CA2448277A1 - Self-diagnosis system for an energy storage device - Google Patents
Self-diagnosis system for an energy storage device Download PDFInfo
- Publication number
- CA2448277A1 CA2448277A1 CA002448277A CA2448277A CA2448277A1 CA 2448277 A1 CA2448277 A1 CA 2448277A1 CA 002448277 A CA002448277 A CA 002448277A CA 2448277 A CA2448277 A CA 2448277A CA 2448277 A1 CA2448277 A1 CA 2448277A1
- Authority
- CA
- Canada
- Prior art keywords
- storage device
- energy storage
- cell
- voltage
- internal resistance
- 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
- 238000004146 energy storage Methods 0.000 title claims abstract 46
- 238000004092 self-diagnosis Methods 0.000 title claims abstract 20
- 238000005259 measurement Methods 0.000 claims 11
- 230000006870 function Effects 0.000 claims 3
- 238000012544 monitoring process Methods 0.000 claims 3
- 239000003792 electrolyte Substances 0.000 claims 2
- 238000000034 method Methods 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- 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
-
- 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]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Power Engineering (AREA)
- Secondary Cells (AREA)
Abstract
A self-diagnosis system for an energy storage device, the latter including a plurality of electrochemical cells connected in series or parallel to form a cell string.
The self-diagnosis system correlates a state of health of the battery based on the internal resistance value of each electrochemical cell of the energy storage device and determines a corresponding battery initial capacity which enables the self-diagnosis system to evaluate the exact capacity of the battery at any given time.
The self-diagnosis system correlates a state of health of the battery based on the internal resistance value of each electrochemical cell of the energy storage device and determines a corresponding battery initial capacity which enables the self-diagnosis system to evaluate the exact capacity of the battery at any given time.
Claims (20)
1- A self-diagnosis system for an energy storage device, the energy storage device including a plurality of electrochemical cells forming a cell string, said system comprising:
a. a current source providing a constant current;
b. a cell selector switch operative to select a particular one of the electrochemical cells within the cell string;
c. a voltage measurement means for measuring an initial voltage and a second voltage of said particular cell;
d. a processing unit coupled to said voltage measurement means, said processing unit operative to calculate an internal resistance of said particular cell on a basis of the constant current value and the initial and second voltages;
e. said electronic self diagnosis system capable to determine a state of health of said energy storage device on the basis of the internal resistance of each cell of said cell string.
a. a current source providing a constant current;
b. a cell selector switch operative to select a particular one of the electrochemical cells within the cell string;
c. a voltage measurement means for measuring an initial voltage and a second voltage of said particular cell;
d. a processing unit coupled to said voltage measurement means, said processing unit operative to calculate an internal resistance of said particular cell on a basis of the constant current value and the initial and second voltages;
e. said electronic self diagnosis system capable to determine a state of health of said energy storage device on the basis of the internal resistance of each cell of said cell string.
2- A system as defined in claim 1, wherein said processing unit includes a memory for storing data representative of electrochemical cell capacity fade as a function of internal resistance, said processing unit correlating the highest calculated internal resistance of the cell string to a corresponding state of health value stored in said memory to define an overall state of health of said energy storage device.
3- An energy storage device comprising a housing, a plurality of electrochemical cells each having a positive, a negative electrode and an electrolyte separator therebetween; said plurality of electrochemical cells connected in series or parallel to form a cell string within said housing; and an electronic self-diagnosis system comprising a processing unit, a current source, a voltage measurement means, a cell selector switch adapted to select a single electrochemical cell within said cell string; said electronic self-diagnosis system measuring an internal resistance of each cell of said cell string, one cell at a time, to determine a state of health of said energy storage device; wherein said cell selector switch selects a first cell of said cell string, said voltage measurement means measures an initial voltage and a second voltage of said selected cell, said current source provides a constant current; the constant current value, the initial and second voltage measurement being processed by said processing unit wherein said processing unit calculates the internal resistance of said selected cell using on Ohm's law, said processing unit further comprising a memory for storing electrochemical cell's capacity fade as a function of its internal resistance, said processing unit correlating the highest calculated internal resistance of said cell string to a corresponding state of health value stored in said memory to define an overall state of health of said energy storage device.
4- An energy storage device as defined in claim 3 wherein said current source provides a small charge at constant current to said selected cell.
5- An energy storage device as defined in claim 4 wherein a resulting increase in voltage of said selected cell is measured at a predetermined time after said small charge at constant current is applied.
6- An energy storage device as defined in claim 4 wherein after said small charge at constant current, a voltage relaxation occurs and provokes a drop in voltage within said selected cell, wherein said voltage drop is measured by said voltage measurement means at a predetermined time for calculation of the internal resistance of said selected cell.
