CA1226900A - Apparatus for monitoring cell capacity in a storage battery - Google Patents
Apparatus for monitoring cell capacity in a storage batteryInfo
- Publication number
- CA1226900A CA1226900A CA000443137A CA443137A CA1226900A CA 1226900 A CA1226900 A CA 1226900A CA 000443137 A CA000443137 A CA 000443137A CA 443137 A CA443137 A CA 443137A CA 1226900 A CA1226900 A CA 1226900A
- Authority
- CA
- Canada
- Prior art keywords
- cell
- battery
- voltage
- cells
- sequencer
- 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.)
- Expired
Links
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
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
-
- 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
Abstract
A B S T R A C T
Apparatus for monitoring the capacity of a battery of series-connected storage cells (10) which are tested by discharging the battery at constant current. The apparatus comprises: sequencer means (30, 40, 50) for cyclically addressing each battery cell in turn, and delivering a single measurement signal (VM) representative of the voltage across the terminals of the cell being addressed; comparator means (60) connected to receive said single measurement signal and to deliver an active output condition when said single measurement signal (VM) is below a threshold value (VREF) representing the end-of-discharge voltage for the cells under test; and timer means (90, 91) responsive to said active output condition to indicate the discharge time of the cell responsible for causing said active output condition to be delivered.
Cyclic operation of the apparatus is interrupted each time a cell is encountered with less than the threshold voltage across its terminals. An operator then takes the discharged cell out of the battery circuit and operates enabling means (58) to cause cyclic testing to continue on the remaining cells. The process may continue until all the cells have been discharged.
Apparatus for monitoring the capacity of a battery of series-connected storage cells (10) which are tested by discharging the battery at constant current. The apparatus comprises: sequencer means (30, 40, 50) for cyclically addressing each battery cell in turn, and delivering a single measurement signal (VM) representative of the voltage across the terminals of the cell being addressed; comparator means (60) connected to receive said single measurement signal and to deliver an active output condition when said single measurement signal (VM) is below a threshold value (VREF) representing the end-of-discharge voltage for the cells under test; and timer means (90, 91) responsive to said active output condition to indicate the discharge time of the cell responsible for causing said active output condition to be delivered.
Cyclic operation of the apparatus is interrupted each time a cell is encountered with less than the threshold voltage across its terminals. An operator then takes the discharged cell out of the battery circuit and operates enabling means (58) to cause cyclic testing to continue on the remaining cells. The process may continue until all the cells have been discharged.
Description
I
APPARATUS FOR MONITORING CELL CAPACIlmY IN A Sly trudge the present invention relates to apparatus for monitoring cell capacity in a storage battery, and in particular in storage batteries installed in electricity distribution stations.
BACKGROUND OF me IlrVEN~ION
Regulations in force require that the capacity of such batteries be periodically verified. This verification is performed by continuously discharging the battery through rheostat connected across its terminals in order to Keep the discharge current to a constant value.
As soon as the voltage across any individual cell drops below a given tnre~hold, that cell is disconnected from the battery and is no longer discharged Discharging continues for the rest of the battery, with the current being kept to the same constant glue.
Each time a cell is disconnected, the tire it too to discharge is noted. Given that both the time to discharge and the constant discharge current are know for each cell, it is possible to calculate the quantity of electricity given Buick by each cell, to. its capacity.
However, the actual procedure is tedious and dangerous.
It is tedious since the operator must continuously measure the cell voltages using a voltmeter throughout the entire period of discharge. A discharge cycle lasts for a long time (about 5 to 10 hour), and the number of cells to be individually tested is high (for example, commonly used batteries in the electricity power supply industry are I volt batteries and 127 volt batteries, comprising 24 and 58 cells respectively).
The procedure is also dangerous in that the operator it continually working on apparatus having a dangerous voltage across its end terminals (erg. 48 or 127 volts) and must thus perform the test measurements while wearing protective loves.
Preferred embodiments of the present invention avoid the need for manual test measurements by warning an operator each time an individual cell has been discharged, to. that the voltage across its ~arminal~ ha dropped below a predetermined threshold. rye operator my then stop ~ischarglng. Apparatus C~Jj~3 in accordance with the invention may also indicate "hick cell is discharged together loath the time elapse since d screened organ. Lmhe operator can then readily disconnect tune cell it question, note the corresponding discharge tire, and cause discharging to continue until the apparatus detects that another cell has been discharged.
he cycle evntinues in this manner until the last battery cell his bee lo harped.
SUMMARY OF Lo rVENTION
The present invention provides apparatus for monitoring the capacity of a battery of series-connevted storage cells, said battery blind discharged at constant current when under test, the improvement wherein the apparatus comprises:
sequencer means for cyclically addressi~l~ each battery --:
cell in turn, said sequencer means being suitable for delivering a single measurement signal (VIM) representative of the voltage across the terminals of the cell being addressed;
comparator leans connected to receive said single measurement signal and to deliver an active output condition when sail Cyril measllrement signal (VIM) is blow a threshold value VIE representing the end-of-dischar~e voltage for the cells under test; end timer means responsive to said active output condition being delivered by said comparator means to indicate the 25 discharge time of the cell responsible for causing said active -I
output condition to be delivered.
The apparatus may also include:
inhibit means for ~llsl)endin~ cyclic operation ox the sequencer means when the comparator means detect a voltage below the threshold;
indicator means to indicate which cell is being addressed by the sequencer mean; -enabling means for enabling cyclic operation to restart after being inhibited by the inhibit means.
. ROUGH D3~CRIPlIOI~i I I DRAWING
An embodiment of the invention is described by way of example it reference to the sole flg~lre ox toe ac~omp~nyin&
drawing w`nie`n is circuit Durham.
IRE DWIGHT D Do Cripple A bakery to by verified cornprib~e3 a plurality of individual cells 10 connected in series, Whitehall the battery as a Rowley being connectable via a normally open switch 21 to discharge through a rheostat I An meter 22 indicates the value of the discharge current Ann is used to keep this value constant.
By way of example, tune battery may be supposed to comprise 58 cells connected in series; giving a nominal tension of 127 volts. Each cell gives a nominal 2.2 volts and is considered to be discharged Ryan the voltage across its terminals drops to a threshold value of 1.8 volts.
A 127 volt battery having a capacity of 100 Ah has a discharge time of about 5 h at a constant current of 20 amp.
A sequencer circuit comprises a rink counter 30 having a clock input 31 connected to receive pulses from a clock circuit 80, which delivers one pulse every 24 milliseconds, for example.
The outputs 32 from the ring counter are activated cyclically and successively. Each of the 01ltpUtS 32 it connected to a respective control circuit 40 comprising a relay 41 controlled by a transistor 42.
The relays provide galvanic isolation between the control circuits 40 and respective measuring circuits 50. A measuring circuit 50 is connected across the terminals 11, 12 of each cell 10. First and second normally open contacts 51 and 52 of the corresponlin~ relay 40 connect the terminals ox each cell when it is addressed by tune sequencer circuit I to a common bus 61 which is connected to the inverting input of a comparator circuit 60.
Further, each time a relay 41 is activated, an associated 3 light emitting diode (ID) 43 connected across the terminals of the relay is turned on. The particular I eying addressed by the sequencer at arty moment to. the cell on which a test measurement is being performed, is thus indicated by the corresponding LED emitting ht.
The voltage Vî present on it Gus 61 is thus a multiplexed volt '~J}liC'.'. is representative of the voltage Crusoe the terminals of earn ." thy en in tllrn.
I
The other, non-inverting input 62 of the comparator 60 is maintained at a constant reference voltage VREF representative of the threshold voltage corresponding to an individual cell being discharged (to. 1.8 volts in the present example).
The reference voltage is obtained from a power supply voltage V by means of an integrated voltage regulator 63 which is wettable by means of an adjustable resistance I
A capacitor 65 connected between the inverting input to the comparator 60 and ground acts as a short term memory for avoiding sharp changes in the multiplexed voltage each time the sequencer circuit advances one step.
The output from the comparator 60 (which goes active when the voltage across cell under test is less than the threshold voltage) controls a circuit 70 via a monostable 100.
The circuit 70 includes a relay 71 which is connected to actuate an alarm 72 for warning an operator, who can then open the switch 21, and thus turn off battery discharge. The output from the comparator 60 is also applied in the circuit 70 to a first input of a series connection of two RAND gates 73 and 74.
The appearance of the active condition at the output from -the comparator 60 has the effect of interrupting the clock pulses coming from the clock circuit 80. The rink counter 30 which is driven by these pulses is thus stopper The relay 71 also stops operation of a timer 90, thereby stopping its output display on a value indicative of the discharge time elapsed since the beginning of the discharge test.
Finally, each measuring circuit 50 includes a switch 58 to enable the operator to switch in a positive DC voltage V which is greater than the threshold voltage Jo replace the cell voltage when a cell is taken out of circuit.
