CH717116A2 - Device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator with an HVAC system. - Google Patents

Abstract

The invention relates to a device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator in which a fluid circulates, said air conditioning circuit comprising at least one external condenser / evaporator (2), a compressor ( 4), an internal condenser (6) intended to heat the passenger compartment, a first expansion orifice (8) provided downstream of the internal condenser (6), an internal evaporator (14) intended to cool the passenger compartment, a second orifice expansion valve (12) provided upstream of the internal evaporator (14). Said regulating device further comprises a first circuit for heating or recovering thermal energy for heating the electrochemical generator, the electric motor (5), the electronic circuit (7) and optionally the braking circuit (9), and a second cooling circuit or recovery of thermal energy for cooling the electrochemical generator, the electric motor, the electronic circuit and optionally the braking circuit. Several valves (24, 28, 32, 20) are arranged to be able to put the air conditioning circuit in communication with one or the other of the first heating circuit and second cooling circuit, and control means for said valves (24 , 28, 32, 20) arranged to allow, as a function of the temperature of the electrochemical generator (1), of the electric motor, of the electronic circuit and of the braking circuit, the circulation of the fluid of the air conditioning circuit in the first heating circuit for a heating operation as well as the circulation of the fluid from the air conditioning circuit in the second cooling circuit for a cooling operation.

Description

Field of the invention

The invention relates to a device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator, such as a battery, fuel cell or hybrid, with an HVAC system. The device for recovering and regulating thermal energy comprises an air conditioning circuit for an HVAC system in the passenger compartment of the vehicle (heating-ventilation-airconditioning-cooling or heating, ventilation and air conditioning), in which a fluid circulates, said air conditioning circuit comprising at least one external condenser / evaporator, a compressor, an internal condenser intended to heat the passenger compartment, a first expansion orifice provided downstream of the internal condenser, between the internal condenser and the external condenser / evaporator, an evaporator internal intended to cool the passenger compartment, a second expansion orifice provided upstream of the internal evaporator, between the external condenser / evaporator and the internal evaporator.

Background of the invention

[0002] Such devices are known to those skilled in the art, and are used in particular in electric or hybrid vehicles to replace resistance electric heating systems which consume a lot of electricity. HVAC systems also have the advantage of being transformed into air conditioning in the summer. HVAC systems are the most efficient at regulating the temperature of the vehicle interior by optimizing the vehicle's electrical energy consumption. They thus make it possible to increase its autonomy.

Still with a view to increasing the autonomy of an electric or hybrid vehicle, attempts are also made to optimize the energy efficiency of the electrochemical generator by regulating its temperature. Indeed, the temperature has a strong influence on the operation of the electrochemical generator: the electrochemical generator must be cooled when its temperature is too high, or reheated when its temperature is too low. In particular, in winter, an excessively low temperature of the electrochemical generator causes a very significant drop in efficiency so that the range of the vehicle can be halved. In addition, when the electrochemical generator is a battery, the curves of the state of charge as a function of the charging time of the battery indicate that the charging time increases with temperature. In addition, due to the temperature rise during charging, the charging time is relatively quick to reach 80% of the charge but is then very long to reach 100% of the charge.

As such, patent CH 711726B1 describes a device for regulating the temperature of an electrochemical generator, such as a battery or fuel cell or hybrid, of an electric vehicle as shown in Figures 1 to 5, and as explained in detail below as prior art.

[0005] With reference for example to FIG. 1, the device for regulating the temperature of an electrochemical generator of an electric or hybrid vehicle, comprises an air conditioning circuit for an HVAC system of the vehicle interior. This FIG. 1 represents a heating method for example of the battery on charge with the vehicle stationary.

[0006] More particularly, the air conditioning circuit comprises, in a first loop, in the direction of circulation of a fluid, an external condenser / evaporator 2, generally located at the front of the vehicle, an accumulator 3, a compressor 4 , preferably at high speed, an internal condenser 6 intended to heat the passenger compartment, a first expansion port 8 provided downstream of the internal condenser, between the internal condenser 6 and the external condenser / evaporator 2. A bypass 10 is provided between the internal condenser 6 and the external condenser / evaporator 2, at the level of the first expansion orifice 8. A second loop comprises a second expansion orifice 12 provided upstream of an internal evaporator 14, between the external condenser / evaporator 2 and the internal evaporator 14, and which is intended to cool the passenger compartment. At the level of the internal evaporator 14 is provided a fan 16 of the air conditioning unit. The various elements are interconnected by pipes in which a refrigerant fluid, such as a refrigerant gas, circulates. The circulation in the first loop or in the second loop and the bypass is managed by means of a set of valves 18, 20, 21, 28, 32, 36, 38. The valves 18 and 20 are provided at the intersection of the first loop and the second loop, and the valve 21 is provided at the intersection of the first loop and the bypass 10, upstream of the first expansion orifice 8. These valves are for example at least 3-way solenoid valves except for example for the valve 20 has at least 4 ways.

It should be noted that the circulation of the gaseous fluid in the pipes in this embodiment is represented in FIG. 1 by darker lines for this heating mode of the battery when charging with the vehicle stationary. It is the same for the following Figures 2 to 5.

[0008] The regulating device further comprises a first heating circuit of the electrochemical generator 1 in which the same fluid as in the air conditioning circuit is capable of circulating. The first heating circuit of the electrochemical generator comprises, in the direction of circulation of the fluid, a first conduit for supplying the fluid 22 to a heat transfer element associated with the electrochemical generator 1. The first supply pipe 22 is connected to a first outlet provided between the compressor 4 and the internal condenser 6 by means of a 3-way valve 24, and a first fluid discharge pipe 26 of the heat transfer element. The first discharge pipe 26 is connected to a first inlet provided between the internal condenser 6 and the first expansion orifice 8 by means of a 3-way valve 28.

[0009] The regulating device further comprises a second cooling circuit for the electrochemical generator 1 in which the same fluid as in the air conditioning circuit is capable of circulating. The second cooling circuit of the electrochemical generator 1 comprises, in the direction of circulation of the fluid, a second conduit for supplying the fluid 30 to a heat transfer element associated with the electrochemical generator 1. The second supply line 30 is connected to a second outlet provided between the second expansion orifice 12 and the internal evaporator 14 by means of a 3-way valve 32, and a second fluid discharge pipe 34 of the heat transfer element. The second discharge pipe 34est connected to a second inlet provided downstream of the internal evaporator 14, between the internal evaporator 14 and the compressor 4, by means of the valve 20 which consists of a 4-way valve.

It should be noted that it should be understood for this description, that the air conditioning circuit comprises the first heating circuit and the second cooling circuit, even if generally for air conditioning, this mainly concerns the passage of gas through the second expansion orifice 12 (regulator). The first heating circuit and the second cooling circuit are nested one in the other and depend on the control of the various valves by the control means in order to fulfill their function.

The first supply pipe 22 and the second supply pipe 30du fluid to the heat transfer element of the electrochemical generator 1 are connected to said heat transfer element by a single 3-way valve 36. Similarly, the first discharge pipe 26 and the second discharge pipe 34du fluid from the heat transfer element are connected to said heat transfer element by a single 3-way valve 38. It is also possible to provide separate and independent connections to the heat transfer element. It is also possible to provide an exchanger between the valves 36, 38 and the electrochemical generator 1 in order to promote heat exchange.

The valves 24, 28, 32et 20 constitute the valves arranged to be able to put the air conditioning circuit in communication with one or the other of the first heating circuit and the second cooling circuit of the electrochemical generator 1.

The regulating device comprises means for controlling the valves 24, 28, 32, 20, 36 and 38 arranged to allow, depending on the temperature of the electrochemical generator 1, the circulation of the fluid from the air conditioning circuit in the first circuit of heating to heat the electrochemical generator 1 and / or the circulation of the fluid from the air conditioning circuit in the second cooling circuit to cool the electrochemical generator 1, in order to regulate its temperature.

Other means for controlling the valves of the air conditioning circuit are provided for the operation of said valves 18, 20et 21 for regulating the temperature of the passenger compartment, in addition to regulating the temperature of the electrochemical generator.

The control means are associated with temperature sensors of the electrochemical generator 1afin to actuate the valves according to the desired effect depending on whether the vehicle is stopped or running, and depending on the presence of a battery or of a fuel cell. According to Figures 1 to 5, the circulation of the gaseous fluid in the pipes in the embodiments is represented by darker lines. FIG. 1 represents the heating mode of battery 1 in charge with the vehicle stationary. FIG. 2 represents a cooling mode of battery 1 while charging with the vehicle stationary. FIG. 3 represents a mode of heating the passenger compartment and heating the battery 1le the vehicle being running. FIG. 4 represents a mode of air conditioning of the passenger compartment and cooling of the battery 1, the vehicle being running. Finally, FIG. 5 represents a mode of heating the passenger compartment and cooling of the battery 1, the vehicle being running.

More particularly, when the vehicle is stationary, the valve control means, the compressor 4, as well as all the electronic components are arranged to operate on the sector, the vehicle being connected to the sector, or not.

The valve control means can be arranged to make inoperative the internal condenser 6 and the internal evaporator 14 vis-à-vis the regulation of the temperature of the passenger compartment, when the vehicle is stationary, so that only the heating or cooling modes of the battery are operational.

When the outside temperature is cold, it is necessary to heat the battery or the fuel cell to facilitate starting of the vehicle, as well as to heat the battery to improve the efficiency of its charging. In this case of the heating mode of the electrochemical generator 1, the vehicle being stationary, and in the case of the battery, said battery being able to be charged, according to FIG. 1, the valve control means are arranged so that the fluid, which passes through the external condenser / evaporator 2, in contact with the cold air A, circulates to the accumulator 3 via the valves 18 and 20, then to the compressor 4, where it is compressed, and therefore heated, then sent, via the valve 24, in the first supply pipe 22 of the heating circuit of the electrochemical generator to the heat transfer element of the electrochemical generator 1 via the valve 36. As it passes, the fluid heats the heat transfer element, which heats the generator electrochemical 1. Then the fluid circulates in the first evacuation pipe 26 of the heating circuit of the electrochemical generator 1 via the valve 38, joins the air conditioning circuit via the valves 28, 21 and returns to the condenser / external evaporator 2 in pass ant through the first expansion port 8. In this mode, the internal condenser 6 and the evaporator 14 are not active.

If at the time of start-up, the electrochemical generator is too hot, or if at the time of charging, the battery is too hot, due to too hot outside air so that the electrochemical generator must be cooled, then the valve control means are arranged to switch to the cooling mode of the electrochemical generator, the vehicle being stationary. In the case of the battery, said battery can be charging, according to FIG. 2. The valve control means are then arranged so that the fluid which passes through the external condenser / evaporator 2, in contact with the hot air B, circulates to the second supply line 30 of the cooling circuit of the electrochemical generator via the valve 18, the second expansion orifice 12 where it is cooled, and the valve 32, to the heat transfer element of the battery 1 via the valve 36. During its passage, the fluid cools the heat transfer element which cools the electrochemical generator 1. Then the fluid circulates in the second discharge pipe 34 of the cooling circuit via the valve 38, joins the air conditioning circuit via the valve 20, to pass through the accumulator 3, the compressor 4 where it is compressed, the internal condenser 6 via the valve 24, said internal condenser being rendered inoperative with respect to the regulation of the passenger compartment by means of a shutter 40. Then the fluid circulates in bypass 10 via valves 21 and 28 then returns to the external condenser / evaporator 2, without passing through the first expansion port 8. In this mode, the internal condenser 6 and the evaporator 14 are not active vis-à-vis the regulation the temperature of the passenger compartment.

When the electrochemical generator is a battery, the valve control means are arranged to allow the circulation of the fluid in the first heating circuit to heat the battery until an optimum charging temperature is reached and to allow the circulation of the fluid of the air conditioning circuit in the second cooling circuit to cool the battery to find the optimum charging temperature, in order to charge the battery in the shortest possible time. In this case, the valve control means are arranged to switch from the battery heating mode, the vehicle being stationary and the battery charging, according to Figure 1, to the battery cooling mode, the vehicle being stationary and the battery charging, according to FIG. 2 and vice versa, automatically, as a function of the optimum temperature of the battery to be maintained in order to charge the battery in the shortest possible time. The optimum battery charging temperature can be between 5 and 25 ° C.

In the different cases described above, the management of the valve control means is done automatically, without human intervention. This is used in particular to maintain the temperature of the battery at an ideal charging temperature.

When the vehicle is stationary, it is possible to use the thermal energy supplied by the electrochemical generator 1 to regulate the temperature of the passenger compartment. It is thus possible to program the battery charging time to heat it sufficiently and take advantage of the heat given off by the battery during its charging in order to heat the passenger compartment or to cool it sufficiently and take advantage of the cold given off by the battery during its charging. load in order to cool the passenger compartment. In this case, the valve control means are arranged to allow the operation of the internal condenser 6 and of the internal evaporator 14 when the vehicle is stationary and to regulate the temperature of the passenger compartment in addition to the temperature of the electrochemical generator 1. Thus, the temperature of the passenger compartment is comfortable when the user takes his place in the vehicle to start it.

When the vehicle is running, the valve control means and the compressor 4 are arranged to operate on an electrochemical generator.

According to another variant, the valve control means are arranged to allow the operation of the internal condenser 6 and the internal evaporator 14 when the vehicle is running and to regulate the temperature of the passenger compartment in addition to the temperature of the generator electroch im iq ue.

More specifically, when the outside temperature is cold, the valve control means are arranged to switch the HVAC system to passenger compartment heating mode and to allow the circulation of the fluid from the air conditioning circuit in the first heating circuit of the electrochemical generator to heat the passenger compartment and the electrochemical generator when the vehicle is running, as shown in FIG. 3. In this case of the mode of heating the passenger compartment and of the electrochemical generator, the valve control means are arranged so that the fluid, which passes through the condenser / evaporator 2, in contact with the cold air A, circulates towards the accumulator 3 via the valves 18 and 20, then in the compressor 4 where it is compressed, and therefore heated, then sent , via the valve 24, on the one hand in the first supply pipe 22 of the heating circuit of the electrochemical generator to the heat transfer element of the electrochemical generator 1 via the valve 36, and on the other hand in the internal condenser 6. The fan of the air conditioning unit 16 is arranged to be open so that the cold air entering C is heated by passing through the internal condenser 6 before being sent into the passenger compartment for heat it up. Then the fluid returns to the condenser / external evaporator 2, passing through the first expansion orifice 8. On the side of the heating circuit of the electrochemical generator, the fluid heats the heat transfer element which heats the electrochemical generator 1. Then the fluid circulates in the first evacuation pipe 26 of the heating circuit of the electrochemical generator via the valve 38, joins the air conditioning circuit via the valves 28 and 21 and returns to the condenser / external evaporator 2 via the first expansion port 8. In this mode, the condenser internal 6 is active with regard to the regulation of the temperature of the passenger compartment. In this mode, the regulation device makes it possible to produce heat to heat the passenger compartment on the one hand and to heat the electrochemical generator on the other hand in order to maintain it at an optimum temperature to ensure better efficiency.

If the electrochemical generator becomes too hot when the vehicle is running, for example due to a very high traction power load, where the outside air is too hot, so that the electrochemical generator must be cooled, then the valve control means are arranged to switch the HVAC system to air conditioning mode of the passenger compartment. In addition, this makes it possible to authorize the circulation of the fluid from the air conditioning circuit in the second cooling circuit of the electrochemical generator to cool the passenger compartment and the electrochemical generator, in accordance with FIG. 4. The valve control means are then arranged. so that the fluid which passes through the condenser / external evaporator 2, in contact with the hot air B, is directed, via the valve 18, towards the second expansion orifice 12 where it is cooled, then towards the valve 32 where the fluid is divided on the one hand to the second supply line 30 of the cooling circuit of the electrochemical generator to the heat transfer element of the electrochemical generator 1 via the valve 36 and on the other hand to the internal evaporator 14. The fan of the air conditioning unit 16 is arranged to be opened so that the hot air entering D is cooled by passing through the internal evaporator 14 before being sent into the passenger compartment to cool it. Then the fluid returns to the air conditioning circuit via the valve 20. On the side of the cooling circuit of the electrochemical generator 1, the fluid, after having cooled the electrochemical generator 1, circulates in the second discharge pipe 34 of the cooling circuit via the valve 38, joins the air conditioning circuit via valve 20, to cross, with the fluid coming from the internal evaporator 14, the accumulator 3, the compressor 4 where it is compressed, the internal condenser 6 via the valve 24, said internal condenser being rendered inoperative vis-à-vis the regulation of the passenger compartment by means of the shutter 40. Then the fluid circulates in the bypass 10 via the valves 21 and 28, then returns to the external condenser / evaporator 2, without passing through the first orifice of expansion 8. In this mode, the control device makes it possible to produce cold to cool the passenger compartment on the one hand and to cool the electrochemical generator on the other hand in order to maintain it at a temperature. optimal to ensure better efficiency.

If the electrochemical generator becomes too hot when the vehicle is running, for example due to intensive operation, so that the electrochemical generator must be cooled but the outside air is cold and the passenger compartment must be heated, then the valve control means are arranged to switch the HVAC system to heating mode of the passenger compartment and to allow circulation of the fluid from the air conditioning circuit in the second cooling circuit of the electrochemical generator to heat the passenger compartment and cool the electrochemical generator, in accordance with FIG. 5. The valve control means are then arranged so that the fluid, which passes through the condenser / evaporator 2, in contact with the cold air A, is directed via the valve 18, d 'on the one hand directly to the valve 20 and on the other hand to the second expansion orifice 12 where it is cooled then, via the valve 32, in the second supply line 30 of the refrigeration circuit oidissement of the electrochemical generator to the heat transfer element of the electrochemical generator 1 via the valve 36. The fluid, after having cooled the electrochemical generator 1, circulates in the second discharge pipe 34 of the cooling circuit via the valve 38, and joins the air conditioning circuit via the valve 20 to cross, with the fluid coming directly from the valve 18, the accumulator 3, the compressor 4 where it is compressed, and the internal condenser 6 via the valve 24. The fan of the air conditioning unit 16 is arranged to be open so that the cold air entering E is heated by passing through the internal condenser 6 before being sent into the passenger compartment to heat it. Then the fluid passes through the first expansion orifice 8 via the valve 21 and returns to the external condenser / evaporator 2. In this mode, the control device makes it possible to produce heat to heat the passenger compartment on the one hand and to produce cold to cool down. the electrochemical generator on the other hand in order to maintain it at an optimum temperature to ensure better efficiency, the heat produced by the electrochemical generator being used to heat the passenger compartment.

In these three temperature regulation modes where the car is running, the management of the valve control means is done semi-automatically, the user intervening to switch the HVAC system to heating mode or to mode. air conditioning of the passenger compartment to regulate the temperature of the passenger compartment, the temperature of the electrochemical generator being managed automatically by means of the temperature sensors.

US patent 10,168,079B2 describes a device with refrigeration cycles, in particular the battery. However, it is not intended to recover thermal energy from an element of the vehicle to heat or cool, for example the battery or for the passenger compartment of the vehicle. In addition, it is only used in the air conditioning circuit a very rough gas-air exchanger and without the possibility of regulating the temperature of the battery precisely.

Summary of the invention

The invention aims in particular to overcome the various drawbacks of electrochemical generators equipping known electric or hybrid vehicles and to provide for connecting in the heating circuit or the cooling circuit also at least one electric motor of the vehicle and to the minus an electronic control circuit and an electrochemical generator for the recovery and regulation of thermal energy to optimize the overall efficiency of such a vehicle and transform the thermal losses into positive energy for the temperature regulation in the passenger compartment.

More specifically, an objective of the invention is to provide a device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator, such as a battery or fuel cell or hybrid, with an HVAC system allowing in particular the recovery of thermal energy for the electrochemical generator in order to optimize its energy efficiency. The recovery of the thermal energy for heating or cooling is also provided for at least the electric motor and at least the electronic control circuit in connection with the electrochemical generator, or even also with the braking energy, in order to increase the power. autonomy of the vehicle.

Another objective of the invention, when the electrochemical generator is a battery, is to provide a device for recovering thermal energy during the charging of the battery in order to optimize the charging time and make it as efficient as possible. short possible.

To this end, the present invention relates to a device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator, which comprises the characteristics of independent claim 1.

Particular embodiments of the device for recovering and regulating thermal energy are defined in dependent claims 2 to 11.

Thus, the device for recovering and regulating thermal energy of the invention makes it possible to optimize the energy efficiency of the electrochemical generator, and in conjunction with the electric traction motor and the electronic control circuit in order to increase the autonomy of the vehicle. In addition, when the electrochemical generator is a battery, the device for recovering and regulating thermal energy of the invention makes it possible to optimize the charging time of the battery by making it as short as possible.

An advantage of the thermal energy regulation recovery device lies in the fact that the electronic control traction motor is linked to the heating circuit or to the cooling circuit with the battery, which makes it possible to avoid any loss of thermal energy and ensure that the vehicle has an increase in its range before another charge of the battery.

Brief description of the drawings

Other characteristics and advantages of the invention will emerge more clearly on reading the following description of various embodiments of the invention, given by way of simple illustrative and non-limiting examples, and from the appended figures, among which: FIG. 1 represents a diagrammatic view of a device for regulating the temperature of an electrochemical generator of an electric vehicle, the vehicle being stationary and the battery in charge of the prior art, FIG. 2 represents a schematic view of a device for regulating the temperature of an electrochemical generator of an electric vehicle, the vehicle being stationary and the battery charging of the prior art, FIG. 3 shows a schematic view of a device for regulating the temperature of an electrochemical generator of an electric vehicle, the vehicle being in motion of the prior art, FIG. 4 shows a schematic view of a regulating device. ulation of the temperature of an electrochemical generator of an electric vehicle, the vehicle being in motion of the prior art, FIG. 5 shows a schematic view of a device for regulating the temperature of an electrochemical generator of a vehicle electric, the vehicle being in motion of the prior art, FIG. 6 shows a schematic view of a first embodiment of the device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator according to the invention , FIG. 7 shows a schematic view of a second embodiment of the device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator according to the invention, FIG. 8 shows a schematic view of a third form execution of the device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator according to the invention, and FIG. 9 shows te an arrangement of the electric motor, of the electronics, of the electrochemical generator and of a braking circuit for the recovery of thermal energy from the braking circuit and the direct charging of the electrochemical generator by the motor according to the invention.

Detailed description of the preferred embodiments

In the present description, the term "electrochemical generator" designates the batteries and fuel cells used in electric or hybrid vehicles, indicated in the figures by the reference 1indifferently for a battery or a fuel cell. In addition, a device for recovering and regulating thermal energy is defined rather than a device for regulating the temperature of an electrochemical generator as described with reference to FIGS. 1 to 5 of the state of the art.

The device for recovering and regulating the thermal energy of the electrochemical generator vehicle of the present invention comprises an air conditioning circuit identical to what has been described with reference to the preceding figures 1 to 5 in the prior art . All the components of said device and the various operating modes illustrated by the preceding figures 1 to 5 will not therefore be fully repeated. Everything relating to the operation of the various elements of the device at the level of the air conditioning circuit is identical and does not apply. will not be repeated. Only the new components linked to the heating circuit or to the cooling circuit of the air conditioning circuit device will be described in detail and their capacity to recover energy in order to supply it to another component of the device. The importance of this invention is to be able to use the thermal energy for heating or cooling certain components in operation and linked to the heating circuit or to the cooling circuit to heat or cool, for example, the passenger compartment of the electric vehicle without significant loss. thermal energy.

[0040] FIG. 6 represents a first embodiment of the new device for recovering and regulating thermal energy of the vehicle with an electrochemical generator 1, which comprises an air conditioning circuit for an HVAC system in the passenger compartment of the vehicle. It is presented for example according to this first embodiment seen in FIG. 6 and in principle equivalent to FIG. 5, a mode of passenger compartment heating and cooling of the electrochemical generator 1, with at least one electric motor 5 and at least one electronic circuit. 7or electronic. However, all the components of FIG. 6 are described with the new arrangement of at least the electric motor 5 and of at least the electronic circuit 7 in connection with the electrochemical generator 1. The electric motor or motors 5 are for traction of the vehicle, while the electronic circuit 7 can be used to control the electric motor (s) 5.

As described with reference to Figures 1 to 5, said air conditioning circuit therefore comprises an air conditioning circuit of an HVAC system of the vehicle interior, in which a fluid circulates. The fluid, for example refrigerant, such as a refrigerant gas, circulates in particular in various conduits. This air conditioning circuit comprises at least one external condenser / evaporator 2, generally located at the front of the vehicle, a compressor 4, preferably at high speed, an internal condenser 6 to heat the passenger compartment, a first expansion orifice 8 provided downstream of the internal condenser 6 between the internal condenser 6 and the external condenser / evaporator 2, an internal evaporator 14 to cool the passenger compartment, a second expansion port 12 provided upstream of the internal evaporator 14, between the external condenser / evaporator 2 and the internal evaporator 14.

The device for recovering and regulating thermal energy further comprises a first circuit for heating or recovering thermal energy in particular for heating the electrochemical generator 1 and a second circuit for cooling or recovering thermal energy in particular for cooling. of the electrochemical generator 1 in which the said fluid circulates. According to the present invention in this first embodiment of FIG. 6, there is also provided in connection with the air conditioning circuit and the electrochemical generator 1, at least one electric motor 5, for example a traction motor of the vehicle, and at the same time. at least one electronic circuit 7, for example for controlling the electric motor or motors provided. The electronic circuit 7 or electronic concerns both the control electronics of the motor (s) 5, as well as the valve control means, the control of the temperature sensor (s), a DC-DC conversion means, the load control of the battery, in conjunction with a braking circuit or other components.

The electric motor or motors 5 and at least the electronic circuit 7 are also used for the recovery of thermal energy for heating or cooling such as the electrochemical generator 1. The electric motor or motors 5 and at least the electronic circuit 7 are arranged in a connection in parallel with the electrochemical generator 1in connection to the first heating circuit or to the second cooling circuit as explained below. This is an ideal configuration, because it is possible to measure the temperature of each element separately, which allows a well differentiated adaptation for a heating or cooling operation by recovery of thermal energy of the motor (s) 5, of the electronic circuit. 7 or electrochemical generator 1.

A braking circuit 9 can still be provided and mounted in parallel with the electric motor (s) 5, the general electronic or electronic circuit 7 and the electrochemical generator 1. This braking circuit 9 comprises essentially a resistor through which an electric current passes following the triggering of a braking of the vehicle by disc brakes or by braking by an electric motor 5. The resistor, connected by electric wires represented symbolically in FIG. 6, heats up during braking and heats the gas or the liquid surrounding the resistor. This gas or this liquid is transmitted in the pipes of the first heating circuit or of the second cooling circuit, passing through the battery 1 and at the level of the electric motor (s) 5 and of all the electronics 7. Thermal energy is essentially supplied. and allows it to be transmitted into one of the heating or cooling circuits to provide positive heating energy to the passenger compartment. This thermal energy can also be used to heat the electrochemical generator 1.

When there is a high speed of the electric vehicle, the emergency braking with the electric motor (s) 5 does not allow a charge to be carried out directly from the electrochemical generator 1, because there are too strong flow currents in the engine. As shown schematically in FIG. 9, it is first of all possible to pass the energy in the electric resistance 9 by passing through the electronics 7. Two electric power wires are connected at the output of the motor or motors 5 and at the input of. the electronics 7, which connects at the output by two electric wires, the two wires of the resistance of the braking circuit 9. A recovery of thermal energy is carried out at the output of the braking circuit 9 in connection with the HVAC system and of the first circuit of heating or the second cooling circuit. When the power decreases in the motor (s) 5 at that time, the charging of the electrochemical generator 1 can be started with the electric power at the output of the electric motor (s) 5, passing through the electronics 7. Thus, one can imagine a vehicle without brakes. hydraulic, which allows us to recover 100% of either thermal or electrical braking energy to charge the electrochemical generator 1. The electrical or thermal energy is therefore not lost and constitutes a positive energy for charging or heating the electrochemical generator 1.

It can be imagined four electric motors 5, that is to say a motor in each wheel of the vehicle, and performing a very secure and independent braking for each wheel. A braking circuit 9 can be mounted on each wheel of the vehicle with each electric motor 5. It should be noted that the circulation of the fluid, such as gaseous fluid in the pipes in FIGS. 6 to 8 is only illustrated for the second circuit of cooling as in figure 5. The circulation of the fluid is represented by darker lines. However, the parts of the first heating circuit or for recovering thermal energy from heating are also described below.

The first heating circuit or thermal energy recovery for heating the electrochemical generator 1 and at least the electric motor 5 and the electronic circuit 7, or even the braking circuit 9 comprises a first fluid supply line 22. This first fluid supply pipe 22 brings the fluid to a heat transfer element associated with the electrochemical generator 1 and to pipe portions of at least the motor 5 and of at least the electronic circuit 7, or even the braking circuit 9. The first heating circuit or heating thermal energy recovery further comprises a first fluid discharge pipe 26 of the heat transfer element and pipe portions of at least the motor 5 and of the electronic circuit 7. The first discharge pipe fluid 26 is connected to a first inlet of a 3-way return valve 28 between the internal condenser 6 and the first expansion port 8.

The first supply line 22 is connected to a first outlet of a first 3-way valve 24 provided between the compressor 4 and the internal condenser 6, and to a first inlet of a second 4-way valve 36. The fluid is transmitted from a first outlet of the second valve 36 to the heat transfer element associated with the electrochemical generator 1, and from a second outlet of the second valve 36 to an inlet of a first complementary 4-way valve 37. A first outlet of this first complementary valve 37 is connected to the pipe portions of at least the electric motor 5, while the second output of the first complementary valve 37 is connected to the pipe portions of at least the electronic circuit 7 and the third output of the first complementary valve 37 is connected to the circuit braking 9 put in parallel with the electrochemical generator 1, the electric motor (s) 5 and the electronic circuit 7. The outputs of at least the electric motor 5, at least the electronic circuit 7 and the braking circuit 9 are connected to inputs of a second complementary 4-way valve 39, the output of which is connected to an input of a link valve 41, of which the other input is connected to the heat transfer element of the electrochemical generator 1. The output of this link valve 41 is connected to a first input of a third 3-way valve 38, a first output of which from the third valve 38 joins the air conditioning circuit via the valves 28 and 21 and returns to the condenser / external evaporator 2 through the first expansion port 8.

As shown in Figure 6, the second cooling circuit or recovery of thermal energy for cooling the electrochemical generator 1 and at least the electric motor 5 and at least the electronic circuit 7 and the brake circuit 9 comprises a second fluid supply pipe 30. This second fluid supply pipe 30 brings the fluid to a heat transfer element associated with the electrochemical generator 1 and to pipe portions of at least the motor 5 and of at least the electronic circuit 7 and of the braking circuit 9. The second cooling or cooling thermal energy recovery circuit comprises a second fluid discharge pipe 34 from the heat transfer element associated with the electrochemical generator 1 and with pipe portions of at least the motor 5 and at least the electronic circuit 7 and the braking circuit 9.

According to the second cooling circuit or recovery of thermal cooling energy, the fluid, which passes through the condenser / external evaporator 2, circulates to the accumulator 3 via the valves 18 and 20 controlled by the control means, then in the compressor 4, where it is compressed, and therefore heated, then sent, to the valve 24. The fluid also circulates in the direction of the second expansion orifice 12 through the valve 18. The second fluid supply line 30 is connected to a second outlet a fourth 3-way valve 32 provided between the second expansion orifice 12 and the internal evaporator 14, and to a second inlet of the second 4-way valve 36 while the second fluid discharge line 34 of the heat transfer element passes through a second outlet of the third valve 38et is connected to a second inlet of the fifth 4-way valve 20 provided downstream of the internal evaporator 14, between the internal evaporator 14 and the compressor 4. The energy A by the con denser / external evaporator 2 is added in the compressor 4 to the energy coming from the assembly composed by the electrochemical generator 1 and at least the electric motor 5 and at least the electronic circuit 7 and the brake circuit 9. A hot fluid enters the internal condenser 6 through valve 24 and a colder outlet from the internal condenser 6 to pass through the first expansion port 8 via valve 21 and return to the external condenser / evaporator 2.

As already specified above, several valves 18, 20, 21, 24, 28, 32, 36, 37, 38, 39 and 41 are arranged to be able to put the air conditioning circuit in communication with one or the other of the first heating circuit and of the second cooling circuit of the electrochemical generator 1 and of at least one electric motor 5 and of at least one electronic circuit 7 and the braking circuit 9. In addition, means are provided for controlling said valves 18 , 20, 21, 24, 28, 32, 36, 37, 38, 39 and 41 arranged to allow the circulation of the fluid of the air conditioning circuit in the first heating circuit or in the second cooling circuit.

Depending on the temperature measured by at least one temperature sensor, which is associated with the control means of the electrochemical generator 1 and at least the electric motor 5 and at least the electronic circuit 7 together or separately or even the control circuit braking 9, the circulation of the fluid can go into the first heating circuit to heat the electrochemical generator 1 and the electric motor 5 and the electronic circuit 7 and the braking circuit 9, or to recover the thermal energy for heating the electrochemical generator 1, of the electric motor 5 and of the electronic circuit 7 and possibly of the braking circuit 9. The circulation of the fluid can also go into the second cooling circuit to cool the electrochemical generator 1 and the electric motor 5 and the electronic circuit 7, or even the braking circuit 9, or to recover thermal energy for cooling the electrochemical generator 1, the electric motor 5 and of the electronic circuit 7, or even of the braking circuit 9. This first serves to regulate the temperature of the electrochemical generator 1 and / or of the electric motor 5 and / or of the electronic circuit 7, but can also be used to use heat or heat. cold coming from the electrochemical generator 1, from the electric motor 5 and from the electronic circuit 7, in particular for heating or cooling the passenger compartment of the vehicle.

As previously indicated with reference to Figures 1 to 5, the air conditioning circuit may further comprise in a first loop a bypass 10prévue between the internal condenser 6 and the external condenser / evaporator 2, at the first expansion orifice 8. At the level of the internal evaporator 14, a fan 16 of the air conditioning unit may be provided. The circulation in the first loop or in the second loop and the bypass is managed by means of the valves 18 and 20, which are provided at the intersection of the first loop and the second loop, and the valve 21 provided at the intersection of the first loop and of the bypass 10, upstream of the first expansion orifice 8. These valves are for example solenoid valves with at least 3 ways, or even at least 4 ways.

[0054] FIG. 7 represents a second embodiment of the new device for recovering and regulating thermal energy of the vehicle with an electrochemical generator 1, which comprises an air conditioning circuit for an HVAC system in the passenger compartment of the vehicle. As previously, according to this second embodiment seen in FIG. 7, there is presented a mode of heating the passenger compartment and cooling of the electrochemical generator 1, with at least one electric motor 5 and at least one electronic circuit 7. It is also possible to envisage d 'have a braking circuit 9. As this FIG. 7 includes a large part of identical components and an operation equivalent to those of FIG. 6, only the differences with respect to the first embodiment will be described.

At least one electric motor 5 and at least one electronic circuit 7 are arranged in a series connection with the electrochemical generator 1 and in connection with the first heating circuit or the second cooling circuit. A braking circuit 9 can also be mounted in series with the electrochemical generator 1, the electric motor or motors 5 and the electronic circuit 7. In this configuration, the temperature measurement of each element, namely the electrochemical generator 1, the electric motor 5 of traction, the electronic control circuit 7 and the braking circuit 9, is carried out by a temperature sensor to provide a common temperature and to make it possible to recover heat or cold from each of the elements to be used to heat or cool the passenger compartment of the vehicle, or even to charge the electrochemical generator 1 as explained above.

The connection to the first heating circuit or to the second cooling circuit is effected only by the second 3-way valve 36 and by the third 3-way valve 38 as the electrochemical generator 1, the electric motor 5de traction, the electronic circuit 7de piloting and the braking circuit 9 are connected in series.

FIG. 8 represents a third embodiment of the new device for recovering and regulating thermal energy of the vehicle with an electrochemical generator 1, which comprises an air conditioning circuit for an HVAC system in the passenger compartment of the vehicle. As previously, according to this third embodiment seen in FIG. 8, there is presented a mode of heating the passenger compartment and cooling of the electrochemical generator 1, with at least one electric motor 5 and at least one electronic circuit 7 and one braking circuit 9. As this FIG. 8 comprises a large part of the identical components and of an operation equivalent to those of FIG. 6, only the differences with respect to the first embodiment will be described.

At least one electric motor 5, at least one electronic circuit 7 and for example a braking circuit 9 are arranged in a series connection with the electrochemical generator 1 and are connected by pipes in which circulates water as fluid or a other liquid (glycol). To do this, there is provided a liquid circulation pump 13 and an exchanger 11 receiving the liquid at the inlet of the assembly, which comprises the electrochemical generator 1, the electric motor 5, the electronic circuit 7 and the braking circuit 9. A connection is made either to the first heating circuit or to the second cooling circuit at the external inlet of the exchanger, which receives the gaseous fluid. Advantageously, a gas-liquid exchanger 11 is used and not a gas-air exchanger.

As before, the temperature measurement of each element, namely the electrochemical generator 1, the electric traction motor 5, the electronic control circuit 7 and the braking circuit 9, is carried out by a single temperature sensor to provide a common temperature and in order to make it possible to recover heat or cold from each of the elements to be used for heating or cooling the passenger compartment of the vehicle, or even for charging the electrochemical generator 1 as explained previously.

Of course, other elements of the electric vehicle can be considered, arranged in the closed circuit of the air conditioning circuit, in particular for the recovery of thermal energy. Mention may in particular be made of the connection with a braking circuit of the vehicle where a resistor capable of heating up during braking can be used. This resistor can be arranged in connection with the first heating circuit or the second cooling circuit. And under these conditions, heat can be taken or recovered to be transmitted into the vehicle to heat the passenger compartment. The circuit linked to the braking circuit can be in direct connection via the resistor with the first heating circuit or the second cooling circuit. Thus any element capable of heating or cooling the electric vehicle can be used in conjunction with the air conditioning circuit to recover heat or cold to be transmitted in particular into the passenger compartment of the vehicle.

Of course, the present invention is not limited to the examples illustrated and is susceptible of various variants and modifications which will be evident to those skilled in the art. Other combinations are of course possible with what is already known with the electrochemical generator, the electric traction motor or motors, and the electronic control circuit of the motor or motors.

Claims (11)

1. Device for recovering and regulating thermal energy of an electric vehicle with an electrochemical generator (1), said electrochemical generator (1) being chosen from the group comprising batteries and fuel cells or hybrids, said regulating device comprising an air conditioning circuit of an HVAC system of the vehicle interior, in which a fluid circulates, said air conditioning circuit comprising at least one external condenser / evaporator (2), a compressor (4), an internal condenser (6) ) intended to heat the passenger compartment, a first expansion orifice (8) provided downstream of the internal condenser (6) between the internal condenser (6) and the external condenser / evaporator (2), an internal evaporator (14) intended for cool the passenger compartment, a second expansion orifice (12) provided upstream of the internal evaporator (14), between the external condenser / evaporator (2) and the internal evaporator (14), said device for recovering and regulating thermal energy comprising a first circuit for heating or recovering thermal energy from the electrochemical generator (1) and a second circuit for cooling or recovering thermal energy from the electrochemical generator (1) in which circulates said fluid, said first heating circuit of the electrochemical generator (1) comprising a first supply pipe for the fluid (22) to a heat transfer element associated with the electrochemical generator (1), said first supply pipe (22) being connected to a first outlet provided between the compressor (4) and the internal condenser (6), and a first fluid discharge line (26) from the heat transfer element, which is connected to a first inlet provided between the internal condenser (6) ) and the first expansion orifice (8), said second cooling circuit of the electrochemical generator (1) comprising a second conduit for supplying the fluid (30) to a calop element orteur associated with the electrochemical generator (1), said second fluid supply pipe (30) being connected to a second outlet provided between the second expansion orifice (12) and the internal evaporator (14), and a second pipe d 'fluid discharge (34) from the heat transfer element, which is connected to a second inlet provided downstream of the internal evaporator (14), between the internal evaporator (14) and the compressor (4), several valves ( 24, 28, 32, 20, 36, 38) being arranged to be able to put the air conditioning circuit in communication with one or the other of the first heating circuit and the second cooling circuit of the electrochemical generator (1), and means for controlling said valves (24, 28, 32, 20, 36, 38) arranged to allow, depending on the temperature of the electrochemical generator (1), the circulation of the fluid from the air conditioning circuit in the first heating circuit for heat the electrochemical generator (1) or recover energy ther heating of the electrochemical generator (1) as well as the circulation of the fluid from the air conditioning circuit in the second cooling circuit to cool the electrochemical generator (1) or recover thermal energy for cooling the electrochemical generator (1), characterized in that the device for recovering and regulating thermal energy further comprises at least one electric motor (5), and at least one electronic circuit (7) arranged to be connected to the first heating circuit or to the second heating circuit. cooling in connection with the electrochemical generator (1), at least the electric motor (5) and at least the electronic circuit (7) being suitable for recovering thermal energy for heating or cooling. 2. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5) and at least the electronic circuit (7) are arranged in a circuit in parallel with the electrochemical generator. (1) in connection with the first heating circuit or the second cooling circuit. 3. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5) and at least the electronic circuit (7) are arranged in a series connection with the electrochemical generator. (1) in connection with the first heating circuit or the second cooling circuit. 4. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5) and at least the electronic circuit (7) are arranged in a series connection with the electrochemical generator. (1) by being connected by conduits in which a liquid circulates as a fluid, in that it further comprises a pump (13) for circulating the liquid and a gas-liquid heat exchanger (11) receiving the liquid at a input of the assembly, which comprises the electrochemical generator (1), the electric motor (5) and the electronic circuit (7), and in that a connection is made either to the first heating circuit or to the second cooling circuit at the external inlet of the exchanger, which receives the gaseous fluid. 5. Device for recovering and regulating thermal energy according to claim 1, characterized in that it comprises a braking circuit (9) of the vehicle with a resistor capable of heating during braking, said resistor being arranged in connection with the first heating circuit or the second cooling circuit for thermal energy recovery. 6. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5), at least the electronic circuit (7) and a braking circuit (9) are arranged in a parallel connection with the electrochemical generator (1) in connection with the first heating circuit or with the second cooling circuit. 7. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5), at least the electronic circuit (7) and a braking circuit (9) are arranged in a series connection with the electrochemical generator (1) linked to the first heating circuit or to the second cooling circuit. 8. Device for recovering and regulating thermal energy according to claim 1, characterized in that at least the electric motor (5), at least the electronic circuit (7) and a braking circuit (9) are arranged in an assembly in series with the electrochemical generator (1) being connected by pipes in which a liquid circulates as a fluid, in that it further comprises a pump (13) for circulating the liquid and a heat exchanger (11) gas-liquid receiving the liquid at an inlet of the assembly, which comprises the electrochemical generator (1), the electric motor (5) and the electronic circuit (7), and in that a connection is made either to the first circuit heating or to the second cooling circuit at the external inlet of the exchanger, which receives the gaseous fluid. 9. Device for recovering and regulating thermal energy according to one of claims 6 to 8, characterized in that the braking circuit (9) essentially comprises a resistor through which an electric current passes following the initiation of a braking of the vehicle. , the resistor heats up during braking and heats a gaseous or liquid fluid surrounding the resistor to provide thermal energy for heating the passenger compartment or the electrochemical generator (1). 10. Device for recovering and regulating thermal energy according to one of claims 6 to 8, characterized in that it comprises four electric motors (5) traction, with a motor in each wheel of the vehicle, allowing to perform secure and independent braking for each wheel while recovering more precise thermal energy from the braking circuit. 11. Device for recovering and regulating thermal energy according to claim 10, characterized in that a braking circuit (9) is mounted on each wheel of the vehicle with each electric motor (5).