7- An energy storage device as defined in claim 3 wherein said current source provides a small discharge of said selected cell at constant current.
8- An energy storage device as defined in claim 7 wherein a resulting decrease in voltage of said selected cell is measured at a predetermined time after said small discharge at constant current is applied.
9- An energy storage device as defined in claim 7 wherein after said small discharge at constant current, a voltage relaxation occurs and provokes a bump in voltage within said selected cell, wherein said voltage bump is measured by said voltage measurement means at a predetermined time for calculation of the internal resistance of said selected cell.
10-An energy storage device as defined in claim 3 ,wherein said electronic self diagnosis system further comprises an external link through which said extrapolated overall state of health may be transferred to a remote monitoring system and through which data or commands may be received from a remote system.
11-An energy storage device as defined in claim 3 wherein said processing unit selects from said memory an initial capacity corresponding to said overall state of health of said energy storage device, said processing unit determines a state of charge of said energy storage device by measuring energy flowing in or out of said energy storage device and adding or subtracting said energy from said state of charge to determine an exact capacity of said energy storage device.
12- An energy storage device as defined in claim 11 wherein said energy flowing in is calculated as a current drawn from said energy storage device over time during a discharge, said energy flowing out is calculated as a current received by said energy storage device over time during a charge, said measured energy representative of the area under a corresponding discharge curve.
13- An energy storage device as defined in claim 12 wherein said processing unit evaluates a remaining time the energy storage device can provide energy based on said corresponding discharge curve for a measured instantaneous rate of discharge.
14- An energy storage device as defined in claim 3 wherein said electronic self-diagnosis system further comprises a cell selector sequencer, a current source processor, a bi-directional current source, a voltage cell signal processor, a current signal processor, and an A/D signal conversion unit adapted to transform analog signals into readable digital signals for processing unit.
15- An energy storage device as defined in claim 7 wherein said small discharge is routed into an application to which said energy storage device is connected to reduce energy waste by internal resistance measurements.
16- An energy storage device comprising a housing, a plurality of electrochemical cells each having a positive, a negative electrode and an electrolyte separator therebetween; said plurality of electrochemical cells connected in series or parallel to form a cell string within said housing; and an electronic self-diagnosis system; said electronic self-diagnosis system correlating a measured internal resistance of said cell string to a state of health value representative of a capacity fade of said cell string; said electronic self-diagnosis system selecting an initial capacity of said energy storage device corresponding to said state of health value; said electronic self-diagnosis system monitoring a state of charge of said energy storage device by measuring energy flowing in or out of said energy storage device and adding or subtracting said energy to determine an exact battery capacity.
17- An energy storage device as defined in claim 16 wherein said energy flowing in is calculated as a current drawn from said energy storage device over time during a discharge, said energy flowing out is calculated as a current received by said energy storage device over time during a charge, said measured energy representative of the area under a corresponding discharge curve.
18- An energy storage device as defined in claim 17 wherein said electronic self-diagnosis system measures said internal resistance of each electrochemical cells of said cell string, one cell at a time, by selecting a first cell of said cell string, measuring an initial voltage and a second voltage for a constant current the constant current value, the initial and second voltage measurement being processed by said electronic self-diagnosis system wherein said electronic self-diagnosis system calculates the internal resistance of said selected cell using on Ohm's law, said electronic self-diagnosis system further comprising a memory for storing electrochemical cell's capacity fade as a function of its internal resistance, said electronic self-diagnosis system correlating the highest calculated internal resistance of said cell string to a corresponding state of health value stored in said memory to define an overall state of health of said energy storage device.
19- An energy storage device as defined in claim 18 wherein said electronic self-diagnosis system comprises a processing unit, a current source, a voltage measurement means, a cell selector switch adapted to select a single electrochemical cell within said cell string and a current measurement means.
20- A method for determining a state of health of an energy storage device, the energy storage device including a plurality of electrochemical cells forming a cell string, the energy storage device characterized by a state of health value representative of a capacity fade of the cell string, said method comprising:
a. correlating a measured internal resistance of the cell string to the state of health value;
b. selecting an initial capacity of the energy storage device corresponding to the state of health value c. monitoring a state of charge of the energy storage device by measuring energy flowing in or out of said energy storage device and adding or subtracting the energy to determine an exact battery capacity.
