DE102007036165A1 - Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery - Google Patents

Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery

Info

Publication number
DE102007036165A1
DE102007036165A1 DE102007036165A DE102007036165A DE102007036165A1 DE 102007036165 A1 DE102007036165 A1 DE 102007036165A1 DE 102007036165 A DE102007036165 A DE 102007036165A DE 102007036165 A DE102007036165 A DE 102007036165A DE 102007036165 A1 DE102007036165 A1 DE 102007036165A1
Authority
DE
Germany
Prior art keywords
accumulator
voltage
battery
device
ak
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.)
Ceased
Application number
DE102007036165A
Other languages
German (de)
Inventor
Maik Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Bosch und Siemens Hausgaraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgaraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgaraete GmbH filed Critical BSH Bosch und Siemens Hausgaraete GmbH
Priority to DE102007036165A priority Critical patent/DE102007036165A1/en
Publication of DE102007036165A1 publication Critical patent/DE102007036165A1/en
Application status is Ceased legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety devices
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2805Parameters or conditions being sensed
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2857User input or output elements for control, e.g. buttons, switches or displays
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2868Arrangements for power supply of vacuum cleaners or the accessories thereof
    • A47L9/2873Docking units or charging stations
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2868Arrangements for power supply of vacuum cleaners or the accessories thereof
    • A47L9/2884Details of arrangements of batteries or their installation
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2894Details related to signal transmission in suction cleaners
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/3644Constructional arrangements
    • G01R31/3648Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47LDOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2201/00Robotic cleaning machines, i.e. with automatic control of the travelling movement or the cleaning operation
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements

Abstract

The method involves adding auxiliary voltage to a terminal voltage of a battery (AK) during operation of a battery-operated device by an adding device (ADD). The auxiliary voltage is obtained by multiplying flowing battery current with a battery-dependent resistance factor by a multiplication device (MUL). A level of total voltage obtained from the terminal voltage and the auxiliary voltage is activated as a mail for actually available charging condition of the battery based on a reference voltage assigned to the determined charging condition of the battery. An independent claim is also included for a circuit arrangement for executing the method for determining a charging condition of a battery.

