JP2000139031A - Battery charging system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the destruction of an equipment due to an electric shock or short circuit at a connector terminal of a battery charging circuit. SOLUTION: This charging system is provided with a pair of connectors 40 which are connected to each other for transmission of signals, a charger 10 for supplying power to these connectors, and a means 30 for detecting the connection of the connectors. The system is also provided with a circuit connection means 20 for connecting a power supply circuit between the connectors and the charger when the interconnection between connectors are found by the means 30. Due to this structure, even if the charger 10 is powered on when the connectors are not interconnected, the circuit connection means 20 does not connect the circuit between the charger 10 and the connectors 40 since the interconnection of the connectors is not detected by the means 30. Thereby no potential is applied to the terminals of the connectors and therefore there is no risk of destruction or other troubles of an equipment due to an electric shock or short circuit between electrodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger mounted on a vehicle, and more particularly to a battery charger mounted on the vehicle as a power source for driving a vehicle and a working device provided on the vehicle body. The present invention relates to a vehicle charging device that charges a discharged battery after returning to a warehouse.

[0002]

2. Description of the Related Art There are a large number of work vehicles equipped with a work device on a vehicle body and moving a vehicle to an arbitrary place for work. For example, an aerial work vehicle that has a boom that can freely rotate, undulate, expand and contract, etc. on a vehicle body, and moves a workbench provided at the tip of the boom to an arbitrary height to perform construction, It is used for work, construction work, maintenance work for aircraft and ships, and the like. Such a work vehicle is provided with a power unit for generating a required oil pressure on a vehicle body to obtain a hydraulic pressure for operating the work device, and a device configured to activate the power unit to operate the work device when necessary is used. I have.

As a drive source of the power unit, a method has been used in which the driving force of an engine of a vehicle is used, and the driving force is switched from transfer to operate a hydraulic pump of the power unit to obtain a required oil pressure. In view of the above, an increase in the number of so-called silent power units in which a small prime mover is soundproofly mounted separately from an engine of a vehicle and a hydraulic pump is operated by the driving force thereof is used. Further, in recent years, due to the problem of construction noise in a residential area, an electric motor is used as a drive source of a hydraulic pump, and an ultra-low noise type power unit which further reduces the noise level of the silent type power unit has been adopted. Is coming.

[0004] As described above, a working vehicle that operates a working device using an electric motor as a driving source is equipped with a dedicated battery unit as a power source of the motor separately from the battery of the vehicle. Work using the power stored in And
For example, when work is performed in the daytime, a cycle is performed in which, after returning to the garage in the evening, the battery is charged at night and the battery is fully charged to prepare for the next day's work. Here, the battery charging operation is performed by connecting the connector plug of the charger provided in the garage to the connector connection port of the vehicle, and turning on the power of the charger to connect the charger and the charging circuit of the battery of the vehicle. Connected and done.

[0005]

However, in the circuit configuration at the time of charging configured as described above, the charger with the connector plug of the charger completely connected to the connector connection port (receptacle) of the vehicle is provided. There is no problem when the power is turned on, but when the charger is turned on before the connectors are connected to each other, or when the connector plug is removed before the charger is turned off. However, since a potential is applied between the terminals of the connector plug of the charger (between the plus and minus electrodes), a current flows when the terminals are accidentally touched, resulting in an electric shock.

In particular, in the case where the connector connection port (receptacle) is located on the vehicle side and the cable end of the charger connected thereto has the plug terminal (metal electrode) exposed, the above described configuration is adopted. The problem of electric shock is liable to occur, and even if the electric shock is not caused, there is a problem that the plug terminal portion is erroneously short-circuited to damage the charger.

While the battery is being charged, the plug cable of the charger is connected to the receptacle of the vehicle as described above. However, if the operator runs the vehicle without noticing this, the connector is disconnected. There have been problems such as breakage, or damage caused by dragging the charger.

