Vehicular charge/discharge system

• US 10,569,659 B2
• Filed: 10/27/2015
• Issued: 02/25/2020
• Est. Priority Date: 10/28/2014
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Tsuno, Koichi
• Primary Examiner(s): Isla, Richard
• Assistant Examiner(s): Dibenedetto, Michael N
• Application Number:
  US14/923,556
• Publication Number:
  US 20160114693A1
• Time in Patent Office: 1,582 Days
• Field of Search: 320103, 320104, 320109, 307 101, 307 107, 180 651, 180 6521, 180 6529, 700 22, 701 22, 702 60, 702 61, 702 63- 65, 903903, 903907
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/20 characterised by converters located in the vehicle
• CPC Class Codes: B60L 53/30 Constructional details of charging stations
• CPC Class Codes: B60L 53/51 Photovoltaic means
• CPC Class Codes: B60L 53/60 Monitoring or controlling charging stations
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries
• CPC Class Codes: H02J 7/0047 with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• 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

In a charge/discharge system having a battery mounted in an electric vehicle, a charging station that charges the battery, and a connector that connects the battery of the electric vehicle and the charging station through a power line, there are provided a detector that applies a voltage to a terminal connected to the power line of the connector and detects whether the connector connects the battery and the charging station based on change of the applied voltage, and a controller that controls charge/discharge of the battery through the connector based on the state of charge of the battery memorized in a memory when it is detected that the connector connects the battery and the charging station.

Claims

1. A charge/discharge system having a battery mounted in an electric vehicle, a charging station that charges the battery, and a connector that connects the battery of the electric vehicle and the charging station through a power line, comprising:

a detection circuit formed on a power line of the connector on the side of the charging station independently from the electric vehicle when the battery of the electric vehicle and the charging station are disconnected, the detection circuit having a PNP transistor circuit connected to a power source and a voltage detection circuit including;

a first resistor connected to the PNP transistor circuit;

a diode connected to the first resistor;

a second resistor connected to the diode; and

a third resistor connected to the second resistor and grounded, the detection circuit being formed on the power line between the diode and the second resistor;

a detector that applies a voltage from the power source to a terminal of the PNP transistor circuit of the detection circuit and detects whether the connector connects the battery and the charging station based on change of the applied voltage output from the detection circuit between the second resistor and the third resistor;

a memory that stores a state of charge of the battery; and

a controller that controls charge/discharge of the battery through the connector based on the state of charge of the battery stored in the memory when it is detected that the connector connects the battery and the charging station,

wherein the vehicle is installed with a vehicle controller that detects a state of charge of the battery, and the controller applies voltage to the vehicle to operate the vehicle controller when it is detected that the connector connects the battery and the charging station.

2. The charge/discharge system according to claim 1, wherein the detector applies the voltage of a level that does not operate a vehicle controller installed in the vehicle.

3. The charge/discharge system according to claim 2, wherein the PNP transistor circuit has a base terminal forming the terminal, and the voltage detection circuit produces an output indicating whether the connector connects the battery and the charging station.

4. The charge/discharge system according to claim 1, wherein the detector stops applying the voltage to the terminal when a vehicle controller is operated by the controller, while continues applying the voltage to the terminal when the vehicle controller is not operated by the controller.

5. The charge/discharge system according to claim 1, further including:

a commercial power supply that supplies power to a feed line;

a photovoltaic power generation unit that generates power through photovoltaic power generation and supplies the generated power to the feed line; and

an electrical load connected to the feed line;

wherein the controller controls to connect the feed line to the charging station in response to power situation.

6. The charge/discharge system according to claim 5, wherein the controller controls to connect the feed line to the charging station such that the power discharged from the battery is supplied to the electrical load.

7. The charge/discharge system according to claim 5, wherein the controller controls to connect the feed line to the charging station such that the battery is supplied with the power generated by the photovoltaic power generation unit.