Thermal control device, in particular for cooling

Abstract

The invention relates to a thermal control device (1), in particular for cooling, for an electrical component (100) capable of releasing heat, the device comprising an upper plate (2), an intermediate plate (3) and a lower plate (4), the intermediate plate (3) being assembled by being interposed between the upper plate (2) and the lower plate (4), in order to together form a plurality of circulation channels (5) for a heat-transfer fluid, the channels (5) extending between a fluid inlet zone and a fluid outlet zone, in which thermal control device the intermediate plate (3) comprises a plurality of bars (10) which each have a perimeter at least partially delimiting at least one of the channels (5), and two bars (10) on either side of the channel (5) are connected together by at least one bridge of material (20) which extends locally across the channel (5) between these bars (10).

Description

[0001] DESCRIPTION

[0002] Title: Thermal regulation device, particularly for cooling

[0003] [1] The present invention relates to a thermal regulation device, in particular a cooling device, in particular for an electrical component capable of releasing heat during its operation, in particular a cooling device for at least one battery or battery cells of a vehicle, for example a motor vehicle.

[0004] [2] The vehicle can be of land, sea or air type.

[0005] [3] In the field of battery cooling systems, some systems use a direct loop with CO2 (R744) as the refrigerant. CO2 (R744) used as a refrigerant operates at very high pressures, often exceeding 100 bar or 200 bar, or even 250 bar. The system must be able to withstand a burst pressure exceeding 200 bar or 250 bar, or even 300 bar.

[0006] [4] The invention is specifically intended to meet this need.

[0007] [5] The invention thus proposes a thermal regulation device, in particular a cooling device, for an electrical component capable of releasing heat during its operation, this component being in particular a battery, this device comprising an upper plate, an intermediate plate and a lower plate, the intermediate plate being assembled by being interposed between the upper plate and the lower plate, to together form a plurality of circulation channels for a heat transfer fluid, in particular a refrigerant fluid in particular of type R744, the channels extending between a fluid inlet zone and a fluid outlet zone, thermal regulation device in which the intermediate plate comprises a plurality of bars which each have a perimeter delimiting at least partially at least one of the channels,and two bars on either side of the channel being connected to each other by at least one bridge of material which extends in a localized manner across the channel between these bars,

[0008] [6] The different plates are brazed together.

[0009] [7] In the present invention, the fact that the material bridge extends in a localized manner across the channel means that the material bridge passes only through a portion of the channel and does not extend over the entire channel delimited by this bar. In other words, the material bridge is relatively small compared to the dimensions of the channel. For example, the channel has a length measured in the direction of flow of the heat transfer fluid, and the material bridge has a dimension measured along the direction of flow of the heat transfer fluid that is smaller than the length of the channel.

[0010] [8] According to one aspect of the invention, the material bridge has a dimension measured along the direction of flow of the heat transfer fluid which is smaller than the length of the bar, the length being measured along the direction of flow of the heat transfer fluid.

[0011] [9] According to one aspect of the invention, the material bridge has a dimension measured along the direction of flow of the heat transfer fluid which is at least 5 times smaller, or at least 10 times or 20 times smaller, than the length of the bar, the length being measured along the direction of flow of the heat transfer fluid.

[0012]

[0010] According to one aspect of the invention, at least some of the bars are in contact with the rest of the intermediate plate only by the material bridge(s).

[0013]

[0011] According to one aspect of the invention, the bar has a solid cross-section. In other words, the bar is not perforated.

[0014]

[0012] The present invention makes it possible to mechanically reinforce / stiffen the plate assembly along the entire length of the channels, thanks to the bars that delimit the channels, to withstand high burst pressures that can exceed 200 bar or 250 bar, particularly when using an R744 refrigerant.

[0013] In the present invention, the channels have a relatively small cross-section and offer good mechanical strength along these channels thanks to the bars, over the entire thermal regulation device. Thus, in the invention, the mechanical reinforcement is not only applied to a part, for example the fluid inlet or outlet, of the thermal regulation device, but to the entire device.

[0015]

[0014] The bars allow for large brazing surfaces with the lower plate and the upper plate, which creates good mechanical strength.

[0016]

[0015] The thickness of the bars allows the channels to be balanced with each other.

[0017]

[0016] According to one aspect of the invention, the intermediate plate with the bars that compose it is brazed with the lower plate and the upper plate.

[0018]

[0017] The material bridges in the invention serve to hold the bars together, particularly before assembly with the two lower and upper plates, and do not play a significant role in stiffening the entire thermal regulation device. This stiffening is primarily achieved by the bars being brazed to the lower and upper plates.

[0019]

[0018] According to one aspect of the invention, the intermediate plate is inserted (sandwiched) between the lower plate and the upper plate, which are in particular flat, and the height of the channels is equal to the thickness of the intermediate plate.

[0020]

[0019] According to one aspect of the invention, the upper plate and the lower plate are flat, being devoid of embossed areas.

[0021]

[0020] According to another aspect of the invention, the lower plate is a stamped plate, and the upper plate is a flat plate. This allows for rigidification while retaining a large fluid volume.

[0022]

[0021] According to one aspect of the invention, the various plates are cut plates, in particular the intermediate plate is a cut plate to form the bars.

[0022] According to one aspect of the invention, at least the intermediate plate is a cut plate to form the bars.

[0023]

[0023] According to one aspect of the invention, the channels are configured to withstand fluid pressure constraints exceeding 130 bar

[0024]

[0024] According to one aspect of the invention, the channels extend over the major part, in particular more than 75%, of the fluid flow between the fluid inlet and the fluid outlet, or even over substantially all of the fluid flow between the fluid inlet and the fluid outlet.

[0025]

[0025] In other words, the channels are not limited to a small area of ​​the fluid path between the fluid inlet and the fluid outlet.

[0026]

[0026] According to one aspect of the invention, the channels extend in parallel with each other, at least on some of their sections.

[0027]

[0027] According to one aspect of the invention, the intermediate plate comprises a plurality of bars arranged to define channels of the thermal regulation device between them, these bars being arranged in particular in a parallel manner between them.

[0028]

[0028] According to one aspect of the invention, at least one of the bars has an elongated shape, and the bar has a length substantially equal to the length of a fluid pass in the thermal regulation device.

[0029]

[0029] According to one aspect of the invention, at least one of the bars has a serpentine shape.

[0030]

[0030] According to one aspect of the invention, the bar has in particular a length greater than half, or greater than 75%, of the length of the thermal regulation device.

[0031]

[0031] According to one aspect of the invention, in cross-section in a plane perpendicular to the direction of circulation of the heat transfer fluid, the channel or channels have a width that is smaller than the width of the bars.

[0032]

[0032] According to one aspect of the invention, the width of the channels is between 0.5 mm and 5 mm, for example 2.3 mm.

[0033] In the present invention, in cross-section, there is more solid material section than fluid passage section.

[0033]

[0034] According to one aspect of the invention, the material bridge has a dimension in the direction of fluid flow of between 1 mm and 10 mm.

[0034]

[0035] According to one aspect of the invention, when the fluid flow between the fluid inlet and the fluid outlet is of the multipass type, the bars form groups of bars, each group of bars being configured to form channels of one of the fluid passes.

[0035]

[0036] In particular, the material bridge extends into the channel and has a thickness (measured perpendicular to the plane of the plates) that represents at least 10% and at most 55% of the total height of the channel.

[0036]

[0037] The thickness of the material bridge is, for example, 0.75 mm.

[0037]

[0038] According to one aspect of the invention, the material bridge has a concavity on one face facing the channel. This helps to limit internal stresses.

[0038]

[0039] Alternatively, the material bridge has a flat face.

[0039]

[0040] According to one aspect of the invention, the material bridge is recessed from both faces of the intermediate plate. In other words, when the intermediate plate is interposed between the lower and upper plates, the material bridge does not come into contact with either the lower or upper plate. The material bridge is thus recessed from both the lower and upper plates.

[0040]

[0041] In particular, the material bridge does not serve as a brazing area since it does not come into contact with the lower or upper plate.

[0041]

[0042] The material bridge can be closer to the upper plate than to the lower plate, or vice versa.

[0042]

[0043] Alternatively, the material bridge can be equidistant from the lower plate and the upper plate.

[0043]

[0044] According to one aspect of the invention, the material bridges associated with a row of several parallel channels are arranged along a line. This line may be perpendicular to the channels in the row. Alternatively, the line may be oblique to the channels in the row.

[0044]

[0045] In yet another variation, the material bridges are arranged with an offset according to the channel lengths when moving from one channel to the next. In this case, the material bridges are, for example, arranged alternately when moving from one channel to the next. In yet another variation, within the channel row, the material bridges can be arranged randomly when moving from one channel to the next.

[0045]

[0046] According to one aspect of the invention, the bars are connected to each other by a single bridge of material between two neighboring bars, or by at least two bridges of material between two neighboring bars and arranged at a distance from each other in the direction of fluid flow.

[0046]

[0047] According to one aspect of the invention, the intermediate plate comprises a frame and the bars that define the channels are connected to the frame only by said material bridges.

[0047]

[0048] According to one aspect of the invention, the frame of the intermediate plate has a peripheral rim which defines the outer perimeter of the intermediate plate.

[0048]

[0049] According to one aspect of the invention, the bars are connected to this peripheral edge of the frame by means of material bridges.

[0049]

[0050] Thus the intermediate plate can be formed by a frame and bars which connect to this frame by a plurality of material bridges.

[0050]

[0051] According to one aspect of the invention, the frame may include a branch (in particular made by cutting) configured to participate in the formation of channels within the thermal regulation device.

[0051]

[0052] According to one aspect of the invention, this branch, which is a ramification of the peripheral rim, is notably configured to make the delimitation between different passes on the fluid path between the fluid inlet and the fluid outlet.

[0053] In other words, the channel design is formed by the frame and possibly one or more branches of this frame, as well as by the bars.

[0052]

[0054] According to one aspect of the invention, the intermediate plate is made in one piece, that is, produced as a single unit. This simplifies the manufacturing process because only one assembly is handled, rather than separate parts.

[0053]

[0055] Alternatively, the intermediate plate is formed from several pieces which are arranged side by side to form the entire intermediate plate.

[0054]

[0056] In this case, the bars of each piece are held together by bridges of material, arranged for example at the two ends of these bars.

[0055]

[0057] Manufacturing the intermediate plate in sections allows for the standardization of certain sections. Therefore, for some applications, it is possible to use both standard and specific sections.

[0056]

[0058] Material bridges are created from the material of an initial plate and material bridges are made using a punch (punching in English).

[0057]

[0059] The invention further relates to a thermal regulation device, in particular a cooling device, for an electrical component capable of releasing heat during its operation, this component being in particular a battery, this device comprising an upper plate, an intermediate plate and a lower plate, the intermediate plate being assembled by being interposed between the upper plate and the lower plate, to together form a plurality of circulation channels for a heat transfer fluid, in particular a refrigerant fluid in particular of type R744, the channels extending between a fluid inlet zone and a fluid outlet zone, thermal regulation device in which the intermediate plate comprises a plurality of bars which each have a perimeter delimiting at least partially at least one of the channels, and the channels being configured to withstand fluid pressure constraints greater than 130 bars.

[0060] The present invention relates in particular to a thermal regulation device for a battery, formed for example of cylindrical or prismatic cells.

[0058]

[0061] The invention also relates to a method for manufacturing a thermal regulation device, in particular a cooling device, for an electrical component capable of generating heat during its operation, this component being in particular a battery, this device comprising an upper plate, an intermediate plate and a lower plate, the method comprising the following steps:

[0059] - placing the intermediate plate interposed between the upper plate and the lower plate, to form together a plurality of circulation channels for a heat transfer fluid, in particular a refrigerant fluid, in particular of type R744, the channels extending between a fluid inlet zone and a fluid outlet zone, the intermediate plate comprising a plurality of bars, each having a perimeter delimiting at least partially at least one of the channels, and two bars on either side of the channel being connected to each other by at least one material bridge extending in a localized manner across the channel between these bars,

[0060] - braze together the upper plate, the intermediate plate and the lower plate.

[0061]

[0062] According to one aspect of the invention, the process includes the step of forming the intermediate plate from several pieces which are in particular arranged side by side to form the entire intermediate plate.

[0062]

[0063] The invention further relates to a system comprising an electrical component capable of releasing heat during its operation, in particular for an electrical energy storage module, and a cooling device described above, arranged to cool the component, this component, in particular battery cells, being in thermal contact with the upper plate of the cooling device.

[0063]

[0064] Other features and advantages of the invention will become clearer upon reading the following description, given by way of illustrative and non-limiting example, and the accompanying drawings, among which:

[0065] - [Figure 1] illustrates, schematically and partially, in cross-section, a thermal regulation device according to an example of an embodiment of the invention;

[0064]

[0066] - [Figure 2] illustrates, schematically and partially, the intermediate plate of the thermal regulation device of figure 1, from the front;

[0065]

[0067] - [Figure 3] illustrates, schematically and partially, in cross-section, a thermal regulation device according to another embodiment of the invention;

[0066]

[0068] - [Figure 4] illustrates, schematically and partially, from the front, a thermal regulation device according to yet another embodiment of the invention, the intermediate plate of which is made in several pieces.

[0067]

[0069] Figures 1 and 2 show a thermal regulation device 1 for cooling electrical components that may release heat during operation, in this case a battery 100.

[0068]

[0070] Device 1 comprises an upper plate 2, an intermediate plate 3 and a lower plate 4 which are brazed together.

[0069]

[0071] The intermediate plate 3 is assembled by being interposed between the upper plate 2 and the lower plate 4, to together form a plurality of circulation channels 5 for a heat transfer fluid, here a refrigerant fluid in particular of type R744.

[0070]

[0072] As can be seen in Figure 2, the channels 5 extend between a fluid inlet zone 7 and a fluid outlet zone 8. A fluid connection flange 19 can be connected to this inlet 7 and outlet 8 to provide connections.

[0071]

[0073] The intermediate plate 3 comprises a plurality of bars 10, each of which has a perimeter which helps to delimit the channel or channels 5, and two bars 10 on either side of the channel 5 being connected to each other by at least one bridge of material 20 which extends in a localized manner across the channel 5 between these bars 10.

[0072]

[0074] In the present invention, the fact that the material bridge 20 extends in a localized manner across the channel 5 means that the material bridge 20 passes only through a part of the channel 5 and does not extend over the entire channel 5. In other words, the material bridge 20 is relatively small compared to the dimensions of the channel 5.

[0073]

[0075] Each material bridge 20 has a dimension measured along the direction of flow of the heat transfer fluid which is smaller than the length of the bar 10, the length being measured along the direction of flow of the heat transfer fluid.

[0074]

[0076] For example, the material bridge 20 has a dimension measured along the direction of flow of the heat transfer fluid which is at least 5 times smaller, or at least 10 times or 20 times smaller, than the length of the bar 10, the length being measured along the direction of flow of the heat transfer fluid.

[0075]

[0077] Some of the bars 10 are in contact with the rest of the intermediate plate 3 only by the material bridge(s) 20.

[0076]

[0078] Each bar 10 has a solid cross-section. In other words, bar 10 is not openwork.

[0077]

[0079] The present invention makes it possible to mechanically reinforce / stiffen the plate assembly, all along the channels 5, thanks to the bars 10 which delimit the channels 5, to withstand high burst pressures which can be greater than 200 bars or 250 bars, in particular in the case of use of a refrigerant of type R744.

[0078]

[0080] The channels 5 are of relatively small cross-section, and offer good mechanical support along these channels 5 thanks to the bars 10, over the entire thermal regulation device.

[0079]

[0081] The 10 bars allow for large brazing surfaces with the lower plate 4 and the upper plate 2, which creates good mechanical strength.

[0080]

[0082] The thickness of the bars 10, which is measured perpendicular to the plane of the plates, allows the channels 5 to be balanced between them.

[0081]

[0083] The intermediate plate 3, with the bars 10 that compose it, is brazed with the lower plate 4 and the upper plate 2.

[0082]

[0084] The material bridges 20 in the invention serve to hold the bars 10 together, particularly before assembly with the two lower and upper plates, and do not play a significant role in stiffening the entire thermal regulation device. This stiffening is primarily achieved by the bars 10 being brazed to the lower plate 4 and upper plate 2.

[0083]

[0085] The intermediate plate 3 is inserted (sandwiched) between the lower plate 4 and the upper plate 2 which are flat and the height of the channels 5 is equal to the thickness of the intermediate plate 3.

[0084]

[0086] The upper plate 2 and the lower plate 4 are flat, being devoid of embossed areas.

[0085]

[0087] In an unillustrated variant, the lower plate 4 is a stamped plate, and the upper plate 2 is a flat plate. This provides rigidity while maintaining a large fluid volume.

[0086]

[0088] The different plates are cut plates, in particular the intermediate plate 3 is a cut plate to form the bars 10.

[0087]

[0089] The channels 5 extend over most, in particular more than 75%, of the fluid flow between the fluid inlet and the fluid outlet, or even over substantially all of the fluid flow between the fluid inlet zone 7 and the fluid outlet zone 8.

[0088]

[0090] In other words, the channels 5 are not limited to a small area of ​​the fluid path between the fluid inlet area 7 and the fluid outlet area 8.

[0089]

[0091] The 5 canals run parallel to each other along some of their sections.

[0090]

[0092] In the example described, the intermediate plate 3 has a plurality of bars 10 arranged to define between them the channels 5 of the thermal regulation device, these bars 10 being in particular arranged in parallel with each other.

[0091]

[0093] Each bar 10 has an elongated shape, and the bar 10 has a length substantially equal to the length of a fluid pass in the thermal regulation device 1.

[0092]

[0094] The bar 10 has in particular a length greater than half, or greater than 75%, of the length LD of the thermal regulation device 1.

[0095] In cross-section in a plane perpendicular (section ll) to the direction of circulation of the heat transfer fluid, as can be seen in Figure 1, the channels 5 have a width WP which is smaller than the width WB of the bars 10.

[0093]

[0096] According to one aspect of the invention, the width of the channels 5 is between 0.5 mm and 5 mm, for example 2.3 mm.

[0094]

[0097] In the present invention, in cross-section, there is more accumulation of solid material sections due to the bars 10 than accumulation of fluid passage sections due to the channels 5.

[0095]

[0098] According to one aspect of the invention, the material bridge 20 has a dimension in the direction of fluid flow of between 1 mm and 10 mm.

[0096]

[0099] The fluid circulation between the fluid inlet zone 7 and the fluid outlet zone 8 is of the multipass type, the bars 10 form groups of bars 10, each group of bars 10 being configured to form channels 5 of one of the fluid passes.

[0097]

[0100] The channels 5 pass through reversing zones 24 in such a way that at least some of the channels 5 have a substantially U-shaped form in this reversing zone 24. For example, three reversing zones 24 may be present successively between the fluid inlet zone 7 and the fluid outlet zone 8.

[0098]

[0101] As can be seen in Figure 2, the turning zones 24 are formed by serpentine bars 10u (with multiple successive U's) which are connected to neighboring bars by material bridges 20.

[0099]

[0102] The material bridge 20 extends into channel 5 and has a thickness (measured perpendicular to the plane of the plates) which represents at least 10% and at most 55% of the total height of channel 5.

[0100]

[0103] The thickness of the material bridge 20 is, for example, 0.75 mm.

[0101]

[0104] The material bridge 20 may have a concave face on one side facing the channel 5. This helps to limit internal stresses. Alternatively, the material bridge 20 may have a flat face.

[0105] In the example in Figure 1, the material bridge 20 is set back from the two faces 17 of the intermediate plate 3. In other words, when the intermediate plate 3 is interposed between the lower plate 4 and the upper plate 2, the material bridge 20 does not come into contact with the lower plate 4 or the upper plate 2. The material bridge 20 is thus set back from the lower plate 4 and the upper plate 2.

[0102]

[0106] In particular, the material bridge 20 does not serve as a brazing zone since it does not come into contact with the lower plate 4 or the upper plate 2.

[0103]

[0107] In the example in Figure 1, the material bridge 20 can be equidistant from the lower plate 4 and the upper plate 2.

[0104]

[0108] Alternatively, the material bridge 20 can be closer to the lower plate 4 than to the upper plate 2, as illustrated in Figure 3.

[0105]

[0109] The material bridges 20 associated with a row of several parallel channels 5 are arranged along a line Ll. This line Ll can be perpendicular to the channels 5 of the row, as in the example in Figure 2.

[0106]

[0110] As an alternative (not illustrated), the material bridges 20 associated with a row of several parallel channels 5 are arranged along an oblique line relative to the channels 5 of the row.

[0107]

[0111] In yet another variant (not illustrated), the material bridges 20 are arranged with an offset according to the length of the channels 5 when moving from one channel 5 to the next. In this case, the material bridges 20 are, for example, arranged alternately when moving from one channel 5 to the neighboring channel 5.

[0108]

[0112] In yet another variant, within the row of channels 5, the material bridges 20 can be arranged randomly when moving from one channel 5 to the next channel 5.

[0109]

[0113] The bars 10 are connected to each other by at least several material bridges 20 (for example, three in number) between two neighboring bars 10 arranged at a distance from each other in the direction of fluid flow.

[0110]

[0114] The intermediate plate 3 has a frame 11 and the bars 10 which define the channels 5 are connected to the frame 11 only by said material bridges 20.

[0115] The frame 11 of the intermediate plate 3 has a peripheral rim 14 which defines the outer perimeter of the intermediate plate 3.

[0111]

[0116] The bars 10 connect to this peripheral edge 14 of the frame 11 by the material bridges 20.

[0112]

[0117] The peripheral rim 14 contributes to the delimitation of the channels 5.

[0113]

[0118] Thus the intermediate plate 3 can be formed by a frame 11 and bars 10 which connect to this frame 11 by a plurality of material bridges 20.

[0114]

[0119] The frame 11 may include a branch 15 (in particular made by cutting) configured to participate in the formation of the channels 5 within the thermal regulation device 1.

[0115]

[0120] This branch 15, which is a ramification of the peripheral rim 14, is specifically configured to delimit between different passes on the fluid path between the fluid inlet and the fluid outlet.

[0116]

[0121] In other words, the design of the channels 5 are formed by the frame and possibly one or more branches 15 of this frame 11, as well as by the bars 10.

[0117]

[0122] For example, one of the branches 15 may have an overall U-shape which encloses two groups 10a and 10b of bars 10 in the center of the intermediate plate 3. Another branch 15a may be overall straight and extends along a midline of the intermediate plate 3.

[0118]

[0123] The intermediate plate 3 is made in one piece, that is, produced as a single unit. This simplifies the manufacturing process because only one assembly is handled, rather than separate parts.

[0119]

[0124] Alternatively, as illustrated in Figure 4, the intermediate plate 3 is formed of several pieces 30a, 30b, 30c which are arranged side by side to form the whole of the intermediate plate 3.

[0120]

[0125] In this case, the bars 10 of each piece are held together with respect to each other by bridges of material 20, arranged for example at the two ends of these bars 10.

[0126] In the example described, piece 30b includes linear sections of 5 channels.

[0121]

[0127] Manufacturing the intermediate plate 3 in sections allows for the standardization of certain sections, for example, section 30b with linear channel segments. Therefore, for some applications, it is possible to use both standard and specific sections.

[0122]

[0128] The material bridges 20 are derived from the material of an initial plate and the material bridges 20 are made using a punch (called "punching" in English).

Claims

Demands

1. Thermal regulation device (1), in particular a cooling device, for an electrical component (100) capable of releasing heat during its operation, this component being in particular a battery, this device comprising an upper plate (2), an intermediate plate (3) and a lower plate (4), the intermediate plate (3) being assembled by being interposed between the upper plate (2) and the lower plate (4), to together form a plurality of circulation channels (5) for a heat transfer fluid, in particular a refrigerant fluid in particular of type R744, the channels (5) extending between a fluid inlet zone (7) and a fluid outlet zone (8), thermal regulation device in which the intermediate plate (3) comprises a plurality of bars (10) each having a perimeter delimiting at least partially at least one of the channels (5),and two bars (10) on either side of the channel (5) being connected to each other by at least one bridge of material (20) which extends in a localized manner across the channel (5) between these bars (10).

2. Device according to the preceding claim, wherein the material bridge (20) has a dimension measured along the direction of flow of the heat transfer fluid which is smaller than the length of the bar (10), the length being measured along the direction of flow of the heat transfer fluid, in particular the material bridge (20) has a dimension measured along the direction of flow of the heat transfer fluid which is at least 5 times smaller, or at least 10 times or 20 times smaller, than the length of the bar, the length being measured along the direction of flow of the heat transfer fluid.

3. Device according to any one of the preceding claims, wherein at least some of the bars (10) are in contact with the rest of the intermediate plate (3) only by the material bridge(s) (20).

4. Device according to any one of the preceding claims, wherein the intermediate plate (3) with the bars (10) which compose it, is brazed with the lower plate (4) and the upper plate (2).

5. Device according to any one of the preceding claims, wherein the upper plate (2) and the lower plate (4) are flat, being devoid of stamped areas.

6. Device according to any one of the preceding claims, wherein, in cross-section in a plane perpendicular to the direction of flow of the heat transfer fluid, the channel or channels (5) have a width which is smaller than the width of the bars (10).

7. Device according to any one of the preceding claims, wherein the material bridge (20) has a dimension in the direction of fluid flow of between 1 mm and 10 mm.

8. Device according to any one of the preceding claims, wherein the material bridge (20) extends into the channel and has a thickness, measured perpendicular to the plane of the plates, which represents at least 10% and at most 55% of the total height of the channel.

9. Device according to any one of the preceding claims, wherein the material bridge (20) is recessed from both faces of the intermediate plate (3).

10. Device according to any one of the preceding claims, wherein the material bridges (20) associated with a row of several parallel channels (5) are arranged along a line, this line being in particular perpendicular to the channels (5) of the row or oblique to the channels (5) of the row.

11. Device according to any one of claims 1 to 9, wherein the material bridges (20) are arranged with an offset along the length of the channels (5) when moving from one channel (5) to the next channel (5).

12. Device according to any one of the preceding claims, wherein the bars (10) are connected to each other by a single material bridge (20) between two neighboring bars (10), or by at least two material bridges (20) between two neighboring bars (10) and arranged at a distance from each other in the direction of fluid flow.

13. Device according to any one of the preceding claims, wherein the intermediate plate (3) is made in one piece, i.e. made in one piece.

14. Device according to any one of claims 1 to 12, wherein the intermediate plate (3) is formed of several pieces which are in particular arranged side by side to form the whole of the intermediate plate (3).

15. Method of manufacturing a thermal regulation device, in particular a cooling device, for an electrical component capable of releasing heat during its operation, this component being in particular a battery, this device comprising an upper plate (2), an intermediate plate (3) and a lower plate (4), - placing the intermediate plate (3) interposed between the upper plate (2) and the lower plate (4), to form together a plurality of circulation channels (5) for a heat transfer fluid, in particular a refrigerant fluid, in particular of type R744, the channels (5) extending between a fluid inlet zone and a fluid outlet zone, the intermediate plate (3) comprising a plurality of bars (10) each having a perimeter delimiting at least partially at least one of the channels (5), and two bars (10) on either side of the channel (5) being connected to each other by at least one material bridge (20) which extends in a localized manner across the channel (5) between these bars (10), - braze together the top plate (2), the middle plate (3) and the bottom plate (4).

16. Method according to the preceding claim, comprising the step of forming the intermediate plate (3) from several pieces which are in particular arranged side by side to form the entire intermediate plate (3).

Images