Description

  • The The present invention relates to a method and a circuit arrangement for determining the state of charge of a different current load exposed accumulator of a Akkumulatorbetriebenen device, in particular an accumulator-powered self-propelled dust collection robot, and optionally determining the time of a required Charging the relevant accumulator. For the relevant dust collection robot it is such a device, which of to be cleaned floor surfaces Allowed to pick up dirt and dust particles.
  • Around the state of charge of a different current loads exposed Accurately determining accumulators, it is necessary, not only that detect respective terminal voltage, but also on the accumulator internal resistance respectively to consider decreasing voltage. The accumulator internal resistance is namely of the respective state of charge of the accumulator and moreover depends on the temperature and the age of the accumulator. Around to make such a state of charge determination, so would have to the operation of the device, which receives energy from the accumulator, shut down and corresponding Measurements performed become. This is not practical in most cases. in the Case of an accumulator-powered self-propelled dust collection robot should this one for the implementation each of the respective measurements are turned off, which meanwhile as undesirable is to be considered.
  • Of the Invention is therefore based on the object to show a way as the state of charge of a different current loads exposed Accumulator of an accumulator-operated device, in particular an accumulator-operated device self-propelled dust collection robot in a simpler way, ie without the aforementioned Shutdowns of the device in question with sufficient in practice Accuracy can be determined.
  • Is solved the above-indicated object firstly in a method of the aforementioned type according to the invention in that the terminal voltage of the accumulator during the working of the operated by this device adds an additional voltage is by multiplying the respective flowing Akkumulatorstro mes with an accumulator-dependent Resistance factor is obtained, and that the height of the respective terminal voltage and the said additional voltage obtained sum voltage with respect attributable to a certain state of charge of the accumulator Reference voltage as a measure of the actual state of charge of the accumulator is used.
  • The Invention brings with it the advantage that by the consideration only an accumulator-dependent Resistance factor and the respectively determined current, the Battery is removed, its state of charge in a simpler manner as stated above, that is without the shutdowns of the accumulator-powered device with can be determined in practice of sufficient accuracy.
  • Preferably becomes the accumulator-dependent Resistance factor by an average of the DC internal resistance of the accumulator formed at its different states of charge. hereby will provide an optimum of accuracy in determining the accumulator state of charge reached.
  • Conveniently, the said sum voltage is compared with the reference voltage, and falls below the reference voltage by the relevant Total voltage becomes a recharging of the rechargeable battery Message signal issued. In this way, a necessary reloading of the accumulator in each case in time. This is special in an accumulator-powered self-propelled dust collection robot of great Use; by delivery of the mentioned Notification signal can namely the relevant dust collection robot still safely moved to an accumulator charging station to charge his accumulator there.
  • On the other hand, the object underlying the invention is solved by a circuit arrangement serving to carry out the method according to the invention, which is characterized in that, in addition to a voltage measuring device for measuring the terminal voltage of the accumulator, a current measuring device for measuring the accumulator each taken stream is provided that with a height of the respective measured current output of the respective current measuring device is a multiplier connected to an input side, that is connected to another input side of the multiplier an accumulator-dependent resistance factor emitting resistance factor output device that on a the respective terminal voltage of the accumulator supplying output of the voltage measuring device and at one by multiplying the respectively flowing accumulator current with the accumulator dependent n resistance factor received additional voltage output of the multiplier an input device is connected on the input side, through which the respective terminal voltage and the Additional voltage can be added to a sum voltage that is connected to a said output voltage of the summing voltage output a comparator having an input, that the comparator is connected to a further input at the output of a reference voltage source, which allows to give a certain state of charge of the accumulator to be assigned reference voltage , and in that the comparator is followed by an evaluation device (control device ST) which processes the respective comparator output signal, by means of which the state of charge of the accumulator can be determined as a function of the respective comparator output signal. This results in the advantage that overall can be done with a relatively low circuit complexity to the state of charge of said accumulator can be determined in practice with sufficient accuracy.
  • Conveniently, is from the evaluation device (this is a control device) when one falls below the reference voltage by the relevant sum voltage indicating comparator output signal a recharging of the accumulator of the accumulator operated device indicating Message signal can be issued. Through this relatively simple circuit measure results the advantage that a necessary recharging the accumulator can be done on time. This is, as already mentioned, in particular in an accumulator-powered self-propelled dust collection robot of great Use; by using the relevant message signal for such Control the dust collection robot that this to a battery charging station can go thus the timely recharging of the accumulator done.
  • At Hand of a drawing will be below an embodiment of the after Method according to the invention operated circuit arrangement explained in more detail.
  • In The drawing is a possible diagram in a schematic diagram Structure of a circuit shown, with the help of the state of charge of an accumulator of an accumulator-operated device and, if applicable, the time of a required charge of the relevant accumulator.
  • The in the drawing shown circuitry shows an accumulator AK, which can consist of a plurality of cells and in which either a lead-acid battery, a NiCd battery, can be a NiMH accumulator or other accumulator. The accumulator AK supplies among other things the drive energy for drive motors AM1 and AM2, through the drive wheels RA1 or RA2 of a mobile device be driven, for example, it is an accumulator-powered Dust collecting robot can act. The relevant energy supply of the accumulator AK to the drive motors AM1 and AM2 via switches SW1 and SW2, which are controlled by a controller ST forth. This will be further discussed below To be received.
  • the Accumulator AK is a voltage measuring device UM connected in parallel, with the terminal voltage of the accumulator AK during the Working of operated by this accumulator AK device measured becomes. In the supply circuit of the device in question is in series with the accumulator AK arranged a current measuring device IM, with which the accumulator AK each removed current is measured. The of the current measuring device Each measured current becomes an input of a multiplier MUL fed, the at a further input a so-called accumulator-dependent resistance factor is supplied from a resistance factor output device FAK. This accumulator-dependent Resistance factor corresponds approximately to the mean internal resistance the accumulator AK between its discharge state and the fully charged state, and more specifically at a predetermined temperature of, for example + 18 ° C and an average operating time of approx. 2 years. This accumulator-dependent resistance factor is in the multiplier MUL with that of the current measuring device In each measured and delivered current value multiplied and an input of an adder ADD supplied at another Input the terminal voltage measured by the voltage measuring device UM supplied to the accumulator AK becomes. The adder ADD adds the two voltage values to a sum voltage corresponding to an input of a comparator KO supplied is at a further input from a reference voltage source REF supplied a reference voltage is assigned to a certain state of charge of the accumulator is.
  • If the value of the reference voltage delivered by the reference voltage source REF is undershot by the aforementioned sum voltage, this is evaluated by the control device ST downstream of the comparator KO as a requirement for reloading of the accumulator AK, whereupon the control device ST stores the mobile device in which the circuit arrangement shown in the drawing, causes to drive to a charging station in which the accumulator AK can be recharged. For this purpose, the driving wheels AM1 and AM2 driving the drive wheels RA1, RA2 can be controlled via the control devices ST respectively Switch SW1 or SW2 are controlled in accordance with control signals, which are determined due to detection of the relevant charging station by the mobile device. For this purpose, the control device ST can cause a transmission device SE to emit transmission signals, for example ultrasound signals, and an associated reception device RE can receive reflected signals received on the transmission signals and emit the control device ST for evaluation and derived therefrom to control the drive motors AM1, AM2, so that the mobile device is finally driven to the charging station. In this context, it should be noted that the transmitting device SE can consist of a plurality of transmitting modules, and that the receiving device RE can consist of a plurality of receiving sensors.
  • in the With regard to the circuit arrangement shown in the drawing It should be noted that these with respect to the resistance factor delivery device FAK, the multiplier MUL, the adder ADD, the reference voltage source REF, the comparator KO and the control device ST not by individual circuitry, as shown, needs to be realized, but by a microcontroller be formed with a software or by a microprocessor system which is a central processing unit or CPU, a ROM program memory, a RAM memory and interface circuits, such as UART or Contains USART circuits, which as interface circuits between the measuring devices UM, IM, the switches and the transmitting device SE and the receiving device RE act.
  • In conclusion, be It should be noted that the present invention is for determining the state of charge of an accumulator of an accumulator-operated equipment not on an accumulator-powered self-propelled device, such as limited to a dust collection robot but that the present invention is also used in stationary devices which are accumulator-operated and in which the state of charge of the respective accumulator is to be determined.
  • ADD
    adder
    AK
    accumulator
    AM1, ON 2
    drive motor
    FAK
    Resistance factor dispenser
    IN THE
    Current measurement device
    KO
    comparator
    MUL
    multiplying
    RA1, RA2
    drive wheel
    RE
    receiver
    REF
    Reference voltage source
    SE
    transmitting device
    ST
    control device
    SW1, SW2
    switch
    AROUND
    Voltage measuring device

Claims (6)

  1. Method for determining the state of charge of a battery of an accumulator-operated device, in particular an accumulator-operated self-propelled dust collection robot, and, if appropriate, for determining the time of required charging of the relevant accumulator, characterized in that the terminal voltage of the accumulator (AK) during operation of the latter operated device is added to an additional voltage, which is obtained by multiplying the respective flowing accumulator current with an accumulator-dependent resistance factor (FAK), and that the height of the sum voltage obtained from the respective terminal voltage and said additional voltage with respect to a certain state of charge of the accumulator attributable reference voltage (REF) is used as a mail for the actually present state of charge of the accumulator.
  2. Method according to claim 1, characterized in that that the accumulator-dependent Resistance factor by an average of the DC internal resistance of the accumulator (AK) formed at its different states of charge becomes.
  3. Method according to claim 1 or 2, characterized that said sum voltage is connected to the reference voltage (REF) is compared and that falls below the reference voltage (REF) by the relevant sum voltage a reloading the Accumulator (AK) demanding message signal is delivered.
  4. Circuit arrangement for carrying out the method according to one of claims 1 to 3 for determining the state of charge of a different current loads exposed accumulator Akkumulatorbetriebenen a device, in particular an accumulator-powered self-propelled dust collection robot, and optionally for determining the timing of a required charging of the relevant accumulator, with a voltage measuring device for measuring the Terminal voltage of the accumulator, characterized in that in addition a current measuring device (IM) for measuring the accumulator (AK) each removed stream is provided that with a the height of each current output output of the respective current measuring device (IM) is a multiplier (MUL) connected to an input side, that is connected to another input side of the multiplier (MUL) an accumulator-dependent resistance factor emitting resistance factor output device (FAK), in that an output device of the voltage measuring device (UM) which supplies the respective terminal voltage of the accumulator (AK) and an output voltage of the multiplier device (MUL) which receives the additional voltage obtained by multiplying the respectively flowing accumulator current by the accumulator-dependent resistance factor, an input device (ADD) is connected on the input side, by means of which the relevant terminal voltage and the additional voltage can be added to form a sum voltage such that a comparator (KO) having an input is connected to an output of the adder device (ADD) which delivers said sum voltage is closed, that the comparator (KO) is connected to another input at the output of a reference voltage source (REF), which allows to be assigned to a certain state of charge of the battery reference voltage, and that the comparator (KO) processing the respective comparator output signal evaluation (Control device ST) is arranged downstream, by the state of charge of the accumulator (AK) can be determined in dependence on the respective comparator output signal.
  5. Circuit arrangement according to Claim 4, characterized that of the evaluation device (control device ST) when occurring one falls below the reference voltage by the relevant Summation voltage indicating comparator output signal a recharging indicating the accumulator (AK) of the accumulator-operated device Message signal is deliverable.
  6. Circuit arrangement according to Claim 5, characterized that at by an accumulator-powered self-propelled dust collection robot formed accumulator operated device by the signal of the Dust collecting robot is controlled so that it to a battery charging station breaks forth.
DE102007036165A 2007-08-02 2007-08-02 Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery Ceased DE102007036165A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102007036165A DE102007036165A1 (en) 2007-08-02 2007-08-02 Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007036165A DE102007036165A1 (en) 2007-08-02 2007-08-02 Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery

Publications (1)

Publication Number Publication Date
DE102007036165A1 true DE102007036165A1 (en) 2009-02-05

Family

ID=40175804

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102007036165A Ceased DE102007036165A1 (en) 2007-08-02 2007-08-02 Battery charging condition i.e. charging time, determining method for battery-operated self-propelled dust collecting robot, involves activating level of total voltage activated as mail for actually available charging condition of battery

Country Status (1)

Country Link
DE (1) DE102007036165A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081842A1 (en) * 2011-08-31 2013-02-28 BSH Bosch und Siemens Hausgeräte GmbH Device and method for displaying a residual life of a cordless vacuum cleaner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340771A1 (en) * 1993-06-08 1994-12-15 Samsung Electronics Co Ltd An automatic cleaning device
EP1351068A2 (en) * 2002-04-02 2003-10-08 The Raymond Corporation Battery state of charge indicator
DE69909472T2 (en) * 1998-05-28 2004-05-27 Toyota Jidosha K.K., Toyota An apparatus for estimating the state of charge of a battery and method for estimating the state of wear of a battery
US20050231206A1 (en) * 2004-04-16 2005-10-20 Denning Bruce S Battery gas gauge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340771A1 (en) * 1993-06-08 1994-12-15 Samsung Electronics Co Ltd An automatic cleaning device
DE69909472T2 (en) * 1998-05-28 2004-05-27 Toyota Jidosha K.K., Toyota An apparatus for estimating the state of charge of a battery and method for estimating the state of wear of a battery
EP1351068A2 (en) * 2002-04-02 2003-10-08 The Raymond Corporation Battery state of charge indicator
US20050231206A1 (en) * 2004-04-16 2005-10-20 Denning Bruce S Battery gas gauge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011081842A1 (en) * 2011-08-31 2013-02-28 BSH Bosch und Siemens Hausgeräte GmbH Device and method for displaying a residual life of a cordless vacuum cleaner

Similar Documents

Publication Publication Date Title
JP3867581B2 (en) Assembled battery system
US8022662B2 (en) Power supply for battery powered devices
US7598706B2 (en) Cell balancing battery pack and method of balancing the cells of a battery
JP4275078B2 (en) Battery current limit control method
EP2186181B1 (en) Apparatus and method for balancing of battery cell's charge capacity
US8089247B2 (en) Power autonomous portable electric tool set
US7489106B1 (en) Battery optimization system and method of use
US8493031B2 (en) Equalization device, battery system and electric vehicle including the same, equalization processing program, and equalization processing method
US20040076872A1 (en) Battery apparatus and method for monitoring battery state
EP2523248B1 (en) Battery control device and method
EP2216874A1 (en) Battery pack and balancing method of battery cells
DE60122058T2 (en) Rechargeable battery pack
EP1975636A2 (en) Fully-charged battery capacity detection method
KR100669476B1 (en) Method adjusting soc for battery and battery management system using the same
EP1058367A2 (en) Battery accumulating apparatus
JP2008104289A (en) Storage battery management device and vehicle controller equipped with it
DE10035959B4 (en) Method for discharging a plurality of rechargeable batteries and battery assembly
US20110127963A1 (en) Equalization device, equalization processing program, battery system, electric vehicle and equalization processing method
EP2075893B1 (en) Bottom based balancing in a lithium ion battery system
US20060214636A1 (en) Method and apparatus for equalizing secondary cells
KR20080105141A (en) Battery charge indication methods, battery charge monitoring devices, rechargeable batteries, and articles of manufacture
JP5086076B2 (en) Method for cell balancing for lithium battery systems
US8154299B2 (en) Deterioration determination circuit, power supply apparatus, and deterioration determination method of secondary battery
US7652449B2 (en) Battery management system and driving method thereof
JP5179047B2 (en) Storage device abnormality detection device, storage device abnormality detection method, and abnormality detection program thereof

Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection