FR2767095A1 - ELECTRIC VEHICLE WITH ADDITIONAL AC POWER NETWORK - Google Patents

Abstract

The present invention relates to an electric vehicle of the type using a high energy accumulator (2) supplying an electric motor. The invention is characterized in that it comprises at least one socket (10) for the connection of alternating current electrical consumers, said socket (10) being connected to a current reversing means (4 ) to supply alternating current to a home network voltage. Application to electric vehicles.

Description

Electric vehicle with additional AC network The invention

  relates to an electric vehicle of the type using a high energy accumulator powering a motorization

) electric.

  An electric vehicle of this type is known for example from

DE-A-4.107.391.

  Electric vehicles generally have two independent current networks. A first current network is used to supply the power line, namely the electric motor. The second current network is used to supply the signaling and

  security, for example lamps and displays.

  It is also known to use the female lighter socket.

  cigar of a motor vehicle or respectively its starter battery to power devices which are not permanently attached to the vehicle, such as for example a telephone, a cooling box, an electric torch, a vacuum cleaner, etc. Higher energy consumption is however limited by the low capacity of the starter battery and can only be used with devices with low power requirements or for a short time. This is particularly true when the accumulator is not z constantly recharged, for example by the dynamo or the alternator of a motor vehicle. The known low voltages of the starter accumulator (6, 12 or 24 volts) as well as the cost of an inverter necessary for the operation of AC devices lead to the predominant fact that only devices with direct current,

  working with the starter battery, are used.

  When, in exceptional cases, there is however a need for alternating current at the mains voltage (220 l5 volts) from the starter accumulator or from a separate auxiliary accumulator for the operation of special devices, this requires an inverter (or chopper) and a transformer for transforming the DC voltage of the accumulator into AC voltage

) from the network.

  Such limitations regarding power or duration of use also exist for devices supplied with alternating current by accumulators of the so-called SLI type.

  (starting, lighting and ignition).

  The use of electric vehicles with high energy accumulators, which have a high energy content and

  high power in kilowatts for high voltage

  above the mains voltage, in principle allows the connection of high voltage external electrical devices which must be supplied with alternating current at the

home network voltage.

  An object of the present invention is to provide an electric vehicle of the type mentioned in the introduction which has an additional alternating current network which is suitable for supplying external electrical devices or devices with alternating current at the voltage of the household network. î For this purpose, the electric vehicle according to the invention is characterized in that it comprises at least one socket for the connection of electrical consumers with alternating current, said socket being connected to a reversing means of current to supply current

  alternative to a home network voltage.

  This makes available to the vehicle user an additional current network to the voltage of the home network. According to a first embodiment of the invention, said reversing means consists of an inverter

  power supply to the vehicle's electric motor.

  ) According to a second embodiment, said reversing means consists of an electrical supply line, which can be connected to an external supply network, of a battery charger operating in bidirectional current conduction and connected to said accumulator at high

energy.

  In the case of a battery charger, it is necessary that it is bidirectional, that is to say that it can work with an electric current in both directions. Arrangements for battery chargers working bidirectionally are also known, for example, by non-current power supplies

  interruptible in current, say UPS, or also by DE-A-

  4.107.391, the traction inverter working in bidirectional mode, as a direct current supplier

in charge mode.

  For safety reasons, in this case, the external contacts for the two current directions (power line and power outlet line) must be separated from each other. For the current supply of the battery charger, a supply line is preferably used with a protected socket. For the supply of current by the battery charger also working in reverse direction, a socket outlet mounted in

  parallel to the power line and connected to it.

  I () Protected sockets or connectors for electric vehicles are, according to standards VDE 0623, part 5 and DIN IEC 23H / 73,

  connected to the vehicle via flexible lines.

  The security requirements are described in these standards.

  According to one embodiment of the invention, the taking of

  current is mounted on an exterior wall of the vehicle.

  Alternatively, the power outlet is mounted inside the vehicle, preferably behind the tailgate or

the trunk door.

  In both cases, easy and comfortable access is ensured

for the user.

  Preferably, the vehicle comprises a locking device prohibiting consumption of current on the socket under unacceptable operating conditions, for example in the event of insufficient charge or of inadmissible temperature of the accumulator or during

vehicle operation.

  One can provide for this purpose a display and / or a counting of the quantity of energy extracted from the network of additional alternating current, or a display of the state of

accumulator charge.

  The invention will be clearly understood on reading the description

  following of two exemplary embodiments, with reference to the appended drawing in which: FIG. 1 represents a diagram of connections of an electric vehicle according to a first embodiment of the invention, and FIG. 2 represents a diagram of connections of a vehicle

  1) according to a second embodiment of the invention.

  In the example of FIG. 1, the vehicle comprises a high energy accumulator 2 connected to an inverter 4 which causes the direct current delivered by the high energy accumulator to undulate. The inverter 4 is connected on the one hand to an electric motorization 6, for example an electric motor, and on the other hand to an electrical outlet 10 for the taking of alternating current at a domestic grid voltage for an external electric consumer . A battery charger 8, connected to the high energy accumulator 2, is connected to a supply line 12 to recharge the high energy accumulator 2. The supply line 12 is equipped for

  a connection to an external network.

  In the variant shown in Figure 2, the vehicle has a high energy accumulator 2 'connected to an inverter 4' which is electrically coupled to the electric motor 6 'of the vehicle. An 8 'battery charger, connected to the 2' accumulator for recharging, has a 12 'supply line and is arranged for a bidirectional energy flow. A 10 'outlet, with corresponding connection lines, is connected to the line

  power supply 12 'or respectively connected in parallel.

  The socket 10 'is used to connect an additional AC consumer to the voltage of the home network. When the battery charger 8 'is not used to charge the accumulator 2', it can be operated in the direction opposite to the charging mode and, in this case, supplies the

10 'power outlet.

Claims (7)

  1. Electric vehicle of the type using a high energy accumulator (2, 2 ') supplying an electric motor, characterized in that it comprises at least one socket (10, 10') for the connection of electrical consumers to alternating current, said socket (10) being connected to a current reversing means (4, 8 ') for supplying alternating current to a voltage of the 1) home network.   2. Electric vehicle according to claim 1, characterized in that said reversing means consists of an inverter (4) supplying the motorization electric (6) of the vehicle.   3. Electric vehicle according to claim 1, characterized in that said reversing means consists of an electric supply line (12 ′), which can be 2 () connected to an external supply network, of a charger batteries (8 ') operating in bidirectional current conduction and connected to said high energy accumulator (2').   4. Electric vehicle according to one of claims 1 to 3,   characterized in that the socket (10, 10 ') is   mounted on an exterior wall of the vehicle.   5. Electric vehicle according to one of claims 1 to 3,   3 (0 characterized in that the socket outlet (10, 10 ') is mounted inside the vehicle, preferably behind the tailgate or boot lid.   6. Electric vehicle according to one of claims 1 to 5,   characterized in that it comprises a locking device preventing current consumption on the socket (10, 10 ') under unacceptable operating conditions, for example in the event of insufficient charge or of inadmissible temperature of the accumulator   (2, 2 ') or during vehicle operation.   7. Electric vehicle according to one of claims 1 to 6,   characterized in that it comprises a display and / or a counting of the quantity of energy extracted from the additional alternating current network, or else a display of   the state of charge of the accumulator. I (