[0008] The present invention has been made in view of such a problem, and even when the power supply of the charger is turned on in a state where the connectors are not connected to each other, the charging due to electric shock or short-circuit between terminals is performed. To provide a safe vehicle battery charging device that does not cause damage to the device, and that the connector and the charger are damaged by accidentally running the vehicle while the connectors are connected to each other. It is an object of the present invention to provide a battery charging device for a vehicle without a battery.

[0009]

In order to solve the above-mentioned problems, a battery charging apparatus for a vehicle (for example, an aerial work vehicle 1 in the embodiment) according to the present invention comprises a battery 50 and a charger 10 as shown in FIG. And a pair of connectors 40 connected to each other for transmitting power, connector connection detecting means 30 for detecting whether or not the connectors 40 are connected to each other, the connector 40 and the charger 10 And a circuit connection means 20 provided in a power supply circuit for connecting and disconnecting the circuit, and the connection of the connector 40 is detected by the connector connection detection means 30 in the circuit connection means 20. The power supply circuit that connects the connector 40 and the charger 10 is configured to be connected only when necessary.

According to the above configuration, for example, even if the power of the charger 10 is turned on before the connectors 40 are mutually connected as described above, the connector connection detecting means 3
0 indicates that the connection between the connectors has not been detected.
The circuit connecting means 20 does not make a circuit connection between the charger 10 and the connector 40. Therefore, even if the power supply of the charger 10 is turned on, no potential is applied to the terminal portion of the connector 40, and there is no fear of electric shock or device damage due to a short between electrodes.

The vehicle battery charger according to the present invention comprises a battery 50 and a charger 10 as shown in FIG.
And a pair of connectors 40 connected to each other for transmitting electric power, connector connection detecting means 30 for detecting that the connectors are connected, and travel restricting means 60 for restricting travel of the vehicle. When the connection between the connectors is detected by the connector connection detecting means 30, the travel restricting means 60 regulates the traveling of the vehicle.

With this configuration, when the connector 40 is connected and the connector connection detecting means 30 detects the connection state of the connector 40, the traveling of the vehicle is regulated by the traveling regulating means 60. Therefore, even if the worker attempts to run the vehicle without noticing that the battery 50 is being charged, the vehicle does not run, and therefore, the connector is damaged or the connected charger is dragged. There is no need to worry about damaging this.

Here, as the connector connection detecting means 30 which fulfills the above function, for example, when one of the connectors is connected to the other connector, its state changes (for example, a position change or a magnetic change, Optical change, etc.). Examples of such a detector include a limit switch, a proximity switch, a reed switch, and a photo interrupter.

The connector connection detecting means 30 includes transmitting means (for example, transmitting means 34 and 38 in the embodiment) and receiving means (for example, receiving means 35 and 39 in the embodiment).
And the like, and one of the interconnected connectors 40 (for example, the connector plug 42B in the embodiment).
Has both a transmitting pole (for example, B3 in the embodiment) connected to the transmitting means of the connector connection detecting means 30 and a receiving pole (for example, B4 in the embodiment) connected to the receiving means. A connector (for example, the receptacle 42b in the embodiment) is connected to a connecting means (for example, b3, b4 in the embodiment) between the transmitting and receiving poles of the one connector (for example, b3, b4 in the embodiment) when the connector is connected. A connection means 36) such as a short-circuit line, and when the one connector and the other connector are connected and the transmission signal from the transmission means is received by the reception means, the two connectors are connected. It is preferable to configure so as to detect that it has been performed.

Alternatively, the connector connection detecting means 30 has a transmitting means and a receiving means, and the transmitting means of the connector connection detecting means is connected to one of the interconnected connectors (for example, the receptacles 43c and 44d in the embodiment). (For example, c3, d in the embodiment)
1 and d2) to the other connector (for example, connector plugs 43C and 44D in the embodiment) and the receiving pole (for example, C3, D1, D in the embodiment) connected to the receiving means.
2) are connected to each other by connecting the connectors, and when the transmission signal from the transmitting means is received by the receiving means, it is configured to detect that both connectors are connected. Is preferred.

