JPH0521089A - Airtightness inspection of lead-acid battery and device therefore - Google Patents
Airtightness inspection of lead-acid battery and device thereforeInfo
- Publication number
- JPH0521089A JPH0521089A JP3174222A JP17422291A JPH0521089A JP H0521089 A JPH0521089 A JP H0521089A JP 3174222 A JP3174222 A JP 3174222A JP 17422291 A JP17422291 A JP 17422291A JP H0521089 A JPH0521089 A JP H0521089A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- inspection
- pressure
- battery
- hydrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉛蓄電池の気密検査方
法とその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airtightness inspection method for a lead storage battery and an apparatus therefor.
【０００２】[0002]
【従来の技術】負極吸収式シール形鉛蓄電池において
は、その蓄電池の気密を保つことは、蓄電池の保存特性
上重要なことである。すなわち、蓄電池電槽とくに電槽
と蓋との接合部分、電極端子を挿通する部分などの気密
が保たれないと、大気中の酸素が蓄電池内に侵入し、鉛
蓄電池の負極活物質である海綿状鉛と反応してこれを酸
化鉛とする。負極活物質が酸化されると勿論蓄電池の放
電容量が少なくなるため、通常の負極吸収式シール形鉛
蓄電池では、厳密に気密検査をして気密不良品を完成品
にしないようにする必要がある。2. Description of the Related Art In a negative electrode absorption type sealed lead-acid battery, it is important for the storage characteristics of the battery to keep the battery airtight. That is, if airtightness is not maintained in the storage battery battery case, especially at the junction between the battery container and the lid and the part where the electrode terminal is inserted, oxygen in the atmosphere will enter the storage battery and cause sponge, which is the negative electrode active material of the lead storage battery. Reacts with lead oxide to form lead oxide. Of course, when the negative electrode active material is oxidized, the discharge capacity of the storage battery decreases, so it is necessary to perform a rigorous airtight inspection on normal negative electrode absorption type sealed lead-acid batteries to prevent defective products from becoming finished products. .
【０００３】以下に従来の鉛蓄電池の気密検査方法およ
びその装置について図を参照しながら説明する。A conventional airtightness inspection method for a lead storage battery and its apparatus will be described below with reference to the drawings.
【０００４】図３において、電槽１は隔壁によって内部
が仕切られて極板、セパレータ、電解液などが充填され
ることになる多くの素電池１−ａを構成しており、全体
として蓋２により気密に覆蓋されている。３は蓋２の各
素電池１−ａの上部に相応する部分に設けた排気孔であ
る。そしてこの排気孔３は逆止弁付きの排気孔になって
おり気密検査が終了して電池として保存される場合に、
電槽１を排気して後、大気が逆止弁によって侵入しない
よう電槽１を減圧に維持する役目をするものである。４
はガス導入管で、バルブ５を介し、前記排気孔３を利用
して電槽１内に検査ガスを圧入するものである。この検
査ガスは水素ガスであってもよいが、多くは水素ガスと
窒素ガスとの混合ガスである。６は電槽１と蓋２との接
合部分７に沿って密着させた側壁ガス採集板で、上記接
合部分７は接着剤によって気密に接着されているもので
あるが、電槽１内に圧入された検査ガスが接合部分７よ
り電池外に漏洩するのを捕集するものである。８は電極
端子９が蓋２の上部に挿通されている部分より電池外に
漏洩する検査ガスを捕集する端子部ガス捕集箱である。
そして側壁ガス採集板６と端子部ガス捕集箱８はガスセ
ンサー１０に連通している。上記ガスセンサー１０は検
査ガス中の水素ガスによって電気抵抗が変化してガスセ
ンサー１０に接続された電気回路に電圧出力として出力
され蓄電池の気密不良を発見することができる役目をす
るものである。このガスセンサー１０は一般に熱線式半
導体ガスセンサーが使用されている。In FIG. 3, the battery case 1 constitutes a large number of unit cells 1-a which are partitioned by a partition wall and filled with an electrode plate, a separator, an electrolytic solution and the like, and a lid 2 as a whole. Is airtightly covered by. Reference numeral 3 denotes an exhaust hole provided in a portion of the lid 2 corresponding to the upper portion of each unit cell 1-a. The exhaust hole 3 is an exhaust hole with a check valve, and when the airtightness inspection is completed and the battery is stored as a battery,
After exhausting the battery case 1, it serves to keep the battery container 1 at a reduced pressure so that the atmosphere does not enter by the check valve. Four
Is a gas introducing pipe for injecting a test gas into the battery case 1 through the exhaust hole 3 through the valve 5. The inspection gas may be hydrogen gas, but most of the inspection gas is a mixed gas of hydrogen gas and nitrogen gas. Reference numeral 6 denotes a side wall gas collecting plate which is closely attached along the joint portion 7 between the battery case 1 and the lid 2. The joint portion 7 is hermetically bonded with an adhesive, but is press-fitted into the battery case 1. It collects the leaked inspection gas from the joint portion 7 to the outside of the battery. Reference numeral 8 is a terminal portion gas collection box for collecting the inspection gas leaked to the outside of the battery from the portion where the electrode terminal 9 is inserted in the upper portion of the lid 2.
The side wall gas collection plate 6 and the terminal gas collection box 8 communicate with the gas sensor 10. The gas sensor 10 serves to detect the airtightness of the storage battery by changing its electric resistance due to hydrogen gas in the test gas and outputting it as a voltage output to an electric circuit connected to the gas sensor 10. As the gas sensor 10, a hot wire type semiconductor gas sensor is generally used.
【０００５】上記装置を使用して検査ガスを排気孔３よ
り圧入し、気密不良箇処があると、その部分より検査ガ
スが漏洩してガスセンサー１０に作用してガスセンサー
１０の電気抵抗を変化させるので、その電圧を見ること
により蓄電池の気密不良の有無を検査するのが従来の検
査方法であった。When the inspection gas is press-fitted through the exhaust hole 3 using the above-mentioned device and there is a portion where airtightness is poor, the inspection gas leaks from that portion and acts on the gas sensor 10 to change the electric resistance of the gas sensor 10. Since the voltage is changed, the conventional inspection method is to inspect the storage battery for the presence or absence of airtightness by checking the voltage.
【０００６】しかしながら、上記の従来の気密検査方法
およびその装置では蓄電池の気密不良を充分に発見する
結果は得られ難かった。その理由の第１は検査ガス中の
水素ガスの量を大量にすることができないため、ガスセ
ンサー１０による検出感度が充分でないということであ
った。However, it is difficult to obtain the result of sufficiently detecting the airtightness of the storage battery by the above-mentioned conventional airtightness inspection method and its apparatus. The first reason is that the detection sensitivity of the gas sensor 10 is not sufficient because the amount of hydrogen gas in the test gas cannot be increased.
【０００７】すなわち、検査ガスを各素電池１−ａを構
成する電槽１内に多量に圧入することは蓄電池の強度上
の問題から困難であり、普通には０.4kg／cm2 程度の圧
入にとどめていた。That is, it is difficult to pressurize a large amount of the test gas into the battery case 1 constituting each unit cell 1-a because of the problem of the strength of the storage battery, and it is usually about 0.4 kg / cm 2 . It was only press-fitting.
【０００８】また圧入する検査ガス中の水素ガスの濃度
は爆発の危険性より余り濃くすることができず、電槽１
内では検査ガスを圧入した状態で水素濃度を３％程度に
抑えねばならなかった。従って上記の理由から蓄電池内
に圧入される水素ガスの量は多くなく、しかも電槽１内
に存在していた空気によって希釈されるため、余計に水
素ガスが薄く、この水素ガスを検知するガスセンサー１
０の検知能力は低くなり、図４にも見られるようにセン
サー出力はピークで４０ミリボルトを若干下廻る程度で
あった。Further, the concentration of hydrogen gas in the test gas to be injected cannot be made much higher than the danger of explosion, and the battery case 1
Inside, the hydrogen concentration had to be suppressed to about 3% while the inspection gas was being injected. Therefore, due to the above reason, the amount of hydrogen gas injected into the storage battery is not large and is diluted by the air existing in the battery case 1, so that the hydrogen gas is extra thin and the gas for detecting this hydrogen gas is used. Sensor 1
The detection capability of 0 was low, and as can be seen in FIG. 4, the sensor output peaked at slightly less than 40 millivolts.
