JP5813272B1 - Load testing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load test apparatus capable of controlling a connection method of a secondary battery used as a resistor. A load test apparatus includes a plurality of resistance units each having a battery group and a charging circuit, and includes a switching unit used for switching a connection method of the battery group. It is a load test device that performs a load test by supplying. The plurality of resistance units are connected in parallel with the test target power supply, the first switching unit is used to switch the resistance unit connected to the test target power source among the plurality of resistance units, and the second switching unit is , Among the battery groups provided in each of the plurality of resistance units, used to switch the battery group connected to the external electrical device, and through the second switching unit, among the plurality of battery groups, It is possible to supply electric power to an electric device in a state where the number of sets of battery groups connected in series can be changed. [Selection] Figure 2

Description

  The present invention relates to a load test device and a power storage device used in an electric load test for a power source such as an AC generator.

  A load testing apparatus using a plurality of secondary batteries as resistors (loads) has been proposed.

JP 2012-255721 A

  However, when power is supplied to an electrical device using a secondary battery, control of a connection method between the secondary batteries is not disclosed.

  Accordingly, an object of the present invention is to provide a load test apparatus capable of controlling a connection method of a secondary battery used as a resistor, or an electric power storage device capable of controlling a connection method of a secondary battery.

  A load test apparatus according to the present invention is provided with a plurality of resistance units each including a battery group including one or more secondary batteries and a charging circuit, and includes a switching unit used for switching a connection method of the battery groups. A load test apparatus for performing a load test by supplying power from a test target power source to the unit, wherein the plurality of resistance units are connected in parallel with the test target power source, and the switching unit includes a first switching unit and a second switching unit. A switching unit, wherein the first switching unit is used to switch a resistance unit connected to the power source to be tested among the plurality of resistance units, and the second switching unit is provided for each of the plurality of resistance units. Among the provided battery groups, it is used to switch the battery group connected to an external electrical device. Is capable of switching between being connected in series and being connected in parallel to an external electric device via the second switching unit, and among the plurality of battery groups via the second switching unit. Thus, it is possible to supply power to the electric device in a state where the number of sets of battery groups connected in series can be changed.

Using the switching unit, it is possible to switch and control the connection method of the battery group used as part of the resistance (load) of the load test.
In addition, since the number of sets of battery groups connected in series is variable, it is possible to adjust the voltage applied to the electrical device according to the application (for all external electrical devices 30). By connecting the battery groups in series or in parallel, the applied voltage can be adjusted widely.)

  Preferably, the second switching unit includes a first switch group including a switch connected to each one terminal of the battery group, and a second switch group including a switch connected to each other terminal of the battery group; And connecting to at least one battery group among the battery groups via at least one switch of the first switch group and at least one switch of the second switch group. Done.

  Since power is supplied to external electrical devices via the switches at both ends of the battery group (switches of the first switch group and the second switch group), an erroneous short circuit occurs due to malfunction of the switch control. There is a merit that makes it easier to prevent.

  More preferably, the operation unit has a mode changeover switch used for switching between a mode for performing a load test of the power source to be tested and a mode for supplying power from the battery group to the electric device, and the control unit Each of the battery groups in the switch of the first switch group in order to release the electrical connection between the plurality of battery groups and the electric device when the mode is set to the load test mode by the mode switch. The operation of the second switching unit is controlled so that the connection with one of the terminals is released and the connection with the other terminal of the battery group is released in the switches of the second switch group.

  At the time of load test (during storage), the switches at both ends of the battery group (switches of the first switch group and the switches of the second switch group) are disconnected from the battery, so even if one of the switches fails The power supply to the external electric device can be cut off reliably.

  More preferably, the first switching unit has a switch group including a switch connected to each one terminal of the battery group and at least one of the other terminals, and is set to a mode in which power is supplied by the mode changeover switch. In order to release the electrical connection between the plurality of battery groups and the power source to be tested, the connection of one terminal of the battery group to at least one of the other terminals is performed in the switch of the switch group. The operation of the first switching unit is controlled so as to be released.

  By disconnecting the battery group and the test target power supply with the switch of the switch group at the time of power supply, even if the test target power supply has not been removed from the load tester, the power to the test target power supply can be ensured. Supply (back flow) can be shut off.

  Preferably, the operation unit used for performing the first selection for selecting the voltage of the battery group used for power supply to the electric device and the operation control of the second switching unit based on the first selection are performed. And a controller for performing the operation.

  The operation unit used to perform the first selection is used to specify the battery voltage of the battery group, and the operation control of the second switching unit is performed in accordance with the specified operation content, so that it is easily desired The voltage can be set.

  More preferably, the control unit controls the operation of the second switching unit by preferentially using a battery group having a large remaining battery capacity among the plurality of battery groups.

  Thereby, it becomes possible to efficiently supply the electric power stored in the battery group to the electric device.

  More preferably, the control unit performs switching control of a battery group used for power supply to the electrical device among the battery groups in accordance with the remaining battery level while the power supply to the electrical device is performed. .

  Preferably, the operation unit includes a mode changeover switch used for switching between a mode for performing a load test of the power source to be tested and a mode for supplying power from the battery group to the electric device, The unit controls the operation of the second switching unit so as to release the electrical connection between the plurality of battery groups and the electric device when the mode is set to the load test mode by the mode changeover switch, The operation of the first switching unit is controlled so as to release the electrical connection between the plurality of battery groups and the test target power source when the mode for supplying power is set by the mode switch.

Thus, the current from the test subject power tolerance test, it is possible to prevent flow directly to DC / AC Lee Nbata and electrical equipment.
In addition, it is possible to prevent a backflow of current from the battery group to the power source to be tested during power supply.

  Preferably, the test target power source is a three-phase AC power source, and any two of the U-phase line, V-phase line, and W-phase line connected to the test target power source are each of the plurality of resistance units. The resistance unit is provided in the number of sets that is a multiple of three. Among the plurality of resistance units, the number of sets connected to the U-phase line and the number of sets connected to the V-phase line among the plurality of resistance units The number of sets is equal to the number of sets of a plurality of resistance units connected to the W-phase line.

  This makes it possible to connect the U-phase wire, the V-phase wire, and the W-phase wire to the resistance unit in a balanced manner.

  Preferably, the operation unit is used for performing a second selection for selecting a battery group that supplies power to an electric device and a third selection for selecting a connection method for the battery group selected in the second selection. And a control unit that controls the operation of the second switching unit based on the second selection and the third selection.

  As a result, the user of the load test apparatus can specify the battery group used for power supply to the external electric device and the connection method thereof by himself / herself.

  The power storage device according to the present invention is provided with a plurality of resistance units each having a battery group including one or more secondary batteries and a charging circuit, and includes a switching unit used for switching a connection method of the battery groups. A power storage device that stores power by supplying power from a power source to a unit, wherein the plurality of resistance units are connected in parallel with the power source, and the switching unit includes a first switching unit and a second switching unit. The first switching unit is used to switch a resistance unit connected to the power source among the plurality of resistance units, and the second switching unit is a battery group provided in each of the plurality of resistance units. And a plurality of resistance units are connected via the second switching unit. In addition, it is possible to switch between external connection to serial connection and parallel connection to an external electrical device, and a battery connected in series among a plurality of battery groups via the second switching unit. Electric power can be supplied to the electrical equipment in a state in which the number of sets in the group can be changed.

  Preferably, the second switching unit includes a first switch group including a switch connected to each one terminal of the battery group, and a second switch group including a switch connected to each other terminal of the battery group; And connecting to at least one battery group among the battery groups via at least one switch of the first switch group and at least one switch of the second switch group. Done.

  More preferably, the operation unit includes a mode switch used for switching between a mode for storing power and a mode for supplying power from the battery group to the electrical device, and the control unit includes a mode switch. In order to release the electrical connection between the plurality of battery groups and the electric device when the battery is set to the power storage mode, the switch of the first switch group is connected to each one terminal of the battery group. The operation of the second switching unit is controlled such that the connection is released and the connection of each of the other terminals of the battery group is released in the switches of the second switch group.

  More preferably, the first switching unit has a switch group including a switch connected to each one terminal of the battery group and at least one of the other terminals, and is set to a mode in which power is supplied by the mode changeover switch. In order to release the electrical connection between the plurality of battery groups and the power source, the connection of one terminal of the battery group and at least one of the other terminals is released in the switch of the switch group. As described above, the operation of the first switching unit is controlled.

  As described above, according to the present invention, it is possible to provide a load test apparatus capable of controlling a connection method of a secondary battery used as a resistor, or a power storage device capable of controlling a connection method of a secondary battery.

It is a schematic diagram which shows the structure of the load test apparatus in this embodiment. It is a schematic diagram which shows the circuit structure in the case of performing the load test of a three-phase alternating current power supply using a 1st resistance unit and a 2nd resistance unit with the load test apparatus in this embodiment. It is a front view of the operation part containing the 2nd operation switch used in order to perform 1st selection. A first battery group to third battery group and the sixth battery group are connected in parallel, it is a schematic diagram showing a circuit configuration for power supply to the electrical device through the DC / AC Lee Nbata. A third battery group and the fourth battery group and the sixth battery group are connected in series, it is a schematic diagram showing a circuit configuration for power supply to the electrical device through the DC / AC Lee Nbata. It is a front view of the operation part containing the 2nd operation switch used in order to perform 2nd selection and 3rd selection. It is a schematic diagram which shows the circuit structure in the case of performing the load test of a single phase alternating current power supply (or direct current power supply) using a 1st resistance unit and a 2nd resistance unit with the load test apparatus in this embodiment. A first battery group to third battery group and the sixth battery group are connected in parallel, it is a schematic diagram showing a circuit configuration for power supply to the electrical device without passing through the DC / AC Lee Nbata.

Hereinafter, the present embodiment will be described with reference to the drawings. Load test apparatus 1 in the present embodiment, the power supply terminal unit 7, the control unit 8, operation unit 9, the first resistor unit 10a~ sixth resistor unit 10f, DC / AC Lee Nbata 20, the switching unit (first switching unit SW1 , A second switching unit SW2).

  The power supply terminal section 7 has a U-phase terminal UT, a V-phase terminal VT, and a W-phase terminal WT. During a load test, the power supply terminal section 7 is a test target through a vacuum circuit breaker (VCB: Vacuum Circuit Breaker, not shown). The R phase terminal, the S phase terminal, and the T phase terminal of the phase AC power supply are connected.

  The U-phase line Lu extending from the U-phase terminal UT, the V-phase line Lv extending from the V-phase terminal VT, and the W-phase line Lw extending from the W-phase terminal WT are connected to the first resistance unit 10a to the first through the first switching unit SW1. Connected to the 6-resistance unit 10f.

  The control unit 8 controls the operation of the switching units (the first switching unit SW1 and the second switching unit SW2) used for switching the battery group connection method based on the operation state of the operation unit 9.

  The operation unit 9 is stored in the first operation switch 9a (first switch S1 to sixth switch S6) for adjusting the load amount of the power source to be tested connected to the load test apparatus 1, and the battery group of the load test apparatus 1. The second operation switch 9b used for making a first selection for selecting a battery voltage when supplying the supplied electric power to the external electric device 30, and for switching the use mode between the load test and the power supply. A mode changeover switch SA is used (see FIG. 3).

Note that the value of the battery voltage referred to here is a voltage value of the battery group to be used to power the electrical device 30, voltage actually applied to the electric device 30, conversion loss in DC / AC Lee Nbata 20 It becomes a value different from the battery voltage value due to the above.

  When the mode changeover switch SA is set to “load test (power storage) (mode for performing a load test of the power supply to be tested)”, based on the operation state of the first operation switch 9a, that is, the first switch S1 to the first switch Based on the operating state of the 6-switch S6, the control unit 8 controls the single-pole single-throw switching unit (the 11th switch S11 to the 16th switch S16) that constitutes the first switching unit SW1.

  FIG. 3 shows a state in which the first switch S1 and the second switch S2 are turned on, and the third switch S3 to the sixth switch S6 are turned off. Based on these operation states, the eleventh switch S11 and the twelfth switch S12 are turned on, and the thirteenth switch S13 to the sixteenth switch S16 are turned off (see FIG. 2).