As described above, the connector connection detecting means 30
With this configuration, it is possible to more accurately detect the connection state of the connector as compared with a detection unit that detects the mechanical position of the connectors, and it is possible to simplify the structure of both connector coupling portions, This can also avoid problems such as damage to the position detecting means due to rough handling.

The pair of connectors 40 as described above
Has a pole for transmitting power from the charger 10 and a pole constituting the connector connection detecting means 30, the pole for transmitting power from the charger 10 is more connected to the connector when interconnecting. It is preferable that the connection is made earlier than the pole (for example, the transmission pole or the reception pole) configuring the detection means 30. With this configuration, when the interconnection of the connector 40 is detected by the connector connection detection means 30, it means that the pole transmitting the power of the charger has been connected before that, and as a result, A reliable connection can be detected. Therefore, electric power is supplied during connection of the connector, and a spark occurs due to poor connection between the power transmission poles,
This can prevent problems such as fusion of the connector terminals.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. First, FIG. 9 shows an example in which the battery charger for a vehicle according to the present invention is applied to an aerial work vehicle, and this example will be described below. A battery 50 serving as a drive source of a battery-driven power unit 55 is mounted on the left and right sides of the rear portion of the vehicle body in the aerial work vehicle 1, and the battery 50 is charged by the charging device according to the present invention.

First, the aerial work vehicle 1 will be briefly described. A swivel 3 is provided on a body 2 of the aerial work vehicle 1 so as to be swivelable by a swivel motor (not shown), and a boom 4 is pivotally supported on the swivel 3 by an up-and-down cylinder 5. ing. The boom 4 is composed of a nested three-stage boom, and is extendable and retractable by an internal telescopic cylinder 6. A vertical post 7 is provided at the end of the boom 4 and is always vertically held by a leveling mechanism. A worktable 8 for an operator is mounted on the vertical post 7 so as to swing freely by a swing motor (not shown). Have been.

An operator who has boarded the work platform 8 of the aerial work vehicle 1 constructed as described above operates the operation panel provided on the work platform to make the boom swing, undulate, expand and contract, and the like. Move to an arbitrary high place to perform a high place work. Each operation of the boom is performed by the above-described swing motor, the up / down cylinder 5,
The operation is performed by supplying operating hydraulic pressure to the telescopic cylinder 6, a swing motor, and the like (these are collectively referred to as hydraulic actuators). A battery-driven power unit 5 is provided at the upper center of the vehicle body 2 as the operating oil pressure generating means.
5 is mounted.

The battery-powered power unit 55
The unit has an electric motor driven by the power of the battery 50, and the electric motor drives a hydraulic pump to generate a working oil pressure. Therefore, the electric power of the battery 50 is discharged and gradually consumed while operating the hydraulic actuators and performing the work at a high place. When no charging is performed, the electric current capacity of the electric motor is finally reduced. It will be in the state which cannot be driven.

Therefore, in a work vehicle using such a unit, when one day's work is completed and the vehicle returns to the garage, charging of the battery 50 is started so that the battery is fully charged and ready for the next day's work. I have to. The charging operation of the battery 50 is performed by connecting a connector plug of a charger provided in the garage to a connector connection port (receptacle) of the vehicle and turning on the power of the charger to connect the charging circuit of the charger and the battery. Connect and do.

In the vehicle battery charging apparatus according to the present invention, as shown in FIG.
The power supplied from 0 is connected to the battery 50 via the circuit connecting means 20 and the pair of connectors 40. Here, the connector 40 is a connector plug 41 on the charger side.
A and a receptacle 41a on the vehicle body side, and further provided with a connector connection detecting means 30 for detecting the connection state of the connector. A circuit (line) from the connector plug 41A to the charger 10 via the circuit connecting means 20 constitutes a power supply circuit in the claims.

