JP2016197960A - Charge control device and charge control method for secondary cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge control device, charging an electric vehicle of general-purpose AC power charge system from a power source located outside the vehicle, capable of achieving low installation and equipment cost by attaching an inverter for outputting DC power of a secondary cell as AC power with the power source taken as the secondary cell and connecting a charge path of an output of the inverter without laying a cable for power transmission like a commercial power supply, thus simplifying its configuration.SOLUTION: The charge control device for an electric vehicle, charging a secondary cell installed on the electric vehicle, includes: a secondary cell; an inverter for inverting DC power of an output of the secondary cell into AC power.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a charging control device and a charging control method for a secondary battery, and more particularly to a charging control device and a charging control method for charging a secondary battery mounted on an electric vehicle from a power source outside the vehicle.

  In recent years, electric vehicles (EV: Electric Vehicle) that run only with electric motors and plug-in hybrid vehicles (Plug-in Hybrid Vehicles) that can run with either engine or electric motors are attracting attention for the realization of a low-carbon society. Has been. Such an electric vehicle and a plug-in hybrid vehicle are provided with an electric motor for generating a driving force transmitted to the tire. The energy for driving the electric motor is supplied from a secondary battery provided in the vehicle. This secondary battery can be charged from the outside of the vehicle. Hereinafter, the electric vehicle or the plug-in hybrid vehicle that travels only by the electric motor is collectively referred to as an “electric vehicle”. Charging of the secondary battery mounted on the electric vehicle is performed by connecting a power supply connector provided in a power supply stand installed outside the vehicle to a vehicle-side connector provided in the vehicle.

  As described in Patent Document 1 (paragraph “0014”, see FIG. 1), a commercial power supply with AC (alternating current) 2 OOV output is generally used for the above-described power supply stand. To do so, an AC / DC converter that converts alternating current (AC) power to direct current (DC) power on the vehicle side is required. At present, a technique for charging the secondary battery on the vehicle side by converting the AC power of the commercial power source into DC power by an AC / DC converter provided on the vehicle side is widely used. In Patent Document 2 (paragraphs “0046” to “0048”, see FIG. 1), a solar panel 4, a storage battery 5, and an electric power system 6 (commercial power supply and estimation) are provided by a charger / discharger 3 provided outside the vehicle. The output power is converted into predetermined DC power by the DC / DC converter 11, the DC / DC converter 12, and the AC / DC converter 13, respectively, and the secondary battery of the electric vehicle 2 is charged. It is described.

  In Patent Document 1 and Patent Document 2, charging is performed by bringing an electric vehicle and a charging control device into electrical contact with each other, but as shown in Patent Document 3, using electromagnetic induction, Some charge the charging control device in an electrically non-contact state.

JP 2014-203516 A JP 2013-031348 A Japanese Patent Laid-Open No. 10-041170

  In order to charge a secondary battery mounted on an electric vehicle using a commercial power source, for example, laying of a power transmission cable for transmitting power to a power supply station described in Patent Document 1 or distribution of a power supply station Equipment must be installed, and depending on where the power supply stand is installed, expensive installation and installation costs may be required. In order to change to the DC power charging method as described in Patent Document 2, the vehicle-side charging facility is changed from a general AC power charging method to a DC power charging method, or a general AC power charging method is used. A charging facility that uses both a charging method and a special DC power charging method must be provided, which is a cost burden for the vehicle.

  Therefore, the present invention particularly provides a secondary battery in which the power source is a secondary battery in the configuration of the charge control device for charging a general-purpose AC power charging electric vehicle as described above from a power source outside the vehicle. An inverter for outputting the output DC power as AC power is provided, and the charging path of the output of the inverter is connected to the vehicle-side connector so that a power transmission cable is not laid like a commercial power supply. An object of the present invention is to provide a charging control device that can be installed at low cost because the configuration of the power distribution equipment is simple.

  In addition, a magnetic circuit unit is configured in the middle of the charging path of the inverter output, and the magnetic circuit unit is operated by a charging start signal during charging of the electric vehicle. When the charging of the secondary battery on the electric vehicle side is completed, the detection is performed. The magnetic sensor provided in the means senses that the operation of the magnetic circuit section has stopped, and the inverter power switch provided in the inverter is turned off to suppress the consumption of the secondary battery that supplies power to the inverter. An object is to provide a charge control device.

  In addition, the present invention provides a charge switch at the connector of the output end of the charge control device, and when the magnetic sensor senses that the operation of the magnetic circuit unit has stopped, the inverter power switch is turned off and the charge switch is also turned off. Thus, an object of the present invention is to provide a charge control device that further suppresses the consumption of a secondary battery that supplies power to an inverter so as to completely cut off the current output from the output end of the charge control device.

  Further, the present invention appropriately changes the shape, size, and performance (capacity, current value, voltage value, etc.) of the components (particularly, the magnetic circuit portion) of the control device for the electric vehicle described above, and the electric vehicle. Another object of the present invention is to provide a charge control device capable of performing charge control on secondary batteries in various technical fields in addition to secondary batteries used.

  In order to achieve the above object, in the electric vehicle charging control device of the present invention, the first feature is that a secondary battery and an inverter that converts the DC power of the output of the secondary battery into AC power are provided. To do.

  In the electric vehicle charging control apparatus of the present invention, an inverter power switch provided in the inverter, a magnetic circuit unit provided in a charging path of an output of the inverter, and sensing for detecting operation stop of the magnetic circuit unit And the magnetic circuit unit is operating during the charging operation of the electric vehicle by the secondary battery, and the operation of the magnetic circuit unit is stopped when the charging operation of the electric vehicle by the secondary battery is completed. A second feature of the present invention is that the sensing means senses the stop of the operation of the magnetic circuit unit and turns off the inverter power switch.

  Further, in the electric vehicle charging control device of the present invention, a charging switch is provided at an output end of the charging path of the inverter, the charging switch is in an on state while the magnetic circuit unit is in operation, and the sensing means is A third feature is that when the operation stop of the magnetic circuit unit is detected, it is turned off by a control signal from the detecting means.

  Further, in the electric vehicle charging control apparatus according to the present invention, the magnetic circuit unit is formed such that a part of the charging path of the inverter is formed as a coil, the coil is wound around an annular iron core, and a permanent magnet is attached to the annular iron core. During the charging of the electric vehicle, the magnetic sensor detects the magnetism by canceling out the magnetic field of the electromagnet composed of the coil and the annular iron core and the magnetic field of the permanent magnet. Without turning on the inverter power switch of the inverter, and when the charging of the electric vehicle is completed, the magnetic field of the electromagnet disappears, so that the magnetic sensor senses the magnetism of the permanent magnet, and the inverter The fourth feature is to turn off the power switch.

  Further, in the electric vehicle charging control device according to the present invention, during the charging of the electric vehicle, the magnetic force of the electromagnet composed of the coil and the annular iron core and the magnetic force of the permanent magnet cancel each other, so that the magnetic sensor If the inverter power switch and the charging switch are kept on without sensing magnetism, and the charging of the electric vehicle is completed, the magnetic force of the electromagnet disappears, and the magnetic sensor detects the magnetism of the permanent magnet. The fifth feature is that the inverter power switch and the charge switch are turned off by detecting the above.

  Further, in the charge control device of the present invention, a secondary battery, an inverter that converts DC power output from the secondary battery into AC power, an inverter power switch provided in the inverter, and charging of the output of the inverter A magnetic circuit unit provided in the path; and a sensing unit that senses stoppage of the operation of the magnetic circuit unit, and the magnetic circuit unit is operating during the charging operation by the secondary battery. When the charging operation ends, the operation of the magnetic circuit unit stops, and the sensing means senses the operation stop of the magnetic circuit unit and turns off an inverter power switch provided in the inverter. To do.

  In the charging control device of the present invention, a charging switch is provided at an output end of the charging path of the inverter, the charging switch is in an on state while the magnetic circuit unit is in operation, and the sensing means is the magnetic circuit. The second feature is that when the operation stop of the unit is sensed, it is turned off by the control signal from the sensing means.

  Further, in the charge control method of the present invention, the step of converting the DC power of the output of the secondary battery into AC power by the inverter and the AC power output operation of the inverter are completed, provided in the charging path of the output of the inverter. And detecting the end of the operation of the magnetic circuit unit and turning off the inverter power switch provided in the inverter.

  According to the present invention, in an electric vehicle charging control apparatus that charges a general-purpose AC power charging electric vehicle using a power source outside the vehicle, the power source is a secondary battery, and the DC power of the output of the secondary battery is Is provided as an AC power, and the charging path of the output of this inverter is connected to the vehicle-side connector, so that there is no need to install a power transmission cable as in the case of a commercial power supply. This configuration is also simple, and it is possible to achieve a remarkable effect that the conventional technology does not have, such that the installation cost of the charge control device can be reduced.

  According to the present invention, the magnetic circuit unit is configured in the middle of the charging path for the inverter output, and the magnetic circuit unit is operated by the charging start signal during charging of the electric vehicle. The magnetic sensor provided in the means senses that the operation of the magnetic circuit unit has stopped and turns off the inverter power switch of the inverter, thereby suppressing the consumption of the secondary battery that supplies power to the inverter. It is possible to achieve a remarkable effect that is not possible with the prior art.

  Further, according to the present invention, a charging switch is provided at an output end of the electric vehicle charging control device, and the magnetic sensor detects that the operation of the magnetic circuit unit has stopped, and the inverter power switch of the inverter is turned off. In addition, the charging switch is also turned off to cut off the current path between the electric vehicle charging control device and the electric vehicle, so that consumption of the secondary battery that supplies power to the inverter can be further suppressed. The remarkable effect which is not in the prior art can be produced.

  Further, according to the present invention, in the charging control device, the shape, size, and performance (capacity, current value, voltage value, etc.) of the components (particularly, the magnetic circuit unit) of the control device for the electric vehicle. It is possible to obtain a remarkable effect that is not possible in the prior art that charging can be controlled to secondary batteries in various technical fields in addition to secondary batteries for electric vehicles by appropriately changing.

It is a figure explaining the structure of the electric vehicle charge control apparatus of 1st embodiment of this invention. It is a figure explaining the structure of the electric vehicle charging control apparatus of 2nd embodiment of this invention. It is a figure explaining the magnetic circuit part of the electric vehicle charging control apparatus of 2nd embodiment of this invention. It is a figure explaining the structure of the electric vehicle charging control apparatus of 3rd embodiment of this invention.

  Hereinafter, the present invention will be described more specifically with reference to preferred embodiments. However, the following embodiment is merely an example embodying the present invention, and the present invention is not limited to this. In addition, the same code | symbol is attached | subjected to the common component.

[First embodiment]
In FIG. 1, the structure of the electric vehicle charge control apparatus of 1st embodiment of this invention is shown. As shown in FIG. 1, the electric vehicle charge control device 1 according to the first embodiment of the present invention includes a charge control device side secondary battery 2 and a charge control device side inverter connected to the charge control device side secondary battery 2. 3 and a charging cable 4 having one end connected to the output end of the charging control device side inverter 3 and the other end connected to the charging control device side connector 5.

  The charge control device side secondary battery 2 is a secondary battery composed of a lithium ion battery, a nickel metal hydride battery, a nickel zinc battery, or the like, and outputs DC (direct current) power. The charging control device side inverter 3 is a DC / AC converter that converts direct current (DC) power, which is an output of the charging control device side secondary battery 2, into alternating current (AC) power. Such a DC / AC converter is known as a power supply circuit that electrically generates AC power from DC power, a so-called inverter.

  The output of the charging control device side inverter 3 is a charging path to the electric vehicle 6, and is constituted by the charging cable 4. The charging control device side connector 5 is connected to the output end of the charging cable 4. The charging control device side connector 5 is connected to the vehicle side connector 7 of the electric vehicle 6, and the vehicle side two mounted on the electric vehicle 6 is connected. The secondary battery 9 can be charged.

  The electric vehicle 6 includes a vehicle-side charger 8 connected to the vehicle-side connector 7, a vehicle-side secondary battery 9 charged by the vehicle-side charger 8, and an output of the vehicle-side secondary battery 9 by converting the output of the motor 11. A vehicle-side inverter 10 that transmits to the vehicle, a vehicle-side control unit 12 that performs charging, running, braking, and other controls.

  The vehicle side secondary battery 9 is a secondary battery such as a lithium ion battery, a nickel metal hydride battery, or a nickel zinc battery. The vehicle-side inverter 10 converts the DC power output from the vehicle-side secondary battery 9 into AC power and supplies it to the electric motor 11 to drive the electric motor 11.

  As described above, the electric vehicle 6 may be an electric vehicle (EV vehicle) that runs only by the electric motor 11, and further, AC power output from the electric motor 11 is converted into DC electric power to convert the vehicle-side secondary battery 9. It may be a plug-in hybrid vehicle (PHV vehicle) that can be charged by the engine and driven by either the engine or the electric motor 11.

  As described above, the electric vehicle having such a configuration is general-purpose and well known to those skilled in the art.

  As described above, in the electric vehicle charging control device 1 according to the first embodiment of the present invention, the power source is a secondary battery, and the charging control device side inverter for outputting DC power of the output of the secondary battery as AC power. 3, and the charging control device side connector 5 connected to the charging cable 4 of the charging path of the output of the charging control device side inverter 3 is connected to the vehicle side connector 7. Since no power transmission cable is laid and the configuration of the power distribution equipment is simple, the installation cost of the charge control device can be reduced.

  Here, in the electric vehicle charging control device 1 of the first embodiment of the present invention, when charging of the electric vehicle 6 (charging of the vehicle-side secondary battery 9 mounted on the electric vehicle 6) is completed, a charging current flows. That is, it is assumed that the output current from the charging control device side inverter 3 does not flow through the charging cable 4 of the electric vehicle charging control device 1. However, since the charging control device side inverter 3 is always supplied with power from the charging control device side secondary battery 2, it is not necessary for the charging control device side inverter 3 itself even when the electric vehicle 6 is not charged. Current (current of about 2 A) continues to flow. Therefore, the consumption of the charge control device side secondary battery 2 that supplies power to the charge control device side inverter 3 is accelerated.

[Second Embodiment]
Therefore, in the electric vehicle charging control device 20 of the second embodiment of the present invention, when the electric vehicle 6 is not charged, the power supply of the charging control device side inverter 21 is turned off.

  In FIG. 2, the structure of the electric vehicle charge control apparatus 20 in 2nd embodiment of this invention is shown. In FIG. 3, the structure of the magnetic circuit part of the electric vehicle charge control apparatus 20 in 2nd embodiment of this invention is shown.

  As shown in FIG. 2, the electric vehicle charging control device 20 in the second embodiment of the present invention is different from the electric vehicle charging control device 1 in the first embodiment in that the charging path of the output of the charging control device side inverter 21 is as follows. The magnetic circuit unit 13 is provided in the middle of the operation, and the sensing unit 14 for sensing the operation stop of the magnetic circuit unit 13 is provided. The sensing unit 14 terminates the charging of the electric vehicle 6 and stops the operation of the magnetic circuit unit 13. , The charging control device side inverter power switch 21a provided in the charging control device side inverter 21 is turned off, and no unnecessary current flows through the charging control device side inverter 21 while the electric vehicle 6 is not charged. This is what I did.

  The output of the charging control device side inverter 21 is a charging path to the electric vehicle 6, and the magnetic circuit unit 13 is configured in the middle of the charging path. As shown in FIG. 3, the magnetic circuit unit 13 is configured such that a part of the charging cable 4 is a coil 13a, the coil 13a is wound around an annular iron core 13b, and a permanent magnet 13c is attached to the annular iron core 13b. I am doing. The coil 13a and the annular iron core 13b form an electromagnet 13d.

  When the electric vehicle 6 is not charged, no current is output from the charging control device side inverter 21, so no current flows through the charging cable 4, that is, the coil 13 b of the magnetic circuit unit 13, and the electromagnet 13 d does not operate as an electromagnet. Does not generate a magnetic field.

  While the electric vehicle 6 is being charged, a charging current is output from the charging control device side inverter 21, so that a current flows through the charging cable 4, that is, the coil 13 a, so that the electromagnet 13 d is excited and generates a magnetic field. Here, in order to cancel out the magnetic field generated by the permanent magnet 13c and the magnetic field generated by the electromagnet 13d during charging, the number of turns of the coil 13a, the coercive force of the permanent magnet 13c, The magnetic circuit unit 13 is configured by calculating the orientation and the like.

  Therefore, during the period when the charging current flows from the charging control device side inverter 21 to the vehicle side secondary battery 9 through the charging cable 4 during charging of the electric vehicle 6, the magnetic field generated by the excited electromagnet 13d Since the magnetic field of the permanent magnet 13c is canceled, the sensing means 14 provided with a magnetic sensor does not sense magnetism. The magnetic sensor is well known to those skilled in the art, and the specific circuit configuration of the sensing means 14 of the present invention using the known magnetic sensor can be easily implemented without needing to be described.

