EP1856786A2 - Batterie et procede pour faire fonctionner une batterie - Google Patents

Batterie et procede pour faire fonctionner une batterie

Info

Publication number
EP1856786A2
EP1856786A2 EP06723287A EP06723287A EP1856786A2 EP 1856786 A2 EP1856786 A2 EP 1856786A2 EP 06723287 A EP06723287 A EP 06723287A EP 06723287 A EP06723287 A EP 06723287A EP 1856786 A2 EP1856786 A2 EP 1856786A2
Authority
EP
European Patent Office
Prior art keywords
accumulator
voltage
output
lithium
charging
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.)
Withdrawn
Application number
EP06723287A
Other languages
German (de)
English (en)
Inventor
Axel Muntermann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1856786A2 publication Critical patent/EP1856786A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply

Definitions

  • the invention relates to accumulators with at least one chargeable electrochemical cell, in particular accumulators with high discharge current for use in medical devices such as defibrillators, and a method for charging and discharging of accumulators.
  • Batteries or accumulator cells are often used to power mobile electrical appliances.
  • Typical accumulator types are lead acid accumulators, which are used, for example, in car batteries, or alkaline accumulators, which include, among others, nickel cadmium (NiCd) and nickel metal hydride (NiMH) accumulators.
  • NiCd cells which include the so-called memory effect, self-discharge of the cells, low volume capacity, as well as the use of toxic
  • Components are owned by the more advanced NiMH cells only partially avoided. In particular, memory effect and self-discharge also occur in NiMH cells.
  • lithium ion (Li-ion) accumulators have significantly better properties. This accumulator type has no memory effect and minimal self-discharge. In addition, lithium-ion cells have a significantly higher specificity and therefore have a significantly lower weight.
  • the differential cell voltage of NiCd or NiMH cells presents another problem in switching to Li Ion accumulators.
  • the problem is that the voltage supplied by an accumulator is in principle defined by the number of cells connected in series and therefore only one Many times the cell voltage of the cells used can be and therefore usually does not match the voltage of the Li-ion battery with the voltage of the battery to be replaced. This is particularly problematic if in the device a power supply is integrated to charge the battery or existing chargers should continue to be used.
  • the invention is therefore based on the object to show a way how accumulators can be provided and used with better properties, especially in mobile electrical devices.
  • Another object of the invention is to provide a way to use accumulators in devices, which for the
  • Advantageous embodiments and further developments are described in the respective subclaims.
  • accumulator is understood in the following to mean an electrochemical energy store, which has a or more chargeable electrochemical cells.
  • a plurality of cells may be connected in parallel and / or in series within the accumulator, adapted to the values of the accumulator voltage and of the discharge current required for the respective intended use.
  • the accumulator comprises at least one chargeable electrochemical cell, an electrical connection at the output of the accumulator for supplying and / or dissipating electrical energy, a housing surrounding the at least one chargeable electrochemical cell, and a control circuit for controlling the charging process of the accumulator and / or the provision of the accumulator voltage at the output of the accumulator.
  • the control circuit is preferably disposed within the housing of the accumulator.
  • the accumulator is designed for operation, in which at least temporarily at the output of the accumulator an external voltage, for example from a power supply, is applied, which below the
  • control circuit is advantageously designed to monitor whether the external voltage is present, and depending on this, the charging process of the accumulator and / or the
  • the temporarily applied to the output of the accumulator external voltage is provided in particular by a temporarily connected to an electrical supply network power supply, which is integrated, for example, in the supplied from the accumulator electrical device.
  • the invention allows through the integrated control circuit, the use of a lithium-ion battery with a higher battery voltage in a manner that ensures the charging function without changes in To make the device itself.
  • control circuit advantageously comprises a corresponding controllable switch, by means of which the accumulator voltage can be switched to the output or separated from it.
  • control circuit further advantageously comprises a controllable charging circuit, which preferably has a
  • Voltage converter comprises, converts the external voltage in a higher, suitable for charging the battery voltage.
  • rechargeable battery voltage refers to the voltage which is supplied by the at least one electrochemical cell of the rechargeable battery and can be selectively applied to the output of the rechargeable battery by means of the controllable switch.
