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

Abstract

A heat dissipation device, particularly for a motor vehicle, said device being configured for heat conduction 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 comprising a thermal interface component (20), referred to as hot, configured to be in a heat exchange relationship with said hot source (12), and a plurality of thermal interface components (18), referred to as cold, configured to be in a heat exchange relationship with said cold source (16) according to a spatial distribution divided into several distinct zones (R1, R2, …), said device being further configured for heat exchange between said hot thermal interface component (12) and said cold thermal interface components (18). 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, to this end, proposes a heat dissipation device, particularly for motor vehicles, said device being configured for heat conduction between, on the one hand, a hot source comprising an electrical component, and, on the other hand, a cold source, said device comprising a thermal interface component, referred to as the hot source, configured to be in a heat exchange relationship with said hot source, and a plurality of thermal interface organs, called cold, configured to be in thermal exchange relationship with said cold source according to a spatial distribution spread over several distinct zones, said device being further configured for thermal exchange between said hot thermal interface organ and said cold thermal interface organs.

[0007] By distributing the exchange surfaces at several points of the cold source from the same hot point, it is possible to expand the exchange surface with the cold source despite a potential congestion of the latter.

[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. Indeed, increasing the exchange surface area promotes heat dissipation from the hot source to the cold source.

[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 device comprises heat pipes configured for heat exchange between, on the one hand, said hot thermal interface element and, on the other hand, said cold thermal interface elements, - the hot and / or cold thermal interface components include sleeves housing said heat pipes, - the said hot and / or cold thermal interface element(s) are configured to allow angular orientation of said heat pipes, - said hot and / or cold thermal interface elements comprise a load-bearing part, thermally connected to said hot or cold source, and a contact part, in a ball-and-socket joint relative to said load-bearing part, said corresponding heat pipe being fixed to said contact part, - said load-bearing part includes a housing configured to accommodate said contact part, - the contact piece includes a movable rounded projection within said housing, - the contact piece includes the aforementioned sleeve(s) housing the heat pipes, - said heat pipes are welded, in particular brazed, and / or crimped to said contact parts, - the rounded projection of the contact piece of said cold thermal interface elements is located in an axial extension of said sleeve, said cold thermal interface elements include a diffuser linked to said carrier part and intended to enter into a heat exchange relationship with and / or in contact with said cold source, said load-bearing piece flares out towards said diffuser by curved shapes, said device includes thermal conduction pads presenting electrical insulating properties, said bearings are respectively intended to be located between one of said cold thermal interface components and said cold source, of the said cold thermal interface elements there are at least two, said hot thermal interface element is substantially in the middle of said cold thermal interface elements, There are two sleeves at the level of the said hot thermal interface component, said sleeves of the same hot thermal interface element are in axial extension of each other, said rounded projection of the contact piece of said hot thermal interface element extends transversely, in particular radially, relative to the sleeves of said hot thermal interface element, said hot thermal interface element is configured to apply an elastic force between said heat pipes and said cold thermal interface elements, said hot thermal interface element comprises a rod configured to apply said force, said stem comprises an elongated body and a head forming said load-bearing piece, said load-bearing part is elastically mobile relative to said body in order to exert said force, said rod includes a spring bearing on said body and exerting said force on said load-bearing part, said body and said load-bearing part slide one inside the other in a translational movement along a longitudinal extension direction of said rod, said device includes a support configured for fixing said hot source and / or intended to be fixed to said cold source said rod includes a nut for fixing said body to said support, said body includes a pin passing through said support, said nut being fixed on said pawn, - said hot and / or cold thermal interface elements have a first heat exchange surface in contact with said heat pipe and a second heat exchange surface, intended to come into contact with said hot or cold source in question, - said heat pipes are inclined so that, in use, a first zone of the heat pipes in heat exchange with said hot thermal interface element is vertically at a level lower than that of a second zone of the heat pipes in heat exchange with said corresponding cold thermal interface element, - said heat pipes are straight, - said heat pipes have a rounded cross-section, - said heat pipes have a substantially circular cross-section, - said heat pipes are sintered.

[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 can 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, - the said electrical connection terminals are traversed by the said rod, - said electrical connection terminals are fixed to said support, in particular by the said nut, - said enclosure includes an electrical conduction busbar intended to be electrically connected to said heat source, - said electrical conduction busbar is traversed by said rod, - said electrical conduction busbar is fixed to said support, in particular by the said nut, - 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] The invention also relates to a vehicle comprising an electrical energy storage device, in particular a battery of accumulators, a connection box and / or a dissipation device as described above.

