WO2013140573A1 - 蓄電装置 - Google Patents
蓄電装置 Download PDFInfo
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- WO2013140573A1 WO2013140573A1 PCT/JP2012/057336 JP2012057336W WO2013140573A1 WO 2013140573 A1 WO2013140573 A1 WO 2013140573A1 JP 2012057336 W JP2012057336 W JP 2012057336W WO 2013140573 A1 WO2013140573 A1 WO 2013140573A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Definitions
- the present invention relates to a power storage device.
- Patent Document 1 describes a non-contact power supply facility for supplying power to a transport vehicle in a non-contact manner. Specifically, in the non-contact power supply facility, power is supplied from the power supply line to the pickup coil of the power receiving circuit of the transport vehicle by electromagnetic induction. When the power received by the power receiving circuit is rectified and smoothed by the smoothing / rectifying circuit and supplied to the load in the transport vehicle, the surplus power is charged to the charging circuit when the power consumption of the load is small relative to the power feeding capacity of the power receiving circuit. It is described that the capacitor is charged via the capacitor and the load is discharged from the capacitor to the load via the boost converter when the power consumption of the load exceeds the power supply capability of the power receiving circuit. Thus, according to Patent Document 1, it is said that the power receiving capacity can be lowered by leveling the load within the capacity of the non-contact power supply facility, and the power receiving coil can be reduced in size.
- Patent Document 1 The technique described in Patent Document 1 is based on the premise that the charge / discharge circuit is branched and connected to the path connecting the power receiving / smoothing / rectifying circuit (power supply device) and the load (load device). Therefore, there is no description regarding the power storage device that is inserted and connected as a unit between the power supply device and the load device.
- the wiring distance between the devices may be long and complicated depending on the positional relationship of the installation positions between the devices.
- the power supply device, the power storage device, and the load device are configured as independent units, and connection terminals are provided at both ends of the power storage device, the positional relationship of the installation positions of these units is planned when the power storage device is designed. If it is reversed, the wiring is routed and connected to the connection terminal on the opposite side to the installation position of each unit in the power storage device, which may increase the wiring distance between the units.
- the wiring distance is increased, the impedance of the DC bus is increased, and undesirable phenomena such as a jumping phenomenon of the bus voltage occur. Further, when each unit is connected to the connection terminal on the opposite side, the wiring becomes complicated, and the possibility of incorrect wiring may increase.
- the present invention has been made in view of the above, and a power storage device suitable for shortening a wiring distance between devices when the power storage device is connected in a unit between a power supply device and a load device The purpose is to obtain.
- a power storage device is a power storage device connected between a power supply device that supplies DC power and a load device, A first connection terminal to which one of the power supply device and the load device is connected, a second connection terminal to which the other of the power supply device and the load device is connected, the first connection terminal, and the second connection terminal Operation of the bus connected to the connection terminal, the power storage unit charged with power supplied via the bus, the charge / discharge unit connected between the bus and the power storage unit, and the operation of the charge / discharge unit A control unit that controls the first connection terminal, a first current flowing from the first connection terminal to the bus, a second current flowing from the second connection terminal to the bus, and the charge / discharge unit from the bus Detect at least two of the third currents flowing into the A current detection unit; and a connection direction determination unit that determines which of the power supply device and the load device is connected to the first connection terminal, wherein the charge / discharge unit includes the first
- a discharge operation for discharging to the two connection terminals and the control unit performs the charge operation and the discharge operation based on the determination result of the connection direction determination unit and the detection result of the current detection unit.
- the charging / discharging unit is controlled to switch between the two.
- the power supply device and the load device can be connected to either the first connection terminal or the second connection terminal. It is possible to operate correctly. For this reason, even if a power supply device and a load device are installed on either side of the power storage device, each device can be connected with a short distance wiring. That is, when the power storage device is connected in a unit between the power supply device and the load device, a power storage device suitable for shortening the wiring distance between the devices can be provided.
- FIG. 1 is a diagram illustrating a configuration of the power storage device according to the first embodiment.
- FIG. 2 is a circuit diagram illustrating a configuration example of the power supply device according to the first embodiment.
- FIG. 3 is a circuit diagram illustrating a configuration example of the load device according to the first embodiment.
- FIG. 4 is a flowchart showing a procedure for determining the connection direction in the first embodiment.
- FIG. 5 is a diagram showing a flow of current at the time of preliminary charging in the first embodiment.
- FIG. 6 is a diagram showing a flow of current during the preliminary charging in the first embodiment.
- FIG. 7 is a circuit diagram illustrating a configuration example of the charge / discharge circuit according to the first embodiment.
- FIG. 8 is a diagram of a configuration of the power storage device according to the second embodiment.
- FIG. 9 is a diagram illustrating a configuration of a power storage device according to a modification of the second embodiment.
- FIG. 10 is a diagram illustrating a configuration of the power storage device according to the basic mode.
- FIG. 11 is a diagram illustrating a connection state of another device to the power storage device according to the basic mode.
