JP5933348B2 - Charging system - Google Patents

Description

  The present invention relates to a charging system that can charge one or more electric vehicles (EV) or plug-in hybrid vehicles (PHV) using current supplied from a power source.

  There are two methods for charging an electric vehicle: quick charging and normal charging. Conventionally, as shown in FIG. 3, conventionally, as shown in FIG. 3, the current supplied from the power source P is supplied to each charger 10 </ b> X− as a slave unit according to the control of the control device (host or authentication unit) 1 </ b> X as the master unit. There is known a charging system that distributes 1 to 10X-n and charges one or more vehicles (electric vehicles) 100, 200. Since a contract current value (usable current value) is determined for the power supply P, the control device 1X uses the sum of the current values supplied from the chargers 10X-1 to 10X-n to the vehicles 100 and 200. The chargers 10X-1 to 10X-n are controlled according to the number of vehicles 100 and 200, etc. so as not to exceed the possible current value.

  In addition, in connection with such a charging system, the charging system described in patent document 1 is also known, for example.

JP 2011-78205 A

  However, the conventional technique requires the control device 1X as a parent device, and thus has a problem that the cost of the charging system is increased.

  Therefore, an object of the present invention is to provide a low-cost charging system that can charge a vehicle within a range of a usable current value of a power source.

A charging system according to an aspect of the present invention includes:
A plurality of chargers that are connected in common to a power source for which a usable current value is determined and that can charge the vehicle using the current supplied from the power source;
The vehicle includes a first power storage device and a first in-vehicle charger that receives a current that is equal to or less than a predetermined required current value and charges the first power storage device using the received current. Including a first type of vehicle having
Each charger is
A communication circuit capable of communicating with another charger among the plurality of chargers;
Connected between the charger connector connectable to the vehicle and the power source, and when the charging signal is not supplied, the charger connector and the power source are electrically opened, and the charging signal is supplied A charging control circuit for electrically connecting the charger connector and the power source;
A control circuit for notifying a current declaration value, which is a maximum current value to be supplied to the vehicle, to the other charger via the communication circuit, and controlling the charge control circuit;
The control circuit includes:
When the vehicle is connected to the charger connector and the connected vehicle is the first type vehicle, notification from the other charger via the communication circuit from the usable current value. It is determined whether or not a subtraction result obtained by subtracting the sum of the current declaration values is larger than the necessary current value,
When the subtraction result is larger than the required current value, the current declaration value is set to the required current value and then notified to the other charger, and then the charge signal is output to the charge control circuit to The charging of the first type vehicle is started.

In the charging system,
The vehicle is supplied from the outside with a second power storage device, a second in-vehicle charger that receives a current equal to or lower than an upper limit current value, and charges the second power storage device using the received current. A pilot circuit that sets the upper limit current value to be equal to or higher than a predetermined minimum required current value according to a pilot signal;
The control circuit of each charger is
When the connected vehicle is the second type vehicle, it is determined whether the subtraction result is greater than the minimum required current value;
If the subtraction result is greater than the minimum required current value, the current declaration value is set to the subtraction result or the rated current value of the charger and then notified to the other charger.
After the notification, the pilot signal is output to the second type vehicle, the upper limit current value is set to the current declaration value, and then the charge signal is output to the charge control circuit to output the second type. The vehicle may be charged.

In the charging system,
The control circuit of each charger is
When the connected vehicle is the second type of vehicle and the subtraction result is greater than the minimum required current value, it is determined whether or not the subtraction result is greater than or equal to the rated current value;
When the subtraction result is greater than or equal to the rated current value, the current declaration value is set to the rated current value,
When the subtraction result is smaller than the rated current value, the current declaration value may be set as the subtraction result.

In the charging system,
The control circuit of each charger is
After setting the current declaration value to the subtraction result or the rated current value and notifying the other charger, before starting charging the second type vehicle, the second type vehicle Determines whether or not it can receive current,
If the second type of vehicle can receive current, the pilot signal is output to the second type of vehicle to set the upper limit current value to the current declaration value, and then the charging signal is Output to the charge control circuit to start charging the second type of vehicle;
On the other hand, if the second type of vehicle is not capable of receiving current, it is determined whether or not the second type of vehicle is connected,
When the second type of vehicle is connected, the current declaration value is set to the minimum required current value and then notified to the other charger, and then the second type of vehicle is May be returned to the process of determining whether or not the power can be received.

