EP4078762A1 - Alimentation en tension hybride pour un instrument de mesure - Google Patents

Alimentation en tension hybride pour un instrument de mesure

Info

Publication number
EP4078762A1
EP4078762A1 EP20820078.2A EP20820078A EP4078762A1 EP 4078762 A1 EP4078762 A1 EP 4078762A1 EP 20820078 A EP20820078 A EP 20820078A EP 4078762 A1 EP4078762 A1 EP 4078762A1
Authority
EP
European Patent Office
Prior art keywords
circuit
voltage
input
output
energy store
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.)
Pending
Application number
EP20820078.2A
Other languages
German (de)
English (en)
Inventor
Mihai Vitanescu
André Schaubhut
Frantz BINDLER
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.)
Endress and Hauser Flowtec AG
Original Assignee
Endress and Hauser Flowtec AG
Flowtec AG
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 Endress and Hauser Flowtec AG, Flowtec AG filed Critical Endress and Hauser Flowtec AG
Publication of EP4078762A1 publication Critical patent/EP4078762A1/fr
Pending 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H02J7/0049—Detection of fully charged condition
    • 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
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage

Definitions

  • the invention relates to electronics for a measuring device and a measuring device with such electronics.
  • the electronics comprise an internal supply circuit with a circuit input, with and with a circuit output and a load circuit having a microprocessor with a circuit input.
  • the circuit input of the load circuit is electrically connected to the circuit output of the supply circuit in such a way that with an output voltage applied to the circuit output of the supply circuit, a current flow from the first circuit output to the circuit input or a corresponding energy flow from the supply circuit to the load circuit is enabled.
  • the supply circuit is set up to be electrically connected with the circuit input to a circuit output of an external power supply that provides a supply voltage for the electronics, in order to supply the load circuit with electrical power from the mains.
  • the supply circuit also has at least one rechargeable energy store for electrical energy and the supply circuit is also set up to apply a cell voltage of the energy store or a voltage proportional to it to the circuit output and to supply the load circuit with electrical energy, for example if the circuit input is not connected to an external power supply.
  • the aforementioned energy store is by means of a capacitor, for. B. a double layer capacitor, or by means of a secondary battery, e.g. B.
  • LiFe-P04 lithium iron phosphate battery
  • LiTe-P04 lithium titanate battery
  • Li cobalt nickel oxide battery lithium manganese oxide battery
  • LiPoly lithium polymer battery
  • LiPoly lithium polymer battery
  • Sodium-sulfur accumulator or a nickel-metal hydride accumulator a lithium iron phosphate battery (LiFe-P04), a lithium titanate battery, a lithium cobalt nickel oxide battery, a lithium manganese oxide battery, a lithium polymer battery (LiPoly), a Sodium-sulfur accumulator or a nickel-metal hydride accumulator.
  • those error states are to be classified as particularly critical for the operational safety of the electronics or of the measuring device formed with it, in which those at the circuit input of the supply circuit applied (mains) voltage reaches the internal energy store undesirably, in such a way that it is permanently exposed to an overvoltage, namely a charging voltage exceeding a maximum permissible voltage, namely for overcharging, possibly also a Destruction of the energy store has been applied for a sufficiently long time.
  • Such a fault condition can arise, for example, if, due to a failure of individual components of the electronics, any further charged energy storage devices, such as capacitors, the electronics and / or the external voltage, are connected to the energy storage device. Destruction of the internal energy store can also lead to a total failure of the entire electronics, and consequently of the measuring device formed therewith.
  • one object of the invention is to protect a rechargeable energy store provided in line-fed electronics against an overvoltage that may also destroy it.
  • the invention consists in electronics, for example electronics for a measuring device, which electronics comprise:
  • a load circuit having, for example, at least one microprocessor and / or at least one linear voltage regulator with a circuit input;
  • a supply circuit formed for example by means of one or more DC voltage converters, with a circuit input, with a first circuit output, with a second circuit output and with at least one rechargeable, for example chemical or electrochemical, energy storage device for electrical energy, for example a supercapacitor;
  • the rechargeable energy store is electrically connected to the second circuit output of the supply circuit in such a way that the cell voltage of the rechargeable energy store or a voltage proportional to it is applied to the second circuit output
  • the circuit input of the load circuit is at least temporarily, for example permanently, electrically connected to the first circuit output of the supply circuit in such a way that when the output voltage is applied to the first circuit output of the supply circuit, a current flow, for example with a current strength of more than 100 mA (milliamps), from that first circuit output to that circuit input and / or one, for example more than 2000 Ws / h (watt-second per hour), the flow of energy from the supply circuit to the load circuit is enabled.