The apparatus operates as follows: initially all the cells 10 are connected in sexiest and the battery is discharged via the rheostat 20 which the operator adjusts to obtain a constant discharge current. The relays 41 are successively activated by the sequencer 30, and so long as none ox the cell voltages drops below the threshold voltage, the comparator 60 does not produce an active condition at its output. The NOD gates 73 and 74 remain open and the timer continues to operate.
I
When the voltage across one of tune cells drops below the, predetermined threshold the output from tile comparator assumes an active condition, thereby interrupting the transmission of clock pulses frown the clock 80 and thus stopping the sequencer 30. At the save time the relay 71 is actuated thereby triggering the alarm 72 and stopping the timer 90.
he operator then opens the switch 21 to stow di3cnar~ir.g and observes which one of the Teds 57 is emitting ,ignt, indicating which cell hue one discharged. the operator then disconnect the discharged cell, reconnects the remaining cells in series, and to restart the test closes the corresponding switch 58, thereby applying a permanent vowel above the threshold for forwarding to the comparator whenever tune t1i3connected cell is subsequent addressed by the sequencer 30.
The effect of disactivating the below-threshold voltage by means of tune switch 58 is to stop the alarm 72, to restart the timer 90, and to restart cyclic operation of the sequencer I
(because the gates I and 74 are reopened).
The operator then manually recluses the switch 21 and resets the rheostat so that discharging continues at its previous constant current.
The cells remaining in circuit are then cyclically scanned until another cell voltage clips below the discharge thyroid.
It will be observed that the measurement circuit 50 corresponding to the previously disconnected cell does not interfere with the cyclic scanning, singe the voltage applied via tune switch 58 in place of the disconnected cell voltage is above the threshold voltage.
JO
APPARATUS FOR MONITORING CELL CAPACIlmY IN A Sly trudge the present invention relates to apparatus for monitoring cell capacity in a storage battery, and in particular in storage batteries installed in electricity distribution stations.
BACKGROUND OF me IlrVEN~ION
Regulations in force require that the capacity of such batteries be periodically verified. This verification is performed by continuously discharging the battery through rheostat connected across its terminals in order to Keep the discharge current to a constant value.
As soon as the voltage across any individual cell drops below a given tnre~hold, that cell is disconnected from the battery and is no longer discharged Discharging continues for the rest of the battery, with the current being kept to the same constant glue.
Each time a cell is disconnected, the tire it too to discharge is noted. Given that both the time to discharge and the constant discharge current are know for each cell, it is possible to calculate the quantity of electricity given Buick by each cell, to. its capacity.
However, the actual procedure is tedious and dangerous.
It is tedious since the operator must continuously measure the cell voltages using a voltmeter throughout the entire period of discharge. A discharge cycle lasts for a long time (about 5 to 10 hour), and the number of cells to be individually tested is high (for example, commonly used batteries in the electricity power supply industry are I volt batteries and 127 volt batteries, comprising 24 and 58 cells respectively).
The procedure is also dangerous in that the operator it continually working on apparatus having a dangerous voltage across its end terminals (erg. 48 or 127 volts) and must thus perform the test measurements while wearing protective loves.
Preferred embodiments of the present invention avoid the need for manual test measurements by warning an operator each time an individual cell has been discharged, to. that the voltage across its ~arminal~ ha dropped below a predetermined threshold. rye operator my then stop ~ischarglng. Apparatus C~Jj~3 in accordance with the invention may also indicate "hick cell is discharged together loath the time elapse since d screened organ. Lmhe operator can then readily disconnect tune cell it question, note the corresponding discharge tire, and cause discharging to continue until the apparatus detects that another cell has been discharged.
he cycle evntinues in this manner until the last battery cell his bee lo harped.
SUMMARY OF Lo rVENTION
The present invention provides apparatus for monitoring the capacity of a battery of series-connevted storage cells, said battery blind discharged at constant current when under test, the improvement wherein the apparatus comprises:
sequencer means for cyclically addressi~l~ each battery --:
cell in turn, said sequencer means being suitable for delivering a single measurement signal (VIM) representative of the voltage across the terminals of the cell being addressed;
comparator leans connected to receive said single measurement signal and to deliver an active output condition when sail Cyril measllrement signal (VIM) is blow a threshold value VIE representing the end-of-dischar~e voltage for the cells under test; end timer means responsive to said active output condition being delivered by said comparator means to indicate the 25 discharge time of the cell responsible for causing said active -I
output condition to be delivered.