The connector connection detecting means 30 includes a connector plug 41 as shown in FIG.
Limit switch 31 and receptacle 4 provided on A
Dog 32 and limit switch 31 provided in 1a
And a connector connection detector 33 for detecting the open / closed state of the contact point, and detects whether or not both connectors 41A and 41a are in a connected state. For example, when both connectors are connected and the contact of the limit switch is closed, a connection detection signal is output to the circuit connection means 20.

The circuit connecting means 20 provided between the charger 10 and the connector plug 41A is constituted by, for example, a circuit such as a relay or an electromagnetic switch, and based on a connection detection signal of the connector connection detecting means 30, The circuit between the two is opened and closed. That is, only when the connection detection signal is output from the connector connection detector 33, the circuit between the two is closed (connected) to supply the power supplied from the charger to the connector plug 41a.

With the above configuration, in a state where the connector plug 41A is not connected to the receptacle 41a, even if the power of the charger 10 is turned on, the circuit connecting means 20 causes the charger 10 and the connector plug 41A to be connected. Since the circuit between them is not connected, the connector plug 41
No potential is generated between the terminals A1 and A2 of A. Therefore, even if the procedure of the charging operation is erroneous, there is no possibility of electric shock or shortage of the equipment due to short circuit.

In the above embodiment, an example is shown in which the limit switch 31 and the dog 32 are used as an example of the connector connection detecting means 30 in this embodiment. However, the present invention is not limited to the above embodiment. Instead of the above limit switch, for example, a proximity sensor, a photo interrupter,
The same configuration can be obtained by using a reed switch or the like. As shown in FIG. 4, the sensor and the connection detector as described above may be provided on the receptacle 41a side, and the connection detection signal may be transmitted to the circuit connection means 20 via the connector 40. . With such a configuration, it is possible to prevent malfunction of the sensor and the like and further enhance the reliability of the charging device of the present invention.

FIG. 5 shows another embodiment of the vehicle battery charging apparatus according to the present invention. In this embodiment, the configuration of the connector 40 and the configuration of the connector connection detecting means 30 are different from those of the charging circuit of the above-described embodiment, and the other circuit configurations are the same. Accordingly, hereinafter, both the connector 40 and the connector connection detecting means 30 will be described, and the other constituent circuits which are not different from each other will be assigned the same reference numerals as those in the previous embodiment, and duplicate explanation will be omitted.

In this embodiment, the connector connection detecting means 30 includes a transmitting means 34 and a receiving means 35, and a connector connection detecting means is connected to one of the connectors 40 (the connector plug 42B in this embodiment shown in FIG. 5). Means 3
It has both a transmitting pole B3 connected to the transmitting means 34 of 0 and a receiving pole B4 connected to the receiving means 35. The other connector (receptacle 42b in the embodiment shown in FIG. 5) is provided with coupling means 36 for connecting between the b3 and b4 poles corresponding to the transmitting pole B3 and the receiving pole B4 when the connector is connected. .

Here, as the transmitting means 34 and the receiving means 35, for example, a light emitting element and a light receiving element are used.
6, an optical method using an optical fiber, a mirror or the like, or a weak voltage (for example, about several volts) is applied between the transmitting means 34 and the ground, a short-circuit wire is used for the coupling means 36, and the receiving means 35 is connected to the ground. An electrical method such as a method for detecting a potential difference between them, a method for detecting a resistance between the transmitting means 34 and the receiving means 35 using a short-circuit line as the coupling means 36, a method for detecting a current passing through the receiving means 35, and the like. Etc. can be used.

In such a configuration, the connector plug 42
When B and the receptacle 42b are connected, the output signal from the transmitting means 34 is received by the receiving means 35 through the coupling means 36, and conversely, when the connector 40 is not connected to the Does not reach the receiving means 35. Accordingly, the connector connection detecting means 30 outputs a connector connection detecting signal to the circuit connecting means 20 assuming that the connectors are connected to each other when the transmitting signal is detected by the receiving means 35. The power supplied from the charger 10 is supplied to the battery 50 via the connector 40 based on the signal.

According to the above configuration, when the connectors 40 are not connected to each other, the transmission signal from the transmitting means 34 does not reach the receiving means 35 and the connector connection detecting means 3
Since no connection detection signal is output from 0, no voltage is applied between the terminals B1 and B2 of the connector plug 42B. Therefore, even if the procedure of the charging operation is erroneous, the device is not damaged due to electric shock or short circuit.

Next, FIG. 6 shows another embodiment of the vehicle battery charging apparatus according to the present invention. In this embodiment, the configuration of the connector 40 and the configuration of the connector connection detecting means 30 are different from those of the charging circuits of the above-described embodiments, and the other circuit configurations are the same. Therefore, the connector 40 and the connector connection detecting means 30
Will be described, and the other constituent circuits will be assigned the same reference numerals as in the previous embodiment, and redundant description will be omitted.

In this embodiment, the connector connection detecting means 30 includes a transmitting means 34 and a receiving means 35, and is connected to one of the pair of connectors 40 (the receptacle 43c in the embodiment shown in FIG. 6). The transmitting pole c3 connected to the transmitting means 34 is connected to the other connector (the connector plug 43C in the embodiment shown in FIG. 6).
Has a receiving pole C3 connected to the receiving means 35.

Here, the transmitting means 34 and the receiving means 35 can use the same method as in the above-described embodiment. For example, when using an electric method and not having a common ground, the connector terminals are respectively provided. Channels are added one by one (C4, c4) and these can be used as ground lines.

In this configuration, when the connectors 40 are connected to each other, the transmission signal from the transmitting means 34 is transmitted through the receptacle 43c and the connector plug 43C to the receiving means 35.
When the connectors 40 are not connected to each other, the transmission signal from the transmitting means 34 does not reach the receiving means 35. Accordingly, the connector connection detecting means 30 outputs a connector connection detecting signal to the circuit connecting means 20 assuming that the connectors are connected to each other when the transmitting signal is detected by the receiving means 35. The power supplied from the charger 10 is supplied to the connector 4 based on the signal.
0 to the battery 50.

According to the above configuration, when the connectors 40 are not connected to each other, the transmission signal from the transmitting means 34 does not reach the receiving means 35 and the connector connection detecting means 3
Since no connection detection signal is output from 0, no voltage is applied between the terminals C1 and C2 of the connector plug 43C. Therefore, even if the procedure of the charging operation is erroneous, the device is not damaged due to electric shock or short circuit.

Next, FIG. 7 shows another embodiment of the embodiment shown in FIG. 6. In this embodiment, a circuit for detecting connector connection is provided so as to be superimposed on a battery charging circuit. ing. That is, the transmitting means 38 of the connector connection detecting means 30 is provided on the battery charging circuit 52 so that the transmitting signal is superimposed on the power supply line and the receptacle 44d.
Send to The receiving means 39 branches the supply line from between the connector plug 44D and the circuit connecting means 20, and receives the branched signal.

Here, as the transmitting means 38, for example, the remaining voltage of the battery can be used as it is or a voltage obtained by dividing the remaining voltage to a low voltage. In this case, the receiving means 39 uses the voltage between the terminals D1 and D2. Is monitored, the connection state of the connector 40 can be detected.

However, in the above method, although no potential is generated between the terminals D1 and D2 of the connector plug 44D before the connectors 40 are connected to each other, the circuit connecting means is not used once the connectors 40 are connected to each other. 20 connects the circuit between the charger 10 and the connector plug 44D, and then the connector plug 44D
Even if it is disconnected from D, the voltage supplied from the charger side is applied between the terminals D1 and D2, and the receiving means cannot detect that the connector is opened.

Therefore, in such a case, for example, the power supplied from the charger 10 is converted into a pulsed DC power (for example, a rectangular wave power of 0-15 V) such that the output voltage becomes 0 [V] at regular intervals. This can be avoided by detecting a voltage drop between pulses or by providing such a function to the circuit connecting means.

Since the power supply from the charger 10 to this battery is supplied as DC power adapted to the voltage of the battery mounted on the work vehicle, the connection detection signal output from the transmitting means 38 is converted to a constant AC power. It is also possible to use a method of outputting as a frequency, and the receiving means 39 separating the DC component from the detected current waveform and detecting whether or not the constant AC frequency component is included.

With such a configuration, it is possible to detect whether or not the connectors 40 are connected to each other, and the receiving means 39 sends a connector detection signal to the circuit when it is detected that the connector 40 is connected. It outputs to the connection means 20 and supplies the electric power from the charger 10 to the battery based on this signal. Therefore, when the connectors 40 are not connected to each other, the terminals D1, D2 of the connector plug 44D are not connected.
No voltage is applied to D2, and there is no risk of equipment damage due to electric shock or short circuit.

When the connector 40 of each embodiment described above has a pole for transmitting power from the charger 10 and a pole constituting the connector connection detecting means 30, when the connectors are connected to each other, the charging is performed. The poles (for example, B 1 -b 1, B 2 -b 2, and the same in other embodiments) that transmit the power from the device 10 are the poles that constitute the connector connection detecting means 30 (for example, the transmission pole or the reception pole, etc.). The same applies to other embodiments, such as B3-b3, B4-b4, etc., and it is desirable that the connection be made earlier in time than, for example, A3-a3, C3-c3).

With this configuration, when the connector connection is detected by the connector connection detecting means 30, the power transmission poles (eg, B1-b1, B2) of the power supply circuit from the charger 10 are detected before the detection. -B2, the same applies to other embodiments), so that a reliable connection of the connector can be detected. Accordingly, it is possible to prevent the occurrence of sparks due to poor connection of the connector and the accompanying problems such as fusion of the connector terminals.

Next, a battery charging device for another vehicle according to the present invention will be described. The vehicle battery charging device described so far includes the connector connection detecting means 30.
On the basis of the detection signal of the above, while preventing power supply to the connector in a state where the connectors are not connected,
The invention described below restricts the running of the vehicle at the time of connector connection based on a detection signal of the connector connection detection means 30 to prevent damage to the connector and the charger.

That is, the connector connection detecting means 30
Any one of the detection methods of the embodiments described so far is used, and when the connectors are connected to each other by this detection means, the travel of the vehicle is restricted by the travel restriction means 60. is there. Hereinafter, as one embodiment, in addition to the embodiment described with reference to FIG. 5, a battery charging device for a vehicle further provided with a vehicle travel restriction unit will be described with reference to FIG. 8.

The present embodiment is different from the above-described embodiment of FIG. 5 in the configuration of the connector 40 and the configuration of the travel restricting means 60, but the other components are the same as those in FIG. Therefore, hereinafter, both the connector 40 and the travel restricting means 60 will be described, and the other constituent circuits which are not different from each other will be assigned the same reference numerals as those in the previous embodiment, and redundant description will be omitted.

In this embodiment, the connector plug 45
When B is connected to the receptacle 45b, an output signal from the transmitting means 34 of the connector connection detecting means 30 is received by the receiving means 35 via the coupling means 36, and the connection state between the connectors is detected. At this time, the connector connection detection means 30 transmits the connector connection detection signal to the circuit connection means 20 and the terminal B5-b of the connected connector 40.
5 and output to the travel restricting means 60.

The traveling restricting means 60 regulates the traveling of the vehicle so that the vehicle does not travel when the connector connection detection signal is input. As a method of restricting the running of the vehicle, for example, the power supply circuit from the battery is maintained in a disconnected state, the operation of a running starter (starter motor) of the vehicle is controlled, and the forward / reverse switching device is locked in neutral or parking. And the like.

It is preferable that the travel regulation means includes a warning generation means to which a connector is connected in addition to the travel regulation and which issues a warning that the travel regulation is applied to the vehicle. This warning generating means may be, for example, a display for indicating that the connector is connected to the driver's seat for charging the battery, or an operation for the operator to drive the vehicle (for example, inserting a key). Means for generating an alarm by sound or light when the operation is performed can be used.

