred embodiment of the present invention, a hole that can be opened is provided in the lid of the battery case in addition to the exhaust hole, and the gas that is provided in the lid of the battery case is formed by using the openable hole as a gas filling port. Fill all the holes except for the filling port with compressed gas from the gas filling port to the set pressure in the battery case until the pressure in the battery case reaches the set pressure. Measure the amount of gas released.

そして、電槽内の圧力が設定圧力に達した時に電槽内へのガスの供給を停止して電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定された判定値に達しているか否かにより一括排気通路が正常であるか否かを判定し、電槽内へのガスの充填量が判定値に達していて一括排気通路が正常であると判定されたときに、一定の判定時間の間電槽に設けられているすべての孔を閉鎖した状態に保持して、判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査する。   Then, when the pressure in the battery case reaches the set pressure, the gas supply to the battery case is measured while the supply of gas into the battery case is stopped and the pressure in the battery case reaches the set pressure. It is determined whether or not the collective exhaust passage is normal depending on whether or not the filling amount of the gas reaches the set judgment value, and the collective exhaust passage reaches the judgment value and the collective exhaust passage is When it was determined to be normal, all the holes provided in the battery case were kept closed for a certain determination time, and the gas pressure in the battery tank decreased during the determination time. Check the sealability of the battery case seal by checking whether or not.

電槽内のガス圧力をガス充填口側で測るものとすると、一括排気通路に異常がある場合（一括排気通路が途中で塞がれている場合）には、電槽内の圧力が設定圧力に達するまでの間に電槽内に充填されるガスの量が、一括排気通路に異常がない場合よりも少なくなる。従って、一括排気通路が正常である場合に電槽内の圧力が設定圧力に達するまでの間に電槽内に充填されるガスの量を、判定値として予め実験により求めておいて、電槽内の圧力が設定圧力に達するまでの間に電槽内に充填されたガスの量が判定値に達しているか否かを見ることにより、一括排気通路が正常であるか否かを容易に判定することができる。また、一括排気通路が正常であると判定されたときに、一定の判定時間の間電槽に設けられているすべての孔を閉鎖した状態に保持すると、電槽のシール箇所に異常（漏れ）がある場合には、ガス漏れにより電槽内の圧力が低下していくので、電槽内に所定の圧力までガスを充填した後判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査することができる。   Assuming that the gas pressure in the battery case is measured on the gas filling port side, if there is an abnormality in the collective exhaust passage (the collective exhaust passage is blocked in the middle), the pressure in the battery case will be the set pressure. The amount of gas filled in the battery case before reaching the value is smaller than when there is no abnormality in the collective exhaust passage. Therefore, when the collective exhaust passage is normal, the amount of gas filled in the battery case until the pressure in the battery case reaches the set pressure is obtained in advance as an evaluation value by experiment. Easily determine whether the collective exhaust passage is normal or not by checking whether the amount of gas filled in the battery case has reached the judgment value before the internal pressure reaches the set pressure can do. In addition, when it is determined that the collective exhaust passage is normal, if all the holes provided in the battery case are kept closed for a certain determination time, an abnormality (leakage) may occur in the sealing part of the battery case. If there is, the pressure in the battery case will decrease due to gas leakage, so whether or not the gas pressure in the battery case has decreased during the judgment time after filling the battery to the predetermined pressure with gas By checking the above, it is possible to inspect the sealing property of the sealing portion of the battery case.

本発明の更に他の好ましい態様では、一対の排気孔の一方をガス充填口とし、電槽の蓋に設けられている他の孔をすべて閉鎖した状態で、ガス充填口から電槽内に圧縮ガスを設定圧力まで充填して、電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定し、電槽内の圧力が設定圧力に達した時に電槽内へのガスの充填を停止して、電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定値に達しているか否かにより一括排気通路が正常であるか否かを判定する。   In still another preferred embodiment of the present invention, one of the pair of exhaust holes is used as a gas filling port, and the other hole provided in the lid of the battery case is closed, and the gas filling port is compressed into the battery case. When the gas is filled up to the set pressure, the amount of gas filled in the battery case is measured until the pressure in the battery case reaches the set pressure, and when the pressure in the battery case reaches the set pressure Depending on whether or not the gas filling amount measured until the pressure in the battery case reaches the set pressure after the filling of the gas in the battery case is stopped has reached the set value It is determined whether the collective exhaust passage is normal.

また電槽内へのガスの充填量が設定値に達していて一括排気通路が正常であると判定されたときに、次いで一定の判定時間の間電槽に設けられているすべての孔を閉鎖した状態に保持して、判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査する。   Also, when it is determined that the gas filling amount in the battery case has reached the set value and the collective exhaust passage is normal, then all the holes provided in the battery case are closed for a certain determination time. In this state, the sealing performance of the sealed portion of the battery case is inspected by checking whether the gas pressure in the battery case has decreased during the determination time.

上記の方法によっても、一対の排気孔を用いて、一括排気通路の異常の有無と、電槽のシール箇所の気密性の検査とを容易に行うことができる。   Also by the above method, it is possible to easily perform the presence / absence of abnormality in the collective exhaust passage and the airtightness inspection of the sealing portion of the battery case by using the pair of exhaust holes.

以上のように、本発明によれば、電槽内に圧縮ガスを充填した後、一定の判定時間の間電槽内の圧力を監視して、一定の判定時間の間に電槽内の圧力が低下するか否かを見ることにより電槽のシール箇所の密閉性が良好であるか否かを判定するようにしたので、特殊な成分の検査ガスを用いることなく電槽のシール箇所の気密性の検査を行うことができる。また電槽のシール箇所から漏れるガスを回収する装置を設けることなく密閉性の検査を行うことができるため、検査に要する設備を簡単にして、低コストで電槽のシール箇所の密閉性の検査を行うことができる。   As described above, according to the present invention, after filling the battery case with the compressed gas, the pressure in the battery case is monitored for a certain determination time, and the pressure in the battery case is determined during the certain determination time. It is determined whether the sealing property of the battery case is good or not by checking whether or not the gas is lowered. A sex test can be performed. In addition, since it is possible to inspect the sealing without providing a device for collecting gas leaking from the sealing part of the battery case, the equipment required for the inspection is simplified, and the sealing property of the sealing part of the battery case is checked at low cost. It can be performed.

