JPS62177872A - Method of measuring extent of battery charge - Google Patents
Method of measuring extent of battery chargeInfo
- Publication number
- JPS62177872A JPS62177872A JP61019837A JP1983786A JPS62177872A JP S62177872 A JPS62177872 A JP S62177872A JP 61019837 A JP61019837 A JP 61019837A JP 1983786 A JP1983786 A JP 1983786A JP S62177872 A JPS62177872 A JP S62177872A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- light
- solution
- decrease
- wavelength
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000002834 transmittance Methods 0.000 claims description 19
- 230000031700 light absorption Effects 0.000 claims description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000010409 thin film Substances 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/484—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring electrolyte level, electrolyte density or electrolyte conductivity
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Tests Of Electric Status Of Batteries (AREA)
- Secondary Cells (AREA)
Abstract
Description
【発明の詳細な説明】
扱帆九艷
本発明は、バッテリの充ｆｆ１Ｊｉを測定する方法に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring the charge ff1Ji of a battery.
皿米挟麦
従来、バッテリの充Ｗｉ量を測定するには、バシテリ液
の比重をフロートの浮量によってａ＋１定する方法、ま
たは無負荷時におけるバッテリ端子電圧を計測する方法
が実施されているが、前者のフロート式による測定方法
では車載バッテリの場合に車両の走行中は測定不能とな
り、また後者の測定方法ではバッテリ端子電圧がバッテ
リの充電、放電状態により変化して不具合を生じてしま
う。Traditionally, to measure the amount of charge in a battery, the specific gravity of the baciteli fluid is determined by the floating amount of a float (a+1), or the method is to measure the battery terminal voltage under no load. In the former float type measurement method, it is impossible to measure when the vehicle is running in the case of an on-vehicle battery, and in the latter measurement method, the battery terminal voltage changes depending on the charging and discharging state of the battery, causing problems.
音度
本発明は以上の点を考慮してなされたもので、バッテリ
の設置環境またはその使用状態などの影響を受けること
なく、常にバッテリの充電量を精度良く測定することが
できるバッテリ充電量測定方法を提供するものである。Sound Intensity The present invention has been made in consideration of the above points, and is a battery charge amount measurement method that can always accurately measure the battery charge amount without being affected by the installation environment of the battery or its usage condition. The present invention provides a method.
１廣
本発明はその目的達成のため、バッテリの放電によって
バッテリ溶液が化学変化する際、その放電量に比例して
その溶液中で生ずる光吸収作用に着目し、その光吸収の
程度を測定することによって溶液の反応状態からバッテ
リ充電量を間接的にねり出すようにしている。In order to achieve the objective, the present invention focuses on the light absorption effect that occurs in the solution in proportion to the amount of discharge when the battery solution changes chemically due to battery discharge, and measures the degree of light absorption. By doing so, the battery charge amount is indirectly derived from the reaction state of the solution.
以下、添付図面を参照して本発明の一実施例について詳
述する。Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.
本発明によるバッテリ充電音測定方法にあっては、バッ
テリの充、放電によりバッテリ溶液が次式にしたがって
化学変化する際、放電時の溶液中に発生する０１１基に
よって光吸収作用がなされる点に着目し、０ＨＪＪによ
る光吸収の量を、ＯＨ基により光吸収される第３次高調
波の波長λ１ （約９７５ｎｍ）をもった光をバッテリ
溶液中に透過きせたときの透過率の低下をみることによ
ってａｌｌ！その際、汚れなどによるバッテリ溶液自体
による透過率の低下の影響をなくすために、前記波長λ
１に比較的近＜、ＯＨ基などのバッテリ溶液の反応によ
っては光吸収されることがない安定な帯域にある透過率
の高い近赤外域の波長λ２（約１０１０７０ｎをもった
光をバッテリ溶液中に透過させたときの透過率の低下を
測定し、その測定値にもとづいて単位体積当りのＯＨ基
での光吸収による透過率の低下を相対的に求めるように
する。In the method for measuring battery charging sound according to the present invention, when the battery solution undergoes a chemical change according to the following equation due to battery charging and discharging, a light absorption effect is performed by the 011 group generated in the solution during discharging. Focusing on the amount of light absorption by 0HJJ, we looked at the decrease in transmittance when light with the third harmonic wavelength λ1 (approximately 975 nm) absorbed by OH groups was transmitted through the battery solution. By all! At this time, in order to eliminate the influence of a decrease in transmittance due to the battery solution itself due to dirt, etc., the wavelength λ
Light with a wavelength λ2 (approximately 101070n) in the near-infrared region with high transmittance in a stable band where light is not absorbed by reactions in the battery solution such as OH groups, which is relatively close to 1 The decrease in transmittance when the light is transmitted is measured, and based on the measured value, the decrease in transmittance due to light absorption by OH groups per unit volume is determined relatively.