- FIG. 12 is a diagram illustrating a connection state of another device to the power storage device according to the basic mode.
- FIG. 10 is a diagram illustrating a configuration of the power storage device 1 according to the basic mode.
- the power storage device 1 is connected between the power supply device 2 and the load device 3. That is, the power supply device 2, the power storage device 1, and the load device 3 are configured as units independent from each other, and are serially connected in this order. That is, in the system 4 having the power supply device 2, the power storage device 1, and the load device 3, the power storage device 1 is inserted and connected as a unit between the power supply device 2 and the load device 3.
- the power supply device 2 supplies DC power to the power storage device 1.
- the power supply device 2 includes, for example, a three-phase AC power supply 31 (see FIG. 2) and an AC-DC converter.
- the AC-DC converter includes, for example, a rectifier circuit 32 using a diode bridge and a smoothing capacitor as shown in FIG. 33.
- the power supply device 2 generates AC power with the three-phase AC power source 31, converts AC power into DC power using an AC-DC converter, and supplies the converted DC power to the power storage device 1.
- the load device 3 receives DC power via the power storage device 1 and becomes a load for the DC power.
- the load device 3 is driven by DC power supplied from the power supply device 2 via the power storage device 1.
- the load device 3 includes a motor 34 (for example, three-phase alternating current) and an inverter circuit 35 that drives the motor 34, and receives DC power from the power storage device 1.
- the motor 34 is driven by converting the direct-current power into the alternating-current power using 35 and supplying the converted alternating-current power to the motor 34.
- the power storage device 1 supplies the DC power supplied from the power supply device 2 to the load device 3. At this time, the power storage device 1 accumulates the surplus power when surplus occurs in the DC power supplied to the load device 3. For example, when regenerative energy of the motor is generated in the load device 3 that drives the motor, the power storage device 100 receives and stores the regenerative energy. Further, the power storage device 100 supplies the accumulated power to the load device 3 when a shortage occurs in the DC power supplied to the load device 3.
- the power storage device 1 includes a power connection terminal 11, a load connection terminal 12, buses L1p and L1n, connection lines CL1p and CL1n, a current detection unit 15, connection lines CL11p and CL11n, a power storage unit 13, and a charge / discharge unit 14. And a control unit 16.
- the power connection terminal 11 is a terminal designed to be connected to the power supply device 2.
- the load connection terminal 12 is a terminal designed to be connected to the load device 3.
- the power supply connection terminal 11 has a P-side terminal 11p and an N-side terminal 11n, and each of the P-side terminal 11p and the N-side terminal 11n has, for example, a shape and specification customized so that the power supply device 2 is connected.
- the load connection terminal 12 has a P-side terminal 12p and an N-side terminal 12n, and each of the P-side terminal 12p and the N-side terminal 12n has, for example, a shape and specification customized so that the load device 3 is connected. Have.
- the bus lines L1p and L1n connect the power connection terminal 11 and the load connection terminal 12. That is, the P-side bus L1p connects the P-side terminal 11p and the P-side terminal 12p. N-side bus L1n connects N-side terminal 11n and N-side terminal 12n.
- the bus lines L1p and L1n are connected to the connection lines CL1p and CL1n by connection nodes CN1p and CN1n. That is, the P-side bus L1p is connected to the P-side connection line CL1p at the P-side connection node CN1p.
- N-side bus L1n is connected to P-side connection line CL1n at N-side connection node CN1n.
- connection lines CL1p and CL1n have one end connected to the connection nodes CN1p and CN1n and the other end connected to the charge / discharge unit 14. That is, the P-side connection line CL1p has one end connected to the P-side connection node CN1p and the other end connected to the charge / discharge unit 14.
- the N-side connection line CL1n has one end connected to the N-side connection node CN1n and the other end connected to the charge / discharge unit 14.
- the current detector 15 detects the value of the current flowing into the load device 3.
- the current detector 15 includes, for example, a current detector 15a (for example, a current transformer), and the current detector 15a is provided, for example, between the P-side connection node CN1p and the P-side terminal 12p in the P-side bus L1p. .
- the current detector 15a is provided, for example, so that the direction from the P-side connection node CN1p to the P-side terminal 12p becomes a positive value. That is, the current detector 15a not only detects the magnitude of the current, but also detects the direction of the current.
- the current detection unit 15 supplies the detection result to the control unit 16.
- connection lines CL11p and CL11n have one end connected to the charge / discharge unit 14 and the other end connected to the power storage unit 13.
- the power storage unit 13 is charged with the power supplied via the buses L1p and L1n, the connection lines CL1p and CL1n, the charge / discharge unit 14, and the connection lines CL11p and CL11n, and accumulates the charged power. Further, the electric power stored in the power storage unit 13 is discharged by the charge / discharge unit 14.
- the power storage unit 13 includes, for example, a capacitor 13a (see FIG. 7).
- the charging / discharging unit 14 is connected between the buses L1p and L1n and the power storage unit 13. That is, the charging / discharging unit 14 is connected to the buses L1p and L1n via the connection lines CL1p and CL1n, and is connected to the power storage unit 13 via the connection lines CL11p and CL11n.