また本発明によれば、電槽内に圧縮ガスを封入した状態で排気孔を開いたときの電槽内の圧力の低下から電槽の蓋内の一括排気通路が正常に機能しているか否かを判定するようにしたので、一括排気通路が正常であるか否かの検査を簡単に行うことができる。   Further, according to the present invention, whether or not the collective exhaust passage in the lid of the battery case is functioning normally due to a decrease in the pressure in the battery case when the exhaust hole is opened with the compressed gas sealed in the battery case. Therefore, it is possible to easily check whether the collective exhaust passage is normal.

以下図面を参照して本発明の好ましい実施形態を詳細に説明する。図１及び図２は本発明の一実施形態において検査の対象とする鉛蓄電池の構成を概略的に示したもので、図１は電槽の蓋の大部分を除いた状態での平面図、図２は電槽の蓋を閉じた状態での斜視図である。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 schematically show the configuration of a lead-acid battery to be inspected in one embodiment of the present invention, and FIG. 1 is a plan view in a state where most of the lid of the battery case is removed, FIG. 2 is a perspective view of the battery case with the lid closed.

これらの図において、１は矩形状の横断面形状を有して長手方向（横方向）に並ぶ複数の（図示の例では６個の）セル室１ａないし１ｆを内部に有する電槽本体、２は電槽本体の上端の開口部を閉じる蓋であり、電槽本体１と蓋２とにより電槽３が構成されている。各セル室内には、所定枚数の負極板及び正極板を間にセパレータを介在させて交互に積層してなる極板群と電解液とからなる発電要素が収容され、最端部に配置されたセル室１ａ及び１ｆ内にそれぞれ収容された発電要素からそれぞれ正極端子４及び負極端子５が上方に導出されている。   In these figures, reference numeral 1 denotes a battery case body having a plurality of (six in the illustrated example) cell chambers 1a to 1f arranged in the longitudinal direction (lateral direction) having a rectangular cross-sectional shape, 2 Is a lid for closing the opening at the upper end of the battery case body, and the battery case 3 is constituted by the battery case body 1 and the lid 2. Each cell chamber accommodates a power generation element composed of an electrode plate group and an electrolyte solution, each of which is formed by alternately laminating a predetermined number of negative electrode plates and positive electrode plates with separators interposed therebetween, and is disposed at the end. A positive electrode terminal 4 and a negative electrode terminal 5 are led upward from the power generation elements accommodated in the cell chambers 1a and 1f, respectively.

図示の蓋２は、電槽本体１の上端に気密及び液密に接合されて、セル室１ａないし１ｆの上端の開口部を閉じる蓋本体２０１と、蓋本体２０１の幅方向の一端側のほぼ半部に形成された凹部２０２の上端開口部を閉じる蓋板２０３とからなっており、蓋本体２０１の凹部２０２と蓋板２０３とにより排気室２０４が形成されている。   The illustrated lid 2 is airtight and liquid tightly joined to the upper end of the battery case main body 1, and closes the upper end of the cell chambers 1 a to 1 f, and the lid main body 201 is almost on one end side in the width direction. The cover plate 203 closes the upper end opening of the recess 202 formed in the half, and the exhaust chamber 204 is formed by the recess 202 of the cover body 201 and the cover plate 203.

排気室２０４内は、セル室１ａないし１ｆ相互間を仕切る仕切り壁に相応する位置に形成された隔壁２０５によりセル室１ａないし１ｆのそれぞれの上部に位置するセル対応排気室２０４ａないし２０４ｆに仕切られている。蓋本体２０１の幅方向の他端側に位置するセル対応排気室２０４ａないし２０４ｆのそれぞれの端部壁を貫通して、セル室１ａないし１ｆをそれぞれセル対応排気室２０４ａないし２０４ｆ内に連通させる排気孔２０６ａないし２０６ｆが形成され、セル対応排気室２０４ａないし２０４ｆの底部には、セル室１ａないし１ｆ内に連通する電解液環流孔２０７ａないし２０７ｆが形成されている。液化した電解液を環流孔２０７ａないし２０７ｆに導くため、各セル対応排気室の底部には各環流孔に向かって傾斜した傾斜面が形成されている。   The exhaust chamber 204 is partitioned into cell-corresponding exhaust chambers 204a to 204f located above the cell chambers 1a to 1f by partition walls 205 formed at positions corresponding to the partition walls that partition the cell chambers 1a to 1f. ing. Exhaust gas that passes through the respective end walls of the cell-corresponding exhaust chambers 204a to 204f located on the other end side in the width direction of the lid main body 201 and communicates the cell chambers 1a to 1f into the cell-corresponding exhaust chambers 204a to 204f, respectively. Holes 206a to 206f are formed, and electrolyte circulation holes 207a to 207f communicating with the cell chambers 1a to 1f are formed at the bottoms of the cell corresponding exhaust chambers 204a to 204f. In order to guide the liquefied electrolyte to the reflux holes 207a to 207f, an inclined surface that is inclined toward each of the reflux holes is formed at the bottom of each cell corresponding exhaust chamber.

セル対応排気室２０４ａないし２０４ｆ相互間を仕切る各隔壁２０５には切り欠き２０８が形成され、この切り欠き２０８を通して一連のセル対応排気室２０４ａないし２０４ｆが連通させられている。セル対応排気室２０４ａないし２０４ｆとこれらのセル対応排気室を連通させる切り欠き２０８とにより、一括排気通路が形成されている。   A notch 208 is formed in each partition wall 205 partitioning the cell corresponding exhaust chambers 204a to 204f, and a series of cell corresponding exhaust chambers 204a to 204f are communicated with each other through the notch 208. A collective exhaust passage is formed by the cell-corresponding exhaust chambers 204a to 204f and the notch 208 that communicates these cell-corresponding exhaust chambers.