The apparatus may also include:
inhibit means for ~llsl)endin~ cyclic operation ox the sequencer means when the comparator means detect a voltage below the threshold;
indicator means to indicate which cell is being addressed by the sequencer mean; -enabling means for enabling cyclic operation to restart after being inhibited by the inhibit means.
. ROUGH D3~CRIPlIOI~i I I DRAWING
An embodiment of the invention is described by way of example it reference to the sole flg~lre ox toe ac~omp~nyin&
drawing w`nie`n is circuit Durham.
IRE DWIGHT D Do Cripple A bakery to by verified cornprib~e3 a plurality of individual cells 10 connected in series, Whitehall the battery as a Rowley being connectable via a normally open switch 21 to discharge through a rheostat I An meter 22 indicates the value of the discharge current Ann is used to keep this value constant.
By way of example, tune battery may be supposed to comprise 58 cells connected in series; giving a nominal tension of 127 volts. Each cell gives a nominal 2.2 volts and is considered to be discharged Ryan the voltage across its terminals drops to a threshold value of 1.8 volts.
A 127 volt battery having a capacity of 100 Ah has a discharge time of about 5 h at a constant current of 20 amp.
A sequencer circuit comprises a rink counter 30 having a clock input 31 connected to receive pulses from a clock circuit 80, which delivers one pulse every 24 milliseconds, for example.
The outputs 32 from the ring counter are activated cyclically and successively. Each of the 01ltpUtS 32 it connected to a respective control circuit 40 comprising a relay 41 controlled by a transistor 42.
The relays provide galvanic isolation between the control circuits 40 and respective measuring circuits 50. A measuring circuit 50 is connected across the terminals 11, 12 of each cell 10. First and second normally open contacts 51 and 52 of the corresponlin~ relay 40 connect the terminals ox each cell when it is addressed by tune sequencer circuit I to a common bus 61 which is connected to the inverting input of a comparator circuit 60.
Further, each time a relay 41 is activated, an associated 3 light emitting diode (ID) 43 connected across the terminals of the relay is turned on. The particular I eying addressed by the sequencer at arty moment to. the cell on which a test measurement is being performed, is thus indicated by the corresponding LED emitting ht.
The voltage Vî present on it Gus 61 is thus a multiplexed volt '~J}liC'.'. is representative of the voltage Crusoe the terminals of earn ." thy en in tllrn.
I
The other, non-inverting input 62 of the comparator 60 is maintained at a constant reference voltage VREF representative of the threshold voltage corresponding to an individual cell being discharged (to. 1.8 volts in the present example).
The reference voltage is obtained from a power supply voltage V by means of an integrated voltage regulator 63 which is wettable by means of an adjustable resistance I
A capacitor 65 connected between the inverting input to the comparator 60 and ground acts as a short term memory for avoiding sharp changes in the multiplexed voltage each time the sequencer circuit advances one step.
The output from the comparator 60 (which goes active when the voltage across cell under test is less than the threshold voltage) controls a circuit 70 via a monostable 100.
The circuit 70 includes a relay 71 which is connected to actuate an alarm 72 for warning an operator, who can then open the switch 21, and thus turn off battery discharge. The output from the comparator 60 is also applied in the circuit 70 to a first input of a series connection of two RAND gates 73 and 74.
The appearance of the active condition at the output from -the comparator 60 has the effect of interrupting the clock pulses coming from the clock circuit 80. The rink counter 30 which is driven by these pulses is thus stopper The relay 71 also stops operation of a timer 90, thereby stopping its output display on a value indicative of the discharge time elapsed since the beginning of the discharge test.
Finally, each measuring circuit 50 includes a switch 58 to enable the operator to switch in a positive DC voltage V which is greater than the threshold voltage Jo replace the cell voltage when a cell is taken out of circuit.
The apparatus operates as follows: initially all the cells 10 are connected in sexiest and the battery is discharged via the rheostat 20 which the operator adjusts to obtain a constant discharge current. The relays 41 are successively activated by the sequencer 30, and so long as none ox the cell voltages drops below the threshold voltage, the comparator 60 does not produce an active condition at its output. The NOD gates 73 and 74 remain open and the timer continues to operate.