In the charging system,
Each charger has a measurement circuit for measuring a supply current value supplied to the connected vehicle,
The control circuit of each charger is
When charging the first type of vehicle, the state where the supply current value is smaller than the current declaration value and is equal to or less than a predetermined current value near full charge continues for a predetermined first determination time. , Determine whether the charging is finished,
If charging has not ended, the current declaration value is decreased and then notified to the other charger,
On the other hand, while charging the second type of vehicle, it is determined whether or not the state where the supply current value is smaller than the upper limit current value has continued for a predetermined second determination time,
If it continues, the current declaration value is reduced to the supply current value and then notified to the other charger, and the pilot signal is output to the second type vehicle to set the upper limit current value to the The supply current value may be reduced.

In the charging system,
The control circuit of each charger is
When charging the second type of vehicle and the state where the supply current value is equal to the upper limit current value continues for the second determination time, it is determined whether the subtraction result is equal to or greater than the rated current value;
When the subtraction result is equal to or greater than the rated current value, the current declaration value is increased to the rated current value and then notified to the other charger, and the pilot signal is output to the second type vehicle. Then, the upper limit current value may be increased to the rated current value.

In the charging system,
The control circuit of each charger is
During charging of the second type vehicle, after the upper limit current value is decreased to the supply current value and after the upper limit current value is increased to the rated current value, it is determined whether or not charging is finished. ,
When the charging is not finished, the process may return to the process of determining whether or not the state where the supply current value is smaller than the upper limit current value has continued for the second determination time.

In the charging system,
The control circuit of each charger may notify the other chargers after setting the current declaration value to zero when charging is completed.

In the charging system,
The control circuit of each charger sets the current declaration value to zero when the subtraction result is less than the necessary current value and when the subtraction result is less than the minimum necessary current value, and then the other You may notify the charger.

A charging system according to an aspect of the present invention includes:
A plurality of chargers that are connected in common to a power source for which a usable current value is determined and that can charge the vehicle using the current supplied from the power source;
The vehicle receives a power storage device, a current equal to or lower than an upper limit current value, charges the power storage device using the received current, and the upper limit current value according to a pilot signal supplied from outside A pilot circuit that sets the current to a predetermined minimum required current value or more,
Each charger is
A communication circuit capable of communicating with another charger among the plurality of chargers;
Connected between the charger connector connectable to the vehicle and the power source, and when the charging signal is not supplied, the charger connector and the power source are electrically opened, and the charging signal is supplied A charging control circuit for electrically connecting the charger connector and the power source;
A control circuit for notifying a current declaration value, which is a maximum current value to be supplied to the vehicle, to the other charger via the communication circuit, and controlling the charge control circuit;
The control circuit includes:
When the vehicle is connected to the charger connector, a subtraction result obtained by subtracting a sum of current declaration values notified from the other charger via the communication circuit from the usable current value is the minimum required value. Judge whether it is larger than the current value,
When the subtraction result is larger than the minimum required current value, the current declaration value is set to the subtraction result or the rated current value of the charger and then notified to the other charger, and then the charging signal is It outputs to a charge control circuit, and the charge of the said vehicle is started.

  According to the present invention, the control circuit of each charger notifies the other charger of the current declaration value that is the maximum current value supplied to the vehicle. The connected vehicle is the first type vehicle, and the subtraction result obtained by subtracting the sum of the current declaration values notified from other chargers from the usable current value of the power source is the first type vehicle. When the current value is larger than the required current value, that is, when charging is possible, the current declaration value is set to the required current value and notified to the other chargers, and then charging of the first type vehicle is started.

  Thus, each charger can autonomously determine whether or not it is possible to charge the connected vehicle within the range of the usable current value of the power source. Therefore, since it is not necessary to use the master unit, it is possible to provide a low-cost charging system that can charge the vehicle within the range of the usable current value of the power source.

1 is a block diagram illustrating a schematic configuration of a charging system according to Embodiment 1. FIG. 3 is a flowchart illustrating processing of each charger of the charging system according to the first embodiment. It is a block diagram which shows the schematic structure of the conventional charging system.

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram illustrating a schematic configuration of the charging system according to the first embodiment. As shown in FIG. 1, the charging system includes a plurality of chargers 10-1 to 10-n (n is an integer of 2 or more) connected to a power source P in common.

  The power source P is, for example, a commercial AC power source of 100 V or 200 V, and a usable current value (contract current value) a is determined. The plurality of chargers 10-1 to 10-n are also referred to as charging stations, and are installed in a parking lot such as a store, for example, and can normally charge the vehicle using the current supplied from the power source P. That is, this charging system can charge one or more vehicles. The vehicle includes an electric vehicle (EV) and a plug-in hybrid vehicle (PHV).

  A charger connector 20 that can be connected to the vehicle is connected to each of the chargers 10-1 to 10-n. Each charger 10-1 to 10-n supplies electric current to the connected vehicle via the charger connector 20 to charge it.

  The charging system and the vehicle according to the present embodiment conform to international standard IEC61851 or SAEJ1772. In this standard, modes 1 to 3 relating to normal charging are defined.

  Vehicles to be charged by this charging system are mode 1 vehicles (first type vehicles) 100 corresponding to mode 1 and mode 2/3 vehicles (second type vehicles) corresponding to modes 2 or 3. 200.

  The mode 1 vehicle 100 includes a vehicle-side inlet 101 that can be connected to the charger connector 20, a main battery (first power storage device) 102 that is, for example, a battery, an in-vehicle charger (first in-vehicle charger) 103, Have

  Main battery 102 stores electric power for driving mode 1 vehicle 100. The on-vehicle charger 103 is an AC / DC converter, receives an alternating current of a required current value c1 or less determined in advance via the vehicle-side inlet 101, converts the received alternating current into a direct current, The main battery 102 is charged with a direct current. That is, in the mode 1 vehicle 100, the maximum value of the AC current to be received is fixed to the necessary current value c1, and this value cannot be controlled from the charger side.

  The mode 2/3 vehicle 200 includes a vehicle-side inlet 201 that can be connected to the charger connector 20, a main battery (second power storage device) 202 that is a battery, for example, and an in-vehicle charger (second in-vehicle charger) 203. And a control pilot circuit (pilot circuit) 204.

  Main battery 202 stores electric power for driving mode 2/3 vehicle 200. The on-vehicle charger 203 is an AC / DC converter that receives an alternating current having an upper limit current value g or less via the vehicle-side inlet 201 and converts the received alternating current into a direct current. The battery 202 is charged.

  The control pilot circuit 204 sets the upper limit current value g to be equal to or higher than a predetermined minimum required current value c2 in accordance with a control pilot signal (pilot signal) supplied from the outside via the vehicle-side inlet 201, and 203 is instructed. That is, in the mode 2/3 vehicle 200, the maximum value of the AC current to be received can be controlled by setting the upper limit current value g from the outside (charger side).

  Although the mode 1 vehicle 100 and the mode 2/3 vehicle 200 may be configured to be capable of rapid charging, the illustration and description of the configuration relating to rapid charging are omitted.

  Each of the chargers 10-1 to 10-n includes a communication circuit 11, a CPU (control circuit) 12, a storage device 13, a charge control circuit 14, and a measurement circuit 15.

  The communication circuit 11 is capable of wireless communication or wired communication with other chargers among the plurality of chargers 10-1 to 10-n. Thereby, the chargers 10-1 to 10-n form a local area network.

  The CPU 12 notifies the other battery charger of the current declaration value f, which is the maximum current value supplied to the connected vehicle, via the communication circuit 11, and the storage device 13, the charge control circuit 14, and the measurement circuit 15. Control. Detailed operation of the CPU 12 will be described later.

  The storage device 13 includes, for example, a RAM (Random Access Memory) and a ROM (Read Only Memory), and stores various types of information necessary for controlling charging under the control of the CPU 12. In the present embodiment, the storage device 13 includes a usable current value (contract current value) a [A], the number b [units] of the chargers 10-1 to 10-n connected to the same power source P, and a mode 1 vehicle. Required current value c1 [A] of 100, Minimum required current value c2 [A] of mode 2/3 vehicle 200, Rated current value d [A] that can be supplied by the charger (1 unit), Charger (1 unit) Supply current value e [A] supplied to the vehicle, current declaration value f [A], sum of current declaration values notified from other chargers Σf [A], CPLT upper limit current value g [ A], current value h [A] near full charge and limit margin value i [%] are stored. Hereinafter, each information is also simply referred to as a, b, c1, c2, d, e, f, Σf, g, h, i. Among these, the information a, b, c1, c2, d, h, i are predetermined fixed values, for example, a = 100 [A], b = n [unit], c1 = 16 [A]. , C2 = 8 [A], d = 20 [A]. Information e, f, Σf, and g are variable values that change according to the charging status.

  The charging control circuit 14 is connected between the charger connector 20 and the power source P. The charging control circuit 14 electrically opens the charger connector 20 and the power source P when the charging signal is not supplied from the CPU 12 so that the vehicle is not charged. On the other hand, the charging control circuit 14 electrically connects the charger connector 20 and the power source P when the charging signal is supplied from the CPU 12 so that the vehicle is charged.

  The measurement circuit 15 is connected between the charge control circuit 14 and the charger connector 20 and measures a supply current value e supplied to the connected vehicle.

  Next, the operation of this charging system will be specifically described with reference to FIG.

  FIG. 2 is a flowchart illustrating processing of each of the chargers 10-1 to 10-n of the charging system according to the first embodiment. That is, each of the chargers 10-1 to 10-n performs the processing shown in this flowchart independently. This flowchart is started when a charging process of one charger is activated by a user operation (for example, authentication) or the like.

  Each of the chargers 10-1 to 10-n is notified of the current declaration value notified by the CPU 12 every time another charger notifies the current declaration value f regardless of whether or not the charging process is being performed. f is stored in the storage device 13 in association with the notified charger.

  As shown in FIG. 2, first, the CPU 12 determines whether or not a vehicle is connected to the charger connector 20 (step S1). This determination method may be any method, for example, a method of determining that the vehicle is connected when a power supply voltage is applied to the charger connector 20 and a current is measured by the measurement circuit 15. When the vehicle is not connected (step S1; No), the process returns to step S1.

  If the vehicle is connected (step S1; Yes), the CPU 12 determines whether the usable current value a is larger than the sum Σf of the current declaration values notified from other chargers via the communication circuit 11; That is, it is determined whether or not a> Σf (step S2).

  If a> Σf is not satisfied (step S2; No), the CPU 12 determines that the service is not possible, sets the current declaration value f to zero, and notifies other chargers, that is, f = 0 [A]. To the other charger (step S26), and the process returns to step S1.

  On the other hand, if a> Σf (step S2; Yes), the CPU 12 determines whether or not the connected vehicle is the mode 1 vehicle 100 (step S3). As this determination method, for example, when the control pilot signal is transmitted to the vehicle via the charger connector 20 through the charger connector 20, and the voltage of the control pilot signal is not changed, the connected vehicle is A method for determining that the vehicle is the mode 1 vehicle 100 is given.

  When the connected vehicle is not the mode 1 vehicle 100 (step S3; No), the CPU 12 specifies that the connected vehicle is the mode 2/3 vehicle 200 (step S10), and after step S11 described later. Transition to processing.

[In the case of mode 1 vehicle 100]
When the connected vehicle is the mode 1 vehicle 100 (step S3; Yes), the subtraction which subtracted the sum total (SIGMA) f of the electric current declaration value notified from the other charger via the communication circuit 11 from the usable electric current value a. It is determined whether the result (a−Σf) is larger than the necessary current value c1 (= 16 [A]), that is, whether (a−Σf)> 16 [A] (step S4).

  If (a−Σf)> 16 [A] is not satisfied (step S4; No), the necessary current value c1 (= 16 [A]) necessary for charging the mode 1 vehicle 100 within the range of the usable current value a is calculated. Since it cannot be secured, after performing the process of step S26 described above, the process returns to step S1.

  On the other hand, when the subtraction result (a−Σf) is larger than the required current value c1 (= 16 [A]), that is, when (a−Σf)> 16 [A] (step S4; Yes), the CPU 12 The declaration value f is set to the necessary current value c1 and notified to the other chargers, that is, f = 16 [A] is notified to the other chargers, and then the charging signal is output to the charging control circuit 14 The charging of the mode 1 vehicle 100 is started (step S5). Specifically, the current from the power source P flows through the charge control circuit 14, the measurement circuit 15, and the charger connector 20 in this order, and is supplied to the mode 1 vehicle 100.

  As described above, the on-vehicle charger 103 of the mode 1 vehicle 100 receives an alternating current having a required current value c1 or less, and thus can be charged without exceeding the usable current a of the power source P.

  In this way, a certain charger notifies the other battery charger of the current declaration value f = 16 [A], and after this notification, the other charger has the current of this charger when the vehicle is connected. Considering the declared value f = 16 [A], the determination in step S2 or step S4 is performed.

  Next, after step S5, while the mode 12 vehicle 100 is being charged by the CPU 12, the supply current value e is smaller than the current declaration value f and is equal to or less than a predetermined current value h near full charge (ie, f). It is determined whether or not (a state where> e and h ≧ e) has continued for a predetermined first determination time T1 [minutes] (step S6). Since the supply current value e decreases as the charging of the main battery 102 proceeds, the current value h near full charge may be set to 2 [A], for example.

  When the state where f> e and h ≧ e is not continued for the first determination time T1 [minutes] (step S6; No), the process returns to step S6.

  On the other hand, when the state where f> e and h ≧ e continues for the first determination time T1 [minute] (step S6; Yes), the CPU 12 determines whether or not the charging is finished (step S7). Specifically, when the CPU 12 detects that the user has stopped charging by operating the charger or the mode 1 vehicle 100, or when the supply current value e is detected to be zero. What is necessary is just to determine with having completed charge.

  When charging is not finished (step S7; No), the CPU 12 notifies the other chargers after reducing the current declaration value f, that is, notifies f = 16 × i / 100 and the other chargers. (Step S8), the process returns to Step S6. The limit margin value i [%] is a predetermined value less than 100%. Thus, after this notification, other chargers can use the current that is no longer used by this charger if necessary.

  On the other hand, when charging is completed (step S7; Yes), the current declaration value f is set to zero and then notified to another charger, that is, f = 0 [A] is notified to the other charger (step S9). ), The process is terminated.

[In the case of mode 2/3 vehicle 200]
When the connected vehicle is the mode 2/3 vehicle 200 (step S10), whether or not the subtraction result (a−Σf) is larger than the minimum required current value c2 (= 6 [A]) by the CPU 12 is determined. That is, it is determined whether (a−Σf)> 6 [A] is satisfied (step S11).

  If (a−Σf)> 6 [A] is not satisfied (step S11; No), the minimum required current value c2 necessary for charging the mode 2/3 vehicle 200 cannot be secured within the range of the usable current value a. After performing the process of step S26 described above, the process returns to step S1.

  On the other hand, if (a−Σf)> 6 [A] (step S11; Yes), the CPU 12 determines whether or not the subtraction result (a−Σf) is equal to or greater than the rated current value d, that is, (a−Σf) ≧ d. It is determined whether it is [A] (step S12).

  When (a−Σf) ≧ d [A] (step S12; Yes), the CPU 12 sets the current declaration value f to the rated current value d and notifies the other chargers, that is, f = d. The other charger is notified (step S13), and the process proceeds to step S15.

  On the other hand, if (a−Σf) ≧ d [A] is not satisfied (step S12; No), the CPU 12 sets the current declaration value f to the subtraction result (a−Σf) and notifies the other chargers, That is, f = (a−Σf) is notified to another charger (step S14), and the process proceeds to step S15.

  In this way, the current declaration value f is set to a value larger than the minimum necessary current value c2 (= 6 [A]) and not more than the rated current value d.

  In step S15, the CPU 12 determines whether or not the connected mode 2/3 vehicle 200 can receive current, that is, whether or not the mode 2/3 vehicle 200 is in the states C and D. States C and D are defined in the aforementioned standard. As this determination method, for example, there is a method for determining whether or not the amplitude of the PWM waveform of the control pilot signal has changed, as defined in the aforementioned standard.

  When the mode 2/3 vehicle 200 cannot receive current (step S15; No), it is determined whether or not the mode 2/3 vehicle 200 is in the state B connected to the charger connector 20 (step S24). . The state B and the determination method for the state B are also defined in the above-mentioned standard.

  When the mode 2/3 vehicle 200 is in the state B (step S24; Yes), it is determined that the mode 2/3 vehicle 200 is waiting, and the CPU 12 sets the current declaration value f to the minimum necessary current value c2. The other charger is notified above (step S25). That is, f = 6 [A] is notified to another charger. Thereafter, the process returns to step S15. Thereby, it can stand by in the state which can be charged by 6 [A] according to the request | requirement of the mode 2/3 vehicle 200 side. As an example of performing the process of step S25, a case where the user sets the mode 2/3 vehicle 200 to the timer charging mode can be considered. When the set time is reached and the mode 2/3 vehicle 200 is in a state C or D in which the current can be received, 6 [A] secured by the processing after step S16 described below is secured. Charging can be started using the current.

  On the other hand, when the mode 2/3 vehicle 200 is not in the state B (step S24; No), after performing the process of the above-described step S26, the process returns to step S1.

  When the connected mode 2/3 vehicle 200 can receive current in step S15 (step S15; Yes), the CPU 12 outputs a control pilot signal to the mode 2/3 vehicle 200 using the charging control circuit 14. Then, the upper limit current value g is set to the current declaration value f, that is, g is set to f = f, and then the charge signal is output to the charge control circuit 14 to start charging the mode 2/3 vehicle 200 (step S16). ).

  Specifically, the charge control circuit 14 generates a control pilot signal having a duty ratio corresponding to the upper limit current value g, and outputs the control pilot signal to the mode 2/3 vehicle 200 via the charger connector 20.

  The control pilot signal is supplied to the control pilot circuit 204 via the vehicle side inlet 201 of the mode 2/3 vehicle 200. The control pilot circuit 204 obtains an upper limit current value g corresponding to the duty ratio of the supplied control pilot signal. As described above, the in-vehicle charger 203 of the mode 2/3 vehicle 200 receives an alternating current having an upper limit current value g or less, and thus can be charged without exceeding the usable current a of the power source P.

  After step S16, the CPU 12 determines whether or not the state where the supply current value e is smaller than the upper limit current value g, that is, the state where g> e has continued for a predetermined second determination time T2 [minutes] (step S16). S17).

  When the state of g> e continues for the second determination time T2 [minute] (step S17; Yes), the current declaration value f is reduced to the supply current value e and then notified to other chargers, and the control pilot A signal is output to the mode 2/3 vehicle 200 to reduce the upper limit current value g to the supply current value e (step S18), and the process proceeds to step S22. Thus, after this notification, other chargers can use the current that is no longer used by this charger if necessary.

  On the other hand, when the state of g> e does not continue for the second determination time T2 [minute] (step S17; No), the state where the supply current value e is equal to the upper limit current value g, that is, the state where g = e is the second. It is determined whether or not the determination time T2 [minutes] has continued (step S19).

  When the state of g = e does not continue for the second determination time T2 [minutes] (step S19; No), the process returns to step S1 after performing the process of step S26 described above.

  When the state of g = e continues for the second determination time T2 [minute] (step S19; Yes), whether or not the subtraction result (a−Σf) is equal to or greater than the rated current value d, that is, (a−Σf) ≧ d. It is determined whether or not there is (step S20).

  When (a−Σf) ≧ d (step S20; Yes), the current declaration value f is increased to the rated current value d and notified to other chargers, and the control pilot signal is sent to the mode 2/3 vehicle. 200, the upper limit current value g is increased to the rated current value d (step S21), and the process proceeds to step S22. Thus, when the subtraction result (a−Σf) is smaller than the rated current value d in step S12 described above and charging is started as f = (a−Σf), or when f = 6 [A] is set in step S25 by timer charging. When charging is started, if the subtraction result (a−Σf) increases to the rated current value d or more during charging, the upper limit current value g (= current declaration value f) may be increased to the rated current value d. it can.

  On the other hand, if (a−Σf) ≧ d is not satisfied (step S20; No), the current declaration value f cannot be increased to the rated current value d within the range of the usable current value a. To do.

  In step S22, it is determined whether or not the charging is completed in the same manner as in step S7. If charging has not ended (step S22; No), the process returns to step S17.

  On the other hand, when charging is completed (step S22; Yes), the current declaration value f is set to zero and then notified to another charger, that is, f = 0 [A] is notified to the other charger (step S23). ), The process is terminated.

  As described above, according to the present embodiment, the CPU 12 of each of the chargers 10-1 to 10-n notifies the other chargers of the current declaration value f that is the maximum current value supplied to the vehicle. . The connected vehicle is the mode 1 vehicle 100, and the subtraction result (a−Σf) obtained by subtracting the sum Σf of the current declaration value notified from the other charger from the usable current value a of the power source P is the mode. When the current value c1 is larger than the required current value c1 of the vehicle 100, that is, when charging is possible, the current declaration value f is set to the required current value c1 and notified to other chargers. Start charging.

  When the connected vehicle is the mode 2/3 vehicle 200 and the subtraction result (a−Σf) is larger than the minimum required current value c2 of the mode 2/3 vehicle 200, that is, when charging is possible, the current declaration value f Is set to the subtraction result (a−Σf) or the rated current value d of the charger and then notified to other chargers. After the notification, the upper limit current value g is set to the current declaration value f, and then the mode 2 / 3 Charging of the vehicle 200 is started.

  In this way, each of the chargers 10-1 to 10-n can autonomously determine whether or not the vehicle connected within the range of the usable current value a of the power source P can be charged. Therefore, since it is not necessary to use the master unit, a small and low-cost charging system that can charge the vehicle within the range of the usable current value a of the power source P can be provided.

  Furthermore, according to the present embodiment, the CPU 12 of each of the chargers 10-1 to 10-n determines the current declaration value f when the state where the supply current value e is less than the current declaration value f continues while charging the vehicle. After that, the other current charger can use the reduced current without exceeding the usable current value a.

  Further, the CPU 12 of each of the chargers 10-1 to 10-n continues the state in which the supply current value e is equal to the current declaration value f while charging the mode 2/3 vehicle 200, and the subtraction result (a−Σf ) Is equal to or greater than the rated current value d, the current declaration value f is increased, and thereafter, the charging of the mode 2/3 vehicle 200 can be speeded up without exceeding the usable current value a.

  In this way, the current from the power source P can be redistributed to the required chargers within the range of the usable current value a without waiting for the end of charging of the vehicle. Therefore, the vehicle can be charged efficiently.

(Modification)
As mentioned above, although the Example of this invention was explained in full detail, a concrete structure is not limited to the said Example, A various deformation | transformation can be implemented in the range which does not deviate from the summary of this invention.

  For example, the charging system may be configured to charge only the mode 1 vehicle 100 or may be configured to charge only the mode 2/3 vehicle 200. Thereby, since the process of CPU12 can be simplified, it can further reduce cost.

  At least a part of the charging system described in the above-described embodiments may be configured by hardware or software. When configured by software, a program for realizing at least a part of the functions of the charging system may be stored in a recording medium such as a flexible disk or a CD-ROM, and read and executed by a computer. The recording medium is not limited to a removable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.

  Further, a program for realizing at least a part of the functions of the charging system may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program may be distributed in a state where the program is encrypted, modulated or compressed, and stored in a recording medium via a wired line such as the Internet or a wireless line.

P power supply 10-1 to 10-n charger 11 communication circuit 12 CPU (control circuit)
13 storage device 14 charge control circuit 15 measurement circuit 20 charger connector 100 mode 1 vehicle 101 vehicle side inlet 102 main battery (first power storage device)
103 In-vehicle charger (first in-vehicle charger)
200 mode 2/3 vehicle 201 vehicle side inlet 202 main battery (second power storage device)
203 On-vehicle charger (second on-vehicle charger)
204 Control pilot circuit (pilot circuit)

Claims (8)

A plurality of chargers that are connected in common to a power source for which a usable current value is determined and that can charge the vehicle using the current supplied from the power source;
The vehicle includes a first power storage device and a first in-vehicle charger that receives a current that is equal to or less than a predetermined required current value and charges the first power storage device using the received current. Including a first type of vehicle having
Each charger is
A communication circuit capable of communicating with another charger among the plurality of chargers;
Connected between the charger connector connectable to the vehicle and the power source, and when the charging signal is not supplied, the charger connector and the power source are electrically opened, and the charging signal is supplied A charging control circuit for electrically connecting the charger connector and the power source;
A control circuit for notifying a current declaration value, which is a maximum current value to be supplied to the vehicle, to the other charger via the communication circuit, and controlling the charge control circuit;
The control circuit includes:
When the vehicle is connected to the charger connector and the connected vehicle is the first type vehicle, notification from the other charger via the communication circuit from the usable current value. It is determined whether or not a subtraction result obtained by subtracting the sum of the current declaration values is larger than the necessary current value,
When the subtraction result is larger than the required current value, the current declaration value is set to the required current value and then notified to the other charger, and then the charge signal is output to the charge control circuit to To start charging the first type of vehicle ,
The vehicle is supplied from the outside with a second power storage device, a second in-vehicle charger that receives a current equal to or lower than an upper limit current value, and charges the second power storage device using the received current. A pilot circuit that sets the upper limit current value to be equal to or higher than a predetermined minimum required current value according to a pilot signal;
The control circuit of each charger is
When the connected vehicle is the second type vehicle, it is determined whether the subtraction result is greater than the minimum required current value;
If the subtraction result is greater than the minimum required current value, the current declaration value is set to the subtraction result or the rated current value of the charger and then notified to the other charger.
After the notification, the pilot signal is output to the second type vehicle, the upper limit current value is set to the current declaration value, and then the charge signal is output to the charge control circuit to output the second type. To start charging your vehicle,
The control circuit of each charger is
After setting the current declaration value to the subtraction result or the rated current value and notifying the other charger, before starting charging the second type vehicle, the second type vehicle Determines whether or not it can receive current,
If the second type of vehicle can receive current, the pilot signal is output to the second type of vehicle to set the upper limit current value to the current declaration value, and then the charging signal is Output to the charge control circuit to start charging the second type of vehicle;
On the other hand, if the second type of vehicle is not capable of receiving current, it is determined whether or not the second type of vehicle is connected,
When the second type of vehicle is connected, the current declaration value is set to the minimum required current value and then notified to the other charger, and then the second type of vehicle is The charging system is characterized by returning to the process of determining whether or not the power can be received . The control circuit of each charger is
When the connected vehicle is the second type of vehicle and the subtraction result is greater than the minimum required current value, it is determined whether or not the subtraction result is greater than or equal to the rated current value;
When the subtraction result is greater than or equal to the rated current value, the current declaration value is set to the rated current value,
The charging system of claim 1, wherein the subtraction result is smaller than the rated current value, and sets the current declared value to the subtraction result. Each charger has a measurement circuit for measuring a supply current value supplied to the connected vehicle,
The control circuit of each charger is
When charging the first type of vehicle, the state where the supply current value is smaller than the current declaration value and is equal to or less than a predetermined current value near full charge continues for a predetermined first determination time. , Determine whether the charging is finished,
If charging has not been completed, the current declaration value is decreased and then notified to the other charger. On the other hand, while charging the second type vehicle, the supply current value is greater than the upper limit current value. It is determined whether the small state has continued for a predetermined second determination time,
If it continues, the current declaration value is reduced to the supply current value and then notified to the other charger, and the pilot signal is output to the second type vehicle to set the upper limit current value to the the charging system according to claim 2 to reduce the supply current value of claims 1 you characterized. The control circuit of each charger is
When charging the second type of vehicle and the state where the supply current value is equal to the upper limit current value continues for the second determination time, it is determined whether the subtraction result is equal to or greater than the rated current value;
When the subtraction result is equal to or greater than the rated current value, the current declaration value is increased to the rated current value and then notified to the other charger, and the pilot signal is output to the second type vehicle. The charging system according to claim 3 , wherein the upper limit current value is increased to the rated current value. The control circuit of each charger is
During charging of the second type vehicle, after the upper limit current value is decreased to the supply current value and after the upper limit current value is increased to the rated current value, it is determined whether or not charging is finished. ,
5. The charging system according to claim 4 , wherein when charging is not completed, the process returns to the process of determining whether or not the state where the supply current value is smaller than the upper limit current value continues for the second determination time. The control circuit of each of the chargers, when charging is completed, sets the current declaration value to zero and notifies the other chargers of any one of claims 3 to 5 . The charging system described in. The control circuit of each charger sets the current declaration value to zero when the subtraction result is less than the necessary current value and when the subtraction result is less than the minimum necessary current value, and then the other The charging system according to any one of claims 1 to 6 , wherein the charger is notified. A plurality of chargers that are connected in common to a power source for which a usable current value is determined and that can charge the vehicle using the current supplied from the power source;
The vehicle receives a power storage device, a current equal to or lower than an upper limit current value, charges the power storage device using the received current, and the upper limit current value according to a pilot signal supplied from outside A pilot circuit that sets the current to a predetermined minimum required current value or more,
Each charger is
A communication circuit capable of communicating with another charger among the plurality of chargers;
Connected between the charger connector connectable to the vehicle and the power source, and when the charging signal is not supplied, the charger connector and the power source are electrically opened, and the charging signal is supplied A charging control circuit for electrically connecting the charger connector and the power source;
A control circuit for notifying a current declaration value, which is a maximum current value to be supplied to the vehicle, to the other charger via the communication circuit, and controlling the charge control circuit;
The control circuit includes:
When the vehicle is connected to the charger connector, a subtraction result obtained by subtracting a sum of current declaration values notified from the other charger via the communication circuit from the usable current value is the minimum required value. Judge whether it is larger than the current value,
When the subtraction result is larger than the minimum required current value, the current declaration value is set to the subtraction result or the rated current value of the charger and then notified to the other charger, and then the charging signal is Output to the charge control circuit to start charging the vehicle ,
The control circuit of each charger is
After the notification, the pilot signal is output to the vehicle to set the upper limit current value to the current declaration value, and then the charging signal is output to the charge control circuit to start charging the vehicle. Yes,
The control circuit of each charger is
After setting the current declaration value to the subtraction result or the rated current value and notifying the other charger, before starting charging the vehicle, it is determined whether or not the vehicle can receive current. ,
When the vehicle is capable of receiving current, the pilot signal is output to the vehicle, the upper limit current value is set to the current declaration value, and then the charging signal is output to the charging control circuit. Start charging,
On the other hand, if the vehicle is not capable of receiving current, determine whether the vehicle is connected,
When the vehicle is connected, the current declaration value is set to the minimum required current value and then notified to the other charger, and then the process determines whether the vehicle can receive current. Charging system characterized by returning .

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