セル室１ａないし１ｆの並設方向の一端側及び他端側で一括排気通路内を外部に連通させる一対の排気孔２１０及び２１１が蓋板２０３の長手方向（セル室の並設方向）の一端及び他端の側壁にそれぞれ形成されている。図示してないが、排気孔２１０及び２１１には電解液のミストが外部に流出するのを阻止するためのフィルタが取り付けられている。   A pair of exhaust holes 210 and 211 for communicating the inside of the collective exhaust passage to the outside at one end side and the other end side of the cell chambers 1a to 1f in the side-by-side direction are one end in the longitudinal direction of the cover plate 203 (cell chamber side-by-side direction). And the other end side wall. Although not shown, a filter for preventing the electrolyte mist from flowing out is attached to the exhaust holes 210 and 211.

実際には、排気孔２０６ａないし２０６ｆからそれぞれ排出されたガス中に含まれる電解液のミストの液化を促すための邪魔板や突起などがセル対応排気室２０４ａないし２０４ｆ内に設けられるが、これらの図示は省略されている。   Actually, baffle plates and protrusions for promoting liquefaction of the mist of the electrolyte contained in the gas discharged from the exhaust holes 206a to 206f are provided in the cell corresponding exhaust chambers 204a to 204f. The illustration is omitted.

正極端子４及び負極端子５は、電槽の蓋本体２０１の幅方向の他端側の上部壁を液密及び気密に貫通した状態で蓋の上部に導出されている。また電槽の蓋本体２０１には、一つのセル室（図示の例ではセル室１ｅ）内に連通した部品取付用の孔２１２が形成され、この孔２１２の内周には雌ネジが刻設されている。孔２１２は例えば、電解液の液面レベルを表示するインジケータを取り付けるために用いられる。   The positive electrode terminal 4 and the negative electrode terminal 5 are led out to the upper part of the lid in a state of penetrating the upper wall on the other end side in the width direction of the lid body 201 of the battery case in a liquid-tight and air-tight manner. The lid body 201 of the battery case is formed with a component mounting hole 212 communicating with one cell chamber (in the illustrated example, the cell chamber 1e), and a female screw is engraved on the inner periphery of the hole 212. Has been. The hole 212 is used, for example, to attach an indicator that displays the liquid level of the electrolytic solution.

上記の鉛蓄電池を組み立てた後、本発明に係わる検査方法を実施する。本発明の第１の実施形態では、孔２１２をガス充填口として用い、このガス充填口から電槽内に圧縮ガスを充填して、充填した圧縮ガスの漏れの有無から電槽のシール箇所の密閉性を検査する密閉性検査過程を行う。圧縮ガスとしては、通常は圧縮空気を用いる。   After assembling the above lead storage battery, the inspection method according to the present invention is carried out. In the first embodiment of the present invention, the hole 212 is used as a gas filling port, and a compressed gas is filled into the battery case from this gas filling port. Perform a sealing inspection process to check the sealing. As the compressed gas, compressed air is usually used.

この密閉性検査過程では、電槽３の蓋２の一端及び他端にそれぞれ設けられた排気孔２１０及び２１１を図示しない栓で気密に閉鎖した状態で、圧縮ガス供給源１０に一端が接続された圧縮ガス供給管１１の他端をバルブ１２とガス供給管１３とを通して部品取付用の孔（ガス充填口）２１２に気密に接続する。バルブ１２を閉じた状態で電槽内のガス圧力を計測し得るように、ガス供給管１３に圧力計１４を接続しておく。バルブ１２を開いて、圧縮ガス供給源１０から電槽３内に圧縮ガスＡを充填し、電槽内の圧力が一定値に達したところでバルブを閉じて電槽３内に圧縮ガスを封入する。一定の判定時間の間、電槽内に圧縮ガスを封入した状態を保持する。この間、ガス供給管１３に接続した圧力計により電槽３内の圧力を監視し、一定の判定時間の間電槽３内の圧力の低下が見られなかったときに電槽３のシール箇所の密閉性が良好であると判定する。また一定の判定時間の間に電槽３内の圧力の低下が見られた場合には、蓋２と電槽本体１との接合部、端子４，５の貫通部などの電槽のシール箇所のいずれかが不良であると判定する。   In this airtightness inspection process, one end is connected to the compressed gas supply source 10 in a state where the exhaust holes 210 and 211 provided respectively at one end and the other end of the lid 2 of the battery case 3 are hermetically closed with a plug (not shown). The other end of the compressed gas supply pipe 11 is hermetically connected to a component mounting hole (gas filling port) 212 through the valve 12 and the gas supply pipe 13. A pressure gauge 14 is connected to the gas supply pipe 13 so that the gas pressure in the battery case can be measured with the valve 12 closed. The valve 12 is opened, the compressed gas A is filled into the battery case 3 from the compressed gas supply source 10, the valve is closed when the pressure in the battery case reaches a certain value, and the compressed gas is sealed in the battery case 3. . The state in which the compressed gas is sealed in the battery case is maintained for a certain determination time. During this time, the pressure in the battery case 3 is monitored by a pressure gauge connected to the gas supply pipe 13, and when the pressure in the battery case 3 does not decrease for a certain determination time, It is determined that the airtightness is good. In addition, when a pressure drop in the battery case 3 is observed during a certain determination time, the battery case seals such as the junction between the lid 2 and the battery case body 1 and the through portions of the terminals 4 and 5 are used. Is determined to be defective.

上記の密閉性検査の結果、電槽のシール箇所の密閉性に問題があると判定されたときには、以後の検査は行わず、不良品として排除する。   If it is determined that there is a problem with the sealing property of the sealed portion of the battery case as a result of the above-described sealing property inspection, the subsequent inspection is not performed and the product is excluded as a defective product.

上記のようにして電槽の密閉性検査過程を行った結果、電槽のシール箇所の密閉性が良好であると判定された場合には、次に、一括排気通路が正常であるか否かの検査を行う検査過程を行う。   If it is determined that the sealing performance of the battery case is good as a result of performing the sealing test of the battery case as described above, next, whether or not the collective exhaust passage is normal Perform the inspection process to perform the inspection.

この検査過程では、先ず電槽３の蓋２の一端及び他端にそれぞれ設けられた排気孔２１０及び２１１を閉鎖した状態で、部品取付用の孔を通して電槽２内に圧縮ガスを充填した後、排気孔２１０及び２１１の一方を開き他方を閉鎖したままの状態にした際の電槽内の圧力の低下から一括排気通路が正常であるか否かを検査する第１の排気通路検査過程を行う。   In this inspection process, first, after the exhaust holes 210 and 211 provided respectively at one end and the other end of the lid 2 of the battery case 3 are closed, the battery case 2 is filled with compressed gas through the component mounting holes. A first exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from a decrease in pressure in the battery case when one of the exhaust holes 210 and 211 is opened and the other is kept closed. Do.

この第１の排気通路検査過程では、バルブ１２が閉じ、電槽３内に圧縮ガスが充填されている状態で、例えば排気孔２１１を閉じたままとし、排気孔２１０を開く。このとき一括排気通路の少なくとも孔２１２が設けられたセル室に対応するセル対応排気室２０４ｅから開かれた排気孔２１０に至る部分が正常に機能していれば、電槽内の圧力が低下していくため、この部分の排気通路が正常に機能していると判定することができる。電槽内の圧力は、一括排気通路の機械的な構成により決まる流路抵抗に応じて、所定の時間的な変化率で低下していくため、排気孔２１０を開いた際の電槽内の圧力の低下割合を見ることにより、電槽の蓋内の一括排気通路の上記の部分が正常に機能しているか否か（電槽が正常に組み立てられているか否か）を判定することができる。排気通路１１０を開いた際に電槽内のガス圧力が所定の割合で低下していかない場合には、以後の検査は行わずに不良品として排除する。   In this first exhaust passage inspection process, for example, the exhaust hole 211 is closed and the exhaust hole 210 is opened while the valve 12 is closed and the battery case 3 is filled with compressed gas. At this time, if the part extending from the cell corresponding exhaust chamber 204e corresponding to the cell chamber provided with at least the hole 212 of the collective exhaust passage to the exhaust hole 210 functioning normally functions, the pressure in the battery case decreases. Therefore, it can be determined that the exhaust passage of this part is functioning normally. Since the pressure in the battery case decreases at a predetermined rate of change according to the flow resistance determined by the mechanical configuration of the collective exhaust passage, the pressure in the battery case when the exhaust hole 210 is opened is reduced. By looking at the rate of decrease in pressure, it is possible to determine whether or not the above-mentioned portion of the collective exhaust passage in the lid of the battery case is functioning normally (whether or not the battery case is normally assembled). . If the gas pressure in the battery case does not decrease at a predetermined rate when the exhaust passage 110 is opened, it is eliminated as a defective product without performing the subsequent inspection.

上記第１の排気通路検査過程を行った結果、排気通路が正常であると判定されたときには、電槽３の蓋の一端及び他端にそれぞれ設けられた排気孔２１０を閉鎖した状態で、電槽３内に圧縮ガスを再度充填した後、排気孔２１０，２１１の一方を閉鎖したままの状態にして他方を開いた際の電槽３内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第２の排気通路検査過程を行う。   As a result of performing the first exhaust passage inspection process, when it is determined that the exhaust passage is normal, the exhaust holes 210 respectively provided at one end and the other end of the lid of the battery case 3 are closed, and the battery is closed. After filling the tank 3 again with the compressed gas, the collective exhaust passage is normal due to the pressure drop in the battery tank 3 when one of the exhaust holes 210 and 211 is closed and the other is opened. A second exhaust passage inspection process for inspecting whether or not there is present is performed.

この第２の排気通路検査過程では、バルブ１２を閉じ、排気孔２１０及び２１１を閉じた状態で、電槽３内に圧縮ガスを一定の圧力まで充填した後、第１の排気通路検査過程で開かなかった方の排気孔（今の例では排気孔２１１）を開き、他方の排気孔２１０を閉じたままとして、電槽内の圧力が低下していくか否かを見る。このとき一括排気通路の少なくとも孔２１２が設けられたセル室に対応するセル対応排気室２０４ｅから開かれた排気孔２１１に至る部分が正常に機能していれば、電槽３内の圧力が低下していくため、この部分の排気通路が正常に機能していると判定することができる。排気通路２１１を開いた際に電槽内のガス圧力が所定の割合で低下していかない場合（例えば、隔壁２０５に設けられた切り欠き２０８が詰まっている場合）には、一括排気通路が正常に機能していないため、不良品として排除する。   In the second exhaust passage inspection process, after the valve 12 is closed and the exhaust holes 210 and 211 are closed, the battery case 3 is filled with the compressed gas to a certain pressure, and then in the first exhaust passage inspection process. The other exhaust hole (exhaust hole 211 in this example) is opened and the other exhaust hole 210 is kept closed to see whether the pressure in the battery case decreases. At this time, if the part extending from the cell corresponding exhaust chamber 204e corresponding to the cell chamber provided with at least the hole 212 of the collective exhaust passage to the exhaust hole 211 functioning normally functions, the pressure in the battery case 3 decreases. Therefore, it can be determined that the exhaust passage of this portion is functioning normally. When the gas pressure in the battery case does not decrease at a predetermined rate when the exhaust passage 211 is opened (for example, when the notch 208 provided in the partition wall 205 is clogged), the collective exhaust passage is normal. Because it is not functioning, it is excluded as a defective product.

上記の実施形態では、第１の排気通路検査過程を行った後、電槽内にガスを再充填してから第２の排気通路検査過程を行うようにしたが、電槽内のガス圧が十分残っている段階で第１の排気通路検査過程を終了して、引き続き第２の排気通路検査過程に移行させるようにしてもよい。即ち、密閉性検査過程で電槽内のガス圧の低下が見られなかったときに、排気孔の一方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態を一定時間維持してその間の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第１の排気通路検査過程と、排気孔の他方のみを開き、電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する第２の排気通路検査過程とを順次行うようにしてもよい。   In the above embodiment, after the first exhaust passage inspection process is performed, the second exhaust passage inspection process is performed after the gas is refilled in the battery case. The first exhaust passage inspection process may be terminated when there is a sufficient remaining amount, and then the process may proceed to the second exhaust passage inspection process. That is, when the gas pressure inside the battery case is not reduced during the sealing test, only one of the exhaust holes is opened and all the other holes provided in the battery case lid are closed. A first exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from the state of pressure drop in the battery case while maintaining the time, and opening only the other of the exhaust holes, The second exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from the state of pressure drop in the battery case when all the other holes provided in the battery are closed are sequentially You may make it perform.

上記の実施形態では、第１の排気通路検査過程と、第２の排気通路検査過程とを行うようにしたが、電槽内に圧縮ガスを所定の圧力まで充填した状態で、排気孔２１０及び２１１を同時に開いた際の電槽内の圧力の低下の状況（圧力の時間的な変化）は、ガス充填口２１２が設けられているセル室に対応するセル室対応排気室２０４ｅから排気孔２１０に至る排気通路と、セル室対応排気室２０４ｅから排気孔２１１に至る排気通路の双方が正常な場合と、いずれか一方が異常である場合とで異なるので、第１及び第２の排気通路検査過程の双方を行うことなく、排気孔２１０及び２１１の双方を開いて排気通路検査過程を一度だけ行うようにしてもよい。   In the above embodiment, the first exhaust passage inspection process and the second exhaust passage inspection process are performed. However, in the state where the compressed gas is filled in the battery case to a predetermined pressure, the exhaust holes 210 and The situation of the pressure drop in the battery case when the 211 is opened at the same time (temporal change in pressure) is from the cell chamber corresponding exhaust chamber 204e corresponding to the cell chamber provided with the gas filling port 212 to the exhaust hole 210. The first and second exhaust passage inspections are different depending on whether the exhaust passage leading to the exhaust passage 211 and the exhaust passage leading from the cell chamber corresponding exhaust chamber 204e to the exhaust hole 211 are normal or abnormal. Without performing both of the processes, both the exhaust holes 210 and 211 may be opened and the exhaust passage inspection process may be performed only once.

即ち、電槽の蓋に設けられているガス充填口以外の孔をすべて閉鎖した状態で、電槽内に圧縮ガスを充填した後、電槽の蓋に設けられているすべての孔を閉鎖した状態に保って、電槽内のガス圧が低下するか否かを見ることにより電槽のシール箇所の密閉性を検査した後、電槽内に圧縮ガスが充填されている状態で排気孔２１０，２１１を同時に開いたときの電槽内のガス圧の低下の状況（ガス圧の時間的変化率）から一括排気通路が正常であるか否かを検査するようにしてもよい。   That is, with all the holes other than the gas filling port provided in the battery case lid closed, after filling the battery case with compressed gas, all the holes provided in the battery case lid were closed. After checking the sealing property of the sealing part of the battery case by checking whether or not the gas pressure in the battery case is lowered, the exhaust hole 210 is filled with the compressed gas in the battery case. , 211 may be inspected as to whether or not the collective exhaust passage is normal from the state of gas pressure drop in the battery case (time rate of change in gas pressure) when the two are opened simultaneously.

上記の各例では、電槽に部品を取り付けるために設けられている孔２１２をガス充填口として用いているが、図１及び図２に示された電池のように、電槽の蓋の両端に一対の排気孔２１０及び２１１が設けられている場合には、これらの排気孔をガス充填口として用いることにより、電槽の密閉性の検査と、一括排気通路の検査とを行うことができる。   In each of the above examples, the hole 212 provided for attaching the component to the battery case is used as a gas filling port. However, as in the battery shown in FIGS. 1 and 2, both ends of the lid of the battery case are used. When a pair of exhaust holes 210 and 211 are provided in the case, by using these exhaust holes as gas filling ports, it is possible to inspect the sealing property of the battery case and the collective exhaust passage. .

例えば、一対の排気孔２１０，２１１の一方をガス充填口とし、電槽の蓋２に設けられた他の孔はすべて閉鎖した状態で電槽内に圧縮ガスを設定圧力まで充填した後、一定の判定時間の間電槽の蓋２に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、密閉性検査過程で電槽のシール箇所の密閉性が良好であると判定されたときに、一対の排気孔の他方のみを開き、電槽に設けられている他の孔をすべて閉鎖した状態に保持したときの電槽内の圧力の低下の状況から一括排気通路が正常であるか否かを検査する排気通路検査過程を行うようにすることができる。   For example, one of the pair of exhaust holes 210 and 211 is used as a gas filling port, and the other holes provided in the lid 2 of the battery case are all closed, and the battery case is filled with the compressed gas up to the set pressure, and then constant. By keeping all the holes provided in the lid 2 of the battery case closed during the determination time, and checking whether or not the gas pressure in the battery case has decreased during the determination time When the airtightness inspection process is performed to inspect the airtightness of the sealing part, and it is determined that the airtightness of the sealing part of the battery case is good in the airtightness inspection process, only the other of the pair of exhaust holes is opened, The exhaust passage inspection process is performed to check whether the collective exhaust passage is normal or not based on the pressure drop in the battery case when all other holes provided in the battery case are kept closed. Can be.

上記の各実施形態では、排気孔を開いた際の電槽内のガス圧の低下から一括排気通路の検査を行うようにしたが、一括排気通路が正常な場合と、異常な場合（一部が詰まっている場合）とでは、電槽内に所定圧力までガスを充填した際のガスの充填量が異なるので、電槽内に圧縮ガスを供給する管路の途中に流量計を挿入しておいて、電槽内に所定圧力までガスを充填した際のガスの充填量から一括排気通路の検査を行うこともできる。   In each of the above embodiments, the collective exhaust passage is inspected from the decrease in gas pressure in the battery case when the exhaust hole is opened, but the collective exhaust passage is normal and abnormal (partly) When the gas tank is filled with gas up to the specified pressure, the gas filling amount is different, so insert a flow meter in the middle of the pipeline that supplies compressed gas to the battery tank. In this case, it is possible to inspect the collective exhaust passage from the amount of gas charged when the gas is filled to a predetermined pressure in the battery case.

