WO2012133186A1 - Unité de commande de circuit de commutation, et système de chargement et de déchargement - Google Patents

Unité de commande de circuit de commutation, et système de chargement et de déchargement Download PDF

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Publication number
WO2012133186A1
WO2012133186A1 PCT/JP2012/057516 JP2012057516W WO2012133186A1 WO 2012133186 A1 WO2012133186 A1 WO 2012133186A1 JP 2012057516 W JP2012057516 W JP 2012057516W WO 2012133186 A1 WO2012133186 A1 WO 2012133186A1
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WO
WIPO (PCT)
Prior art keywords
signal
switch circuit
unit
light
switch
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Application number
PCT/JP2012/057516
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English (en)
Japanese (ja)
Inventor
中島　武
健仁 井家
久志 中林
博志 佐伯
Original Assignee
三洋電機株式会社
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Publication of WO2012133186A1 publication Critical patent/WO2012133186A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/785—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling field-effect transistor switches
    • 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
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
    • H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
    • H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors

Definitions

  • the present invention relates to a switch circuit control unit and a charge / discharge system, and more particularly to a switch circuit control unit that controls a switch circuit that switches connection between a power input / output line and a power storage unit, and a charging circuit that includes the switch circuit control unit. It relates to a discharge system.
  • a power generation device using renewable energy such as sunlight or wind power is not suitable for use as a stable power source because of large fluctuations in generated power, and leveling of generated power is desired.
  • load leveling of electric power demand is expected.
  • the power supply system charges the storage battery with power from a power source such as a power generator or power system that uses renewable energy, charges and discharges the storage battery as necessary, and supplies power to the load or power system.
  • a power source such as a power generator or power system that uses renewable energy
  • a switch circuit for controlling charging / discharging of the storage battery is provided between the storage battery and a power input / output line connected to a power source, a load, a power system, or the like.
  • Patent Document 1 discloses a system in which a charge / discharge switch is provided in a power storage device connected between a main power supply and a load.
  • an FET is used as a charge / discharge switch, one end of which is connected to the positive electrode side of the power storage device, and the other end is connected to a connection point where the main power source and the load are connected.
  • the degree of freedom in selecting the storage battery capacity and the load capacity that can be connected is high. Therefore, the switch circuit is required to be able to perform a switch operation even under a high current and a high voltage.
  • Patent Document 1 when an FET is used as a switch circuit, damage may occur due to heat generation during switch operation under a large current and high voltage. In order to suppress such breakage, use of a high function FET, addition of a cooling function, etc. can be considered. However, it is not practical because the types of FETs that can be selected are limited, and when the cooling function is added, the entire system becomes large.
  • An object of the present invention is to provide a switch circuit control unit that suppresses heat generation during switch operation, and a charge / discharge system including the switch circuit control unit.
  • a switch circuit control unit is a switch circuit control unit that controls, based on a control signal, a switch circuit that switches connection between a power input / output line and a power storage unit including a storage battery.
  • a light emitting unit that emits light, a light receiving unit that outputs an on signal or an off signal according to light of the light emitting unit, and an on switch switching circuit that turns on a switch circuit when the on signal is input from the light receiving unit; And an off switch switching circuit that turns off the switch circuit when an off signal is input from the light receiving unit.
  • the switch circuit control unit has an insulating configuration including a light emitting unit that receives a control signal and a light receiving unit that outputs an on signal or an off signal according to the light of the light emitting unit. Furthermore, since the switch circuit control unit includes an off switch switching circuit and an on switch switching circuit, the switch circuit control unit can instantaneously switch on and off of the switch circuit, thereby suppressing heat generation due to the switch operation of the switch circuit, Breakage can be prevented.
  • FIG. 2 it is a figure explaining the structure of the charging / discharging system containing a switch circuit control part. It is a detailed block diagram of the switch circuit control part in embodiment which concerns on this invention.
  • FIG. 2 it is a figure explaining the effect
  • FIG. 2 it is a figure explaining the effect
  • a lithium ion battery is demonstrated as a storage battery which comprises an electrical storage part
  • secondary batteries other than this may be sufficient.
  • a nickel hydrogen battery, a nickel cadmium battery, or the like may be used.
  • the reason for collecting a plurality of unit storage batteries as an aggregate is to obtain a voltage and a current to correspond to the required power of the load, so the content of the combination of unit storage batteries for configuring the storage battery and its The number and the like can be appropriately determined according to the specifications of the charge / discharge system of the power storage unit.
  • solar power generated by a photoelectric conversion module and external commercial power will be described as a charging power source connected to the power storage unit, but other power sources such as wind power may be used.
  • factory equipment, an electronic device, and an illuminating device are described as discharge load connected with a storage battery, this is an illustration of various loads, and power consumption loads other than these may be sufficient.
  • FIG. 1 is a diagram for explaining a configuration of a charge / discharge system 10 including a switch circuit control unit 60.
  • the charge / discharge system 10 is a system that performs optimal charge / discharge control of the power storage unit 40 through power management between the power storage unit 40 including a storage battery, the charging power sources 12 and 14, and the discharge loads 16, 17, and 18. .
  • the charging power sources 12 and 14 include a photoelectric conversion module 12 and an external commercial power source 14.
  • the photoelectric conversion module 12 is a photoelectric conversion module in which a plurality of photoelectric conversion elements are combined. The characteristics when the photoelectric conversion module 12 is used as a charging power source are that the generated power value fluctuates depending on natural conditions, so that it is difficult to make the supplied power value constant and a large power fluctuation occurs in a short time. is there.
  • the external commercial power source 14 is a single-phase or three-phase AC power source, and is combined with power generated by various power generation methods such as hydroelectric power generation, nuclear power generation, and thermal power generation in accordance with fluctuations in power supply and demand. Supplied by a power company.
  • the charging power sources 12 and 14 can supply power to both the power storage unit 40 and the discharge loads 16, 17, and 18. However, the charging power sources 12 and 14 preferentially supply power to the power storage unit 40. When the voltage drops, power is supplied to the discharge loads 16, 17, and 18.
  • the discharge loads 16, 17, and 18 show a factory facility 16, an electronic device 17 such as a personal computer, and a lighting device 18.
  • Factory equipment 16 includes, in addition to mechanical equipment, factory air conditioning, kitchen appliances, factory lighting equipment, office equipment, and the like.
  • the discharge loads 16, 17, and 18 include various power consuming devices that can be connected to an outlet or the like. The characteristics of these discharge loads are that the power value fluctuates depending on the operating conditions, so that it is difficult to set the power consumption value to a constant value, and there is a possibility that sudden power fluctuations may occur depending on demand. .
  • the discharge loads 16, 17, 18 can receive power supply from any of the charging power sources 12, 14 and the power storage unit 40, but receive power supply from the power storage unit 40 preferentially, When the voltage drops, power is supplied from the charging power sources 12 and 14. Further, the discharge loads 16, 17, and 18 are again supplied with power from the power storage unit 40 when the amount of power stored in the power storage unit 40 is restored. Thus, even when the power supply from the charging power sources 12 and 14 and the power supply from the power storage unit 40 are switched, a large power fluctuation occurs in the charge / discharge power from the power storage unit 40.
  • the charging power supply side power converters 20A and 20B are converters such as an AC / DC converter and a DC / DC converter, and the type of converter to be used is selected according to the content of the conversion actually performed.
  • the charging power supply side power converter 20A provided between the photoelectric conversion module 12 and the power storage unit 40 can be omitted.
  • Discharge load side power converters 22a, 22b, and 22c provided between the discharge loads 16, 17, and 18 and the discharge load side switch 26 respectively convert power between the power storage unit 40 and the discharge loads 16, 17, and 18. I do.
  • the discharge load side power converters 22a, 22b, and 22c are DC / DC converters and DC / AC inverters, and appropriate ones are installed according to the load.
  • the load is a DC power source and the voltage can be directly driven by the storage battery voltage, the DC / DC converter can be omitted.
  • the power storage unit 40 is configured by combining a plurality of storage battery packs in which a predetermined number of storage battery cells are connected in series and parallel.
  • a lithium ion battery is preferably used as the storage battery cell.
  • the power storage unit 40 for example, a storage battery pack in which a plurality of storage battery cells are connected in series to obtain a desired voltage value, and a plurality of storage battery cells connected in series are connected in parallel so as to have a desired power value. Depending on the situation, multiple series-parallel connections are made.
  • the power input / output line 30 is a power line in which charging power is input to the power storage unit 40 from the charging power sources 12 and 14 side and discharging power is output to the discharging loads 16, 17 and 18 side.
  • the charging power supply side switch 24 provided between the power input / output line 30 and the charging power supplies 12 and 14 is a switch for turning on and off the supply of charging current from the charging power supplies 12 and 14 to the power storage unit 40.
  • a discharge load side switch 26 provided between the power input / output line 30 and the discharge loads 16, 17, 18 side is a switch for turning on / off the supply of discharge current from the power storage unit 40 to the discharge loads 16, 17, 18. .
  • the switch circuit 28 provided between the power input / output line 30 and the power storage unit 40 is a circuit including a switch that controls charging / discharging of the power storage unit 40.
  • the switch circuit 28 is provided on the positive electrode side of the power storage unit 40.
  • a p-channel FET is often used, and by using the p-channel FET, it is possible to use the negative side voltage of the power storage unit 40 at the control element end of the FET.
  • a simple circuit configuration is possible.
  • the p-channel FET has a slower switching speed than the n-channel FET and has a relatively large on-resistance. In the system as shown in FIG.
  • n-channel FET is used on the positive electrode side of the power storage unit 40.
  • a p-channel FET can also be used as the switch circuit 28 by appropriately changing the voltage relationship.
  • the switch circuit 28 is not limited to an FET, and a voltage control type switch circuit such as an IGBT may be used. In FIG. 1, only one switch circuit 28 is provided, but a plurality of switch circuits 28 may be connected in parallel.
  • the parallel-connected storage battery packs included in the power storage unit 40 may be connected to one switch circuit 28 in a state of being connected in parallel, or the switch circuit 28 may be connected to each parallel.
  • the electric current detection part which detects the charging / discharging electric current to a storage battery is provided.
  • the system control unit 50 acquires storage battery data related to the storage battery constituting the power storage unit 40.
  • the storage battery data is data indicating voltage, current, temperature, etc. for each storage battery. Further, the system control unit 50 is not shown, but the power detection unit provided between the charging power sources 12 and 14 and the discharge loads 16, 17, and 18, for example, changes the amount of fluctuation of the power value.
  • the detected power data shown is acquired.
  • the detected power data includes the power fluctuation caused by the photoelectric conversion module 12, the power fluctuation according to the demand of the discharge loads 16, 17, 18 and the power sources for the discharge loads 16, 17, 18 are the charging power sources 12, 14 and the power storage unit.
  • 40 includes data such as power fluctuations when switching to 40.
  • the system control unit 50 controls charging / discharging of the power storage unit 40 based on the acquired storage battery data and detected power data. Specifically, the system control unit 50 generates a control signal 91 to be transmitted to the charging power supply side switch 24 and the discharge load side switch 26 and a control signal 92 to be transmitted to the switch circuit 28 based on the storage battery data and the detected power data. To do. Then, the system control unit 50 controls the on / off of each switch by transmitting control signals 91 and 92 to the charging power supply side switch 24, the discharge load side switch 26, and the switch circuit 28, and performs charge / discharge control of the power storage unit 40. Do.
  • the control signal including an instruction to turn on each switch to the charging power supply side switch 24 and the switch circuit 28. 91 and 92 are transmitted, respectively.
  • the charging power supply side switch 24 and the switch circuit 28 are turned on, and the charging current supplied from the charging power supplies 12 and 14 is charged in the power storage unit 40.
  • the control signal including an instruction to turn on each switch to the discharge load side switch 26 and the switch circuit 28. 91 and 92 are transmitted, respectively.
  • the discharge load side switch 26 and the switch circuit 28 are turned on, and the discharge current from the power storage unit 40 is supplied to the discharge loads 16, 17 and 18.
  • the abnormality determination circuit 52 is a circuit that turns off the switch circuit 28 independently of the system control unit 50 when the power storage unit 40 has an abnormality.
  • the abnormality determination circuit 52 is provided between the power storage unit 40 and the system control unit 50, acquires storage battery data from the power storage unit 40, and when the power storage unit 40 is charged, the current of the power storage unit 40 is charged. Alternatively, whether or not the power storage unit 40 is in an abnormal state is determined based on whether or not at least one of the voltages exceeds a predetermined threshold value. Further, when the power storage unit 40 is discharged, whether or not the power storage unit 40 is in an abnormal state is determined based on whether or not at least one of the current or voltage of the power storage unit 40 is below a predetermined threshold value.
  • an overcharge threshold at which the power storage unit 40 is overcharged As the predetermined threshold, an overcharge threshold at which the power storage unit 40 is overcharged, an overdischarge threshold at which the power storage unit 40 is overdischarged, or the like can be used.
  • an abnormality signal 94 is output.
  • the abnormal signal 94 is directly transmitted to the switch circuit 28 without passing through the system control unit 50.
  • the abnormality determination circuit 52 can quickly turn off the switch circuit 28 without going through the system control unit 50 when the power storage unit 40 is in an abnormal state.
  • the switch circuit control unit 60 is a circuit that receives the control signal 92 from the system control unit 50 and controls on / off of the switch circuit 28.
  • the switch circuit control unit 60 includes a light emitting unit 66, a light receiving unit 68, an off switch switching circuit 70, and an on switch switching circuit 72.
  • the light emitting unit 66 emits light or does not emit light in response to the control signal 92.
  • the light receiving unit 68 outputs an on signal or an off signal according to the light of the light emitting unit 66.
  • the off switch switching circuit 70 outputs a first signal for turning off the switch circuit 28 to the switch circuit 28 when an off signal is input from the light receiving unit 68.
  • the on switch switching circuit 72 outputs a second signal for turning on the switch circuit 28 to the switch circuit 28 when an on signal is input from the light receiving unit 68.
  • the instruction included in the control signal 92 is transmitted to the switch circuit 28 in an insulated state.
  • the switch circuit control unit 60 includes a reference voltage terminal 62 and a plus voltage terminal 64.
  • the reference voltage terminal 62 supplies a reference voltage, which is a voltage that can turn off the switch circuit 28, to the off switch switching circuit 70 when an off signal is input from the light receiving unit 68 to the off switch switching circuit 70.
  • the positive voltage terminal 64 is a voltage that turns on the switch circuit 28 when an on signal is input from the light receiving unit 68 to the on switch switching circuit 72, and switches the switch circuit on voltage higher than the reference voltage to the plus voltage side. This is supplied to the switching circuit 72. With this configuration, the off switch switching circuit 70 can supply the reference voltage that can turn off the switch circuit 28 to the switch circuit 28 as the first signal.
  • the on-switch switching circuit 72 can supply the switch circuit on-voltage that can turn on the switch circuit 28 to the switch circuit 28 as the second signal.
  • the reference voltage is not limited to the ground voltage and may be a drain side voltage of the switch circuit 28 as long as the voltage can turn off the switch circuit 28.
  • FIG. 2 is a diagram illustrating an example of a specific internal configuration of the switch circuit control unit 60.
  • the switch circuit control unit 60 includes a photovoltaic circuit 80 including a light emitting diode as a light emitting unit 66 and a photoelectric conversion element as a light receiving unit 68, a diode 82, an n-channel transistor 84, and a p-channel transistor 86. .
  • the light emitting diode which is the light emitting unit 66 is supplied with a control signal 92 from the system control unit 50 between its two terminals.
  • the control signal 92 is a signal including an instruction to turn on the switch circuit 28
  • the light emitting diode that is the light emitting unit 66 enters a light emitting state and outputs light.
  • the control signal 92 is a signal including an instruction to turn off the switch circuit 28
  • the light emitting diode which is the light emitting unit 66 is in a non-light emitting state and does not output light.
