JP2010166794A - Charging stand system, charging method, and charging service providing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a charging stand system capable of easily introducing a charging stand into a space of a consumer regardless of the type of a power supply contract with an electric power company, and providing a new additional value, and to provide a charging method by the charging stand system, and a charging service providing method. <P>SOLUTION: The charging stand system has a power receiving device 100 for stepping down a high-voltage power fed from a high-voltage distribution line 2 to a low-voltage power for power supply, a load 230, and a charging equipment 300. The charging equipment 300 has a secondary battery 303, a DC/DC converter 304 to which a body to be charged is connected, a bidirectional inverter 302 structured to be capable of supplying the power fed from the power receiving device 100 to the secondary battery 303 or the DC/DC converter 304, and supplying the power fed from the secondary battery 303 to the load 230, and a control means CTR controlling the bidirectional inverter 302 and the DC/DC converter 304. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a charging stand system, a charging method, and a charging service providing method, and more particularly, to a charging stand system including a rechargeable battery that can be charged in a short time, a charging method using the charging stand system, and a charging service providing method.

  When the spread of electric vehicles, electric motorcycles and the like is considered, the problem is the provision of a charging stand. In general, a secondary battery mounted on an electric vehicle has still a low energy density, and the distance that can be traveled by one charge is limited to about 120 km.

  Conventionally, a parking lot, a large shopping center, a gas station, and the like have been considered as installation locations for charging stations. In a parking lot, it is assumed that charging takes a relatively long time (several hours). In shopping centers and gas stations, charging in a relatively short time is assumed.

  When charging in a short time, the electric power for the electric vehicle is usually several tens to 100 kW, and in general, it is necessary to be a high-voltage consumer with a large contract power amount at the installation location. become. In the future, when the characteristics of the secondary battery of the electric vehicle are improved, the charging time can be further shortened, and the charging power is further increased.

  If the charging stand is installed only in consideration of the above-mentioned conditions, the flexibility with respect to the installation location may be reduced. As a method of keeping the electric power charged to the electric vehicle as it is, for example, a secondary battery is mounted on a charging stand, and the secondary battery is charged slowly, and then from the secondary battery of the charging stand. It can be considered that a large amount of electric power is charged for the electric vehicle.

  For example, even if such a method is adopted, there are various restrictions to install a charging stand in a space of a low-voltage consumer where the amount of received power is less than 50 kW, such as a private store, a convenience store, or a small supermarket. .

  For example, when a charging stand is installed in the space of a low-voltage customer, it is necessary to change the contract power with the power company to a high-voltage contract even if the secondary battery is installed in the charging stand. It is necessary to newly install a high-voltage power receiving device for use and to secure a person responsible for managing the high-voltage power receiving device.

  Conventionally, without receiving the above-mentioned restrictions, it is possible to easily realize that a low-voltage consumer can receive high-voltage power supply without preparing a dedicated high-voltage power receiving device and accurately distribute the electricity charge of high-voltage power. A system and a power receiving method have been proposed (see Patent Document 1 and Patent Document 2).

JP 2005-237184 A JP 2007-174898 A

  According to the above power receiving system and power receiving method, it is not necessary to newly install a high voltage power receiving device for receiving power on the low voltage consumer side, and it is not necessary to appoint an administrator of the high voltage power receiving device on the low voltage consumer side. Therefore, by using the power receiving system described above, it is easy to introduce a charging stand in a space where a customer who charges an electric vehicle or the like stops even in a customer space where the power contract is a low voltage contract. .

  The present invention has been made in view of the above circumstances, and it is easy to introduce a charging stand in a customer's space regardless of the form of a power contract with an electric power company. It is an object of the present invention to provide a charging stand system, a charging method using the charging stand system, and a charging service providing method.

  A charging stand system according to a first aspect of the present invention is a charging stand system including a power receiving device that supplies a low-voltage power by stepping down high-voltage power supplied from a high-voltage distribution line, a load, and a charging device. The charging device supplies a secondary battery, a DC / DC converter to which an object to be charged is connected, power supplied from the power receiving device to the secondary battery or the DC / DC converter, and the secondary battery. A charging stand system comprising: a bidirectional inverter configured to be able to supply electric power supplied from a battery to the load; and a control means for controlling the bidirectional inverter and the DC / DC converter.