即ち、電槽の蓋２に設けられた開放可能な孔２１２をガス充填口とし、電槽の蓋に設けられた孔のうち、このガス充填口以外の孔はすべて閉鎖した状態で、ガス充填口から電槽内に設定圧力まで圧縮ガスを充填して、電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定し、電槽内の圧力が設定圧力に達した時に電槽内へのガスの供給を停止して電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定値に達しているか否かにより一括排気通路が正常であるか否かを判定することができる。また電槽３内へのガスの充填量が設定値に達していて一括排気通路が正常であると判定されたときに、一定の判定時間の間電槽に設けられているすべての孔を閉鎖した状態に保持して、判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査することができる。   That is, the openable hole 212 provided in the lid 2 of the battery case is used as a gas filling port, and the holes other than the gas filling port among the holes provided in the lid of the battery case are closed, and the gas filling is performed. Compressed gas is charged to the set pressure from the mouth to the set pressure, and the amount of gas charged in the battery is measured until the pressure in the battery reaches the set pressure. When the gas reaches the set pressure, supply of gas into the battery case is stopped, and the amount of gas charged in the battery case measured until the pressure in the battery case reaches the set pressure becomes the set value. Whether or not the collective exhaust passage is normal can be determined based on whether or not it has been reached. Also, when it is determined that the gas filling amount in the battery case 3 has reached the set value and the collective exhaust passage is normal, all holes provided in the battery case are closed for a certain determination time. It is possible to inspect the sealing property of the sealing portion of the battery case by holding it in this state and checking whether the gas pressure in the battery case has decreased during the determination time.

また、一対の排気孔２１０，２１１の一方をガス充填口とし、電槽の蓋２に設けられている他の孔をすべて閉鎖した状態で、ガス充填口から電槽内に圧縮ガスを設定圧力まで充填して、電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定し、電槽内の圧力が設定圧力に達した時に電槽内へのガスの充填を停止して、電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定値に達しているか否かにより一括排気通路が正常であるか否かを判定することもできる。   In addition, one of the pair of exhaust holes 210 and 211 is used as a gas filling port, and the compressed gas is set from the gas filling port into the battery case with all other holes provided in the battery case lid 2 closed. Until the pressure in the battery case reaches the set pressure, measure the amount of gas charged in the battery case, and when the pressure in the battery case reaches the set pressure, enter the battery case. Depending on whether or not the gas filling amount measured until the pressure in the battery tank reaches the set pressure after reaching the set pressure, the collective exhaust passage is It can also be determined whether or not it is normal.

この場合も、電槽３内へのガスの充填量が設定値に達していて一括排気通路が正常であると判定されたときに、次いで一定の判定時間の間電槽に設けられているすべての孔を閉鎖した状態に保持して、判定時間の間に電槽内のガス圧が低下したか否かを見ることにより電槽のシール箇所の密閉性を検査することができる。   Also in this case, when it is determined that the gas filling amount in the battery case 3 has reached the set value and the collective exhaust passage is normal, all of the batteries provided in the battery case for a certain determination time are then provided. It is possible to check the sealing property of the sealed portion of the battery case by holding the hole in the closed state and checking whether the gas pressure in the battery case has decreased during the determination time.

本発明の一実施形態において検査の対象とする鉛蓄電池の構成を、電槽の蓋の大部分を除いた状態で概略的に示した平面図である。It is the top view which showed roughly the structure of the lead acid battery made into the test object in one Embodiment of this invention in the state except most of the lid | cover of the battery case. 図１に示した鉛蓄電池に本発明に係わる検査を実施する際の状態を概略的に示した斜視図である。It is the perspective view which showed schematically the state at the time of implementing the test | inspection concerning this invention to the lead acid battery shown in FIG.

符号の説明Explanation of symbols

１ 電槽本体
１ａ〜１ｆ セル室
２ 蓋
２０１ 蓋本体
２０２ 凹部
２０３ 蓋板
２０４ 排気室
２０４ａ〜２０４ｆ セル対応排気室
２１０，２１１ 排気孔
２１２ 開放可能な孔
３ 電槽
１０ 圧縮ガス供給源
DESCRIPTION OF SYMBOLS 1 Battery case main body 1a-1f Cell chamber 2 Lid 201 Lid main body 202 Recessed part 203 Cover plate 204 Exhaust chamber 204a-204f Cell corresponding | compatible exhaust chamber 210, 211 Exhaust hole 212 Openable hole 3 Battery case 10 Compressed gas supply source

Claims (6)