[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 part of a casing of connection incorporating a dissipation device according to the invention;

[0017] [Fig.3] reproduces [Fig.2], some of the parts being illustrated according to a cross-sectional view longitudinal;

[0018] [Fig.4] schematically illustrates in perspective, in exploded view, a part of the heat dissipation device shown in [Fig.2];

[0019] [Fig.5] schematically illustrates in perspective, in partially exploded view, the heat dissipation device of [Fig.2], completed in relation to [Fig.4];

[0020] [Fig.6] schematically illustrates in perspective, in partially exploded view, the heat dissipation device of [Fig.2], completed in relation to [Fig.5];

[0021] [Fig.7] reproduces [Fig.6] in longitudinal section view;

[0022] [Fig.8] illustrates schematically in perspective, in partially exploded mode, the heat dissipation device of [Fig.2], completed in relation to [Fig.6];

[0023] [Fig.9] schematically illustrates in perspective, in partially exploded view, the heat dissipation device of [Fig.2], completed in relation to [Fig.8];

[0024] [Fig. 10] reproduces a central part of [Fig.9] in longitudinal section view, in a first and a second configuration;

[0025] [Fig. 11] illustrates in side view the dissipation device of the [Fig.2], some of the parts being illustrated according to a longitudinal section plane;

[0026] [Fig. 12] illustrates in perspective, in exploded mode, some of the parts of the connection box of the [Fig.2];

[0027] [Fig. 13] illustrates the connection box of [Fig.2] according to a longitudinal section plane.

[0028] 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.

[0029] The invention relates to a heat dissipation device, in particular for motor vehicles.

[0030] 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.

[0031] As shown in Figures 2, 3, 12 and 13, said heat dissipation device is configured for heat conduction between, on the one hand, a hot source 12 comprising an electrical element 14, and, on the other hand, a cold source 16.

[0032] Said cold source 16 comprises, for example, a plate 52 having a thermal inertia much greater than that of said hot source 12. Said plate 52 may comprise all or part of a lower face of a housing of the electrical energy storage device. Said plate 52 is provided with one or more channels for circulating a heat transfer fluid.

[0033] As shown in Figures 2, 3, 9, 10, 11, 12 and 13, said device comprises a thermal interface element 20, referred to as hot, configured to be in a heat exchange relationship with said hot source 12, and a plurality of thermal interface elements 18, referred to as cold, configured to be in a heat exchange relationship with said cold source 16 according to a spatial distribution divided into several distinct zones RI, R2, as illustrated in Figures 2, 3, 5 and 13. Said device is further configured for heat exchange between said hot thermal interface element 20 and said cold thermal interface elements 18.

[0034] Thus, the heat exchange surfaces are distributed at several points on the cold source 16 from a single hot point to increase the heat exchange surface area with the cold source 16 despite the potential bulkiness of the latter. Preferably, each cold thermal interface element 18 is associated with one of said zones RI, R2, .... Said zones RI, R2, ... are advantageously located on the surface of the cold source 16.

[0035] In the embodiment illustrated by figures 2 to 13, said device comprises heat pipes 10 configured for heat exchange between, on the one hand, said hot thermal interface element 20 and, respectively, said cold thermal interface elements 18. 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.

[0036] Alternatively, all or part of the heat pipes 10 can be replaced by another heat conduction element.

[0037] Preferably, said heat pipes 10 are straight. They have, for example, a rounded cross-section. In particular, they have a substantially circular cross-section. Said heat pipes 10 may be sintered and / or grooved.

[0038] Preferably, the hot thermal interface members 20 and / or cold thermal interface members 18 comprise sleeves 184, 185 accommodating said heat pipes 10. In the illustrated embodiment, such sleeves 184, 185 are provided both at the hot thermal interface member 20, with regard to the illustrated sleeves 185, and at the cold thermal interface members 18, with regard to the illustrated sleeves 184.

[0039] Advantageously, the hot thermal interface element(s) 20 and / or cold thermal interface element(s) 18 are configured to allow free angular orientation of the heat pipe(s). Thus, for example, when the heat pipe 10 is straight, the longitudinal axis of the heat pipe 10 can be oriented angularly with respect to the said thermal interface element(s) 18, 20.

[0040] Preferably, said hot 20 and / cold 18 thermal interface elements comprise a carrier piece 180, thermally connected to said hot 12 or cold 16 source. Said hot 20 and / cold 18 thermal interface elements comprise a contact piece 181, in a ball joint connection with respect to said carrier piece 180. Said corresponding heat pipe 10 is fixed to said contact piece 181.

[0041] To form said ball joint, said carrier piece 180 may include a housing 182 configured to receive said contact piece, as shown in Figures 5, 8 and 9. The contact piece 181 may include a rounded projection 183 movable in said housing 182.

[0042] Advantageously, said carrier piece 180 has openings 188a, 188b allowing the passage of pins 187a, 187b. Each of said openings 188a, 188b is opposite another opening not shown allowing the pins 187a, 187b to pass through the housing 182 from one side to the other when they are inserted into the openings 188a, 188b. The openings 188a and 188b are separated by a distance strictly less than the diameter of the rounded projection 183 so that these pins 187a, 187b prevent the rounded projection 183 from coming out of the housing 182 after the rounded projection is inserted into the housing 182, when said pins 187a, 187b are inserted into the openings 188a, 188b.

[0043] Said contact piece 181 may include said sleeve(s) 184, 185 housing heat pipes 10.

[0044] Said heat pipes 10 can be welded, in particular brazed, and / or crimped to said contact parts 181.

[0045] By way of example, said heat pipes 10, in particular a first end of said heat pipes 10, is fitted into a respective sleeve 184 and held in said sleeve 184 by welding and / or crimping. The second end of said heat pipes 10 is fitted into a respective sleeve 185 and held in said sleeve 185 by welding and / or crimping

[0046] Advantageously, the rounded projection 183 of the contact piece 181 of said cold thermal interface members 18 is located in an axial extension of the corresponding sleeve 184.

[0047] In the embodiments illustrated in the figures, said cold thermal interface elements 18 may include a diffuser 24 connected to said corresponding carrier piece 180 and intended to come into contact with said cold source 16. Said carrier piece 180 and said diffuser 24 are, for example, made of continuous material. Said first cold thermal interface elements 18 are, in particular, made of copper.

[0048] Preferably, although not visible in the figures, said carrier piece 180 of said cold thermal interface members 18 flares out towards said diffuser 24 by means of curved shapes. Such shapes promote heat conduction within said cold thermal interface member 18.

[0049] Preferably, the device comprises thermal conduction pads 44 having electrical insulation properties. These pads 44 are respectively intended to be located between one of the cold thermal interface elements 18 and the cold source 16. The pads 44 are intended to be located, for example, between the diffusers 24 and the cold source 16. The pads 44 are advantageously compressible. Alternatively, instead of the pads 44, the device comprises, for example, a layer of paste-like material having thermal conduction and electrical insulation properties.

[0050] Said hot thermal interface element 20 is, for example, substantially in the middle and / or center of said cold thermal interface elements 18, in particular when said cold thermal interface elements 18 are two in number as illustrated in the figures.

[0051] The sleeves 185 are here two in number at the level of said hot thermal interface member 20. They are, for example, in the axial extension of each other.

[0052] Alternatively, there are three of said cold thermal interface elements 18. In this variant, the three cold thermal interface elements 18 are distributed at 120° to each other around the hot thermal interface element 20.

[0053] Thus, said cold thermal interface elements 18 are advantageously distributed angularly in a regular manner around each other around the hot thermal interface element 20.

[0054] Similarly, the sleeves 185 are advantageously distributed angularly in a regular manner from one another at the level of the hot thermal interface element 20.

[0055] Preferably, said rounded projection 183 of the contact piece 181 of said hot thermal interface member 20 extends transversely, in particular radially, with respect to the sleeves 185 of said hot thermal interface member 20.

[0056] As shown in Figures 2, 3, 10, 12 and 13, said hot thermal interface member 20 can be configured to apply a force F between said heat pipes 10 and said cold thermal interface members 18. Such a force has been illustrated in the figures by an arrow labeled F. This force makes it possible, for example, to compress said bearing 44.

[0057] Preferably, said force F is elastic in nature. The elastic nature of the force arises from the components used to apply it and / or from the elasticity of the materials used.

[0058] In the various embodiments illustrated, said hot thermal interface member 20 comprises a rod 60 configured to apply said force F.

[0059] Preferably, said rod 60 has thermal conductivity properties so as to form said hot thermal interface member 20. It is, for example, made of copper.

[0060] In the embodiment illustrated in the figures, said rod 60 comprises an elongated body 601 and a head 602 forming the bearing part of the ball joint. Said head 602 is thus elastically movable relative to said elongated body 601 to exert said force F.

[0061] In the embodiment shown in [Fig. 10], said rod 60 comprises a spring 603 bearing against said elongated body 601 and exerting said force F on said head 602. In [Fig. 10], the diagram on the right shows the spring 603 uncompressed by the supporting part. The diagram on the left shows the spring 603 compressed, which results in the force F being exerted on the heat pipes 10 and the cold thermal interface elements 18, advantageously compressing the bearings 44.

[0062] Said elongated body 601 and said head 602 slide into each other in a translational movement along a longitudinal extension direction of said rod 60. This extension direction is represented by arrow D on [Fig. 10].

[0063] According to the embodiment shown in the figures, and in particular in [Fig. 10], the elongated body 601 comprises a first longitudinal housing 604 in which the spring 603 is housed. The first longitudinal housing 604 comprises a first bearing surface 605 against which a first end of the spring 603 bears. The supporting piece forming the head 602 comprises a second longitudinal housing 606 in which the elongated body 601 can slide. The second longitudinal housing 606 comprises a second bearing surface 607 against which a second end of the spring 603 bears.

