WO2019008000A1

WO2019008000A1 - Device for thermally controlling battery modules

Info

Publication number: WO2019008000A1
Application number: PCT/EP2018/068014
Authority: WO
Inventors: Jean Damien MULLER; Bruno Payen
Original assignee: Valeo Systemes Thermiques
Priority date: 2017-07-06
Filing date: 2018-07-03
Publication date: 2019-01-10
Also published as: FR3068773A1; FR3068773B1

Abstract

The present invention relates to a device (1) for thermally controlling, particularly for cooling, at least one electrical power storage element (3). According to the invention, the thermal control device (1) comprises a base plate (10), on which at least two juxtaposed stamped plates (11) are rigidly connected, said base plate (10) or said stamped plates (11) being intended to come into thermal contact with said at least one electrical power storage element (3), each of said at least two stamped plates (11) defining, with said base plate (10), a heat transfer fluid circulation duct (12) comprising two spiral shaped channels (121, 122) that are interleaved together, said channels (121, 122) being in fluid communication with each other at the centre of the double spiral, said thermal control device (1) comprising a single input (E) and a single output (S) for heat transfer fluid connected to each of the heat transfer fluid circulation ducts (12).

Description

Thermal regulation device of battery modules.

1. Field of the invention

The invention relates to the field of thermal regulation of batteries, and more particularly batteries fitted to a motor vehicle whose propulsion is provided in whole or in part by an electric motor.

More specifically, the invention relates to the field of thermal regulation devices for battery modules. 2. Prior Art

In the field of electric and hybrid vehicles, the electric energy storage cells are interconnected in order to create an electrical generator of desired voltage and capacity, and positioned in a battery module (called "module" in which follows).

During the operation of the vehicle, the battery modules - usually located at the floor of the vehicle - may be subject to temperature variations that may in some cases cause damage or destruction.

Therefore, the thermal regulation of the modules is essential in order, on the one hand, to maintain them in good condition and, on the other hand, to ensure the reliability, autonomy, and performance of the vehicle.

Automakers are also seeking today to provide more powerful electric or hybrid vehicles with increased electric range.

For this, a growing number of modules is embedded in vehicles.

Thus, the modules cover a more and more consistent surface of the vehicle floor and they even sometimes form the bottom of the vehicle.

Devices for regulating the temperature of these modules must therefore extend to equivalent surfaces to optimize the operation of the modules.

A thermal regulation device is conventionally positioned directly in contact with the modules, or indirectly in contact with the modules. Such a thermal regulation device is traversed by a heat transfer fluid and performs the functions of heating and / or cooling of the modules.

The heat transfer fluid can thus absorb the heat emitted by each module to cool or as needed, it can bring him heat if the temperature of the module is insufficient for its proper operation.

Two technologies of thermal regulation devices of the battery modules of a vehicle are known, namely tube technology, and plate technology.

In the first technology, the thermal regulation device consists of a plurality of tubes comprising fluid circulation channels whose ends are connected by collectors so as to form a circulation circuit of a coolant.

This tube control device technology is relatively simple to implement but has a major disadvantage in that it does not allow to create complex fluid circulation circuits adapted to the new size constraints of the batteries.

In the second technology, the thermal control device is constituted by a flat plate (conventionally called "flat base" in English) on which is crimped or riveted a plate which has been stamped (commonly called "channel plate" in English) so to form a recessed impression with an inlet and a fluid outlet.

Once the flat and stamped plates assembled on one another, the recessed impression forms a conduit or circuit in which the heat transfer fluid can flow from a fluid inlet to a fluid outlet.

In a variant, the flat plate is replaced by a stamped plate.

This second technology makes it possible to create, by the implementation of stamped plates, heat transfer fluid flow circuits of complex shapes, which make it possible to homogenize the temperature of the modules.

Nevertheless, a disadvantage of this plate technology lies in the fact that the manufacture of large stamped plates is complex and expensive because it requires the use of large presses. To solve this problem, it has been proposed to associate a thermal regulation device with plates to each of the modules of the battery.

A disadvantage of this solution lies in the fact that the multiple thermal control devices must be interconnected to allow the distribution of heat transfer fluid, which complicates the assembly and increases the risk of leakage of the heat transfer fluid.

