Heat dissipation device as well as electrical connection box, electrical energy storage device and vehicle including such a heat dissipation device.

Abstract

Heat dissipation device, particularly for motor vehicles, said device comprising one or more heat pipes (10) configured for heat exchange between, on the one hand, one or more hot sources comprising respectively an electrical component, and, on the other hand, a cold source, said device further comprising a first thermal interface component (20) in heat exchange relationship with said heat pipe(s) (10) and intended to be in heat exchange relationship with one of said hot or cold sources, said first thermal interface component (20) comprising a support pillar (22), intended to be in contact with said hot or cold source, a housing (24), intended to be in contact with said heat pipe(s) (10), and an electrically insulating insert (26) forming a thermal bridge between said pillar (22) and said housing (24),said insert having an internal surface (26a) and an external surface (26b) respectively in contact with an external surface of the pillar (22) and an internal surface of the housing (24). Figure for the abbreviation: Figure 2,

Description

Title of the invention: Heat dissipation device as well as electrical connection box, electrical energy storage device and vehicle comprising such a dissipation device.

[0001] The invention relates to a heat dissipation device, particularly for a motor vehicle. It also relates to an electrical connection box for an electrical energy storage device, particularly a battery, comprising such a dissipation device. It further relates to such an electrical energy storage device, particularly a battery, comprising such a box and / or such a dissipation device. It also relates to a vehicle comprising such a storage device, such a box, and / or such a dissipation device.

[0002] In this field, it is known that electric or hybrid vehicles are equipped with a battery pack comprising a casing which houses several electrochemical cells connected together and providing a high voltage at the terminals of the battery, typically a voltage of several hundred volts.

[0003] It is then necessary to equip the battery with an electrical connection box containing safety electrical components (relays, fuses) in order to cut off the current when necessary. These components are connected using busbars through which the input or output current from the battery flows.

[0004] In certain situations, the battery supplies or receives a high electrical power. This is the case, for example, during so-called fast charging of the vehicle's battery, or when the vehicle must exert significant traction. In these situations, the flow of a high-intensity current generates a sharp increase in temperature, particularly in areas commonly referred to as "hot spots," such as safety-critical electrical components, which are then at increased risk of degradation.

[0005] To limit this risk, it is common practice to oversize these components. However, this generates significant bulk, an excessive increase in weight, and an additional cost.

[0006] The invention aims to overcome, at least in part, the aforementioned drawbacks and proposes for this purpose a heat dissipation device, particularly for motor vehicles, said device comprising one or more heat pipes configured for heat exchange between, on the one hand, one or more hot sources comprising respectively an electrical component, and, on the other hand, a cold source, said device further comprising a first thermal interface element in thermal exchange relationship with said heat pipe(s) and intended to be in thermal exchange relationship with one of said hot or cold sources, said first thermal interface element comprising a support pillar, intended to be in contact with said hot or cold source, a housing, intended to be in contact with said heat pipe(s), and an electrically insulating insert forming a thermal bridge between said pillar and said housing, said insert having an internal surface and an external surface respectively in contact with an external surface of the pillar and an internal surface of the housing.

[0007] The dissipation device according to the invention allows for an enlargement of the heat exchange surfaces in a limited space thanks to the contact surfaces created between the pillar and the insert, on the one hand, and, on the other hand, the housing and the insert.

[0008] the pillar, the casing and the insert.