すなわち、この場合には、
の比によるバッテリ溶液の反応状態をみることによって
バッテリの充電量を測定することができる。That is, in this case, the charge amount of the battery can be measured by observing the reaction state of the battery solution according to the ratio.
また本発明の他の実施例としては、バッテリ放電時の溶
液中に発生するＯＨ基およびＳ○牛基によってそれぞれ
光吸収作用がなされる点に着目し。In another embodiment of the present invention, attention is paid to the fact that the OH group and the SO group generated in the solution when the battery is discharged each have a light absorption effect.
ＯＨ基による光吸収の量をＯＨ基の第１次高調波の波長
λ１′ （約３μｍ）をもった光をバッテリ溶液中に透
過させたときの透過率の低下をみることによって測定す
るとともに、ＳＯ４基による光吸収の量をｓ ０４基の
第１次高調波の波長λ２′（約９μｍ）をもった光をバ
ッテリ溶液中に透過させたときの透過率の低下をみるこ
とによって測定し、その相対比をみることによってバッ
テリの充電量を求める。The amount of light absorption by OH groups is measured by observing the decrease in transmittance when light having the wavelength λ1' (approximately 3 μm) of the first harmonic of OH groups is transmitted through the battery solution. The amount of light absorption by the SO4 group was measured by observing the decrease in transmittance when light having the wavelength λ2' (approximately 9 μm) of the first harmonic of the SO4 group was transmitted through the battery solution. By looking at the relative ratio, the amount of battery charge is determined.
すなわち、この場合には、
の比によるバッテリ溶液の反応状態をみることによって
バッテリの充電量を測定することができる。That is, in this case, the charge amount of the battery can be measured by observing the reaction state of the battery solution according to the ratio.
このようにＯＨ基とＳＯ４基とによる各光吸収の程度の
比をみるようにすれば、汚れなどによるバッテリ溶液自
体による光透過率の低下の影響を受けることがなくなる
。By looking at the ratio of the degree of light absorption by OH groups and SO4 groups in this way, the light transmittance is not affected by the decrease in light transmittance due to the battery solution itself due to dirt or the like.
第１図は本発明によるバッテリ充電量測定方法を具体的
に実施するための装置の一例を示すもので、ＯＨ基によ
る光吸収波長λｌと非吸収波長λ２とを含む波長帯域を
もった発光スペクトルをもつ光源ｌ （白色光源でよい
）から発せられる光Ｐを透明な容器に入れられたバッテ
リ溶液２中に通し、その通過光Ｐ′を目的とする波長λ
ｌ、λ２の各波長選択性をもった薄膜干渉フィルタによ
る光学フィルタ３１．３２を介して光起電効果をもった
受光素子４１．４２によりそれぞれ受光させ。FIG. 1 shows an example of an apparatus for specifically carrying out the method for measuring battery charge amount according to the present invention, and shows an emission spectrum having a wavelength band including a light absorption wavelength λl due to OH groups and a non-absorption wavelength λ2. Pass the light P emitted from a light source l (a white light source is sufficient) into the battery solution 2 placed in a transparent container, and the transmitted light P' has a target wavelength λ
The light is received by a light receiving element 41.42 having a photovoltaic effect through an optical filter 31.32 which is a thin film interference filter having wavelength selectivity of 1 and λ2.
その各受光素子４１．４２の出力１１．１２にもとづい
て演算処理回路５により相対比Ｉ １／Ｉ ２を求めて
バッテリの充電量に比例した測定出力を生じさせるよう
になっている。なおここで、光源１とバッテリ容器との
間、およびバッテリ容器と各受光部との間をそれぞれ光
フアイバケーブルによって接続するようにしてもよい。Based on the outputs 11.12 of each of the light receiving elements 41.42, the arithmetic processing circuit 5 calculates the relative ratio I 1 /I 2 to produce a measurement output proportional to the amount of charge of the battery. Here, the light source 1 and the battery container and the battery container and each light receiving section may be connected by optical fiber cables.
第２図に、光学フィルタ３，４の各光透過特性を示して
いる。FIG. 2 shows the light transmission characteristics of the optical filters 3 and 4.
また、各受光素子４１．４２としてそれぞれ以下に説明
するような波長選択性をもった特殊なものを使用すれば
、光学フィルタ３，４を用いる必要がなくなる。Furthermore, if special light-receiving elements 41 and 42 having wavelength selectivity as described below are used, it becomes unnecessary to use optical filters 3 and 4.
すなわち、その特殊な受光素子としては、第３図に示す
ように、ｎ形半導体部分にＰ形不純物が拡散された光起
電層１０１上に、所定の光透過特性をもった半導体層１
０２を積層させることによって構成されている。That is, as shown in FIG. 3, this special light-receiving element consists of a semiconductor layer 1 having predetermined light transmission characteristics on a photovoltaic layer 101 in which a P-type impurity is diffused in an n-type semiconductor portion.
It is constructed by laminating 02.
光起電層１０１は、例えば、ＧａＡｓのｎ形部板上に、
禁止帯幅Ｅｇｌを決定することにより、第４図に示すよ
うに感度領域の波長限界となる波長λ０を所定に設定す
るべく、ＧａとＩｎとＰとの各比率を管理した比較的禁
止帯幅の広いｎ形のＩ ＩＩＧ ａ Ａ ｓ Ｐなどの
混晶を液相成長させたうえで、Ｐ形不純物を拡散させる
ことによりＰ−Ｎ接合を形成している。第４図は、光起
電ＷＪ１０１の波長に対する光電流１の感度特性を示し
ている。The photovoltaic layer 101 is, for example, on an n-type part plate of GaAs,
By determining the forbidden band width Egl, a relatively forbidden band width is determined in which the ratios of Ga, In, and P are controlled in order to set the wavelength λ0, which is the wavelength limit of the sensitivity region, to a predetermined value as shown in Fig. 4. A P-N junction is formed by growing a wide n-type mixed crystal such as IIIIG a As P in a liquid phase and then diffusing P-type impurities. FIG. 4 shows the sensitivity characteristics of the photocurrent 1 with respect to the wavelength of the photovoltaic WJ101.
半導体ｙｆ９１０２は、ＧａとＩｎとＰとの各比率を管
理することにより禁止帯幅Ｅｇ２を光起電層１０１の禁
止帯幅Ｅｇｌよりも広くした１ｎＧａＡｓＰを液相成長
させることにより積層形成され、第５図の波長に対する
光透過率の特性で示すように、光起電層１０１の感度特
性におけるピーク波長λｐよりも短波長側に設定された
波長λＣより長波長側に光透過帯域を有する光透過特性
をもたせるようにしている。The semiconductor yf9102 is formed by stacking 1nGaAsP in a liquid phase, with the bandgap Eg2 being wider than the bandgap Egl of the photovoltaic layer 101 by controlling the ratios of Ga, In, and P. As shown in the characteristics of light transmittance with respect to wavelength in FIG. I try to give it some characteristics.
したがって第３図に示すように構成された受光素子にあ
っては、結果的に第６図に示すような総合感度特性を有
することになり、それに光Ｐが照射されると半導体層１
０２によって設定波長λＣよりも長波長側の波長をもっ
た光のみがろ波され、そのろ波された光が光起電層１０
１に入ってそこで設定波長λ０よりも短波長側の波長を
もった光のみがセンシングされ、一定の波長帯域（λＣ
〜λ０）にある光のみが選択的に検知されることになる
。Therefore, the light-receiving element configured as shown in FIG. 3 will have the overall sensitivity characteristics as shown in FIG.
02, only light having a wavelength on the longer wavelength side than the set wavelength λC is filtered, and the filtered light is transmitted to the photovoltaic layer 10.