By configuring the battery charging circuit in this manner, the worker tries to run the vehicle without recognizing that the connector plug of the charger is connected to the receptacle of the vehicle for charging the battery. Even in the case of running, the running control of the vehicle is applied by the running control means,
In addition, by displaying or warning to that effect,
It is possible to know that the connector is connected and the travel regulation is operating. Therefore, there is no possibility that the connector is erroneously damaged, or the charger is dragged to travel to damage the connector.

In this embodiment, an example in which the connector connection detecting means 30 has been described with reference to FIG. 5 and the vehicle travel restricting means 60 has been added has been described. Is not limited to the example shown in this embodiment, and may use another detection method already described. In this embodiment, the example in which the travel restricting means is added has been described. However, for example, as shown in FIG. 2, it is also possible to configure only the travel restricting means 60 provided on the vehicle side without using the circuit connecting means 20. it can. In any case (or particularly in such a case), it is obvious that the connector connection detecting means 30 can be provided on the receptacle side provided in the vehicle (for example, as shown in FIG. 3 by way of example). It is.

[0054]

As described above, according to the present invention,
A pair of connectors provided between the battery mounted on the vehicle and the charger outside the vehicle body and connected to each other to transmit power, and connector connection detection means for detecting that the connectors are connected to each other Circuit connection means provided in a power supply circuit connecting the connector and the charger and configured to be able to connect and disconnect the circuit. The circuit connection means detects connection of the connector by the connector connection detection means. The battery charging device is configured so that the power supply circuit connecting the connector and the charger is connected only when the charging is performed.

For this reason, even if the charger is turned on in a state where the connectors are not connected to each other, for example, the connection between the connectors is not detected by the connector connection detecting means. The means does not make a circuit connection between the charger and the connector. Therefore, no electric potential is applied to the connector terminal portion, and therefore, there is no fear of electric shock or device damage due to a short circuit between the electrodes.

According to another battery charger for a vehicle according to the present invention, a pair of connectors provided between the battery and the charger and connected to each other to transmit power are connected to the connector. And a travel restricting means for restricting travel of the vehicle. When the connection between the connectors is detected by the connector connection detect means, the travel restricting means restricts the travel of the vehicle. Be composed.

With this configuration, when the connector is connected and the connector connection detecting means detects the connection state of the connector, the traveling of the vehicle is regulated by the traveling regulating means. For this reason, the worker does not notice that the connector of the charger is connected to the vehicle to charge the battery, and the vehicle does not run even if the vehicle is erroneously driven, and therefore, the connector is damaged. There is no worry that the battery charger will be damaged due to dragging or the connected charger.

Here, the connector connection detection means has a transmission means and a reception means, and one of the interconnected connectors has a transmission pole connected to the transmission means of the connector connection detection means, and a connection to the reception means. And the other connector has coupling means for connecting between the two poles corresponding to the transmission pole and the reception pole of the one connector when the connector is connected, When the connector and the other connector are connected and a transmission signal from the transmission unit is received by the reception unit, it is configured to detect that the two connectors are connected.

Alternatively, the connector connection detection means has a transmission means and a reception means, and one of the interconnected connectors has a transmission pole connected to the transmission means of the connector connection detection means, and the other connector has Detecting that both connectors are connected when a receiving pole connected to the receiving means is connected to each other by connecting the connectors and a transmitting signal from the transmitting means is received by the receiving means. It is constituted so that.

By configuring the connector connection detecting means as described above, even if the charger is powered on in a state where the connectors are not connected to each other, the receiving means of the connector connection detecting means can be used. Since the transmission signal of the transmission means has not been received and the connection between the connectors has not been detected, the circuit connection means does not perform the circuit connection between the charger and the connector. Therefore, the same effects as described above can be obtained. Further, according to such a configuration, the structure of both connector coupling portions can be simplified as compared with a detecting means for detecting a relative position between the connectors, and a malfunction of the connector can be suppressed by further suppressing malfunction. The disconnection state can be detected.