  • the circuit output of the protective circuit is electrically connected to the circuit input of the supply circuit and is the first circuit input of the Protection circuit also set up to be electrically connected to a circuit output of an external power supply providing a supply voltage, for example with a nominal value between 4 V and 60 V, for the electronics, and wherein the second circuit input of the protection circuit is electrically connected to the second circuit output of the supply circuit is connected in such a way that an input voltage applied to that second circuit input corresponds to the cell voltage provided by the rechargeable energy store.
  • both the supply circuit and the protective circuit each have at least two operating modes.
  • a first operating mode of the supply circuit its rechargeable energy store is switched through to the first circuit output in such a way that the cell voltage provided by the energy store or a voltage proportional to it is applied as a first output voltage at the first circuit output, and in a second operating mode of the supply circuit its circuit input is open whose first circuit output is switched through, for example in such a way that an input voltage applied to that circuit input is converted into a second output voltage applied to the first circuit output with a constant and / or predeterminable voltage level and / or that with an input voltage applied to that circuit input, a current flow from that circuit input to the first circuit output is enabled.
  • first circuit input is switched through to its circuit output, for example in such a way that, when a voltage is applied to the first circuit input, a current flow from that first circuit input to its circuit output or an energy flow from the protective circuit to the supply circuit is and are enabled
  • first circuit input and the circuit output are electrically isolated from one another, for example in such a way that even with a voltage of more than 4 V and less than 60 V applied to the first circuit input, only a current flow with a current of at most 100 mA (Microampere) from namely the first circuit input to the circuit output and / or only an energy flow of a maximum of 20 Ws / h (watt-second per hour) from the protective circuit to the supply circuit is made possible.
  • the protective circuit of the electronics according to the invention is set up to monitor the cell voltage applied to the second circuit input in the first operating mode to determine whether its voltage level has exceeded a maximum value specified for it, for example less than 0.2 V above its nominal value, and possibly automatically deactivate first operating mode, for example at the same time to activate their second operating mode or to automatically switch from their first operating mode to their second operating mode.
  • a maximum value specified for it for example less than 0.2 V above its nominal value
  • the invention also consists in a measuring system formed with such electronics, which also includes a measuring transducer electrically coupled to the electronics, the is set up to detect at least one, for example physical or chemical, measured variable and to convert it into at least one measurement signal representing the same measured variable.
  • the electronics of the invention it is further provided that in the second operating mode of the supply circuit its rechargeable energy store is not switched through to the first circuit output, in such a way that its rechargeable energy store and its first circuit output are electrically isolated from one another or that the from rechargeable energy storage provided cell voltage is not applied to the first circuit output.
  • the electronics of the invention it is further provided that in the first operating mode of the protective circuit its first circuit input is switched through to its circuit output, in such a way that with a voltage applied to the first circuit input, for example with a voltage level of more than 4 V, a current flow namely from the first circuit input to its circuit output, for example with a current strength of more than 100 mA, and / or, for example, more than 1000 Ws / h, energy flow from the protective circuit to the supply circuit is enabled.
  • a voltage applied to the first circuit input for example with a voltage level of more than 4 V
  • a current flow namely from the first circuit input to its circuit output for example with a current strength of more than 100 mA, and / or, for example, more than 1000 Ws / h
  • the electronics of the invention it is further provided that in the second operating mode of the protective circuit its first circuit input and its circuit output are electrically isolated from one another, so that even when the voltage applied to the first circuit input has a voltage level of more than 4 V and / or less than 60 V and / or to a circuit output of an external power supply electrically connected first circuit input delivering a supply voltage with a voltage level between 4 V and 60 V, only a current flow with a current strength of at most 100 mA (microamps) from namely the first circuit input to the circuit output and / or only an energy flow of a maximum of 20 Ws / h (watt-second per hour) from the protective circuit to the supply circuit is enabled.
  • mA microamps
  • the supply circuit is set up to automatically activate the first operating mode, for example to start automatically if the cell voltage of the rechargeable energy store is a predetermined, for example more than 105% of a final discharge voltage of the rechargeable Energy store corresponding, minimum value not falling below voltage level, for example, namely if no input voltage is applied to the circuit input or an input voltage applied to the circuit input has a voltage level lying below a predetermined minimum value.
  • the supply circuit is set up to automatically activate the second operating mode, for example to start automatically or to automatically switch from the first operating mode to the second operating mode if an input voltage applied to the circuit input has a predetermined, for example above 4 V, the minimum value does not fall below the voltage level.
  • the supply circuit is set up to automatically deactivate the second operating mode if there is no input voltage at the circuit input or an input voltage at the circuit input has a voltage level below a predetermined minimum value.
  • the protective circuit for monitoring the cell voltage has a comparator, formed for example by means of at least one differential amplifier, with a first voltage input, with a second voltage input and with a signal output, and that the first circuit input is the Protection circuit is formed by means of the first voltage input of the comparator and the second circuit input of the protection circuit is formed by means of the second voltage input of the comparator.
  • the protective circuit is set up to activate its first operating mode or its second operating mode based on a signal level at the signal output of the comparator.
  • the supply circuit has a first DC / DC converter, for example designed as an up converter or as an inverse converter, and that an input of the first DC / DC converter is electrically connected to the at least one rechargeable energy store and the first circuit output is the Supply circuit is formed by means of an output of the first DC voltage converter.
  • the supply circuit has a second DC voltage converter, for example designed as a step-down converter, and that the circuit input of the supply circuit is formed by means of an input of the second DC voltage converter and the first circuit output of the supply circuit is formed by an output of the second DC voltage converter is.
  • a second DC voltage converter for example designed as a step-down converter
  • the at least one rechargeable energy store has first and second connection electrodes.
  • the supply circuit has first and second contact elements for at least one rechargeable energy store and that the rechargeable energy store, for example releasably, is connected to the same contact elements, such that the first connection electrode of the again chargeable energy store, the first contact element and the second connection electrode of the rechargeable energy store, the second contact element electrically conductively contacted.
  • the supply circuit can also have at least one, for example manually operable, switch, for example a DIP switch or DIL switch, with first and second connection contacts and with one, for example manually operable, switching contact, which switch in turn with its first connection contact with the first contact element can be electrically connected and configured to selectively establish or disconnect an electrically conductive connection between the first contact element and the second connection contact by means of the switching contact, for example to only have at least one rechargeable energy storage device when required and / or during commissioning of the electronics in incorporate the supply circuit.
  • switch for example a DIP switch or DIL switch
  • the supply circuit has at least one non-rechargeable energy store, for example a lithium thionyl chloride battery, for electrical energy, for example connected electrically in parallel with the rechargeable energy store.
  • non-rechargeable energy store for example a lithium thionyl chloride battery
  • the at least one non-rechargeable energy store has a nominal capacity of more than 10 Ah (ampere hours), and / or that the at least one non-rechargeable energy store has a cell voltage with a nominal value of more than 3 V and / or less than 4 V, for example from 3.6 V, and / orthat the at least one non-rechargeable energy store is designed as a D-cell (IEC R20), and / orthat the at least one non-rechargeable energy store is set up to charge the rechargeable energy store.
  • IEC R20 D-cell
  • the nominal value of the cell voltage (V_BAT) of the at least one rechargeable energy store is less than 4V.
  • the nominal capacity of the at least one rechargeable energy store is greater than 400 As and / or less than 1000 As.
  • the at least one rechargeable energy store is designed as an AA cell (IEC R6, Mignon cell).
  • the supply circuit has a third operating mode, and that the supply circuit is set up to convert the cell voltage provided by the energy store into a third output voltage applied to the first circuit output in the third operating mode, for example in such a way that the The voltage level of the third output voltage is higher than the voltage level of the cell voltage and / or that the voltage level of the output voltage is below the nominal value of the cell voltage and / or that the voltage level of the output voltage is lower than the voltage level of the second output voltage when the supply circuit is operating in the second operating mode.