  • a signal including an instruction to turn on the switch circuit 28 is referred to as an on instruction signal
  • a signal including an instruction to turn off the switch circuit 28 is referred to as an off instruction signal.
  • the control signal 92 When the control signal 92 is applied so as to forward bias the light emitting diode that is the light emitting unit 66, the light emitting unit 66 enters a light emitting state. That is, the ON instruction signal in the control signal 92 is a signal for forward-biasing the light emitting diode.
  • the ON instruction signal in the control signal 92 is a signal for forward-biasing the light emitting diode.
  • the cathode terminal of the light emitting diode is connected to the reference voltage terminal 67, applying a positive voltage to the anode terminal corresponds to the ON instruction signal.
  • a reference voltage may be applied to the anode terminal of the light emitting diode.
  • the photoelectric conversion element which is the light receiving unit 68 has the first terminal 68 a connected to the reference voltage terminal 62.
  • the second terminal 68 b is connected to the anode terminal of the diode 82, the base terminal of the n-channel transistor 84, and the base terminal of the p-channel transistor 86.
  • the photoelectric conversion element that is the light receiving unit 68 is disposed so that the light receiving surface thereof faces the light emitting surface of the light emitting diode that is the light emitting unit 66.
  • the photoelectric conversion element that is the light receiving unit 68 When the light emitting diode that is the light emitting unit 66 outputs light, the photoelectric conversion element that is the light receiving unit 68 generates power and outputs a predetermined voltage corresponding to the magnitude of the light from the second terminal 68b.
  • the photoelectric conversion element that is the light receiving unit 68 does not generate power, and the voltage of the second terminal 68b becomes the reference voltage.
  • the light receiving unit 68 outputs the reference voltage when the light emitting unit 66 is in the non-light emitting state, and outputs a predetermined voltage that is higher than the reference voltage when the light emitting unit 66 is in the light emitting state.
  • the output signal of the reference voltage corresponds to the off signal output from the light receiving unit 68 described in FIG. 1
  • the output signal of the predetermined voltage higher than the reference voltage corresponds to the on signal output from the light receiving unit 68.
  • the reference voltage that can be turned on increases.
  • the photoelectric conversion element included in the light receiving unit 68 of the photovol circuit 80 is slow in response. Therefore, if the boosting speed is slow, it takes time to turn on the switch circuit 28, and the n-channel FET may generate heat. Therefore, in order to compensate for the slow response of the photovoltaic circuit 80, an n-channel transistor 84 and a p-channel transistor 86 are provided, which will be specifically described below.
  • the diode 82 is connected to the second terminal 68b of the photoelectric conversion element whose anode terminal is the light receiving unit 68 as described above.
  • the cathode terminal is connected to the emitter terminal of the n-channel transistor 84, the emitter terminal of the p-channel transistor 86, and the control terminal of the n-channel FET that is the switch circuit 28.
  • the n-channel transistor 84 has a base terminal connected to the second terminal 68b of the photoelectric conversion element which is the light receiving unit 68 as described above, and an emitter terminal connected to the control terminal of the n-channel FET which is the switch circuit 28 as described above. Is done.
  • the collector terminal is connected to the positive voltage terminal 64.
  • the voltage supplied to the positive voltage terminal 64 is set to a voltage higher than the reference voltage. Since the base terminal is connected to the second terminal 68b of the light receiving unit 68, an ON signal or an OFF signal of the light receiving unit 68 is supplied.
  • the p-channel transistor 86 has a base terminal connected to the second terminal 68b of the photoelectric conversion element that is the light receiving unit 68 as described above, and an emitter terminal connected to the control terminal of the n-channel FET that is the switch circuit 28 as described above. Is done.
  • the collector terminal is connected to the reference voltage terminal 62. Since the base terminal is connected to the second terminal 68b of the light receiving unit 68, an ON signal or an OFF signal of the light receiving unit 68 is supplied.
  • the anode terminal of the light emitting diode which is the light emitting unit 66 in the switch circuit control unit 60 is connected to the output terminal of the photocoupler 90.
  • the photocoupler 90 is an element in which the light emitting surface of the light emitting diode and the light receiving surface of the phototransistor face each other.
  • the photocoupler 90 when the abnormality signal 94 output from the abnormality determination circuit 52 is input, the light emitting diode emits light, and the phototransistor is turned on by the light.
  • the output terminal of the photocoupler 90 becomes the reference voltage.
  • the output signal of the photocoupler 90 is transmitted to the anode terminal of the light emitting diode that is the light emitting unit 66 in the switch circuit control unit 60 as described above.
  • the switch circuit control unit 60 turns off the switch circuit 28 when the anode terminal of the light emitting diode reaches the reference voltage. That is, the photocoupler 90 is configured to control the switch circuit control unit 60 by receiving the abnormality signal 94 from the abnormality determination circuit 52 and controlling the light emitting unit 66.
  • FIG. 3 is a diagram for explaining the operation of the part of the off switch switching circuit 70 of the switch circuit control unit 60.
  • the off switch switching circuit 70 includes a diode 82 and a p-channel transistor 86.
  • the part of the off switch switching circuit 70 is extracted and shown on the right side of FIG.
  • the voltage of the second terminal 68b of the light receiving unit 68 is V S
  • the voltage of the control terminal of the switch circuit 28 is V G.
  • the diagram on the left side of FIG. 3 shows time variation of V S and V G , with time t on the horizontal axis and voltage V on the vertical axis.
  • the time when the control signal 92 changes from the on instruction signal to the off instruction signal is taken as the origin of time t.
  • the control signal 92 changes from the on instruction signal to the off instruction signal the light emitting unit 66 changes from the light emitting state to the non-light emitting state. Since the photoelectric conversion element of the light receiving unit 68 changes from the power generation state to the non-power generation state, the output voltage V S drops from a predetermined voltage higher than the reference voltage in the power generation state toward the reference voltage. However, the response of the photoelectric conversion element is rather slow, as shown in FIG. 3, V S does not change until time t 1, start falling from time t 1.
  • V G is the switch circuit on-voltage at the origin of the time axis because the n-channel FET which is the switch circuit 28 is on. Since the switch circuit ON voltage is discharged through the parasitic capacitance, the switch circuit ON voltage gradually becomes lower according to the discharge characteristics. As shown in FIG. 3, the voltage difference between V G and V S gradually decreases, and at time t 2 , the p-channel transistor 86 is turned on. As a result, V G instantaneously becomes the reference voltage. Thus, the voltage at the control terminal of the switch circuit 28 is switched from the switch circuit ON voltage to the reference voltage. Note that V G at time t 2 needs to be designed to maintain a voltage sufficient to turn on the switch circuit 28.
  • FIG. 4 is a diagram for explaining the operation of the on-switch switching circuit 72 of the switch circuit control unit 60.
  • the on switch switching circuit 72 includes a diode 82 and an n-channel transistor 84.
  • the part of the on-switch switching circuit 72 is extracted and shown on the right side of FIG.
  • the voltage at the output terminal of the light receiving unit 68 is V S
  • the voltage at the control terminal of the switch circuit 28 is V G.
  • the diagram on the left side of FIG. 4 shows time variations of V S and V G , with time t on the horizontal axis and voltage V on the vertical axis.
  • the time when the control signal 92 changes from the off instruction signal to the on instruction signal is taken as the origin of the time t.
  • the control signal 92 changes from the off instruction signal to the on instruction signal
  • the light emitting unit 66 changes from the non-light emitting state to the light emitting state.
  • the output voltage V S rises from the reference voltage in the non-power generation state toward a predetermined voltage higher than the reference voltage.
  • the response of the photoelectric conversion element is rather slow, as shown in FIG. 4, V S does not change until time t 3, it starts to increase from the time t 3.
  • V G is a reference voltage at the origin of the time axis because the n-channel FET which is the switch circuit 28 is off.
  • V S rises from t 3
  • a voltage is applied via the diode 82, so that V G also rises according to V S.
  • V G is lower than V S by the voltage drop of the diode 82
  • V S reaches a voltage capable of turning on the n-channel transistor 84
  • the n-channel transistor 84 is turned on and V G is instantaneous.
  • the switch circuit is turned on.
  • the voltage at the control terminal of the switch circuit 28 is switched from the reference voltage to the switch circuit ON voltage.
  • V G at time t 4 needs to be designed so as not to be a voltage for turning on the switch circuit 28.
  • the off switch switching circuit 70 when the control signal 92 changes from the on instruction signal to the off instruction signal, the voltage of the control terminal of the switch circuit 28 is instantaneously changed from the switch circuit on voltage to the reference voltage. Can be switched automatically. Further, by using the on switch switching circuit 72, when the control signal 92 changes from the off instruction signal to the on instruction signal, the voltage of the control terminal of the switch circuit 28 is instantaneously switched from the reference voltage to the switch circuit on voltage. be able to.
  • FIG. 5 is a diagram illustrating a configuration example of the switch circuit control unit 61 having another configuration.
  • This switch circuit control unit 61 uses a configuration in which a photodiode is used as the light emitting unit 66 and an n channel phototransistor 85 and a p channel phototransistor 87 are connected in series as the light receiving unit 68.
  • the collector of the n-channel phototransistor 85 is connected to the plus voltage terminal 64
  • the collector of the p-channel phototransistor 87 is connected to the reference voltage terminal 62.
  • the emitter of the n-channel phototransistor 85 and the emitter of the p-channel phototransistor 87 are connected to each other and connected to the control terminal of the switch circuit 28 as an output terminal. Therefore, the n-channel phototransistor 85 corresponds to the on-switch switching circuit 72, and the p-channel phototransistor 87 corresponds to the off-switch switching circuit 70.
  • the n-channel phototransistor 85 and the p-channel phototransistor 87 are turned on and off in a complementary manner.
  • the switch circuit control unit 61 receives the on instruction signal, the n-channel phototransistor 85 is turned on and the p-channel phototransistor 87 is turned off.
  • a positive voltage is instantaneously applied to the switch circuit 28, and the switch circuit 28 is turned on.
  • the switch circuit control unit 61 receives the off instruction signal, the p-channel phototransistor 87 is turned on and the n-channel phototransistor 85 is turned off.
  • the reference voltage is instantaneously applied to the switch circuit 28, and the switch circuit 28 is turned off.
  • the charge / discharge system 10 includes an off switch switching circuit 70 and an on switch switching circuit 72 in the switch circuit control unit 60.
  • the control signal 92 input to the switch circuit control unit 60 changes from the on instruction signal to the off instruction signal, or from the off instruction signal to the on instruction signal
  • the voltage of the control terminal of the switch circuit 28 is changed to the switch It is possible to instantaneously switch from the circuit on voltage to the reference voltage, or from the reference voltage to the switch circuit on voltage.
  • the switch circuit control unit 60 when the off switch switching circuit 70 and the on switch switching circuit 72 are not provided, the voltage at the control terminal of the switch circuit 28 changes relatively slowly, so that the switch circuit 28 is completely turned on.
  • the off switch switching circuit 70 and the on switch switching circuit 72 the voltage of the control terminal of the switch circuit 28 can be instantaneously switched, and thus heat generation due to the switch operation of the switch circuit 28 is suppressed. And can prevent damage.
  • the charge / discharge system 10 also includes an abnormality determination circuit 52 and a photocoupler 90 that cause the switch circuit control unit 60 to turn off the switch circuit 28 directly without going through the system control unit 50 when an abnormality occurs in the power storage unit 40. .
  • an abnormality determination circuit 52 and a photocoupler 90 transmit the abnormal state to the switch circuit control unit 60, the switch circuit 28 can be instantaneously turned off, thereby suppressing the influence of heat generation during the switch operation. it can.
  • the configuration in which the off switch switching circuit 70 and the on switch switching circuit 72 are provided has been described. However, only the off switch switching circuit 70 illustrated in FIG. 3 or only the on switch switching circuit 72 illustrated in FIG. The structure provided may be sufficient.
  • the charging / discharging system 10 provided with only the off switch switching circuit 70 is preferably used when the charging current is small.
  • the charge / discharge system 10 provided with only the on-switch switching circuit 72 is preferably used when the discharge current is small.
  • the configuration has been described in which the abnormality signal 94 when abnormality occurs in the power storage unit 40 is transmitted to the light emitting unit 66 side of the switch circuit control unit 60, but the configuration is transmitted to the light receiving unit 68 side. It may be. In this case, it is desirable to prevent an overcurrent from flowing between the reference voltage terminal 62, the plus voltage terminal 64 and the control terminal of the switch circuit 28. In addition, it is desirable to design appropriately so as not to affect the application of the first signal and the second signal to the control terminal of the switch circuit 28.
  • the switch circuit control unit and the charge / discharge system according to the present invention can be used in a charge / discharge system in which a switch circuit is provided between the power input / output line and the power storage unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

L'invention concerne une unité de commande de circuit de commutation (60) qui commande un circuit de commutation (28), lequel commute une connexion entre une ligne d'entrée/sortie d'alimentation électrique (30) et une unité de stockage d'énergie électrique (40), sur la base d'un signal de commande (92) venant d'une unité de commande de système (50). L'unité de commande de circuit de commutation (60) comporte : une unité électroluminescente (66) qui reçoit le signal de commande (92) et émet ou non de la lumière ; une unité de réception de lumière (68) qui produit un signal Marche et un signal Arrêt en réponse à la lumière de l'unité électroluminescente (66) ; un circuit de commutation Marche (72) qui commute le circuit de commutation (28) à la position Marche quand un signal Marche a été entré à partir de l'unité de réception de lumière (68) ; un circuit de commutation Arrêt (70) qui commute le circuit de commutation (28) à la position Arrêt quand un signal Arrêt a été entré à partir de l'unité de réception de lumière (68).
PCT/JP2012/057516 2011-03-31 2012-03-23 Unité de commande de circuit de commutation, et système de chargement et de déchargement WO2012133186A1 (fr)

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JP2011-080779 2011-03-31
JP2011080779 2011-03-31

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103618532A (zh) * 2013-12-09 2014-03-05 黄倜 一种光控开关
CN109194308A (zh) * 2018-11-09 2019-01-11 深圳市金科泰通信设备有限公司 多频率自动切换的晶振电路
KR102532850B1 (ko) * 2023-01-06 2023-05-15 윤혜련 납산배터리용 충, 방전시스템

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0263317A (ja) * 1988-08-30 1990-03-02 Meidensha Corp 電界効果トランジスタのゲート駆動回路
JPH03129920A (ja) * 1989-10-14 1991-06-03 Fuji Electric Co Ltd 光駆動半導体装置
JP2002100970A (ja) * 2000-09-26 2002-04-05 Fujitsu Denso Ltd スイッチ回路
WO2008149551A1 (fr) * 2007-06-07 2008-12-11 Zephyr Corporation Dispositif de prévention contre les décharges excessives et dispositif de stockage électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0263317A (ja) * 1988-08-30 1990-03-02 Meidensha Corp 電界効果トランジスタのゲート駆動回路
JPH03129920A (ja) * 1989-10-14 1991-06-03 Fuji Electric Co Ltd 光駆動半導体装置
JP2002100970A (ja) * 2000-09-26 2002-04-05 Fujitsu Denso Ltd スイッチ回路
WO2008149551A1 (fr) * 2007-06-07 2008-12-11 Zephyr Corporation Dispositif de prévention contre les décharges excessives et dispositif de stockage électrique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103618532A (zh) * 2013-12-09 2014-03-05 黄倜 一种光控开关
CN109194308A (zh) * 2018-11-09 2019-01-11 深圳市金科泰通信设备有限公司 多频率自动切换的晶振电路
CN109194308B (zh) * 2018-11-09 2024-09-20 深圳市金科泰通信设备有限公司 多频率自动切换的晶振电路
KR102532850B1 (ko) * 2023-01-06 2023-05-15 윤혜련 납산배터리용 충, 방전시스템

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