JP3895699B2 - Discharge device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a discharge device for a vehicle.
[0002]
[Prior art]
In a vehicle such as an electric vehicle equipped with a large-capacity battery or a capacitor, for example, when performing maintenance work for the power storage unit, before performing this maintenance work, connect the terminal of the discharge line extending from the discharge device in the middle of the power storage circuit. There are cases where residual electric charges are discharged by this discharge device.
[0003]
[Patent Document 1]
JP 2001-203133 A [Patent Document 2]
Japanese Patent Laid-Open No. 2001-16798
[Problems to be solved by the invention]
However, in the conventional discharge device, the terminal of the discharge line extending from the discharge device must be connected in a live line state to the power storage circuit of the vehicle at the time of performing the discharge operation, so it is necessary to pay sufficient attention to safety. It was.
[0005]
This invention has been made in view of the above problems, and an object thereof is to provide a discharge apparatus for a vehicle which can be performed safely discharging operations.
[0006]
[Means for Solving the Problems]
A first invention includes a rotating electrical machine mounted on a vehicle, a power storage unit that stores electric power, a power storage circuit that transfers power between the rotating electrical machine and the power storage unit, and a power storage circuit switch that intermittently connects the power storage circuit The present invention is applied to a discharge device that is used by being connected to a power storage circuit of a vehicle.
[0007]
And it shall have the discharge circuit connected to an electrical storage circuit, and discharging the electrical energy of an electrical storage part, and the discharge control circuit which controls the action | operation of an electrical storage circuit switch.
[0008]
According to a second invention, in the first invention, a residual voltage detecting means for detecting a residual voltage of the power storage unit is provided.
[0009]
According to a second invention, in the first or second invention, an operation detecting means for detecting the operation of the storage circuit switch is provided.
[0010]
Operation and effect of the invention
In the first invention, for example, by connecting the terminal of the discharge line extending from the discharge circuit to the storage circuit in a state where the storage circuit switch is opened via the discharge control circuit, the discharge line is connected to the storage circuit in the live line state. Connection is avoided, there is no fear of electric shock, etc., and discharge work can be performed safely.
[0011]
In the second invention, the storage circuit switch can be opened and closed while detecting the residual voltage of the power storage unit, and the residual voltage of the capacitor unit can be easily adjusted.
[0012]
In the third invention, it is possible to easily confirm the operating state of the storage circuit switch.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0014]
FIG. 1 is an electric circuit diagram of a hybrid system provided in a hybrid vehicle. In this figure, 1 is a capacitor unit, 2 is a junction box (terminal box), 3 is an inverter, 4 is a motor for traveling, and 22 is a storage circuit for transferring power between the motor 4 and the capacitor unit 1.
[0015]
The capacitor unit 1 includes an upper unit 5 and a lower unit 6 configured by a large number of capacitors as a power storage unit, and stores predetermined power. The power storage unit is not limited to a capacitor, and a chemical battery may be used.
[0016]
The inverter 3 converts the DC power of the capacitor unit 1 into AC power and supplies it to the traveling motor 4, and converts AC power generated by the traveling motor 4 into DC power to charge the capacitor unit 1.
[0017]
As shown also in FIG. 3, a pair of power switches 17, 18, a storage circuit switch 19, and a fuse 29 are interposed inside the junction box 2.
[0018]
The power switches 17 and 18 are used to connect and disconnect the power storage circuit 22 and are provided on the terminal side of the power storage circuit 22. The power switches 17 and 18 are closed when the vehicle is in operation, and the electric power of the capacitor unit 1 is supplied to the inverter 3, while the power switch 17 and 18 is opened when the vehicle is stopped to stop the discharge of the capacitor unit 1.
[0019]
The storage circuit switch 19 is used to interrupt the storage circuit 22 and is interposed between the upper unit 5 and the lower unit 6 of the capacitor unit 1. The storage circuit switch 19 is closed during normal operation to connect the upper unit 5 and the lower unit 6 in series, and the electric power of the capacitor unit 1 is supplied to the inverter 3 while being opened under predetermined operating conditions. The unit 5 and the lower unit 6 are separated, and various controls of the capacitor unit 1 are performed.
[0020]
The junction box 2 includes a control terminal 10, and a control wiring extending from a controller (not shown) is connected to the control terminal 10. The operation of the switches 17 to 19 and the inverter 3 is controlled by this controller.
[0021]
By the way, for example, when performing maintenance work or the like of the capacitor unit 1, before performing this maintenance work, a discharge work for discharging the residual charges by connecting the discharge device 30 shown in FIG. 2 to the capacitor unit 1 may be performed.
[0022]
In order to perform the discharge operation safely, a discharge terminal 25 connected to the storage circuit 22 is provided inside the junction box 2. The discharge terminal 25 has positive and negative terminals connected to the storage circuit 22 respectively. The terminals of a pair of discharge lines 31 extending from the discharge device 30 are inserted into the discharge terminals 25.
[0023]
The discharge device 30 includes a discharge circuit 32 that is connected to the storage circuit 22 via the discharge terminal 25 and the discharge line 31 and releases the electric energy of the capacitor unit 1, and the storage circuit via the control terminal 10 and the control wiring 37. A discharge control circuit 38 for controlling the opening / closing operation of the switch 19 is provided, and 31 terminals extending from the discharge circuit 32 are connected to the storage circuit 32 in a state where the storage circuit switch 19 is opened.
[0024]
A resistor 33, a leakage breaker 34 and a voltmeter 39 are interposed in the discharge circuit 32. The resistor 33 converts the electric energy flowing through the discharge circuit 32 into heat energy and discharges it. The earth leakage breaker 34 interrupts the overcurrent flowing through the discharge circuit 32.
[0025]
The voltmeter 39 measures the voltage of the storage circuit 22 and constitutes a residual voltage detection means for detecting the residual voltage of the capacitor unit 1.
[0026]
In the discharge control circuit 38, the control wiring 37 is connected to the control terminal 10 of the junction box 2. The discharge control circuit 38 includes an operation switch 35 that energizes the relay coil 20 of the storage circuit switch 19 and a power source 36. When the operation switch 35 closes the contact a side, the relay coil 20 is energized and the storage circuit switch 19 is closed. On the other hand, when the operation switch 35 opens the contact a side, the energization of the relay coil 20 is stopped and the storage circuit switch 19 is opened.
[0027]
The discharge device 30 includes a detection circuit 41 as an operation detection unit that detects the operation of the storage circuit switch 19. The detection circuit 41 includes an auxiliary contact 28 that opens and closes in conjunction with the storage circuit switch 19, and a confirmation lamp 36 that energizes through the auxiliary contact 28. When the two-contact type operation switch 35 closes the contact b side, the confirmation lamp 36 is energized through the operation switch 35 and the auxiliary contact 28 of the storage circuit switch 19 and is lit. By operating the operation switch 35 in this manner, it is possible to easily confirm the operating state of the storage circuit switch 19 by looking at the confirmation lamp 36.
[0028]
The discharging operation for discharging the capacitor unit 1 through the discharging device 30 is performed according to the following procedure.
(1) Connect the control wiring 37 of the discharge device 30 to the control terminal 10.
(2) The terminal of the discharge line 31 extending from the discharge device 30 is inserted into the discharge terminal 25.
(3) The operation switch 35 closes the contact a side, and the storage circuit switch 19 is closed. Thereby, the residual charge of the capacitor unit 1 flows into the discharge device 30 and is discharged.
[0029]
By connecting the terminal of the discharge line 31 extending from the discharge circuit 32 to the storage circuit 32 with the storage circuit switch 19 opened, the discharge line 31 is connected to the junction box 2 in the live state. The connection is avoided, and a high voltage does not flow when the discharge line 31 is connected, so that the discharge operation can be performed safely.
[0030]
Further, the residual voltage of the capacitor unit 1 can be easily adjusted by opening and closing the storage circuit switch 19 while detecting the residual voltage of the capacitor unit 1 via the voltmeter 39.
[0031]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is an electric circuit diagram of a hybrid system showing an embodiment of the present invention.
FIG. 2 is an electric circuit diagram of a hybrid system that also includes a discharge device.
FIG. 3 is a wiring diagram of the junction box.
[Explanation of symbols]
1 Capacitor unit (power storage unit)
DESCRIPTION OF SYMBOLS 10 Control terminal 19 Electric storage circuit switch 25 Discharge terminal 30 Discharge apparatus 31 Discharge line 32 Electric storage circuit 38 Discharge control circuit 39 Voltmeter (residual voltage detection means)
41 Detection circuit (operation detection means)

Claims (3)

A rotary electric machine mounted on a vehicle, a power storage unit for storing power, a power storage circuit for exchanging power between the rotating electric machine and the power storage unit, the power storage of the vehicle and a storage circuit switch intermittently the storage circuit A discharge device used in connection with a circuit,
A discharge device for a vehicle, comprising: a discharge circuit connected to the power storage circuit for discharging electrical energy of the power storage unit; and a discharge control circuit for controlling the operation of the power storage circuit switch. Discharging device for a vehicle according to claim 1, characterized in that with a residual voltage detecting means for detecting the residual voltage of the power storage unit. Discharging device for a vehicle according to claim 1 or 2, characterized in that it comprises an actuation detector for detecting actuation of said power storage circuit switch.

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