1, only light with wavelengths shorter than the set wavelength λ0 is sensed, and a certain wavelength band (λC
~λ0) will be selectively detected.
しかして、光起電層１０１の感度特性におけるピーク感
度波長λｐをＯＨ基による光吸収波長λ１゛または非吸
収波長λ２に設定するようにすれば、バッテリ溶液中を
通過した光のうちのλ１まだはλ２構成を選択的に検知
することができるようになる。Therefore, if the peak sensitivity wavelength λp in the sensitivity characteristics of the photovoltaic layer 101 is set to the light absorption wavelength λ1' due to the OH group or the non-absorption wavelength λ2, then λ1 of the light passing through the battery solution can still be can now selectively detect the λ2 configuration.
また、第４図に示すような感度特性をもった普通の受光
素子と第５図に示すような光透過特性をもった光学フィ
ルタとを組み合せるようにしても。Furthermore, an ordinary light receiving element having sensitivity characteristics as shown in FIG. 4 and an optical filter having light transmission characteristics as shown in FIG. 5 may be combined.
第６図に示すような総合感度特性を得ることができる。A comprehensive sensitivity characteristic as shown in FIG. 6 can be obtained.
雅敦
以上１本発明によるバッテリ充電量測定方法にあっては
、バッテリの放電によってバッテリ溶液が化学変化する
際、その放電量に比例してその溶液中で生ずる光吸収作
用に着目し、その光吸収の程度を測定することによって
溶液の反応状態からバッテリ充電量をわり出すようにし
たもので、バッテリの設置環境またはその使用状態など
の影響を受けることなく、常にバッテリの充電量を精度
良く測定することができるという優れた利点を有してい
る。Atsushi Atsushi (1) The method for measuring battery charge according to the present invention focuses on the light absorption effect that occurs in the solution in proportion to the amount of discharge when the battery solution changes chemically due to discharge of the battery. This system calculates the battery charge amount from the reaction state of the solution by measuring the degree of absorption, and can always accurately measure the battery charge amount without being affected by the installation environment of the battery or its usage conditions. It has the great advantage of being able to
第１図は本発明によるバッテリ充電量測定方法を具体的
に実施するための装置の構成例を示すブロック図、第２
図は同構成例における光フィルタの光透過特性を示す図
、第３図は波長選択性をもった特殊な受光素子の構造を
示す図、第４図はその特殊な受光素子における光起電層
の感度特性を示す図、第５図は同じくその半導体層の光
透過時性を示す図、第６図はその特殊な受光素子の総合
的な感度特性を示す図である。
■・・・光源 ２・・・バッテリ溶液 ３１．３２・・
・光学フィルタ ４１．４２・・・受光素子 ５・・・
演算処理回路 １０１・・・光起電ＷＪ １０２・・・
半導体層第１図
λｌ λ２ 波長
第３図
第４図
１ｐ１′ 波長FIG. 1 is a block diagram showing an example of the configuration of a device for specifically implementing the battery charge amount measuring method according to the present invention, and FIG.
The figure shows the light transmission characteristics of the optical filter in the same configuration example, Figure 3 shows the structure of a special light-receiving element with wavelength selectivity, and Figure 4 shows the photovoltaic layer in the special light-receiving element. FIG. 5 is a diagram showing the light transmission characteristics of the semiconductor layer, and FIG. 6 is a diagram showing the overall sensitivity characteristics of the special light-receiving element. ■...Light source 2...Battery solution 31.32...
・Optical filter 41.42... Light receiving element 5...
Arithmetic processing circuit 101... Photovoltaic WJ 102...