a. correlating a measured internal resistance of the cell string to the state of health value;
b. selecting an initial capacity of the energy storage device corresponding to the state of health value c. monitoring a state of charge of the energy storage device by measuring energy flowing in or out of said energy storage device and adding or subtracting the energy to determine an exact battery capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2448277A CA2448277C (en) | 2001-05-25 | 2002-05-24 | Self-diagnosis system for an energy storage device |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2,348,586 | 2001-05-25 | ||
| CA002348586A CA2348586A1 (en) | 2001-05-25 | 2001-05-25 | Power management system |
| PCT/CA2002/000767 WO2002097456A2 (en) | 2001-05-25 | 2002-05-24 | Self-diagnosis system for an energy storage device |
| CA2448277A CA2448277C (en) | 2001-05-25 | 2002-05-24 | Self-diagnosis system for an energy storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2448277A1 true CA2448277A1 (en) | 2002-12-05 |
| CA2448277C CA2448277C (en) | 2011-02-08 |
Family
ID=31189151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2448277A Expired - Lifetime CA2448277C (en) | 2001-05-25 | 2002-05-24 | Self-diagnosis system for an energy storage device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2448277C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012172030A1 (en) * | 2011-06-15 | 2012-12-20 | Compagnie Generale Des Etablissements Michelin | Device for monitoring an electrical accumulation battery and associated method |
| EP2629109A1 (en) * | 2010-10-14 | 2013-08-21 | Toyota Jidosha Kabushiki Kaisha | Diagnostic device for electrical storage devices, diagnosis method, and electrical storage device |
| EP2339361A3 (en) * | 2009-12-25 | 2015-02-11 | Kabushiki Kaisha Toshiba | Battery diagnosis device and method |
| FR3009754A1 (en) * | 2013-08-16 | 2015-02-20 | Renault Sa | DIAGNOSIS OF THE INTERNAL RESISTANCE OF AN ELECTRIC BATTERY |
| FR3013903A1 (en) * | 2013-11-28 | 2015-05-29 | Peugeot Citroen Automobiles Sa | DEVICE FOR DIAGNOSING THE HEALTH STATUS OF ELECTRIC ENERGY STORAGE MEANS COUPLED TO AN ELECTRIC POWER PRODUCER, AND ASSOCIATED CONTROL DEVICE |
| CN112018848A (en) * | 2020-08-27 | 2020-12-01 | Oppo广东移动通信有限公司 | Charging control method and device, terminal and computer readable storage medium |
| EP4092805A4 (en) * | 2020-01-17 | 2024-04-10 | Hioki E.E. Corporation | Device, measurement device, method, and measurement method |
-
2002
- 2002-05-24 CA CA2448277A patent/CA2448277C/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2339361A3 (en) * | 2009-12-25 | 2015-02-11 | Kabushiki Kaisha Toshiba | Battery diagnosis device and method |
| EP2629109A1 (en) * | 2010-10-14 | 2013-08-21 | Toyota Jidosha Kabushiki Kaisha | Diagnostic device for electrical storage devices, diagnosis method, and electrical storage device |
| EP2629109A4 (en) * | 2010-10-14 | 2014-12-10 | Toyota Motor Co Ltd | DIAGNOSTIC DEVICE FOR ELECTRICAL STORAGE DEVICES, DIAGNOSTIC PROCEDURES AND ELECTRICAL STORAGE DEVICE |
| US10012700B2 (en) | 2010-10-14 | 2018-07-03 | Toyota Jidosha Kabushiki Kaisha | Electric storage apparatus |
| WO2012172030A1 (en) * | 2011-06-15 | 2012-12-20 | Compagnie Generale Des Etablissements Michelin | Device for monitoring an electrical accumulation battery and associated method |
| FR2976676A1 (en) * | 2011-06-15 | 2012-12-21 | Michelin Soc Tech | DEVICE FOR MONITORING AN ELECTRIC ACCUMULATION BATTERY AND ASSOCIATED METHOD |
| US9865902B2 (en) | 2011-06-15 | 2018-01-09 | Compagnie Generale Des Etablissements Michelin | Device for monitoring an electrical accumulation battery and associated method |
| FR3009754A1 (en) * | 2013-08-16 | 2015-02-20 | Renault Sa | DIAGNOSIS OF THE INTERNAL RESISTANCE OF AN ELECTRIC BATTERY |
| FR3013903A1 (en) * | 2013-11-28 | 2015-05-29 | Peugeot Citroen Automobiles Sa | DEVICE FOR DIAGNOSING THE HEALTH STATUS OF ELECTRIC ENERGY STORAGE MEANS COUPLED TO AN ELECTRIC POWER PRODUCER, AND ASSOCIATED CONTROL DEVICE |
| EP4092805A4 (en) * | 2020-01-17 | 2024-04-10 | Hioki E.E. Corporation | Device, measurement device, method, and measurement method |
| CN112018848A (en) * | 2020-08-27 | 2020-12-01 | Oppo广东移动通信有限公司 | Charging control method and device, terminal and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2448277C (en) | 2011-02-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20220524 |
|
| MKEX | Expiry |
Effective date: 20220524 |