- the charging / discharging unit 14 performs a charging operation and a discharging operation exclusively under the control of the control unit 16.
- the charging operation is an operation for charging the power storage unit 13 with the power supplied from the power supply connection terminal 11 via the buses L1p and L1n.
- the discharging operation is an operation of discharging the electric power charged in the power storage unit 13 to the load connection terminal 12 via the bus lines L1p and L1n.
- the charging / discharging unit 14 includes, for example, a step-up / down chopper, and the step-up / step-down chopper includes, for example, two switching elements 41 and 42 connected in series and a diode connected in reverse parallel to them as shown in FIG. 43 and 44 and an inductance 45.
- the control unit 16 controls the charging / discharging unit 14 to switch between the charging operation and the discharging operation.
- the control unit 16 turns the switching element 41 on and off while maintaining the switching element 42 in the off state, thereby causing the charging / discharging unit 14 to operate as a step-down chopper and causing the power storage unit 13 to perform charging operation. . That is, the control unit 16 turns on the switching element 41 while maintaining the switching element 42 in an off state so that a current flows from the connection line CL1p to the inductance 45, and stores energy corresponding to the current in the inductance 45. The control unit 16 turns off the switching element 41 while maintaining the switching element 42 in an off state, thereby generating an electromotive force so that the inductance 45 keeps the current, and flowing an induced current from the inductance 45 toward the capacitor 13a. The energy stored in the inductance 45 is charged in the capacitor 13a.
- the control unit 16 operates the charging / discharging unit 14 as a step-up chopper by discharging the power charged in the power storage unit 13 by turning on / off the switching element 42 while maintaining the switching element 41 in the off state.
- the control unit 16 turns on the switching element 42 while keeping the switching element 41 in the OFF state so that a current flows from the capacitor 13 a to the inductance 45, and stores energy corresponding to the current in the inductance 45.
- the control unit 16 turns off the switching element 42 while keeping the switching element 41 in the OFF state, thereby generating an electromotive force so that the inductance 45 maintains the current, and causes an induced current to flow from the inductance 45 toward the connection line CL1p.
- the energy stored in the inductance 45 is discharged to the connection line CL1p.
- control unit 16 performs such control, that is, controls the charging / discharging unit 14 to switch between the charging operation and the discharging operation based on the detection result by the current detecting unit 15.
- the control unit 16 detects the detection result of the current detection unit 15, that is, the detection value of the current flowing into the load device 3 (load current IL) is smaller than the threshold value Ith corresponding to the power supply capacity of the power supply device 2, that is, The charging / discharging unit 14 is controlled so that a part of the electric energy supplied from the power supply device 2 is charged in the power storage unit 13 in a load state where the power supply capacity has a margin. Conversely, for example, the control unit 16 charges the power storage unit 13 when the detected value of the current flowing into the load device 3 (load current IL) becomes larger than the threshold value Ith and the power supply capacity of the power supply device 2 is insufficient.
- the charging / discharging unit 14 is controlled so as to discharge the electric energy, and the capacity shortage of the power supply device 2 is compensated. This makes it possible to compensate for the shortage of power supply capacity by discharging the charged power when there is a sufficient power supply capacity at high load. For this reason, the load fluctuation seen from the power source can be leveled, and the power source capacity can be reduced.
- the load device 3 when the load device 3 is performing a regenerative operation, it detects that the regenerative operation is being performed based on the direction of the load current IL detected by the current detection unit 15 and charges the power storage unit 13 with regenerative power. Thus, the charge / discharge unit 14 is controlled. By supplying the stored regenerative power to the load device 3 during power running, the regenerative power can be used effectively, and the amount of power supplied from the power supply device 2 can be reduced. As described above, by detecting the fluctuating load state based on the magnitude of the load current IL and controlling the charging / discharging of the power storage unit 13 according to the load state, the power source capacity can be reduced and the regenerative power can be effectively used.
- FIG. 11 is a diagram illustrating an example of an arrangement relationship when such a power supply device 2, a power storage device 1, and a load device 3 are configured as independent units and are arranged side by side.
- a power connection terminal 11 for connecting the power supply device 2 is arranged on the power supply device 2 side
- a load connection terminal for connecting the load device 3. 12 is arranged on the load device 3 side. That is, the power supply device 2 is located on the power connection terminal 11 side (left side in FIG. 11) of the power storage device 1 and the load device 3 is located on the load connection terminal 12 side (right side in FIG. 11) of the power storage device 1.
- wirings L2p and L2n for connecting power supply device 2 to power storage device 1 can be shortened, and wirings L3p and L3n for connecting load device 3 to power storage device 1 can be shortened.
- FIG. 12 shows an example of the arrangement relationship when the installation positions of the power supply device 2 and the load device 3 in FIG. 11 are switched.
