FR2882864A1 - Electrical circuit for supplying electricity to e.g. pulser motor, has battery coupled to voltage generator connected to pulser motor coupled to control panel so that motor is supplied and its triggering, driving or stopping are controlled - Google Patents

Abstract

The circuit (10) has a voltage generator (30) connected to a battery (40). The battery and the generator are connected to functional equipments such as a positive temperature coefficient resistor (80) and a pulser motor (100), via a branch circuit (50) which connects a control panel (70). The motor is connected to the panel, so that the motor is supplied and its triggering, driving at various speeds, or stopping are controlled. An independent claim is also included for a method for the delivery of electric current to functional equipments.

Description

ELECTRIC CIRCUIT PROVIDED WITH A SECONDARY GENERATOR

  VOLTAGE FOR THE PROVISION OF ELECTRICITY IN A COCKPIT

OF MOTOR VEHICLE

  The invention relates to an electrical circuit provided with a secondary voltage generator for the supply of electricity in a passenger compartment of a motor vehicle, in particular for a preheating member, and a method using in particular said circuit.

  It is particularly unpleasant to enter a motor vehicle that has been immobilized in a cold place, including a garage, because the interior of said vehicle has a low indoor temperature. Once the engine of the motor vehicle is started, sometimes it takes several minutes, or even ten minutes in the most extreme cases, to warm the cabin properly and uniformly. During this period, the driver and passengers must therefore withstand a low temperature and ventilation at this temperature.

  Moreover, the start of the ventilation alone, before starting the motor vehicle or shortly after its start, is generally to be avoided because it would send fresh air from either the cabin or the car. outside. However, this air would not have had time to warm up properly thanks to the engine and the usual heating system, and the opposite effect to that desired may be obtained.

  Thus, whether the vehicle is in a cold garage or during the first minutes after starting, the cabin remains at a relatively low temperature that can be particularly inconvenient for its occupants.

  A known solution for not having to undergo this cold is to connect the sector a small electric heater, for example a bathroom radiator, and place it in the passenger compartment when the motor vehicle is stopped. However, this system is awkward, not suitable for this type of use, and can be dangerous if it is misplaced or misdirected, and hot air expelled is not uniformly distributed in the passenger compartment. Moreover, a radiator of this type, adapted to a vehicle voltage and connected to the vehicle battery, may discharge the battery very quickly and deteriorate for an unsatisfactory effect.

  Thus, it is particularly difficult in current vehicles to quickly warm the interior of a cold car.

  Another problem arises concerning the more global use of functional equipment of a passenger compartment of a motor vehicle when said vehicle is immobilized with the engine stopped, whether in a garage or near a dwelling. Indeed, a significant risk of discharging the battery exists when using such functional equipment, such as a CD / DVD player or a satellite guidance system, or the organs of a heater, ventilation and / or air conditioning. The risk concerns the starting of the motor vehicle because this phase requires a significant electrical power to be provided in a short time by the battery. If too many uses of the battery are made to supply functional elements when the motor vehicle is immobilized with the engine stopped, said battery may discharge quickly and wear prematurely, too much discharge.

  Some recent cars are equipped with a momentary engine stop system when the vehicle is immobilized in the traffic, also called stop and start system. With this system, the charge of the battery coupled to an alternator-starter, must be perfectly known, controlled, and maximum when starting or restarting the vehicle. The disadvantages mentioned above therefore increase in intensity in this type of vehicle, because the battery is then used more frequently than in vehicles that are not equipped with this intermittent shutdown system of the engine.

  Finally, with regard to the batteries of the hybrid type vehicles with electric and thermal engines, or vehicles with a combustion engine, there is no means of controlling the charge of the vehicle battery when the latter is in parking mode. The problems mentioned above arise therefore especially as in these particular vehicles, the battery provides a large part of the energy required. A high risk of rapid and unexpected discharge of the battery is expected if the use of it is not monitored.

  An object of the present invention is therefore to provide a means for very quickly, and reliably, a source of electric current in a stationary vehicle, in particular for preheating the passenger compartment at a standstill, and for any application consuming electrical energy.

  More specifically, the invention relates to an electrical circuit for the supply of electricity in a passenger compartment of a motor vehicle, comprising at least one battery delivering an electric current, and at least one functional equipment of the passenger compartment of the vehicle electrically connected to said battery for being supplied with current, said circuit further comprising a secondary voltage generator connected directly to the mains and supplying an electrical current to the functional equipment for supplying it and / or to said battery for recharging it.

  According to preferred embodiments of the present invention: - the secondary generator is interposed between the sector, delivering a current under a voltage of about 230 volts, the battery and / or said functional equipment to deliver to the one as to the another electric current at a voltage of between about 12 and 16 volts; - The secondary generator is electrically connected to the battery using power cables, and the battery and the secondary generator are electrically connected to each functional equipment via a bypass secondary circuit; the functional equipment is chosen from: a positive temperature coefficient resistor, a blower motor propelling warm and / or cold air, audio / video equipment, an electric or hybrid compressor, and a combination of minus two of these functional equipments; a switch electrically connected to the secondary generator is provided in the bypass secondary circuit for controlling the supply of the resistor; - A blower motor is electrically connected to the secondary bypass circuit to cooperate with the preheating resistance of the passenger compartment of the vehicle, when it stops; a switch is connected between the battery and the secondary bypass circuit, for supplying the functional equipment with electrical power from either the battery or the secondary generator; the circuit also comprises a probe for monitoring the state of charge / discharge of the battery, said probe being interposed between the secondary generator and said battery; and - the circuit further comprises a control panel for controlling the operation of the circuit and in particular the charging of the battery by the secondary generator or the discharge of said battery when it supplies a functional electrical power equipment.

  The present invention also relates to a method for delivering electrical power to at least one functional equipment of a vehicle cabin, in particular using an electric circuit as described above, consisting of electrically connecting a secondary generator of voltage connected to the mains to a battery in order to recharge it and / or on the functional equipment to supply it with electricity.

  Advantageously, the sector supplies power at a voltage of about 230 volts directly to the generator and said generator supplies electrical power at a voltage between about 12 and 16 volts to the equipment and / or the battery.

  Preferably, an operation for controlling and adapting the charge of the battery by the generator, or an operation of discharging said battery when it delivers current to the functional equipment, is carried out by an interposed control probe. between the battery and the secondary generator.

  Other characteristics, details and advantages of the invention will emerge on reading the detailed description which follows, with reference to exemplary embodiments illustrated by the appended drawings which represent respectively: FIG. 1, a schematic view of a first embodiment of an electric circuit according to the present invention, - Figure 2 is a schematic view of an electric circuit according to a second embodiment of the present invention, Figure 3, a schematic view of a electrical circuit according to a third embodiment of the present invention, and - Figure 4, a schematic view of an electrical circuit according to a fourth embodiment of the present invention.

  Figures 1 to 4 show, in a simplified manner, an electrical circuit 10 for supplying electrical power to functional equipment of a motor vehicle, in particular functional equipment equipping the passenger compartment of said vehicle. Different applications are described below for different types of functional equipment that can be used, particularly when the vehicle is stationary.

  In FIG. 1, the electrical circuit 10 comprises a voltage source 20 of sector type substantially equal to 230 Volts, delivering a continuous electric current. This voltage source 20 may for example be a normal electrical outlet, either a garage in which the motor vehicle is parked, or a housing part near which the vehicle is.

  A secondary voltage generator 30 is electrically connected to the voltage source 20 to be supplied directly with mains voltage. This secondary generator 30 delivers an electric current at a voltage of between about 12 and 16 volts for a power of about 2 kilowatts or more, said voltage being variable at the output of the generator or can be modulated by the user. At the output, the secondary generator 30 is connected, using power cables 35, to a battery 40 of ordinary type mounted in the vehicle, and to a branch secondary circuit 50 supplying at least one functional equipment. An extension, illustrated by the cable 25, allows the secondary generator 30 to be placed in various places around or in the motor vehicle, preferably close to the battery 40, for example on the engine bonnet of the vehicle.

  A control probe 60 measuring the current 'beats' and the voltage Vbat passing through the battery 40 is electrically connected to the secondary generator 30 via supply cables 65. This control probe 60 is provided on one of the power cables. 35 to control the state of charge / discharge of the battery 40. A control panel 70, for example a heater, ventilation and / or air conditioning, is also electrically connected to the secondary circuit 50, with the aid of power cables 75.

  With the control probe 60, the secondary generator regulates the operation of the electric circuit 10 so that the battery 40 delivers no current to the functional equipment to be powered, to prevent it from being discharged. The secondary generator 30 takes over to provide the functional equipment with the current just needed. In practice, the secondary generator 30 provides a voltage slightly greater than the voltage of the battery 40 so as not to discharge it.

  In the configuration where the charge of the battery 40 is sought, the secondary generator 30 is controlled according to the measurements of the control probe 60 to provide the necessary current to recharge the battery 40 under the best conditions.

  In the embodiment illustrated in FIG. 1, a first functional equipment is in the form of a resistor 80, for example a positive temperature coefficient (PTC). This resistor 80 is electrically connected to the secondary circuit 50 by means of power cables 85, one of which is provided with a control switch 90 supplied directly by the secondary generator 30 by means of a cable 95, especially for unregulated equipment. A second functional equipment, consisting of a blower motor 100, is connected to the control panel 70 by cables 105 in order to be powered and thus be controlled tripping, drive at different speeds, or stopped. This blower motor 100 can thus cooperate with the resistor 80 with a positive temperature coefficient in order to propel heated air through said resistor 80 into the passenger compartment of the vehicle. The switch 90 can be manually switched to the closed position when it is desirable to electrically power the resistor 80 to heat. When the blower motor 100 does not rotate, the resistor 80 is not powered to prevent overheating in the heater, ventilation and / or air conditioning and consume unnecessarily energy.

  This possibility of starting up a preheating of the passenger compartment is particularly useful and appreciable in case of storing the vehicle in a very cold garage, or simply to quickly warm a vehicle interior that the driver or a passenger would find too cool and therefore uncomfortable. This preheating can especially be performed before starting the vehicle, and without having to use the battery 40 or using only a small portion of its energy, the main energy being supplied by the secondary generator 30 connected to the sector 20.

  For this, a simple check of the state of charge / discharge of the battery 40 can be performed quickly using the control panel 70 and the control probe 60.

  Figure 2 schematically shows a second embodiment of the present invention. In this mode, the electrical circuit 10 comprises the voltage source 20 substantially equal to 230 Volts, the secondary voltage generator 30, the battery 40, the bypass secondary circuit 50, the control probe 60, the control panel 70, the blower motor 100 and a switch 190 for supplying said motor 100 either by the secondary generator 30 or by the battery 40, via the branch circuit 50.

  In this embodiment, said pre-ventilation, the blower motor 100 is also electrically connected to the end of the secondary circuit 50. In this arrangement, the operation of the blower motor 100 is controlled by an electronic module (not shown ) This is mainly to supply the motor 100 of the blower to perform ventilation of the passenger compartment with air from outside or recycled, without heating.

  The control modes of the blower motor 100 presented according to the arrangements of FIGS. 1 and 2, either via the control panel 70 or by connection to the secondary circuit 50 via a power module, can be combined and be substituted for one to each other in the various embodiments described.

  Figure 3 schematically shows a third embodiment of the present invention. In this mode, the electrical circuit 10 comprises the voltage source 20 substantially equal to 230 Volts, the secondary voltage generator 30, the battery 40, the bypass secondary circuit 50, the control probe 60, the control panel 70, an audio / video equipment 110 and the switch 190 for supplying said audio / video equipment 110 either by the secondary generator 30 or by the battery 40, via the secondary circuit 50.

  In this embodiment, it is mainly to supply the audio / video equipment 110 so that it diffuses in the cabin of the vehicle music coming from a car radio or a CD player, a film from a DVD player, traffic information, position or real-time guidance information if it is a satellite positioning system.

  Figure 4 schematically shows a fourth embodiment of the present invention. In this mode, the electrical circuit 10 comprises the voltage source 20 substantially equal to 230 Volts, the secondary voltage generator 30, the battery 40, the bypass secondary circuit 50, the control probe 60, the control panel 70, an electric or hybrid compressor 120 of an air conditioning circuit (not shown) and the switch 190 for supplying said compressor 120 either by the secondary generator 30, or by the battery 40, via the secondary circuit 50.

  In this embodiment, it is mainly to supply the electric compressor 120 so that it performs a pre-cooling of the passenger compartment of the vehicle.

  In all the embodiments presented above and illustrated in FIGS. 1 to 4, the electrical power supply of each functional equipment can be realized when the vehicle is stopped, by drawing the electrical energy either from the battery 40, according to its state. charge, or preferably in the secondary generator 30.

  Thus, no functional equipment of the cabin, such as the resistor 80, the motor 100 of the blower, the audio / video equipment 110 or the electric or hybrid compressor 120, completely discharges the battery 40 when the electric generator 30 provides substantially all the current needed for their operation.

  This solution also makes it possible to have no electrical cable under a voltage of 230 Volts in the cabin. It is therefore not necessary to take into account the restrictive standards relating to the use of a mains voltage in a passenger compartment of a motor vehicle. A simple protection against short circuits is therefore sufficient for the cables 25 and 35.

  Furthermore, the architecture of the electrical circuit 10 thus designed according to the present invention is very simple, with little modification or adaptation of a known type of circuit. This architecture also makes it possible to perform a more appropriate management of the charge of the battery 40.

  For example, during a preheating phase of the passenger compartment of the vehicle using the resistor 80 and the blower, the state of charge of the battery 40 is controlled by the probe 60 in order not to decrease the reliability of the vehicle. The purpose is to ensure that the current required during this preheating phase is as much as possible from the secondary generator 30. The control probe 60 makes it possible to better manage the state of charge of the battery 40. measuring the voltage Vbat and the current 'bat which cross it. This management consists in reconciling the supply of current with the functional equipment and the minimal use of the battery 40. Indeed, once the secondary generator 30 removed, for example when the vehicle rolls, the battery 40 can recharge only when the engine rotates, preferably at a high speed.

  The secondary generator 30 operates in two complementary ways. Either it delivers electrical power to functional equipment requiring it, in which case the voltage delivered must be substantially equal to the voltage that would deliver the battery 40, that is to say substantially 12 to 16 volts, or it delivers a little more than current in order to also recharge the battery 40. In this second case, the control probe 60 makes it possible to check the charge delivered to the battery 40 by the secondary generator 30 to avoid damage by overcharging and consequently a decrease in reliability of the battery 40 A switch (not shown) accessible by the user can be used to switch from one mode to another when the charge of the battery 40 is too low to limit its premature aging and its prolonged or too repetitive discharge. The secondary generator 30 is therefore adapted to provide the current required by the functional equipment, thanks in particular to the control probe 60.

  Thus, the circuit of the present invention is particularly suitable for vehicles having functional equipment consuming a large amount of electric current from the main battery, for example in cold countries, to vehicles equipped with the stop type engine stop system. and start and to hybrid vehicles with thermal and electric engines, or even entirely electric.

  It should be understood, however, that the detailed description, given solely by way of illustration of the subject of the invention, in no way constitutes a limitation, the technical equivalents also being included in the scope of the present invention.

  Thus, other equipment can be powered by the circuit of the present invention, in particular via the cigarette lighter socket, such as a portable refrigerator, a portable DVD player or a game console.

  It is also possible to combine at least two of the aforementioned equipment, for example the blower motor, the resistor and the audio / video equipment, or all together.

Claims (12)

  An electric circuit (10) for supplying electricity to a passenger compartment of a motor vehicle, comprising at least one battery (40) delivering an electric current, and at least one functional equipment (80; 100; 110; 120) of the vehicle interior connected electrically to said battery (40) to be supplied with current, characterized in that it further comprises a secondary voltage generator (30) connected directly to the sector (20) and supplying an electric current to the functional equipment (80; 100; 110; 120) for powering it and / or said battery (40) for recharging it.   2. Circuit according to claim 1, wherein the secondary generator (30) is interposed between the sector (20), delivering a current under a voltage of about 230 volts, the battery (40) and / or said functional equipment (80; 100 110; 120) for supplying an electric current to each other at a voltage of between about 12 and 16 volts.   The circuit of claim 2, wherein the secondary generator (30) is electrically connected to the battery (40) with power cables (35), and the battery (40) and the secondary generator (30). ) are electrically connected to each functional equipment (80; 100; 110; 120) via a secondary branch circuit (50).   The circuit of claim 3, wherein the functional equipment (80; 100; 110; 120) is selected from: a positive temperature coefficient resistor (80), a blower motor (100) propelling air hot and / or cold, audio / video equipment (110) and an electric or hybrid compressor (120), and a combination of at least two so-called functional equipment.   The circuit of claim 4, wherein a switch (90) electrically connected to the secondary generator (30) is provided in the bypass secondary circuit (50) for controlling the supply of the resistor (80).   6. Circuit according to claim 4 or 5, wherein a motor (100) of blower is electrically connected to the bypass secondary circuit (50) to cooperate with the resistor (80) to the preheating of the passenger compartment of the vehicle, to the stop it.   The circuit of any one of claims 4 to 6, wherein a switch (190) is connected between the battery (40) and the bypass secondary circuit (50) to power said functional equipment (100; 110; 120) from either the battery (40) or the secondary generator (30).   8. Circuit according to any one of the preceding claims, characterized in that it also comprises a probe (60) for monitoring the state of charge / discharge of the battery (40), said probe being interposed between the secondary generator. (30) and said battery (40).   9. Circuit according to any one of the preceding claims, characterized in that it further comprises a control panel (70) for controlling the operation of the circuit (10) and in particular the charging of the battery (40) by the generator secondary (30) or discharge of said battery (40) when it supplies a functional equipment (80; 100; 110; 120) with electrical current.   A method for supplying electrical power to at least one functional equipment (80; 100; 110; 120) of a vehicle passenger compartment, in particular by means of an electrical circuit (10) according to any of the claims. characterized in that it consists in electrically connecting a secondary voltage generator (30) connected to the sector (20) to a battery (40) in order to recharge it, and / or on the functional equipment (80; 110; 120) for supplying electric current.   The method of claim 10, wherein the sector (20) supplies current at a voltage of about 230 volts directly to the generator (30) and said generator (30) provides electrical power at a voltage of between about 12 and 16 Volts to the equipment (80; 100; 110; 120) and / or the battery (40).   The method of claim 10 or 11, wherein an operation of controlling and matching the charge of the battery (40) by the generator (30), or an operation of discharging said battery (40) when it delivers current to the functional equipment (80; 100; 110; 120) is effected by a control probe (60) interposed between the battery (40) and the secondary generator (30).