I
When the voltage across one of tune cells drops below the, predetermined threshold the output from tile comparator assumes an active condition, thereby interrupting the transmission of clock pulses frown the clock 80 and thus stopping the sequencer 30. At the save time the relay 71 is actuated thereby triggering the alarm 72 and stopping the timer 90.
he operator then opens the switch 21 to stow di3cnar~ir.g and observes which one of the Teds 57 is emitting ,ignt, indicating which cell hue one discharged. the operator then disconnect the discharged cell, reconnects the remaining cells in series, and to restart the test closes the corresponding switch 58, thereby applying a permanent vowel above the threshold for forwarding to the comparator whenever tune t1i3connected cell is subsequent addressed by the sequencer 30.
The effect of disactivating the below-threshold voltage by means of tune switch 58 is to stop the alarm 72, to restart the timer 90, and to restart cyclic operation of the sequencer I
(because the gates I and 74 are reopened).
The operator then manually recluses the switch 21 and resets the rheostat so that discharging continues at its previous constant current.
The cells remaining in circuit are then cyclically scanned until another cell voltage clips below the discharge thyroid.
It will be observed that the measurement circuit 50 corresponding to the previously disconnected cell does not interfere with the cyclic scanning, singe the voltage applied via tune switch 58 in place of the disconnected cell voltage is above the threshold voltage.
JO
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for monitoring the capacity of a battery of series-connected storage cells, said battery being discharged at constant current when under test, and cells of said battery being successively disconnected from said battery when the voltage across the corresponding cell drops below a predetermined threshold, the discharging further continuing for the rest of the battery with the current being kept to the same constant value, comprising:
(a) sequencer means for cyclically addressing each battery cell in turn, said sequencer means being suitable for delivering a single measurement signal representative of the voltage across terminals of the cell being addressed;
(b) comparator means connected to receive said single measurement signal and to deliver an active output condition when said single measurement signal is below a threshold value representing end-of-discharge voltage for the cells under test;
(c) inhibiting means for suspending operation of said sequencer means while said comparator means are delivering said active output condition;
(d) timer means responsive to said active output condition being delivered by said comparator means to indicate the discharge time of the cell responsible for causing said active output condition to be delivered; and (e) enabling means for disabling said inhibiting means, so as to enable said sequencer means to restart operation after said operation has been suspended by said inhibiting means and said responsible cell has been disconnected from said battery.
(a) sequencer means for cyclically addressing each battery cell in turn, said sequencer means being suitable for delivering a single measurement signal representative of the voltage across terminals of the cell being addressed;
(b) comparator means connected to receive said single measurement signal and to deliver an active output condition when said single measurement signal is below a threshold value representing end-of-discharge voltage for the cells under test;
(c) inhibiting means for suspending operation of said sequencer means while said comparator means are delivering said active output condition;
(d) timer means responsive to said active output condition being delivered by said comparator means to indicate the discharge time of the cell responsible for causing said active output condition to be delivered; and (e) enabling means for disabling said inhibiting means, so as to enable said sequencer means to restart operation after said operation has been suspended by said inhibiting means and said responsible cell has been disconnected from said battery.
2. The apparatus according to Claim 1, further comprising indicator means for indicating which one of said cells is being addressed by said sequencer means.
3. The apparatus according to Claim 1, said enabling means comprising means for substituting a permanent voltage greater than said threshold voltage in place of the voltage measured across the terminals of the discharged cell.
4. The apparatus according to Claim 1, wherein said sequencer means include a series of relays which are cyclically actuated to connect the terminals of respective corresponding cells to input terminals of said comparator means for receiving said single measurement signal.
5. The apparatus according to Claim 4, further comprising indicator means for indicating which one of said cells is being addressed by said sequencer means wherein each of said relays is associated with a respective indicator lamp, wherein said lamp is connected in such a manner as to be turned on at the same time as the corresponding relay is actuated.
6. The apparatus according to Claim 1, wherein said sequencer means include a ring counter driven by clock pulses from a clock circuit.
7. The apparatus according to Claim 6, further comprising inhibiting means for suspending operation of said sequencer means by interrupting the application of said clock pulses thereto.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8220859 | 1982-12-13 | ||
| FR8220859A FR2537785A1 (en) | 1982-12-13 | 1982-12-13 | DEVICE FOR CONTROLLING THE CAPACITY OF A BATTERY OF ACCUMULATOR ELEMENTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1226900A true CA1226900A (en) | 1987-09-15 |
Family
ID=9280034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000443137A Expired CA1226900A (en) | 1982-12-13 | 1983-12-13 | Apparatus for monitoring cell capacity in a storage battery |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4590430A (en) |
| EP (1) | EP0112242B1 (en) |
| JP (1) | JPS59132379A (en) |
| CA (1) | CA1226900A (en) |
| DE (1) | DE3365726D1 (en) |
| FR (1) | FR2537785A1 (en) |
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| DE3702591A1 (en) * | 1987-01-29 | 1988-08-11 | Sonnenschein Accumulatoren | CIRCUIT TO CONTINUOUSLY CHECK THE QUALITY OF A MULTI-CELL BATTERY |
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| DE3940929C1 (en) * | 1989-12-12 | 1991-05-08 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | |
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| EP1333294B1 (en) * | 2002-01-31 | 2010-04-21 | Saft Groupe Sa | Discharge control method for a battery |
| JP4179205B2 (en) * | 2004-03-29 | 2008-11-12 | サンケン電気株式会社 | Voltage measuring device |
| US7825627B2 (en) * | 2006-07-17 | 2010-11-02 | O2Micro International Limited | Monitoring battery cell voltage |
| TW200845461A (en) * | 2007-05-04 | 2008-11-16 | Iwei Technology Co Ltd | Recharging apparatus with battery capacity analyzing function |
| US9285429B2 (en) | 2011-02-21 | 2016-03-15 | Telefonaktiebolaget L M Ericsson (Publ) | Arrangement and method for determining the state of a battery based on a capacity of the battery |
| CN102275524A (en) * | 2011-06-30 | 2011-12-14 | 奇瑞汽车股份有限公司 | Diagnostic system and diagnostic method for power battery packs |
| DE102014219582A1 (en) * | 2014-09-26 | 2016-03-31 | Younicos Ag | Method for measuring or checking the performance of accumulators |
| DE102017208770B4 (en) * | 2017-05-23 | 2019-03-28 | Audi Ag | Method for checking a battery condition and tester for checking a battery condition |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2621231A (en) * | 1948-06-22 | 1952-12-09 | Fox Prod Co | Apparatus for testing batteries |
| US3487295A (en) * | 1968-01-08 | 1969-12-30 | Westinghouse Electric Corp | Static battery monitor and voltage reference level switch therefor |
| US3586962A (en) * | 1969-02-28 | 1971-06-22 | Edward C Rebstock | Battery cell monitoring apparatus |
| US3786343A (en) * | 1973-03-19 | 1974-01-15 | Us Navy | Battery monitor system |
| AT331357B (en) * | 1974-01-11 | 1976-08-25 | Jungfer Akkumulatoren | ELECTRICAL DISPLAY DEVICE FOR THE CHARGE STATE OF A SECONDARY BATTERY |
| US3942104A (en) * | 1974-05-03 | 1976-03-02 | Engelhard Minerals & Chemicals Corporation | Cell balance detector for electrolytic cell assemblies |
| FR2315776A1 (en) * | 1975-06-24 | 1977-01-21 | Europ Accumulateurs | METHOD AND DEVICE FOR CONTROL OF AN ACCUMULATOR BATTERY |
| DE2842817B1 (en) * | 1978-09-30 | 1979-05-17 | Siemens Ag | Determination of the state of charge of a battery |
| US4352067A (en) * | 1980-06-02 | 1982-09-28 | Dc Electronic Industries, Inc. | Battery analyzer |
| US4280097A (en) * | 1980-07-14 | 1981-07-21 | The United States Of America As Represented By The Secretary Of The Navy | Isolated DC voltage monitoring system |
| GB2086060B (en) * | 1980-10-11 | 1984-06-13 | Lucas Industries Ltd | Battery monitoring system |
| US4484140A (en) * | 1982-04-23 | 1984-11-20 | The United States Of America As Represented By The Secretary Of The Navy | Battery scanning system |
-
1982
- 1982-12-13 FR FR8220859A patent/FR2537785A1/en active Granted
-
1983
- 1983-12-06 DE DE8383402361T patent/DE3365726D1/en not_active Expired
- 1983-12-06 EP EP83402361A patent/EP0112242B1/en not_active Expired
- 1983-12-07 US US06/558,792 patent/US4590430A/en not_active Expired - Lifetime
- 1983-12-13 CA CA000443137A patent/CA1226900A/en not_active Expired
- 1983-12-13 JP JP58233775A patent/JPS59132379A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US4590430A (en) | 1986-05-20 |
| EP0112242A1 (en) | 1984-06-27 |
| JPS59132379A (en) | 1984-07-30 |
| DE3365726D1 (en) | 1986-10-02 |
| FR2537785A1 (en) | 1984-06-15 |
| FR2537785B1 (en) | 1985-05-03 |
| EP0112242B1 (en) | 1986-08-27 |
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