  • the control circuit For monitoring the voltage applied to the output of the accumulator, the control circuit preferably has at least one comparator, which is designed to compare the voltage present at the output of the accumulator with a reference voltage.
  • the first comparator responds when the monitored voltage is below a reference voltage and the second comparator when the monitored voltage is above a reference voltage. Since the charging process of the accumulator and / or the provision of the accumulator voltage at the output of the accumulator is controlled by the control circuit in dependence on whether the external voltage is present, the at least one comparator is preferably designed to control the controllable switch and / or the controllable charging circuit ,
  • control circuit is advantageously designed to set the accumulator voltage at the output of the accumulator when detecting a voltage applied to the output of the accumulator voltage below a reference voltage and to interrupt the charging of the accumulator by the charging circuit. Accordingly, the
  • Control circuit advantageously designed to separate the accumulator voltage from the output of the accumulator when detecting a voltage applied to the output of the accumulator above the reference voltage and to perform the charging of the accumulator by means of the charging circuit.
  • control circuit comprises at least one timer, which is connected between the at least one comparator and the controllable switch and / or the controllable charging circuit and is adapted to delay the control signal of the comparator by a predetermined delay time.
  • control signal of the comparator is delayed by a corresponding timer by a predetermined delay time, which serves to disconnect the accumulator voltage from the output of the accumulator and in particular controls the provided for this purpose controllable switch.
  • a predetermined delay time which serves to disconnect the accumulator voltage from the output of the accumulator and in particular controls the provided for this purpose controllable switch.
  • the charging of the battery or the activation of the charging circuit is preferably delayed by a second predetermined delay time by a second timer, wherein this delay time is preferably set so that the charging process is not started before detecting an external voltage applied to the output. Whether an external voltage is applied to the output is recognized by the fact that the detection of a voltage applied to the output of the accumulator voltage below the reference voltage is omitted when the battery voltage is disconnected from the output of the accumulator.
  • control circuit advantageously comprises an energy store for storing electrical energy, which is designed in particular as a capacitor.
  • the invention generally allows in a particularly advantageous manner, the operation of a battery in an electrical device which is at least temporarily connected to a power supply, wherein in the connected state, the power supply serves both to operate the electrical device and to charge the battery, however, the electrical device for charging the accumulator only provides a voltage which is at least below the maximum charging voltage of the accumulator. This application occurs especially when a new battery type higher voltage is to be used in an existing electrical device.
  • the accumulator according to the invention advantageously comprises at least two cells connected in series and / or at least two cells connected in parallel.
  • any other number in series and / or parallel connected accumulator cells is within the scope of the invention.
  • An inventive method for operating an accumulator with a switchable at the output of the accumulator accumulator voltage and an at least temporarily applied to the output of the accumulator external voltage, which is below the accumulator voltage at fully charged accumulator comprises the
  • the temporarily applied to the output of the battery external voltage is provided for example by a temporarily connected to an electrical power supply power supply.
  • the monitoring of the voltage applied to the output of the accumulator advantageously comprises the comparison with a predetermined reference voltage.
  • the method provides that the battery voltage is applied to the output of the battery and the charging of the battery is interrupted when the monitored voltage below a predetermined
  • Reference value falls. This is typically the case when the external voltage is disconnected from the output of the accumulator.
  • the accumulator voltage at cyclic intervals separated from the output of the accumulator.
  • the charging of the accumulator is preferably carried out only when the monitored voltage over a predetermined period of time is above a predetermined reference value or an applied external voltage has been detected. Accordingly, the predetermined voltage reference value is preferably below the voltage value of the external voltage.
  • the method advantageously provides that the charging of the accumulator by the voltage applied to the output of the accumulator external voltage comprises the conversion of a voltage. Furthermore, the method preferably provides for storing electrical energy, which is provided in particular by the accumulator, in an energy store, in particular a capacitor.
  • the method provides in a further embodiment that is automatically switched from the at least first accumulator to the at least second accumulator.
  • the inventor has further surprisingly found that accumulators based on certain lithium-ion cells can be operated without the protection circuit otherwise required for lithium-ion cells.
  • an accumulator which at least one
  • Lithium ion cell an electrical connection for the supply and / or discharge of electrical energy, a housing surrounding the at least one lithium-ion cell, and a communication interface for the communication between the accumulator and a to be supplied
  • the communication interface is adapted to the properties of the lithium-ion cell and the lithium-ion cell is adapted to be operated without protection circuit.
  • the invention thus provides a lithium ion cell based battery which can be operated without a protection circuit protecting the cells from overcharging, overdischarging, and short circuiting.
  • the communication interface may be preferred, for example be adapted to support the Smart Battery System (SBS), wherein the exchanged with the electrical equipment to be supplied protocol data on the properties of the lithium ion cells used, which can be operated without protection circuit adapted.
  • SBS Smart Battery System
  • At least one electrode of the lithium ion cell comprises manganese.
  • the positive electrode of the lithium-ion cell has a nickel / manganese mixture. The use of these materials significantly improves cell performance in terms of overcharging, overdischarging and short circuiting.
  • the lithium-ion cell is advantageously designed as a lithium-polymer cell.
  • Polymer-based accumulator cells for example with a solid or gelatinous polymer electrolyte layer, allow the production of thin foil batteries and thus a favorable shape design for installation in portable devices.
  • the lithium-ion cell has a maximum
  • an accumulator according to the invention advantageously comprises at least two series-connected and / or at least two lithium ion cells connected in parallel.
  • the at least one meets
  • Lithium ion cell meets the safety standard according to UL 1642.
  • a protection circuit integrated in the accumulator is not required.
  • the at least one lithium-ion cell is preferably for discharging in one
  • the lithium-ion cell is advantageous for charging in an operating temperature range of at least 10 ° to 40 ° C, in particular 5 ° to 45 ° C, in particular 0 ° to 50 0 C, suitable.
  • the lithium-ion cell preferably has a vibration resistance according to EN 1789.
  • the lithium-ion cell has an initial capacity of preferably at least 1400 mAh, in particular at least 1600 mAh, in particular at least 1800 mAh, in particular at least 2000 mAh, in order to ensure a sufficient operating time of the accumulator.
  • the lithium-ion cell preferably attains a high percentage of its initial capacity over a large number of charging and discharging cycles to ensure a long life of the battery.
  • the lithium-ion cell advantageously has a capacity of at least 60%, in particular 70%, in particular 80%, of the initial capacity after approximately 500 charge cycles with an average discharge current of 1.5 A and a discharge to a storage voltage of approximately 3V.
  • the lithium-ion cell advantageously has a capacity of at least 40%, in particular 50%, in particular 60%, of the initial capacity after approximately 500 charging cycles with an average discharge current of 4.5 A and a discharge to a battery voltage of approximately 3V.
  • the lithium-ion cell has a maximum discharge current of at least 10 A, in particular 30 A, in particular 50 A, on.
  • the invention provides an accumulator arrangement, which comprises at least a first and a second accumulator as described above, as well as a connection for the supply and / or discharge of electrical energy, and an electronic assembly, which is designed for unloading the accumulator arrangement to discharge the second accumulator only when the first accumulator is completely discharged.
  • an electronic assembly which is designed for unloading the accumulator arrangement to discharge the second accumulator only when the first accumulator is completely discharged.
  • An accumulator according to the invention can be used particularly advantageously in electrical appliances which require a high discharge current and high availability.
  • the invention therefore further comprises a medical device, in particular with a device for monitoring the
  • An inventive medical device advantageously comprises an integrated power supply which can be connected to an electrical supply network.
  • the accumulator according to the invention may already comprise at least one power supply.
  • the power supply is preferably integrated or arranged in or on the housing of the accumulator.
  • the invention provides a charger which is designed to charge an accumulator described above.
  • the above-described lithium ion cell based battery and the corresponding accumulator arrangement have a number of advantageous properties over conventional accumulators. These include an increased mechanical stability, a usability in a wider temperature range, an increased
  • an inventive accumulator and / or accumulator arrangement is particularly advantageous for use in a medical device, which in particular comprises a device for monitoring cardiac functions and / or a defibrillator.
  • a medical device which in particular comprises a device for monitoring cardiac functions and / or a defibrillator.
  • an accumulator according to the invention for example in a defibrillator / monitor system of Type LifePak 12 from Medtronic, the operating time of currently about 2.5 h when using a NiCd accumulator to about 5.5 h using a 3s3p accumulator according to the invention (3s3p: three lithium ion cells serially and three connected in parallel) and about 11 h be increased when using an accumulator arrangement with two batteries.
  • the medical device comprises means for determining the accumulator voltage and / or means for automatically switching from the at least first accumulator to the at least second accumulator.
  • the first accumulator for general operation of the medical device and the second is used as a spare or Notakkumulator.
  • the Notakkumulator is only used when the first accumulator for the operation of the medical device is not sufficient
  • the invention automatically switches over to the second accumulator.
  • a user of the medical device need not first check the state of the first accumulator or even make a manual change or a manual switching to the second accumulator.
  • the means for automatically switching from the at least first accumulator to the at least second accumulator may also already be included in the accumulator arrangement according to the invention.
  • the accumulator arrangement, the medical device and / or the charger preferably a signal color or a color that is clearly perceptible to the human eye is applied to the above-mentioned devices.
  • the applied color may be a luminous color which comprises corresponding phosphors as constituents.
  • the devices mentioned in the preceding paragraph can have at least one light source, for example an LED.
  • the light source can in this case continuously emit light or, in order to increase the signal effect, emit the light in the form of short, preferably periodic, light pulses or flashing.
  • said devices may comprise at least one sound source.
  • the sound source can continuously emit sound, in particular at least one sound, or, in order to increase the signal effect, emit the sound in the form of short, preferably periodic, sound pulses.
  • said sound source further comprises means for detecting an acoustic signal, preferably a tone sequence. The sound source starts transmitting only after detecting this acoustic Signal, which is transmitted for example by a user of the medical device.
  • the light source and / or the sound source has or have, in particular, at least one own accumulator for the supply, which, for example, can also be charged via the charging process according to the invention.
  • a medical device according to the invention can be advantageously used, for example, in public facilities, in off-shore facilities, in sports facilities, in railway stations or on airfields.
  • the larger temperature range comes into play, in which a medical device can be operated with a rechargeable battery according to the invention.
  • a rechargeable battery according to the invention Due to the long shelf life of a rechargeable battery according to the invention also the use in defibrillator and / or monitor devices is advantageous, which are installed for emergencies, for example, in sports facilities or train stations and are conventionally equipped with disposable batteries, for example dry batteries.
  • Fig. L a schematically a control circuit for controlling the loading and unloading of an inventive
  • Fig. L.b schematically a control circuit for controlling the
  • FIG. 1 c shows an extended embodiment of the control circuit from FIG. 1 b
  • FIG. 2 shows a schematic functional diagram of the control circuit shown in FIG. 1 a
  • FIG. 3 shows a schematic representation of a first embodiment of a rechargeable battery according to the invention
  • FIG. 4 shows a schematic representation of a second one
  • Embodiment of an accumulator according to the invention which for interconnecting a plurality
  • Fig. 6 is a schematic representation of a third embodiment of an inventive
  • FIG. 7 schematically shows a diagram of the charging characteristic of a lithium ion cell which is preferably used in a rechargeable battery according to the invention
  • FIG. 8 schematically shows a diagram of the discharge capacity as a function of the discharge current of a lithium ion cell preferably used in a rechargeable battery according to the invention
  • FIG. 9 shows schematically a diagram of the discharge capacity as a function of the temperature of a lithium ion cell which is preferably used in an inventive rechargeable battery;
  • FIG. 10 schematically shows a diagram with discharge curves at different discharge currents of a lithium ion cell preferably used in a rechargeable battery according to the invention
  • FIG. 11 shows schematically a diagram with discharge curves at different temperatures of a rechargeable battery preferably used in an inventive rechargeable battery
  • FIG. 12 schematically shows a diagram of the capacitance of a lithium ion cell preferably used in a rechargeable battery according to the invention as a function of the charging cycles at a discharge current of 1.5 A,
