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

Abstract

1. A heat dissipation device, particularly for a motor vehicle, said device comprising a heat pipe (10) configured for heat exchange between, on the one hand, a hot source (12) comprising an electrical component (14), and, on the other hand, a cold source (16), said device further comprising at least one first thermal interface element (20) in heat exchange contact with said heat pipe (10) and intended to be in heat exchange contact with one of said hot or cold sources (12, 16), said thermal interface element (20) comprising a first housing (22) filled at least partially with a dielectric fluid for heat exchange between said heat pipe (10) and said hot or cold source (12, 16) via said first thermal interface element (20). Figure for the abbreviation: Figure 7

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, to this end, proposes a heat dissipation device, particularly for motor vehicles, said device comprising a heat pipe configured for heat exchange between, on the one hand, a hot source comprising an electrical component, and, on the other hand, a cold source, said device further comprising at least one first thermal interface element in heat exchange relationship with said heat pipe and intended to be in heat exchange relationship with one of said hot or cold sources, said first thermal interface element comprising a first housing filled at least in part with a dielectric fluid for heat exchange between said heat pipe and said hot or cold source via said first thermal interface element.

[0007] Thus, according to the invention, the heat pipe enhances heat dissipation and the first thermal interface element allows heat exchange with the heat pipe while providing electrical insulation thanks to the dielectric fluid.

[0008] In the context of an application to an electrical energy storage device, it is thus possible to reduce the temperature to which the safety devices will be subjected and to avoid their oversizing.

[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 includes a first insert in contact, on the one hand, with said fluid and, on the other hand, with said heat pipe. - said first thermal interface element comprises at least a second insert in contact, on the one hand, with said fluid and, on the other hand, configured to be in contact with a conductor intended to be thermally and electrically connected to said hot or cold source, - said second inserts are two in number, namely a second insert, called positive, and a second insert, called negative, - said first thermal interface element comprises an additional heat exchange surface immersed at least partially in said fluid, - said first housing includes openings for the passage of said first and / or second inserts, - said first housing includes a filling valve, - the said first box has two branches connected by a base, - said first insert is located at the base, - said second inserts are respectively located at the level of one of the branches, - said branches are parallel to each other, - said first and / or second inserts comprise a tubular body extending between two opposite ends, - an internal surface of the body of said first insert forms an exchange surface with said heat pipe, said first and / or second inserts comprise at least one collar extending radially from said body, said collar has a groove to accommodate a sealing gasket and / or an adhesive material, said second inserts are intended to be traversed by fastening elements for said first housing to said hot or cold source, the collar of said second inserts has a front surface forming a heat exchange surface, called external, said front surface being intended to be in contact with said hot or cold source or a head of said fixing members. said front surface protrudes beyond a surface of the first housing, said front surface has a radial extension intended to be greater than a radial extension of the head of the fastening elements, said first and / or second inserts present an exchange surface thermal, said internal, with said fluid in said first case, said first and / or second inserts are made of copper, said first case is made of polymer or ABS. The said first casing comprises two half-casings assembled together, said device is configured so that said heat exchange with the heat pipe occurs between said hot source and said first thermal interface element, said hot, said front surface of the second inserts has a radial extension intended to be greater than a radial extension of electrical connection terminals of said hot source, said device includes another thermal interface element, referred to as a cold element, intended for heat exchange between said heat pipe and said cold source, said cold thermal interface element comprises a body, intended to be in contact with said heat pipe, and a diffuser in contact with said body and intended to be in contact with said cold source, The body of said cold thermal interface component comprises a flange having a sleeve intended to accommodate said heat pipe, said diffuser is formed of a plate, said diffuser has a disc-shaped configuration, said flange is oriented orthogonally to said plate, said device includes a thermal conduction pad, said pad being intended to be located between said cold thermal interface element and said cold source, said device includes an electrically conductive busbar intended to be electrically connected to said heat source, said heat pipe is straight, said heat pipe has a rounded cross-section, said heat pipe has a substantially circular cross-section. said heat pipe is sintered. said heat pipe is twisted, said heat pipe is intended to be substantially horizontal in use, said first insert is oriented parallel to the second inserts, said collars of the first and / or second inserts are two in number per insert and are located at the ends of the body of said first and / or second inserts, said additional heat exchange surface is in contact with said first insert, said additional surface includes a fixing area for said first insert, said additional surface has extensions extending into said branches from said attachment zone, the free ends of said extensions are respectively located at a distance from said second inserts, said heat pipe is intended to be substantially vertical in use, said first insert is oriented substantially orthogonally to the second inserts, The collar of the first insert is unique and located between the ends of the body of said first insert. The collars of the second inserts are two in number per insert and are respectively located at the ends of the body of said second inserts, said additional heat exchange surface is in contact with one of said second inserts, said additional surface includes a fixing area for said second insert, said fixing zone is located at one end of said additional surface, said additional surface has an extension extending in one of said branches from said fixing zone, one free end of said extension is located at a distance from said first insert, - said first housing has a notch for housing the heads of said fastening elements.

[0010] The invention also relates to an electrical connection box for an electrical energy storage device, in particular a battery of accumulators, comprising a hot source, a cold source and a dissipation device as described above.

[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 heat source includes electrical connection terminals, electrically connected to said electrical component and in heat exchange relationship with said dissipation device, - said cold source comprises a plate exhibiting a thermal inertia much greater than the thermal inertia of said hot source.

[0012] The invention further relates to an electrical energy storage device, in particular a battery of accumulators, comprising a connection box and / or a dissipation device as described above.

[0013] Advantageously, the connection box plate includes all or part of a lower face of a housing for the electrical energy storage device.

[0014] The invention further relates to a vehicle comprising a storage device, a connection box and / or a dissipation device as described above.

[0015] 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:

[0016] [Fig-1] schematically illustrates, in side view, a motor vehicle according to the invention;

[0017] [Fig.2] schematically illustrates in perspective, in exploded view, a device of heat dissipation according to a first embodiment of the invention;

[0018] [Fig.3] reproduces [Fig.2] in assembled mode;

[0019] [Fig.4] schematically illustrates in perspective a first interface organ thermal dissipation device of figures 2 and 3, exploded view;

[0020] [Fig.5] schematically illustrates in perspective the thermal interface element of the [Fig.4], in assembled mode, according to a cross-sectional view;

[0021] [Fig.6] schematically illustrates in perspective, in exploded view, the device of thermal dissipation of figures 2 and 3 with a hot source and a cold source;

[0022] [Fig.7] reproduces [Fig.6] in assembled mode;

[0023] [Fig.8] schematically illustrates in perspective the first heat dissipation organ of a second embodiment of the heat dissipation device according to the invention, in exploded view;

[0024] [Fig.9] illustrates schematically in perspective, in exploded view mode, the heat dissipation device according to the second embodiment of the invention with a hot source and a cold source;

[0025] [Fig. 10] reproduces [Fig. 9] in assembled mode.

[0026] It should first be noted that the terms "first", "second", "third", ... are used only to distinguish the components concerned from each other and do not imply any order or possible importance of said components.

[0027] The invention relates to a heat dissipation device, in particular for motor vehicles.

[0028] 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 a vehicle comprising an electric or hybrid motor, connected to said electrical network 3.

[0029] As illustrated in the following figures, said heat dissipation device comprises a heat pipe 10, configured for heat exchange between, on the one hand, a hot source 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.

[0030] Preferably, said heat pipe 10 is straight. Such a configuration promotes its operation. It thus has two opposing longitudinal ends, here tapered. Advantageously, said heat pipe 10 has a rounded cross-section, in particular circular. Said heat pipe 10 is, in particular, sintered and / or twisted.

[0031] As more particularly illustrated in figures 2, 3, 9 and 10, said device further comprises at least a first thermal interface element 20 in heat exchange relationship with said heat pipe 10 and intended to be in heat exchange relationship with one of said hot or cold sources, here said hot source 12.

[0032] According to the invention, said first thermal interface element 20 comprises a first housing 22. Said first housing 22 has, for example, two arms 24a, 24b connected by a base 26, giving it a U-shaped and / or V-shaped configuration. Said Branches 24a and 24b are parallel to each other here. The first housing 22 is, for example, made of polymer or ABS.

[0033] Said first housing 22 has, for example, two large opposing flat faces 28, 30 parallel to each other and connected by lateral faces. In other words, said first housing 22 can be viewed as a rectangular parallelepiped with a groove 32, passing through one of the large faces 28, 30 to the other. Said groove 32 extends from the base 26 to one of the lateral faces opposite said base 26, so that said arms 24a, 24b are defined on either side of said groove 32. Some of the lateral faces here form chamfers 38 at the level of a connection between the base 26 and the arms 24a, 24b.

[0034] Said device is configured so that said heat exchange with the heat pipe 10 takes place, as already stated, between said hot source 12 and said thermal interface element 20, said hot.

[0035] Advantageously, said device includes another thermal interface element 40, said cold, intended for heat exchange between said heat pipe 10 and said cold source 16. Said cold thermal interface element 40 is, in particular, made of copper.

[0036] Said cold thermal interface element 40 comprises, for example, a body 42, intended to be in contact with said heat pipe 10, and a diffuser 44 in contact with said body 42 and intended to be in direct or at least thermal contact with said cold source 16. Said body 42 and said diffuser 44 are, for example, in material continuity with each other.

[0037] The body of said cold thermal interface element 40 here includes a sleeve-shaped flange 46 for receiving said heat pipe 10, in particular one of the longitudinal ends of said heat pipe 10, for example by means of an interference fit such as that known as the H7 / p6 fit. Said sleeve has for this purpose a substantially circular cross-section with an inner diameter close to an outer diameter of said heat pipe 10.

[0038] Said diffuser 44 is formed, for example, of a plate 48. Here, said plate 48 has a disc-shaped configuration. Said flange 46 is oriented orthogonally to said plate 48. Said plate 48 extends radially from a base of said flange 46. Said flange 46 extends coaxially to said plate 48.

[0039] Preferably, said device comprises a thermal conduction pad 50. Said pad 50 is intended to be located between said cold thermal interface element 16, in particular said diffuser 44, and said cold source 16. Said pad 50 is advantageously compressible. It is, for example, a layer of pasty material. It has the advantage of filling any surface defects of said cold thermal interface element 40 and of said cold source 16, in particular on their facing surfaces. Said pad 50 and said plate 48 are here coaxial, with the same diameter. As will become apparent below in relation to the invention, it is not necessary for said bearing 50 to have electrical insulation properties.

[0040] Advantageously, although not illustrated, said device further comprises one or more conduction busbars intended to be connected electrically, or even thermally, to said hot source 12.

[0041] As illustrated in figures 6, 7, 9 and 10, said hot source 12 includes an electrical element 14. Said electrical element 14 is formed here of an electrical protection element, for example an electrical relay and / or a fuse intended to open in the event of an anomaly in the circuit 3. Said hot source 12 includes electrical connection terminals 120a, 120b, electrically and / or thermally connected to said electrical element 14 and in thermal exchange relationship with said dissipation device.

[0042] Said cold source 16 comprises, for example, a plate 160 having a thermal inertia much greater than that of said hot source 12. Said plate 160 may comprise all or part of a lower face of a housing for the electrical energy storage device. Said plate 160 is provided with one or more channels for circulating a heat transfer fluid. It is made, in particular, of an aluminum profile.

[0043] As more clearly seen in figures 4, 5 and 8, according to the invention, said first housing 22 is filled at least in part with a dielectric fluid F allowing heat exchange between said heat pipe 10 and said corresponding heat source, here, as already stated, the hot source 12, via said first thermal interface element 20.

[0044] The first thermal interface element 20 thus allows heat exchange with the heat pipe 10 while providing electrical insulation thanks to the dielectric fluid. The heat pipe 10 therefore has the advantage of not being live. This also explains why the bearing 50 is not necessarily electrically insulating.

[0045] In the various illustrated embodiments, said first thermal interface element 20 comprises a first insert 52 in contact, on the one hand, with said fluid F and, on the other hand, with said heat pipe 10. Said first thermal interface element 20 further comprises at least one second insert 54a, 54b in contact, on the one hand, with said fluid F and, on the other hand, configured to be in contact with a conductor 64 (illustrated in figures 6, 7, 9 and 10), intended to be thermally and electrically connected to said corresponding source, here, as already stated, the hot source 12. Said second inserts are two in number, namely a second insert 54a, referred to as positive, and a second insert 54b, referred to as negative.

[0046] Said first and / or second inserts 52, 54a, 54b are, for example, made of copper.

[0047] Said first and / or second inserts 52, 54a, 54b comprise a tubular, in particular cylindrical, body 58 extending between two opposite ends.

[0048] Said first and / or second inserts 52, 54a, 54b herein comprise at least one collar 60 extending radially from said body 58, in particular at one and / or the other of its ends. Advantageously, said collar 60 has a groove 62, in particular annular, accommodating a sealing gasket and / or an adhesive material (not shown) to provide a seal for said first housing 22.

[0049] An internal surface of the body 58 of said first insert 52 forms a heat exchange surface with said heat pipe 10. Said heat pipe 10 is mounted in said first insert 52, in particular, by an interference fit, in particular that known as H7p6. Said heat exchange surface therefore has a substantially circular cross-section with an internal diameter close to the external diameter of said heat pipe 10.

[0050] The second inserts 54a, 54b are intended to be traversed by fasteners of the first housing 22 to the corresponding source, here, as already stated, the hot source 12. These are, for example, screws. Advantageously, the fasteners form the conductor 64.

[0051] The collar 60 of said second inserts 54a, 54b has a front surface 66 forming a heat exchange surface, said external, said front surface 66 being intended to be in contact with said hot source 12 for one of the front faces located on one side of said second inserts 54a, 54b and / or with a head of said fastening members 64, for one of the front faces located on the other side of said second inserts 54a, 54b.

[0052] Said front surface 66 of the second inserts 54a, 54b has a radial extension intended to be greater than a radial extension of the electrical connection terminals 120a, 120b for the collars 60 located opposite. Alternatively or cumulatively, said front surface 66 has a radial extension intended to be greater than a radial extension of the head of the fastening members 64 for the collars 60 located opposite.

[0053] Said first and / or second inserts 52, 54a, 54b have a heat exchange surface, referred to as internal, with said fluid F in said first housing 22. Said first and / or second inserts 52, 54a, 54b are entirely immersed in the fluid F for their portion located inside said first housing 22. In other words, said first and / or second inserts 52, 54a, 54b are at a distance from the lateral surfaces of the first housing 22. Said internal exchange surface is here formed by an external surface of the body 58 for the portion of said body 58 located between said collars 60.

[0054] Said first housing 22 includes passage holes 56 for said first and / or second inserts 52, 54a, 54b. Said passage holes 56 are located at the level of the said large faces 28, 30 and / or of one of the lateral faces of the said first housing 22. They present a complementary profile, here circular, to those of the said first and / or second inserts 52, 54a, 54b, in particular of their collar 60.

[0055] Said front surface 66 of the collars 60 of the second inserts 54a, 54b is flush beyond a surface of the first housing 22, in this case the large surfaces 28, 30, at the level of said passage holes 56, in particular for the collars 60 located opposite the connection terminals 120a, 120b. Said groove 62 and therefore said seal and / or said adhesive material are located opposite a slice of material of said large faces 28, 30 and / or of the relevant lateral face of said first housing 22.

[0056] Said first insert 52 is located, for example, at the base 26. Said second inserts 54a, 54b are respectively located, for example, at one of the branches 24a, 24b, in particular at the free ends of said branches 24a, 24b.

[0057] In the illustrated embodiments, the first housing 22 comprises two half-cases 22a, 22b. They are joined together, for example, by heat welding. The half-cases are connected to each other at a plane parallel to the large faces 28, 30 of the first housing 22. In other words, each of the large faces 28, 30 of the first housing 22 belongs respectively to one of the half-cases 22a, 22b. Each of the lateral faces of the first housing is formed partly by one of the half-cases 22a, 22b and partly by the other.

[0058] Advantageously, said first housing 22 includes a fluid filling valve 34. It is intended to be located in the upper part of the first housing 22 during filling, or even during use. Here, it is located on one of the lateral faces of the first housing 22 connecting said chamfers 38, near one of them.

[0059] Preferably, said first thermal interface element 20 comprises an additional heat exchange surface 70, immersed at least in part in said fluid F and in heat exchange relationship with at least one of said first and / or second inserts 52, 54a, 54b.

[0060] Specific configurations, in particular said first housing 22 and said additional exchange surface 70, will now be described in relation to each of the illustrated embodiments.

[0061] In figures 4 and 5, according to the first embodiment, said heat pipe 10 is intended to be substantially horizontal in use.

[0062] Said first insert 52 is oriented parallel to the second inserts 54a, 54b. Their passage orifices 56 are located two by two opposite each other at the level of said large faces 28, 30.

[0063] Said collars 60 of the first and / or second inserts 52, 54a, 54b are two per insert and located at the ends of the body of said first and second inserts 52, 54a, 54b.

[0064] Said additional heat exchange surface 70 is in contact with said first insert 52. It includes a fastening zone 72 for said first insert 52, in particular by welding and / or snap-fitting. Said additional heat exchange surface 70 further has extensions 74 extending in said arms 24a, 24b from said fastening zone 72. Free ends of said extensions 74 are respectively located at a distance from said second inserts 54a, 54b.

[0065] In [Fig.8], according to the second embodiment, said heat pipe 10 is intended to be substantially vertical in use.

[0066] Said first insert 52 is oriented substantially orthogonally to the second inserts 54a, 54b.

[0067] The collar 60 of the first insert 52 is unique and located between the ends of the body 58 of said first insert 52. The passage orifice 56 with which it cooperates is located at the level of one of the lateral faces of said first housing, namely here that located between the chamfers 38.

[0068] The collars 60 of the second inserts 54a, 54b are two per insert and are respectively located at the ends of the body 58 of said second inserts. Said passage orifices 56 cooperating with said collars 60 of said second inserts 54a, 54b are located two by two opposite each other at said large faces 28, 30.

[0069] Said additional heat exchange surface 70 is in contact with one of said second inserts 54a, 54b. Here, one of said additional surfaces 70 is provided with each second insert 54a, 54b.

[0070] Said additional surface 70 includes a fixing zone 76 for said second insert 54a, 54b, in particular by welding. Said fixing zone 70 is located at one of the ends of said additional surface 70.

[0071] Said additional surface 70 further has an extension 78 extending in one of said branches 24a, 24b from said fixing zone 76. A free end of said extension 78 is located at a distance from said first insert 52.

[0072] It is further noted that said first housing 22 has a notch 80 for housing the heads of said fixing members 64.

[0073] Referring again to Figures 6 and 7, as well as 9 and 10, it can be seen that said hot source 12 comprises a second housing containing said electrical component 14 and on the surface of which are said connection terminals 120a, 120b. Said second housing comprises a rib 122 between said terminals of connection 120a, 120b. Said rib 122 engages in the groove 32 of said hot thermal interface member 20.

[0074] As already mentioned, said hot source 12 is positioned against said hot thermal interface member 20 by bringing said connection terminals 120a, 120b into contact with the collars 60, provided opposite, of said second inserts 54a, 54b under the effect of the fixing members 64.

[0075] Said connection box further includes herein a support 90 of said hot source 12. Said second box is fixed to said support 90. Said support 90 is intended to be attached to an armature, not illustrated, of said connection box.

[0076] In the first embodiment corresponding to Figures 6 and 7, said hot source 112 is positioned under said heat pipe 10, between its two longitudinal ends. The cold source 16 is oriented substantially vertically.

[0077] In the second embodiment corresponding to Figures 9 and 10, said hot source 112 is positioned in the lower part, below one of the ends of said heat pipe 10. It is radially offset with respect to said heat pipe 10. The cold source 16 is located in the upper part. It is oriented in a substantially horizontal manner.

Claims

Demands

1. Heat dissipation device, in particular for motor vehicle, said device comprising a heat pipe (10) configured for heat exchange between, on the one hand, a hot source (12) comprising an electrical component (14), and, on the other hand, a cold source (16), said device further comprising at least a first thermal interface component (20) in heat exchange relationship with said heat pipe (10) and intended to be in heat exchange relationship with one of said hot or cold sources (12, 16), said thermal interface component (20) comprising a first housing (22) filled at least in part with a dielectric fluid (F) for heat exchange between said heat pipe (10) and said hot or cold source (12, 16) via said first thermal interface component (20).

2. Device according to the preceding claim configured so that said heat exchange with the heat pipe (10) takes place between said hot source (12) and said first thermal interface element (20), said hot, said device comprising another thermal interface element (40), said cold, intended for heat exchange between said heat pipe (10) and said cold source (16), said device comprising a thermal conduction pad (50), said pad (50) being intended to be located between said cold thermal interface element (40) and said cold source (16).

3. Device according to any one of the preceding claims wherein said first thermal interface member (40) comprises a first insert (52) in contact, on the one hand, with said fluid (F) and, on the other hand, with said heat pipe (10), and / or at least a second insert (54a, 54b) in contact, on the one hand, with said fluid (F) and, on the other hand, configured to be in contact with a conductor intended to be thermally and electrically connected to said hot or cold source (12, 16).

4. Device according to the preceding claim in which said second inserts are two in number, namely a second insert (54a), said to be positive, and a second insert (54b), said to be negative.

5. A device according to any one of claims 3 or 4 in which said first housing (22) has two arms (24a, 24b) connected by a base (26), said first insert (52) being located at base level (26) and / or said second inserts (54a, 54b) being respectively located at the level of one of the branches (24a, 24b).

6. Device according to any one of claims 3 to 5 wherein said first and / or second inserts (52, 54a, 54b) comprise a tubular body (58) extending between two opposite ends, said first and / or second inserts (52, 54a, 54b) comprising at least one collar (60) extending radially from said body (58).

7. Device according to the preceding claim wherein said second inserts (54a, 54b) are intended to be traversed by fastening members (64) of said first housing (20) to said hot or cold source (12, 16), the collar (60) of said second inserts (54a, 54b) having a front surface (66) forming a heat exchange surface, said external, said front surface (66) being intended to be in contact with said hot or cold source (12, 16) or a head of said fastening members (64).

8. Device according to any one of claims 3 to 7 in which said first thermal interface element (20) comprises an additional heat exchange surface (70) immersed at least partially in said fluid (F).

9. Device according to the preceding claim in which said heat pipe (10) is intended to be substantially horizontal in use.

10. Device according to the preceding claim in which said additional heat exchange surface (70) is in contact with said first insert (52).

11. Device according to claim 8 in which said heat pipe (10) is intended to be substantially vertical, in use.

12. Device according to the preceding claim in which said additional heat exchange surface (70) is in contact with one of said second inserts (54a, 54b).

13. Electrical connection box for electrical energy storage device, in particular accumulator battery, comprising a hot source (12), a cold source (16) and a device according to any one of the preceding claims.

14. Electrical energy storage device, in particular accumulator battery, comprising a device according to any one of claims 1 to 12.

15. Vehicle comprising a device according to any one of claims 1 to 12.

Images