  The second operation switch 9b is a rotary switch for selecting a battery voltage when supplying the electric power stored in the load test apparatus 1 to the external electric device 30, and as an example in the present embodiment, the first rotation position P1. To sixth rotation position P6.

When the battery voltage is 24V, the rotational position of the second operation switch 9b is adjusted to the first rotational position P1.
When the battery voltage is 48V, the rotational position of the second operation switch 9b is adjusted to the second rotational position P2.
When the battery voltage is 72V, the rotational position of the second operation switch 9b is adjusted to the third rotational position P3.
When the battery voltage is 96V, the rotational position of the second operation switch 9b is adjusted to the fourth rotational position P4 (see FIG. 3).
When the battery voltage is 120V, the rotational position of the second operation switch 9b is adjusted to the fifth rotational position P5.
When the battery voltage is 144 V, the rotational position of the second operation switch 9b is adjusted to the sixth rotational position P6.

  When the mode changeover switch SA is set to “power supply (mode for supplying power from the battery group to the electrical device)”, the control unit 8 determines whether the second operation switch 9b is in operation (rotation position). The single-pole single-throw switching unit (22nd switch S22 to 26th switch S26, 31st switch S31 to 36th switch S36) and the single-pole double-throw switching unit (41st switch S41) constituting the second switching unit SW2. To control the operation of the 46th switch S46).

  Specifically, the operation state of the second operation switch 9b, that is, the voltage corresponding to the voltage value of the selected rotational position becomes the voltage (battery voltage) of the battery group used for power supply to the electric device 30. As described above, the control unit 8 controls the switch of the second switching unit SW2.

  The first resistance unit 10a to the sixth resistance unit 10f are connected in parallel to the test target power supply via the first switching unit SW1 (11th switch S11 to 16th switch S16).

  Specifically, each of the switch groups (the eleventh switch S11 to the sixteenth switch S16) included in the first switching unit SW1 is connected to at least one of the one terminal and the other terminal of the battery group.

  1st switching part SW1 is used in order to switch the resistance unit connected with a test object power supply among the 1st resistance unit 10a-the 6th resistance unit 10f.

  The first resistance unit 10a to the sixth resistance unit 10f include the second switching unit SW2 (22nd switch S22 to 26th switch S26, 31st switch S31 to 36th switch S36, 41st switch S41 to 46th switch S46). The electric device 30 to be supplied with power is connected in series or in parallel.

  The second switching unit SW2 is a battery group connected to the external electrical device 30 among the first battery group BG1 to the sixth battery group BG6 provided in each of the first resistance unit 10a to the sixth resistance unit 10f. Used to switch between.

  The first resistance unit 10a includes a first AC / DC converter 11a, a first charging circuit 13a, and a first battery group BG1.

  The first AC / DC converter 11a is connected to the U-phase line Lu via the eleventh switch S11, connected to the V-phase line Lv, and the type of electricity for the power supplied from the U-phase line Lu and the V-phase line Lv. Is converted from AC to DC.

  The first battery group BG1 includes one or more secondary batteries, and accumulates power supplied from the test target power supply via the first AC / DC converter 11a and the first charging circuit 13a. The resistance of the first AC / DC converter 11a, the first charging circuit 13a, and the first battery group BG1 when storing electricity is used as a load for a load test.

  The second resistance unit 10b includes a second AC / DC converter 11b, a second charging circuit 13b, and a second battery group BG2.

  The second AC / DC converter 11b is connected to the W-phase line Lw via the twelfth switch S12, connected to the U-phase line Lu, and the type of electricity for the power supplied from the W-phase line Lw and the U-phase line Lu. Is converted from AC to DC.

  The second battery group BG2 includes one or more secondary batteries, and accumulates electric power supplied from the test target power supply via the second AC / DC converter 11b and the second charging circuit 13b. The resistances of the second AC / DC converter 11b, the second charging circuit 13b, and the second battery group BG2 during power storage are used as a load for the load test.

  The third resistance unit 10c includes a third AC / DC converter 11c, a third charging circuit 13c, and a third battery group BG3.

  The third AC / DC converter 11c is connected to the V-phase line Lv via the thirteenth switch S13, is connected to the W-phase line Lw, and the type of electricity is the electric power supplied from the V-phase line Lv and the W-phase line Lw. Is converted from AC to DC.

  The third battery group BG3 has one or more secondary batteries, and accumulates power supplied from the test target power supply via the third AC / DC converter 11c and the third charging circuit 13c. The resistance of the third AC / DC converter 11c, the third charging circuit 13c, and the third battery group BG3 when storing electricity is used as a load for a load test.

  The fourth resistance unit 10d includes a fourth AC / DC converter 11d, a fourth charging circuit 13d, and a fourth battery group BG4.

  The fourth AC / DC converter 11d is connected to the U-phase line Lu via the fourteenth switch S14, connected to the V-phase line Lv, and the type of electricity for the power supplied from the U-phase line Lu and the V-phase line Lv. Is converted from AC to DC.

  The fourth battery group BG4 includes one or more secondary batteries, and accumulates electric power supplied from the test target power supply via the fourth AC / DC converter 11d and the fourth charging circuit 13d. The resistance of the fourth AC / DC converter 11d, the fourth charging circuit 13d, and the fourth battery group BG4 at the time of storing electricity is used as a load for the load test.

  The fifth resistance unit 10e includes a fifth AC / DC converter 11e, a fifth charging circuit 13e, and a fifth battery group BG5.

  The fifth AC / DC converter 11e is connected to the W-phase line Lw via the fifteenth switch S15, connected to the U-phase line Lu, and the type of electricity for the power supplied from the W-phase line Lw and the U-phase line Lu. Is converted from AC to DC.

  The fifth battery group BG5 includes one or more secondary batteries, and accumulates electric power supplied from the test target power supply via the fifth AC / DC converter 11e and the fifth charging circuit 13e. The resistance of the fifth AC / DC converter 11e, the fifth charging circuit 13e, and the fifth battery group BG5 when storing electricity is used as a load for a load test.

  The sixth resistance unit 10f includes a sixth AC / DC converter 11f, a sixth charging circuit 13f, and a sixth battery group BG6.

  The sixth AC / DC converter 11f is connected to the V-phase line Lv via the sixteenth switch S16, is connected to the W-phase line Lw, and the electric type is supplied from the V-phase line Lv and the W-phase line Lw. Is converted from AC to DC.

  The sixth battery group BG6 includes one or more secondary batteries, and accumulates power supplied from the power source to be tested via the sixth AC / DC converter 11f and the sixth charging circuit 13f. The resistance of the sixth AC / DC converter 11f, the sixth charging circuit 13f, and the sixth battery group BG6 when storing electricity is used as a load for a load test.

  In order to cool the AC / DC converter, the charging circuit, and the battery group of each of the first resistance unit 10a to the sixth resistance unit 10f, it is desirable to provide a cooling fan in the vicinity thereof.

  The charging circuit of each of the first resistance unit 10a to the sixth resistance unit 10f is preferably of a quick charging type so that charging of the secondary battery can be completed within the time of the load test.

  In the present embodiment, each of the first battery group BG1 to the sixth battery group BG6 has two 12V secondary batteries and is connected in series, and each of the first resistance unit 10a to the sixth resistance unit 10f An example in which a battery group, an AC / DC converter, and a charging circuit constitute a resistor group having a rated capacity of 2 kW is shown. However, the number of secondary batteries and the value of the rated capacity are not limited to this.

  For each resistance unit, it is desirable to provide a backflow prevention device (not shown) such as a diode between the charging circuit and the battery group in order to prevent discharge (backflow) from the battery group to the charging circuit.

  In addition, the first switching unit SW1 (the eleventh switch S11 to the sixteenth switch S16) is provided between the U-phase line Lu, the V-phase line Lv, the W-phase line Lw, and the AC / DC converter of the resistance unit. However, a form provided between the charging circuit of the resistance unit and the battery group may be employed. In this case, the first switching unit SW1 also serves as a backflow prevention device.

One terminal (+ terminal) of the first battery group BG1 is connected to one terminal of the first charging circuit 13a and one terminal of the 31st switch S31.
One terminal (+ terminal) of the second battery group BG2 is connected to one terminal of the second charging circuit 13b and one terminal of the thirty-second switch S32.
One terminal (+ terminal) of the third battery group BG3 is connected to one terminal of the third charging circuit 13c and one terminal of the 33rd switch S33.
One terminal (+ terminal) of the fourth battery group BG4 is connected to one terminal of the fourth charging circuit 13d and one terminal of the 34th switch S34.
One terminal (+ terminal) of the fifth battery group BG5 is connected to one terminal of the fifth charging circuit 13e and one terminal of the 35th switch S35.
One terminal (+ terminal) of the sixth battery group BG6 is connected to one terminal of the sixth charging circuit 13f and one terminal of the 36th switch S36.
That is, each one terminal of the battery group is connected to a switch (any one of the 31st switch S31 to the 36th switch S36) constituting the first switch group.

The other terminal (− terminal) of the first battery group BG1 is connected to the other terminal of the first charging circuit 13a and one of the terminals of the 41st switch S41, and the second battery group BG2 is connected via the 22nd switch S22. Connected to the other terminal (-terminal).
The other terminal (− terminal) of the second battery group BG2 is connected to the other terminal of the second charging circuit 13b and one of the terminals of the 42nd switch S42, and the third battery group BG3 is connected via the 23rd switch S23. Connected to the other terminal (-terminal).
The other terminal (-terminal) of the third battery group BG3 is connected to the other terminal of the third charging circuit 13c and one of the terminals of the 43rd switch S43, and the fourth battery group BG4 is connected via the 24th switch S24. Connected to the other terminal (-terminal).
The other terminal (− terminal) of the fourth battery group BG4 is connected to the other terminal of the fourth charging circuit 13d and one of the terminals of the 44th switch S44, and the fifth battery group BG5 is connected via the 25th switch S25. Connected to the other terminal (-terminal).
The other terminal (−terminal) of the fifth battery group BG5 is connected to the other terminal of the fifth charging circuit 13e and one of the terminals of the 45th switch S45, and the sixth battery group BG6 is connected via the 26th switch S26. Connected to the other terminal (-terminal).
The other terminal (-terminal) of the sixth battery group BG6 is connected to the other terminal of the sixth charging circuit 13f and one of the terminals of the 46th switch S46.
That is, each other terminal of the battery group is connected to a switch (any one of the 41st switch S41 to the 46th switch S46) constituting the second switch group.

One terminal of the 41st switch S41 is connected to the other terminal (− terminal) of the first battery group BG1 and one of the terminals of the 22nd switch S22, and the other terminal of the 41st switch S41 is connected to the 31st switch S31. is the connection to the other and DC / AC Lee Nbata 20 of the terminal, the common terminal of the 41 switch S41 is connected to the other of the other and of the 32 switch S32 pin terminal of the 42 switch S42.
One terminal of the 42nd switch S42 is connected to the other terminal (− terminal) of the second battery group BG2, the other terminal of the 22nd switch S22, and one of the terminals of the 23rd switch S23. The common terminal is connected to the other terminal of the 43rd switch S43 and the other terminal of the 33rd switch S33.
One terminal of the 43rd switch S43 is connected to the other terminal (− terminal) of the third battery group BG3, the other terminal of the 23rd switch S23, and one of the terminals of the 24th switch S24. The common terminal is connected to the other terminal of the 44th switch S44 and the other terminal of the 34th switch S34.
One terminal of the 44th switch S44 is connected to the other terminal (− terminal) of the fourth battery group BG4, the other terminal of the 24th switch S24 and one of the terminals of the 25th switch S25. The common terminal is connected to the other terminal of the 45th switch S45 and the other terminal of the 35th switch S35.
One terminal of the 45th switch S45 is connected to the other terminal (− terminal) of the fifth battery group BG5, the other terminal of the 25th switch S25, and one terminal of the 26th switch S26. The common terminal is connected to the other terminal of the 46th switch S46 and the other terminal of the 36th switch S36.
One terminal of the 46 switch S46, the other terminal of the sixth battery group BG6 (- terminal) and 26 is connected to the other terminal of the switch S26, the common terminal of the 46th switch S46 is, DC / AC Lee Nbata 20.

DC / AC Lee Nbata 20, for the power supplied from the first battery group BG1~ sixth battery group BG6, converts electric type to AC from DC, the power of the alternating current to the electrical device 30 such as a later stage of the motor Supply.

  When performing a load test (storage), the control unit 8 controls the operation of the second switching unit SW2 so as to release the electrical connection between the first battery group BG1 to the sixth battery group BG6 and the electrical device 30. Do.

  Specifically, when the mode changeover switch SA is set to “load test (power storage)”, the control unit 8 controls the 22nd switch S22 to the 26th switch S26 and the first switch group of the second switching unit SW2. Switch (31st switch S31 to 36th switch S36) is turned off (see FIG. 2).

For this reason, during the load test, power is not supplied from the first battery group BG1 to the sixth battery group BG6 to the outside (the electrical device 30). Thus, the current from the test subject power tolerance test, it is possible to prevent flow directly DC / AC Lee Nbata 20 and electrical equipment 30.

  When power is supplied to the electrical device 30 using the battery group, the control unit 8 performs the first switching so as to release the electrical connection between the first battery group BG1 to the sixth battery group BG6 and the power source to be tested. The operation of the unit SW1 is controlled.

  Specifically, when the mode changeover switch SA is set to “power supply”, the control unit 8 turns off the switch group (the eleventh switch S11 to the sixteenth switch S16) included in the first switching unit SW1. (See FIGS. 4 and 5).

  For this reason, it is possible to prevent a backflow of current from the first battery group BG1 to the sixth battery group BG6 to the power source to be tested during power supply.

  When the electric power stored in the battery group is supplied to the external electrical device 30, the control unit 8 is configured to use the single-pole single-throw switching unit (the 22nd switch S22 to the 26th switch S26, the second switching unit SW2). The on / off control of the 31st switch S31 to the 36th switch S36) and the operation control of the single pole double throw type switching unit (the 41st switch S41 to the 46th switch S46) are performed to switch the battery group used for power supply, Switch the connection method between battery groups (series and parallel).

For example, the 22nd switch S22 to the 26th switch S26, the 31st switch S31 to the 33rd switch S33, and the 36th switch S36 are turned on, the 34th switch S34 and the 35th switch S35 are turned off, and the 41st switch S41 to S41 When the common terminal of the 45th switch S45 is connected to the other terminal side and the common terminal of the 46th switch S46 is connected to the one terminal side, the first battery group BG1 to the third battery group BG3 and the sixth battery group BG6. in a state connected in parallel, DC / AC via the Lee Nbata 20, the electric device 30 can be powered (see FIG. 4). In this case, the voltage of 24V is applied to the DC / AC Lee Nbata 20.

Also, the 33rd switch S33, the 34th switch S34 and the 36th switch S36 are turned on, the 22nd switch S22 to the 26th switch S26, the 31st switch S31, the 32nd switch S32 and the 35th switch S35 are turned off, The common terminal of the 41st switch S41, the 42nd switch S42 and the 45th switch S45 is connected to the other terminal side, and the common terminal of the 43rd switch S43, the 44th switch S44 and the 46th switch S46 is connected to the one terminal side. If is, while connected to the third battery group BG3 and fourth battery group BG4 the sixth battery group BG6 in series, via a DC / AC Lee Nbata 20, the electric device 30 can be powered ( (See FIG. 5). In this case, the voltage of 72V is applied to the DC / AC Lee Nbata 20.

  Thereby, it becomes possible to switch and control the connection method of the battery group used as a part of the resistance (load) of the load test using the first switching unit SW1 and the second switching unit SW2.

  In addition, since the number of sets of battery groups connected in series becomes variable via the second switching unit SW2, the voltage applied to the electrical device 30 can be adjusted according to the application (external) The applied voltage can be widely adjusted by connecting all the battery groups in series or in parallel to the electrical device 30).

  The second operation switch 9b used for performing the first selection is used to specify the battery voltage of the battery group, and the operation control of the second switching unit SW2 is performed according to the specified operation content. It becomes possible to easily set a desired voltage.

  Also, externally via switches at both ends of the battery group (switches of the first switch group (31st switch S31 to 36th switch S36) and switches of the second switch group (41st switch S41 to 46th switch S46)). Therefore, there is an advantage that it is easy to prevent the occurrence of an erroneous short circuit state due to a malfunction of the switch control.

  Further, during a load test (during storage), switches at both ends of the battery group (switches of the first switch group (31st switch S31 to 36th switch S36) and switches of the second switch group (41st switch S41 to 46th switch). Since the connection with the battery is released by the switch S46)), the power supply to the external electrical device 30 can be reliably cut off even if one of the switches fails.

  In addition, when power is supplied, the test target power source is removed from the load testing machine 1 by releasing the connection between the battery group and the test target power source with the switches of the switch group (the eleventh switch S11 to the sixteenth switch S16). Even if not, the power supply (reverse flow) to the power source to be tested can be cut off reliably.

  When the rotation position of the second operation switch 9b is set to any one of the first rotation position P1 to the fifth rotation position P5, a plurality of combinations of battery groups used for supplying power to the electric device 30 are provided. Conceivable.

  For example, when the voltage of the battery group used for power supply to the electrical device 30 is set to 24V by adjusting the rotation position of the second operation switch 9b to the first rotation position P1, the battery group as shown in FIG. Can be connected in parallel, or any one of the first battery group BG1 to the sixth battery group BG6 can be used.

  Further, when the voltage of the battery group used for supplying power to the electric device 30 is set to 72 V by adjusting the rotation position of the second operation switch 9b to the third rotation position P3, as shown in FIG. A configuration in which any three sets of the battery group BG1 to the sixth battery group BG6 are connected in series is conceivable.

  When a plurality of combinations of battery groups to be used are considered, the control unit 8 may be configured to determine a battery group to be used at random and control the operation of the second switching unit SW2. The battery group to be used may be determined based on the state of charge.

  Specifically, the control unit 8 includes information on the charging voltage and charging current of each battery group from the first charging circuit 13a to the sixth charging circuit 13f (or voltmeters and ammeters provided near the battery group). On the basis of this information, as the operation control of the second switching unit SW2, control for preferentially using a battery group with a large remaining battery capacity is performed.

For example, when three sets of battery groups are connected in series by aligning the rotation position of the second operation switch 9b with the third rotation position P3, the remaining battery power in the first battery group BG1 to the sixth battery group BG6. connect the battery group amount is larger three sets in series, and supplies power to the DC / AC Lee Nbata 20. As a result, the electric power stored in the battery group can be efficiently supplied to the electric device 30.

  When a plurality of combinations of battery groups to be used are considered, the control unit 8 further supplies power to the electrical device 30 according to the remaining battery power while power is being supplied to the electrical device 30. The battery group used for the switching may be controlled to be switched. Specifically, when the remaining battery level of the battery group used to supply power to the electrical device 30 decreases, the remaining battery group (the battery that is higher than the remaining battery level of the battery group currently used for power supply). The control unit 8 controls the operation of the second switching unit SW2 so as to supply electric power to the electric device 30 using a battery group having a remaining amount.

  In the present embodiment, the second operation switch 9b of the operation unit 9 has been described as being used for performing the first selection, but instead of the first selection, the first battery group BG1 to the sixth battery group BG6. Are used to perform a second selection for selecting one to be used for power supply to the electrical device 30 and a third selection for selecting whether the battery group selected in the second selection is connected in series or in parallel. (See FIG. 6).

  In this case, the second operation switch 9b includes a 51st switch S51 to a 57th switch S57.

  The 51st switch S51 to the 56th switch S56 are used for the second selection, and correspond to the first battery group BG1 to the sixth battery group BG6, and turn on / off the battery group to be used. For example, as shown in FIG. 6, when the 51st switch S51 to the 53rd switch S53 and the 56th switch S56 are operated to the ON side in the power supply mode, the first battery group BG1 to the third battery group BG3 Electric power is supplied to the electrical device 30 using the sixth battery group BG6.

  The 57th switch S57 is used for the third selection, and is a switch for selecting whether the battery group to be used is connected in series or in parallel.

  As shown in FIG. 6, in the power supply mode, when parallel is selected in the 57th switch S57, the first battery group BG1 to the third battery group BG3 and the sixth battery group BG6 are connected in parallel, The control unit 8 controls the operation of the second switching unit SW2 so that power is supplied to the device 30. As a result, the user of the load test apparatus 1 can specify the battery group used to supply power to the external electrical device 30 and the connection method thereof by himself / herself.

  Moreover, although this embodiment demonstrated the form of the load test apparatus 1 in case a test object power supply is a three-phase alternating current power supply, a test object power supply is not only a three-phase alternating current power supply but a single phase alternating current power supply or a direct current power supply. It may be present (see FIG. 7).

  In this case, the power terminal portion 7 has a first terminal T1 and a second terminal T2, and a single-phase alternating current to be tested through a vacuum circuit breaker (VCB: Vacuum Circuit Breaker, not shown) during a load test. One terminal of the power supply (or DC power supply) is connected to the first terminal T1, and the other terminal is connected to the second terminal T2.

  The first line L1 extending from the first terminal T1 and the second line L2 extending from the second terminal T2 are connected to the first resistance unit 10a to the sixth resistance unit 10f via the first switching unit SW1. Note that when the test target power source is a DC power source, the first AC / DC converter 11a to the sixth AC / DC converter 11f are unnecessary.

  Moreover, although this embodiment demonstrated the form in which the load test apparatus 1 was provided with 6 sets of resistance units, the number of sets of resistance units is not restricted to this.

  In the present embodiment, since the first battery group BG1 to the sixth battery group BG6 each have two 12V secondary batteries, the first battery group BG1 to the sixth battery group BG6 are connected in series, The voltage (battery voltage) of the battery group used for power supply to the device 30 is 12V × 2 × 6 = 144V. Further, when 15 sets of resistance units including the same battery group are provided in the load test apparatus 1, and these are connected in series, the battery voltage becomes 12V × 2 × 15 = 360V.

  However, when the power source to be tested is a three-phase AC power source, in order to connect the U-phase line Lu, the V-phase line Lv, and the W-phase line Lw to the resistance unit in a balanced manner, the resistance unit is provided in a set number that is a multiple of three. Is desirable.

Further, in this embodiment, for driving the electric device 30 of the AC drive, DC / AC via the Lee Nbata 20, but the battery group and the electric device 30 has been described a form to be connected, the DC driving electric device 30 On the other hand, the form which supplies the electric power accumulate | stored in the battery group may be sufficient. In this case, without passing through the DC / AC Lee Nbata 20, the battery group is connected to the electric device 30 (see FIG. 8).

  The load test apparatus 1 stores (stores) power supplied from the power supply without performing a load test on the connected power supply, and uses the apparatus as a power supply apparatus (power storage apparatus) for supplying power to an external electrical device. It may be a form.

DESCRIPTION OF SYMBOLS 1 Load test apparatus 7 Power supply terminal part 8 Control part 9 Operation part 9a, 9b 1st operation switch, 2nd operation switch 10a-10f 1st resistance unit-6th resistance unit 11a-11f 1st AC / DC converter-6th AC / DC converter 13a~13f first charging circuit to sixth charge circuit 20 DC / AC Lee Nbata <br/> 30 electrical apparatus BG1~BG6 first battery group to sixth battery group L1, L2 first line, second line Lu U-phase line Lv V-phase line Lw W-phase line P1 to P6 1st rotation position to 6th rotation position S1 to S6 1st switch to 6th switch S11 to S16 11th switch to 16th switch S22 to S26 22nd switch to 26th switch S31-S36 31st switch-36th switch S41-S46 41st switch-46th switch S5 ~S57 51 switches, second 57 switches SA mode changeover switches SW1, SW2 first switching unit, the second switching unit T1, T2 the first terminal, a second terminal UT U-phase terminal VT V-phase terminal WT W phase terminal

Claims (11)

A plurality of resistance units each including a battery group including one or more secondary batteries and a charging circuit;
A load test apparatus comprising a switching unit used for switching a connection method of the battery group, and performing a load test by supplying power from a test target power source to the resistance unit,
The plurality of resistance units are connected in parallel with the power source to be tested,
The switching unit includes a first switching unit and a second switching unit,
The first switching unit is used to switch a resistance unit connected to the test target power source among the plurality of resistance units.
The second switching unit is used to switch a battery group connected to an external electric device among battery groups provided in each of the plurality of resistance units.
The plurality of resistance units can be switched between being connected in series and connected in parallel to the electrical device via the second switching unit,
The second switching unit includes a first switch group including a switch connected to one terminal of the battery group, and a second switch group including a switch connected to the other terminal of the battery group; Have
When supplying electric power to the electrical device, connection is made to at least one battery group of the battery groups via at least one switch of the first switch group and at least one switch of the second switch group. ,
A battery group connected in series, a battery group connected in parallel, and a battery group not used for power supply among all of the plurality of battery groups via the first switch group and the second switch group In a state that can be changed, it is possible to supply power to the electrical equipment,
The switches constituting the first switch group are single-pole single-throw types having two terminals,
The switches constituting the second switch group are single-pole double-throw types having two terminals and one common terminal,
One of the terminals in the switches constituting the first switch group is connected to one terminal of the battery group and one terminal of the charging circuit,
One of the terminals in the switches constituting the second switch group is connected to the other terminal of the battery group and the other terminal of the charging circuit,
The other of the terminals in the switches constituting the first switch group is connected to the other of the terminals in the switches constituting the second switch group;
The other of the terminals in one of the switches constituting the first switch group is connected to one terminal of the electrical device,
The common terminal in the switch constituting the second switch group is connected to the other terminal of the other switch constituting the second switch group, or the other terminal of the electrical device,
Of the switches constituting the second switch group, the other of the terminals connected to the electrical device is the other of the terminals of the switches constituting the first switch group not connected to the electrical device. Connected to the other,
The other terminal of the battery group is connected to the other terminal of the other battery group via two single-pole double-throw switches constituting the second switch group, and is provided in parallel. A load test apparatus connected through a pole single throw type switch. The plurality of resistance units include a first battery group, a second battery group, a third battery group, a fourth battery group, a fifth battery group, and a sixth battery group as the plurality of battery groups. The circuit includes a first charging circuit, a second charging circuit, a third charging circuit, a fourth charging circuit, a fifth charging circuit, and a sixth charging circuit,
The second switching unit has a 22nd switch, a 23rd switch, a 24th switch, a 25th switch, and a 26th switch as the single pole single throw type switches provided in parallel, and constitutes the first switch group The single-pole double-throw switch includes the 31st switch, the 32nd switch, the 33rd switch, the 34th switch, the 35th switch, and the 36th switch as the single-pole single-throw switch that constitutes the second switch group. As a switch, it has 41st switch, 42nd switch, 43rd switch, 44th switch, 45th switch, 46th switch,
One terminal of the first battery group is connected to one terminal of the first charging circuit and one of the terminals of the 31st switch,
One terminal of the second battery group is connected to one terminal of the second charging circuit and one of the terminals of the thirty-second switch,
One terminal of the third battery group is connected to one terminal of the third charging circuit and one of the terminals of the 33rd switch,
One terminal of the fourth battery group is connected to one terminal of the fourth charging circuit and one of the terminals of the 34th switch,
One terminal of the fifth battery group is connected to one terminal of the fifth charging circuit and one of the terminals of the 35th switch,
One terminal of the sixth battery group is connected to one terminal of the sixth charging circuit and one terminal of the 36th switch,
The other terminal of the first battery group is connected to the other terminal of the first charging circuit and one of the terminals of the 41st switch, and the other terminal of the second battery group via the 22nd switch. Connected,
The other terminal of the second battery group is connected to the other terminal of the second charging circuit and one of the terminals of the 42nd switch, and the other terminal of the third battery group via the 23rd switch. Connected,
The other terminal of the third battery group is connected to the other terminal of the third charging circuit and one of the terminals of the 43rd switch, and the other terminal of the fourth battery group via the 24th switch. Connected,
The other terminal of the fourth battery group is connected to the other terminal of the fourth charging circuit and one of the terminals of the 44th switch, and the other terminal of the fifth battery group via the 25th switch. Connected,
The other terminal of the fifth battery group is connected to the other terminal of the fifth charging circuit and one of the terminals of the 45th switch, and the other terminal of the sixth battery group via the 26th switch. Connected,
The other terminal of the sixth battery group is connected to the other terminal of the sixth charging circuit and one of the terminals of the 46th switch;
The other terminal of the first 41 switch, the first 31 being connected to the other and one terminal of the electrical equipment switch terminal, the common terminal of the first 41 switch, the other and the first of the second 42 switch terminal Connected to the other of the 32 switch terminals,
The common terminal of the 42 switch is connected to the other of the other and the terminal of the first 33 switch terminal of the first 43 switch,
A common terminal of the 43rd switch is connected to the other of the terminals of the 44th switch and the 34th switch;
A common terminal of the 44th switch is connected to the other of the terminals of the 45th switch and the 35th switch;
The common terminal of the 45th switch is connected to the other of the other and the terminal of the 36th switch terminal of the 46th switch,
The load testing apparatus according to claim 1, wherein the common terminal of the 46th switch is connected to the other terminal of the electrical device. An operation unit used for making a first selection for selecting a voltage of a battery group used to supply power to the electrical device;
A control unit that controls the operation of the second switching unit based on the first selection;
The operation unit includes a mode changeover switch used for switching between a mode for performing a load test of the power source to be tested and a mode for supplying power from the battery group to the electrical device,
The control unit is configured to release the electrical connection between the plurality of battery groups and the electrical device when the mode switch is set to a mode for performing a load test. The second switching unit so that the connection with one terminal of the battery group is released at the switch of the second switch and the connection with the other terminal of the battery group is released at the switch of the second switch group. The load test apparatus according to claim 1, wherein operation control of the unit is performed. The first switching unit has a switch group including a switch connected to at least one of one terminal and the other terminal of each of the battery groups,
In order to release the electrical connection between the plurality of battery groups and the power source to be tested when the mode switching switch is set to a mode in which power is supplied, the battery group in the switch of the switch group 4. The load test apparatus according to claim 3, wherein the operation control of the first switching unit is performed so that the connection between each of the first terminals and at least one of the other terminals is released. 5. A first operation switch that adjusts a load amount of the power source to be tested connected to the load test apparatus by performing an on / off operation for each of the plurality of resistance units, and a battery used to supply power to the electric device An operation unit including a second operation switch configured to be a rotary switch used to make a first selection for selecting a voltage of the group;
The load test apparatus according to claim 1, further comprising a control unit that performs operation control of the second switching unit based on the first selection.   6. The load test apparatus according to claim 5, wherein the control unit preferentially uses a battery with a large remaining battery capacity among the plurality of battery groups to control the operation of the second switching unit.   The control unit performs switching control of a battery group used for power supply to the electrical device among the battery group according to a remaining battery level while power supply to the electrical device is performed. The load test apparatus according to claim 6. The operation unit includes a mode changeover switch used for switching between a mode for performing a load test of the power source to be tested and a mode for supplying power from the battery group to the electrical device,
The control unit is configured to release the electrical connection between the plurality of battery groups and the electric device when the mode change switch is set to a mode for performing a load test. And when the mode change switch is set to a mode in which power is supplied, the first battery is disconnected from the plurality of battery groups and the power source to be tested. 6. The load test apparatus according to claim 5, wherein operation control of the switching unit is performed. The test target power source is a three-phase AC power source,
Any two of the U-phase wire, V-phase wire, and W-phase wire connected to the power source to be tested are connected to each of the plurality of resistance units,
The resistance unit is provided in a set number of multiples of 3,
The number of sets of the plurality of resistance units connected to the U-phase line, the number of sets of the plurality of resistance units connected to the V-phase line, and the W phase of the plurality of resistance units The load test apparatus according to claim 1, wherein the number of sets connected to the line is equal. An operation unit used for performing a second selection for selecting a power supply to the electric device from the battery group and a third selection for selecting a connection method of the battery group selected in the second selection;
The load test apparatus according to claim 1, further comprising a control unit that performs operation control of the second switching unit based on the second selection and the third selection. A plurality of resistance units each including a battery group including one or more secondary batteries and a charging circuit;
A load test apparatus comprising a switching unit used for switching a connection method of the battery group, and performing a load test by supplying power from a test target power source to the resistance unit,
The plurality of resistance units are connected in parallel with the power source to be tested,
The switching unit includes a first switching unit and a second switching unit,
The first switching unit is used to switch a resistance unit connected to the test target power source among the plurality of resistance units.
The second switching unit is used to switch a battery group connected to an external electric device among battery groups provided in each of the plurality of resistance units.
The plurality of resistance units can be switched between being connected in series and connected in parallel to the electrical device via the second switching unit,
The second switching unit includes a first switch group including a switch connected to one terminal of the battery group, and a second switch group including a switch connected to the other terminal of the battery group; Have
When supplying electric power to the electrical device, connection is made to at least one battery group of the battery groups via at least one switch of the first switch group and at least one switch of the second switch group. ,
A battery group connected in series, a battery group connected in parallel, and a battery group not used for power supply among all of the plurality of battery groups via the first switch group and the second switch group In a state that can be changed, it is possible to supply power to the electrical equipment,
The switches constituting the first switch group are single-pole single-throw types having two terminals,
The switches constituting the second switch group are single-pole double-throw types having two terminals and one common terminal,
The plurality of resistance units include a first battery group, a second battery group, a third battery group, a fourth battery group, a fifth battery group, and a sixth battery group as the plurality of battery groups. The circuit includes a first charging circuit, a second charging circuit, a third charging circuit, a fourth charging circuit, a fifth charging circuit, and a sixth charging circuit,
The second switching unit has a 22nd switch, a 23rd switch, a 24th switch, a 25th switch, and a 26th switch as single-pole single-throw switches, and constitutes the first switch group. The switch includes a thirty-first switch, a thirty-second switch, a thirty-third switch, a thirty-fourth switch, a thirty-fifth switch, and a thirty-sixth switch, and a forty-first switch that constitutes the second switch group, 42nd switch, 43rd switch, 44th switch, 45th switch, 46th switch,
One terminal of the first battery group is connected to one terminal of the first charging circuit and one of the terminals of the 31st switch,
One terminal of the second battery group is connected to one terminal of the second charging circuit and one of the terminals of the thirty-second switch,
One terminal of the third battery group is connected to one terminal of the third charging circuit and one of the terminals of the 33rd switch,
One terminal of the fourth battery group is connected to one terminal of the fourth charging circuit and one of the terminals of the 34th switch,
One terminal of the fifth battery group is connected to one terminal of the fifth charging circuit and one of the terminals of the 35th switch,
One terminal of the sixth battery group is connected to one terminal of the sixth charging circuit and one terminal of the 36th switch,
The other terminal of the first battery group is connected to the other terminal of the first charging circuit and one of the terminals of the 41st switch, and the other terminal of the second battery group via the 22nd switch. Connected,
The other terminal of the second battery group is connected to the other terminal of the second charging circuit and one of the terminals of the 42nd switch, and the other terminal of the third battery group via the 23rd switch. Connected,
The other terminal of the third battery group is connected to the other terminal of the third charging circuit and one of the terminals of the 43rd switch, and the other terminal of the fourth battery group via the 24th switch. Connected,
The other terminal of the fourth battery group is connected to the other terminal of the fourth charging circuit and one of the terminals of the 44th switch, and the other terminal of the fifth battery group via the 25th switch. Connected,
The other terminal of the fifth battery group is connected to the other terminal of the fifth charging circuit and one of the terminals of the 45th switch, and the other terminal of the sixth battery group via the 26th switch. Connected,
The other terminal of the sixth battery group is connected to the other terminal of the sixth charging circuit and one of the terminals of the 46th switch;
The other terminal of the first 41 switch, the first 31 being connected to the other and one terminal of the electrical equipment switch terminal, the common terminal of the first 41 switch, the other and the first of the second 42 switch terminal Connected to the other of the 32 switch terminals,
The common terminal of the 42 switch is connected to the other of the other and the terminal of the first 33 switch terminal of the first 43 switch,
A common terminal of the 43rd switch is connected to the other of the terminals of the 44th switch and the 34th switch;
A common terminal of the 44th switch is connected to the other of the terminals of the 45th switch and the 35th switch;
The common terminal of the 45th switch is connected to the other of the other and the terminal of the 36th switch terminal of the 46th switch,
A common terminal of the 46th switch is connected to the other terminal of the electric device.

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