JP6493148B2 - Charger - Google Patents

Description

  The present invention relates to a technique for charging a power storage device mounted on a vehicle using a power source external to the vehicle.

  A technique for charging a power storage device mounted on a vehicle using a power source external to the vehicle is known. For example, in Japanese Patent Laying-Open No. 2015-061337 (Patent Document 1), the control device in the sleep state is activated at the scheduled charging start time, the scheduled charging start time is reset, and the charging start schedule reset to the current time. A charging device is disclosed that enters a sleep state again when the difference from the time is greater than or equal to a predetermined time.

Japanese Patent Laying-Open No. 2015-061337

  By the way, the charging cable for connecting the power source outside the vehicle and the vehicle is provided with a relay circuit on the power line, and when the relay circuit is in a conductive state, a signal indicating information on the power source outside the vehicle is displayed on the vehicle. Is output. The charging start scheduled time is set on the vehicle side using such power supply information. However, when the resetting of the scheduled charging start time is repeated, the operation of the relay circuit is repeated for each resetting, so that the durability of the relay circuit deteriorates and the charging cable may deteriorate. .

  The present invention has been made to solve the above-described problems, and provides a charging device that suppresses deterioration of a charging cable.

  A charging device according to an aspect of the present invention is a charging device that charges an in-vehicle power storage device with electric power supplied from an AC power supply outside the vehicle. This charging device is provided in a vehicle, converts AC power received from an AC power source into DC power and can be supplied to a power storage device, one end is electrically connected to the AC power source, and the other end is A charging cable that is electrically connected to the converter and outputs a signal indicating information on the AC power source to the vehicle when a relay circuit provided on the power line between one end and the other end is in a conductive state; and a power storage device The acquisition device for acquiring the temperature of the power supply and the AC power supply information acquired by bringing the relay circuit into a conductive state when the charging cable is connected to the vehicle are stored, and the power supply information and the power storage device are fully charged. Start charging by calculating the charging time required for the power storage device to reach the fully charged state from the amount of charge required to enter the state and the temperature of the power storage device, and subtracting the charging time from the scheduled charging end time Set the time, and a control device which shifts to the standby state until the set charging start time. The control device updates the charging time from the stored power supply information, the charge amount, and the temperature of the power storage device while maintaining the relay circuit in the cut-off state during standby, and the charging updated from the scheduled charging end time The charging start time is updated by subtracting the time.

  According to the present invention, since the charging start time is updated based on the stored power supply information during standby, the relay circuit can be maintained in a cut-off state. Therefore, since the operation of the relay circuit is suppressed every time the charging start time is updated, deterioration of the durability of the relay circuit can be suppressed. Therefore, it is possible to provide a charging device that suppresses deterioration of the charging cable.

It is a figure which shows the structure of the charging device mounted in the vehicle which concerns on this Embodiment. It is a flowchart which shows the control processing performed by ECU. It is a figure which shows the relationship between charging time and external temperature. It is a timing chart (the 1) for explaining operation of ECU. 6 is a timing chart (part 2) for explaining the operation of the ECU.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  FIG. 1 is a diagram showing a configuration of a charging device mounted on a vehicle 1 according to the present embodiment. The vehicle 1 is, for example, an electric vehicle that uses a motor generator (not shown) as a drive source. The vehicle 1 can charge the battery 70 with electric power supplied from a system power supply (hereinafter referred to as an external power supply) 400 outside the vehicle.

  As shown in FIG. 1, the vehicle 1 includes a PCU (Power Control Unit) 60, a battery 70, an inlet 110, an ECU (Electronic Control Unit) 200, an outside air temperature sensor 206, and a conversion device 300.

  The battery 70 is a direct-current power storage device that stores electric power for driving a motor generator that is a drive source, and is, for example, a secondary battery that includes a nickel-metal hydride battery, a lithium ion battery, or the like. The output voltage of the battery 70 is about 200V, for example. The power storage device may be any DC power source that can be recharged. For example, a capacitor or the like may be used instead of or in addition to the secondary battery.

  The PCU 60 is connected to the battery 70 via the system main relay 71. PCU 60 is controlled by a control signal from ECU 200 and performs power conversion between battery 70 and the motor generator.

  The inlet 110 is a power interface for receiving power from the external power source 400 (hereinafter referred to as “external power”) or supplying power to an electric device outside the vehicle. The inlet 110 is configured to be connectable to a charging plug 410 connected to the external power source 400. Charging plug 410 and external power supply 400 are connected by charging cable 412. The charging cable 412 is provided with a charging circuit interruption device (hereinafter referred to as CCID (Charging Circuit Interrupt Device)) 10 (described later).

  The charging device according to the present embodiment is configured by ECU 200, outside air temperature sensor 206, conversion device 300, and charging cable 412.

  Conversion device 300 is an AC / DC converter that converts AC power from external power supply 400 into DC power. Referring to FIG. 1, the input side of conversion device 300 is connected to the ACIH terminal and ACIC terminal of inlet 110 via power lines ACL1 and ACL2. The output side of conversion device 300 is connected to positive line PL and negative line NL connecting battery 70 and PCU 60 via charging power lines ACLC 1, ACLC 2 and charging relay 72.

  In the converter 300, when the charging plug 410 is connected to the inlet 110 and the contact portion of the charging relay 72 is in a conductive state, as shown by the broken arrow in FIG. The external electric power (alternating current) input to is converted into electric power (direct current) that can be charged in the battery 70 and output to the battery 70. That is, the battery 70 is charged with external power. In the following description, charging the battery 70 using external power is referred to as “external charging”.

  Charging relay 72 is provided on two charging power lines ACLC1 and ACLC2 that connect the output side of converter 300 to positive line PL and negative line NL of battery 70. The charging relay 72 opens the contact or makes it conductive based on a control signal from the ECU 200.

  For example, when stopping external charging of the battery 70, the ECU 200 stops the operation of the conversion device 300 and opens the contact of the charging relay 72. For example, when executing external charging of the battery 70, the ECU 200 turns on the contact of the charging relay 72 and operates the conversion device 300. The outside air temperature sensor 206 detects the outside air temperature and transmits the detection result to the ECU 200.

  In the present embodiment, conversion device 300 includes a power conversion unit 302 and a voltage sensor 304. The power conversion unit 302 converts AC power from the external power source 400 into DC power in accordance with a control signal from the ECU 200. The voltage sensor 304 detects the voltage of AC power supplied to the power conversion unit 302. Voltage sensor 304 transmits a signal indicating the detected voltage to ECU 200.

  Each operation of system main relay 71 and charging relay 72 is controlled by ECU 200.

  The inlet 110 is disposed on the side surface of the vehicle 1 or the like, and is formed in a shape capable of connecting the charging plug 410 as described above. Inlet 110 includes an ACIH terminal, an ACIC terminal, a GND terminal, a PISW terminal, and a CPLT terminal.

  Charging plug 410 also includes an ACIH terminal, an ACIC terminal, a GND terminal, a PISW terminal, and a CPLT terminal. Therefore, for example, when the charging plug 410 is physically connected to the inlet 110, the ACIH terminal, the ACIC terminal, the GND terminal, the PISW terminal, and the CPLT terminal of the charging plug 410 are the ACIH terminal of the inlet 110. The ACIC terminal, the GND terminal, the PISW terminal, and the CPLT terminal are physically and electrically connected to each other.

  The CPLT terminal is connected to ECU 200 via a connection line. The PISW terminal is connected to the ECU 200 via a connection line. A ground line is connected to the GND terminal. ECU 200 receives a signal indicating the thickness of charging cable 412 on charging plug 410 side (hereinafter referred to as pilot signal CPLT) via the CPLT terminal. ECU 200 also receives a signal indicating whether charging plug 410 is connected or not connected via the PISW terminal.

  The ECU 200 incorporates a CPU (Central Processing Unit) 202 and a memory 204, and executes predetermined arithmetic processing based on information stored in the memory 204 and information from various sensors. ECU 200 controls each device of vehicle 1 based on the calculation result.

  For example, when the user performs an operation of connecting charging plug 410 to inlet 110, ECU 200 performs external charging by bringing contact point of charging relay 72 into a conductive state and operating converter 300. When battery 70 becomes fully charged by external charging (for example, when SOC (State Of Charge) exceeds a threshold value), ECU 200 determines that external charging has ended, stops the operation of conversion device 300, And the external charge is complete | finished by making the contact of the charging relay 72 into an open state.

  The ECU 200 controls the CCID relay 12 built in the CCID 10 by changing the potential of the pilot signal CPLT. CCID 10 includes CCID relay 12 and control circuit 14.

  The CCID relay 12 is provided on the power line 30 of the charging cable 412. The CCID relay 12 is controlled by the control circuit 14. When the CCID relay 12 is open, the electric circuit is cut off in the charging cable 412. On the other hand, when the CCID relay 12 is closed, the power line 30 of the charging cable 412 becomes conductive, so that power is supplied from the external power source 400 to the vehicle 1.

  Control circuit 14 outputs pilot signal CPLT to ECU 200 via charging plug 410 and inlet 110. The pilot signal CPLT is a signal for notifying the ECU 200 of the rated current of the charging cable 412 from the control circuit 14. Pilot signal CPLT is also used as a signal for remotely operating CCID relay 12 from ECU 200 based on the potential of pilot signal CPLT operated by ECU 200. Then, the control circuit 14 controls the CCID relay 12 based on the potential change of the pilot signal CPLT.

  Although not shown, the control circuit 14 includes a CPU, a storage device, and an input / output buffer, inputs / outputs each sensor and pilot signal CPLT, and controls the charging operation of the charging cable 412.

  Control circuit 14 further includes an oscillation circuit (not shown). The oscillation circuit outputs a non-oscillation signal when the potential of the pilot signal CPLT detected by the voltage sensor is a specified potential (for example, 12 V), and when the potential of the pilot signal CPLT is lowered from the specified potential (For example, 9V) outputs a signal that oscillates at a specified frequency (for example, 1 kHz) and a duty cycle.

  The potential of pilot signal CPLT is manipulated by ECU 200. The duty cycle is set based on the rated current that can be supplied from the external power supply 400 to the vehicle 1 via the charging cable 412.

  As described above, pilot signal CPLT oscillates at a specified period when the potential of pilot signal CPLT decreases from the specified potential. Here, the pulse width of pilot signal CPLT is set based on the rated current that can be supplied from external power supply 400 to vehicle 1 via charging cable 412. That is, the rated current is notified from the control circuit 14 to the ECU 200 of the vehicle 1 using the pilot signal CPLT by the duty indicated by the ratio of the pulse width to the oscillation period.

  Note that the rated current is determined for each charging cable 412, and the rated current varies depending on the type of charging cable 412. Therefore, the duty of pilot signal CPLT is different for each charging cable 412.

  ECU 200 can detect the rated current that can be supplied to vehicle 1 via charging cable 412 based on the duty of pilot signal CPLT received via the control pilot line.

  When the potential of pilot signal CPLT is further lowered by ECU 200 (for example, 6V), control circuit 14 closes the contact of CCID relay 12 to make it conductive.

  ECU 200 includes a resistance circuit (not shown) for changing the potential of pilot signal CPLT. The resistance circuit includes, for example, a first switch, a second switch, and a plurality of pull-down resistors. The first switch and the second switch are controlled to be conductive or nonconductive according to a control signal from the CPU 202. For example, the first switch and the second switch may be mechanical contacts, or a semiconductor such as a transistor may be used. The CPU 202 includes a first state in which both the first switch and the second switch are in an off state, a second state in which the first switch is in an on state and the second switch is in an off state, and the first switch And the third state in which both of the second switches are turned on are selected. When the first state is selected, when the second state is selected, and when the third state is selected, the potential of the pilot signal CPLT is changed due to the resistance value of the resistance circuit being different. The Therefore, CPU 202 changes the potential of pilot signal CPLT by selecting any one of the first state, the second state, and the third state. In the present embodiment, for example, when charging plug 410 is not connected to the inlet, CPU 202 selects the first state, charging plug 410 is connected to the inlet, and charging has started. If not, the second state is selected, and the third state is selected when charging is started. In addition, CPU202 selects a 2nd state, when complete | finishing charge. CPU 202 detects the rated current of charging cable 412 by detecting the oscillation state and duty cycle of pilot signal CPLT.

  Further, the CPU 202 changes the potential of the pilot signal CPLT by controlling the first switch and the second switch based on the oscillation state of the pilot signal CPLT. Thereby, the ECU 200 can remotely operate the CCID relay 12.

  In the present embodiment, for example, when the first state is selected, the potential of the pilot signal is changed to 12V, and when the second state is selected, the potential of the pilot signal CPLT is changed to 9V. By selecting the state, the potential of pilot signal CPLT is changed to 6V. When the potential of the pilot signal CPLT becomes 6V, the contact of the CCID relay 12 is closed, so that charging can be started. On the other hand, when the potential of pilot signal CPLT is 9V, the contact point of CCID relay 12 is opened, so that external power supply 400 and vehicle 1 are electrically disconnected.

  In vehicle 1 having the above-described configuration, timer charging that performs charging control so that charging of battery 70 is completed at the charging end time set by the user can be executed.

  In this timer charging, for example, when the charging plug 410 is connected to the inlet 110, the ECU 200 sets a timer for the purpose of power saving operation after the charging start time is set based on the state of the battery 70 and the charging end time. Only a function necessary for charging can be operated, and a transition is made to a standby state (hereinafter also referred to as a sleep state) in which other functions are stopped. Then, when the ECU 200 in the sleep state is activated at the charging start time, the charging start time is reset, and the difference between the current time and the reset charging start time is equal to or longer than a predetermined time (for example, about 10 minutes). When the operation to enter the sleep state is performed again and the difference between the current time and the reset charging start time is shorter than the predetermined time, the charging control is started. When setting the charging start time, the ECU 200 may remotely operate the CCID 10 so as to close the contact of the CCID relay 12 in order to obtain power supply information of the external power supply 400. The ECU 200 can obtain power supply information such as an alternating voltage (for example, 100 V or 200 V) and a rated current by closing the contact of the CCID relay 12.

  However, if the contact point of the CCID relay 12 is closed in order to obtain the power supply information of the external power source 400 every time the charging start time is set, it is necessary to close the contact point of the CCID relay 12 every time the charging start time is reset. Yes, the operation of closing the contact of the CCID relay 12 is repeatedly performed. Therefore, when the durability of the CCID relay 12 deteriorates, the charging cable 412 may deteriorate.

  Therefore, in the present embodiment, it is assumed that ECU 200 performs the following operation. That is, the ECU 200 stores the power supply information of the external power supply 400 acquired by bringing the CCID relay 12 into a conductive state when the charging cable 412 is connected to the vehicle 1. ECU 200 calculates the charging time required for battery 70 to be fully charged from the power supply information, the amount of charge required for battery 70 to be fully charged, and the temperature of battery 70. ECU 200 sets the charging start time by subtracting the charging time from the scheduled charging end time. ECU 200 shifts to a standby state until the set charging start time is reached. The ECU 200 updates the charging time from the stored power supply information, the amount of charge, and the temperature of the battery 70 while maintaining the CCID relay 12 in the cut-off state when the charging start time is reached during the standby state and the ECU 200 is restarted. To do. ECU 200 updates the charging start time by subtracting the updated charging time from the scheduled charging end time.

  In this way, the charging start time is updated based on the stored power supply information during standby, so that the CCID relay 12 can be maintained in the cutoff state. Therefore, since the operation of the CCID relay 12 is suppressed every time the charging start time is updated, deterioration of the durability of the CCID relay 12 can be suppressed. In the present embodiment, it is assumed that the outside air temperature is acquired as the temperature of battery 70.

  With reference to FIG. 2, a control process executed by ECU 200 that is the control device of the charging apparatus according to the present embodiment will be described.

  In step (hereinafter, step is referred to as S) 10, ECU 200 determines whether or not charging plug 410 is connected to inlet 110. ECU 200 determines whether or not charging plug 410 is connected to inlet 110 when receiving a signal via the PISW terminal as described above. If it is determined that charging plug 410 is connected to inlet 110 (YES in S10), the process proceeds to S12. If not (NO in S10), this process ends.

  In S12, ECU 200 shifts from the sleep state to the activated state. In S14, ECU 200 issues an ON command so that CCID relay 12 becomes conductive. Specifically, as described above, ECU 200 switches the first switch and the second switch of the built-in resistor circuit to lower the potential of pilot signal CPLT to the potential corresponding to the ON command for CCID relay 12.

  In S16, ECU 200 obtains the power supply information of external power supply 400 based on the AC voltage supplied when CCID relay 12 is turned on and the change in potential of pilot signal CPLT. ECU 200 acquires an AC voltage (for example, 100 V or 200 V) of external power supply 400 based on the voltage value detected by voltage sensor 304. ECU 200 further obtains a rated current from the pulse width of pilot signal CPLT. ECU 200 stores the acquired AC voltage and rated current in memory 204.

  In S18, ECU 200 calculates a charging start time. A method for calculating the charging start time will be described below.

  ECU 200 calculates the amount of charge required for battery 70 to be fully charged from the difference between the current SOC of battery 70 and the SOC corresponding to the fully charged state. ECU 200 calculates the current SOC based on the voltage, current, battery temperature, and the like of battery 70, for example. As a method for calculating the SOC, a known technique may be used, and a detailed description thereof will not be given.

  The ECU 200 calculates the charging time required until the fully charged state is reached based on the calculated charge amount. The charging time required to reach a fully charged state varies depending on the battery temperature even when the charge amount is constant. In the vehicle 1 that is left unattended, the battery temperature changes as the outside air temperature changes. Therefore, ECU 200 calculates a temporary charging time based on the current outside air temperature and the calculated charge amount.

  ECU 200 calculates the temporary charging time based on, for example, the relationship between the charging time and the outside air temperature shown in FIG. The vertical axis | shaft of FIG. 3 shows external temperature. The horizontal axis in FIG. 3 indicates the charging time. ECU 200 identifies an equal charge amount line indicated by a solid line in FIG. 3 from the calculated charge amount. The ECU 200 calculates a temporary charging time from the current outside air temperature detected by the outside air temperature sensor 206 and the specified equal charge amount curve. For example, when the current outside air temperature is Ta (0), ECU 200 calculates tc (0) as the temporary charging time. Alternatively, for example, the ECU 200 temporarily charges tc (1) when the current outside air temperature is Ta (1), and temporarily charges tc (2) when the current outside air temperature is Ta (2). Calculate as time. Note that the equal charge amount line indicated by the solid line in FIG. 3 is adapted by an experiment or the like and stored in the memory of the ECU 200 in advance.

  The ECU 200 calculates a temporary charging start time by subtracting the temporary charging time from the charging end time. The ECU 200 calculates a period between the current time and the temporary charging start time as a neglected period. The ECU 200 calculates an estimated value X (for example, a maximum value) of the amount of decrease in the outside air temperature from the current time, the outside air temperature at the current time and the leaving period to the provisional charging start time, and uses the calculated estimated value X. The estimated value of the outside air temperature at the temporary charging start time is calculated. The ECU 200 may calculate an estimated value of the outside temperature at the temporary charging start time using a map or the like from, for example, current year / month / date / time information, location information that can specify a region, or the like.

  The ECU 200 calculates the charging time at the calculated estimated value of the outside air temperature by a method similar to the method described with reference to FIG. 3, and the calculated charging time is the updated charging time (hereinafter referred to as updated charging time). To calculate). The ECU 200 subtracts the updated charging time from the charging end time to calculate an updated charging start time (hereinafter referred to as an updated charging start time). In S18, ECU 200 calculates this updated charge start time as the charge start time.

  In S20, ECU 200 determines whether or not a value obtained by subtracting the current time from the calculated charging start time is smaller than a predetermined time. As described above, the predetermined time is, for example, about 10 minutes. If it is determined that the value obtained by subtracting the current time from the charging start time is smaller than the predetermined time (YES in S20), the process proceeds to S22. If not (NO in S20), the process proceeds to S24.

  In S22, ECU 200 executes charge control. When the CCID relay 12 is in the off state, the ECU 200 controls the CCID 10 so that the potential of the pilot signal CPLT is lowered and the CCID relay 12 is in the on state.

  In S24, ECU 200 determines whether or not the number of restarts is a predetermined number or less. The predetermined number of times is described as being twice, for example, but is not particularly limited to three times. If it is determined that the number of restarts is equal to or less than the predetermined number (YES in S24), the process proceeds to S26. If not (NO in S24), the process proceeds to S22.

  In S26, ECU 200 issues an off command so that CCID relay 12 is in a cut-off state. ECU 200 maintains the cut-off state when CCID relay 12 is in the cut-off state.

  In S28, ECU 200 shifts from the activated state to the sleep state. In S30, ECU 200 determines whether or not the current time has passed the charging start time. If it is determined that the current time has passed the charging start time (YES in S30), the process proceeds to S32. If not (NO in S30), the process returns to S30, and the sleep state is continued until the charging start time elapses. In S32, ECU 200 returns the process to S18 after shifting from the sleep state to the activated state.

  The operation of ECU 200 that is the control device for the charging device according to the present embodiment based on the above-described structure and flowchart will be described with reference to FIGS. 4 and 5.

<When the number of restarts is less than the specified number>
For example, it is assumed that one end of charging cable 412 is connected to external power supply 400 and charging plug 410 at the other end of charging cable 412 is not connected to inlet 110. The charging end time is set by the user and stored in the ECU 200.

  Referring to FIG. 4, when the user connects charging plug 410 of charging cable 412 to inlet 110 at time t (0) (YES in S10), the operation state of ECU 200 changes from the sleep state to the activated state. Transitioned (S12). Then, at time t (1), the ECU 200 issues an ON command for the CCID relay 12 (S14), so that the CCID relay 12 is turned on. When the CCID relay 12 is turned on, the external power source 400 and the conversion device 300 are electrically connected. ECU 200 obtains an alternating voltage based on the detection result of voltage sensor 304, stores the obtained alternating voltage in memory 204, obtains a rated current from the pulse width of pilot signal CPLT, and obtains the obtained rated current. Store in the memory 204 (S16).

  Then, a charge start time (hereinafter referred to as an update charge start time (1)) is calculated based on the charge end time, the amount of charge until full charge and the outside air temperature (S18). The time from time t (3) to time t (7) in FIG. 4 indicates the charging time predicted when the cable is connected (hereinafter referred to as predicted charging time).

  When the value obtained by subtracting the current time from the update charging start time (1) is equal to or longer than the predetermined time (NO in S20) and the number of restarts is equal to or smaller than the predetermined number (YES in S24), time t (2) When the CCID relay 12 is instructed to be turned off (S26), the CCID relay 12 is turned off. Then, the operation state of the ECU 200 is shifted from the activated state to the sleep state (S28).

  Until the time t (3) is reached, the update charge start time (1) does not elapse (NO in S28), so the sleep state is continued. When updated charging start time (1) has elapsed at time t (3) (YES in S30), the operation state of ECU 200 is shifted from the sleep state to the activated state (S32).

  Then, the charging start time is calculated again (S18). Hereinafter, the charge start time calculated again is referred to as update charge start time (2). In addition, since the calculation method of update charge start time (2) is the same as the calculation method of update charge start time (1) mentioned above, the detailed description is not repeated. In addition, the time from the time t (5) of FIG. 4 to the time t (7) shows the estimated charging time at the update charging start time (1).

  When the value A obtained by subtracting the current time (update charge start time (1)) from the update charge start time (2) is equal to or greater than a predetermined time (NO in S20), and the number of restarts is equal to or less than the predetermined number (S24) In step S26), the CCID relay 12 off command is continued (S26), and at time t (4), the operation state of the ECU 200 is shifted from the activated state to the sleep state (S28).

  Until the time t (5) is reached, the update charge start time (2) does not elapse (NO in S28), so the sleep state is continued. When updated charging start time (2) has elapsed at time t (5) (YES in S30), the operation state of ECU 200 is shifted from the sleep state to the activated state (S32).

  Then, the charging start time is calculated again (S18). Hereinafter, the charge start time calculated again is referred to as an update charge start time (3). In addition, since the calculation method of update charge start time (3) is the same as the calculation method of update charge start time (1) mentioned above, the detailed description is not repeated. In addition, the time from the time t (5) of FIG. 4 to the time t (6) shows the estimated charging time at the update charging start time (2).

  When value B obtained by subtracting the current time from update charge start time (3) is smaller than a predetermined time (YES in S20), charge control is executed at time t (5) (S22). Charging is completed when the SOC of the battery 70 is fully charged at time t (6), and the charging end time is reached at time t (7).

<When the number of restarts is greater than the specified number>
For example, it is assumed that one end of charging cable 412 is connected to external power supply 400 and charging plug 410 at the other end of charging cable 412 is not connected to inlet 110. The charging end time is set by the user and stored in the ECU 200.

  Referring to FIG. 5, when the user connects charging plug 410 of charging cable 412 to inlet 110 at time t (10) (YES in S10), the operation state of ECU 200 changes from the sleep state to the activated state. Transitioned (S12). Then, at time t (11), ECU 200 issues an ON command for CCID relay 12 (S14), so that CCID relay 12 is turned on. When the CCID relay 12 is turned on, the external power source 400 and the conversion device 300 are electrically connected. ECU 200 obtains an alternating voltage based on the detection result of voltage sensor 304, stores the obtained alternating voltage in memory 204, obtains a rated current from the pulse width of pilot signal CPLT, and obtains the obtained rated current. Store in the memory 204 (S16).

  Then, a charge start time (hereinafter referred to as an update charge start time (1)) is calculated based on the charge end time, the amount of charge until full charge and the outside air temperature (S18). In addition, the time from the time t (13) of FIG. 5 to the time t (18) shows the estimated charging time at the time of cable connection.

  When the value obtained by subtracting the current time from the update charging start time (1) is equal to or longer than the predetermined time (NO in S20) and the number of restarts is equal to or smaller than the predetermined number (YES in S24), time t (12) When the CCID relay 12 is instructed to be turned off (S26), the CCID relay 12 is turned off. Then, the operation state of the ECU 200 is shifted from the activated state to the sleep state (S28).

  The updated charging start time (1) does not elapse until time t (13) (NO in S28), so the sleep state is continued. When updated charging start time (1) has elapsed at time t (13) (YES in S30), the operation state of ECU 200 is shifted from the sleep state to the activated state (S32).

  Then, the charging start time is calculated again (S18). Hereinafter, the charge start time calculated again is referred to as update charge start time (2). In addition, since the calculation method of update charge start time (2) is the same as the calculation method of update charge start time (1) mentioned above, the detailed description is not repeated. In addition, the time from the time t (15) of FIG. 5 to the time t (18) shows the estimated charging time at the update charging start time (1).

  When the value A obtained by subtracting the current time (update charge start time (1)) from the update charge start time (2) is equal to or greater than a predetermined time (NO in S20), and the number of restarts is equal to or less than the predetermined number (S24) At step S26, the operation state of the ECU 200 is shifted from the activated state to the sleep state (S28).

  Until the time t (15) is reached, the update charge start time (2) does not elapse (NO in S28), so the sleep state is continued. When updated charging start time (2) has elapsed at time t (15) (YES in S30), the operation state of ECU 200 is shifted from the sleep state to the activated state (S32).

  Then, the charging start time is calculated again (S18). Hereinafter, the charge start time calculated again is referred to as an update charge start time (3). In addition, since the calculation method of update charge start time (3) is the same as the calculation method of update charge start time (1) mentioned above, the detailed description is not repeated. In addition, the time from the time t (16) of FIG. 5 to the time t (18) shows the estimated charging time at the update charging start time (2).

  When the value B obtained by subtracting the current time from the update charge start time (3) is equal to or longer than the predetermined time (NO in S20) and the number of restarts is equal to or less than the predetermined number (YES in S24), the CCID relay 12 The off command is continued (S26), and at time t (14), the operation state of ECU 200 is shifted from the activated state to the sleep state (S28).

  Since the updated charging start time (3) does not elapse until time t (16) (NO in S28), the sleep state is continued. When updated charging start time (3) has elapsed at time t (16) (YES in S30), the operation state of ECU 200 is shifted from the sleep state to the activated state (S32).

  Then, the charging start time is calculated again (S18). Hereinafter, the charge start time calculated again is referred to as an update charge start time (4). In addition, since the calculation method of update charge start time (4) is the same as the calculation method of update charge start time (1) mentioned above, the detailed description is not repeated. In addition, the time from the time t (16) of FIG. 5 to the time t (17) shows the estimated charging time at the update charging start time (3).

  When the value C obtained by subtracting the current time from the update charge start time (4) is equal to or longer than the predetermined time (NO in S20), and the number of restarts (three times) is greater than the predetermined number (two). (NO in S24), charging control is executed at time t (16) (S22). Charging is completed when the SOC of the battery 70 is fully charged at time t (17), and charging end time is reached at time t (18).