横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記電槽の蓋には、少なくとも前記一括排気通路内を外部に連通させる排気孔が形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記電槽の蓋に、前記排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、
前記電槽の蓋に設けられている前記ガス充填口以外の孔をすべて閉鎖した状態で、前記電槽内に圧縮ガスを充填した後、前記電槽の蓋に設けられているすべての孔を閉鎖した状態に保って、前記電槽内のガス圧が低下するか否かを見ることにより前記電槽のシール箇所の密閉性を検査し、
前記電槽内に圧縮ガスが充填されている状態で前記排気孔を開いたときの前記電槽内のガス圧の低下の状況から前記一括排気通路が正常であるか否かを検査することを特徴とする鉛蓄電池の検査方法。 A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage communicating with the plurality of cell chambers is provided in the lid of the battery case, and an exhaust hole for communicating at least the inside of the collective exhaust passage with the outside is provided in the lid of the battery case. An inspection method for a lead storage battery that performs a sealing inspection of a sealing portion of the battery case of the formed lead storage battery and an inspection as to whether or not the collective exhaust passage is normal,
The lid of the battery case is provided with a hole that can be opened other than the exhaust hole, and the hole that can be opened is a gas filling port.
In a state where all the holes other than the gas filling port provided in the lid of the battery case are closed, all the holes provided in the lid of the battery case are filled with compressed gas in the battery case. Maintaining the closed state, inspecting the sealing property of the sealing portion of the battery case by checking whether the gas pressure in the battery case decreases,
Inspecting whether or not the collective exhaust passage is normal from the state of gas pressure drop in the battery case when the exhaust hole is opened in a state where the battery case is filled with compressed gas. Inspection method of the lead acid battery characterized. 横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記複数のセル室の並設方向の一端側及び他端側で前記一括排気通路内を外部に連通させる一対の排気孔が前記電槽の蓋の一端及び他端にそれぞれ形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記電槽の蓋に、前記排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、
前記電槽の蓋に設けられた前記ガス充填口以外の孔はすべて閉鎖した状態で、前記ガス充填口から電槽内に設定圧力まで圧縮ガスを充填した後一定の判定時間の間電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に前記電槽内のガス圧が低下するか否かを見ることにより前記電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、
前記密閉性検査過程で前記電槽内のガス圧の低下が見られなかったときに、前記排気孔の一方のみを開き、前記電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の前記電槽内の圧力の低下の状況から前記一括排気通路が正常であるか否かを検査する第１の排気通路検査過程を行い、
前記第１の排気通路検査過程で前記一括排気通路が正常であると判定されたときに、前記ガス充填口以外の孔をすべて閉鎖した状態で、前記ガス充填口から前記電槽内に設定圧力まで圧縮ガスを再充填した後、前記排気孔の他方のみを開き、前記電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の前記電槽内の圧力の低下の状況から前記一括排気通路が正常であるか否かを検査する第２の排気通路検査過程を行うことを特徴とする鉛蓄電池の検査方法。 A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage that communicates with the plurality of cell chambers in the lid of the battery case, and is disposed in the collective exhaust passage on one end side and the other end side in the juxtaposed direction of the plurality of cell chambers. A pair of exhaust holes communicating with the outside of the battery case are formed at one end and the other end of the lid of the battery case, respectively. It is an inspection method of a lead storage battery that performs an inspection of whether or not,
The lid of the battery case is provided with a hole that can be opened other than the exhaust hole, and the hole that can be opened is a gas filling port.
The holes other than the gas filling port provided in the lid of the battery case are closed, and after charging the compressed gas from the gas filling port to the set pressure into the battery case, the battery case is kept for a certain judgment time. Holding all the holes provided in the lid closed, and checking whether or not the gas pressure in the battery case is reduced during the determination time, the sealability of the sealing part of the battery case is improved. Perform a sealing inspection process to inspect,
When the gas pressure in the battery case is not reduced during the sealing test, only one of the exhaust holes is opened and all the other holes provided in the lid of the battery case are closed. Performing a first exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from the state of pressure drop in the battery case when
When it is determined in the first exhaust passage inspection process that the collective exhaust passage is normal, a set pressure from the gas filling port into the battery case is closed with all the holes other than the gas filling port closed. After refilling with compressed gas until the other of the exhaust holes is opened and all the other holes provided in the lid of the battery case are closed, the pressure drop in the battery case A method for inspecting a lead-acid battery, comprising performing a second exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal. 横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記複数のセル室の並設方向の一端側及び他端側で前記一括排気通路内を外部に連通させる一対の排気孔が前記電槽の蓋の一端及び他端にそれぞれ形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記電槽の蓋に、前記排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、
前記電槽の蓋に設けられた前記ガス充填口以外の孔はすべて閉鎖した状態で、前記ガス充填口から電槽内に設定圧力まで圧縮ガスを充填した後一定の判定時間の間電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に前記電槽内のガス圧が低下するか否かを見ることにより前記電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、
前記密閉性検査過程で前記電槽内のガス圧の低下が見られなかったときに、前記排気孔の一方のみを開き、前記電槽の蓋に設けられている他の孔をすべて閉鎖した状態を一定時間維持してその間の前記電槽内の圧力の低下の状況から前記一括排気通路が正常であるか否かを検査する第１の排気通路検査過程と、前記排気孔の他方のみを開き、前記電槽の蓋に設けられている他の孔をすべて閉鎖した状態にした際の前記電槽内の圧力の低下の状況から前記一括排気通路が正常であるか否かを検査する第２の排気通路検査過程とを行うことを特徴とする鉛蓄電池の検査方法。 A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage that communicates with the plurality of cell chambers in the lid of the battery case, and is disposed in the collective exhaust passage on one end side and the other end side in the juxtaposed direction of the plurality of cell chambers. A pair of exhaust holes communicating with the outside of the battery case are formed at one end and the other end of the lid of the battery case, respectively. A lead storage battery inspection method that performs an inspection of whether or not,
In the lid of the battery case, a hole that can be opened other than the exhaust hole is provided, and the hole that can be opened is a gas filling port.
The holes other than the gas filling port provided in the lid of the battery case are closed, and after charging the compressed gas from the gas filling port to the set pressure into the battery case, the battery case is kept for a certain judgment time. Holding all the holes provided in the lid closed, and checking whether or not the gas pressure in the battery case is reduced during the determination time, the sealability of the sealing part of the battery case is improved. Perform the sealing inspection process to inspect,
When the gas pressure in the battery case is not reduced during the sealing test, only one of the exhaust holes is opened and all the other holes provided in the lid of the battery case are closed. Is maintained for a certain period of time, and a first exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from the state of pressure drop in the battery case during that period, and only the other of the exhaust holes is opened A second test for checking whether or not the collective exhaust passage is normal based on a decrease in pressure in the battery case when all other holes provided in the lid of the battery case are closed. An inspection method for a lead-acid battery, comprising performing an exhaust passage inspection process. 横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記複数のセル室の並設方向の一端側及び他端側で前記一括排気通路内を外部に連通させる一対の排気孔が前記電槽の蓋の一端及び他端にそれぞれ形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記一対の排気孔の一方をガス充填口とし、前記電槽の蓋に設けられた他の孔はすべて閉鎖した状態で前記電槽内に圧縮ガスを設定圧力まで充填した後、一定の判定時間の間前記電槽の蓋に設けられたすべての孔を閉鎖した状態に保持して、該判定時間の間に前記電槽内のガス圧が低下したか否かを見ることにより前記電槽のシール箇所の密閉性を検査する密閉性検査過程を行い、