3. Summary of the invention

The present invention aims to solve these problems of the state of the art and proposes a device for thermal regulation, including cooling, of at least one electrical energy storage element (called "module" in the description which follows, according to the invention, comprises a base plate on which at least two juxtaposed stamped plates are secured, said base plate or said stamped plates being intended to come into thermal contact with said at least one storage element. of electrical energy, each of said at least two stamped plates delimiting, with said base plate, a coolant circulation duct comprising two spiral-shaped channels nested one inside the other, said channels being fluidly connected to one another; to the other in the center of the double spiral, said thermal regulating device comprising a single inlet and a single heat transfer fluid outlet connected to each of the heat transfer fluid circulation ducts.

The invention thus proposes a device for the thermal regulation of large battery modules of a hybrid or electric vehicle, which implements a single base plate on which a plurality of juxtaposed stamped plates are secured.

Each battery module is composed of several electric cells.

Once the stamped plates assembled on the base plate, the assembly forms a single circuit in which a heat transfer fluid can flow from a fluid inlet to a fluid outlet.

Each stamped plate forms with the base plate a heat exchange plate in which is formed a conduit having a double spiral shape. The thermal regulation device is thus composed of several double spiral ducts interconnected in the same fluid circuit, which does not require connection pipes.

A double spiral shape of the circulation duct in each stamped plate allows:

an improved heat exchange between the fluid entering and the fluid leaving each heat exchange plate, and

- A homogeneous distribution of the temperature over the entire surface of the heat exchange plate and thus improves the heat exchange with the battery on the entire surface of the latter.

In addition, with a conduit formed of two intermeshing spiral channels in the other, equivalent heat exchange plate size, the heat exchange surface between the battery and the heat transfer fluid is increased, which increases all the efficiency of the heat exchange plate.

The spiral shapes of the channels also allow a good definition of the walls of the conduit and thus allows a good distribution of the mass of the battery on the heat exchange plate which is an advantage to have a good coefficient of heat exchange between these two elements.

The base plate, which is a cut metal sheet, may have dimensions equal to those of the battery while each stamped metal plate of the device may have dimensions equal to those of a module or group of modules (it can be provided a plate stamped by module or group of modules to thermally regulate).

This solution makes it possible to easily manufacture, and at a relatively low cost, large and complex shaped thermal regulation devices adapted to batteries having large sizes.

The solution of the invention therefore does not require a large press to stamp the plates, which reduces the manufacturing costs of the device of the invention.

Because it is made by assembling a plurality of stamped plates on a base plate, the thermal control device of the invention is flexible and can be adapted to the size and size of the battery modules to be cooled. According to a particular aspect of the invention, the surfaces of the base plate are flat.

Thus, the base plate is a simple sheet, for example aluminum, which is cut only to the shape and dimensions desired (it is not stamped).

The manufacturing cost of such a base plate is relatively low. Preferably, it is the base plate of the thermal regulation device which is in contact (direct or indirect) with the electrical energy storage elements, and which constitutes the heat exchange plate.

Indeed, it is simpler and less expensive to ensure the flatness of the base plate than the stamped plates.

According to another aspect of the invention, each conduit has a rectangular double spiral shape.

This rectangle spiral type profile optimizes the surface of the heat exchange plate and provides a larger exchange surface possible.

According to one aspect of the device according to the invention, the heat transfer fluid inlets of the plurality of heat exchange plates are connected to a common heat transfer fluid inlet and the heat transfer fluid outlets of the plurality of heat exchange plates are connected. to a common heat transfer fluid evacuation.

This type of connection allows temperature homogeneity at each heat exchange plate of the device and over the entire exchange surface of said device.

According to another particular aspect of the invention, each duct has at least three distinct and spaced zones for circulating the coolant against the current, intended to be placed opposite the electrical energy storage elements to be regulated. thermally.

According to another particular aspect of the invention, each of said at least three zones comprises three portions of the two channels, two portions allowing a circulation of the coolant in a first direction and a portion allowing a circulation of the heat transfer fluid in the opposite direction, to against the current. According to another particular aspect of the invention, the width of said at least three zones is substantially equal to the width of the electrical energy storage elements to be thermally regulated.

According to another particular aspect of the invention, at least a portion of the conduits comprises at least one heat transfer passage restriction for balancing the heat transfer fluid flows in the conduits.

According to another particular aspect of the invention, one of said stamped plates is connected on the one hand to an input connector allowing the supply of heat transfer fluid to said thermal regulation device, and on the other hand to an output connector allowing the evacuation of the heat transfer fluid out of the thermal regulation device.

According to another particular aspect of the invention, said base plate, said at least two stamped plates and said input and output connectors are joined by brazing.

According to another particular aspect of the invention, the surfaces of the base plate are flat.

According to another particular aspect of the invention, the base plate and said at least two stamped plates are secured by brazing.

The stamped plates are brazed together and soldered to the base plate. This inexpensive joining technique ensures the device of the invention a strong mechanical strength.

According to yet another particular aspect of the invention, said at least two stamped plates overlap partially.

This aspect makes it possible, on the one hand, to facilitate soldering of all the plates together and, on the other hand, to ensure the sealing of the coolant circulation circuit in the device.

This also makes it possible to avoid the use of connection ducts for plates stamped together.

Thus, the assembly is simplified and the risks of leakage of the heat transfer fluid are reduced.

The thermal control device is therefore in the form of a row of stamped plates juxtaposed. This modular structure simplifies the assembly of the device while adapting its shape to that of the battery and its dimensions to the number of modules constituting the battery.

According to one aspect of the invention, each stamped plate is intended to regulate the temperature of a module or group of modules.

According to another particular aspect of the invention, different heat transfer fluid circulation circuits can be configured in each stamped plate.

According to another particular aspect of the invention, the base plate has a shape corresponding to the shape of the battery containing the elements (or modules) for storing electrical energy.

According to yet another aspect of the invention, the base plate constitutes the bottom of the vehicle in which the thermal regulation device is implemented.

4. Figures

Other features and advantages will appear more clearly on reading the following detailed description of particular embodiments of the invention, given as simple illustrative and non-limiting examples, and the appended drawings, among which:

Figure 1 is a top view of modules of a vehicle battery and a thermal control device of these modules according to a first embodiment of the invention;

FIG. 2 schematically illustrates the direction of circulation of the heat transfer fluid within the thermal control device of FIG. 1;

FIG. 3 is a view from above of a thermal regulation device for modules of a battery according to a second embodiment of the invention;

Figure 4 is a detailed view of the connection between two stamped plates of a thermal control device according to the invention. 5. Detailed Description of Embodiments

The identical elements in the different figures bear the same references. Figure 1 is a top view of modules of a large battery of a hybrid or electric vehicle and a thermal control device of these modules according to a first embodiment of the invention.

The thermal control device 1 comprises a base plate 10 on which a plurality of stamped plates 11, in this case three in this example, are secured.

The base plate 10, visible in part in FIG. 4, is a laser-cut flat sheet, for example, whose shape and dimensions correspond to those of the battery to be thermally regulated.

In this example, the base plate 10 is rectangular and is in direct or indirect thermal contact with several electrical energy storage elements, or modules, referenced 3.

On this base plate 10 are thus joined three stamped plates 11 juxtaposed.

Each stamped plate 11 forms with the base plate 10 a heat exchange plate, the heat exchange plates being intended to thermally regulate the modules 3.

In this case, nine modules 3 are arranged vis-à-vis each stamped plate 11 in Figure 1.

As illustrated in FIG. 2, each of the three stamped plates 11 delimits, with the base plate 10, a conduit 12 for circulating the coolant.

The circulation of the heat transfer fluid is only illustrated for the stamped plate 11 located on the left, the closest to the inlet E and outlet S of heat transfer fluid in the thermal control device 1.

Each duct 12 comprises two channels 121, 122 of spiral shape nested one inside the other, the channels 121, 122 being fluidly connected to one another at the center C of the double spiral.

Moreover, the thermal control device 1 comprises a single input connected to an input connector E and a single output connected to a heat transfer fluid outlet connector S, the single input and the single output being connected to each of the three conduits 12 for circulating the coolant. In other words, the heat transfer fluid inlets of the plurality of heat exchange plates are connected to a common heat transfer fluid inlet or inlet, and the heat transfer fluid outlets of the plurality of heat exchange plates are connected to an evacuation or outlet of common heat transfer fluid.

In the illustrated example, the inlet and outlet connectors S and S of the heat transfer fluid are arranged on the same side edge of the thermal control device 1.

Thus, in summary, the thermal control device 1 comprises a single circuit for circulating the coolant consisting of three separate ducts 12, each duct 12 comprising two spirally-shaped channels 121, 122 interlocked with one another, the channels 121, 122 being fluidly connected to each other at the center C of the double spiral.

The base plate 10 is preferably made of aluminum so as to allow the brazing of the stamped plates 11 on the latter.

The stamped plates 11, preferably of aluminum and "cladées", are thus intended to be joined by brazing on the base plate 10.

They are stamped so as to form internal walls, to define conduits 12 for circulating a coolant, or cooling ducts, when they are mounted on the base plate 10.

The heat transfer fluid circulation duct of each heat exchange plate, consisting of a portion of the base plate 10 and a stamped plate 11, comprises two spirally-shaped channels 121, 122 interlocked with one another in the other, the channels 121, 122 being fluidly connected to each other at the center C of the double spiral.

The channels 121, 122 of spiral shape are nested one inside the other in order to allow a homogeneous distribution of the temperature over the entire surface of the heat exchange plate and thus improves the heat exchange with the battery on the whole. of the surface of the latter.

Note that the spiral of the first channel 121 approaches more and more central point C in the direction of fluid flow, while it rotates around. From this central point C, the spiral of the second channel 122 moves further and further away from the central point C, as it rotates around. Such a design of the heat exchange plate also allows an improved heat exchange between the incoming fluid and the fluid leaving the heat exchange plate.

The "cold" incoming fluid is understood as the fluid flowing in the first channel 121 from the inlet opening to the center C of the double spiral of the heat exchange plate (in phantom in FIG. 2) , while the "hot" outgoing fluid is understood as the fluid flowing in the second channel 122, in fluid communication with the first channel 121, from the center C of the double spiral towards the outlet of the heat exchange plate ( in dashed lines in Figure 2).

In addition, with a spiral shape of the channels, equivalent heat exchange plate size, the heat exchange surface between the battery and the coolant is increased, thereby increasing the efficiency of the plate of heat exchange.

The spiral shape also allows a good definition of the walls of the channels 121, 122 and thus allows a good distribution of the mass of the battery on the heat exchange plate which is an advantage to have a good coefficient of heat exchange between these two elements.

The ducts 12 here each have a rectangular double spiral shape, which optimizes the surface of the heat exchange plate and to provide a larger exchange surface possible.

The connections between the stamped plates 11 and the base plate 10 are sealed, as well as the connection of the stamped plates 11 between them.

The stamped plates 11 juxtaposed form a first half-shell and the base plate 10 a second half-shell, the assembled half-shells forming the thermal control device 1.

This makes it possible to obtain a thermal regulation device 1 which can have a complex shape and relatively large dimensions.

Indeed, the implementation of stamped plates 11, on a single flat base plate 10, allows a great modularity of the thermal control device 1 so that the latter can be easily adapted to multiple configurations, more or less complex, a battery. Thus, for this embodiment, only one die for a stamping press is needed to manufacture the thermal regulator 1.

It is of course understood that other types of stamped plates, having different shapes and / or fluid circulation circuits, can be implemented according to the configuration of the battery on board the motor vehicle.

In any case, the invention makes it possible to free itself from the constraints relating to the size of the presses that produce the large stamped plates since the device of the invention no longer implements a single large stamped plate but a plurality of stamped plates whose dimensions are reduced and substantially identical to those of a module or group of modules.

The invention thus makes it possible to reduce the manufacturing costs of the thermal regulation devices of the modules, or elements for storing electrical energy.

It also makes it possible to provide a modular thermal regulation device, easily adaptable to all shapes and sizes of battery.

FIG. 3 is a top view of a module thermal regulation device of a battery according to a second embodiment of the invention.

On the base plate 10 are secured two stamped plates 11 juxtaposed, the stamped plates 11 being intended to come into thermal contact with several electrical energy storage elements, or modules, not shown, so as to thermally regulate them.

In the embodiments illustrated in Figures 1 to 3, there is for each heat exchange plate three zones ZI, Z2, Z3 separate and spaced counter-current flow of the fluid.

Each of these zones ZI, Z2, Z3 comprises three portions of the channels 121, 122 arranged under each module 3 (FIG. 1), thus making it possible to have two portions of channels with a circulation of the coolant in a first direction and a portion of channel with traffic in the opposite or second direction. Thus, in FIG. 3, the zones ZI and Z3 each have alternately a circulation of the coolant in a first direction, a second direction and the first direction, and the zone Z2 alternately has a circulation of the coolant in the second direction, the first sense and second sense.

The cooling duct 12 consisting of the two channels 121, 122 comprises at least once a circulation of the heat transfer fluid against the current (first direction / second direction) under a module.

However, it is possible to provide three counter-currents (FIGS. 2 or 3) or more (four counter currents, for example).

In the examples presented, the input connector E and the output connector S of the cooling duct 12 are on opposite sides of the thermal control device 1, as are the supply and exhaust ducts 123 and 124 (FIG. 3).

The width and the height of the cooling duct 12 (and therefore of the channels 121, 122) are determined in order to optimize the pressure drop of the circuit, according to the flow rates and temperatures of heat transfer fluid imposed.

The length of the cooling duct 12, and therefore the number of counter currents, are related to this pressure drop constraint.

Likewise, the width and the height of the supply duct 123 are determined in order to optimize the pressure drop of the circuit, according to the flow rates and temperatures of heat transfer fluid imposed.

For example, the feed channel 123 may have a width of 5 mm to 60 mm, and a height of 1 mm to 10 mm.

The balancing of the heat transfer fluid flows in the cooling ducts 12 in at least a part of the stamped plates 11 can be implemented by means of local restrictions, in order to force the coolant to go to the last pressed plate 11 relative to the input E of the circuit. These restrictions are positioned:

either at the inlet of the cooling duct 12 or at the inlet and the outlet of the cooling duct 12.

In FIG. 2, four restrictions 125 obtained by local stamping of the stamped plates 11 are shown schematically and are located near the inlet and the outlet of the conduits 12 of the two heat exchange plates closest to the input connectors E and output S.

Depending on the levels of pressure losses to be compensated in the stamped plates 11, it is also possible to envisage a balancing by acting on the heat transfer fluid passage sections in the cooling ducts 12, in order to constrain the heat transfer fluid to go to the last pressed plate 11 with respect to the input of the circuit of the thermal control device 1.

As indicated above, the stamped plates 11 of the thermal regulation device 1, whatever their types, are brazed on the base plate 10.

In order to guarantee the sealing of the coolant circulation circuit in the thermal regulating device 1 after soldering, the stamped plates 11 adjacent may overlap partially.

Figure 4, which is a detail view of Figure 3, illustrates such overlap between two stamped plates 11 adjacent.

This overlapping one of the other stamped plates 11 ensures a joint plane suitable for brazing and ensure, once the plates bonded by soldering, the sealing of the coolant circulation circuit within the device Thermal regulation 1.

This technique makes it possible to dispense with the implementation of additional connecting ducts and seals between the stamped plates, which, in known manner, increase the risk of leakage of the coolant.

This technique according to which the stamped plates 11 are brazed together and on the base plate 10 makes it possible to eliminate, or at least limit, the risk of leakage of the coolant out of the thermal regulation device 1.

These embodiments are given as simple illustrative and non-limiting examples.

It is easily understood that the number of stamped plates and their shape can vary without departing from the general principle of the invention.

The base plate 10 is obtained by a single cutting operation. The base plate 10 has a thickness adapted to withstand the mechanical stresses experienced during its brazing with the stamped plates 11 and during operation of the thermal control device 1.

In particular, the base plate 10 must have a thickness to maintain the flatness of the surfaces of the base plate 10 under the pressure of the coolant flowing in the thermal control device 1 during its operation.

Preferably, it is the base plate 10 which is in direct or indirect contact with the modules so as to reduce the flatness constraints of the stamped plates.

Indeed, it is simpler and less expensive to manufacture a flat base plate with an optimal flatness than plates stamped with an equivalent flatness.

In order to facilitate brazing operations, the base plate 10 is unclad while one face of the stamped plates is clad.

In a variant, it is the base plate 10 which is clad while the stamped plates 11 are not. In this case, the joining of the stamped plates 11 to each other and to the base plate 10 is achieved by a contribution of external material, by means of a clade strip, for example.

In another variant, none of the plates are clad. The joining is then performed by a bonding process.

The bonding process is not limited to the type of glue (epoxy, silicone, polyurethane, mono / bi-components), nor to a curing process (called "curing" in English) at room temperature or at a predetermined temperature.

The input connectors E and S of the heat transfer fluid in the thermal control device 1 are preferably uncladed in order to guarantee an optimal surface condition at the connector.

In a variant, these connectors are clad and a resumption in machining can be performed to ensure an optimal surface condition.

The location of the input connectors E and S of the heat transfer fluid in the thermal control device 1 is not limited to the examples described above. The connectors for the inlet and the outlet of the heat transfer fluid can, without limitation, be:

in the joint plane between the base plate and the stamped plates;

perpendicular to the stamped plates, the openings being formed in one or two stamped plates;

perpendicular to the base plate, the openings being formed therein;

at any angle to the base plate or to the stamped plate or plates, the openings being formed in one or the other of the plates.

The thermal control device according to the invention makes it possible to cool and, where appropriate, to heat the modules.

In a particular embodiment, the thermal control device 1 is composed of stamped plates having different cooling circuits (length, hydraulic section, number of counter currents under the modules).

By way of example, the zones Z1, Z2, Z3 distinct of countercurrent flow of fluid can comprise respectively three, five and three portions of channels.

In another particular embodiment, the thermal regulation device 1 is composed of stamped plates having different feed circuits, in particular in terms of hydraulic section, thus making it possible to reduce the size of the thermal regulation device 1 in zones of "casing" where the available space is less.

In another particular embodiment, the inlet connector E and the heat transfer fluid outlet connector S of the thermal control device 1 are on opposite sides (right / left).

This has the advantage of facilitating the balancing of the fluid flow rates in the various stamped plates, provided that the cooling ducts are identical or close in terms of pressure losses.

In another particular embodiment, the input connector E and the output connector S of the cooling circuit are on the same side of one of the stamped plates. This implies that the inlet supply duct is on one of the faces of the flat plate, and that the outlet discharge duct is on the opposite face (or vice versa).

In another particular embodiment, the channels of the ducts may be split in two in the longitudinal direction by means of an internal wall (the coolant flowing in the same direction on either side of the inner wall ) so as to optimize the mechanical strength of the thermal control device 1.

Furthermore, the base plate may have recesses for the passage of screws, reinforcements or lightening (to optimize its mass).

Claims

1. Device for thermal regulation (1), especially cooling, of at least one electrical energy storage element (3),

characterized in that it comprises a base plate (10) on which are secured at least two stamped plates (11) juxtaposed, said base plate (10) or said stamped plates (11) being intended to come into thermal contact with said at least one electrical energy storage element (3),

and in that each of said at least two stamped plates (11) delimits, with said base plate (10), a conduit (12) for circulating the coolant comprising two channels (121, 122) of spiral shape interleaved with one another. in the other, said channels (121, 122) being fluidly connected to each other at the center of the double spiral, said thermal regulating device (1) comprising a single input (E) and a single output (S ) heat transfer fluid connected to each of the conduits (12) for circulating the heat transfer fluid.

2. Thermal control device (1) according to claim 1, characterized in that each duct (12) has a rectangular shape of double spiral.

3. thermal control device (1) according to claim 1 or 2, characterized in that each conduit (12) has at least three zones (ZI, Z2, Z3) separate and spaced circulating heat transfer fluid against the current, intended to be placed vis-à-vis the electrical energy storage elements to be thermally regulated.

4. Thermal control device (1) according to claim 3, characterized in that each of said at least three zones (ZI, Z2, Z3) comprises three portions of the two channels (121, 122), two portions for circulation of the fluid. coolant in a first direction and a portion for a circulation of the heat transfer fluid in the opposite direction, against the current.

5. Thermal control device (1) according to claim 3 or 4, characterized in that the width of said at least three zones (ZI, Z2, 13) is substantially equal to the width of the electrical energy storage elements to be regulated. thermally.

6. Thermal control device (1) according to one of claims 1 to 5, characterized in that said at least two stamped plates (11) overlap partially.

7. Thermal control device (1) according to one of claims 1 to 6, characterized in that at least a portion of the ducts (12) comprises at least one restriction (125) passage of the heat transfer fluid for balancing the flow rates of heat transfer fluid in the conduits (12).

8. Thermal control device (1) according to one of claims 1 to 7, characterized in that one of said stamped plates (11) is connected firstly to an input connector (E) for feeding heat transfer fluid of said thermal control device (1), and secondly an outlet connector (S) for discharging the heat transfer fluid out of the thermal control device (1)

9. Thermal control device (1) according to claim 8, characterized in that said base plate (10), said at least two stamped plates (11) and said inlet and outlet connectors are joined by brazing.

10. Thermal control device (1) according to one of claims 1 to 9, characterized in that the surfaces of the base plate (10) are planar.