  Since the sensing means 14 is configured to turn on the inverter power switch 21a provided in the charging control device side inverter 21 when the magnetism is not sensed, the charging control device 14 is charged during the charging period of the electric vehicle 6. The inverter power switch 21a of the side inverter 21 is not turned off and remains on. That is, during the charging period of the electric vehicle 6, power is continuously supplied from the charging control device side secondary battery 2 to the charging control device side inverter 21 provided in the charging control device side inverter 21.

  When the charging of the electric vehicle 6 (vehicle-side secondary battery 9) is completed, the charging current from the charging control device-side inverter 21 does not flow, that is, no current flows through the coil 13a, so the electromagnet 13d is de-energized. Thus, the operation as an electromagnet is stopped, and the magnetic field generated by the electromagnet 13d is lost. Then, the magnetism of the permanent magnet 13c is sensed by the magnetic sensor provided in the sensing means 14, and the sensing means 14 transmits a charging end signal to the inverter power switch 21a provided in the charging control device side inverter 21, and this charging The inverter power switch 21 a that has received the end signal is turned off, the power supply from the charge control device side secondary battery 2 to the charge control device side inverter 21 is stopped, and no current flows through the charge control device side inverter 21.

  Here, when charging of the electric vehicle 6 is started, for example, a charging start operation of a user of the electric vehicle 6 is sensed, and a charging start signal generated by means (not shown) is transmitted to the magnetic circuit unit 13, the inverter power switch 21 a, and the electric vehicle 6. Transmitted to the automobile 6, the magnetic circuit unit 13 is turned on, the inverter power switch 21 a is turned on, and charging of the electric vehicle 6 is started.

  In the present invention, while the electric vehicle 6 is being charged, a charging current is output from the charging control device side inverter 21, a current flows through the coil 13 a, and the electromagnet 13 d is excited to operate as an electromagnet (a magnetic field is generated). This is defined as the operation of the magnetic circuit unit 13, the charging is completed, the charging current from the charging control device side inverter 21 is stopped, the current stops flowing through the coil 13a, and the electromagnet 13d is de-energized and operates as an electromagnet. The disappearance (the disappearance of the magnetic field) is defined as the operation stop of the magnetic circuit unit 13.

  Thus, while the electric vehicle 6 is being charged, a magnetic field generated by the electromagnet 13d when a current flows from the charging control device side inverter 21 to the charging cable 4, that is, the coil 13a, and a magnetic field generated by the permanent magnet 13 are generated. By canceling each other, the magnetic sensor provided in the sensing means 14 does not sense magnetism, and the ON state of the inverter power switch 21a provided in the charging control device side inverter 21 is maintained, and the charging of the electric vehicle 6 is completed. Then, since the magnetic field of the electromagnet 13d disappeared, the magnetic sensor provided in the sensing means 14 senses the magnetism of the permanent magnet 13c, and the inverter power switch 21a is turned off.

[Third embodiment]
In the electric vehicle charging control device 30 of the third embodiment of the present invention, the charging switch 31 is provided in the charging device side connector 5 in the electric vehicle charging control device 20 of the second embodiment. Is turned off to reliably cut off the charging current.

  In FIG. 4, the block diagram explaining the structure of the electric vehicle charge control apparatus 30 in 3rd embodiment of this invention is shown. The charging control device side connector 5 is provided with a charging switch 31 constituted by a known relay or the like. During charging of the vehicle-side secondary battery 9 of the electric vehicle 6, the inverter power switch 21 a is turned on and the charging switch 31 is turned on in the same manner as the electric vehicle charging control device 20 in the second embodiment. When the output current of the inverter 21 is supplied to the vehicle-side secondary battery 9 of the electric vehicle 6 via the charging control device-side connector 5 and the charging of the vehicle-side secondary battery 9 is finished, the sensing means 14 is connected to the magnetic circuit unit 13. When the inverter power supply switch 21a is turned off, the charging switch 31 is also turned off, and the electric vehicle charging control device 30 and the electric vehicle 6 are completely cut off electrically.

  The charging switch 21a is turned on by the charging start signal described in the electric vehicle charging control device 20 of the second embodiment. Further, the charging switch 21a is not limited to a known relay, but may be any known means having the same function.

[Fourth embodiment]
The electric vehicle charging control device has been described above as an example, but the charging control device according to the fourth embodiment of the present invention is not limited to an electric vehicle and can be used in various technical fields. Yes, using the configuration of the electric vehicle charging control device 1, 20, 30 of the first to third embodiments of the present invention, charging control according to the standard / configuration of the secondary battery for charging The shape, size, performance (capacity, current, voltage, etc.) of the components constituting the charge control device, such as the device side secondary battery, the charge control device side inverter, the magnetic circuit unit, the charging cable, the charge control device side connector, etc. May be changed as appropriate.

1, 20, 30 Electric vehicle charge control device 2 Charge control device side secondary battery,
3, 21 Charge control device side inverter 4 Charging cable 5 Charge control device side connector 6 Electric vehicle 7 Vehicle side connector 8 Vehicle side charger 9 Vehicle side secondary battery 10 Vehicle side inverter 11 Electric motor 12 Vehicle side control unit 13 Magnetic circuit unit 13a Coil 13b Annular iron core 13c Permanent magnet 13d Electromagnet 14 Sensing means 21a Inverter power switch 31 Charge switch

Claims (8)

An electric vehicle charging control device for charging a secondary battery mounted on an electric vehicle,
A secondary battery,
An electric vehicle charging control device comprising: an inverter that converts DC power output from the secondary battery into AC power. An inverter power switch provided in the inverter;
A magnetic circuit unit provided in the charging path of the output of the inverter;
Sensing means for sensing the operation stop of the magnetic circuit unit,
The magnetic circuit unit is operating during the charging operation of the electric vehicle by the secondary battery, and when the charging operation of the electric vehicle by the secondary battery is completed, the operation of the magnetic circuit unit is stopped, and the sensing means The electric vehicle charging control device according to claim 1, wherein when the operation stop of the magnetic circuit unit is detected, an inverter power switch provided in the inverter is turned off. A charging switch is provided at the output end of the charging path of the inverter,
The charge switch is in an on state while the magnetic circuit unit is in operation, and is turned off by a control signal from the sensing unit when the sensing unit senses that the magnetic circuit unit has stopped operating. Item 3. The electric vehicle charging control device according to Item 2. The magnetic circuit portion is configured such that a part of the charging path of the inverter is formed as a coil, the coil is wound around an annular iron core, and a permanent magnet is attached to the annular iron core,
During charging of the electric vehicle, the magnetic field of the electromagnet composed of the coil and the annular core and the magnetic field of the permanent magnet cancel each other, so that the magnetic sensor does not sense magnetism and the inverter power switch Keep on
3. When charging of the electric vehicle is completed, the magnetic field of the electromagnet disappears, so that the magnetic sensor senses the magnetism of the permanent magnet and turns off the inverter power switch. Item 4. The electric vehicle charging control device according to Item 3. During charging of the electric vehicle, the magnetic field of the electromagnet composed of the coil and the annular core and the magnetic field of the permanent magnet cancel each other, so that the magnetic sensor does not sense magnetism and the charging switch is turned on. Maintain state,
5. The electricity according to claim 4, wherein when the charging of the electric vehicle is finished, the magnetic sensor loses its magnetic field, so that the magnetic sensor senses the magnetism of the permanent magnet and turns off the charging switch. Automobile charging control device. A secondary battery,
An inverter that converts the DC power output from the secondary battery into AC power;
An inverter power switch provided on the inverter;
A magnetic circuit unit provided in the charging path of the output of the inverter;
Sensing means for sensing the operation stop of the magnetic circuit unit,
During the charging operation by the secondary battery, the magnetic circuit unit is operating, and when the charging operation by the secondary battery is completed, the operation of the magnetic circuit unit is stopped, and the sensing means operates the magnetic circuit unit. A charging control device that senses a stop and turns off an inverter power switch provided in the inverter. A charging switch is provided at the output end of the charging path of the inverter,
The charge switch is in an on state while the magnetic circuit unit is in operation, and is turned off by a control signal from the sensing unit when the sensing unit senses that the magnetic circuit unit has stopped operating. Item 7. The charge control device according to Item 6. Converting the DC power of the output of the secondary battery into AC power with an inverter;
Detecting that the operation of the magnetic circuit unit provided in the charging path for the output of the inverter is completed when the AC power output operation of the inverter is completed, and turning off the inverter power switch provided in the inverter; A charge control method comprising:

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