  The charging method according to the second aspect of the present invention includes a step of stepping down and outputting a high voltage power supplied from a high voltage distribution line by a power receiving device to a low voltage power, and a step of supplying the low voltage power output from the power receiving device to a load. And charging the secondary battery of the charging device according to the difference between the low-voltage power supplied from the power receiving device and the power used by the load, and when a charged object is connected to the charging device. A charging method comprising: a difference between power supplied from the power receiving device and power used by the load; and charging the object to be charged with power supplied from the secondary battery. is there.

  According to a third aspect of the present invention, there is provided a charging service providing method in which a business owner that owns a power receiving device and a charging device installs the charging device in a consumer's space and pays a space usage fee to the consumer, A charging service providing method for charging a low-voltage electric power to a load of the consumer by reducing a high-voltage power by a power receiving device, and the power used by the consumer is equal to or lower than the low-voltage power supplied from the power receiving device In the case of charging the secondary battery of the charging device according to the difference between the contracted power and the used power, and the charged object is connected to the charging device, the contracted power and the used power And a charging service providing method for charging the object to be charged with the power supplied from the secondary battery.

  According to the present invention, it is easy to introduce a charging stand in a customer's space regardless of the form of a power contract with an electric power company, and this charging stand system can provide new added value, and this charging stand system And a charging service providing method can be provided.

The figure showing roughly about the example of 1 composition of the charge stand system concerning one embodiment of the present invention. The figure for demonstrating an example of the charging service provision method by the charging stand system shown in FIG.

  Hereinafter, a charging stand system and a charging method according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the charging station system according to the present embodiment is between a 6600V high-voltage distribution line 2 that is a system related to an electric power company, and a customer 200 that includes loads 210 and 220 and a three-phase load 230. And a charging device 300 to which electric power is supplied from the power receiving device 100.

  In order to supply the received high voltage power to the customer 200, the power receiving apparatus 100 steps down the voltage to low voltage power and obtains a high voltage primary power measurement value and a low voltage secondary power measurement value. In other words, the power receiving device 100 is supplied with 6600 V of high-voltage power from the high-voltage distribution line 2 via the demarcation point switch 3.

  The high-voltage power supplied to the power receiving device 100 is measured by the high-voltage watt-hour meter 105 via the measurement voltage / current transformer (VCT) 104 and the operation lamp transformer via the load cutoff switch 106. Guided to (60 kVA) 107, the voltage is stepped down to lamp single phase 100V, 200V and power three-phase 200V.

  The single-phase lamps 100V and 200V are led to the 100V load 210 and the 200V load 220 in the consumer 200 by the cable 115 via the breaker 113 and the low-voltage watt-hour meter 114. The three-phase power 200V is led to the three-phase load 230 in the customer 200 and the charging device 300 by the cable 110 via the breaker 108 and the second low-voltage watt-hour meter 109.

  As shown in FIG. 1, the charging device 300 includes both a secondary battery 303, a DC / DC converter 304 to which an object to be charged is connected, and a power input unit 310 via a third low-voltage wattmeter 301. A direction inverter 302 is provided.

  The bidirectional inverter 302 is configured to be able to supply the power supplied from the power receiving device 100 to the secondary battery 303 or the DC / DC converter 304 and to supply the power supplied from the secondary battery 303 to the three-phase load 230. ing. Power is supplied to the DC / DC converter 304 from the bidirectional inverter 302 and the secondary battery 303.

  A switch SW2 is provided between the power input unit 310 and the bidirectional inverter 302 so that the power supply from the power receiving device 100 supplied via the cable 110 and the power input unit 310 to the bidirectional inverter 302 can be cut off. ing.

  The bidirectional inverter 302 has two terminals. One terminal (DC side) is connected to the secondary battery 303 via the switch SW3. The switch SW2 and the switch SW3 are controlled so as to connect the secondary battery 303 and the power receiving device 100 in a normal state.

  The secondary battery 303 includes, for example, a plurality of battery cells connected in series. The secondary battery 303 can be charged and discharged rapidly. For example, charging and / or discharging can be completed in about 5 minutes after starting charging or discharging.

  The other terminal (AC side) of the bidirectional inverter 302 is connected to the three-phase load 230 of the customer 200 via the changeover switch SW1. In the following description, the changeover switch SW1 is controlled so as to connect the three-phase load 230 and the cable 110 in a normal state.

  The charging apparatus 300 includes, for example, a charging connector (not shown) as connection means to which an electric vehicle as a charged object is connected. The bidirectional inverter 302 and the DC / DC converter 304 are controlled by the controller CTR, and the DC / DC converter 304 uses the power supplied from the bidirectional inverter 302 and the secondary battery 303 as a secondary mounted on the object to be charged. It converts according to the specification of a battery, and outputs it to a to-be-charged body through a connector for charge.

  The charging device 300 includes a third low-voltage watt-hour meter 301 for measuring the amount of power supplied from the power receiving device 100 to the charging device 300 via the cable 110. Therefore, the amount of power supplied from the power receiving apparatus 100 to the three-phase load 230 is equal to the measured value of the second low-voltage watt-hour meter 109 that measures the amount of power output from the power receiving apparatus 100 via the cable 110, and the third low level. It can be calculated from the difference from the measured value of the piezoelectric power meter 301.

  The operations of the third low-voltage watt-hour meter 301, the bidirectional inverter 302, the DC / DC converter 304, the switches SW2 and SW3, and the changeover switch SW1 are controlled by a controller CTR provided in the charging apparatus 300.

  In the above charging stand system, when a charging service is performed, a business owner who owns the power receiving device 100 and the charging device 300 installs the charging device 300 in the space 240 of the consumer 200 and is charged by the charging device 300. Provide a charging service to charge the body. The business operator pays a usage fee for the space 240 to the customer 200.

  At this time, first, the high-voltage power is stepped down by the power receiving device 100, and the low-voltage power is supplied to the three-phase load 230 of the consumer 200 according to the contracted power of the consumer 200. When it is equal to or lower than the low voltage power supplied from the power receiving device 100 of the house 200 (contract power of the customer 200), charging is performed based on the difference between the low voltage power supplied from the power receiving device 100 and the power used by the three-phase load 230. The secondary battery 303 of the device 300 is charged.

  That is, the three-phase load 230 and the cable 110 are connected by the changeover switch SW1. Further, the switch SW2 and the switch SW3 are turned on, and the cable 110 and the secondary battery 303 of the charging device 300 are connected via the bidirectional inverter 302.

  For example, when the contract power amount supplied from the power receiving apparatus 100 to the customer 200 is Akw and the power usage amount at the consumer 200 is Bkw, the power usage amount at the consumer 200 is equal to or less than the contract power amount. In some cases, the secondary battery 303 is charged at (AB) kw.

  When the charging target is connected to the charging device 300, the charging target is charged with the difference between the contract power and the used power of the consumer 200 and the power supplied from the secondary battery 303. That is, when, for example, an electric vehicle is connected to the charging connector as an object to be charged, the power for (A−B) kw via the bidirectional inverter 302 and the power stored in the secondary battery 303 are DC. The secondary battery mounted on the electric vehicle is charged via the / DC converter 304.

  Note that the controller CTR can also control the power to be supplied from only the secondary battery 303 to the body to be charged by turning off the switch SW2 and / or the switch SW3.

  Here, since the secondary battery 303 according to the present embodiment includes battery cells that can be charged and discharged rapidly, the time required to charge the secondary battery 303 can be shortened. If the time until charging is completed is shortened, it becomes possible to provide a charging service to more customers (charging service users).

  Furthermore, if the time required to complete the charging time of the secondary battery mounted on the object to be charged can be shortened, the staying time in the customer's customer 200 is short like a convenience store, and the customer Even when the vehicle is stopped for a short time, the charging can be completed by using the time when the customer leaves the vehicle.

  A customer who uses the charging service pays a service usage fee to the business owner who owns the charging device 300. This service usage fee may be a fee corresponding to the amount of power charged, a fee corresponding to the time required for charging (service usage time), or a fixed fee. Further, the service usage fee may be paid to the business operator via the customer 200.

  In the charging stand system according to the above-described embodiment, when the customer pays the service usage fee, the service usage fee may be paid together at the time of payment within the customer 200, for example. For example, a mechanism for locking an electric vehicle or the like in the parking space of the customer 200 is provided, and when the customer stops the electric vehicle or the like in the parking space and connects it to the charging connector, the electric vehicle or the like is locked in the parking space and parked. A parking ticket or the like on which a space number or the like is written is provided to the user.

  At this time, the charging of the secondary battery mounted on the electric vehicle or the like is started, and whether or not the charging is completed and the charging information such as the service usage fee is sent to the server computer or the like that manages the settlement machine in the customer 200 Supplied.

  Then, the customer presents the parking ticket or the like at the time of payment in the customer 200, and acquires the charging information corresponding to the parking space number from the charging device 300 by the payment machine in the customer 200, thereby Checkout is possible. In this case, when the settlement of the service usage fee is completed, information indicating that the settlement has been completed is provided from the settlement device to the charging device 300, the parking space is unlocked, and the charging service is completed.

  In addition, for example, charging is started when a customer connects a charging connector to an electric vehicle or the like, and a charge is input to the charging device 300, and the secondary power is mounted on the electric vehicle or the like according to the input charge. The battery may be charged. Also, payment of service usage fees is not limited to cash. For example, payment by credit card or electronic money may be used.

  Further, for example, when the charging device 300 and the business server computer are connected to be communicable by wire or wireless, customer information (registration ID, credit card information) is stored in advance in a database in the business server computer. , Billing destination information, etc.) is registered, and a registration ID or the like is input to the charging apparatus 300, so that the service usage fee may be automatically charged based on the customer information.

  Further, a prepaid medium such as a prepaid card for a charging service may be sold at the customer 200 or the like, and the customer can use the charging service by using the medium.

  Furthermore, in the charging stand system according to the present embodiment, since the secondary battery 303 and the cable 110 of the power receiving device 100 are connected via the bidirectional inverter 302, the amount of power used by the customer 200 is constant. When exceeding (for example, contract power amount Akw), electric power is supplied from the secondary battery 303 to the three-phase load 230 of the customer 200 via the bidirectional inverter 302.

  Therefore, the consumer 200 can cover the excess amount of power with the power supplied from the secondary battery 303 even when the amount of power used exceeds the contracted power amount Akw.

  Furthermore, the controller CTR includes a determination unit that determines whether or not the power supply from the power receiving apparatus 100 to the customer 200 is stopped. When the power supply is stopped, the controller CTR uses the changeover switch SW1 to change the three-phase load of the customer 200. 230 and the charging device 300 are connected, and the charging device 300 is disconnected from the power receiving device 100 by the switch SW2, and power is supplied from the secondary battery 303 to the three-phase load 230 via the bidirectional inverter 302. Here, when it is determined that the power supply is stopped, the so-called instantaneous stop in which the power supply is instantaneously stopped is not included.

  Thus, by controlling the changeover switch SW1, the switch SW2, and the switch SW3, it is possible to supply power to the customer 200 using the charging device 300 in an emergency. Thus, for example, even when there are refrigerated goods and frozen goods in the customer 200, the quality and the reliability of the goods can be ensured without deteriorating the quality of the goods.

  That is, as shown in FIG. 2, the consumer 200 provides a space 240 for installing the charging device 300 to a business owner that owns the power receiving device 100 and the charging device 300 and pays a power usage fee. As a result, the consumer 200 can obtain a space usage fee from the business operator and can expect the ability to attract customers through the charging service as an added value. Furthermore, the customer 200 can change the power contract from the low-voltage contract to the high-voltage contract, and can ensure the safety in the event of a power failure and can use the power without being bound by the contract power.

  In the present embodiment, the electricity bill paid by the customer 200 to the electric power company is calculated based on the integrated electric energy measured by the high-voltage watt-hour meter 105 by calculation means (not shown) or manual measurement, and is calculated from the electric power company. It is charged to the operator from the consumer 200 or the electric power company.

  When an electricity charge is charged from an electric power company to an operator, the operator pays the electricity charges of a plurality of consumers 200 that provide a charging service at a time, and the customer 200 pays the electric charges as a service fee to the operator. pay.

  Moreover, the electricity bill in the low voltage power reception before the change to the high voltage power reception can be calculated based on the integrated electric energy measured by the low voltage electricity meters 109, 114, and 301. When a new high-voltage power reception is started, the electricity bill to be paid if the low-voltage power reception has been performed can also be calculated based on the integrated electric energy measured by the low-voltage watt-hour meters 109, 114, and 301. .

  In general, the low-voltage power contract is divided into a metered-light lamp contract corresponding to single-phase 100V and 200V, and a low-voltage power contract corresponding to three-phase 200V. The high-voltage power contract is a high-voltage power or business power contract, a business-specific seasonal power contract, a business holiday high-load power contract, etc. Or, it is connected between the electric power company and the operator. In the case shown in FIG. 1, a case where a high-voltage power contract is made between an electric power company and an operator is shown.

  The difference between the electricity charge due to low-voltage power reception and the electricity charge due to high-voltage power reception can be calculated by the following equation (1).

Electricity price difference = (metered-light basic charge (yen / kW) x metered-light contract power (kW) + metered-light metered charge (yen / kWh) x metered-light usage (kWh) + low-voltage power basic charge (yen / kW) × Low-voltage power contract power (kW) + Low-voltage power usage fee (yen / kWh) x Low-voltage power consumption (kWh))-(Business power basic charge (yen / kW) x Commercial power contract power (kW) + Business Electricity usage fee (yen / kWh) x commercial power consumption (kWh)) (1)
Here, high voltage power has been described using a commercial power contract, but the same can be calculated for other contracts.

  In general, compared with a low-voltage power contract, a high-voltage power contract has a lower basic charge but a lower metered charge. The contract power is determined by the breaker that covers the maximum power demand (demand) used by the consumer, whereas the contract power is determined by the average value of the maximum power demand for 30 minutes. It is done. For this reason, even in the same maximum power demand, the contract power tends to be lower for high voltage power than for low voltage power. Furthermore, due to the low usage rate, the electricity rate is lower in the case of high voltage power reception than in the low voltage power reception.

  The difference between the low-voltage receiving electricity charge and the high-voltage receiving electricity charge is, for example, the merit of the customer 200, the power receiving device 100 and the charging device 300, and providing the customer 200 with a service and a charging service that enable high voltage power receiving. It is used for the service charge of the operator.

  The service charge to the business operator is the principal and interest payment for the borrowing for the initial cost of the power receiving device 100 and the charging device 300 paid by the business operator, the maintenance cost of the power receiving device 100 and the charging device 300, the personnel cost of the business operator, various expenses, Provided for taxes, business profits, etc.

  As shown in FIG. 2, the business owner owns the power receiving device 100 and the charging device 300, and provides the customer 200 with a high-voltage power receiving service and a charging service for a plurality of years, thereby initial costs of the power receiving device 100 and the charging device 300. It is possible to continue to provide benefits to the consumer 200.

  Further, the customer 200 can receive high-voltage power, can obtain a usage fee for the charging service space 240 from the business operator, and can expect to attract customers through the charging service.

  As described above, according to the present embodiment, the consumer 200 can enjoy the advantages of high-voltage power reception without owning the power receiving device 100 and the charging device 300, and the space usage fee and charging due to the installation of the charging device 300. Value added by services can be obtained. Further, the business operator can receive the business profit from the service fee based on the difference between the low-voltage receiving electricity fee and the high-voltage receiving electricity fee and the charging service usage fee from the customer.

  That is, according to the charging device and the charging stand system according to the present embodiment, when an electric vehicle becomes widespread, there is a high possibility that the electric vehicle will stand by the electric vehicle. It is possible to provide a charging stand system that is easy to introduce a charging stand (a high-voltage power receiving device and a charging stand are installed and operated by a service provider) and can provide new added value to consumers.

  In other words, the new added value means that when the power system supplies the power of the secondary battery of the charging station in the event of a power failure and consumes power exceeding the contracted power, the secondary battery of the charging station is used as the excess power. Is to supply power.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In the above-described embodiment, the example in which the moving lamp transformer 107 is used as the transformer for performing the step-down from the high pressure to the low pressure has been described. However, the same effect can be obtained by using the lamp transformer and the power transformer separately. .

  Moreover, in the said embodiment, although the case where the secondary battery mounted in the electric vehicle etc. as a to-be-charged body was charged was described, if the to-be-charged body is a device in which the secondary battery is mounted, the electric vehicle etc. Not limited. For example, even when the charging stand system charges a mobile communication device or a music playback device equipped with a secondary battery while staying at the customer 200, the same effect as in the case of this embodiment can be obtained. .

  In addition, if the consumer 200 is a consumer whose power supply from an electric power company is limited only to the low voltage supply of 100V or 200V, such as a private store, a convenience store, a small supermarket, a small factory, etc., it will be described in the above embodiment. The same effects as those of the charging device and the charging method can be obtained.

  Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

  CTR: Controller, 2 ... High-voltage distribution line, 100 ... Power receiving device, 200 ... Consumer, 230 ... Three-phase load, 300 ... Charging device, 302 ... Bidirectional inverter, 303 ... Secondary battery, 304 ... DC / DC converter

Claims (8)

A charging stand system including a power receiving device that supplies a high-voltage power supplied from a high-voltage distribution line by stepping down to a low-voltage power, a load, and a charging device,
The charging device includes a secondary battery,
A DC / DC converter to which a charged object is connected;
A bidirectional inverter configured to supply the power supplied from the power receiving device to the secondary battery or the DC / DC converter, and to supply the power supplied from the secondary battery to the load;
A charging stand system comprising: the bidirectional inverter; and a control means for controlling the DC / DC converter. A first switch for switching so that power is supplied to the load from at least one of the power receiving device and the charging device;
A second switch disposed between the bidirectional inverter and the power receiving device;
2. The charging stand system according to claim 1, wherein the control unit controls and switches the first switch and the second switch. Stepping down and outputting the high voltage power supplied from the high voltage distribution line to the low voltage power by the power receiving device;
Supplying low voltage power output from the power receiving device to a load;
Charging the secondary battery of the charging device according to the difference between the low-voltage power supplied from the power receiving device and the power used by the load;
When it is detected that an object to be charged is connected to the charging device, the difference between the power supplied from the power receiving device and the power used by the load, and the power supplied from the secondary battery Charging the object to be charged by the charging method. A first detection step of detecting whether power supply from the power receiving device is stopped;
The charging method according to claim 3, further comprising: supplying power from the secondary battery to the load when it is detected in the first detection step that power supply is stopped. A second detection step of detecting whether or not the power consumption of the load is a certain value or more;
A step of supplying the amount of power exceeding the fixed value from the secondary battery to the load when it is detected in the second detecting step that the power consumption exceeds a fixed value. The charging method according to claim 3 or claim 4. A company that owns a power receiving device and a charging device installs the charging device in a consumer's space and charges the object to be charged by the charging device.
The power receiving device steps down the high voltage power to supply the low voltage power to the load of the consumer,
When the power used by the consumer is less than or equal to the low voltage power supplied from the power receiving device, the secondary battery of the charging device is charged by the difference between the low voltage power supplied from the power receiving device and the power used And
When it is detected that the charging target is connected to the charging device, the charging target is determined by the difference between the low-voltage power supplied from the power receiving device and the power used, and the power supplied from the secondary battery. A charging service providing method for charging a charging body.   The charging service providing method according to claim 6, wherein power is supplied from the secondary battery to a load in the consumer when power supply from the power receiving apparatus to the consumer is stopped.   8. The power supply unit according to claim 6, wherein, when the power used by the consumer exceeds a certain value, the power exceeding the certain value is supplied from the secondary battery to a load in the consumer. Charging service provision method.

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