  • FIG. 13 schematically shows a diagram of the capacitance of a lithium ion cell preferably used in an accumulator according to the invention as a function of the charging cycles with a discharge current of 4.5 A.
  • FIG. 1 a shows a schematic block diagram of a control circuit for regulating the charging and discharging of a rechargeable battery according to the invention during operation with an external voltage 20 applied at least partially to the output 30 of the rechargeable battery, which is lower than the rechargeable battery voltage 10 at least when the rechargeable battery is fully charged.
  • control circuit shown in Fig. La in conjunction with the associated, in Fig. 2 described functional diagram described.
  • the external voltage 220, the voltage 210 present at the output of the accumulator, as well as the respective switching states 230 and 240 of the discharge switch 70 and the charging circuit 80 are shown as a function of time.
  • the discharge switch has the switching state ON, i. the accumulator voltage 10 is applied to the output 30 and therefore corresponds to the output voltage 210.
  • the charging circuit at this time has the switching state OFF, i. the accumulator will not charge.
  • the external voltage 20 is applied to the output 30, represented in FIG. 2 by the voltage curve 220 of the external voltage. For the external voltage, a desired range is shown in FIG.
  • the reference voltage 40 which is below the external voltage 20, is also shown in Fig. 2 by a corresponding line. At the start time, the voltage applied to the output is above the reference voltage.
  • the comparator 54 has already responded to this state at a time before the start time and generated a control signal. This
  • Control signal was delayed by the delay element 62 by the time Tl and forwarded in this example at time tl.
  • the control signal of the discharge switch 70 is switched to the switching state OFF and the output 30 is thus at the external voltage 20 at.
  • the control signal comparator 54 is delayed by a further delay time T2 and passed to the charging circuit 80 at time t2 and this switched to the switching state ON to to charge the accumulator by means of the applied external voltage 20.
  • the external voltage 20 is turned off and this falls to zero, a drop in the voltage applied to the output is buffered by an example designed as a capacitor energy storage 90. Nevertheless, the voltage 210 present at the output 30 drops below the reference voltage 40 at the time t4. As a result, the comparator 52 responds and instantaneously switches the discharge switch 70 to the switching state ON and the charging circuit to the switching state OFF. At time t5, therefore, the accumulator voltage 10 is again present at the output 30.
  • the comparator 54 is responsive and switches the discharge switch 70 after the delay time Tl in the switching state OFF, whereby the voltage at the output 30 falls again.
  • the comparator 54 switches the discharge switch 70 after the delay time Tl in the switching state OFF, whereby the voltage at the output 30 falls again.
  • the external voltage 220 is at zero or below the reference voltage 40
  • the output voltage again falls below the reference voltage 40 and again the comparator 52 switches, before the expiration of the delay time T2
  • the charging process of the accumulator is therefore not started.
  • 1 b schematically shows a further control circuit, in particular for charging a rechargeable battery according to the invention.
  • the control circuit comprises an integrated circuit 925 for monitoring the voltage during the charging process.
  • the circuit 925 shown has two channels by way of example, of which only one channel, the upper channel in the figure, is used.
  • the accumulator 102 or at least one cell of the accumulator 102 is connected to a power supply unit 980.
  • Voltage 20 is reduced via the acting as a voltage divider resistors 901, 902 and 903 or Rl, R2 and R3 to an adapted for a comparator 910 order of magnitude.
  • the comparator 910 compares the reduced voltage with a reference or comparison voltage 920, which, for example, has a value of about 1.3 V, as hereinbefore. As long as the reduced voltage is smaller than the comparison voltage 920, the output of the inverter is connected through a boosting inverter 930 and a MOS-FET 941
  • a transistor 950 is switched on or off via the base resistor or resistor 904 or R4, thus switching a relay 960.
  • the transistor 950 addresses the coil 960 belonging to the relay 960 and the transistor 950 Line 915 between power supply 980 and the cells of accumulator 102 is closed by relay 960.
  • the operating voltage is now also applied via relay contact 960 to the cells of accumulator 102 to be charged.
  • the operating voltage is preferably approximately 12.25 V. If the voltage rises to a value greater than 12.25 V, this is detected via the resistors R 1, R 2 and R 3 acting as voltage dividers and the output of the circuit 928 is set to "Low". so that the relay 960 switches and the line 915 and thus the loading is interrupted. As a result, damage to the cells of the accumulator 102 is avoided by an excessive operating voltage.
  • the diode 970 is formed as a reverse-biased Zener diode or Zener diode.
  • the diode 970 is selected such that its Z voltage matches the system or circuit 925 critical voltage. As soon as the operating voltage exceeds a voltage level detrimental to the circuit 925 or the system, the diode 970 exhibits a greatly reduced resistance, the operating voltage of the power supply 980 through resistor R5 to ground, thus protecting the circuit from potential damage.
  • the Zener diode has a Z voltage of about 15V.
  • Fig. Lc shows a further embodiment of the control circuit according to the invention.
  • the circuit corresponds to the circuit shown in Figure lb and is extended with the resistor 906 or R ⁇ and a diode 971, which are seconded parallel to the relay 960. Via the diode 971, the power supply 980 or a connected defibrillator, even with the switch open, here with the relay 960 open, determine whether the accumulator 102 is connected.
  • the relay 960 shown in FIGS. 1b and 1c another component with a suitable function for establishing the connection between the power supply unit 980 and the accumulator 102, such as, for example, a MOS-FET, may also be used.
  • 3 shows a schematic representation of a first embodiment of a rechargeable battery 102 according to the invention, which has three manganese-based lithium ion cells 110 connected in series. Are also advantageous to
  • the accumulator has in this embodiment, an electronic module 120, which is used for communication with the electrical device to be supplied.
  • the electronic assembly 120 may further include a control circuit as described above.
  • the connection plug 130 of the accumulator 102 comprises connection contacts 132 and 134 for supplying or discharging electrical energy, as well as a communication interface 136 for the unidirectional or bidirectional exchange of protocol data. As a result, individual information associated with the accumulator 102 can be retrieved and / or stored in a memory of the electronic module 120.
  • Communication interface or the exchanged protocol data are adapted to the properties of the lithium ion cells used, which can be operated without protection circuit.
  • 4 shows a schematic illustration of a second embodiment of an accumulator 104 according to the invention, which is designed to interconnect a plurality of accumulators.
  • the accumulator 104 additionally has a connection socket 140, comprising connection contacts 142 and 144 for supplying or removing electrical energy, as well as a communication interface 146 for the uni- or bidirectional exchange of data.
  • the terminal socket 140 is further configured to receive a terminal plug 130. In this way, at least two similar Accumulators 104 are connected to one another.
  • the accumulator 104 additionally has a further electronic module 150.
  • the assemblies 120 and 150 are designed to cascade the accumulators to be discharged and / or charged.
  • the assemblies 120 and 150 are each designed to discharge the accumulator 104' when discharging via the terminal of the accumulator 104 only when the accumulator 104 is already completely discharged is.
  • FIG. 6 shows a further advantageous embodiment of an accumulator according to the invention, which comprises a state of charge indicator 300 which is in this
  • Embodiment displays the current state of charge of the battery by means of LEDs 310.
  • the display may be activated via a pressure switch 320 as needed.
  • a further light-emitting diode 330 is provided as a wear indicator in this embodiment, which indicates, for example, the achievement of a predetermined number of charging cycles of the accumulator.
  • the wear indicator also several LEDs can be provided, which are activated depending on the completed charging cycles.
  • any other suitable type of optical or non-optical indication of the state of charge and / or the charging cycles of the accumulator is within the scope of the invention.
  • FIGS. 7 to 13 Various properties of manganese-based lithium-ion cells are shown in FIGS. 7 to 13, which are preferably used in an accumulator according to the invention.
  • Fig. 7 schematically shows a diagram of the charging characteristic of the lithium-ion cell. Depicted are charging voltage 410, charging capacity 420 and charging current 430.
  • FIG. 8 schematically shows a diagram of the discharge capacity 510 as a function of the discharge current of the lithium-ion cell at a temperature of 23 ° C., the cell being charged at a voltage of 4.2 V and a charging current of IA over 3 h and the discharging process at 3 , 0 V is canceled.
  • FIG. 9 shows schematically a diagram of the discharge capacity 520 as a function of the temperature of the lithium-ion cell, wherein the cell was charged at a voltage of 4.2 V and a charging current of IA over 3 h, and FIG
  • FIG. 10 schematically shows a diagram with discharge curves 610, 620 630, 640 and 650 of the lithium-ion cell at different discharge currents.
  • FIG. 11 schematically shows a diagram with discharge curves 710, 720, 730, 740 and 750 of the lithium-ion cell at different temperatures.
  • Fig. 12 shows schematically a diagram of the capacity 810 of the lithium-ion cell as a function of the number of charging cycles at a discharge current of 1.5 A.
  • FIG. 13 shows accordingly a schematic diagram of the capacity 820 of the lithium-ion cell as a function of the number of charge cycles at a discharge current of 4.5 A.
  • connection contacts for supplying or removing electrical energy