Semiconductor layer Figure 1 λl λ2 Wavelength Figure 3 Figure 4 1p1' Wavelength
Claims (1)
る際に、その放電量に比例してバッテリ溶液中で生ずる
光吸収の程度を測定することによってバッテリの充電量
を求めるようにしたバッテリ充電量測定方法。 ２、バッテリ溶液中に生ずるＯＨ基により光吸収される
帯域の波長をもった光をバッテリ溶液中に通したときの
第１の光透過率の低下と、バッテリ溶液の反応によって
は光吸収されることがない帯域にある波長をもった光を
バッテリ溶液中に通したときのバッテリ溶液自体による
第２の光透過率の低下とをそれぞれ検出し、第１の光透
過率の低下と第２の光透過率の低下との比を求めること
によってバッテリ溶液中で生ずる光吸収の程度を測定す
るようにしたことを特徴とする前記第１項の記載による
バッテリ充電量測定方法。 ３、バッテリ溶液中に生ずるＯＨ基により光吸収される
帯域の波長をもった光をバッテリ溶液中に通したときの
第１の光透過率の低下と、バッテリ溶液中に生ずるＳＯ
＿４基により光吸収される帯域の波長をもった光をバッ
テリ溶液中に通したときの第２の光透過率の低下とをそ
れぞれ検出し、第１の光透過率の低下と第２の光透過率
の低下との比を求めることによってバッテリ溶液中で生
ずる光吸収の程度を測定するようにしたことを特徴とす
る前記第１項の記載によるバッテリ充電量測定方法。[Claims] 1. When the battery solution changes chemically due to battery discharge, the amount of charge of the battery is determined by measuring the degree of light absorption that occurs in the battery solution in proportion to the amount of discharge. How to measure battery charge amount. 2. The first decrease in light transmittance when light with a wavelength in the band that is absorbed by the OH groups generated in the battery solution is passed through the battery solution, and the light is absorbed depending on the reaction of the battery solution. A second decrease in light transmittance due to the battery solution itself is detected when light with a wavelength in a non-conventional band is passed through the battery solution, and a second decrease in light transmittance due to the battery solution itself is detected. 2. The method for measuring battery charge amount according to item 1 above, characterized in that the degree of light absorption occurring in the battery solution is measured by determining the ratio to the decrease in light transmittance. 3. Decrease in first light transmittance when light with a wavelength in the band absorbed by OH groups generated in the battery solution is passed through the battery solution, and SO generated in the battery solution.
A decrease in the second light transmittance when light having a wavelength in the band that is absorbed by the four groups is passed through the battery solution is detected, and a decrease in the first light transmittance and a decrease in the second light transmittance are detected. 2. The method for measuring battery charge amount according to item 1 above, characterized in that the degree of light absorption occurring in the battery solution is measured by determining the ratio to the decrease in transmittance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61019837A JP2632306B2 (en) | 1986-01-31 | 1986-01-31 | Battery charge measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61019837A JP2632306B2 (en) | 1986-01-31 | 1986-01-31 | Battery charge measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62177872A true JPS62177872A (en) | 1987-08-04 |
| JP2632306B2 JP2632306B2 (en) | 1997-07-23 |
Family
ID=12010383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61019837A Expired - Fee Related JP2632306B2 (en) | 1986-01-31 | 1986-01-31 | Battery charge measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2632306B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5553878A (en) * | 1978-10-16 | 1980-04-19 | Japan Storage Battery Co Ltd | Electrolyte-concentration detector for lead storage battery |
| JPS57210579A (en) * | 1981-06-22 | 1982-12-24 | Stanley Electric Co Ltd | Displayer for battery residual capacity |
| JPS61273875A (en) * | 1985-05-30 | 1986-12-04 | Furukawa Electric Co Ltd:The | Zinc-chlorine battery |
| JPS62126569A (en) * | 1985-11-27 | 1987-06-08 | Sumitomo Electric Ind Ltd | Measuring equipment for active material concentration in electrolyte and its flow rate |
-
1986
- 1986-01-31 JP JP61019837A patent/JP2632306B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5553878A (en) * | 1978-10-16 | 1980-04-19 | Japan Storage Battery Co Ltd | Electrolyte-concentration detector for lead storage battery |
| JPS57210579A (en) * | 1981-06-22 | 1982-12-24 | Stanley Electric Co Ltd | Displayer for battery residual capacity |
| JPS61273875A (en) * | 1985-05-30 | 1986-12-04 | Furukawa Electric Co Ltd:The | Zinc-chlorine battery |
| JPS62126569A (en) * | 1985-11-27 | 1987-06-08 | Sumitomo Electric Ind Ltd | Measuring equipment for active material concentration in electrolyte and its flow rate |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2632306B2 (en) | 1997-07-23 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |