CN216432588U

CN216432588U - Thermal conditioning device

Info

Publication number: CN216432588U
Application number: CN201990001135.6U
Authority: CN
Inventors: A.贝伦凡特; J.韦伦; F.布森; F.贾拉尔
Original assignee: Valeo Systemes Thermiques SAS
Current assignee: Valeo Systemes Thermiques SAS
Priority date: 2018-09-13
Filing date: 2019-09-04
Publication date: 2022-05-03
Anticipated expiration: 2029-09-04
Also published as: EP3850290A1; FR3086048A1; WO2020053506A1; FR3086048B1

Abstract

The utility model relates to a thermal conditioning device (10), in particular for cooling, for an electrical component capable of releasing heat during operation, in particular for an electrical energy storage module, the system comprising: -an upper plate (11), -a lower plate (12) assembled with the upper plate to form together a plurality of circulation channels (13) for a heat transfer fluid, in which device the plates define collection chambers (40) arranged to feed the substitution fluid or to discharge the fluid circulating in the channels, each collection chamber being dedicated to only one of the groups of channels (13).

Description

Thermal conditioning device

Technical Field

The present invention relates to a thermal conditioning device, in particular for cooling, in particular for electrical components capable of releasing heat during operation, in particular to a system for cooling at least one battery or battery unit of a motor vehicle.

Background

The vehicle battery, in particular for electric or hybrid vehicles, should be kept at the desired temperature as far as possible, which is why so-called vehicle battery cooling devices are used. These cooling means may comprise a cooling plate through which a coolant is circulated. The cooling plate is mounted on the outer side of the battery with as little clearance as possible in order to dissipate heat or heat the battery.

Cooling devices are known in which the cooling plate consists of two plate parts, which are usually fastened directly to each other. Here, the first plate part is preferably flat and the second plate part is preferably a stamped or deformed sheet metal part with a curved depression. The depression is closed by a flat plate portion fixed to the stamped plate portion, thereby forming a refrigerant conduit.

Patent EP 2828922B 1 describes such a device.

The present invention aims to improve this type of device.

SUMMERY OF THE UTILITY MODEL

One subject of the utility model is therefore a thermal conditioning device, in particular for cooling, for an electrical component capable of releasing heat during operation, in particular for an electrical energy storage module, the system comprising:

-an upper plate, which is provided with a plurality of holes,

a lower plate assembled with the upper plate to jointly form a plurality of flow-through channels for a heat transfer fluid, in particular a refrigerant fluid, in particular a fluid selected from the group consisting of R134a, R1234yf or R744,

the channels are grouped into channel groups, the channels of a same group being arranged to allow refrigerant fluid to circulate in a same direction,

in this device, the plate defines collection chambers arranged to supply fluid to said chambers or to discharge fluid circulating in the channels, each collection chamber being dedicated to only one of the groups of channels.

In other words, the collecting chambers, which are arranged in particular side by side, are separated from one another such that they are in fluid communication with one another only via the channel groups. In other words, the collection chambers are not common to both channel groups or to multiple channel groups. Each channel group has its own dedicated collection chamber.

These collection chambers are either inlet collection chambers for the supply channels or outlet collection chambers for the discharge of fluid from the channels.

Thanks to the utility model, it is possible to avoid a collecting chamber common to several channel groups, i.e. a common chamber, which would have a large cross section that needs to be mechanically reinforced. The utility model makes it possible to have collecting chambers of smaller dimensions, which are therefore mechanically more robust.

According to one aspect of the utility model, at least one of the plates, in particular the lower plate, has a punching area arranged to form one of the collection chambers. In particular, each collection chamber has a stamped area on the lower plate that forms one face of the chamber.

According to one aspect of the utility model, the collection chamber has a shape diverging from the fluid inlet or outlet aperture towards the set of channels.

According to one aspect of the utility model, the fluid inlet or outlet opening is arranged to receive a pipe for fluid connection.

According to one aspect of the utility model, the lower plate and the upper plate form a cylindrical passage defining an inlet or outlet aperture.

According to one aspect of the utility model, each passage is formed by a protrusion on the plate, in particular by stamping.

According to one aspect of the utility model, each collection chamber is in fluid communication with a fluid conduit.

According to one aspect of the utility model, the inlet and outlet openings are located outside the area of heat exchange with the component to be cooled.

According to one aspect of the utility model, the conduit is fixed, in particular brazed, in the passage defining the inlet or outlet hole.

According to one aspect of the utility model, the device comprises a plurality of ducts, in particular four ducts, in particular two fluid inlet ducts and two fluid outlet ducts, which are connected to the plate at the same right edge of the plate.

According to one aspect of the utility model, the tubes are fluidly connected to a connection block external to the plate.

Thus, whatever circulation is selected for the heat exchanger in order to meet the temperature uniformity criterion, each refrigerant channel group leads to a collection chamber of small size and better mechanical strength.

Thus, the present invention allows for the assembly of two panels to be standardized and the circuit constraints (circuitizing constraints) to be transferred to the piping that is generally specific to each vehicle application, if desired.

According to one aspect of the utility model, the channels are grouped in channel groups, the channels of one group extending substantially parallel to each other with a predetermined spacing between adjacent channels (referred to as the intra-group spacing), the intra-group spacing being preferably strictly less than the spacing between two adjacent channel groups (referred to as the inter-group spacing).

This arrangement of channels may distribute pressure more efficiently and facilitate manufacture of the device and/or improve mechanical strength.

According to one aspect of the utility model, the channels of the groups are all parallel to each other, at least locally, in particular over their entire length, i.e. all the channels formed by the plates are parallel to each other.

According to one aspect of the utility model, the channels all have the same cross-section.

According to one aspect of the utility model, the channel is rectilinear. The cooling device can thus be produced more simply.

According to one aspect of the utility model, the channel extends substantially the entire length of the plate.

According to one aspect of the utility model, the sets of channels are arranged side by side and have the same length.

According to one aspect of the utility model, the intra-group spacing between different channels in the same channel group is constant.

According to one aspect of the utility model, the intra-group spacing between different channels of the same channel group is variable.

According to one aspect of the utility model, the interclass spacing between different channel groups is constant.

According to one aspect of the utility model, the inter-group spacing between different channel groups is variable.

According to one aspect of the utility model, the cooling device comprises a turn-around chamber arranged to direct fluid leaving one of the channel groups to one of the other channel groups.

According to one aspect of the utility model, all the channels of the set open into the diverting chamber.

According to one aspect of the utility model, the turn chamber is formed by an upper plate and a lower plate.

According to an aspect of the utility model, one of the upper plate and the lower plate, in particular the lower plate, comprises a punching area arranged to participate in the formation of the turn chamber.

According to one aspect of the utility model, the punching area is closed with the other of the plates to form a turn-around chamber.

According to one aspect of the utility model, the turn-around chamber extends on one side of the plate.

According to one aspect of the utility model, the device has three or four or more channel groups.

In one variant, the device has two channel groups.

According to one aspect of the utility model, the number of sets of channels dedicated to the circulation of refrigerant fluid in one direction is equal to the number of sets of channels dedicated to the circulation of fluid in the opposite direction.

According to one aspect of the utility model, two channel groups with the same direction of fluid flow lead to the diverting chamber. The two channel groups are neighbors.

According to one aspect of the utility model, the turn chamber is fluidly connected to two further channel sets arranged to receive refrigerant fluid exiting the turn chamber. The two channel groups are neighbors.

According to one aspect of the utility model, four or more channel groups are therefore connected to a common diverting chamber.

According to one aspect of the utility model, in one example, the two sets of inlet channels on the diverting chamber are arranged on one branch of the diverting chamber and the two sets of outlet channels of the diverting chamber are arranged on the other branch of the diverting chamber.

According to one aspect of the utility model, the branches of the diverting chamber are substantially rectilinear and perpendicular to the channel.

According to one aspect of the utility model, the elbow of the turn-around chamber is arranged to connect the two branches of the turn-around chamber.

The elbow may have the shape of a circular arc, for example with a 180 degree opening.

According to one aspect of the utility model, the cooling device comprises an inlet area for the refrigerant fluid of the channel, which inlet area is formed between the two plates.

According to one aspect of the utility model, the fluid inlet region is arranged to supply all fluid communication channels leading to the diverting chamber, i.e. channels in which fluid flows towards the diverting chamber.

According to one aspect of the utility model, the inlet region is common to at least two sets of channels.

According to one aspect of the utility model, the cooling device comprises an outlet area for the refrigerant fluid of the channel, which outlet area is formed between the two plates.

According to an aspect of the utility model, the fluid outlet area is arranged to direct fluid exiting all fluid communication channels originating from the turn chamber.

According to one aspect of the utility model, the outlet area is common to at least two channel groups.

According to one aspect of the utility model, the inlet and outlet regions are adjacent the respective inlet and outlet apertures.

According to one aspect of the utility model, the inlet and outlet apertures are connected to the pipe connector block.

According to one aspect of the utility model, the upper plate is flat.

According to one aspect of the utility model, the lower plate has a region with a rounded cross-section, in particular a punched region, to form a channel with the upper plate.

As can be observed, the turn-around chamber allows the formation of a circuit within the plate itself, so as to satisfy the temperature uniformity criteria within the device itself in a cost-optimized method.

Thanks to these plates, the utility model also makes it possible to have a reduced volume in the height direction and to require only a reduced number of components.

The thermal conditioning device, in particular located below the element to be cooled (for example a battery pack), is held below the element to be cooled by a mechanical system (for example by screwing) or by a chemical system (for example by gluing).

According to one aspect of the utility model, the upper plate is arranged in the region in direct contact with the element to be cooled, in order to maximize the contact area with the element to be cooled.

According to one aspect of the utility model, the channel is sized in response to a compromise between:

mechanical strength to withstand the mechanical stresses associated with the use of the refrigerant, in particular a tightness of 15bar, a burst pressure of 54bar and a limited deformation at the pressure of use,

thermal performance, limiting the refrigerant pressure drop along the circuit by the presence of a maximum passage cross section, also promoting the heat exchange with the element to be cooled by the presence of a maximum wetted surface area.

This compromise makes it possible to define the maximum cross section of the channels that is not exceeded and the height and number of channels, and this can be achieved for every material thickness used to produce the lower plate.

This lower plate can be obtained by stamping.

Another subject of the utility model is a system comprising an electrical component capable of releasing heat in the presence of a process, in particular for an electrical energy storage module, and the above-mentioned cooling device arranged to cool the component, the component or the battery being in thermal contact with the upper plate of the cooling device.

Another subject of the utility model is a cooling system as described above, comprising a battery unit.

Drawings

The utility model will be better understood and other details, characteristics and advantages thereof will become more apparent from a reading of the following description, given by way of non-limiting example, with reference to the accompanying drawings. In the drawings:

figures 1 and 2 show schematically and partially an apparatus according to an example of the utility model according to different views;

fig. 3 and 4 show schematically and partly an arrangement according to another example of the utility model according to different views.

Detailed Description

In fig. 1 and 2, a system 1 is shown, the system 1 comprising: a group of battery cells 2 to be cooled, for example, in two or more rows; and a cooling device 10, the cooling device 10 being arranged to cool the battery unit 2, the battery unit 2 being in thermal contact with an upper plate of the cooling device 10, as described below.

The thermal conditioning device 10 includes:

-an upper plate 11, on which the plate is mounted,

a lower plate 12 assembled with the upper plate 11 to jointly form a plurality of flow-through channels 13 for a heat transfer fluid, in particular a refrigerant fluid, in particular a fluid chosen from R134a, R1234yf or R744.

The channels 13 are grouped in channel groups 14, the channels of one group extending substantially parallel to each other with a predetermined spacing between adjacent channels, referred to as the intra-group spacing 15, which is strictly less than the spacing between two adjacent channel groups, referred to as the inter-group spacing 16.

The cross-section of each channel 13 is 1mm²To 9mm²Within the range.

The channels 13 all have the same cross section and are rectilinear.

The channel 13 extends substantially over the entire length of the plate.

The channel groups 14 are arranged side by side and have the same length.

In the example considered, the intraclass spacing 15 between different channels 13 of the same channel group is constant.

In the example considered, the interclass spacing 16 between different channel groups is constant.

The cooling arrangement comprises a turn-around chamber 20, which turn-around chamber 20 is arranged to direct fluid leaving one of the channel groups 14 to one of the other channel groups.

All channels 13 of the set open into the diverting chamber.

The turn chamber 20 is formed of an upper plate 11 and a lower plate 12, for example, made of aluminum.

The lower plate 12 comprises a punching area 21, which punching area 21 is arranged to participate in the formation of the turn chamber 20.

The punching area 21 is closed with another flat plate of the plates 11 to form a turn chamber 20.

The turn-around chamber 20 extends on one side 23 of the plate.

The device has four channel groups 14.

The number of sets of channels dedicated to the circulation of refrigerant fluid in one direction is equal to the number of sets of channels dedicated to the circulation of fluid in the opposite direction.

Two channel groups 14 having the same direction of fluid flow open into the diverting chamber. These two channel groups are neighbors on half of the board.

The turn chamber 20 is fluidly connected to two other channel sets 14 arranged to receive refrigerant fluid exiting the turn chamber. The two channel groups are neighbors on the other half of the board.

Thus, the four channel groups are connected to the common turnaround chamber 20.

The two inlet channel groups 14 on the diverting chamber 20 are arranged on a branch 25 of the diverting chamber and the two outlet channel groups of the diverting chamber are arranged on another branch 26 of the diverting chamber.

The direction of flow of the fluid is indicated by the arrows in fig. 2.

These

branches

25 and 26 of the diverting chamber 20 are substantially rectilinear and perpendicular to the passage.

The elbow 28 is arranged to connect the two

branches

25 and 26 of the turn-around chamber.

The cooling device comprises an inlet area 30 for the refrigerant fluid of the channel, which is formed between the two

plates

11, 12.

The fluid inlet region 30 is arranged to supply all fluid communication channels 30 leading to the turning chamber 20, i.e. channels in which fluid flows towards the turning chamber.

The inlet region 30 is common to the set of channels 14.

The cooling device comprises an outlet area 31 for the refrigerant fluid of the channel, which is formed between the two

plates

11, 12.

The fluid outlet area 31 is arranged to direct fluid leaving all fluid flow channels 13 originating from the turn chamber.

The outlet area 31 is common to both channel groups.

The inlet and

outlet regions

30, 31 are adjacent the inlet and

outlet apertures

32, 33 respectively.

The inlet and outlet holes 32, 33 are connected to the pipe connector block 6.

The lower plate 2 comprises a region 37, in particular a punched region, with a rounded cross-section to form the channel 13 with the upper plate.

The inlet region 30 and the outlet region 31 comprise the stamped regions of the lower plate 12.

Preferably, the heat transfer fluid may be selected from the group of fluids labeled R134a, R1234yf, or R744.

The heat transfer fluid used is instead glycol-water, with no limitation on the glycol content (0% to 100%).

The battery unit includes a plurality of lithium ion (Li-ion) batteries, for example, used in hybrid vehicles. In another embodiment, the plurality of battery cells are lithium ion batteries used in battery powered electric vehicles.

The turn-around chamber 20 and/or the inlet region 30 and/or the outlet region 31 comprise stiffening elements, where appropriate, to reinforce the mechanical strength in these regions, which may have a larger cross-section.

These reinforcing elements are, for example, ribs.

Another embodiment of the present invention has been described with reference to fig. 3 and 4.

In this embodiment, the connection to the block 6 via the

holes

32 and 33 is modified.

In the present embodiment, the

plates

11 and 12 define collection chambers 40, the collection chambers 40 being arranged to supply fluid to the channels 13 or to discharge fluid circulating in the channels 13, each collection chamber 40 being dedicated to only one of the channel groups.

These collection chambers 40 are either inlet collection chambers for the supply channels or outlet collection chambers for the discharge of fluid from the channels 13.

The lower plate 12 has stamped areas 41, each stamped area 41 being arranged to form one of the collection chambers 40.

In particular, each collection chamber 40 has a stamped area 41 on the lower plate that forms one face 42 of the chamber.

The collection chamber 40 has a shape that diverges from the fluid inlet or outlet aperture 44 toward the channel set 13.

Each fluid inlet or outlet hole 44 is arranged to receive a pipe 45 for fluid connection.

The lower plate 12 and the upper plate 11 form a preferably cylindrical passage 47 that defines the inlet or outlet aperture 44.

Each passage 47 is formed by a projection 48 on the plate, in particular by stamping.

Each collection chamber 40 is in fluid communication with a fluid conduit 45.

The inlet and outlet openings 44 are located outside the area where heat exchange with the component 2 to be cooled takes place.

The conduit 45 is fixed, in particular brazed, in a passage 47 defining an inlet or outlet aperture.

The device 1 comprises a plurality of ducts 45, in particular four ducts, in particular two fluid inlet ducts and two fluid outlet ducts, which are connected to the plate at the same straight edge 49 of the plate.

These pipes 45 are fluidly connected to the connection blocks 6 outside the plates.

Claims

1. A thermal conditioning device for an electrical component capable of releasing heat during operation, the thermal conditioning device comprising:

an upper plate (11) is provided,

a lower plate (12) assembled with said upper plate to jointly form a plurality of flow-through channels for a heat transfer fluid,

the channels (13) being grouped into channel groups, the channels of a same group being arranged to allow refrigerant fluid to circulate in a same direction,

in the thermal conditioning device, the plate defines collection chambers (40) arranged to supply fluid to the channels or to discharge fluid circulating in the channels, each collection chamber being dedicated to only one of the groups of channels.

2. A heat conditioning device according to claim 1, characterized in that at least one of the plates has a stamped area (41) arranged to form one of the collecting chambers.

3. A thermal conditioning device according to claim 1 or 2, characterized in that said collection chamber (40) has a shape diverging from a fluid inlet or outlet aperture towards said set of channels.

4. A heat conditioning device according to claim 3, characterized in that the fluid inlet or outlet aperture (44) is arranged to receive a conduit (45) for fluid connection.

5. A thermal conditioning device according to claim 4, wherein the lower plate and the upper plate form a cylindrical passage (47) defining the inlet or outlet aperture.

6. A heat conditioning device according to claim 5, characterized in that each passage is formed by a protrusion (48) on the plate.

7. A thermal conditioning device according to claim 1 or 2, wherein each collection chamber is in fluid communication with a fluid conduit.

8. A thermal conditioning device according to claim 5, characterized in that said duct (45) is fixed in said passage (47) defining said inlet or outlet aperture.

9. A heat conditioning device according to claim 3, characterized in that it comprises a plurality of ducts connected to the plate at the same straight edge (49) of the plate.

10. A thermal conditioning device according to claim 3, characterized in that the pipes are fluidly connected to connection blocks outside the plates.

11. The thermal conditioning device of claim 1, wherein the thermal conditioning device is configured for cooling.

12. The thermal conditioning device of claim 1, wherein the thermal conditioning device is for an electrical energy storage module.

13. The thermal conditioning device of claim 1, wherein the heat transfer fluid is a fluid selected from the group consisting of: r134a, R1234yf or R744.

14. A heat conditioning device according to claim 2, characterized in that the lower plate has a stamped area (41) arranged to form one of the collecting chambers.

15. The thermal conditioning device of claim 6, wherein the protrusion is formed by stamping.

16. A thermal conditioning device according to claim 8, characterized in that the conduit (45) is welded in the passage (47) defining the inlet or outlet aperture.

17. The thermal conditioning device of claim 9, wherein the thermal conditioning device comprises four conduits, the four conduits comprising two fluid inlet conduits and two fluid outlet conduits.