[0009] According to various additional features of the invention, which may be taken together or separately and which constitute so many embodiments of the invention: - said first thermal interface element, in particular said internal and external surfaces, have a cylindrical configuration, - said first thermal interface element has a longitudinal axis and said internal and external surfaces are coaxial with said longitudinal axis, - said pillar has a body extending along said longitudinal axis and a base extending transversely with respect to said body, - said foot has a disc shape, - said first thermal interface element comprises an electrically insulating ring maintaining said housing at a distance from said foot, - said ring is sandwiched between said foot and said casing, - the said ring is pierced by the body of the said pillar, - said casing has one or more first sleeves respectively intended to accommodate said heat pipe(s), - the said first sleeve(s) extend transversely to the longitudinal axis of said first thermal interface element, - said first thermal interface element has two opposing longitudinal ends, - said foot is located at the level of a first of said longitudinal extremities, - said first thermal interface element comprises an electrically insulating cover closing said casing, said cover is located at the level of a second of said longitudinal ends of said thermal interface element, said first thermal interface element comprises one or more electrically insulating spacers to maintain an air gap between said pillar and said casing, said spacers extend parallel to said longitudinal axis of said thermal interface element, said spacers are distributed angularly and regularly around said longitudinal axis, said spacers are positioned at notches formed in the insert and / or the housing, said device includes one or more secondary thermal interface elements in heat exchange relationship with said heat pipe(s) and intended to be in heat exchange relationship with another of said hot or cold sources, the said second thermal interface organ(s) comprise a body for attachment to said other of said hot or cold sources, said second thermal interface element(s) comprise a second sleeve housing said heat pipe(s), said second sleeve is derived from the body of said second thermal interface component, The heat pipe(s) are fixed in the first and / or second sleeve(s) by welding, brazing, crimping and / or by fitting. said heat pipe is straight, said heat pipe has a rounded cross-section, in particular substantially circular, said heat pipe is sintered. said heat pipe is twisted and / or grooved, said device is configured so that said heat exchange between the heat pipe and said first thermal interface element, said cold, occurs with said cold source, said foot is intended to come into contact with said cold source, The said cold thermal interface element(s) are intended to be fixed to said cold source by welding and / or screwing, the first sleeve(s) are located near the second longitudinal end of the first thermal interface element, - the said first sleeve(s) have a longitudinal extension direction inclined relative to the longitudinal axis of said first thermal interface element, - the body of said second thermal interface organ(s) includes a flange for fixing to said hot source, - said flange axially extends said second sleeve, - said device is configured so that said heat exchange between the heat pipe and said first thermal interface element, said hot, occurs with one or more of said hot sources, - said hot thermal interface element is configured to be fixed to said hot source by means of a fixing element intended to pass longitudinally through said pillar, which is provided to be hollow, - said first sleeve extends radially with respect to said pillar, - the body of said second thermal interface organ comprises a base intended to be fixed to said cold source and a pin extending from said base, the second sleeve extending from said pin.

[0010] The invention also relates to an electrical connection box for an electrical energy storage device, in particular a battery of accumulators, comprising one or more hot sources, a cold source and one or more devices as described above for establishing a heat exchange between said hot source(s) and said cold source.

[0011] According to various additional features of the invention, which may be taken together or separately and which constitute so many embodiments of the invention: - said electrical component includes an electrical protection component, - said electrical protection device includes an electrical relay, - said hot source includes a protective casing housing said electrical component, - said protective housing includes electrical connection terminals, electrically connected to said electrical component and in thermal exchange relationship with said device, - said device comprises one or more electrical conduction busbars intended to be electrically connected to said hot source, - said conduction busbar is interposed between a connection terminal of said electrical component and one of said thermal interface components, - said electrical connection terminal is flush with said protective box, - said cold source comprises a plate exhibiting a thermal inertia much greater than that of said hot source - said plate comprises all or part of an underside of a casing of an electrical energy storage device, - there are at least two of these hot springs, - at least some of these hot springs are at the same electrical potential, - the heat pipes associated with said hot sources at the same electrical potential are in a heat exchange relationship with the cold thermal interface element of the said dissipation devices, - the first sleeves of the one or more of said cold thermal interface elements are located at substantially the same level along the longitudinal axis of said cold thermal interface element, - the first sleeves of the one or more of said cold thermal interface elements are distributed angularly around said longitudinal axis of said cold thermal interface element, - at least some of these hot springs exhibit different electrical potentials, - the heat pipes associated with said hot sources, having different electrical potentials, are respectively in a heat exchange relationship with the cold thermal interface element of a different of said heat dissipation devices, - said heat dissipation devices are stacked one on top of the other, - the pillar of said heat dissipation devices is common.

[0012] The invention further relates to an electrical energy storage device, in particular a battery of accumulators, comprising one or more dissipation devices as described above, in particular at the connection box of said storage device.