【０００９】更に他の理由は、検査ガスを電槽１内に単
に圧入するのみであるため、気密不良が電槽１内の減圧
のときに発生することを検査することができなかったと
いうことである。とくに電槽１と蓋２との接合部分７が
接着剤によって閉塞されているものであるため、減圧時
の気密不良が多いことが考えられる。負極吸収式シール
形鉛蓄電池は、通常電槽内部の空気の酸素を吸収するた
めに、保存中は電槽内部を減圧にしておくものであるか
ら、図４の加圧工程にみられるように従来１度だけの加
圧検査では充分な気密検査方法とはいえないものであ
る。Still another reason is that since the inspection gas is simply injected into the battery case 1, it cannot be inspected that the airtightness failure occurs when the pressure in the battery case 1 is reduced. Is. In particular, since the joint portion 7 between the battery case 1 and the lid 2 is closed by the adhesive, it is considered that there are many airtight defects when the pressure is reduced. Since the negative electrode absorption type sealed lead-acid battery normally absorbs oxygen in the air inside the battery case, the pressure inside the battery case is reduced during storage. Conventionally, the pressure inspection only once is not a sufficient airtightness inspection method.
【００１０】[0010]
【発明が解決しようとする課題】本発明は、前記従来技
術の問題点である蓄電池を構成する電槽内に圧入する検
査ガスが電槽内の既存空気によって希釈されること、お
よび電槽内が減圧状態になったときの気密不良を発見で
きないということを一挙に解決しようとするものであ
る。SUMMARY OF THE INVENTION According to the present invention, the inspection gas, which is a problem of the above-mentioned conventional technique, is injected into the battery case constituting the storage battery and is diluted by the existing air in the battery case. This is to solve all of the problems that the airtightness cannot be found when the pressure is reduced.
【００１１】[0011]
【課題を解決するための手段】本発明は、前記する課題
を解決するために、蓄電池を構成する電槽内に検査ガス
を圧入する加圧工程と吸引による減圧工程とを繰返すこ
とにより、電槽内のガスを殆んど検査ガスのみに置換
し、しかも加圧時と減圧時の両方においてガスセンサー
により気密不良を検知する方法と装置を提供するもので
ある。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, by repeating a pressurizing step of injecting a test gas into a battery container constituting a storage battery and a depressurizing step by suction, the electric power is reduced. (EN) A method and an apparatus for replacing gas in a tank with almost all test gas and detecting gas tightness by a gas sensor both during pressurization and under pressure.
【００１２】[0012]
【作用】本発明の鉛蓄電池の気密検査方法とその装置に
よれば、電槽内の既存ガスを検査ガスに置換して、漏洩
ガスをガスセンサーにより検査するので、電槽内に既存
する空気によって検査ガスが希釈されていることがな
く、しかも蓄電池内の加圧時と減圧時という実使用時を
含む状態での気密不良有無を検査するので、信頼性の高
い検査ができる。According to the airtightness inspection method and apparatus for a lead storage battery of the present invention, the existing gas in the battery case is replaced with the inspection gas, and the leak gas is inspected by the gas sensor. Since the inspection gas is not diluted by the above method, and the presence or absence of airtightness is checked in a state including actual use such as pressurization and depressurization in the storage battery, a highly reliable inspection can be performed.
【００１３】[0013]
【実施例】以下本発明の一実施例について述べる。EXAMPLE An example of the present invention will be described below.
