JP6339482B2 - Charging system, electric vehicle, and charger - Google Patents

Description

  The present invention relates to a charging system for charging an electric vehicle.

  An electric vehicle that obtains power by driving a motor using electric power charged in a secondary battery (battery), or a plug-in hybrid vehicle (PHV: Plug-in) that uses an engine and a motor together to charge the battery from the outside Hybrid Vehicle) has been put on the market. Hereinafter, both electric vehicles and plug-in hybrid vehicles are referred to as electric vehicles.

  With the spread of electric vehicles, the number of dedicated charging facilities (hereinafter referred to as “charging stations”) for charging batteries mounted on electric vehicles with chargers is also increasing. Charging method includes starting charging after confirming connection between electric vehicle and charger, and starting charging after communication between electric vehicle and charger in addition to confirming connection There is a method to do.

  When establishing communication between the electric vehicle and the charger, it was connected to the charger by performing a procedure (Signal Level Attenuation Characterization (SLAC)) that identifies the electric vehicle. A technique for identifying an electric vehicle is known (see, for example, Non-Patent Document 1).

ISO 15118-3 “Wired physical & data link layer requirement”

  As charging stations that support SLAC processing are introduced to the market, it is assumed that those that do not support SLAC processing and those that support SLAC processing coexist. When an electric vehicle that supports SLAC processing is connected to a charging station that does not support SLAC processing, SLAC processing cannot be performed between the electric vehicle and the charging station. In this case, the electric vehicle charges with a charging station after confirming the connection with the control pilot signal according to the charging session controlled only by IEC61851 with the charging station, so-called low-level charging ( Basic charging) must be performed.

  Even if SLAC processing cannot be performed between the electric vehicle and the charging station, so-called high-level communication (HLC (High Level Communication)) is performed between the electric vehicle and the charging station according to the charging session controlled by ISO15118. Level Communication)) is preferable. Rapid charging with large capacity in a short period of time provides safe and reliable current control, so the charging station and the electric vehicle perform high-level communication to exchange information in real time and with high reliability This is necessary.

  An object of the present invention is to perform high-level communication between an electric vehicle and a charger even when the electric vehicle cannot perform a procedural process for specifying a charger.

A charging system according to an embodiment of the disclosure includes:
A charging system having a charger and an electric vehicle charged by electric power fed from the charger,
Electric cars
A first signal processing unit for confirming connection with the charger based on a control pilot signal transmitted by the charger connected to the electric vehicle;
A second signal for performing signal processing for signal level attenuation characterization processing, which is a procedure for specifying the charger connected to the electric vehicle after connection confirmation is performed by the first signal processing unit. A processing unit;
A third signal processing unit that performs signal processing for high-level communication regarding charging between the charger connected to the electric vehicle;
If the signal level attenuation characterization process cannot be performed with the charger by the second signal processing unit, the signal level attenuation characterization process is skipped, and the third signal processing unit And a first communication control unit that controls to perform signal processing for the high-level communication,
The charger is
A fourth signal processing unit for confirming connection with the electric vehicle by transmitting the control pilot signal to the electric vehicle;
A fifth signal processing unit for performing signal processing for high-level communication regarding charging with the electric vehicle;
When the signal level attenuation characterization process cannot be performed with the charger by the second signal processing unit, and the signal processing for the high level communication is performed by the third signal processing unit. And a second communication control unit that controls the fifth signal processing unit to perform signal processing for the high-level communication when the control is performed.

  According to the disclosed embodiment, high-level communication can be performed between the electric vehicle and the charger even when the electric vehicle cannot perform the procedure for specifying the charger.

It is a figure which shows one Example of a charging system. It is a functional block diagram which shows one Example of a charger. It is a functional block diagram which shows one Example of an electric vehicle. It is a flowchart which shows one Example of operation | movement of a charger. It is a flowchart which shows one Example of operation | movement of an electric vehicle. It is a flowchart which shows an example of HLC. It is a flowchart which shows one Example of operation | movement of an electric vehicle. It is a flowchart which shows one Example of operation | movement of an electric vehicle. It is a flowchart which shows one Example of operation | movement of an electric vehicle. It is a figure which shows the modification of a charging system. It is a figure which shows one modification of a charger. It is a functional block diagram which shows the modification of a charger. It is a flowchart which shows one Example of operation | movement of a charger. It is a flowchart which shows one Example of operation | movement of an electric vehicle.

Next, the form for implementing this invention is demonstrated, referring drawings based on the following Examples. Examples described below are merely examples, and embodiments to which the present invention is applied are not limited to the following examples.
In all the drawings for explaining the embodiments, the same reference numerals are used for those having the same function, and repeated explanation is omitted.

<Example>
<Charging system>
FIG. 1 shows an embodiment of a charging system for charging a battery mounted on an electric automobile. The charging system includes a charger 100 that supplies power to an electric vehicle and the like, and an electric vehicle 200 that travels using electricity as an energy source and the motor as a power source. FIG. 1 mainly shows the hardware configuration of the charger 100 and the electric vehicle 200.

  The charger 100 can be installed in a ground-installed charging device or charging facility used for charging a vehicle such as an electric automobile or an electric motorcycle. In this case, the charging device or charging facility in which the charger 100 is installed can be called a charging station or a charging spot. Further, the charger 100 can perform high-level communication (hereinafter referred to as “HLC”) in accordance with the provisions of ISO15118-2, but for signal level attenuation characterization (hereinafter referred to as “SLAC”) processing. Not supported.

  In the SLAC process, a SLAC request or the like is transmitted from the electric vehicle, and a procedure for specifying a connection partner is performed on the SLAC request based on a response signal or the like transmitted from the charger. SLAC is included in HPGP (HomePlug Green PHY) and is defined in ISO15118-3.

  ISO15118-2 defines a communication protocol for higher layers. Specifically, ISO15118-2 assumes two types of charging methods for electric vehicles: External Identification Means (EIM) and Plug and Charge (PnC). ing. In the case of the external authentication method, the user of the electric automobile 200 pays at the place where the charger 100 is installed or the main body of the charger 100 using cash, electronic money, a prepaid card, a credit card, or the like. On the other hand, plug & charge installs certificate information of a charging contract on the electric vehicle side, and automatically charges when the electric vehicle 200 and the charging spot communicate for charging.

  The electric automobile 200 can store electricity in the battery 204 by mounting the battery 204 and connecting it to the charger 100. Charging the battery 204 of the electric automobile 200 is performed by connecting the connector 110 and the inlet 222. In addition, the electric vehicle 200 can perform HLC with the charger 100 in accordance with the regulations of ISO15118-2, and further supports SLAC processing.

<Charger 100>
The charger 100 will be described. The charger 100 includes a power conversion unit 102, a control unit 104, a communication unit 106, a first timer 108, and a connector 110. The power conversion unit 102, the control unit 104, the communication unit 106, and the first timer 108 are connected by a communication line such as the first communication bus 114.

  The power conversion unit 102 is connected to the system power source and the connector 110 by a power line, and when power is supplied to the electric vehicle 200, the power supplied from the system power source has a predetermined frequency or is converted to a DC voltage, current, or the like. The data is converted and output to the connector 110. Here, the system power source is a power source supplied from a commercial distribution line network owned by a power supplier such as an electric power company.

  The control unit 104 is connected to the connector 110 via a control pilot signal (CPLT: Control Pilot) line 112 and controls the entire charger 100. The control unit 104 detects that the charger 100 and the electric vehicle 200 are connected by monitoring fluctuations in the voltage (CPLT signal voltage) applied to the CPLT line 112. Thereby, it can be confirmed whether or not the connection between the charger 100 and the electric vehicle 200 has been established, and power supply to the electric vehicle 200 can be started.

  The communication unit 106 performs HLC with the electric vehicle 200 according to the control of the control unit 104. The communication unit 106 superimposes the transmission signal on the CPLT line 112 when transmitting a signal, and separates the reception signal superimposed on the CPLT line 112 when receiving the signal. The communication procedure with the electric vehicle 200 is in accordance with the HLC defined in ISO15118-2.

  The first timer 108 measures the elapsed time after the preparation for charging is completed with the electric vehicle 200, and expires when the first specified time has elapsed. Specifically, the first timer 108 expires when the elapsed time after the completion of charging preparation is notified from the electric vehicle 200 superimposed on the CPLT signal becomes the first specified time.

  Connector 110 is configured to be connected to inlet 222 of electric vehicle 200. When the connector 110 is connected to the inlet 222, the charger 100 can supply power to the charging unit 202 of the electric automobile 200 via the connector 110 and the inlet 222. Furthermore, when the connector 110 is connected to the inlet 222, the charger 100 can exchange information with the control unit 206 of the electric automobile 200 and the external communication unit 208 via the connector 110 and the inlet 222. .

<Function of charger 100>
FIG. 2 shows the function of the charger 100. The charger 100 functions as a CPLT signal processing unit 152, an HLC signal processing unit 154, and a communication control unit 156. Each of these units is a function or means realized by any one of the constituent elements of the charger 100 operating according to a command from the CPU mounted on the control unit 104 according to the charger program.

  The CPLT signal processing unit 152 is realized by the control unit 104, and starts charging preparation by transmitting a CPLT signal after the connector 110 and the inlet 222 are connected. For example, the CPLT signal processing unit 152 can notify the electric vehicle 200 that the charger 100 is compatible with HLC by transmitting a CPLT signal with a preset duty ratio such as 5%. Further, for example, when charging at a low level, in which charging is performed after the connection is confirmed, the CPLT signal processing unit 152 transmits a CPLT signal at a duty ratio associated with the rated current of the charger 100. By doing so, the rated current is notified to the electric automobile 200. Since the rated current and the duty ratio of the CPLT signal are linked, the CPLT signal processing unit 152 can notify the rated current by changing the duty ratio of the CPLT signal. Here, charging at a low level is defined in IEC61851.

  The electric vehicle 200 can determine whether or not HLC is supported by the duty ratio of the CPLT signal, and can prepare for charging based on the detected rated current. When the electric vehicle 200 is ready for charging, the electric vehicle 200 notifies the charger 100 of the completion of charging preparation. The completion of charging preparation notified by the electric vehicle 200 is notified to the CPLT signal processing unit 152.

  In addition, when the communication control unit 156 instructs the CPLT signal processing unit 152 to perform the charging preparation process again because the first timer 108 has expired, the CPLT signal processing unit 152 performs so-called low level charging after performing connection confirmation. The CPLT signal is transmitted with the duty ratio when charging with.

  The HLC signal processing unit 154 is realized by the control unit 104 and the communication unit 106. The HLC signal processing unit 154 performs connection processing for high-level communication with the electric vehicle 200 according to control by the communication control unit 156 after the CPLT signal processing unit 152 is notified of completion of charging preparation.

  The communication control unit 156 is realized by the control unit 104, and starts the first timer 108 when the CPLT signal processing unit 152 is notified of completion of charge preparation. After starting the first timer 108, the communication control unit 156 controls the HLC signal processing unit 154 to perform connection processing for high-level communication with the electric vehicle 200 in accordance with the provisions of ISO15118-2. I do. When the connection processing for high-level communication is successful, the communication control unit 156 performs communication processing by high-level communication with the electric vehicle 200 and supplies power to the power conversion unit 102 based on the communication content. Set up. In addition, when the connection process for high-level communication with the electric vehicle 200 is not successful even after the first timer 108 expires, the communication control unit 156 causes the CPLT signal processing unit 152 to perform charge preparation processing again. Instruct to do.

<Electric car 200>
Returning to FIG. 1, the electric vehicle 200 will be described. The electric automobile 200 includes a charging unit 202, a battery 204, a control unit 206, a vehicle exterior communication unit 208, a counter 210, a second timer 212, a vehicle interior communication unit 214, an ECU 216-220, and an inlet 222. Charging unit 202, control unit 206, out-of-vehicle communication unit 208, counter 210, second timer 212, and in-vehicle communication unit 214 are connected by a second communication bus 226. The in-vehicle communication unit 214 and the ECU 216-220 are connected by a third communication bus 228.

  Charging unit 202 charges battery 204 with power from charger 100.

  The battery 204 is configured to include a secondary battery such as a lithium ion battery, a nickel metal hydride battery, or a lead storage battery, and a power storage element such as an electric double layer capacitor, and is charged by supplying power from the charging unit 202. The battery 204 stores power for traveling and supplies power to the traveling motor. In addition, when the electric automobile 200 is braked, the electric power generated by the traveling motor can be stored. In the case of a hybrid vehicle equipped with an engine, the battery 204 can store the power generated by the power generation motor using the power of the engine. When the power generation motor is used as an engine start motor, the battery 204 supplies electric power for starting the engine to the power generation motor.

  Control unit 206 is connected to inlet 222 by CPLT line 224, and mainly controls the power control part of electric automobile 200. The control unit 206 detects that the charger 100 and the electric vehicle 200 are connected by monitoring fluctuations in the Control Pilot signal voltage applied to the CPLT line 224. Thereafter, control unit 206 determines whether or not charger 100 supports HLC based on the duty ratio of the CPLT signal from charger 100, detects the rated current of charger 100, and based on the rated current. Prepare for charging. When the preparation for charging is completed, the control unit 206 notifies the charger 100 of the completion of preparation for charging. For example, the control unit 206 can notify the charger 100 of the completion of charging preparation by changing the voltage applied to the CPLT line 224 or the like. Hereinafter, a process from when the CPLT signal is transmitted from the charger 100 to when the charger 100 is notified of the completion of charge preparation notified from the electric vehicle 200 in response to the CPLT signal is referred to as “charge preparation process”.

  The external communication unit 208 performs high-level communication with the charger 100 according to the control of the control unit 206. The vehicle exterior communication unit 208 superimposes a transmission signal on the CPLT line 224 when transmitting a signal, and separates a reception signal superimposed on the CPLT line 224 when receiving a signal. The vehicle exterior communication unit 208 performs SLAC processing according to ISO15118-3 and performs high-level communication according to ISO15118-2.

  The counter 210 counts the total number of connection processing for SLAC processing and connection processing for HLC. The counter 210 can separately count the number of connection processes for SLAC processing and the number of connection processes for HLC.

  The second timer 212 measures an elapsed time after completion of preparation for charging with the charger 100. Specifically, the second timer 212 starts measuring elapsed time by starting when notifying completion of charging preparation.

  The in-vehicle communication unit 214 communicates with the ECU 216-220 according to a communication protocol such as CAN.

  The ECU 216-220 performs various controls of the vehicle. Although three ECUs are shown in FIG. 1, the number of ECUs is not limited to three, and may be 1-2 or four or more.

<Function of electric vehicle 200>
FIG. 3 shows functions of the electric vehicle 200. The electric vehicle 200 functions as a CPLT signal processing unit 252, a SLAC signal processing unit 254, an HLC signal processing unit 256, and a communication control unit 258. Each of these units is a function or means realized by any one of the constituent elements of the electric vehicle 200 operating according to a command from the CPU mounted on the control unit 206 according to the electric vehicle program.

  CPLT signal processing unit 252 is realized by control unit 206 and receives a CPLT signal transmitted by charger 100 after connector 110 of charger 100 and inlet 222 of electric vehicle 200 are connected. The CPLT signal processing unit 252 determines whether the charger 100 is compatible with HLC based on the duty ratio of the CPLT signal, detects a rated current, and the communication control unit 258 prepares for charging based on the rated current. Start. When the preparation for charging is completed, the CPLT signal processing unit 252 notifies the charger 100 of the completion of preparation for charging. In addition, the CPLT signal processing unit 252 performs connection confirmation when the duty ratio of the CPLT signal indicates that charging is performed at a so-called low level, or when it is determined that the charger 100 does not support HLC. After that, a process for charging at a so-called low level is performed.

  The SLAC signal processing unit 254 is realized by the control unit 206 and the outside communication unit 208. The SLAC signal processing unit 254 performs connection processing for SLAC processing and SLAC processing with the charger 100 according to control by the communication control unit 258 after notifying completion of charge preparation by the CPLT signal processing unit 252. . Here, for connection processing for SLAC processing, a SLAC request such as “CM_SLAC_PARM_REQ” is transmitted to the charger 100, a response signal to the SLAC request is received, and measurement of signal strength such as “CM_START_CHAR_IND” is started. A signal to be transmitted to the charger 100, and receiving a response signal accompanied by signal strength information for the signal. In addition, the SLAC process includes transmitting a signal such as “CM_SLAC_MATCH_REQ” to the charger 100 and receiving a response signal for the signal.

  The HLC signal processing unit 256 is realized by the control unit 206 and the outside communication unit 208. The HLC signal processing unit 256 performs connection processing for HLC and communication processing by HLC with the charger 100 according to control by the communication control unit 258. Here, the connection process for the HLC includes a process of transmitting a signal to the charger 100 assuming that the link is established with the charger 100. Further, the communication processing by HLC includes performing TCP / TLS connection processing with the charger 100.

  The communication control unit 258 is realized by the control unit 206, and initializes the counter 210 and starts the second timer 212 when notifying completion of charge preparation from the CPLT signal processing unit 252. After starting the second timer 212, the communication control unit 258 controls the SLAC signal processing unit 254 to perform connection processing for SLAC processing with the charger 100 in accordance with the provisions of ISO15118-3. Do.

  When the connection process for the SLAC process is completed with the charger 100 and the SLAC process is completed, the communication control unit 258 controls the HLC signal processing unit 256 to comply with the provisions of ISO15118-2. Therefore, connection processing for HLC with the charger 100 is performed.

  Further, the communication control unit 258 skips (skips) the SLAC process when the SLAC signal processing unit 254 cannot connect even after performing a connection process for the SLAC process with the charger 100 a predetermined number of times. Judge. In this case, the communication control unit 258 controls the HLC signal processing unit 256 to perform connection processing for HLC with the charger 100 in accordance with the provisions of ISO15118-2.

  When the connection process for the HLC is successful and the communication process by the HLC is completed, the communication control unit 258 receives power to the charging unit 202 based on the communication content between the charger 100 and the electric vehicle 200. Set up.

  Further, the communication control unit 258 determines that the connection process for the HLC cannot be performed when the connection process for the HLC with the electric vehicle 200 is not successful even when the second timer 212 expires. In this case, electric vehicle 200 stands by until CPLT signal processor 252 receives the CPLT signal transmitted again from charger 100. CPLT signal processing unit 252 performs processing based on the CPLT signal transmitted again from charger 100.

<Operation of charging system>
The operation of the charging system will be described separately for the operation of the charger 100 and the operation of the electric automobile 200.

  FIG. 4 shows the operation of the charger 100.

  In step S <b> 402, CPLT signal processing unit 152 of charger 100 performs a charge preparation process with CPLT signal processing unit 252 of electric automobile 200.

  In step S <b> 404, when the CPLT signal processing unit 152 is notified of the completion of charging preparation notified by the electric vehicle 200, the communication control unit 156 of the charger 100 starts the first timer 108 for the first time. Start measurement.

  Here, it is assumed that electric vehicle 200 is performing connection processing for SLAC processing. However, since charger 100 does not support SLAC processing, electric vehicle 200 determines that connection processing for SLAC processing cannot be performed, and starts connection processing for HLC.

  In step S <b> 406, the HLC signal processing unit 154 of the charger 100 performs connection processing for HLC with the electric vehicle 200 according to the control by the communication control unit 156.

  In step S408, the communication control unit 156 of the charger 100 determines whether or not the connection processing for HLC by the HLC signal processing unit 154 has been successful. For example, the HLC signal processing unit 154 can determine that the connection processing for HLC has succeeded when signals are transmitted to and received from the electric vehicle 200.

  In step S <b> 410, when the connection process for HLC is successful, the HLC signal processing unit 154 of the charger 100 starts communication processing by HLC according to control by the communication control unit 156.

  In step S <b> 412, the charger 100 starts charging by HLC by performing settings for supplying power to the power conversion unit 102 by the communication control unit 104.

  In step S414, if the connection process for HLC is not successful, the communication control unit 104 determines whether or not the first specified time has elapsed depending on whether or not the first timer 108 has expired. to decide. If the first specified time has not elapsed, the process returns to step S406, and connection processing for HLC is performed again.

  In step S416, when the first specified time has elapsed, the communication control unit 156 of the charger 100 instructs the CPLT signal processing unit 152 to perform the charge preparation process again. The CPLT signal processing unit 152 transmits a CPLT signal having a duty ratio when charging at a so-called low level, in which charging is performed after connection confirmation is performed, to the electric automobile 200 according to control by the communication control unit 156.

  In step S418, the communication control unit 156 performs setting for supplying power to the power conversion unit 102 by notifying the CPLT signal processing unit 152 of the charger 100 of the completion of charging preparation notified from the electric vehicle 200. As a result, the charger 100 can start power supply to the electric automobile 200 at a so-called low level using connection confirmation.

  FIG. 5 shows the operation of the electric vehicle 200.

  In step S <b> 502, the CPLT signal processing unit 252 of the electric automobile 200 performs a charging preparation process with the CPLT signal processing unit 152 of the charger 100.

  In step S504, the communication control unit 258 of the electric automobile 200 initializes the counter 210 when the CPLT signal processing unit 252 notifies the completion of charging preparation.

  In step S506, the communication control unit 258 of the electric automobile 200 starts the second time measurement by starting the second timer 212.

  In step S508, the SLAC signal processing unit 254 of the electric automobile 200 performs connection processing for SLAC processing with the charger 100 according to control by the communication control unit 258.

  In step S510, communication control unit 258 of electric automobile 200 increases the value of counter 210.

  In step S512, the communication control unit 258 of the electric automobile 200 determines whether the connection process for the SLAC process by the SLAC signal processing unit 254 has been successful.

  In step S514, when the connection for the SLAC process is successful, the SLAC signal processing unit 254 of the electric automobile 200 performs the SLAC process according to the control by the communication control unit 258.

  In step S516, the HLC signal processing unit 256 of the electric automobile 200 performs communication processing by HLC in accordance with control by the communication control unit 258.

  In step S518, the communication control unit 258 of the electric vehicle 200 performs setting for receiving power to the charging unit 202, thereby starting power reception by the HLC by power supply from the charger 100.

  In step S520, when the connection process for the SLAC process is not successful, the communication control unit 258 of the electric automobile 200 determines whether or not the value of the counter 210 is equal to or greater than the first threshold value m. If the value of the counter 210 is not equal to or greater than the first threshold value m, the process returns to step S508, and connection processing for SLAC processing is performed again.

  In step S522, when the value of the counter 210 is equal to or greater than the first threshold value m, the communication control unit 258 of the electric automobile 200 determines to skip (skip) the SLAC process, and controls the HLC signal processing unit 256. Thus, connection processing for the HLC is performed with the charger 100.

  In step S524, communication control unit 258 of electric automobile 200 increases the value of counter 210.

  In step S526, the communication control unit 258 of the electric automobile 200 determines whether or not the connection processing for HLC by the HLC signal processing unit 256 has been successful. When the connection process for HLC is successful, the process proceeds to step S516.

  In step S528, when the connection process for HLC is not successful, the communication control unit 258 of the electric automobile 200 determines whether or not the value of the counter 210 is equal to or greater than the second threshold value n. Here, the value of the second threshold value n is set larger than the value of the first threshold value m.

  In step S530, when the value of the counter 210 is not equal to or greater than the second threshold value n, the communication control unit 258 determines whether or not the second specified time has elapsed depending on whether or not the second timer 212 has expired. Judging. If the second specified time has not elapsed, the process returns to step S522, and connection processing for HLC is performed again.

  In step S532, when the value of the counter 210 is greater than or equal to the second threshold value n in step S528, or when the second specified time has elapsed in step S530, the communication control unit 258 of the electric automobile 200 generates an HLC signal. It is determined that the connection processing for HLC by the processing unit 256 has not succeeded. Then, the CPLT signal processing unit 252 of the electric vehicle 200 receives the CPLT signal of the duty ratio when starting charging after performing the connection confirmation by the CPLT signal transmitted from the charger 100, thereby performing the charge preparation process. To notify the charger 100 of completion of charging preparation.

  In step S534, the communication control unit 258 performs setting for the charging unit 202 to receive power. As a result, the electric vehicle 200 can start charging with the charger 100 after confirming connection with the CPLT signal.

<HLC>
FIG. 6 shows an example of communication processing by HLC. That is, FIG. 6 shows processing performed in step S410 in FIG. 4 and step S516 in FIG.

  As a premise of the processing shown in FIG. 6, an IP address is assigned to each of the charger 100 and the electric vehicle 200.

  In step S <b> 602, the outside communication unit 208 of the electric automobile 200 detects the charger 100. The out-of-vehicle communication unit 208 of the electric vehicle 200 detects the charger 100 by trying connection to the charger 100 and returning a response.

  In step S604, the control unit 104 of the charger 100 creates a socket, assigns a port number, waits for connection from the external communication unit 208 of the electric automobile 200, and specifies the IP address and port number of the charger 100. Then, TCP / TLS connection processing is performed by connecting.

  In step S606, when the communication unit 106 of the charger 100 accepts the connection, the communication unit 106 newly creates a socket, and establishes a communication session between the socket and the external communication unit 208 of the electric automobile 200.

  In the above-described embodiment, the electric vehicle 200 having the function of performing the SLAC process has been described for receiving power from the charger 100 that does not have the SLAC function. However, the electric vehicle 200 having the SLAC function has the SLAC function. The present invention can also be applied to a case where power from the charger 100 is received. That is, when the connection process for the SLAC process fails between the electric vehicle 200 having the SLAC function and the charger 100 having the SLAC function, the processes shown in FIGS. 4 and 5 are executed. .

  According to the above-described embodiment, connection processing for HLC can be performed even when connection processing for SLAC processing cannot be performed between the charger and the electric vehicle. Thereby, even when SLAC processing cannot be performed, charging processing can be performed by communication processing using HLC between the charger and the electric vehicle.

<Modification (Part 1)>
In one modification of the charging system (part 1), when the SLAC process is skipped and the connection process for the HLC is performed, based on the elapsed time since the start of the connection process for the HLC, It is determined whether to perform the connection process again.

  The hardware configuration of the charger 100 and the electric automobile 200 can be applied as shown in FIG. However, the second timer 212 of the electric automobile 200 measures the elapsed time after skipping the SLAC process and starting the connection process for HLC. Specifically, the second timer 212 is activated when the SLAC process is skipped and the connection process for HLC is started.

2 and 3 can be applied to the functional block diagrams of the charger 100 and the electric vehicle 200, respectively. However, the communication control unit 258 of the electric vehicle 200 cannot perform the connection process for the SLAC process with the charger 100 by the SLAC signal processing unit 254 even if the connection process for the SLAC process is performed for the first threshold value m or more. When the process is skipped and the connection process for the HLC is started, the second timer 212 is started. If the communication control unit 258 does not succeed in the connection process for the HLC with the electric vehicle 200 even if the third specified time elapses due to the expiration of the second timer 212, the connection for the HLC is performed. Judge that processing is not possible. The third specified time can be the same as or different from the second specified time. FIG. 4 can be applied to the operation of the charger 100.

  FIG. 7 shows the operation of the electric vehicle 200. Steps S702 to S718 can apply steps S502 to S504 and S508 to S520 of FIG. In step S720, the communication control unit 258 of the electric automobile 200 starts the third time measurement by starting the second timer 212.

  Steps S722 to S728 can apply steps S522 to S528 of FIG.

  In step S730, if the value of the counter 210 is not equal to or greater than the second threshold value n, the communication control unit 258 determines whether or not the third specified time has elapsed depending on whether or not the second timer 212 has expired. Judging. If the third specified time has not elapsed, the process returns to step S722, and connection processing for HLC is performed again.

  In step S732, if the value of the counter 210 is greater than or equal to the second threshold value n in step S728, or if the third specified time has elapsed in step S730, the communication control unit 258 of the electric automobile 200 generates an HLC signal. It is determined that the connection processing for HLC by the processing unit 256 has not succeeded. Then, the CPLT signal processing unit 252 of the electric vehicle 200 receives the CPLT signal of the duty ratio when starting charging after performing the connection confirmation by the CPLT signal transmitted from the charger 100, thereby performing the charge preparation process. To notify the charger 100 of completion of charging preparation.

  In step S <b> 734, the communication control unit 258 performs settings for the charging unit 202 to receive power. Thereby, the electric vehicle 200 can start charging at a so-called low level using the connection confirmation with the charger 100.

  According to a modification of the charging system, when the SLAC process cannot be performed, the time for trying the connection process for the HLC can be limited. As a result, the time required for connection processing for HLC can be shortened.

<Modification (Part 2)>
In a second modification of the charging system (part 2), when the connection process for the SLAC process is not successful, the SLAC process is skipped based on the remaining battery level of the electric vehicle 200 and the connection process for the HLC is performed. It is determined whether to perform charging at a so-called low level, in which charging is started after confirmation of connection by the CPLT signal.

  The hardware configuration of the charger 100 and the electric automobile 200 can be applied as shown in FIG.

  2 and 3 can be applied to the functional block diagrams of the charger 100 and the electric vehicle 200, respectively. However, when the communication control unit 258 of the electric vehicle 200 is not able to perform connection processing for SLAC processing with the charger 100 by the SLAC signal processing unit 254 more than the first threshold value m. Based on the remaining amount of the battery 204, it is determined whether the SLAC process is skipped and the connection process for the HLC is performed, or whether the charging is started after the connection confirmation by the CPLT signal is performed.

  FIG. 4 can be applied to the operation of the charger 100.

  FIG. 8 shows the operation of the electric vehicle 200.

  Steps S802-S818 can apply steps S502-S504 and S508-S520 of FIG. In step S820, when the value of counter 210 is equal to or greater than first threshold value m, communication control unit 258 of electric automobile 200 determines whether the remaining battery level of battery 204 is equal to or greater than the remaining amount threshold value. The communication control unit 258 can acquire the remaining battery level of the battery 204 detected by the charging unit 202. When the remaining amount of the battery 204 is less than the remaining amount threshold value, the process proceeds to step S830 described later.

  In step S822, when the remaining battery level of the battery 204 is equal to or greater than the remaining amount threshold value, the communication control unit 258 of the electric automobile 200 determines to skip (skip) the SLAC process, and controls the HLC signal processing unit 256. Thus, connection processing for the HLC is performed with the charger 100.

  Steps S824-S828 can apply steps S524-S528 of FIG.

  In step S828, if the value of the counter 210 is not equal to or greater than the second threshold value n, the process returns to step S822, and connection processing for HLC is performed again.

  In step S830, when the value of the counter 210 is equal to or greater than the second threshold value n in step S828, the communication control unit 258 of the electric automobile 200 determines that the connection processing for HLC by the HLC signal processing unit 256 has not succeeded. To do. Then, the CPLT signal processing unit 252 of the electric vehicle 200 receives the CPLT signal of the duty ratio when starting charging after performing the connection confirmation by the CPLT signal transmitted from the charger 100, thereby performing the charge preparation process. To notify the charger 100 of completion of charging preparation.

  In step S832, communication control unit 258 performs setting for charging unit 202 to receive power. As a result, the electric vehicle 200 can start charging with the charger 100 after confirming connection with the CPLT signal.

  In this modification, the values of the first threshold value m and the second threshold value n can be changed based on the determination result of whether or not the remaining battery level is equal to or greater than the remaining amount threshold value. Accordingly, it is possible to control whether the SLAC process is skipped and the connection process for the HLC is performed, or the charging is started after the connection confirmation by the CPLT signal is performed.

  According to a modification of the charging system, when the remaining battery level is low, connection processing for HLC is not performed, and charging at a low level using connection confirmation can be performed. For this reason, charging can be started quickly without requiring time for connection processing for HLC and communication processing by HLC.

<Modification (Part 3)>
In a modification (part 3) of the charging system, when the connection process for the SLAC process is not successful, the SLAC process is skipped and the connection process for the HLC is performed, or the connection confirmation is used, so-called low Whether to charge at a level is set in advance, and control is performed according to the setting.

  The hardware configuration of the charger 100 and the electric automobile 200 can be applied as shown in FIG.

  2 and 3 can be applied to the functional block diagrams of the charger 100 and the electric vehicle 200, respectively. However, when the communication control unit 258 of the electric vehicle 200 is not able to perform connection processing for SLAC processing with the charger 100 by the SLAC signal processing unit 254 more than the first threshold value m. Whether the connection process for the HLC is performed by skipping the SLAC process or the charging process at a so-called low level using the connection confirmation is set in advance.

  FIG. 4 can be applied to the operation of the charger 100.

  FIG. 9 shows the operation of the electric vehicle 200.

  Steps S902 to S918 can apply steps S502 to S504 and S508 to S520 of FIG. In step S920, if the value of the counter 210 is equal to or greater than the first threshold value m, the communication control unit 258 of the electric vehicle 200 is set to skip the SLAC process and perform the connection process for HLC. Judging. If it is not set to skip the SLAC process and perform the connection process for HLC, the process proceeds to step S930 described later.

  In step S922, when it is set to skip the SLAC process and perform the connection process for HLC, the communication control unit 258 of the electric vehicle 200 determines to skip (skip) the SLAC process and perform the HLC signal process. By controlling the unit 256, connection processing for the HLC with the charger 100 is performed.

  Steps S924-S928 can apply steps S524-S528 of FIG. If the value of the counter 210 is not greater than or equal to the second threshold value n in step S928, the process returns to step S922, and connection processing for HLC is performed again.

  In step S930, if it is not set to perform connection processing for HLC in step S920, or if the value of the counter 210 is greater than or equal to the second threshold value n in step S928, the communication control unit 258 of the electric automobile 200. Determines that the connection by HLC by the HLC signal processing unit 256 has not succeeded. Then, the CPLT signal processing unit 252 of the electric vehicle 200 receives the CPLT signal of the duty ratio when starting charging after performing the connection confirmation by the CPLT signal transmitted from the charger 100, thereby performing the charge preparation process. To notify the charger 100 of completion of charging preparation.

  In step S932, step S534 of FIG. 5 can be applied.

  According to one modification of the charging system, when connection processing for SLAC processing fails, connection processing for HLC is performed or connection processing for HLC is not performed and connection confirmation is performed using a CPLT signal. In addition, since it is set whether to start charging after that, it is possible to reduce the processing load for determining which processing is performed and to shorten the processing time.

<Modification (Part 4)>
A modification (part 4) of the charging system includes a plurality of chargers, and a plurality of chargers are mixed with those that support SLAC processing and those that do not support them.

FIG. 10 shows a modification (No. 4) of the charging system. The charging system includes chargers 100 ₁ and 100 ₂ that do not support SLAC processing, and chargers 300 _{1 to} 300 ₃ that support SLAC processing. Electric vehicle 200 is connected to the charger 300 ₁ corresponds to the SLAC processing. The electric vehicle 200 can be connected to any of the chargers 100 _{1 to} 100 ₂ and 300 _{1 to} 300 ₃ . Hereinafter, when it is not necessary to distinguish between the chargers 100 ₁ and 100 ₂ that do not support the SLAC process, the chargers 100 ₁ and 100 ₂ are represented by the charger 100, and the chargers 300 _{1 to} 300 ₃ that support the SLAC process need to be distinguished. When there is no charge, it is represented by the charger 300.

  The electric vehicle 200 according to a modification of the charging system identifies the connected charger based on the signal strength of the response signal transmitted from the charger 300 during the connection process for the SLAC process.

The charger 100 of FIG. 1 can be applied to the hardware configurations of the chargers 100 ₁ and 100 ₂ that do not support SLAC processing.

<Charger 300>
FIG. 11 shows a charger 300 that supports SLAC processing. The charger 300 includes a power conversion unit 302, a control unit 304, a communication unit 306, a third timer 308, and a connector 310. The power conversion unit 302, the control unit 304, the communication unit 306, and the third timer 308 are connected by a communication line such as a fourth communication bus 314.

  The power conversion unit 302 is connected to the system power supply and the connector 310 by a power line, and when power is supplied to the electric automobile 200, the power supplied from the system power supply has a predetermined frequency or is converted to a DC voltage, current, or the like. The data is converted and output to the connector 310.

  Control unit 304 is connected to connector 310 by CPLT line 312 and controls charger 300 as a whole. The controller 304 detects that the charger 300 and the electric vehicle 200 are connected by monitoring fluctuations in the voltage applied to the CPLT line 312. Thereby, it can be confirmed whether or not the connection between the charger 300 and the electric vehicle 200 has been established, and power supply to the electric vehicle 200 can be started.

  The communication unit 306 performs connection processing for SLAC processing, SLAC processing, and communication processing by HLC with the electric vehicle 200 under the control of the control unit 304. The communication unit 306 superimposes the transmission signal on the CPLT line 312 when transmitting the signal, and separates the reception signal superimposed on the CPLT line 312 when receiving the signal. Connection processing for SLAC processing and SLAC processing are performed with the electric vehicle 200 in accordance with ISO15118-3, and communication processing by HLC is performed in accordance with ISO15118-2.

  The third timer 308 measures the elapsed time after the preparation for charging with the electric vehicle 200 is completed, and expires when the fourth specified time has elapsed. Specifically, the third timer 308 expires when the elapsed time after receiving the notification of completion of charge preparation notified from the electric vehicle 200 in response to the CPLT signal becomes the fourth specified time.

  The connector 310 is configured to be connected to the inlet 222 of the electric vehicle 200 shown in FIG. When the connector 310 is connected to the inlet 222, the charger 300 can supply power to the charging unit 202 of the electric automobile 200 via the connector 310 and the inlet 222. Furthermore, when the connector 310 is connected to the inlet 222, the charger 300 can exchange information with the control unit 206 of the electric automobile 200 and the external communication unit 208 via the connector 310 and the inlet 222. .

<Function of charger 300>
FIG. 12 shows the function of the charger 300. The charger 300 functions as a CPLT signal processing unit 352, an HLC signal processing unit 354, a communication control unit 356, and a SLAC signal processing unit 358. Each of these units is a function or means realized by any one of the constituent elements of the charger 300 operating according to a command from the CPU mounted on the control unit 304 in accordance with the charger program.

  The CPLT signal processing unit 352 is realized by the control unit 304 and starts preparation for charging by transmitting a CPLT signal after the connector 310 and the inlet 222 are connected. For example, the CPLT signal processing unit 352 can notify the electric vehicle 200 that the charger 300 is compatible with HLC by transmitting a CPLT signal with a preset duty ratio such as 5%. In addition, for example, when charging is performed at a so-called low level after charging is confirmed, the CPLT signal processing unit 352 transmits a CPLT signal at a duty ratio associated with the rated current of the charger 300. By doing so, the rated current is notified to the electric automobile 200. CPLT signal processing unit 352 is notified of the completion of charging preparation notified by electric vehicle 200. In addition, when the third timer 308 has expired and the CPLT signal processing unit 352 is controlled to perform the charging preparation process again, the CPLT signal processing unit 352 receives the CPLT signal at a duty ratio for charging after performing the connection confirmation using the CPLT signal. Send.

  The SLAC signal processing unit 358 is realized by the control unit 304 and the communication unit 306. The SLAC signal processing unit 358 performs connection processing for SLAC processing and SLAC processing with the electric vehicle 200 according to control by the communication control unit 356 after the CPLT signal processing unit 352 is notified of completion of charging preparation. Do. The SLAC signal processing unit 358 measures signal quality such as signal strength of a signal such as a SLAC request transmitted from the electric vehicle 200 during connection processing for SLAC processing, and is attached to a response signal for the signal, Send.

  The HLC signal processing unit 354 is realized by the control unit 304 and the communication unit 306. After the SLAC processing is performed by the SLAC signal processing unit 358, the HLC signal processing unit 354 performs communication processing by the HLC with the electric vehicle 200 according to control by the communication control unit 356. The HLC signal processing unit 354 performs connection processing for HLC and communication processing by HLC according to control by the communication control unit 356 after the CPLT signal processing unit 352 is notified of completion of charging preparation.

  The communication control unit 356 is realized by the control unit 304 and starts the third timer 308 when the CPLT signal processing unit 352 is notified of the completion of charging preparation. After starting the third timer 308, the communication control unit 356 controls the SLAC signal processing unit 358 to perform connection processing for SLAC processing with the electric vehicle 200 in accordance with the provisions of ISO15118-3. Do. When the connection process for the SLAC process is successful, the communication control unit 356 performs the SLAC process by controlling the SLAC signal processing unit 358. After the SLAC processing, the communication control unit 356 controls the HLC signal processing unit 354 to perform communication processing by the HLC with the electric vehicle 200 in accordance with the provisions of ISO15118-2. After the communication process by the HLC is completed, the communication control unit 356 performs setting for supplying power to the power conversion unit 302 based on the content of the communication process by the HLC.

  In addition, when the third timer 308 expires, the communication control unit 356 does not succeed in the connection processing for SLAC processing or the connection processing for HLC with the electric vehicle 200, and the CPLT signal processing unit Control is performed so that the charging preparation process is performed again at 352.

<Electric car 200>
1 can be applied to the hardware configuration of the electric vehicle 200, and FIG. 3 can be applied to the functional block diagram of the electric vehicle 200. However, in the functional block diagram of the electric automobile 200, the SLAC signal processing unit 254 transmits a signal such as a SLAC request according to the control of the communication control unit 258, and charging corresponding to the SLAC processing for the signal. Signal strength information attached to response signals respectively transmitted from the devices 300 _{1 to} 300 ₃ is acquired. Ideally, an electric vehicle that has transmitted a signal such as an SLAC request receives a response signal transmitted by a charger connected to the electric vehicle. However, since the SLAC request is transmitted by superimposing a short wavelength high frequency signal on the CPLT signal line, it is also transmitted as a radio wave. For this reason, the signal such as the SLAC request may be received not only by the charger connected to the electric vehicle that has transmitted the signal such as the SLAC request but also by other chargers. The charger that has received the signal such as the SLAC request measures the signal quality such as the signal strength of the signal, attaches the response signal to the signal such as the SLAC request, and transmits the signal.

The communication control unit 258 identifies the response signal with the highest signal strength among the signal strength information attached to the response signals from the chargers 300 _{1 to} 300 ₃ received by the SLAC signal processing unit 254, Identification information such as the MAC address of the charger 300 included in the response signal is acquired. Here, the communication control unit 258 can also specify a response signal having the highest signal strength among signal strengths equal to or higher than a certain threshold. That is, the communication control unit 258 does not specify a response signal when all the signal strengths are less than a certain threshold value. Thereby, the electric vehicle 200 can specify the response signal transmitted by the charger 300 that may be connected.

  The communication control unit 258 controls the SLAC signal processing unit 254 to continue connection processing for SLAC processing with the charger that has transmitted the response signal with the highest signal strength information. When the connection process for SLAC processing is completed, the communication control unit 258 performs SLAC processing and performs communication processing by HLC by controlling the HLC signal processing unit 256.

On the other hand, if the connection process for the SLAC process is continued with the charger that has transmitted the response signal accompanied by the highest signal strength information, but fails, the SLAC signal processing unit 254 displays a SLAC request or the like. The signal is transmitted again, and the signal strength information attached to the response signals respectively transmitted from the chargers 300 _{1 to} 300 ₃ corresponding to the SLAC processing for the signal such as the SLAC request is acquired. Here, when the connection process for SLAC processing is continued with the charger that sent the response signal with the highest signal strength information, the connection process was successful, but the SLAC process failed In addition, the SLAC signal processing unit 254 transmits a signal such as a SLAC request again, and a response signal transmitted from each of the chargers 300 _{1 to} 300 ₃ corresponding to the SLAC process in response to the signal such as the SLAC request. The signal strength information attached to can be acquired.

The communication control unit 258 performs SLAC processing based on the signal strength information attached to the response signal from the chargers 300 _{1 to} 300 ₃ received by the SLAC signal processing unit 254 and the acquired MAC address. Exclude chargers that fail to connect. Then, the communication control unit 258 identifies the response signal with the highest signal strength among the signal strengths attached to the response signal from the charger excluding the charger that failed in the connection processing for the SLAC processing. Then, the MAC address of the charger 300 included in the response signal is acquired.

  The communication control unit 258 controls the SLAC signal processing unit 254 to continue the connection process for the SLAC process with the charger that has transmitted the response signal having the highest signal strength. When the connection process for SLAC processing is completed, the communication control unit 258 performs SLAC processing and performs communication processing by HLC by controlling the HLC signal processing unit 256.

  That is, the communication control unit 258 controls the SLAC signal processing unit 254 to perform connection processing for SLAC processing sequentially from the charger that has transmitted the response signal with the highest signal strength information. When the connection process for the SLAC process fails, the communication control unit 258 excludes the charger and performs the same process, that is, the charger that has transmitted the response signal having the highest signal strength. Continue connection processing for SLAC processing.

<Operation of charging system>
The operation of the charging system will be described separately for the operation of the charger 300 and the operation of the electric automobile 200.

  FIG. 13 shows the operation of the charger 300.

  In step S1302, CPLT signal processing unit 352 of charger 300 performs a charge preparation process with CPLT signal processing unit 252 of electric automobile 200.

  In step S1304, SLAC signal processing unit 358 of charger 300 performs connection processing for SLAC processing in accordance with control by communication control unit 356. That is, the signal strength of a signal such as a SLAC request transmitted from the electric vehicle 200 is measured, and is transmitted along with a response signal for the signal such as the SLAC request.

  In step S1306, communication control unit 356 of charger 300 determines whether or not the connection process for the SLAC process is successful. If the connection process for the SLAC process is not successful, it is determined that the electric vehicle 200 is not connected, and the process ends.

  In step S1308, when the connection process for the SLAC process is successful, the communication control unit 356 controls the SLAC signal processing unit 358 to perform the SLAC process.

  In step S1310, the HLC signal processing unit 354 of the charger 300 performs communication processing by HLC according to control by the communication control unit 356.

  In step S1312, the communication control unit 356 of the charger 300 starts charging by HLC by performing settings for supplying power to the power conversion unit 302.

  FIG. 14 shows the operation of the electric vehicle 200.

  In step S1402, the CPLT signal processing unit 252 of the electric automobile 200 performs a charge preparation process with the CPLT signal processing unit 352 of the charger 300.

  In step S <b> 1404, the SLAC signal processing unit 254 of the electric automobile 200 transmits a signal such as a SLAC request signal according to control by the communication control unit 258.

  In step S1406, the SLAC signal processing unit 254 of the electric automobile 200 acquires the signal strength information attached to the response signal to the signal such as the SLAC signal according to the control by the communication control unit 258.

  In step S1408, the SLAC signal processing unit 254 of the electric automobile 200 acquires the MAC address of the charger that has transmitted the response signal accompanied by the highest signal strength information, under the control of the communication control unit 258.

  In step S1410, the SLAC signal processing unit 254 of the electric automobile 200 is connected to the charger having the MAC address based on the acquired MAC address according to the control by the communication control unit 258. I do.

  In step S1412, the SLAC signal processing unit 254 of the electric automobile 200 determines whether or not the connection process for the SLAC process has succeeded.

  In step S1414, when the connection for the SLAC process is successful, the SLAC signal processing unit 254 of the electric automobile 200 performs the SLAC process according to the control by the communication control unit 258.

  In step S1416, the HLC signal processing unit 256 of the electric automobile 200 performs communication processing by HLC according to the control by the communication control unit 258.

  In step S1418, the communication control unit 258 of the electric automobile 200 performs setting for receiving power to the charging unit 202, thereby starting charging by the HLC by receiving power from the charger.

  In step S1420, when the connection process for the SLAC process is not successful, the SLAC signal processing unit 254 of the electric automobile 200 transmits a signal such as a SLAC request signal according to the control by the communication control unit 258.

  In step S <b> 1422, the SLAC signal processing unit 254 of the electric automobile 200 acquires the signal strength attached to the response signal to the SLAC signal according to the control by the communication control unit 258.

  In step S1424, the SLAC signal processing unit 254 of the electric automobile 200 responds with the highest signal strength information among the chargers other than the charger having the already acquired MAC address, under the control of the communication control unit 258. Get the MAC address of the charger that sent.

  In step S1426, the SLAC signal processing unit 254 of the electric automobile 200 is connected to the charger having the MAC address based on the acquired MAC address according to the control by the communication control unit 258. I do.

  In step S1428, the SLAC signal processing unit 254 of the electric automobile 200 determines whether or not the connection process for the SLAC process is successful. If the connection process for the SLAC process is successful, the process moves to step S1414 to perform the SLAC process.

  In step S1430, SLAC signal processing unit 254 of electric vehicle 200 determines whether or not connection processing for SLAC processing has been performed for all chargers. If connection processing for SLAC processing is not performed for all chargers, the process returns to step S1420 to transmit a SLAC request signal.

  When connection processing for SLAC processing is performed for all chargers, the processing is terminated because SLAC processing cannot be performed.

Electric vehicle 200 is not the charger 300 ₁ corresponds to the SLAC processing, if that did not correspond to the SLAC processing is connected to the charger capable of performing the HLC, because it can not SLAC process described above The processing of the embodiment and the modified example can also be executed.

In addition, when the connection process for the SLAC process is continued with the charger that sent the response signal with the highest signal strength information attached, the connection process was successful, but the SLAC process failed, The SLAC signal processing unit 254 transmits a signal such as a SLAC request again, and is attached to a response signal transmitted from each of the chargers 300 _{1 to} 300 ₃ corresponding to the SLAC process in response to the signal such as the SLAC request. Signal strength information can be acquired.

In a modification of the charging system, the electric vehicle 200 connected to one of the plurality of chargers 300 _{1 to} 300 ₃ is connected based on reception intensity information attached to a response signal from the charger 300. Connection processing for SLAC processing can be performed sequentially from the charger that is likely to be.

  In the above-described embodiments and modifications, the CPLT signal processing unit of the electric vehicle is an example of the first signal processing unit of the electric vehicle, and the SLAC signal processing unit of the electric vehicle is the second signal processing unit of the electric vehicle. The HLC signal processing unit of the electric vehicle is an example of a third signal processing unit of the electric vehicle, and the CPLT signal processing unit of the charger is an example of a fourth signal processing unit of the charger. The HLC signal processing unit is an example of a fifth signal processing unit of the charger, and the SLAC signal processing unit of the charger is an example of a sixth signal processing unit of the charger.

  Although the present invention has been described above with reference to specific embodiments and modifications, each embodiment and modification is merely illustrative, and those skilled in the art will recognize various modifications, modifications, alternatives, and substitutions. You will understand examples. For convenience of explanation, an apparatus according to an embodiment of the present invention has been described using a functional block diagram, but such an apparatus may be implemented in hardware, software, or a combination thereof. The present invention is not limited to the above-described embodiments, and various variations, modifications, alternatives, substitutions, and the like are included without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Charger 102 Power conversion part 104 Control part 106 Communication part 108 1st timer 110 Connector 112 CPLT line 114 1st communication bus 152 CPLT signal processing part 154 HLC signal processing part 156 Communication control part 200 Electric vehicle 202 Charging part 204 Battery 206 Control unit 208 External communication unit 210 Counter 212 Second timer 214 In-vehicle communication unit 216-220 ECU
222 Inlet 252 CPLT signal processing unit 254 SLAC signal processing unit 256 HLC signal processing unit 258 Communication control unit

Claims (6)

A charging system having a charger and an electric vehicle charged by electric power fed from the charger,
Electric cars
A first signal processing unit for confirming connection with the charger based on a control pilot signal transmitted by the charger connected to the electric vehicle;
A second signal for performing signal processing for signal level attenuation characterization processing, which is a procedure for specifying the charger connected to the electric vehicle after connection confirmation is performed by the first signal processing unit. A processing unit;
A third signal processing unit that performs signal processing for high-level communication regarding charging between the charger connected to the electric vehicle;
When the signal level attenuation characterization process cannot be performed with the charger by the second signal processing unit, the signal level attenuation characterization process is skipped, and the third signal processing unit And a first communication control unit that controls to perform signal processing for the high-level communication,
The charger is
A fourth signal processing unit for confirming connection with the electric vehicle by transmitting the control pilot signal to the electric vehicle;
A fifth signal processing unit that performs signal processing for the high-level communication with respect to charging with the electric vehicle;
When the signal level attenuation characterization process cannot be performed with the charger by the second signal processing unit, and the signal processing for the high level communication is performed by the third signal processing unit. And a second communication control unit that controls the fifth signal processing unit to perform signal processing for the high-level communication when it is controlled to be performed.   The first communication control unit is a control transmitted again to the first signal processing unit when the third signal processing unit cannot perform the high-level communication with the charger. The charging system according to claim 1, wherein control is performed so that power is received after connection confirmation based on the pilot signal.   The first communication control unit controls the third signal processing unit to perform signal processing for the high-level communication based on a remaining battery level of the electric vehicle, or the first communication control unit The charging system according to claim 1, wherein the signal processing unit is controlled to receive power after connection confirmation based on a control pilot signal transmitted again. The charger is
A sixth signal processing unit that performs signal processing for signal level attenuation characterization processing that is a procedure for identifying the electric vehicle;
The first communication control unit
If the signal level attenuation characterization process cannot be performed with the sixth signal processing unit by the second signal processing unit, the signal level attenuation characterization process is skipped, and the third The charging system according to claim 1, wherein the signal processing unit is controlled to perform signal processing for the high-level communication. An electric vehicle that is charged by power supplied from a charger,
A first signal processing unit that performs connection confirmation based on a control pilot signal transmitted by a charger connected to the electric vehicle;
A second signal for performing signal processing for signal level attenuation characterization processing, which is a procedure for specifying the charger connected to the electric vehicle after connection confirmation is performed by the first signal processing unit. A processing unit;
A third signal processing unit that performs signal processing for high-level communication regarding charging between the charger connected to the electric vehicle;
When the signal level attenuation characterization process cannot be performed with the charger by the second signal processing unit, the signal level attenuation characterization process is skipped, and the third signal processing unit And a communication control unit that controls to perform signal processing for the high-level communication. A charger for charging a battery of an electric vehicle,
A first signal processing unit for confirming connection with the electric vehicle by transmitting a control pilot signal to the electric vehicle;
A second signal processing unit that performs signal processing for high-level communication regarding charging with the electric vehicle;
When the signal level attenuation characterization process, which is a procedure for identifying the charger connected to the electric vehicle between the electric vehicle and the electric vehicle, has failed, and the high-level communication is performed by the electric vehicle. And a communication control unit that controls the second signal processing unit to perform signal processing for the high-level communication when controlled to perform signal processing for the high-level communication.

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