JPH05276681A - Charger - Google Patents

Abstract

PURPOSE:To simply and accurately grasp a charging amount by calculating- displaying the amount of a storage battery and to easily deliver a tariff from a charging facility supplier to a user by calculating-displaying a charging tariff with electric power as a reference. CONSTITUTION:In the case of charging, output current and voltage of a rectifier 7 are respectively detected by a current detector 10 and a voltage detector 11. A charging amount is obtained from a detected current by a multiplier 13, and the charging amount of a storage battery 4 is obtained by an integrator 14. Further, electric power is obtained from the charging amount and the detected voltage by a multiplier 15, electric power required for charging is obtained by an integrator 16, and the power is converted to charging tariff by a tariff converter 17. The charging amount and tariff of the battery 4 are displayed on a display unit 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging a storage battery mounted on, for example, an electric vehicle.

[0002]

2. Description of the Related Art An electric vehicle has a motor as a prime mover and a secondary battery (storage battery) as a power source of the motor. Therefore, unlike an internal combustion engine vehicle, it is necessary to charge the installed storage battery instead of refueling gasoline or the like. In order to popularize electric vehicles, it is important to strengthen maintenance. For example, it is necessary to install a charging facility for storage batteries on public roads and establish a system that can charge the storage batteries in a short time with this charging facility. From this point of view, improvements and research on charging devices and rapid charging systems are currently underway.

FIG. 2 schematically shows a conventional charging device for an electric vehicle. Reference numeral 1 is a charging device, and 2 is an electric vehicle. The charging cable 3 is connected to the output terminals A and B of the charging device 1.
Are connected. Connect this charging cable 3 to an electric vehicle 2
The storage battery 4 mounted on the electric vehicle 2 is charged by connecting to the input terminals A'and B'of.

In the charging device 1, AC power is taken from the AC power source 5 through the circuit breakers 6 and 6, converted into DC by the rectifier 7, and output terminals A and B through the switch contacts 8 and 8.
Output to. The control device 9 controls the rectifier 7 and other main controls of the charging device. The current detector 10 and the voltage detector 11 detect the output current and the output voltage of the rectifier 7, and the controller 9 based on the output current and the output voltage.
Controls the rectifier 7 to perform charging by a predetermined charging method.

[0005]

As described above, in order to establish a system in which electric vehicles can be charged freely on public roads, it is necessary to prepare charging equipment capable of charging unspecified vehicles.

In the present situation where electric vehicles are not widely used, the charging equipment was usually installed by the owner of the electric vehicle. For this reason, it suffices if the charging device can charge the specific vehicle owned by the charging device. However, when charging an unspecified vehicle, the charging facility side and the beneficiary are not the same, so a function related to toll collection etc. is required. Conventionally, in the field of electric vehicles,
As described in No. 157532, although a storage battery remaining charge / charging meter is provided, this function is provided with a meter for switching and displaying the terminal voltage or charging voltage of the storage battery on the electric vehicle side. Therefore, it was not suitable for application to grasping the amount of electricity and charging fee on the charging device side.

[0007] In view of such circumstances, an object of the present invention is to provide a charging device suitable for charging for a fee.

[0008]

In order to achieve the above object, the present invention comprises a direct current converter for converting the electric power supplied from a power source into direct current, and the output of the direct current converter is fed to the side to be charged. An apparatus for charging a storage battery on the side to be charged by outputting is provided with the following means.

(1) A current detector and a voltage detector for detecting the output current and output voltage of the DC converter.

(2) A charge amount calculation unit for obtaining the charge amount from the output current.

(3) A power amount calculation unit for obtaining a power amount from the charge amount and the output voltage.

(4) A charge rate calculation unit for multiplying the amount of electric power by a conversion factor to obtain a charge rate.

(5) A display unit for displaying the charge amount and charge charge.

(6) A display unit for displaying the current conversion factor as a unit price of electric power.

(7) A distant control setting unit for changing the setting of the conversion coefficient and the like from a distance.

[0016]

According to the present invention, the output current and the output voltage are measured by the current detection unit and the voltage detection unit, and the charge amount calculation unit and the power amount calculation unit use the measured values to obtain the charge amount and the power amount. Then, the charging fee is calculated based on the electric energy. That is, the charge rate calculation unit multiplies the power amount by the conversion factor to obtain the charge rate. This conversion coefficient may be set appropriately in advance. The charge amount, charge charge, and conversion coefficient (electric power unit price) thus obtained are output to the outside by the display unit. The conversion factor is determined by remote monitoring control depending on the power demand (summer / winter, daytime / nighttime, etc.), and when the power supply capacity is low, the use of the charger can be restricted or stopped.

[0017]

Embodiments of the present invention will be described below.

FIG. 1 shows an outline of a charging device according to an embodiment of the present invention. In the figure, parts that are the same as or correspond to those of the related art are assigned the same reference numerals and explanations thereof are omitted. 12
Is a clock. The multiplier 13 multiplies the output current of the rectifier 7 and the time to obtain the charge amount. Integrator 14
Is to integrate (integrate) the output of the multiplier 13.
The multiplier 15 multiplies the output of the multiplier 12 by the detection voltage to obtain the amount of electric power. The integrator 16 integrates the output of the multiplier 15. The charge conversion unit 17 converts the amount of power into a charge amount by multiplying the amount of power by a conversion coefficient. The conversion coefficient setting device 18 is a device for setting the conversion coefficient, and holds the set conversion coefficient and outputs it to the charge conversion unit 17. The conversion coefficient can be set arbitrarily. For example, it is possible to set a plurality of conversion coefficients and switch the conversion coefficient to be used. As a result, it is possible to lower the charging fee at midnight in accordance with the late-night discount rate of the power rate.

The distant control setting section 18A operates a coefficient change of the conversion coefficient setting section 18 and a stop command of the charging device according to the demand situation of electric power by a distant control by radio or the like. If a large number of quick charging devices operate at the same time during peak power demand, the power system may overload and cause a system failure. The configuration cannot be performed.

The display device 19 displays the charge amount and charge charge. The cash collection device 20 is a device provided with a function of identifying input coins and other functions relating to cash collection. It is advantageous if the cash collecting apparatus 20 is provided with a function of handling not only coins and bills but also magnetic cards and the like. In this embodiment, the cash collecting apparatus 20 is provided with a function of comparing the collected amount of money and the charge amount and turning on the contact 21A when the charge amount reaches the collected amount. The controller unit 21 controls driving of the rectifier 7, and a procedure for driving / stopping the rectifier 7 according to ON / OFF of the contact 21A is set.

The charge unit price display device 22 displays the current charge unit price, and displays the unit price according to the coefficient set by the conversion coefficient setting unit 18. When the power supply capacity of the power system is small, increasing the charging unit price has the effect of suppressing the amount of power used.

Next, the operation of this device will be described. When charging, the rectifier 7 starts operating under the control of the controller unit 21 to perform rectification. The DC output of the rectifier 7 is supplied to the storage battery 4 to charge the storage battery 4. At this time, the charge amount and the like are calculated based on the output current and the output voltage detected by the current detector 10 and the voltage detector 11. That is, the multiplier 13 obtains the charge amount from the detected current, and the integrator 14 obtains the charge amount of the storage battery 4. Further, the multiplier 15 determines the amount of power from the charged amount and the detected voltage, the integrator 16 determines the amount of power required for charging, and the charge conversion unit 17 converts this amount of power into a charging charge. The charge amount and charge of the storage battery 4 are displayed on the display device 19.

Usually, a mode is conceivable in which the charge is given and received based on the charge charge displayed on the display device 19 at the time of completion of the charge, but charge by advance payment is also possible. In this case, the user of the charging device 1 uses the cash collecting device 20.
Therefore, put an arbitrary amount of money before starting charging. When the cash collection device 20 confirms that the charge has been input, the contact point 21A is turned on.
And start charging. When the charging fee reaches the charging amount, the contact 21A is turned off to end the charging.
As a result, the user can receive only the desired amount of charge.

[0024]

As described above, according to the present invention, the charge amount and charge charge of the storage battery are calculated and displayed from the output current and output voltage of the DC converter. In addition, the charging unit price is displayed even before charging. Therefore, you can easily check the charge amount, easily and accurately collect the charge between the charging facility provider and the user based on the displayed amount, and set the charge unit price high when the power system has no margin. Then, by displaying it to the user, the effect of suppressing the power consumption at the same time can be expected. Therefore, if the present invention is applied to a charging device for an electric vehicle, it is considered to promote the spread of charging equipment for unspecified vehicles and contribute to the establishment of a system for charging an electric vehicle on a public road.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a charging device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an outline of a conventional charging device.

[Explanation of symbols]

 4 ... Storage battery 5 ... AC power supply 7 ... Rectifier 10 ... Current detector 11 ... Voltage detector 13, 15 ... Multiplier 14, 16 ... Integrator 17 ... Charge converter 18A ... Conversion coefficient setting unit 19 ... Display device 22 ... Charging Unit price display

Front Page Continuation (72) Inventor Taiji Shibuya 2-17 Osaki, Shinagawa-ku, Tokyo Stock company Shameidensha (72) Inventor Hideaki Horie 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd.

Claims (3)

[Claims] 1. An apparatus for charging a storage battery on the charged side by providing a DC converter for converting electric power supplied from a power source to DC, and outputting the output of the DC converter to the charged side, wherein the DC A current detection unit and a voltage detection unit that detect the output current and output voltage of the converter, a charge amount calculation unit that determines the charge amount from the output current, a power amount calculation unit that determines the power amount from the charge amount and output voltage, and power. A charging device comprising: a charge charge calculation unit that multiplies an amount by a conversion coefficient to obtain a charge charge; and a display unit that displays a charge amount and a charge charge. 2. The charging device according to claim 1, further comprising a display unit for displaying a unit price of charge corresponding to the conversion coefficient before starting charging. 3. The charging device according to claim 1, wherein the conversion coefficient can be changed and the charging operation can be stopped by remote monitoring control such as wireless control.