- the power connection terminal 11 for connecting the power supply device 2 is arranged on the load device 3 side
- the load connection terminal for connecting the load device 3 12 is arranged on the power supply device 2 side. That is, the power supply device 2 is positioned on the opposite side (right side in FIG. 11) of the power supply device 1 in the power storage device 1, and the load device 3 is on the opposite side of the load connection terminal 12 in the power storage device 1 (left side in FIG. 11). Is located. For this reason, as shown in FIG.
- the wirings L2p ′ and L2n ′ for connecting the power supply device 2 to the power storage device 1 become long, and the wirings L3p ′ and L3n ′ for connecting the load device 3 to the power storage device 1 Tend to be longer.
- the power supply device 2, the power storage device 1, and the load device 3 are configured as independent units, and the connection terminals 11 and 12 are provided at both ends of the power storage device 1, the positional relationship between the installation positions of these units is the power storage device 1.
- the wirings L2p ′, L2n ′, L3p ′, and L3n ′ are routed and connected to the connection terminals on the opposite side to the installation positions of the units in the power storage device 1,
- the wiring distance between each unit may become long.
- the impedance of the DC bus is increased, and undesirable phenomena such as a jumping phenomenon of the bus voltage occur.
- wirings L2p ′ and L2n ′ for connecting the power supply device 2 to the power storage device 1 and wirings L3p ′ and L3n ′ for connecting the load device 3 to the power storage device 1 are mutually connected. It becomes complicated and complicated. That is, since each unit is connected to the connection terminal on the opposite side, the wiring becomes complicated and the possibility of erroneous wiring increases.
- the installation positions of the power supply device 2, the power storage device 1, and the load device 3 are the positions shown in FIG. 12, the power supply device 2 is connected to the load connection terminal 12, and the load device 3 is connected to the power supply connection terminal 11. If this is the case, there is a possibility that the system 4 cannot be operated normally, for example, the charge / discharge control of the power storage device 1 is reversed because the detection value by the current detection unit 15 cannot be recognized correctly.
- connection terminals 111 and 112 at both ends of the power storage device 100 can be connected to either the power supply device 2 or the load device 3, and the connection terminals 111 and 112 are connected.
- the connection direction of the power supply device 2 and the load device 3 is determined, and charge / discharge control of the power storage device 1 is performed according to the determination result.
- the power storage device 100 according to the first embodiment will be described focusing on differences from the power storage device according to the basic mode.
- the power storage device 100 includes a first connection terminal 111 and a second connection terminal 112 instead of the power supply connection terminal 11 and the load connection terminal 12 (see FIG. 10).
- FIG. 1 exemplarily shows a case where the power supply device 2 is connected to the first connection terminal 111 and the load device 3 is connected to the second connection terminal 112.
- the first connection terminal 111 includes a P-side terminal 111p and an N-side terminal 111n, and each of the P-side terminal 111p and the N-side terminal 111n is connected to, for example, both the power supply device 2 and the load device 3.
- the second connection terminal 112 has a P-side terminal 112p and an N-side terminal 112n, and each of the P-side terminal 112p and the N-side terminal 112n is connected to, for example, both the power supply device 2 and the load device 3. As such, they have common shapes and specifications.
- the power storage device 100 includes a current detection unit 115 instead of the current detection unit 15 (see FIG. 10).
- the current detection unit 115 detects at least two of the first current I1, the second current I2, and the third current I3.
- the first current I1 is a current that flows from the first connection terminal 111 to the bus L101p.
- the second current I2 is a current that flows from the second connection terminal 112 to the bus L101p.
- the third current I3 is a current that flows into the charging / discharging unit 14 from the bus L101p.
- the current detection unit 115 includes a first current detector 115a, a second current detector 115b, and a third current detector 115c.
- the first current detector 115a is provided between the first connection terminal 111 and the connection node CN101p in the bus L101p.
- the first current detector 115a detects the value of the first current I1 flowing from the first connection terminal 111 into the bus L101p.
- the first current detector 115a is provided such that the direction from the P-side terminal 111p toward the connection node CN101p has a positive value. That is, the first current detector 115a not only detects the magnitude of the current but also detects the direction of the current.
- the first current detector 115 a supplies the detection result to the control unit 116.
- the second current detector 115b is provided between the second connection terminal 112 and the connection node CN101p in the bus L101p.
- the second current detector 115b detects the value of the second current I2 flowing from the second connection terminal 112 into the bus L101p.
- the second current detector 115b is provided such that the direction from the P-side terminal 112p toward the connection node CN101p has a positive value. That is, the second current detector 115b detects not only the magnitude of the current but also the direction of the current.
- the second current detector 115 b supplies the detection result to the control unit 116.
- the third current detector 115c is provided on the connection line CL1p.
- the third current detector 115c detects a third current I3 flowing into the charging / discharging unit 14 from the bus L101p.
- the third current detector 115c is provided such that the direction from the connection node CN101p to the charge / discharge unit 14 is a positive value. That is, the third current detector 115c detects not only the magnitude of the current but also the direction of the current.
- the third current detector 115 c supplies the detection result to the control unit 116.