[0013] The invention also relates to a vehicle comprising one or more dissipation devices as described above, in particular at the level of the vehicle's electrical energy storage device and / or the connection box of said storage device.

[0014] The invention will be better understood, and other objects, details, features and advantages thereof will become more apparent in the course of the detailed explanatory description that follows, of at least one embodiment of the invention given by way of purely illustrative and non-limiting example, with reference to the accompanying schematic drawings, among which:

[0015] [Fig.1] schematically illustrates, in side view, a motor vehicle according to the invention;

[0016] [Fig.2] schematically illustrates, in perspective, a first example of implementation of a heat dissipation device conforming to the invention;

[0017] [Fig.3] illustrates schematically, in perspective, partially, an example of the realization of a connection box incorporating the dissipation device of the [Fig.2];

[0018] [Fig.4] schematically illustrates, in perspective, a second example of implementation of a heat dissipation device conforming to the invention;

[0019] [Fig.5] illustrates schematically, in perspective, in part, an example of the realization of a housing incorporating the dissipation device of the [Fig.4], partially cut according to cutting planes having different orientations;

[0020] [Fig.6] reproduces [Fig.5] by completing it and without cutting plans;

[0021] [Fig.7] schematically illustrates, in perspective, a third example of implementation of a heat dissipation device conforming to the invention;

[0022] [Fig.8] schematically illustrates, in perspective, a fourth example of implementation of a heat dissipation device according to the invention.

[0023] It should first be noted that the terms upstream and downstream used in the following description refer to the direction of flow of the fluid in question. Furthermore, the terms "first", "second", "third", ... are used solely to distinguish the components concerned from one another and do not imply any order or potential importance of said components.

[0024] The invention relates to a heat dissipation device, in particular for motor vehicles.

[0025] As illustrated in [Fig. 1], the invention also relates to an electrical connection box 1, an electrical energy storage device 2, in particular a battery, and a vehicle V comprising such a dissipation device. The latter is placed, for example, in the electrical connection box 1, said box 1 being used for connecting the electrical energy storage device 2 to an electrical network 3 of the motor vehicle V. Said vehicle V is advantageously an electric or hybrid vehicle connected to said electrical network 3.

[0026] As illustrated in the following figures, said heat dissipation device comprises one or more heat pipes 10, configured for heat exchange between, on the one hand, one or more hot sources 12 and, on the other hand, a cold source 16. By "heat pipe", we mean a heat-conducting element allowing a fluid to circulate inside the element, in particular by capillarity and / or by gravity, this in a closed cycle according to a principle of successive evaporation and condensation of the fluid.

[0027] In embodiments of figures 2 to 6, the heat pipe 10 is unique and the dissipation device according to the invention is dedicated to heat exchange between said cold source 16 and a single hot source 12. In embodiments of figures 7 and 8, there are several hot sources 12 and a heat pipe between each of said hot sources 12 and the cold source 16.

[0028] Preferably, said heat pipe(s) 10 are straight. They have, for example, a rounded cross-section, in particular circular. Said heat pipe(s) 10 are, in particular, sintered and / or grooved.

[0029] The said hot source(s) 12 include an electrical component 14. The said electrical component 14 is here formed of an electrical protection component, for example an electrical relay and / or a fuse intended to open in the event of an anomaly in the circuit 3. The said electrical component 14 includes, for example, a coil, not visible.

[0030] Said hot source 12 further includes here a protective housing 200 housing said electrical component 14. Said coil is housed in said housing 200.

[0031] Said hot source 12 comprises electrical connection terminals 210, electrically connected to said electrical component 14, in particular said coil, and in heat exchange relationship with said dissipation device. In the figures, the electrical connection terminal related to the illustrated dissipation device is not visible, but another of said connection terminals is, the corresponding dissipation device not having been illustrated.

[0032] Said connection terminals 210 include, for example, sockets, passing through said protective housing 200. Said electrical connection terminals 210, in particular said sockets, are flush with said protective housing 200.

[0033] Said dissipation device is fixed to said protective housing 200 and / or in heat exchange with said protective housing 200, in particular by means of a fastening element such as a screw 202, engaged in said sleeve. Said sleeve is located, for example, on a face 204 of said protective housing. Said screw 202 is oriented here substantially perpendicular to said face 204.

[0034] Said housing 200 is, in particular, substantially parallelepiped in shape. It is fixed, for example, to said cold source 16, in particular by means of fixing tabs 206.

[0035] Said cold source 16 comprises, for example, a plate 18 having a thermal inertia much greater than that of said hot source(s) 12. Said plate 18 may comprise all or part of a lower face of a housing of the electrical energy storage device. Said plate 18 is here provided with channels for circulating a heat transfer fluid.

[0036] Said device further comprising a first thermal interface element 20 in thermal exchange relationship with said heat pipe(s) 10 and intended to be in thermal exchange relationship with one of said hot or cold sources.

[0037] As particularly visible in Figures 2 and 5, according to the invention, said first thermal interface element 20 comprises a support pillar 22, intended to be in contact with said hot or cold source, a housing 24, intended to be in contact with said heat pipe(s) 10, and an electrically insulating insert 26 forming a thermal bridge between said pillar 22 and said housing 24. In addition, said insert 26 has an internal surface 26a and an external surface 26b respectively in contact with an external surface of the pillar 22 and an internal surface of the housing 24.

[0038] The dissipation device according to the invention thus makes it possible to enlarge the heat exchange surfaces, in a limited space, thanks to the contact surfaces created between the pillar 22 and the insert 26, on the one hand, and, on the other hand, the housing 24 and the insert 26.

[0039] Preferably, said first thermal interface element 20, in particular said internal and external surfaces 26a, 26b, have a cylindrical configuration. Said first thermal interface element 20 thus has a coaxial configuration with the pillar 22, the insert 26 and the housing 24. Said pillar 24 is located inside and said housing 24 outside, while the insert 26 is located concentrically between said pillar 22 and said housing 24, in the manner of a radial stack.

[0040] Said first thermal interface element 20 has a longitudinal axis X, Z and said internal and external surfaces 26a, 26b are coaxial with said longitudinal axis X, Z. In [Fig.3], it can be seen that said longitudinal axis is substantially perpendicular to said plate 18. In [Fig.5], alternatively, it is located in a plane substantially parallel to said plate 18.

[0041] According to the various embodiments illustrated, said pillar 22 has a body 30 extending along said longitudinal axis X, Z and a foot 32 extending transversely with respect to said body 30.

[0042] Said foot 32 is intended to come into contact with said cold or hot source 12, 16 in a heat exchange relationship with said first thermal interface element 20. Said foot 32 is here in the shape of a disc. Alternatively, not illustrated, it is rectangular or even square. Said first thermal interface element 20 has two opposing longitudinal ends. Said foot 32 is located at the level of a first of said longitudinal ends.

[0043] Advantageously, said first thermal interface member 20 comprises an electrically insulating ring 34, maintaining said housing 24 at a distance from said foot 32. Said ring 34 is, for example, sandwiched between said foot 32 and said housing 24. Said ring 34 is traversed by the body 30 of said pillar 22. It is coaxial with said pillar 22, said insert 26 and said housing 24.

[0044] Said housing 24 has, in particular, one or more first sleeves 36 respectively intended to accommodate said heat pipe(s) 10. Said first sleeve(s) 36 extend transversely to the longitudinal axis X, Z of said first thermal interface element 20. They originate from a body 25 of said housing 24, said body 25 of the housing 24 being oriented along said longitudinal axis X, Z.

[0045] Said first thermal interface element 20 further comprises herein an electrically insulating cover 38 closing said housing 24, or at least a recess formed between said housing 24 and said pillar 22 to accommodate said insert 26. For the first embodiment, said cover 38 is shown only in [Fig. 3]. Said cover 38 is located at a second of said longitudinal ends of said thermal interface element 20, namely the longitudinal end opposite to that where said foot 32 is located.

[0046] According to the various embodiments illustrated, but as best seen in [Fig. 2], said first thermal interface element 20 comprises one or more electrically insulating spacers 40 to maintain an air gap between said pillar 22 and said housing 24. Said spacers 40 are in contact with said housing 24 and extend radially towards said pillar 22 while remaining at a distance from it. They limit the risk of unwanted contact between said pillar 22 and said housing 24, which could cause an electrical short circuit.

[0047] The spacers 40 extend parallel to the longitudinal axis X, Z of the thermal interface element 20. They are distributed angularly around the longitudinal axis X, Z, in particular in a regular manner. Advantageously, the spacers 40 are positioned at notches formed in the insert 26 and / or the housing 24. This facilitates, among other things, their assembly.

[0048] Said device includes one or more second thermal interface elements 50 in heat exchange relationship with said heat pipe(s) 10 and intended to be in heat exchange relationship with the other of said hot or cold sources 12, 16.

[0049] According to the various embodiments illustrated, the second thermal interface element(s) 50 comprise a body 52 for fixing to said hot or cold source in question.

[0050] Said or said second thermal interface members further comprise herein a second sleeve 54 housing the or one of said heat pipes 10. Said second sleeve 54 is originating from the body 52 of said second thermal interface member 50.

[0051] The heat pipe(s) 10 are fixed in the first or second sleeve(s) 36, 54, for example, by welding, brazing, crimping and / or by press-fitting, in particular according to a fit known by reference H7p6. They are here fixed in the said first or second sleeves 36, 54 in the vicinity of a longitudinal end of the said inserts 10, provided inserted in the said first or second sleeves 36, 54.

[0052] According to the embodiment shown in Figures 2 and 3, said device is configured such that said heat exchange involving said first thermal interface element 20 is in contact with said cold source 16. Said first thermal interface element 20 is thus said to be cold. Said second thermal interface element 50 is then in a heat exchange relationship with said hot source 12. Said second thermal interface element 50 is thus said to be hot.

[0053] Said second thermal interface element 50 and, consequently, said heat pipe 10 and said housing 24 are electrically energized. Conversely, thanks to the insert 26 and, in this case, to the ring 34, said pillar 22 is electrically insulated and is not energized. Said pillar 22, in particular said base 32, can therefore be in direct contact with said cold source 16, in particular with said plate 18.

[0054] Preferably, the cold thermal interface element(s) 20 are intended to be fixed to the cold source 16 by welding and / or screwing, in particular by the base 32 of the pillar 22. The pillar 22 extends, for example, perpendicularly to the plate 18.

[0055] The said first sleeve(s) 36 are located, for example, near the second longitudinal end of said cold thermal interface member 20 so that, in use, said cold thermal interface member 20 is higher than said hot thermal interface member 50.

[0056] More generally, the sleeve(s) 36 have a longitudinal extension direction inclined with respect to the longitudinal axis Z of said cold thermal interface member 20 allowing a part of said heat pipe 10 in contact with said cold thermal interface member 20 to be higher than a part of the heat pipe 10 in contact with said hot thermal interface member 50.

[0057] In order to further promote heat transfer, the said first sleeve(s) 36 have a radius of material with the body 25 of the housing 24.

[0058] On the side of said second thermal interface organ(s) 50, their body 52 includes a flange 56 for fixing to said hot source 12. Here, said flange 56 axially extends said second sleeve 54, with or without radial offset.

[0059] The body 52 of said second thermal interface elements 50 and / or said flange 56 are intended to extend in a plane substantially parallel to the face 204 of said protective housing 200. Said screw 202 passes through said flange 56.

[0060] According to the embodiment shown in Figures 4 to 6, said device is configured so that said heat exchange involving said first thermal interface element 20 is in contact with said hot source 12. Said first thermal interface element 20 is thus said to be hot. Said second thermal interface element 50 is then in a heat exchange relationship with said cold source 16. Said second thermal interface element 50 is thus said to be cold.

[0061] Said pillar 22 is electrically energized. Thanks to the insert 26 and here to said ring 35, said housing 24 is electrically insulated and is not energized. Said heat pipe 10 and, consequently, said second thermal interface element 50 are therefore also not energized. Said second thermal interface element 50 can therefore be in direct contact with said cold source 16, in particular with said plate 18.

[0062] Said foot 32 of pillar 22 extends parallel to said face 204 of protective housing 200. Said body 30 of said pillar 32 extends perpendicularly to face 204 of said protective housing 200.

[0063] Said hot thermal interface element 20 is configured to be fixed to said hot source 12, for example, by means of a fastening element intended to pass longitudinally through said pillar 22, which is provided to be hollow for this purpose. Said fastening element is formed, for example, by the screw 202 mentioned above. A head 208 of said screw 202 bears against the cover 38 of said first thermal interface element 20.

[0064] Said first sleeve 36 extends here radially with respect to the body 25 of said housing 24.

[0065] On the side of said second thermal interface element 50, the body 52 of said second thermal interface element 50 comprises a base 58 intended to be fixed to said cold source 16 and a pin 60, advantageously hollow, extending from said base 58. The second sleeve 54 extends here from said pin 60, for example radially.

[0066] Said sole 58 extends, for example, parallel to said plate 18. Said pin 60 is oriented perpendicular to said plate 18.

[0067] According to the various embodiments illustrated, in addition to the hot source(s) 12, the cold source 16 and one or more dissipation devices intended to establish a heat exchange between the hot source(s) 12 and the cold source 16, as described above, said electrical connection box according to the invention includes one or more electrical conduction busbars 100 intended to be electrically connected to said hot source 12, in particular said electrical component 14.

[0068] The said busbar(s) 100 are also intended to be electrically connected to another electrical component, not shown, of said connection box and / or said electrical network 3.

[0069] In the illustrated embodiments, only one of said omnibus bars 3 has been shown. It is shown here bent. It is provided with openings 102 for the passage of electrical connectors. In the figures, one of the holes 102 is visible while the other, through which the screw 202 passes, is not.

[0070] Said busbar 100 is interposed here between one of the connection terminals of said electrical component 14, namely the socket mentioned above, and one of said first or second thermal interface components 20, 50. In the first embodiment, said busbar 100 is sandwiched between said flange 56 and face 204 of the protective housing 204. In the second embodiment, it is sandwiched between said foot 32 and said face 204 of the protective housing 204.

[0071] In each case, heat is transferred to the first or second thermal interface element 20, 50 in question via said busbar 100 and / or by the screw 202. The latter thus forms both a thermal bridge and an electrical connection component linking said electrical element 14 and said busbar 100. It is understood that it is via said busbar 100 that said flange 56, in the first embodiment, and said foot 32, in the second embodiment, are electrically energized.

[0072] The embodiment illustrated in [Fig.7] takes up the first embodiment with this time several said heat pipes 10, here four, connected to said cold thermal interface element 20. Each of said heat pipes 10 is respectively intended to be in heat exchange relationship with said hot source 12, in particular through one of said second hot thermal interface elements 50.

[0073] In other words, in the corresponding connection box, not illustrated, the said hot sources are at least two, here four.

[0074] Preferably, at least some of said hot sources are at the same electrical potential, and the heat pipes 10 associated with said hot sources are also at the same electrical potential. As will be understood, said heat pipes 10 are in a heat exchange relationship with the cold thermal interface element 20 of one or more of said dissipation devices.

[0075] The first sleeves 36 of said cold thermal interface element 20 are located substantially at the same level along the longitudinal axis Z of said cold thermal interface element 20. They advantageously have the same inclination. They are distributed angularly around said longitudinal axis of the cold thermal interface element 20, preferably in a regular manner, therefore here, at 90° to each other.

[0076] Alternatively or cumulatively, said hot sources or, at the very least, some of said hot sources exhibit different electrical potentials.

[0077] Such an embodiment is illustrated in [Fig. 8] where the heat pipes 10 associated with said hot sources having different electrical potentials are respectively in a heat exchange relationship with the thermal interface element cold 20 of a different of the said heat dissipation devices, respectively illustrated 300, 300' in this figure.

[0078] For this purpose, here, the said heat dissipation devices 300, 300' are stacked one on top of the other, in particular along said longitudinal direction Z.

[0079] In the illustrated example, the dissipation device 300 intended to be in contact with said cold source, i.e. the one below in [Fig.8], is identical to that of [Fig.7], with the exception of said pillar 22 which is advantageously common to said thermal dissipation devices 300, 300'.

[0080] Said dissipation devices 300, 300' are electrically isolated from each other by the cover 38 of the one 300 below.

[0081] In the illustrated embodiment, the dissipation devices 300, 300' have an identical axial and / or angular distribution of their first sleeve 36. These sleeves also have the same orientation. In other words, the hot sources intended to be connected to the dissipation devices 300, 300' are configured to be located, in pairs, one below the other.

Claims

Demands

1. A heat dissipation device, particularly for a motor vehicle, said device comprising one or more heat pipes (10) configured for heat exchange between, on the one hand, one or more hot sources (12) each comprising an electrical component (14), and, on the other hand, a cold source (16), said device further comprising a first thermal interface component (20) in heat exchange with said heat pipe(s) (10) and intended to be in heat exchange with one of said hot or cold sources (12, 16), said first thermal interface component (20) comprising a support pillar (22) intended to be in contact with said hot or cold source (12, 16), a housing (24) intended to be in contact with said heat pipe(s) (10), and an electrically insulating insert (26) forming a thermal bridge between said pillar (22) and said housing (24),said insert having an internal surface (26a) and an external surface (26b) respectively in contact with an external surface of the pillar (22) and an internal surface of the housing (24).

2. Device according to claim 1 in which said first thermal interface element (20), in particular said internal and external surfaces (26a, 26b), have a cylindrical configuration.

3. Device according to any one of the preceding claims in which said pillar (22) has a body (30) extending along a longitudinal axis (X, Z) of said first thermal interface member (20) and a foot (32) extending transversely with respect to said body (30), said first thermal interface member (20) comprising an electrically insulating ring maintaining said housing (24) at a distance from said foot (32).

4. Device according to any one of the preceding claims in which said housing (24) has one or more first sleeves (36) respectively intended to accommodate said heat pipe(s) (10).

5. Device according to any one of the preceding claims wherein said first thermal interface member (20) comprises one or more electrically insulating spacers (40) to maintain an air gap between said pillar (22) and said housing (24).

6. Device according to any one of the preceding claims comprising one or more second thermal interface elements (50) in heat exchange relationship with said heat pipe(s) (10) and intended to be in heat exchange relationship with another of said hot or cold sources (12, 16).

7. Device according to the preceding claim in which said or said second thermal interface members (50) comprise a second sleeve (54) accommodating the or one of said heat pipes (10).

8. Device according to any one of claims 4 and / or 7 in which said heat pipe(s) (10) are fixed in said first and / or second sleeve(s) (36, 54) by welding, brazing, crimping and / or by fitting.

9. Device according to any one of the preceding claims configured so that said heat exchange between the heat pipe (10) and said first thermal interface element (20), said cold, takes place with said cold source (16).

10. Device according to any one of claims 1 to 8 configured so that said heat exchange between the heat pipe (10) and said first thermal interface element (20), said hot, occurs with the or one of said hot sources (12).

11. Electrical connection box for electrical energy storage device, in particular accumulator battery, comprising one or more hot sources (12), a cold source (16) and one or more devices (300, 300') according to any one of the preceding claims for establishing a heat exchange between said hot source(s) (12) and said cold source (16).

12. Housing according to claim 11, taken in its connection with claim 9, in which at least some of said hot sources (12) are at the same electrical potential, the heat pipes (10) associated with said hot sources (12) at the same electrical potential being in heat exchange relationship with the cold thermal interface element (20) of the or one of said dissipation devices (300, 300').

13. A housing according to any one of claims 11, taken in its connection with claim 9, or 12, wherein at least some of said hot sources (12) have different electrical potentials, the heat pipes (10) associated with said sources hot (12) having different electrical potentials being respectively in thermal exchange relationship with the cold thermal interface element (20) of a different of said thermal dissipation devices (300, 300').

14. Electrical energy storage device, in particular accumulator battery, comprising one or more of the dissipation devices according to any one of claims 1 to 10.

15. Vehicle comprising one or more of the dissipation devices according to any one of claims 1 to 10.

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