【００１４】図１は、気密不良鉛蓄電池を、熱線式半導
体ガスセンサーを用い、かつ本発明の気密検査方法によ
って、検査を行なった結果を示すものである。まず３％
の水素ガスを含む窒素ガスを検査ガスとして図３の従来
例と同様に排気孔より電槽内に圧入する。この圧入によ
る電槽内の圧力は大気圧＋０.4kg／cm2 となる。これを
加圧１次工程とし、次に吸引ポンプによって電槽内の空
気および検査ガスを吸引して電槽内を大気圧より−０.4
kg／cm2 に減圧する。これを減圧１次工程とする。その
後さらに検査ガスを圧入して加圧２次工程に移行する。
電槽内は加圧工程と減圧工程の両方の圧力がかかり電槽
等の歪みが生じ、漏れ孔がある場合は、電槽内に圧入さ
れた検査ガスが通過して電槽外に漏洩する。この加圧と
減圧の工程を繰り返すことにより、電槽内の水素ガス濃
度は高くなり図１に示すように３％である検査ガス水素
濃度に近い値を示すようになる。この電槽内の水素濃度
が高いとセンサー検出感度が向上する。またこの加圧１
次工程、減圧１次工程さらに加圧２次工程と加圧、減圧
を繰返すことにより蓋と電槽の接合部分などの気密度が
検査することができる。加圧２次工程で検査ガスを電槽
内に圧入して、検査を終了し、図３に示す装置と同様、
ガス導入管を排気孔より離すと、電槽内の検査ガスが、
逆止弁を通って電槽回りの大気中に拡散される。しかし
逆止弁によって大気が電槽内に侵入することはない。そ
こで減圧２次工程で電槽内を減圧しておけば電槽内より
検査ガスが大気中に漏洩することもなく負極吸収式シー
ル形鉛蓄電池においてはその保存特性が良いものであ
る。FIG. 1 shows the result of inspecting a lead-acid battery having a poor airtightness by using a hot wire type semiconductor gas sensor and by the airtightness inspection method of the present invention. First 3%
Nitrogen gas containing hydrogen gas as the inspection gas is injected into the battery case through the exhaust hole as in the conventional example shown in FIG. The pressure in the battery case due to this press-fitting is atmospheric pressure + 0.4 kg / cm 2 . This is the pressurizing primary process, and then the suction pump sucks the air and test gas in the battery case to lower the atmospheric pressure in the battery case by -0.4.
Reduce the pressure to kg / cm 2 . This is the depressurization primary step. After that, the inspection gas is further injected to shift to the pressurization secondary process.
If pressure in both the pressurizing process and the depressurizing process is applied inside the battery case and the battery container is distorted and there is a leak hole, the inspection gas press-fitted into the battery container passes and leaks to the outside of the battery container. . By repeating the steps of pressurization and depressurization, the hydrogen gas concentration in the battery case becomes high, and as shown in FIG. 1, the hydrogen gas concentration becomes close to the test gas hydrogen concentration of 3%. When the hydrogen concentration in this battery case is high, the sensor detection sensitivity is improved. This pressurization 1
By repeating the next step, the first depressurization step, the second pressurization step, and the pressurization and depressurization, the airtightness of the joint portion between the lid and the battery case can be inspected. In the pressurizing secondary process, the inspection gas is injected into the battery case to finish the inspection, and like the device shown in FIG.
When the gas introduction pipe is separated from the exhaust hole, the inspection gas in the battery case
It diffuses into the atmosphere around the battery case through the check valve. However, the check valve does not allow the atmosphere to enter the battery case. Therefore, if the inside of the battery case is depressurized in the depressurization secondary step, the inspection gas does not leak into the atmosphere from the battery case, and the storage characteristics are good in the negative electrode absorption type sealed lead acid battery.