- the value of the first current I1 detected by the first current detector 115a is Ia
- the value of the second current I2 detected by the second current detector 115b is Ib
- Equation 1 if two of the first current I1, the second current I2, and the third current I3 can be measured, the remaining one can be obtained by Equation 1. That is, although three current detectors are used in the present embodiment, three current detectors are not necessarily required, and the current detector 115 can be configured by any two of the three.
- the power storage device 100 includes a control unit 116 instead of the control unit 16 (see FIG. 10), and further includes a connection direction determination unit 117.
- the control content of the control unit 116 is different from that of the control unit 16. That is, when the system 104 is turned on, if the remaining amount of electrical energy stored in the power storage device 100 is empty, there is a possibility that the power storage device 100 cannot be discharged. Therefore, control unit 116 performs preliminary charging for precharging power storage unit 13 during initialization after power-on.
- the current detection unit 115 detects at least two of the first current I1, the second current I2, and the third current I3 at the time of preliminary charging.
- the connection direction determination unit 117 includes the first connection terminal 111 and the second connection terminal 112 based on at least two of the first current I1, the second current I2, and the third current I3 during the preliminary charging. Which of the currents flows into the buses L101p and L101n.
- the connection direction determination unit 117 connects the power supply device 2 to the terminal of the first connection terminal 111 and the second connection terminal 112 that is determined to have a current flowing into the buses L101p and L101n. It is determined that
- FIG. 4 is a flowchart showing a procedure for determining the connection direction of the power supply device 2 and the load device 3 to the first connection terminal 111 and the second connection terminal 112.
- step S1 when the power storage device 100 is powered on, in step S1, the control unit 116 controls the charging / discharging unit 14 to perform a charging operation and precharges the power storage unit 13.
- step S2 the connection direction determination unit 117 monitors the current values detected by the first current detector 115a and the second current detector 115b. That is, the connection direction determination unit 117 monitors the magnitude and direction of each of the first current I1 and the second current I2.
- step S3 the connection direction determination unit 117 determines whether or not a charging current (first current I1) for preliminary charging is detected by the first current detector 115a.
- the connection direction determination unit 117 advances the process to step S4, and the charging current is not detected by the first current detector 115a. If not (No in step S3), the process proceeds to step S5.
- step S4 the connection direction determination unit 117 determines that the power supply device 2 is connected to the first connection terminal 111 because the charging current is detected by the first current detector 115a (see FIG. 5). .
- the connection direction determination unit 117 supplies the determination result to the control unit 116. Thereby, the control unit 116 can recognize that the power supply device 2 is connected to the first connection terminal 111 and the load device 3 is connected to the second connection terminal 112.
- step S5 since the charging current is not detected by the first current detector 115a, that is, the charging current is detected by the second current detector 115b, the connection direction determination unit 117 performs the second connection. It is determined that the power supply device 2 is connected to the terminal 112 (see FIG. 6). The connection direction determination unit 117 supplies the determination result to the control unit 116. Accordingly, the control unit 116 can recognize that the power supply device 2 is connected to the second connection terminal 112 and the load device 3 is connected to the first connection terminal 111.
- the charging current from the power supply device 2 is as shown by a white arrow. Then, it flows into the power storage device 100 from the first connection terminal 111 and flows to the charging / discharging unit 14 through the first current detector 115a and the third current detector 115c.
- the charging current from the power supply device 2 is indicated by a white arrow.
- the electric current flows into the power storage device 100 from the second connection terminal 112 and flows to the charging / discharging unit 14 through the second current detector 115b and the third current detector 115c.
- connection direction determination unit 117 determines which of the first connection terminal 111 and the second connection terminal 112 is connected to the power supply device 2, the determination result and the current detection unit 115 Based on the detected current value, the control unit 116 controls the charge / discharge unit.
- the control unit 116 when the power supply device 2 is connected to the first connection terminal 111 and the load device 3 is connected to the second connection terminal 112, the control unit 116 includes the second current detector 115 b.
- the charging / discharging unit 14 is controlled as follows, assuming that the current detected at 1 is the load current IL. That is, the control unit 116 controls the charging / discharging unit 14 to perform charging operation when the load current IL detected by the second current detector 115b is smaller than the threshold value Ith corresponding to the power supply capacity of the power supply device 2. Then, a part of the electric energy supplied from the power supply device 2 is charged in the power storage unit 13.
- control unit 116 determines whether or not the load device 3 is operating in the regeneration mode from the direction of the load current IL detected by the second current detector 115b, and when operating in the regeneration mode, The charging / discharging unit 14 is charged, and the regenerative current supplied from the load device 3 is charged to the power storage unit 13.
- the control unit 116 controls the charging / discharging unit 14 to perform a discharging operation. Then, the power supply device 2 is operated so as to compensate for the shortage of the power supply capacity of the power supply device 2 with the discharge current of the power storage unit 13.
- the control unit 116 when the power supply device 2 is connected to the second connection terminal 112 and the load device 3 is connected to the first connection terminal 111, the control unit 116 includes the first current detector 115 a.
