JP2008312401A - Charge system and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently charge each of batteries mounted on a plurality of electric vehicles by one power supply, even when commercial power source is used. <P>SOLUTION: The power supply 50 and each of the electric vehicles 10a, 10b, 10c are connected through a charging cable 52 and relay cables 16, 18. The batteries are charged in order for every electric vehicle by power from the power supply 50, toward a power supply 50 side from the electric vehicle 10c connected rearmost from the power supply 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for charging a battery provided in an electric vehicle such as an electric vehicle.

  The electric vehicle uses an electric motor that is driven by the supply of electric power from the battery as a power source. When the amount of charge of the battery is insufficient, the battery needs to be charged.

  For example, a power feeding device is used to charge the battery. The power feeding device includes a charging power source, a cable electrically connected to the charging power source, and a power feeding connector provided at a tip of the cable, and the power feeding connector is provided on the electric vehicle side. Is electrically connected to the battery, power from the charging power source is supplied to the battery, and the battery is charged.

  By the way, in the case of an electric vehicle provided with only a single charging connector, the battery of one electric vehicle can be charged with respect to one power feeding device. Therefore, when charging a plurality of electric vehicles with one power supply device, it is necessary to perform an operation of switching the connection of the cable each time the electric vehicle to be charged is switched.

  On the other hand, in Patent Document 1, two electric power supply / reception ports are provided in an electric vehicle, the two power supply / reception ports are connected in parallel between electrode terminals of a battery mounted in the vehicle, and one electric power supply / reception port is used as a power supply device. A technology is disclosed in which the other power receiving / feed port is connected to another electric vehicle and the batteries mounted on the two electric vehicles are simultaneously charged by one power feeding device.

Japanese Patent Laid-Open No. 10-117444

  According to the power supply device as in Patent Literature 1, it is possible to charge each battery mounted on a plurality of electric vehicles by one power supply device.

  However, since a battery mounted on an electric vehicle often has a relatively large capacity, when a battery is connected in parallel between the electrode terminals of the battery and charged simultaneously by a single power supply device, a power source having a high power supply voltage must be used. preferable. Therefore, for example, there is a possibility that a power supply voltage necessary for charging a plurality of batteries cannot be obtained sufficiently with a power supply voltage such as a commercial power supply used at home.

  An object of the present invention is to efficiently charge each battery mounted on a plurality of vehicles with one power source even when a commercial power source is used.

  A charging system according to the present invention is a charging system including a plurality of vehicles including a battery and a charging unit that is connected to the battery and an external power source and receives power supplied from the power source to charge the battery. The charging units are connected in parallel to the power source via cables, and the vehicles output a termination signal via the cable in response to completion of charging of the battery by the charging unit. In the case where the predetermined charging order is No. 1, in response to an external charging request, the charging unit is instructed to start charging, and when the charging order is not No. 1 The charging unit instructs the charging unit to start charging based on an end signal input from the other charging control unit via the cable, so that each charging unit sequentially receives a battery based on the charging order. Comprising a charging control unit that controls the charging unit to execute the charging, and wherein the.

  In one aspect of the charging system according to the present invention, when the charging order is not the first, the charging control unit is based on the own charging order and the number of times the end signal is received from another charging control unit. The charging unit is instructed to start charging.

  In one aspect of the charging system according to the present invention, the charging order is assigned in ascending order from the charging control unit corresponding to the last charging unit toward the previous stage, with the power source being the foremost stage. To do.

  In one aspect of the charging system according to the present invention, the power source is a three-phase AC power source, the number of vehicles is three or less, and each cable corresponds to each phase of the three-phase AC power source. Each of the charging control units is a power supply line constituting a cable connected to the three-phase AC power supply side and extending from power supply lines having different phases. If the cable is connected to the opposite side of the three-phase AC power source, and further connected to the neutral wire constituting the cable. It is characterized by that.

  In one aspect of the charging system according to the present invention, each charging control unit includes a switch that opens and closes the connection line, the switch and one end connected, and the neutral line and the other end connected to the three-phase AC power supply side. And when a cable is connected to the opposite side of the three-phase AC power source, a neutral wire constituting the opposite cable is provided at the one end of the current sensor. An end signal is output when the switch is turned on, and an end signal from another charge control unit is detected via the current sensor.

  In one aspect of the charging system according to the present invention, each of the charging control units is configured to perform self-based detection based on a current detected by its own current sensor in a state where each of the switches is turned on before instructing the start of charging. The charging order is determined.

  In one aspect of the charging system according to the present invention, each of the charging control units determines its own charging order based on a waveform of a current detected by its own current sensor.

  In one aspect of the charging system according to the present invention, the current sensor includes a photocoupler that is turned on when a predetermined amount of current from the three-phase AC power supply flows, and each of the charging control units includes a self-photographing unit. The charging sequence is determined based on the magnitude of the coupler ON rate.

  In one aspect of the charging system according to the present invention, each of the charging control units determines its own charging order as No. 1 when the ON rate is the first magnitude, and the ON rate is the first rate. In the case of the second size larger than 1, the self-charging order is determined as No. 2, and in the case where the ON rate is the third size larger than the second size, the self-charging is performed. It is characterized in that the order is determined as No. 3.

  A vehicle according to the present invention includes a battery, a charging unit that is connected to the battery and an external three-phase AC power supply, receives power supplied from the three-phase AC power supply, and charges the battery, and the charging control unit It is characterized by providing.

  According to the present invention, since each battery mounted on a plurality of vehicles is sequentially charged one by one, each battery can be efficiently charged even when a commercial power source is used.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment specifically showing the best mode for carrying out the invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram of the overall configuration of the charging system according to the present embodiment. In FIG. 1, a power source 50 is a commercial power source (for example, output voltage 100/200 V, frequency 50/60 Hz) of a three-phase AC power source system, and power from the power source 50 is passed through a three-phase four-wire charging cable 52. Output to the outside. Electric vehicles 10a, 10b, 10c (hereinafter referred to as “electric vehicle 10” when there is no need to distinguish each electric vehicle) are connected to power receiving port 12 and power receiving port 12 through a plurality of conductive wires. A power supply port 14 is provided, and power from the power supply 50 is input through the power receiving port 12. In addition, the electric vehicle 10 outputs the electric power input from the power receiving port 12 to the outside through the power supply port 14. The electric vehicle 10 is specifically an electric vehicle or a so-called plug-in hybrid electric vehicle capable of charging a battery with a commercial power source.

  As shown in FIG. 1, the power supply 50 and the electric vehicle 10 are connected via the charging cable 52 and the relay cables 16 and 18. More specifically, charging cable 52 extending from power supply 50 is connected to power receiving port 12a of electric vehicle 10a. Further, the power feeding port 14a of the electric vehicle 10a and the power receiving port 12b of the electric vehicle 10b are connected via the three-phase four-wire relay cable 16. Further, the power feeding port 14b of the electric vehicle 10b and the power receiving port 12c of the electric vehicle 10c are connected via a three-phase four-wire relay cable 18.

  In the present embodiment, the power source 50 and each electric vehicle 10 are connected via the charging cable 52 and the relay cables 16 and 18 as described above, and the electric vehicles are sequentially mounted on the electric vehicles by the electric power from the power source 50. Charge the charged battery. More specifically, in the present embodiment, when the power supply 50 is in the foremost stage, the electric vehicle 10c connected to the most rear side (that is, no other electric vehicle is connected to the rear stage side, and the power supply port The battery is charged for each electric vehicle in order from the electric vehicle not transmitting power to the other electric vehicle via the charging cable 52 from the power source 14 toward the front side that is the power source 50 side. The power source 50 is, for example, a commercial power source in the home. Moreover, what is necessary is just to combine the connection form as shown in FIG. 1 when charging the battery of three electric vehicles collectively. Moreover, although this embodiment demonstrates the example which connects three electric vehicles via each cable, as long as the number of electric vehicles is three or less, one or two may be sufficient.

  FIG. 2 is a diagram showing functional blocks of the charging system in the present embodiment.

  In FIG. 2, the power source 50 includes an R-phase line L1d, an S-phase line L2d, a T-phase line L3d, and a neutral line L4d, and each line is connected to a three-phase four-wire charging cable 52 via a power outlet 54. Connected to. A power feeding connector (not shown) is provided at the tip of the charging cable 52, and the charging cable 52 is connected to the power receiving port 12a of the electric vehicle 10a via the power feeding connector.

  Each electric vehicle 10 includes a battery 20 that supplies electric power to a motor as a power source, a charging unit 30 that charges the battery 20 with electric power from the power source 50, and a control unit 40 that controls charging of the battery 20 by the charging unit 30. A transmission side photocoupler 42 and a reception side photocoupler 44. The charging unit 30 converts the voltage of the input three-phase alternating current into a direct current, and charges the battery 20 with the direct current. Further, the control unit 40, the transmission side photocoupler 42, and the reception side photocoupler 44 constitute a charge control unit.

  Furthermore, each electric vehicle 10 includes a power receiving port 12 and a power feeding port 14, and the R phase line L <b> 1, the S phase line L <b> 2, the T phase line L <b> 3 and the neutrality of the power source 50 corresponding to each phase of the power source 50 from the power receiving port 12. Four neutral lines L4 corresponding to the points extend. Each phase line L1, L2, L3 branches into two to constitute a branch line LB and a main line LM. The branch line LB is connected to the charging unit 30, and the power of the power source 50 input from the power receiving port 12 is input to the charging unit 30 through the branch line LB. On the other hand, the main line LM is connected to the power supply port 14, and the power of the power source 50 input from the power reception port 12 reaches the power supply port 14 through the main line LM. The electric power output from the power supply port 14 is transmitted to the electric vehicle connected to the subsequent stage through the relay cable.

  Further, among the R-phase, S-phase, and T-phase lines L1, L2, and L3 constituting the main line LM, any one line (hereinafter referred to as line L) that is different for each electric vehicle, and a neutral line L4 is connected via a transmission-side photocoupler 42 that functions as a switch and a reception-side photocoupler 44 that functions as a current sensor. The transmission-side photocoupler 42 and the reception-side photocoupler 44 are composed of a photodiode and a phototransistor, and the line L is connected to the collector side of the phototransistor of the transmission-side photocoupler 42 (hereinafter referred to as a transmission-side phototransistor). . The emitter side of the transmission side phototransistor is connected to the anode side of the photodiode of the reception side photocoupler 44 (hereinafter referred to as reception side photodiode), and the neutral side L4 is connected to the cathode side of the reception side photodiode. Is connected.

  With this configuration, the transmission side phototransistor is turned on when a current flows through the photodiode of the transmission side photocoupler 42 based on an instruction from the control unit 40. In addition, when a current from the line L flows through the reception side photodiode, a rectangular wave corresponding to the current is output from the phototransistor of the reception side photocoupler 44, and a current signal corresponding to the output rectangular wave is generated. Input to the controller 40. The control unit 40 detects the current flowing through the reception-side photocoupler 44 based on the input current signal.

  Further, a line L5 extends from the branch point 43 between the emitter side of the transmission side phototransistor and the anode side of the reception side photodiode and reaches the power supply port 14. The line L5 is connected to the cathode side of the receiving side photodiode of the rear electric vehicle via the power supply port 14, the relay cable, and the power reception port of the rear electric vehicle.

  FIG. 3 is a diagram showing only a circuit including the power source 50 and the transmission side photocoupler 42 and the reception side photocoupler 44 of each electric vehicle in the charging system according to the present embodiment.

  As shown in FIG. 3, the power supply 50, the R-phase line L1, the transmission-side photocoupler 42a, the reception-side photocoupler 44a, and the neutral line L4 of the electric vehicle 10a form one closed circuit. Furthermore, the power supply 50, the S-phase line L2, the transmission-side photocoupler 42b of the electric vehicle 10b, the reception-side photocoupler 44b, the line L5a, the reception-side photocoupler 44a of the electric vehicle 10a, and the neutral line L4 are separate closed circuits. Is formed. In addition, the power source 50, the T-phase line L3, the transmission photocoupler 42c of the electric vehicle 10c, the reception photocoupler 44c, the line L5b, the reception photocoupler 44b of the electric vehicle 10b, the line L5a, and the reception photo of the electric vehicle 10a. A further closed circuit is formed by the coupler 44a and the neutral line L4.

  In the charging system configured as described above, in the present embodiment, first, the control unit 40 of each electric vehicle is charged according to the connection position of the electric vehicle so that charging is performed in order from the power source 50 in the order of distance. Determine the charging order of the vehicle.

  Here, a method for specifying the connection position of each electric vehicle will be described.

  As apparent from the circuit configuration shown in FIG. 3, when the transmission side photocoupler 42 of each electric vehicle is turned on, the reception side photocoupler 44 of the electric vehicle 10 c connected to the position farthest from the power supply 50 includes T An alternating current from the phase line L3 is supplied. Further, AC current from the T-phase line L3 and the S-phase line L2 is supplied to the reception-side photocoupler 44 of the electric vehicle 10b. Furthermore, the alternating current from the T-phase line L3, the S-phase line L2, and the R-phase line L1 is supplied to the reception-side photocoupler 44 of the electric vehicle 10a connected to the position closest to the power supply 50. That is, the current supplied to the reception-side photocoupler 44 of each electric vehicle varies depending on the connection position, and the ON rate of the reception-side photocoupler 44 also varies. Therefore, the control part 40 can specify the connection position of each electric vehicle 10 based on the magnitude | size of this ON rate.

  FIG. 4 is a time chart showing how the receiving-side photocoupler 44 of each electric vehicle is turned on / off. As described above, the AC current from all the R-phase, S-phase, and T-phase lines is supplied to the reception-side photocoupler 44a of the electric vehicle 10a, and the reception-side photocoupler 44a is always in an on state. Further, AC current from the S-phase line and the T-phase line is supplied to the reception-side photocoupler 44b of the electric vehicle 10b, and the reception-side photocoupler 44b is periodically turned on. More specifically, as shown in FIG. 5, when the previous turn-on time t1, the last turn-off time t2, and the current turn-on time t3, the on-rate f is obtained from the following equation (1). The ON rate f of the side photocoupler 44b is about 5/6.

  f = (t2-t1) / (t3-t1) (1)

  Further, an alternating current from the T-phase line is supplied to the reception-side photocoupler 44c of the electric vehicle 10c, and it is turned on for a shorter period of time than the reception-side photocoupler 44b. / 2.

  Therefore, the control unit 40 can specify the connection position of the electric vehicle based on the magnitude of the ON rate of the reception side photocoupler 44. That is, if the ON rate f is 1, the control unit 40 determines that the electric vehicle is most connected to the power supply 50 side. If the on-rate f is 5/6, the control unit 40 determines that the vehicle is connected to the middle stage. If the on-rate f is 1/2, the control unit 40 is connected to the last stage farthest from the power source 50. It is determined that the vehicle is an electric vehicle.

  FIG. 6 is a flowchart illustrating a processing procedure performed when the control unit 40 of each electric vehicle determines the charging order of the electric vehicle. For example, the control unit 40 determines the charging order in response to a cable connected to the power receiving port 12 or the power feeding port 14 or in response to an instruction from the user.

  In FIG. 6, the control unit 40 turns on the transmission side photocoupler 42 by flowing a current through the diode of the transmission side photocoupler 42 (S <b> 100). Thereafter, the control unit 40 calculates the on-rate f of the reception-side photocoupler 44 using the equation (1) (S102), and determines the charging order based on the on-rate f (S104). More specifically, the control unit 40 sets the charging order to “3” when the on-rate f is 1, and sets the charging order to “2” and the on-rate is 1 when the on-rate is 5/6. In the case of / 2, the charging order is determined as “1”. After the determination, the control unit 40 turns off the transmission side photocoupler 42 (S106).

  Next, the charging process performed by the control unit 40 after determining the charging order as described above will be described.

  After determining the charging order, the control unit 40 executes processing based on any one of the flowcharts shown in FIGS. 7A, 7B, and 7C according to the charging order. Hereinafter, the processing procedure of FIGS. 7A, 7B, and 7C will be individually described.

  FIG. 7A shows a processing procedure at the time of charging performed by the control unit 40 of the electric vehicle 10 in the charging order “1” (in the case of the connection configuration of FIG. 1, the electric vehicle 10c).

  In FIG. 7A, after determining the charging order, the control unit 40 outputs an instruction to start charging to the charging unit 30 (S200). After determining the charging order, the control unit 40 with the charging order “1” may output an instruction to start charging immediately to the charging unit 30, or after determining the charging order, It waits until it detects, and in response to detecting the request, an instruction to start charging may be output. In addition, the control unit 40 may detect the state of charge (SOC) of the battery and output a charge start instruction in response to the state of charge being smaller than a predetermined threshold.

  Thereafter, the control unit 40 determines whether or not the charging of the battery 20 by the charging unit 30 has been completed (S202). Note that the control unit 40 determines that the charging has ended even when the battery 20 is fully charged or the charging state of the battery 20 is greater than a predetermined threshold value and the charging unit 30 does not need to charge the battery 20. (The same applies to the charging orders “2” and “3”). As a result of the determination, when the control unit 40 detects that the charging of the battery 20 by the charging unit 30 has ended (the determination result of step S202 is affirmative “Y”), an end signal indicating the end of charging is sent via the line L5. Output to the preceding electric vehicle (S204). More specifically, the control unit 40 turns on the transmission side photocoupler 42 for a predetermined period. The front-stage control unit 40 can detect that the transmission-side photocoupler 42 on the rear-stage side is turned on by turning on the reception-side photocoupler 44 on the front-stage side.

  Next, based on FIG. 7B, a processing procedure at the time of charging performed by the control unit 40 of the electric vehicle with the charging order “2” (in the case of the connection configuration of FIG. 2, the electric vehicle 10 b) will be described.

  In FIG. 7B, first, the control unit 40 determines whether or not the charging of the electric vehicle having the charging order “1” has been completed (S300). When the control unit 40 detects that the reception-side photocoupler 44 is turned on once by the current input from the subsequent stage while the transmission-side photocoupler 42 is in the off state, the control unit 40 charges the electric vehicle with the charging order “1”. Is determined to have ended. As a result of the determination, if the charging of the electric vehicle with the charging order “1” has been completed, the control unit 40 outputs an instruction to start charging to the charging unit 30 (S302). Thereafter, the control unit 40 determines whether or not the charging of the battery 20 by the charging unit 30 has been completed (S304). As a result of the determination, when the control unit 40 detects that the charging of the battery 20 by the charging unit 30 is finished (the determination result of step S304 is affirmative “Y”), the control unit 40 turns on the transmission side photocoupler 42 for a predetermined period. The end signal is further output to the preceding electric vehicle via the line L5 (S306).

  Furthermore, FIG. 7C shows a processing procedure at the time of charging performed by the control unit 40 of the electric vehicle 10 in the charging order “3” (in the case of the connection configuration of FIG. 1, the electric vehicle 10a).

  In FIG. 7C, first, the control unit 40 determines whether or not the charging of the electric vehicles with the charging order “1” and the charging order “2” is completed (S400). When the control unit 40 detects that the reception-side photocoupler 44 is turned on twice by the current input from the subsequent stage while the transmission-side photocoupler 42 is in the off state, the charging order “1” and the charging order “2” It is determined that charging of the electric vehicle is completed. As a result of the determination, when the charging of the electric vehicle with the charging order “1” and the charging order “2” has been completed, that is, when the end signal is detected twice (the determination result of step S400 is affirmative “Y”), The control unit 40 outputs an instruction to start charging to the charging unit 30 (S402).

  As described above, the control unit 40 of each electric vehicle sequentially performs the charging process according to the connection position (charging order).

  According to the present embodiment, the batteries of up to three electric vehicles are charged one by one in order. Therefore, a power source having a relatively small capacity for power supply for charging the battery, for example, a household commercial power source can be used. In addition, when the connection position of each electric vehicle is specified or the control of the charging timing is performed via the three-phase four-wire cable used when supplying power from the power supply 50, the control unit 40 exchanges the information. An end signal can be transmitted. Therefore, it is not necessary to provide a separate control line or the like for each electric vehicle in order to communicate between the control units 40.

  In the present embodiment, one end (collector side) of the transmission side photocoupler 42 needs to be connected to lines of different phases in the three electric vehicles. However, in the electric vehicle constituting the charging system, one end of the transmission side photocoupler 42 is not necessarily connected to a line different from each other. Therefore, for example, each electric vehicle may be provided with a dip switch so that a line connected to one end of the transmission-side photocoupler 42 can be selected by setting the dip switch. With this configuration, for example, when configuring the charging system, the setting of the dip switch can be adjusted, and one end of the transmission-side photocoupler 42 can be connected to different lines.

