Method of receiving charge, method of controlling charge, charge control unit and charging equipment

• US 9,168,841 B2
• Filed: 05/18/2011
• Issued: 10/27/2015
• Est. Priority Date: 05/19/2010
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Marui, Tomoyuki, Takahashi, Masami, Rissen, Kazumi, Ebara, Takafumi, Yonezawa, Kei, Nasu, Yoshihito, Kawai, Shoji
• Primary Examiner(s): Rodas, Richard Isla
• Assistant Examiner(s): DIBENEDETTO, MICHAEL N
• Application Number:
  US13/110,312
• Publication Number:
  US 20110285345A1
• Time in Patent Office: 1,623 Days
• Field of Search: 320/104, 320/109, 700/291, 700/295, 700/296, 701/22
• US Class Current: 1/1
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/31 Charging columns specially adapted for electric vehicles
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 53/63 in response to network capacity
• CPC Class Codes: B60L 53/66 Data transfer between charging stations and vehicles
• CPC Class Codes: B60L 53/67 Controlling two or more charging stations
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y04S 10/126 the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

Charging equipment and a charge control unit are provided, in which a plurality of devices mounted with battery can be simultaneously charged by the single charging equipment. Further, a method of controlling charge and a method of receiving charge are also provided. The charging equipment supplies electric power to the battery for charging, comprising a power output part which outputs DC power used for charging, a plurality of user operation units which can be connected with a vehicle equipped with a battery as a device mounted with battery, and the charge control unit which controls a power supply from the power output part to the user operation unit. Herein, the charge control unit distributes the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the vehicle.

Claims

1. A charge control unit included in charging equipment which charges a battery by supplying electric power thereto, the charging equipment comprising:

a power output part which outputs DC power used for charging, and which comprises a plurality of power conversion units;

a plurality of user operation units capable of being connected with a device mounted with the battery;

the charge control unit which controls a power supply from the power output part to the user operation unit; and

a switching circuit which changes a connecting combination between the power conversion units and the user operation units,

wherein the charge control unit is configured to distribute the electric power outputted from at least one of the power conversion units selected from the plurality of power conversion units via the switching circuit to supply the distributed power to the user operation unit connected with the device mounted with the battery, and

wherein the charge control unit is configured to acquire information on a time zone of peak electric power from the outside of the charging equipment, and to select the predetermined number of the charge conversion units in the order of a longer operation time from the plurality of power conversion units, so as to restrict the operation of the selected power conversion units during the time zone of the peak electric power.

2. The charge control unit described in claim 1, wherein the power output part is configured to convert electric power from a system to DC power used for charging and to output the DC power.

3. The charge control unit described in claim 1, wherein the charge control unit is configured to acquire a charge pattern set by a user at the user operation unit, and to distribute the electric power outputted from the power output part based on the charge pattern.

4. The charge control unit described in claim 3, wherein, when the charge control unit acquires the charge pattern, the charge control unit is configured to arrange distribution of the electric power outputted from the power output part based on the charge pattern already set.

5. The charge control unit described in claim 3, wherein the charge pattern contains a charge schedule which defines a charge end time of the battery, and the charge control unit is configured to distribute the electric power outputted from the power output part so that the charge schedule is satisfied.

6. The charge control unit described in claim 3, wherein the charge pattern contains a quick charge request which requests to immediately conduct the charge with a predetermined charge output capacity of the battery, and the charge control unit is configured to distribute the electric power outputted from the power output part so that the quick charge request is satisfied.

7. The charge control unit described in claim 3, wherein the charge pattern contains a charge rate or a charge amount of the battery, and the charge control unit is configured to distribute the electric power outputted from the power output part so that the charge rate or the charge amount is satisfied.

8. The charge control unit described in claim 1, wherein the charge control unit is configured to acquire a charge coefficient which represents a charge rate or an increase of a charge amount if the battery is charged by unit time with a unit charge output capacity, or information by which the charge coefficient is calculated, from the device mounted with battery through the user operation unit, so as to control the power distribution by using the charge coefficient.

9. The charge control unit described in claim 8, wherein the charge coefficient or the information by which the charge coefficient is calculated, is updated based on a result obtained by measuring a performance of the battery in the device mounted with battery.

10. Charging equipment comprising:

a power output part which outputs DC power used for charging and which comprises a plurality of power conversion units;

a plurality of user operation units capable of being connected with a device mounted with a battery;

a charge control unit which controls a power supply from the power output part to the user operation unit, to charge the battery by supplying electric power thereto, and

a switching circuit which changes a connecting combination between the power conversion units and the user operation units, wherein

the charge control unit is configured to distribute the electric power outputted from at least one of the power conversion units selected from the plurality of power conversion units via the switching circuit to supply the distributed power to the user operation unit connected with the device mounted with the battery, and

wherein the charge control unit is configured to acquire information on a time zone of peak electric power from the outside of the charging equipment, and to select the predetermined number of the charge conversion units in the order of a longer operation time from the plurality of power conversion units, so as to restrict the operation of the selected power conversion units during the time zone of the peak electric power.

11. A method of controlling charge which is executed by a charge control unit included in charging equipment:

the charging equipment comprising;

a power output part which outputs DC power used for charging and which comprises a plurality of power conversion units;

a plurality of user operation units capable of being connected with a device mounted with a battery;

a charge control unit which controls a power supply from the power output part to the user operation unit; and

a switching circuit which changes a connecting combination between the power conversion units and the user operation units,

wherein the charge control unit is configured to acquire information on a time zone of peak electric power from the outside of the charging equipment, and to select the predetermined number of the charge conversion units in the order of a longer operation time from the plurality of power conversion units, so as to restrict the operation of the selected power conversion units during the time zone of the peak electric power,

the method comprising the steps of;

changing a switching state of the switching circuit based on necessary electric energy information outputted from the device mounted with the battery;

distributing the electric power outputted from at least one of the power conversion units selected from the plurality of power conversion units via the switching circuit;

supplying the distributed power to the user operation unit connected with the device mounted with battery; and

charging the battery by supplying electric power thereto.

12. A method of receiving charge which is executed by a user operation unit included in charging equipment, the charge equipment comprising a power output part which outputs DC power used for charging, a plurality of user operation units capable of being connected with a device mounted with a battery;

and a charge control unit which controls a power supply from the power output part to the user operation unit, to charge the battery by supplying electric power thereto,

wherein the charge control unit is configured to distribute the electric power outputted from the power output part to supply the distributed power to the user operation unit connected with the device mounted with the battery, and

wherein the charge control unit is configured to acquire information on a time zone of peak electric power from the outside of the charging equipment, and to select the predetermined number of the charge conversion units in the order of a longer operation time from the plurality of power conversion units, so as to restrict the operation of the selected power conversion units during the time zone of the peak electric power,

the method executed by the user operation unit comprising steps of;

(a) displaying an acceptance screen on a display part comprising a timer charge acceptance part which accepts a charge schedule determining a charge end time of the battery and a quick charge acceptance part which accepts a quick charge request requesting an immediate execution of charging with a predetermined charge output capacity of the battery,

(b) receiving information on the charge schedule or the quick charge request on the acceptance screen,

(c) storing the information on the charge schedule or the quick charge request received in the step (b) in a storage part of the user operation unit, and

(d) transmitting the information on the charge schedule or the quick charge request stored in the storage part to the charge control unit.

13. The method of receiving charge described in claim 12, further comprising steps of:

(e) receiving information on a reply which responds to the charge schedule or the quick charge request from the charge control unit,

(f) storing the information on the reply which is received in the step (e) into the storage part, and

(g) displaying a message of the reply on the display part based on the information on the reply stored in the storage part.

14. The method of receiving charge described in claim 12 or claim 13, wherein the acceptance screen comprises a charge target acceptance part which accepts a value of a charge rate or a charge amount of the battery.

15. Charging equipment for connecting a device mounted with battery thereto;

the device being equipped with a battery, to charge the battery by supplying electric power to the battery,

the charging equipment comprising;

a plurality of power conversion units which convert electric power from a system to DC power and output the DC power,

a plurality of user operation units each of which has a charge cable connected with the device mounted with a battery,

a charge control unit which determines which power conversion unit is to be used from the plurality of the power conversion units, and based on the determination, connects the user operation unit with the power conversion unit, so as to control to start and stop a power supply from the power conversion unit to the user operation unit, for the user operation unit to be used by connecting the charge cable with the device mounted with the battery,

a fault detection means which detects a fault in the power conversion unit, and

a separation means which separates the power conversion unit with a fault from a state being used,

wherein the charge control unit is configured to acquire information on a time zone of peak electric power from the outside of the charging equipment, and to select the predetermined number of the charge conversion units in the order of a longer operation time from the plurality of power conversion units, so as to restrict the operation of the selected power conversion units during the time zone of the peak electric power.

16. The charging equipment described in claim 15,

wherein, when another device mounted with battery is to be charged during a time when one device mounted with the battery is being charged, the charge control unit is configured to allocate the power conversion unit that is not being used, to the device mounted with the battery to be charged as a power supply.

17. The charging equipment described in claim 15, wherein

the charging equipment comprises a necessary electric energy acquiring means which acquires necessary electric energy information from the device mounted with battery, as notice on electric power needed for charging, and

the charge control unit allocates the power conversion units based on the necessary electric energy information inputted from the device mounted with battery, before starting charge.

18. The charging equipment described in claim 15, wherein the charge control unit dynamically changes or rearranges a connecting combination between the power conversion unit and the user operation unit corresponding to the charge state at that time.

19. The charging equipment described in claim 15, comprising a charge amount acquiring means which acquires charge amount information on the battery from the device mounted with battery, when the battery is charged, wherein

the charge control unit changes allocation of the power conversion units corresponding to the charge amount of the battery.

20. The charging equipment described in claim 15, wherein

the charging equipment comprises a charge pattern input means by which a charge pattern requested by a user is manually set through the user operation unit, and

the charge control unit allocates the charge conversion units based on the charge pattern set by the user, before starting charge.