- the charging / discharging unit 14 is controlled as follows, assuming that the current detected at 1 is the load current IL. That is, the control unit 116 controls the charging / discharging unit 14 to perform a charging operation when the load current IL detected by the first current detector 115a is smaller than the threshold value Ith corresponding to the power supply capacity of the power supply device 2. Then, a part of the electric energy supplied from the power supply device 2 is charged in the power storage unit 13.
- control unit 116 determines whether or not the load device 3 is operating in the regeneration mode from the direction of the load current IL detected by the first current detector 115a, and when operating in the regeneration mode, The charging / discharging unit 14 is charged, and the regenerative current supplied from the load device 3 is charged to the power storage unit 13.
- the control unit 116 controls the charging / discharging unit 14 to perform a discharging operation. Then, the power supply device 2 is operated so as to compensate for the shortage of the power supply capacity of the power supply device 2 with the discharge current of the power storage unit 13.
- first connection terminal 111 is configured such that one of power supply device 2 and load device 3 is connected, and second connection terminal 112 is a power supply device. 2 and the other of the load device 3 are connected. Then, the connection direction determination unit 117 determines which of the power supply device 2 and the load device 3 is connected to the first connection terminal 111.
- the control unit 116 controls the charging / discharging unit 14 to switch between the charging operation and the discharging operation based on the determination result by the connection direction determination unit 117 and the detection result by the current detection unit 115.
- the operation can be switched according to the connection direction of the power supply device 2 and the load device 3, so the power supply device 2 and the load device 3 are connected to either the first connection terminal 111 or the second connection terminal 112.
- the power storage device 100 is connected in a unit between the power supply device 2 and the load device 3, the power storage device 100 suitable for shortening the wiring distance between the devices can be provided.
- the power supply device 2 and the load device 3 can be operated correctly regardless of which of the first connection terminal 111 and the second connection terminal 112 is connected.
- Complex wiring such as connection to the connection terminal on the opposite side is unnecessary, and the possibility of incorrect wiring can be reduced.
- the first connection terminal 111 is configured such that one of the power supply device 2 and the load device 3 is connected, and the second connection terminal 112 is configured with the power supply device 2 and the load.
- the other of the devices 3 is configured to be connected.
- the first connection terminal 111 includes a P-side terminal 111p and an N-side terminal 111n, and each of the P-side terminal 111p and the N-side terminal 111n is connected to, for example, both the power supply device 2 and the load device 3. Have a common shape and specifications.
- the second connection terminal 112 has a P-side terminal 112p and an N-side terminal 112n, and each of the P-side terminal 112p and the N-side terminal 112n is connected to, for example, both the power supply device 2 and the load device 3. As such, they have common shapes and specifications.
- the current detection unit 115 includes the first current I1 flowing from the first connection terminal 111 to the bus L101p, and the second current I2 flowing from the second connection terminal 112 to the bus L101p. And at least two of the third currents I3 flowing into the charging / discharging unit 14 from the bus L101p.
- the load current flowing into the load device 3 can be detected and supplied to the control unit 116 regardless of whether the power supply device 2 and the load device 3 are connected to the first connection terminal 111 or the second connection terminal 112.
- switching control between the charging operation and the discharging operation by the control unit 116 can be appropriately performed.
- the current detection unit 115 includes the first current detector 115a provided between the first connection terminal 111 and the connection node CN101p in the bus L101p, and the second connection in the bus L101p. At least two current detectors are included among the second current detector 115b provided between the terminal 112 and the connection node CN101p and the third current detector 115c provided on the connection line CL1p.
- the first current I1 flowing from the first connection terminal 111 to the bus L101p, the second current I2 flowing from the second connection terminal 112 to the bus L101p, and the charge from the bus L101p to the charge / discharge unit 14 At least two of the third currents I3 can be detected.
- the control unit 116 performs preliminary charging for preliminary charging of the power storage unit 13 at initialization after power-on.
- the current detection unit 115 detects at least two of the first current I1, the second current I2, and the third current I3 during the preliminary charging.
- the connection direction determination unit 117 includes the first connection terminal 111 and the second connection terminal 112 based on at least two of the first current I1, the second current I2, and the third current I3 during the preliminary charging. From which of the first connection terminal 111 and the second connection terminal 112 it is determined that the current is flowing into the bus L101p. 2 is determined to be connected. Thereby, the connection direction of the power supply device 2 and the load device 3 to the first connection terminal 111 and the second connection terminal 112 can be automatically determined.
- the operation of the system 4 can be started without setting the connection configuration of each device.
- User setting items can be reduced and user convenience can be improved.
- the operational safety of the system 4 can be improved.
- the power storage device 100 since the power storage device 100 is preliminarily charged immediately after the system 4 is turned on, the power storage device 100 can discharge the load device 3 from the first operation start of the load device 3, for example. And the convenience of operation of the system 4 can be improved.
- FIG. 1 A power storage device 100i according to the second embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- FIG. 1 A power storage device 100i according to the second embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- FIG. 1 A power storage device 100i according to the second embodiment will be described. Below, it demonstrates focusing on a different part from Embodiment 1.
- preliminary charging is performed when the power is turned on, and the connection direction determination unit 117 determines the connection direction based on the preliminary charging current detected by the current detection unit 115.
- the connection direction is determined.
- a parameter value for setting the direction is stored in advance, and the connection direction is determined by reading the parameter value.
- the power storage device 100i further includes an operation unit 118i and a storage unit 119i.
- the operation unit 118i receives an input of a parameter value for setting the connection direction from a user or an operator who has visually observed the connection direction of the power supply device 2 and the load device 3 to the first connection terminal 111 and the second connection terminal 112. .
- the operation unit 118i receives an input of a first parameter value from a user or an operator who visually recognizes that the power supply device 2 is connected to the first connection terminal 111.
- the operation unit 118i receives an input of the second parameter value from a user or an operator who has visually confirmed that the power supply device 2 is connected to the second connection terminal 112.
- the operation unit 118i stores the received parameter value in the storage unit 119i.
- the connection direction determination unit 117 refers to the storage unit 119i and acquires a parameter value.
- the connection direction determination unit 117 determines which of the power supply device 2 and the load device 3 is connected to the first connection terminal 111 based on the parameter value.
- the connection direction determination unit 117 determines that the power supply device 2 is connected to the first connection terminal 111 when the acquired is the first parameter value, and the acquired is the second parameter value. In this case, it is determined that the load device 3 is connected to the first connection terminal 111.
- connection direction can be determined at a timing intended by the user or the operator, such as a timing other than the initialization after the power is turned on.
- the power storage device 100j may include a switch 119j instead of the storage unit 119i as illustrated in FIG.
- the operation unit 118j (for example, a button or a knob) is operated to the first position by, for example, a user or an operator who has visually confirmed that the power supply device 2 is connected to the first connection terminal 111.
- the operation unit 118j is operated to the second position by a user or an operator who has visually confirmed that the power supply device 2 is connected to the second connection terminal 112, for example.
- the switch 119j when the switch 119j recognizes that the operation unit 118j is in the first position, the switch 119j sets, for example, the first state indicating that the power supply device 2 is connected to the first connection terminal 111, and the operation unit 118j If it is recognized that 118j is in the second position, for example, the second state indicating that the power supply device 2 is connected to the second connection terminal 112 is set.
- the connection direction determination unit 117 determines which of the power supply device 2 and the load device 3 is connected to the first connection terminal 111 based on the setting state of the switch 119j.
- connection direction determination unit 117 determines that the power supply device 2 is connected to the first connection terminal 111, and the switch 119j is set to the second state. If it is, the power supply device 2 is determined to be connected to the second connection terminal 112.
- connection direction it is possible to determine the connection direction at a timing intended by the user or the operator, such as a timing other than at the time of initialization after turning on the power.
- the power storage device according to the present invention is useful for supplying power to the load device.
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Abstract
Description
実施の形態1にかかる蓄電装置100について説明する前に、基本の形態にかかる蓄電装置の構成について図10を用いて説明する。図10は、基本の形態にかかる蓄電装置1の構成を示す図である。
Ia+Ib=Ic・・・数式1
実施の形態2にかかる蓄電装置100iについて説明する。以下では、実施の形態1と異なる部分を中心に説明する。
2 電源装置
3 負荷装置
11 電源接続端子
12 負荷接続端子
13 蓄電部
14 充放電部
15 電流検出部
16 制御部
31 3相交流電源
32 整流回路
33 平滑コンデンサ
34 モータ
35 インバータ回路
41 スイッチング素子
42 スイッチング素子
43 ダイオード
44 ダイオード
45 インダクタンス
100 蓄電装置
100i 蓄電装置
111 第1の接続端子
112 第2の接続端子
115 電流検出部
115a 第1の電流検出器
115b 第2の電流検出器
115c 第3の電流検出器
116 制御部
117 接続方向判定部
118i 操作部
118j 操作部
119i 記憶部
119j スイッチ
CN101p 接続ノード
CN101n 接続ノード
L101p 母線
L101n 母線
Claims (5)
- 直流電力を供給する電源装置と負荷装置との間に接続される蓄電装置であって、
前記電源装置及び前記負荷装置の一方が接続される第1の接続端子と、
前記電源装置及び前記負荷装置の他方が接続される第2の接続端子と、
前記第1の接続端子と前記第2の接続端子とを接続する母線と、
前記母線を介して供給された電力が充電される蓄電部と、
前記母線と前記蓄電部との間に接続された充放電部と、
前記充放電部の動作を制御する制御部と、
前記第1の接続端子から前記母線へ流入する第1の電流と、前記第2の接続端子から前記母線へ流入する第2の電流と、前記母線から前記充放電部に流入する第3の電流とのうち、少なくとも2つを検出する電流検出部と、
前記第1の接続端子に前記電源装置及び前記負荷装置のいずれが接続されているかを判定する接続方向判定部と、
を備え、
前記充放電部は、前記第1の接続端子又は前記第2の接続端子から前記母線を介して供給された電力を前記蓄電部に充電する充電動作と、前記蓄電部に充電された電力を前記母線を介して前記第1の接続端子又は前記第2の接続端子に放電する放電動作とを排他的に行い、
前記制御部は、前記接続方向判定部による判定結果と前記電流検出部による検出結果とに基づいて、前記充電動作と前記放電動作とを切り換えるように前記充放電部を制御する
ことを特徴とする蓄電装置。 - 一端が前記母線における接続ノードに接続され、他端が前記充放電部に接続された接続線をさらに備え、
前記電流検出部は、
前記母線における前記第1の接続端子と前記接続ノードとの間に設けられた第1の電流検出器と、
前記母線における前記第2の接続端子と前記接続ノードとの間に設けられた第2の電流検出器と、
前記接続線に設けられた第3の電流検出器と、
のうち少なくとも2つの電流検出器を有する
ことを特徴とする請求項1に記載の蓄電装置。 - 前記制御部は、電源投入後の初期化時に前記蓄電部を予備的に充電する予備充電を行い、
前記電流検出部は、前記予備充電時における前記第1の電流、前記第2の電流、及び前記第3の電流の少なくとも2つを検出し、
前記接続方向判定部は、前記予備充電時における前記第1の電流、前記第2の電流、及び前記第3の電流の少なくとも2つに基づいて、前記第1の接続端子及び前記第2の接続端子のいずれから前記母線へ電流が流入しているかを判定し、前記第1の接続端子及び前記第2の接続端子のうち前記母線へ電流が流入していると判定された方の端子に前記電源装置が接続されていると判定する
ことを特徴とする請求項1に記載の蓄電装置。 - 前記第1の接続端子に接続すべき装置を設定するためのパラメータ値を記憶する記憶部をさらに備え、
前記接続方向判定部は、前記記憶されたパラメータ値に基づいて、前記第1の接続端子に前記電源装置と前記負荷装置とのいずれが接続されているかを判定する
ことを特徴とする請求項1に記載の蓄電装置。 - 前記第1の接続端子に接続すべき装置を設定するためのスイッチをさらに備え、
前記接続方向判定部は、前記スイッチの設定状態に基づいて、前記第1の接続端子に前記電源装置と前記負荷装置とのいずれが接続されているかを判定する
ことを特徴とする請求項1に記載の蓄電装置。
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CN201280071624.1A CN104205561B (zh) | 2012-03-22 | 2012-03-22 | 蓄电装置 |
JP2014505901A JP5730438B2 (ja) | 2012-03-22 | 2012-03-22 | 蓄電装置 |
PCT/JP2012/057336 WO2013140573A1 (ja) | 2012-03-22 | 2012-03-22 | 蓄電装置 |
KR1020147025827A KR101615060B1 (ko) | 2012-03-22 | 2012-03-22 | 축전 장치 |
TW101130216A TWI489727B (zh) | 2012-03-22 | 2012-08-21 | 蓄電裝置 |
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JPH11285109A (ja) * | 1998-03-30 | 1999-10-15 | Sharp Corp | 無人搬送車及びその充電制御方法 |
JP2010088190A (ja) * | 2008-09-30 | 2010-04-15 | Honda Motor Co Ltd | 電動車両用充電制御装置 |
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JP2530098B2 (ja) * | 1993-08-30 | 1996-09-04 | 八重洲無線株式会社 | 携帯用電子機器とその電池パックとその充電器とそのアタッチメント |
JP4089896B2 (ja) * | 2003-10-23 | 2008-05-28 | Necトーキン株式会社 | 二次電池及び充電器 |
CN1261319C (zh) * | 2004-11-11 | 2006-06-28 | 北京电巴科技有限公司 | 一种电动公交系统 |
CN101378207B (zh) * | 2007-08-28 | 2011-04-13 | 佶益投资股份有限公司 | 负载控制模块 |
CN101447677A (zh) * | 2008-09-09 | 2009-06-03 | 厦门科华恒盛股份有限公司 | 电储能、电力调峰运行方法及装置 |
JP5589346B2 (ja) * | 2009-10-27 | 2014-09-17 | 株式会社リコー | 充電回路及びその充電方法 |
CN102549871A (zh) * | 2010-08-23 | 2012-07-04 | 三洋电机株式会社 | 功率管理系统 |
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JPH08140276A (ja) * | 1994-11-11 | 1996-05-31 | Oki Electric Ind Co Ltd | 二次電池パックの入出力端子回路構造及びその充電器の入出力端子構造 |
JPH11285109A (ja) * | 1998-03-30 | 1999-10-15 | Sharp Corp | 無人搬送車及びその充電制御方法 |
JP2010088190A (ja) * | 2008-09-30 | 2010-04-15 | Honda Motor Co Ltd | 電動車両用充電制御装置 |
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TWI489727B (zh) | 2015-06-21 |
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