【００１５】なお図１において、ガスセンサーを接続し
た電気回路の出力は加圧１次工程で２０ミリボルトと低
い電圧値を示しているが、減圧１次工程および加圧２次
工程を経過して電槽内の空気を検査ガスに置換し、水素
ガス濃度が高くなると８０ミリボルトを示しセンサー感
度が高いことを表わしている。そして減圧２次工程を経
て電槽内が排気されると電圧値は急降下していることが
判る。しかしこのガスセンサー出力を示す曲線を見れ
ば、検査に供された鉛蓄電池は気密不良の製品であるこ
とが明白に把握することができる。In FIG. 1, the output of the electric circuit to which the gas sensor is connected shows a low voltage value of 20 millivolts in the primary pressure step, but after the primary pressure step and the secondary pressure step, When the air in the battery case is replaced with the inspection gas and the hydrogen gas concentration becomes high, it shows 80 millivolts, indicating that the sensor sensitivity is high. It can be seen that when the inside of the battery case is evacuated through the depressurization secondary process, the voltage value drops sharply. However, by looking at the curve showing the output of this gas sensor, it can be clearly understood that the lead storage battery subjected to the inspection is a product with poor airtightness.
【００１６】図２には、電槽内の検査ガス濃度を本実施
例により高くすることにより、センサーの検出感度は従
来法における検出感度より２.5倍にもなっていることを
示し、いかに電槽内の空気を検査ガスに置き換えること
が重要であるかを示している。FIG. 2 shows that the detection sensitivity of the sensor is 2.5 times higher than that of the conventional method by increasing the test gas concentration in the battery case according to this embodiment. It shows that it is important to replace the air in the battery case with a test gas.
【００１７】以上の実施例においては、検査ガスは水素
ガスを含む窒素ガスを使用し、ガスセンサーはその水素
ガスによって抵抗値変化をする熱線式半導体を使用した
もので、このセンサーは水素濃度が数ＰＰＭから数千Ｐ
ＰＭまでは感度が比例する特徴がある。しかしこのセン
サーおよび水素ガスを含む窒素ガスに本発明は限定され
るものでなく、電槽内に気密不良箇所があるかどうかを
検出するガスおよびそのガスセンサーを使用することが
できるものである。In the above embodiments, the test gas is nitrogen gas containing hydrogen gas, and the gas sensor is a hot wire semiconductor whose resistance value changes according to the hydrogen gas. From several PPM to several thousand P
The sensitivity is proportional up to PM. However, the present invention is not limited to this sensor and nitrogen gas containing hydrogen gas, and it is possible to use a gas for detecting whether or not there is a defective airtight portion in the battery case, and the gas sensor therefor.
【００１８】そして本実施例による気密不良の発見率は
唯一回の検査ガス加圧による従来の検査方法に比較して
５０％増大し、３２,0００個の蓄電池を検査した処、４
９個におよび気密不良率０.1５％の実績を挙げた。The detection rate of the airtightness defect according to the present embodiment is increased by 50% as compared with the conventional inspection method by pressurizing the inspection gas only once, and when 32,000 storage batteries are inspected, 4
The airtight defective rate was 0.15% for 9 pieces.
【００１９】[0019]
【発明の効果】以上の本発明の実施例により明らかなよ
うに、検査ガスを電槽内に圧入するのみでなく、減圧を
して電槽内の既存の空気を検査ガスにできる限り置換し
て、ガスセンサーによる検出を容易にし、かつ蓄電池の
実使用時を含めて経過する電槽の減圧時の気密不良を的
確に把握することのできる優れた気密検査方法とその装
置を実現したものである。As is apparent from the above-described embodiments of the present invention, not only is the test gas injected into the battery case but also the pressure in the battery is reduced to replace the existing air in the battery container with the test gas as much as possible. In addition, we have realized an excellent airtightness inspection method and its device that makes it easy to detect with a gas sensor and accurately grasps the airtightness of the battery case during depressurization including the actual use of the storage battery. is there.
【図１】本発明の１実施例における気密検査方法の工程
と、電槽内水素濃度およびガスセンサーを接続した回路
の出力を示した説明図FIG. 1 is an explanatory view showing the steps of an airtightness inspection method according to one embodiment of the present invention, the hydrogen concentration in a battery case, and the output of a circuit to which a gas sensor is connected.