It is a schematic diagram for demonstrating the whole structure of the charging system which concerns on this embodiment. It is a figure which shows the functional block of the charging system in this embodiment. It is a figure for demonstrating the structure of the circuit comprised by the power supply and the transmission side photocoupler and reception side photocoupler of each electric vehicle among the charging systems in this embodiment. It is a time chart which shows the mode of ON / OFF of the receiving side photocoupler of each electric vehicle at the time of specifying the connection position of each electric vehicle. It is a figure for demonstrating the calculation method of the ON rate of a receiving side photocoupler. It is a flowchart which shows the process sequence performed when a control part determines the charge order of an electric vehicle. It is a flowchart which shows the process sequence at the time of the charge which the control part of the electric vehicle connected to the position furthest away from the power supply performs. It is a flowchart which shows the process sequence at the time of the charge which the control part of the electric vehicle connected to the position 2nd away from the power supply performs. It is a flowchart which shows the process sequence at the time of the charge which the control part of the electric vehicle connected to the position nearest to a power supply performs.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Electric vehicle, 12 Power receiving port, 14 Power supply port, 16, 18 Relay cable, 20 Battery, 30 Charging part, 40 Control part, 42 Transmission side photocoupler, 44 Reception side photocoupler, 50 Power supply, 52 Charging cable.

Claims (10)

A charging system including a plurality of vehicles including a battery and a charging unit that is connected to the battery and an external power source and receives power from the power source to charge the battery,
Each charging unit is connected in parallel to the power source via a cable,
Each vehicle is
A charging control unit that outputs an end signal via the cable in response to the end of charging of the battery by the charging unit, and when the predetermined charging order is No. 1, charging from the outside In response to a request, the charging unit is instructed to start charging, and when the charging order is not the first, the charging unit A charging control unit that controls the charging unit such that each charging unit sequentially charges the battery one by one based on the charging order by instructing the start of charging to
A charging system characterized by that. The charging system according to claim 1,
The charge controller is
If the charging order of the self is not the first, based on the charging order of the self and the number of times of reception of the end signal from the other charging control unit, the charging unit is instructed to start charging.
A charging system characterized by that. The charging system according to claim 2,
The charging order is assigned in ascending order from the charging control unit corresponding to the charging unit at the last stage toward the front stage side, with the power source as the front stage.
A charging system characterized by that. The charging system according to claim 3,
The power source is a three-phase AC power source,
The number of vehicles is three or less,
Each cable includes three power lines corresponding to each phase of the three-phase AC power source and one neutral line,
Each of the charge control units is
A power supply line constituting a cable connected to the three-phase AC power supply side and extending from a power supply line having a different phase to each other; and a neutral line constituting the cable;
Furthermore, when a cable is connected to the opposite side to the three-phase AC power source, it is also connected to a neutral wire constituting the cable.
A charging system characterized by that. The charging system according to claim 4,
Each of the charge control units is
A switch that opens and closes the connection line, and includes a current sensor to which one end of the switch is connected and a neutral line and the other end of the three-phase AC power supply are connected.
When a cable is connected to the opposite side to the three-phase AC power supply, a neutral wire constituting the opposite cable is connected to the one end of the current sensor,
An end signal is output by turning on the switch, and an end signal from another charge control unit is detected via the current sensor.
A charging system characterized by that. The charging system according to claim 5, wherein
Each of the charge control units is
Before instructing the start of charging, based on the current detected by its own current sensor in the state where each of the switches is turned on, determine its own charging order.
A charging system characterized by that. The charging system according to claim 6,
Each of the charge control units is
Based on the current waveform detected by its own current sensor, determine its own charging order.
A charging system characterized by that. The charging system according to claim 7, wherein
The current sensor includes a photocoupler that is turned on when a predetermined amount of current from the three-phase AC power supply flows;
Each of the charge control units is
Based on the magnitude of the ON rate of its own photocoupler, determine its own charging order,
A charging system characterized by that. The charging system according to claim 8, wherein
Each of the charge control units is
When the on-rate is the first size, the self-charging order is determined as the first,
If the on-rate is a second magnitude greater than the first magnitude, the self-charging order is determined as No. 2,
If the ON rate is a third magnitude greater than the second magnitude, the self-charging order is determined to be No. 3.
Charging system characterized by that.   10. The battery according to claim 1, wherein the battery is connected to the battery and an external three-phase AC power source and receives power supplied from the three-phase AC power source to charge the battery. A vehicle including a charge control unit.

Images