前記密閉性検査過程で前記電槽のシール箇所の密閉性が良好であると判定されたときに、前記一対の排気孔の他方のみを開き、前記電槽に設けられている他の孔をすべて閉鎖した状態に保持したときの前記電槽内の圧力の低下の状況から前記一括排気通路が正常であるか否かを検査する排気通路検査過程を行うことを特徴とする鉛蓄電池の検査方法。 A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage that communicates with the plurality of cell chambers in the lid of the battery case, and is disposed in the collective exhaust passage on one end side and the other end side in the juxtaposed direction of the plurality of cell chambers. A pair of exhaust holes communicating with the outside of the battery case are formed at one end and the other end of the lid of the battery case, respectively. A lead storage battery inspection method that performs an inspection of whether or not,
One of the pair of exhaust holes is used as a gas filling port, and all other holes provided in the lid of the battery case are closed, and after the compressed gas is filled up to a set pressure in the battery case, a predetermined determination time is reached. All the holes provided in the lid of the battery case are kept closed during this period, and whether or not the gas pressure in the battery case has decreased during the determination time Perform the sealing inspection process to check the sealing of the seal location,
When it is determined that the sealing performance of the sealing portion of the battery case is good in the sealing test process, only the other of the pair of exhaust holes is opened, and all other holes provided in the battery case are opened. An inspection method for a lead-acid battery, comprising performing an exhaust passage inspection process for inspecting whether or not the collective exhaust passage is normal from a state of a decrease in pressure in the battery case when held in a closed state. 横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記複数のセル室の並設方向の一端側及び他端側で前記一括排気通路内を外部に連通させる一対の排気孔が前記電槽の蓋の一端及び他端にそれぞれ形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記電槽の蓋に、前記排気孔以外に開放可能な孔を設けておいて、該開放可能な孔をガス充填口とし、
前記電槽の蓋に設けられた前記ガス充填口以外の孔はすべて閉鎖した状態で、前記ガス充填口から前記電槽内に設定圧力まで圧縮ガスを充填して、前記電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定し、
前記電槽内の圧力が設定圧力に達した時に前記電槽内へのガスの供給を停止して前記電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定値に達しているか否かにより前記一括排気通路が正常であるか否かを判定し、
前記電槽内へのガスの充填量が設定値に達していて前記一括排気通路が正常であると判定されたときに、一定の判定時間の間前記電槽に設けられているすべての孔を閉鎖した状態に保持して、前記判定時間の間に前記電槽内のガス圧が低下したか否かを見ることにより前記電槽のシール箇所の密閉性を検査することを特徴とする鉛蓄電池の検査方法。 A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage that communicates with the plurality of cell chambers in the lid of the battery case, and is disposed in the collective exhaust passage on one end side and the other end side in the juxtaposed direction of the plurality of cell chambers. A pair of exhaust holes communicating with the outside of the battery case are formed at one end and the other end of the lid of the battery case, respectively. A lead storage battery inspection method that performs an inspection of whether or not,
In the lid of the battery case, a hole that can be opened other than the exhaust hole is provided, and the hole that can be opened is a gas filling port.
With all the holes other than the gas filling port provided in the lid of the battery case closed, the compressed gas is filled from the gas filling port into the battery case up to a set pressure, and the pressure in the battery case is reduced. Measure the amount of gas filled in the battery until it reaches the set pressure,
When the pressure in the battery case reaches a set pressure, the supply of gas into the battery case is stopped and the pressure in the battery case measured until the pressure in the battery case reaches the set pressure is measured. It is determined whether or not the collective exhaust passage is normal depending on whether or not the gas filling amount has reached a set value,
When it is determined that the gas filling amount in the battery case reaches a set value and the collective exhaust passage is normal, all holes provided in the battery case for a certain determination time are opened. A lead-acid battery characterized in that it is kept in a closed state and the sealability of the sealed portion of the battery case is inspected by checking whether or not the gas pressure in the battery case has decreased during the determination time. Inspection method. 横方向に並べて配置された複数のセル室を内部に有する電槽本体と、前記電槽本体の上端に接合された蓋とからなる電槽と、前記電槽の各セル室内に収容された発電要素とを備えて、前記電槽の蓋内に前記複数のセル室に連通した一括排気通路が設けられ、前記複数のセル室の並設方向の一端側及び他端側で前記一括排気通路内を外部に連通させる一対の排気孔が前記電槽の蓋の一端及び他端にそれぞれ形成されている鉛蓄電池の前記電槽のシール箇所の密閉性の検査と前記一括排気通路が正常であるか否かの検査とを行う鉛蓄電池の検査方法であって、
前記一対の排気孔の一方をガス充填口とし、前記電槽の蓋に設けられている他の孔をすべて閉鎖した状態で、前記ガス充填口から前記電槽内に圧縮ガスを設定圧力まで充填して、前記電槽内の圧力が設定圧力に達するまでの間に該電槽内に充填されたガスの量を測定し、
前記電槽内の圧力が設定圧力に達した時に前記電槽内へのガスの充填を停止して、前記電槽内の圧力が設定圧力に達するまでの間に測定された該電槽内へのガスの充填量が設定値に達しているか否かにより前記一括排気通路が正常であるか否かを判定し、
前記電槽内へのガスの充填量が設定値に達していて前記一括排気通路が正常であると判定されたときに、次いで一定の判定時間の間前記電槽に設けられているすべての孔を閉鎖した状態に保持して、前記判定時間の間に前記電槽内のガス圧が低下したか否かを見ることにより前記電槽のシール箇所の密閉性を検査することを特徴とする鉛蓄電池の検査方法。
A battery case comprising a battery case body having a plurality of cell chambers arranged side by side in the inside, a lid joined to the upper end of the battery case body, and power generation housed in each cell room of the battery case A collective exhaust passage that communicates with the plurality of cell chambers in the lid of the battery case, and is disposed in the collective exhaust passage on one end side and the other end side in the juxtaposed direction of the plurality of cell chambers. A pair of exhaust holes communicating with the outside of the battery case are formed at one end and the other end of the lid of the battery case, respectively. A lead storage battery inspection method that performs an inspection of whether or not,
One of the pair of exhaust holes is used as a gas filling port, and all the other holes provided in the lid of the battery case are closed, and the gas tank is filled with compressed gas up to a set pressure. And measuring the amount of gas filled in the battery case until the pressure in the battery case reaches a set pressure,
When the pressure in the battery case reaches a set pressure, the filling of the gas into the battery case is stopped, and the pressure in the battery case is measured until the pressure in the battery case reaches the set pressure. Determining whether or not the collective exhaust passage is normal depending on whether or not the gas filling amount has reached a set value,
When it is determined that the gas filling amount in the battery case has reached a set value and the collective exhaust passage is normal, then all the holes provided in the battery case for a certain determination time. The lead is characterized by inspecting the sealing property of the sealing portion of the battery case by checking whether or not the gas pressure in the battery case has decreased during the determination time. Storage battery inspection method.
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