【図２】同検査ガス濃度とガスセンサーの検出感度比を
示した説明図FIG. 2 is an explanatory diagram showing the inspection gas concentration and the detection sensitivity ratio of the gas sensor.
【図３】従来例の気密検査装置を示す斜視略図FIG. 3 is a schematic perspective view showing a conventional airtightness inspection device.
【図４】同気密検査方法の工程とガスセンサーを接続し
た回路の出力を示した説明図FIG. 4 is an explanatory diagram showing the steps of the airtightness inspection method and the output of a circuit to which a gas sensor is connected.
１ 電槽 １−ａ 素電池 ２ 蓋 ３ 排気孔 ４ ガス導入管 ６ 側壁ガス採集板 ８ 端子部ガス捕集箱 １０ ガスセンサー 1 battery case 1-a unit cell 2 lid 3 exhaust holes 4 gas introduction pipes 6 Side wall gas collection plate 8 terminal gas collection box 10 gas sensor
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂田 安平 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor, Anhei Sakata 1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric Sangyo Co., Ltd.
Claims (4)
と、電槽内のガスを吸引する減圧工程と、電槽外に気密
不良箇処より漏洩する検査ガスを検知するガスセンサー
とを有する鉛蓄電池の気密検査方法。1. A pressurizing step of injecting a test gas into the battery case, a depressurizing step of sucking the gas in the battery case, and a gas sensor for detecting the test gas leaking outside the battery container from a defective airtight portion. Airtight inspection method for lead-acid batteries having a.
ガスを送入するガス導入管と、電槽内のガスを吸引する
吸引ポンプと、電槽と蓋との接合部分に密着する側壁ガ
ス採集板と、電極端子を挿通する端子部分に密着した端
子部ガス捕集箱と、上記側壁ガス採集板および端子部ガ
ス捕集箱に連通するガスセンサーとを具備する鉛蓄電池
の気密検査装置。2. A gas introducing pipe for feeding an inspection gas through an exhaust hole provided in a lid in a battery case, a suction pump for sucking gas in the battery container, and a contact portion at a joint between the battery container and the lid. Airtight inspection of a lead acid battery including a sidewall gas collection plate, a terminal gas collection box that is in close contact with a terminal portion through which an electrode terminal is inserted, and a gas sensor that communicates with the sidewall gas collection plate and the terminal gas collection box. apparatus.
素ガスとの混合ガスとし、ガスセンサーを水素ガスの作
用により抵抗値を変化する水素検知用半導体とした請求
項１記載の鉛蓄電池の気密検査方法。3. The airtightness of a lead storage battery according to claim 1, wherein the inspection gas is hydrogen gas or a mixed gas of hydrogen gas and nitrogen gas, and the gas sensor is a semiconductor for hydrogen detection whose resistance value changes by the action of hydrogen gas. Inspection method.
素ガスとの混合ガスとし、ガスセンサーを水素ガスの作
用により抵抗値を変化する水素検知用半導体とした請求
項２記載の鉛蓄電池の気密検査装置。4. The airtightness of a lead storage battery according to claim 2, wherein the inspection gas is hydrogen gas or a mixed gas of hydrogen gas and nitrogen gas, and the gas sensor is a hydrogen detecting semiconductor whose resistance value changes by the action of hydrogen gas. Inspection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03174222A JP3120122B2 (en) | 1991-07-16 | 1991-07-16 | Airtightness inspection method and device for lead storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03174222A JP3120122B2 (en) | 1991-07-16 | 1991-07-16 | Airtightness inspection method and device for lead storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0521089A true JPH0521089A (en) | 1993-01-29 |
| JP3120122B2 JP3120122B2 (en) | 2000-12-25 |
Family
ID=15974862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03174222A Expired - Fee Related JP3120122B2 (en) | 1991-07-16 | 1991-07-16 | Airtightness inspection method and device for lead storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3120122B2 (en) |
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