  As described above, according to the charging device according to the present embodiment, the charging start time is updated based on the stored power supply information even when the charging is started during standby, so that the charging start time is updated. The CCID relay 12 can be maintained in the cutoff state. Therefore, since the operation of the CCID relay 12 is suppressed every time the charging start time is updated, deterioration of the durability of the CCID relay 12 can be suppressed. Therefore, it is possible to provide a charging device that suppresses deterioration of the charging cable.

  Further, when the number of restarts exceeds a predetermined number, a relay provided between ECU 200 and a power source that supplies electric power to ECU 200 when ECU 200 shifts from the sleep state to the start state by starting charging control. An increase in the number of operations of switches such as circuits can be suppressed.

Hereinafter, modifications will be described.
In the above-described embodiment, the vehicle 1 has been described as an electric vehicle. However, the vehicle 1 may be, for example, a hybrid vehicle having a motor generator and an engine as drive sources.

  In the above embodiment, the CCID relay 12 is turned on and the AC voltage is detected using the voltage sensor 304. For example, after the CCID relay 12 is turned on, the potential of the pilot signal CPLT changes. (For example, a change mode in which the potential is increased or decreased when the charging plug 410 is connected to the inlet 110, or a change mode in which the potential is constant when the charging plug 410 is connected to the inlet 110). You may make it notify whether it is 200V.

  In the above-described embodiment, the potential of the pilot signal CPLT for starting notification of the rated current is described as being different from the potential of the pilot signal CPLT for bringing the CCID relay 12 into a conducting state. There may be.

  In the above-described embodiment, it has been described that the standby ECU 200 restarts at the charge start time and updates the charge start time. However, for example, the standby after the charge plug 410 is connected to the inlet 110. In addition, the ECU 200 may update the charging start time each time a predetermined time elapses.

  In the above-described embodiment, the outside air temperature is described as being acquired as the temperature of the battery 70. For example, the temperature of the battery 70 may be acquired by directly detecting the temperature of the battery 70. An estimated value of the temperature of the battery 70 may be calculated based on the use history or the like, and the calculated estimated value may be acquired as the temperature of the battery 70.

In addition, you may implement combining the above-mentioned modification, all or one part.
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1 Vehicle, 10 CCID, 12 CCID Relay, 14 Control Circuit, 30 Power Line, 60 PCU, 70 Battery, 71 System Main Relay, 72 Charging Relay, 110 Inlet, 200 ECU, 206 Outside Air Temperature Sensor, 300 Conversion Device, 302 Power Conversion Part, 304 voltage sensor, 400 external power supply, 410 charging plug, 412 charging cable.

Claims (2)

A charging device for charging an in-vehicle power storage device with electric power supplied from an AC power supply outside the vehicle,
A conversion device provided in the vehicle and capable of converting AC power received from the AC power source into DC power and supplying the DC power to the power storage device;
One end is electrically connected to the AC power source, the other end is electrically connected to the converter, and a relay circuit provided on the power line between the one end and the other end is in a conductive state. A charging cable that outputs a signal indicating information of the AC power source to the vehicle when
An acquisition device for acquiring the temperature of the power storage device;
When the charging cable is connected to the vehicle, the power supply information of the AC power supply obtained by setting the relay circuit to the conductive state is stored, and the power supply information and the power storage device are fully charged. The charge start time is calculated by calculating the charge time required for the power storage device to reach the fully charged state from the amount of charge required until the power is reached and subtracting the charge time from the scheduled charge end time. And a control device that shifts to a standby state until the set charging start time,
The control device updates the charging time based on the stored power supply information, the amount of charge, and the temperature of the power storage device while maintaining the relay circuit in a cut-off state during standby, and ends the charging. Update the charging start time by subtracting the updated charging time from the scheduled time ,
The control device starts charging the power storage device without updating the charging time when the number of times of returning from the standby state to the activated state exceeds a predetermined number . A switch is provided between the control device and a power source that supplies power to the control device,
The charging device according to claim 1, wherein when the control device returns from the standby state to the activated state, the switch operates so that power can be supplied from the power source to the control device.

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