  • the supply circuit is set up to automatically activate the third operating mode as soon as the cell voltage provided by the energy store is below a predetermined value, for example less than 3.3 V and / or more than 80% of the nominal value , Has the minimum value lying voltage level.
  • the electronics are set up to receive and evaluate the at least one measuring signal, for example to determine the least one measured variable quantifying measured values using the same measuring signal.
  • the load circuit of the electronics has a converter module which is set up based on the at least one measuring signal to determine the measured variable quantifying, for example digital, measured values.
  • the load circuit of the electronics has a radio module coupled to the converter module which is set up to output measured values determined by the converter module by means of a radio signal.
  • a basic idea of the invention is to detect any fault condition within the electronics, in particular within their supply circuit, as early and reliably as possible in a hybrid, namely partially mains and partially battery-powered electronics by using the cell voltage of the battery supply of the electronics is monitored at least partially ensuring rechargeable energy storage.
  • any error states can also be recognized with sufficient time in advance to be able to initiate further measures that serve to avoid destruction of the electronics, for example separating the electronics from the external ones Energy supply and / or a dedicated separation of the energy storage circuits within the electronics.
  • a further advantage of the invention is also the fact that numerous error states, which are typically topologically distributed within the respective electronics, can be monitored very easily and reliably using just one operating parameter.
  • FIG. 1 shows, schematically, in the manner of a block diagram, an exemplary embodiment of electronics according to the invention
  • FIGS. 2 and 3 schematically in the manner of a block diagram of embodiments of a supply circuit of an electronics according to FIG. 1;
  • FIG. 4 shows, schematically, in the manner of a block diagram, a further embodiment of a supply circuit of an electronics according to FIG. 1.
  • the electronics according to the invention can, for example, be part of a communication system additionally having a signal receiver that is electrically connected to the electronics, possibly also arranged remotely.
  • the signal receiver can be, for example, a remote control (remote I / O), a programmable logic controller (PLC), a bus master in a field bus, for example in accordance with the industrial standard IEC 61158: 1999, in particular in accordance with one of the CPF1 families (FOUNDATION FIELDBUS ), CPF3 (PROFIBUS), CPF9 (HART) or CPF15 (MODBUS), whereby the signal receiver can be mains and / or battery powered.
  • a remote control remote control
  • PLC programmable logic controller
  • a bus master in a field bus for example in accordance with the industrial standard IEC 61158: 1999, in particular in accordance with one of the CPF1 families (FOUNDATION FIELDBUS ), CPF3 (PROFIBUS), CPF9 (HART) or CPF
  • the electronics can also be part of a measuring system - for example, namely a measuring and / or switching device in industrial measurement and automation technology - with a measuring transducer MA electrically coupled to the electronics, such as a Flow measuring transducer, which in turn is set up to detect at least one physical or chemical measured variable, for example a flow and / or a material parameter of a measured substance flowing in a pipeline, and to deliver at least one measurement signal s1 representing the same measured variable, esp. namely to provide for processing in electronics.
  • the electronics can also be set up to receive the same measurement signal s1 and to process it accordingly, for example namely to determine the at least one measurement variable, possibly digital measurement values.
  • a measuring system for example, namely a measuring and / or switching device in industrial measurement and automation technology - with a measuring transducer MA electrically coupled to the electronics, such as a Flow measuring transducer, which in turn is set up to detect at least one physical or chemical measured variable, for example a flow and / or a
  • the electronics can be arranged within a protective housing H, which can also be attached, for example, directly to the aforementioned measuring transducer MA, forming a measuring device in a compact design.
  • the load circuit has a converter module formed, for example, by means of a microcontroller (pC), which is set up to determine the at least one measured variable quantifying, for example digital, measured values based on the aforementioned at least one measurement signal s1.
  • the load circuit of the electronics can, for example, also have a radio module coupled to the converter module, which is set up to output measured values determined by the converter module by means of a radio signal.
  • the aforementioned converter module can also be used be set up to output the measured values in a wired manner, for example by means of an analog current signal or a digital signal, possibly conforming to one of the aforementioned field buses, to the aforementioned signal receiver.
  • the electronics according to the invention have a load circuit M1 with a circuit input, a supply circuit M2 with a circuit input, with a first circuit output, with a second circuit output and with at least one, in particular chemical or electrochemical, rechargeable energy store HLC for electrical energy, for example a supercapacitor on.
  • the load circuit M1 can, as also indicated in FIG. 1, be formed, for example, by means of at least one microcontroller pC and / or at least one linear voltage regulator LDO.
  • the energy store HLC of the supply circuit M2 has a nominal capacity, for example 400 As (ampere seconds), and is set up to be fully charged, i.e. at a state of charge (SoC - State of Charge) of 100%, a cell voltage V_BAT with a nominal value, for example of 3.6 V (volts), to provide voltage level.
  • the energy store HLC is electrically connected to the second circuit output of the supply circuit M2 in such a way that the cell voltage V_BAT of the energy store HLC or a voltage proportional to it is applied to the second circuit output.
  • the energy store HLC can also have first and second connection electrodes and the supply circuit M2 can have corresponding, namely electrically connected to the second circuit output or have this at least partially also forming first and second contact elements for at least one energy store HLC.
  • the energy store HLC for example also releasably, is connected to the aforementioned contact elements in such a way that the first connection electrode of the energy store HLC makes electrically conductive contact with the first contact element and the second connection electrode of the energy store HLC with the second contact element .
  • the supply circuit M2 also has at least one switch DIL, especially one that can be operated manually.
  • switch DIL has first and second connection contacts and a switch contact, optionally manually operable, and is electrically connected with its first connection contact to the first contact element of the energy store HLC.
  • the switch DIL is set up to selectively establish or close an electrically conductive connection between the first contact element and the second connection contact by means of its switch contact separate, for example in order to incorporate the energy store HLC into the supply circuit only when required and / or during commissioning of the electronics.
  • the connection electrodes of the energy store HLC and the contact elements of the supply circuit M2 can also be set up, for example, to establish a fixed, yet releasable mechanical connection between the energy store HLC and the supply circuit M2.
  • the circuit input of the load circuit M1 is at least temporarily, possibly also permanently, electrically connected to the first circuit output of the supply circuit M2, in such a way that when the output voltage (V_SEK1; V_SEK2) is applied to the first circuit output of the supply circuit M2 a current flow from namely the first circuit output to namely the circuit input and / or a flow of energy from the supply circuit M2 to the load circuit M1 is enabled; this in particular in such a way that the aforementioned current flow at an output voltage in the range between 2 V and 4 V has a current strength of more than 100 mA (milliamps) and / or the aforementioned energy flow more than 2000 Ws / h (watt-second per hour ) is.
  • the electronics according to the invention also include a protective circuit Mx.
  • the protective circuit Mx has a first circuit input, a second circuit input and a circuit output.
  • the circuit output of the protective circuit Mx is electrically connected to the circuit input of the supply circuit M2.
  • the first circuit input of the protective circuit Mx is set up to be electrically connected to a circuit output of an external power supply EV providing a supply voltage V_EXT, for example a DC supply voltage, for the electronics, and is the second circuit input of the protective circuit Mx with the second circuit output of the supply circuit M2 electrically connected in such a way that an input voltage applied to the second circuit input corresponds to the cell voltage V_BAT provided by the energy store HLC.
  • the supply circuit M2, and therefore the electronics formed with it is set up according to a further embodiment to be operated with a supply voltage V_EXT, in particular a DC supply voltage, having a nominal value (nominal voltage) between 4 V and 60 V.
  • both the supply circuit and the protective circuit each have at least two operating modes (M2i, M2n; Mxi, Mxn), namely a first operating mode M2i or Mxi , and at least one second operating mode, namely an operating mode M2n or Mxn, on.
  • the electronics according to the invention it is also provided that in the first operating mode Mxi of the protective circuit Mx its first circuit input is switched through to its circuit output; this in particular in such a way that, when a voltage is applied to the first circuit input, a current flow from namely the first circuit input to its circuit output or an energy flow from the protective circuit to the supply circuit is enabled; this in particular also in such a way that in the first operating mode operating protective circuit and at the same time operating in the second operating mode supply circuit M2 a second load circuit of the electronics is closed, the one from the first circuit input of the protective circuit Mx, further via its circuit output to the first circuit input of the supply circuit M2 and further involved via their circuit output to the circuit input of the load circuit M1 leading current path.
  • the protective circuit Mx In the second operating mode Mxn of the protective circuit Mx, in turn, its first circuit input and its circuit output are electrically isolated from one another; this in particular in such a way that even with a voltage applied to the first circuit input with a voltage level of more than 4 V and less than 60 V, only a current flow with a current strength of at most 100 mA (microamps) from namely the first circuit input to the circuit output and / or only an energy flow of a maximum of 20 Ws / h (watt-second per hour) from the protective circuit to the supply circuit is possible.
  • mA microamps
  • the Protective circuit Mx of the electronics according to the invention set up in the first operating mode to monitor the cell voltage present at the second circuit input to determine whether its voltage level has exceeded a maximum value UHLC specified for it, for example less than 0.2 V above its nominal value.
  • protective circuit Mx is set up to automatically deactivate its first operating mode, for example at the same time to activate its second operating mode or to automatically switch from its first operating mode to its second operating mode, if it is determined during the aforementioned monitoring of the cell voltage of the energy store HLC that the cell voltage reaches the aforementioned maximum value ÜHLC has exceeded.
  • the protective circuit Mx also has a comparator, formed for example by means of at least one differential amplifier, with a first voltage input, with a second voltage input and with a signal output (nominally only having two states).
  • the first circuit input of the protective circuit can be and can be formed by means of the first voltage input of the comparator, possibly also with the interposition of a voltage regulator and / or one or more Zener diodes that provides a reference voltage derived from the supply voltage V_EXT and / or further stabilized
  • the second circuit input of the protective circuit can be formed by means of the second voltage input of the comparator, possibly also with the interposition of a voltage divider for the cell voltage V_BAT.
  • the protective circuit Mx can be set up to activate its first operating mode or its second operating mode based on a signal level at the signal output of the comparator; this in particular in such a way that immediately after a change to a signal level signaling that the cell voltage has exceeded the maximum value UHLC at that signal output, the second operating mode of the protective circuit is activated.
  • a current flow from that first circuit input to its circuit output with a current strength of more than 100 mA or a more than 1000 Ws / h of energy flow from the protective circuit Mx to the supply circuit M2 is enabled, and / or it is provided that in the second operating mode of the protective circuit only a current flow with a current strength of at most 100 mA (microamps) from the first circuit input to the circuit output and / or only an energy flow of a maximum of 20 Ws / h (watt-second per hour) from the protection circuit to the supply circuit is enabled; This not least also for the case that a voltage with a voltage level of more than 4 V and / or less than 60 V is applied to the first circuit input and / or that the first circuit input of the protective circuit Mx is connected to a supply voltage with a voltage between 4 V and 60 V lying
  • the supply circuit M2 is also set up to automatically activate the first operating mode, for example that is also to start automatically after connecting the energy store HLC or after actuating the aforementioned switch DIL; This is particularly the case if the cell voltage of the energy store HLC has a voltage level that does not fall below a predetermined value, for example more than 105% of a final discharge voltage of the energy store HLC, and / or if no input voltage (any longer) is present at the circuit input or an input voltage is present at the circuit input has a voltage level below a predetermined minimum value.
  • a predetermined value for example more than 105% of a final discharge voltage of the energy store HLC
  • the supply circuit M2 can also be set up to automatically activate the second operating mode, for example to automatically start up or to automatically switch from the first operating mode to the second operating mode if an input voltage applied to the circuit input is a predetermined one, for example above 4 V. and / or the supply circuit can be set up to automatically deactivate the second operating mode if there is no input voltage at the circuit input or an input voltage at the circuit input has a voltage level below a predetermined minimum value.
  • the input voltage or its correct voltage level and / or the aforementioned (minimum) voltage level of the cell voltage can in turn be detected by means of one or more comparators, for example each formed by one or more differential amplifiers, provided in the supply circuit.
  • the supply circuit M2 has, in addition to the two aforementioned operating modes M2i and M2n, a further, third operating mode M2m, such that the supply circuit M2 is set up, namely the cell voltage provided by the energy store HLC in the third operating mode M2m To convert V_BAT into a third output voltage V_SEK3 present at the first circuit output of the supply circuit M2; this in particular in such a way that the voltage level of the output voltage V_SEK3 is higher than the voltage level of the cell voltage V_BAT of the energy store HLC or below the nominal value of the cell voltage V_BAT.
  • the voltage level of the output voltage V_SEK3 provided by the supply circuit in the third operating mode can also differ from the respective voltage level of the output voltage V_SEK1 or V_SEK2 provided in the first operating mode and / or in the second operating mode, in particular such that the voltage level of the Output voltage V_SEK3 is lower than the voltage level of the output voltage V_SEK2 when the supply circuit operates in the second operating mode.
  • the supply circuit can also do this be set up to automatically activate the third operating mode as soon as the cell voltage V_BAT provided by the energy store HLC has a voltage level below a predetermined minimum value.
  • the aforementioned minimum value can be set to less than 3.3 V and / or more than 80% of the nominal value, for example.
  • the supply circuit has a (first)
  • the DC voltage converter BOOST in such a way that, as shown schematically in Fig. 2, an input of the DC voltage converter BOOST with the at least energy store HLC and the first circuit output of the supply circuit M2 by means of an output of the same DC voltage converter BOOST, but especially the second circuit output of the supply circuit M2 not is formed by means of the output of the DC voltage converter BOOST.
  • the DC voltage converter BOOST can advantageously be designed, for example, as a step-up converter or as an inverse converter.
  • the supply circuit M2 can furthermore, as also shown schematically in FIG. 3, convert the same input voltage V_EXT in the output voltage V_SEK2 provided at the first circuit output supply circuit M2, for example designed as a step-down converter, second DC voltage converter BUCK, such that the circuit input of the supply circuit M2 by means of an input of the DC voltage converter BUCK and the first circuit output of the supply circuit M2 by means of an output of the DC voltage converter BUCK is formed.
  • the supply circuit M2 also has the DC voltage converter BOOST, as also indicated in FIGS. 2 and 3, its output and the output of the DC voltage converter BUCK can be electrically connected to one another.
  • the energy store HLC has a nominal capacity of more than 400 As (ampere seconds), in particular of more than 500 As, and the energy store HLC is fully charged, i.e. at one
  • the nominal capacity of the at least one rechargeable energy store HLC can possibly also be less than 1000 As.
  • the nominal value of the cell voltage V_BAT of the energy store HLC can also be less than 4 V, for example.
  • the supply circuit M2 in the first operating mode M2i with the supply circuit M2, or the electrical power thus available within the electronics, the supply circuit M2, as shown schematically in FIG Energy storage HLC electrically connected in parallel, non-rechargeable energy storage LTC for electrical energy, for example a lithium thionyl chloride battery.
  • the aforementioned energy storage device LTC has a nominal capacity of more than 10 Ah (ampere hours) and / or a cell voltage with a nominal value of more than 2.4 V and / or less than 3.9 V. having voltage level provides.
  • the energy store LTC can be designed, for example, as a D-cell (IEC R20) and / or can also be set up to charge the rechargeable energy store LTC accordingly when required.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

L'électronique selon l'invention comprend un circuit de charge (M1) ayant une entrée de circuit (M1.1), un circuit d'alimentation (M2) ayant une entrée de circuit (M2.1), ayant deux sorties de circuit (M2.2), (M2.3) et au moins un accumulateur d'énergie rechargeable (HLC) pour l'énergie électrique, ledit accumulateur d'énergie rechargeable étant électriquement connecté à la sortie de circuit (M2.3) du circuit d'alimentation (M2) de telle sorte qu'une tension de cellule (V_BAT) de l'accumulateur d'énergie (HLC) ou une tension proportionnelle à celle-ci est appliquée à travers cette sortie de circuit, et un circuit de protection (Mx) ayant deux entrées de circuit (Mx.1), (Mx.2) et une sortie de circuit (Mx.3). L'entrée de circuit (Mx.2) est électriquement connectée à la sortie de circuit (M2.3) de telle sorte qu'une tension d'entrée à travers ladite entrée de circuit (Mx.2) correspond à la tension de cellule (V_BAT) fournie par l'accumulateur d'énergie (HLC). De plus, l'entrée de circuit (M1.1) est au moins temporairement connectée électriquement à la sortie de circuit (M2.2) de telle sorte que, lorsqu'une tension de sortie (V_SEK1 ; V_SEK2) est appliqué à travers la sortie de circuit (M2.2), un flux d'énergie provenant du circuit d'alimentation (M2) vers le circuit de charge (M1) est activé, et la sortie de circuit (Mx.3) est connectée électriquement à l'entrée de circuit (M2.1). L'entrée de circuit (Mx1) est conçue pour être connectée électriquement à une sortie de circuit d'une alimentation en énergie externe (EV) fournissant une tension d'alimentation (V_EXT). Le circuit d'alimentation (M2) et le circuit de protection (Mx) ont chacun au moins deux modes de fonctionnement (M2I, M2II ; MxI, MxII). Dans un mode de fonctionnement (M2I), l'accumulateur d'énergie (HLC) est relié à la sortie de circuit (M2.2) de telle sorte que la tension de cellule fournie par l'accumulateur d'énergie ou une tension proportionnelle à celle-ci est appliquée sous la forme d'une tension de sortie (V_SEK1) à travers la sortie de circuit (Mx.3) (V_BAT = V_SEK1), et dans le mode de fonctionnement (M2II), l'entrée de circuit (M2.1) est interconnectée à la sortie de circuit (M2.3). Dans le mode de fonctionnement (Mxl), à son tour, l'entrée de circuit (Mx.1) est reliée à la sortie de circuit (Mx.3), tandis que l'entrée de circuit (Mx.1) et la sortie de circuit (Mx.3) sont électriquement séparées l'une de l'autre dans le mode de fonctionnement (MxII). En outre, le circuit de protection (Mx) est conçu pour surveiller la tension de cellule appliquée à travers l'entrée de circuit (Mx.2) dans le mode de fonctionnement (MxI) selon que le niveau de tension a dépassé une valeur maximale (ÛHLC) spécifiée pour celui-ci et, le cas échéant, pour désactiver automatiquement le mode de fonctionnement (MxII).
EP20820078.2A 2019-12-20 2020-12-01 Alimentation en tension hybride pour un instrument de mesure Pending EP4078762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019135585.0A DE102019135585A1 (de) 2019-12-20 2019-12-20 Elektronik
PCT/EP2020/084101 WO2021121967A1 (fr) 2019-12-20 2020-12-01 Alimentation en tension hybride pour un instrument de mesure

Publications (1)

Publication Number Publication Date
EP4078762A1 true EP4078762A1 (fr) 2022-10-26

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Application Number Title Priority Date Filing Date
EP20820078.2A Pending EP4078762A1 (fr) 2019-12-20 2020-12-01 Alimentation en tension hybride pour un instrument de mesure

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US (1) US20230020549A1 (fr)
EP (1) EP4078762A1 (fr)
CN (1) CN114868318A (fr)
DE (1) DE102019135585A1 (fr)
WO (1) WO2021121967A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2768527B1 (fr) * 1997-09-18 2000-07-13 Sgs Thomson Microelectronics Regulateur de tension
US7372234B2 (en) * 2001-12-11 2008-05-13 Rohm Co., Ltd. Charge control device and battery pack employing it
US11201500B2 (en) * 2006-01-31 2021-12-14 Mojo Mobility, Inc. Efficiencies and flexibilities in inductive (wireless) charging
DE102008029956A1 (de) * 2008-06-26 2009-12-31 Endress + Hauser Flowtec Ag Meßsystem mit einem Sensormodul und einem Transmittermodul
JP5447260B2 (ja) * 2010-02-11 2014-03-19 株式会社デンソー 電池電圧監視装置
DE102013104139A1 (de) * 2013-04-24 2014-10-30 Endress + Hauser Process Solutions Ag Verfahren und Vorrichtung zur Inbetriebnahme eines Feldgerätes
JP6194682B2 (ja) * 2013-08-01 2017-09-13 富士電機株式会社 電流計測装置
JP6286936B2 (ja) * 2013-08-22 2018-03-07 富士電機株式会社 電源回路装置、電流計測装置、電力監視システム、並びに電源回路装置の保護方法

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CN114868318A (zh) 2022-08-05
DE102019135585A1 (de) 2021-06-24
WO2021121967A1 (fr) 2021-06-24
US20230020549A1 (en) 2023-01-19

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