Incidentally, the pair of connectors as described above is configured such that, when interconnected, the pole for transmitting the power from the charger is connected before the pole constituting the connector connection detecting means. It is desirable. With such a configuration, it is possible to detect a reliable connection of the connector, and thus it is possible to prevent a problem such as generation of a spark due to a poor connection of the connector and accompanying fusion of the connector terminals.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to a claim of a battery charging device for a vehicle according to the present invention.

FIG. 2 is a diagram corresponding to a claim of a battery charging device of another vehicle according to the present invention.

FIG. 3 is a configuration diagram illustrating an embodiment of a vehicle battery charging apparatus according to the present invention.

FIG. 4 is a configuration diagram showing another example of the above embodiment.

FIG. 5 is a configuration diagram showing another embodiment of the vehicle battery charging apparatus according to the present invention.

FIG. 6 is a configuration diagram showing another embodiment of the vehicle battery charging apparatus according to the present invention.

FIG. 7 is a configuration diagram showing another example of the above embodiment.

FIG. 8 is a configuration diagram showing an embodiment of a battery charging device for another vehicle according to the present invention.

FIG. 9 is a bird's-eye view of an aerial work vehicle equipped with the vehicle battery charger according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle (aerial work vehicle) 2 Body 10 Charger 12 Power supply circuit 20 Circuit connection means 30 Connector connection means 34, 38 Transmission means 35, 39 Receiving means 36 Coupling means 40 Connector 50 Battery 55 Electric device (Battery driven power unit) 60) Traveling control means a3, B3, c3, d1, d2 Transmitting poles A3, B4, C3, D1, D2 Receiving poles

Claims (6)

[Claims] 1. A battery charger for a vehicle that receives power supply from a charger and charges a battery disposed on a vehicle body, wherein the battery charger is provided between the battery and the charger, and is connected to each other to supply power. And a connector connection detecting means for detecting that the connector is connected, provided in a power supply circuit connecting the connector and the charger, and disconnecting and connecting the circuit. And a circuit connection unit configured to connect the power supply circuit when the connection of the connector is detected by the connector connection detection unit. 2. The vehicle battery charging device according to claim 1, further comprising a travel restricting means for restricting travel of the vehicle when the connection of the connector is detected by the connector connection detection means. A battery charging device for a vehicle according to claim 1. 3. A battery charger for a vehicle that receives power supply from a charger disposed outside a vehicle body and charges a battery disposed on the vehicle body, wherein the battery charging device is provided between the battery and the charger. A pair of connectors connected to each other to transmit power, a connector connection detecting means for detecting that the connectors are connected, and a connection of the connector being detected by the connector connection detecting means. A vehicle battery charging device comprising: a travel restriction unit configured to regulate travel of the vehicle. 4. The connector connection detecting means has a transmitting means and a receiving means, and one of the connectors has a transmitting pole connected to the transmitting means and a receiving pole connected to the receiving means. The other of the connectors has coupling means for connecting between the two poles corresponding to the transmitting pole and the receiving pole, and the one connector and the other connector are connected to transmit from the transmitting means. The vehicle battery charging device according to any one of claims 1 to 3, wherein when the signal is received by the receiving means, the connection is detected as being both connectors. 5. The connector connection detecting means has a transmitting means and a receiving means, one of the connectors has a transmitting pole connected to the transmitting means, and the other of the connectors has the receiving pole. A receiving pole connected to the means, and when the one connector and the other connector are connected and a transmission signal from the transmission means is received by the reception means, the two connectors are connected. The battery charging device for a vehicle according to any one of claims 1 to 3, wherein the battery charging device detects that the vehicle is charging. 6. The pair of connectors have a pole for transmitting electric power from the charger and a pole constituting the connector connection detecting means. The pair of connectors are connected to each other from the charger when interconnected. 6. The vehicle according to claim 1, wherein a pole that transmits the electric power is connected earlier than a pole that constitutes the connector detection unit. 7. Battery charger.