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Electrotherapy Devices (AREA)

Abstract

L'objectif de cette invention est de concevoir des batteries présentant de meilleures propriétés, notamment pour des appareils électriques mobiles, et d'utiliser des batteries dans des appareils configurés pour fonctionner au moyen de batteries d'un autre type, notamment à l'aide de cellules présentant une tension de cellule différente. A cet effet, la batterie selon l'invention est conçue pour fonctionner à l'aide d'une tension externe qui se trouve au moins temporairement à la sortie de la batterie, et qui est inférieure à la tension de sortie de la batterie lorsque celle-ci est entièrement chargée. La batterie selon l'invention comprend au moins une cellule électrochimique chargeable, un raccord électrique qui se trouve à la sortie de la batterie et qui sert à fournir et/ou évacuer de l'énergie électrique, un boîtier qui entoure la/les cellule(s) électrochimique(s) chargeable(s), et un circuit de réglage qui sert à régler le processus de charge de la batterie et/ou la mise à disposition de la tension de la batterie à la sortie de la batterie. Cette invention se rapporte également à un procédé pour faire fonctionner ladite batterie. La présente invention concerne en outre une batterie comportant au moins une cellule au ion-lithium, et une interface de communication qui sert à assurer une communication entre la batterie et un récepteur à alimenter, et qui est adaptée aux propriétés de la cellule au ion-lithium, cette cellule au ion-lithium étant conçue pour fonctionner sans circuit protecteur. L'invention concerne par ailleurs un ensemble batterie, un appareil médical, un chargeur, ainsi que l'utilisation d'un accumulateur ou d'un appareil médical.
EP06723287A 2005-03-08 2006-03-08 Batterie et procede pour faire fonctionner une batterie Withdrawn EP1856786A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005011081A DE102005011081A1 (de) 2005-03-08 2005-03-08 Akkumulator und Verfahren zu dessen Betrieb
PCT/EP2006/002130 WO2006094785A2 (fr) 2005-03-08 2006-03-08 Batterie et procede pour faire fonctionner une batterie

Publications (1)

Publication Number Publication Date
EP1856786A2 true EP1856786A2 (fr) 2007-11-21

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EP06723287A Withdrawn EP1856786A2 (fr) 2005-03-08 2006-03-08 Batterie et procede pour faire fonctionner une batterie

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US (1) US8049464B2 (fr)
EP (1) EP1856786A2 (fr)
AU (1) AU2006222162B2 (fr)
CA (1) CA2599804A1 (fr)
DE (1) DE102005011081A1 (fr)
IL (1) IL185783A0 (fr)
NO (1) NO20075045L (fr)
NZ (1) NZ561062A (fr)
WO (1) WO2006094785A2 (fr)

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US20090051320A1 (en) 2009-02-26
DE102005011081A1 (de) 2006-09-14
US8049464B2 (en) 2011-11-01
AU2006222162A1 (en) 2006-09-14
WO2006094785A3 (fr) 2006-11-16
NZ561062A (en) 2011-02-25
CA2599804A1 (fr) 2006-09-14

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