JPH0550946U - Battery power unit charging device - Google Patents

Abstract

(57) [Abstract] [Purpose] Efficient charging is performed without lowering the temperature of the working battery itself, which is the target of charging, even when charging in a low ambient temperature. A battery power unit is composed of a battery-powered work device and a work battery 1 that supplies drive power to the work device. In the system for charging the battery 1, a charger 5 for converting the electric power from the power source 20 into electric power having a charging voltage corresponding to the working battery 1 and supplying the electric power to the working battery to charge the working battery 5. An electric heating type heat panel 3 arranged near the work battery 1 and a heating electric power supply line 9a for supplying a part of electric power from the power source 20 to the electric heating type heat panel 3 during the charging operation of the charger 5. 9b and 9b, which are arranged in the heating power supply line and are turned on when the outside air temperature is equal to or lower than a predetermined temperature to supply power from the power source 20 to the electrothermal heat panel 3 through the heating power supply line. It is composed of an outside air temperature compatible switch 7.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a battery power unit including a battery-powered work device used in a work vehicle or the like and a work battery for supplying drive power to the device, and more specifically, charging for charging the work battery in the battery power unit. Regarding the device.

[0002]

[Prior Art]

 For example, a work device such as a boom provided in an aerial work vehicle is drive-controlled using hydraulic pressure. The hydraulic pump that supplies this hydraulic pressure may be driven by an electric motor that is driven by receiving power supply from a work battery mounted on the vehicle in order to reduce work noise. Note that this work battery is usually configured separately from the vehicle battery used for starting the engine in the vehicle, and the work battery and the battery power for driving the work device by the electric motor, hydraulic pump, etc. The unit is constructed.

In a work vehicle using such a battery power unit, since the electric power charged in the work battery is used when performing work, the work battery is charged each time after the charging power is used. There is a need. It should be noted that work by a work vehicle is usually performed during the day, and at this time, the work battery is charged at night.

[0004]

[Problems to be solved by the device]

 When charging the battery, there is a correlation between the temperature of the battery itself and the charging time (efficiency). If the battery temperature is low, the charging efficiency will decrease and a long charging time will be required. When the work vehicle is used during the day as described above and the work battery is charged for the next day's work at night, and when the outside air temperature during charging is low, such as in winter. However, since the temperature of the battery itself becomes low, the charging efficiency of the battery decreases, and it may not be possible to fully charge the battery by the next morning. In such a case, sufficient power cannot be obtained from the work battery in the work of the next day, leading to a problem that the working efficiency of the work device is reduced.

The present invention has been made in view of such a problem. Even when charging in a state where the outside temperature is low, it is possible to perform efficient charging without lowering the temperature of the working battery itself to be charged. It is an object of the present invention to provide a battery power unit charging device configured as described above.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, in the present invention, in a battery power unit including a battery-powered work device and a work battery for supplying drive power to the work device, the power from the power source is supplied to the work battery. A charger for converting the power having a corresponding charging voltage and supplying it to the work battery to charge the work battery; an electrothermal heat panel arranged in the vicinity of the work battery; and the charger. The power supply line for heating that supplies a part of the power from the power supply to the electrothermal heat panel during the charging operation of the power supply, and it is turned on when the outside air temperature is below the specified temperature. The charging device is composed of an outside temperature compatible switch that supplies power from the power supply to the electrothermal heat panel via the heating power supply line.

Although a part of the electric power from the power supply may be directly supplied to the electrothermal heating panel by the heating power supply line, it may be converted into a charging voltage corresponding to the working battery by the charger. A part of the electric power from the power source after the operation may be supplied to the electrothermal heat panel via the heating power supply line.

[0008]

[Action]

 When the work battery is charged using the charging device with such a configuration, when the outside air temperature is low (below a predetermined temperature), the outside air temperature corresponding switch is turned on and the power from the power supply is removed. A part is supplied to the electrothermal heat panel. The heat panel generates heat due to this power supply, and warms the work battery arranged close to this. As a result, even if the outside air temperature is low, the temperature of the working battery itself is high, so that the charging efficiency is high and the charging time is short.

[0009]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. An aerial work vehicle equipped with a battery power unit according to the present invention is shown in FIG. The aerial work vehicle 10 includes a swivel base 12 rotatably attached to a vehicle body 11, a boom 13 which is attached to an upper portion of the swivel base 12 so as to be capable of undulating, and is configured to extend and retract. It is equipped with a working device for high places, which includes a working table 14 attached to the tip. An operator who is on the workbench 14 can move to a desired height by turning the turntable 12 and moving the boom 13 up and down and extending and retracting.

Here, the respective operations of the swivel base 12 and the boom 13 are performed by the operation of a hydraulic actuator driven by hydraulic pressure (a hoisting cylinder 15 for hoisting the boom 13 and the like). In order to reduce the work noise, the aerial work vehicle 10 employs a system in which a hydraulic pump (not shown) that generates the above hydraulic pressure is driven by an electric motor (not shown). For this reason, the vehicle body 11 of the aerial work vehicle 10 is equipped with the work battery 1 for supplying electric power to the electric motor. The working battery 1 is housed in a battery box 2 provided on the upper part of the vehicle body 11 from the viewpoint of external appearance or ensuring stability. As can be seen from this, the battery power unit is composed of the working battery 1, the electric motor, the hydraulic pump, and the like.

By the way, when the work by the aerial work vehicle 10 is performed by using such a battery power unit, the charging power of the work battery 1 is consumed in accordance with the work, and accordingly, depending on the consumption. Therefore, it is necessary to charge the working battery 1. A system according to the present invention for performing this charging is shown in FIG. This system supplies electric power from the commercial power source 20 to the work battery 1 via the charger 5 to charge the work battery 1.

The charger 5 has a conversion unit 6 that converts the electric power of the power source 20 into a charging voltage corresponding to the battery 1. The converter 6 is connected to charging power supply lines 8b and 8c that extend in a pair and are composed of a line 8b having a plug 8a connected to the power source 20 and a line 8c connected to the battery 1. .. The heating power supply lines 9a and 9b are branched from the line 8b from the plug 8a to the conversion unit 6 in this line. A thermostat switch (switch corresponding to the outside temperature) 7 is provided in the heating power supply lines 9a and 9b, and the tip of the thermostat switch 7 is connected to the electrothermal heat panel 3 on which the battery 1 is mounted. The thermostat switch 7 is a switch that is turned on when the outside air temperature is equal to or lower than a predetermined temperature, that is, when the outside air temperature is cold, and allows power supply through the heat power supply lines 9a and 9b.

In the charging device having such a configuration, when the plug 8a is connected to the commercial power source 20, the power from the commercial power source 20 is sent to the conversion unit 6 through the charging power supply line 8b, and the battery 1 is supported here. After being converted into the charging voltage, this power is supplied to the battery 1 via the line 8c, and the battery 1 is charged. In this case, when the outside air temperature is low, the thermostat switch 7 is turned on, and a part of the electric power from the commercial power source 20 is sent to the electrothermal heat panel 3 through the heating power supply lines 9a and 9b. .. As a result, the heat panel 3 generates heat and the battery 1 is warmed up.

Therefore, even during charging in cold weather, the temperature of the working battery 1 itself is maintained at a high temperature to some extent, and the charging efficiency does not decrease. As a result, it is possible to prevent the charging time from becoming long even when the outside temperature is low. Therefore, for example, when the battery 1 is charged at night after working during the day, it is possible to perform efficient charging even when the outside temperature is low as in the winter, and the next morning. Can be fully charged to full charge.

The charger 5 may be mounted on the vehicle body 11 of the work vehicle 10, but may not be mounted on the vehicle body 11 and may be arranged at a place where the commercial power source 20 is present. In this case, the charger 5 is provided with the connector 5a, and the charging power supply line 8c and the heating power supply line 9b can be detachably separated in this portion. In this example, the battery power unit is used in the aerial work vehicle, but it goes without saying that the target using the battery power unit is not limited to this.

Further, in the above example, the heating power supply line 9a is branched from the charging power supply line 8b located between the plug 8a and the conversion unit 6, and the power of the commercial power supply 20 is directly sent to the heat panel 3. Was configured as. The present invention is not limited to this, and for example, as shown in FIG. 3, the charging power supply line 8c to the heating power supply line 9a located between the conversion unit 6 and the working battery 1 are connected to each other. Alternatively, the electric power after being branched and converted into the charging voltage by the conversion unit 6 may be sent to the heat panel 3.

[0017]

[Effect of the device]

 As described above, according to the present invention, the electrothermal heating panel is arranged in the vicinity of the working battery, and when the outside air temperature is low, the outside air temperature corresponding switch is turned on, and the charging operation of the battery by the charger is performed. Part of the power from the power source is supplied to the electrothermal heat panel, so part of the power from the power source is supplied to the electrothermal heat panel, which generates heat and is placed close to it. Warm the work battery. As a result, even if the outside air temperature is low, the temperature of the working battery itself becomes high, the charging efficiency becomes high, and the battery can be fully charged in a short time. For this reason, for example, when the battery is charged at night after working during the day, it is possible to perform efficient charging even when the outside temperature is low as in winter, and the next morning. Can be fully charged to the fully charged state.

[Brief description of drawings]

FIG. 1 is a schematic view showing a work vehicle equipped with a battery power unit.

FIG. 2 is a circuit diagram showing an example of a charging device for the battery power unit according to the present invention.

FIG. 3 is a circuit diagram showing a different example of the charging device for the battery power unit according to the present invention.

[Explanation of symbols]

 1 Working Battery 2 Battery Box 3 Electrothermal Heat Panel 5 Charger 6 Converter 7 Thermostat Switch 8a, 8b Charging Power Supply Line 9a, 9b Heating Power Supply Line

Claims (2)

[Scope of utility model registration request] 1. A charging device for a battery power unit, comprising: a battery-powered work device; and a work battery for supplying drive power to the work device, wherein power from a power supply corresponds to the work battery. A charger that converts the electric power having the charged voltage to the working battery to supply the working battery to charge the working battery; an electrothermal heat panel disposed in the vicinity of the working battery; and the charger. And a heating power supply line for supplying a part of the electric power from the power source to the electrothermal heating panel during the charging operation of, and when the outside air temperature is equal to or lower than a predetermined temperature. And an outside air temperature corresponding switch that is turned on to supply electric power from the power source to the electrothermal heat panel through the heating power supply line. The charging device of Tsu Teri power unit. 2. A part of the electric power from the power source after the heating power supply line is converted into a charging voltage corresponding to the working battery by the charger is supplied to the electrothermal heat panel. The charging device for a battery power unit according to claim 1, wherein: