JP2013240206A - Shared charger of plug-in charging and non-contact power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shared charger of plug-in charging and non-contact power supply in which the required number of breakers is reduced, breaker operation is simplified, risk of wrong operation is eliminated, and a required in-vehicle space can be reduced by omitting an AC charger or a DC charger.SOLUTION: The shared charger of plug-in charging and non-contact power supply includes a single DC charger 12 which converts the DC current of first voltage V1 into a charging current for in-vehicle battery 9, a single in-vehicle breaker 13 located between the DC charger 12 and the in-vehicle battery 9 and capable of interrupting therebetween, a first conversion circuit 14 for plug-in charging, and a second conversion circuit 16 for non-contact power supply. The first conversion circuit 14 converts an AC current of second voltage V2 supplied via a charging socket 4a into a DC current of first voltage V1. The second conversion circuit 16 converts an AC current of a third voltage V3 supplied via a power-receiving coil 4b into a DC current of first voltage V1.

Description

  The present invention relates to a common charging apparatus for plug-in charging and non-contact power feeding.

In recent years, a hybrid electric vehicle (HEV) equipped with an electric motor and an internal combustion engine and a HEV equipped with a plug-in charging device have been put into practical use. An electric vehicle (EV) having only an electric motor has also been put into practical use.
Hereinafter, the electric vehicle (EV) including the plug-in HEV is referred to as an electric vehicle (EV).

As charging devices for charging the above-described electric vehicle (EV) in-vehicle battery from a commercial power source, a “plug-in charging device” and a “contactless charging device” are known.
Plug-in charging devices are disclosed in, for example, Patent Documents 1 to 3. Moreover, the non-contact electric power feeding type charging device is disclosed by patent document 4, 5, for example.

JP 2010-239845 A JP 2010-259308 A JP 2011-135663 A JP 2010-226889 A JP 2012-70565 A

Conventionally, only one of the plug-in type charging device and the non-contact power feeding type charging device described above has been used as an in-vehicle charging device. However, it is assumed that only the plug-in type charging device facility or only the non-contact power feeding type charging device facility is provided as the facility on the commercial power supply side for supplying electric power to the electric vehicle (EV).
Therefore, a shared charging device that can charge an electric vehicle from either a plug-in type or a non-contact power supply type has been desired.

FIG. 1 is a basic configuration diagram of such a shared charging apparatus.
In this figure, the distribution board on the commercial power source side includes a charging plug 3a connected to the commercial AC power source 1 via a plug-in charging MC 2a, and a power feeding connected to the commercial AC power source 1 via a non-contact power feeding MC 2b. A coil 3b.
On the other hand, the electric vehicle (EV) includes a charging socket 4a directly connected to the charging plug 3a, a power receiving coil 4b that is contactlessly powered from the power feeding coil 3b, breakers 5a and 5b, a rectifier 6, an AC charger 7a, and a DC charging. Device 7b, breakers 8a and 8b, and in-vehicle battery 9.

However, in the case of the shared charging device shown in FIG. 1, the input / output sides of the plug-in charging lines 4a, 5a, 7a, 8a, 9 and the non-contact charging charging lines 4b, 5b, 6, 7b, 8b, 9 respectively. Since the circuit breakers (breakers 5a, 5b, 8a, 8b) are provided in the circuit board, the circuit breaker operation for starting charging is complicated and there is a risk of erroneous operation.
Moreover, since the two units of the AC charger 7a and the DC charger 7b are provided, there is a problem that the in-vehicle space becomes large.

  The present invention has been developed to solve such problems. That is, an object of the present invention is to provide an in-vehicle device that requires a small number of circuit breakers (breakers), is easy to operate a circuit breaker, has no fear of erroneous operation, and omits an AC charger or a DC charger. It is an object of the present invention to provide a common charging device for plug-in charging and non-contact power feeding that can reduce the space.

According to the present invention, a plug that can be connected to a distribution board having a charging plug for plug-in charging connected to a commercial AC power source and a non-contact power feeding charging coil connected to the commercial AC power source. In-charging and non-contact power supply shared charging device,
A single DC charger that converts a DC current of the first voltage into a charging current for an in-vehicle battery;
A single in-vehicle breaker which is located between the DC charger and the in-vehicle battery and can be cut off between them;
A first plug-in charging unit that is positioned between a charging socket directly connected to the charging plug and the DC charger and converts an alternating current of a second voltage supplied through the charging socket into the direct current. A conversion circuit;
For contactless power feeding, which is located between a power receiving coil that is contactlessly fed from the power feeding coil and the DC charger, and that converts an alternating current of a third voltage supplied via the power receiving coil into the direct current. There is provided a common charging device for plug-in charging and non-contact power feeding, characterized by comprising a second conversion circuit.

According to an embodiment of the present invention, the first conversion circuit includes a first transformer that converts an alternating current of the second voltage into an alternating current of the first voltage, and a direct current of the first voltage that converts the alternating current of the first voltage. A first rectifier for converting to
The second conversion circuit includes a second transformer that converts an alternating current of the third voltage into an alternating current of the first voltage, and a second rectifier that converts the alternating current of the first voltage into a direct current of the first voltage. .

  According to the configuration of the present invention, the DC current of the first voltage (for example, 100 to 400 V) is supplied to the single DC charger by both the first conversion circuit and the second conversion circuit. The DC battery of the first voltage can be converted into the charging current for the in-vehicle battery by one DC charger to charge the in-vehicle battery. Therefore, the required on-vehicle space can be reduced by omitting the AC charger.

Further, since there is only one on-board breaker between the DC charger and the on-board battery, the required number of circuit breakers (vehicle breakers) is small, the circuit breaker operation is simple, and there is no risk of erroneous operation.

It is a basic block diagram of the assumed common charging device. 1 is a basic configuration diagram of a shared charging apparatus according to the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure, and the overlapping description is abbreviate | omitted.

FIG. 2 is a basic configuration diagram of the shared charging apparatus 10 according to the present invention.
In this figure, the distribution board on the commercial power source side includes a charging plug 3a connected to the commercial AC power source 1 via a plug-in charging MC 2a, and a power feeding connected to the commercial AC power source 1 via a non-contact power feeding MC 2b. A coil 3b.

  The commercial AC power source 1 is a power source that supplies electric power necessary for generating electric power to be transmitted to an electric vehicle (EV), for example, a power source that supplies three-phase AC power having a voltage of 200 [V]. is there. The commercial AC power source 1 is not limited to a three-phase AC power source, and may be a power source that supplies single-phase AC power.

  The common charging device 10 for plug-in charging and non-contact power supply according to the present invention includes a charging plug 3a for plug-in charging connected to a commercial AC power source 1 and a non-contact power charging for charging connected to the commercial AC power source 1. It is configured to be connectable to a distribution board having a power feeding coil 3b.

  In this figure, the shared charging apparatus 10 of the present invention includes a single DC charger 12, a single in-vehicle breaker 13, a first conversion circuit 14, and a second conversion circuit 16.

  The single DC charger 12 converts the DC current of the first voltage V1 into a charging current for the in-vehicle battery 9. The first voltage V1 is preferably 100 to 400V, for example.

  The single vehicle-mounted breaker 13 is a circuit breaker that is located between the DC charger 12 and the vehicle-mounted battery 9 and that can be cut off. This circuit breaker may be an electromagnetic type that can be operated manually or remotely.

  The first conversion circuit 14 is for plug-in charging, is located between the charging socket 4a directly connected to the charging plug 3a and the DC charger 12, and is supplied with the second voltage V2 supplied via the charging socket 4a. Is converted into a direct current of the first voltage V1. The second voltage V2 is, for example, 100 to 400V.

  The second conversion circuit 16 is for non-contact power supply, is located between the power receiving coil 4b and the DC charger 12 that are contactlessly powered from the power supply coil 3b, and is supplied via the power receiving coil 4b. The alternating current of the voltage V3 is converted into the direct current of the first voltage V1. The third voltage V3 is, for example, 100 to 400V.

In FIG. 2, the first conversion circuit 14 includes a first transformer 15a that converts an alternating current of the second voltage V2 into an alternating current of the first voltage V1, and a direct current of the first voltage V1 that converts the alternating current of the first voltage V1. And a first rectifier 15b for converting into the first rectifier 15b.
The second conversion circuit 16 converts the alternating current of the third voltage V3 into an alternating current of the first voltage V1, and converts the alternating current of the first voltage V1 into a direct current of the first voltage V1. Second rectifier 17b.

  The first rectifier 15b and the second rectifier 17b are circuits that rectify an alternating current supplied from the commercial alternating-current power supply 1 and convert it into a direct current, and are realized by, for example, a rectifier circuit (bridge rectifier circuit).

  The power supply coil 3b and the power reception coil 4b are arranged in a state where they are close to each other, thereby forming an electromagnetic coupling circuit. This electromagnetic coupling circuit means a circuit in which the feeding coil 3b and the receiving coil 4b are electromagnetically coupled and non-contact feeding is performed from the feeding coil 3b to the receiving coil 4b. Either a circuit that performs power supply or a circuit that performs power feeding by an “electromagnetic resonance method” may be used.

When non-contact power feeding is performed from the feeding coil 3b to the receiving coil 4b by the “electromagnetic resonance method”, the AC current of the third voltage V3 is higher than the frequency (50 Hz or 60 Hz) of the commercial AC power source 1 (for example, 100 kHz or more, Preferably less than 1 MHz).
In this case, it is preferable to provide the frequency conversion circuit FC between the non-contact power supply MC2b and the power supply coil 3b in FIG.
Such a frequency conversion circuit FC can be constituted by, for example, a rectifier circuit and an inverse conversion circuit (inverter) that converts a direct current from the rectifier circuit into an alternating current.

  Hereinafter, the operation of the shared charging apparatus 10 of the present invention will be described.

(When only the plug-in charger equipment is provided on the commercial power supply side)
The commercial power supply side charging plug 3a is directly connected to the EV side charging socket 4a in a state where the commercial power supply side plug-in charging MC 2a and the non-contact power supply MC 2b are cut off and the EV side in-vehicle breaker 13 is also cut off.
Next, plug-in charging is started by connecting the MC 2a for plug-in charging and the in-vehicle breaker 13.

  In this plug-in charging, the first conversion circuit 14 converts the AC current of the second voltage V2 supplied via the charging socket 4a into the DC current of the first voltage V1, and the single DC charger 12 The DC current of the first voltage V1 is converted into a charging current for the in-vehicle battery 9, and the in-vehicle battery 9 is charged via the in-vehicle breaker 13.

(When only non-contact power supply equipment is provided on the commercial power supply side)
With the plug-in charging MC 2a and the non-contact power supply MC 2b on the commercial power source side cut off and the in-vehicle breaker 13 on the EV side also cut off, the power receiving coil 4b on the EV side is contacted with the power receiving coil 4b on the commercial power source side. Position it where possible.
Next, the non-contact power supply is started by connecting the non-contact power supply MC2b and the in-vehicle breaker 13.

  In this non-contact power feeding, the second conversion circuit 16 converts the alternating current of the third voltage V3 supplied through the power receiving coil 4b into the direct current of the first voltage V1, and the single DC charger 12 The DC current of the first voltage V1 is converted into a charging current for the in-vehicle battery 9, and the in-vehicle battery 9 is charged via the in-vehicle breaker 13.

  As described above, according to the configuration of the present invention, both the first conversion circuit 14 and the second conversion circuit 16 have a single DC charger with a single DC current of the first voltage V1 (for example, 100 to 400V). 12, the single DC charger 12 can convert the DC current of the first voltage V <b> 1 into the charging current for the in-vehicle battery 9 to charge the in-vehicle battery 9. Therefore, the required on-vehicle space can be reduced by omitting the AC charger.

  Further, since only one in-vehicle breaker 13 is provided between the DC charger 12 and the in-vehicle battery 9, the required number of circuit breakers (in-vehicle breaker 13) is small, the circuit breaker operation is simple, and there is a risk of erroneous operation. There is no.

  In addition, according to the embodiment of the present invention, the first converter circuit 14 includes the first transformer 15a and the second converter circuit 16 includes the second transformer 17a, so that either plug-in charging or non-contact power feeding is used. The other can be insulated with a transformer (15a or 17a).

  In addition, this invention is not limited to embodiment mentioned above, is shown by description of a claim, and also includes all the changes within the meaning and range equivalent to description of a claim.

1 Commercial AC power supply,
2a MC for plug-in charging, 2b Non-contact power supply MC,
3a charging plug, 3b feeding coil,
4a charging socket, 4b receiving coil,
5a, 5b breaker, 6 rectifier,
7a AC charger, 7b DC charger,
8a, 8b breaker, 9 vehicle battery,
10 common charger, 12 DC charger,
13 on-board circuit breaker, 14 first conversion circuit,
15a first transformer, 15b first rectifier,
16 second conversion circuit,
17a Second transformer, 17b Second rectifier

Claims (2)

Plug-in charging and non-contact power supply connectable to a distribution board having a charging plug for plug-in charging connected to a commercial AC power source and a non-contact power charging power supply coil connected to the commercial AC power source A shared charging device,
A single DC charger that converts a DC current of the first voltage into a charging current for an in-vehicle battery;
A single in-vehicle breaker which is located between the DC charger and the in-vehicle battery and can be cut off between them;
A first plug-in charging unit that is positioned between a charging socket directly connected to the charging plug and the DC charger and converts an alternating current of a second voltage supplied through the charging socket into the direct current. A conversion circuit;
For contactless power feeding, which is located between a power receiving coil that is contactlessly fed from the power feeding coil and the DC charger, and that converts an alternating current of a third voltage supplied via the power receiving coil into the direct current. A common charging device for plug-in charging and non-contact power feeding, comprising a second conversion circuit. The first conversion circuit includes a first transformer that converts an alternating current of the second voltage into an alternating current of the first voltage, and a first rectifier that converts the alternating current of the first voltage into a direct current of the first voltage. And
The second conversion circuit includes a second transformer that converts an alternating current of the third voltage into an alternating current of the first voltage, and a second rectifier that converts the alternating current of the first voltage into a direct current of the first voltage. The common charging device for plug-in charging and non-contact power feeding according to claim 1.

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