[0064] Said first longitudinal housing 604 and said second longitudinal housing 606 have coaxial cylindrical shapes.

[0065] As illustrated in [Fig. 2], 3, 12 and 13, said device comprises, for example, a support 30, in particular made of reinforced ABS. The support 30 can be configured for mounting said hot source 12 and / or intended to be mounted on said cold source 16.

[0066] Said rod 60 may include a fixing nut 608 for fixing said application member 40 to said support 30.

[0067] Said rod 60 may include a pin 609 intended to pass through said support 30. Said fixing nut 608 is fixed on said pin 609.

[0068] According to one embodiment, as more particularly visible in figures 5, 7 and 13, said cold thermal interface members 18 each have a first heat exchange surface 18a in contact with said heat pipe 10 and a second heat exchange surface 18b intended to come into contact with said cold source for heat exchange between said heat pipe 10 and said cold source via said cold thermal interface member 18.

[0069] Said diffuser 24 is formed, for example, of a plate. Said plate extends here beyond a junction surface between said carrier piece 180 and said diffuser 24 so that the diffuser 24 has a heat conduction surface that is enlarged relative to said carrier piece 180 in the direction of said cold source 16.

[0070] Said second cold exchange surface 18b is defined here by a lower face of the diffuser 24. Advantageously, said second cold exchange surface 18b has a shape designed to fit an upper face of said cold source 16, which is here provided to be substantially flat. In the illustrated embodiments, said second cold exchange surface 18b is flat.

[0071] Said pad 44 is intended to be located, for example, between said second cold exchange surface 18b and said cold source 16, in particular between said diffuser 24 and said cold source 16.

[0072] Said hot thermal interface element 20 has, for example, a first heat exchange surface 20a, said to be hot, in contact with said heat pipe 10 ([Fig.5]) and a second heat exchange surface 20b, said to be hot, intended to come into contact with said hot source 12 ([Fig. 10]), for a heat exchange between said heat pipe 10 and said hot source 12 via said second thermal interface element 20.

[0073] For example, said first heat exchange surface 20a may correspond to the inside of the sleeves 185 into which the second end of the heat pipe 10 is fitted.

[0074] Said cold thermal interface elements 18 enhance the heat exchange between the heat pipe 10 and the cold source 16 in question by their dedicated exchange surfaces, here the cold exchange surfaces 18a, 18b. In addition, the force F provided between the heat pipe 10 and the said cold thermal interface elements 18 promotes contact between them and therefore good thermal conduction.

[0075] More specifically, said rod 60 is configured to exert said force F on said heat pipes 10 so as to press said heat pipes 10 against said first cold exchange surface 18a of each of said cold thermal interface members 18.

[0076] According to the various embodiments illustrated, said heat pipes 10 are inclined so that, in use, a first zone ZI of the heat pipes 10 in heat exchange relationship with said hot thermal interface element 20 is vertically at a level lower than that of a second zone Z2 of the heat pipes 10 in heat exchange relationship with said cold thermal interface elements 18 ([Fig.3]).

[0077] Said connection box may include one or more electrical conduction busbars 50 intended to be electrically, or even thermally, connected to said hot source 12.

[0078] As described previously, said hot source 12 may include an electrical component 14. Said electrical component 14 may include an electrical protection component. For example, the electrical protection component includes an electrical relay and / or a fuse designed to open in the event of a fault in the circuit 3. Said hot source 12 may include electrical connection terminals 150, electrically connected to said electrical component 14 and in a heat exchange relationship with said dissipation device.

[0079] In the embodiment illustrated by the figures, said electrical connection terminals 150 are traversed by said rod 60. Advantageously, said electrical connection terminals 150 are fixed to said support 30, in particular by said fixing nut 608.

[0080] Preferably, the said busbar(s) 50 for electrical conduction are traversed by said rod 60. Advantageously, the said busbar(s) 50 for electrical conduction are fixed to said support 30, in particular by said fixing nut 608.

[0081] Thus, for example, the pin 609 of the rod 60 passes through said support 30. The bus bar(s) 50 of electrical conduction are taken partly sandwiched between the support 30 and said electrical connection terminals 150. Said support 30 is taken partly sandwiched between said elongated body 601 and the bus bar(s) 50 of electrical conduction.

[0082] Referring again to Figures 12 and 13, it can be seen that said support 30 comprises a first wing 32 in the shape of an inverted U comprising two lateral sides 34a and 34b. The lateral side 34a and the lateral side 34b may comprise a notch allowing passage of a heat pipe 10 respectively. An upper base 36 of said first wing 32 connects its lateral sides 34a, 34b.

[0083] Said second hot thermal interface element 20 is fixed to said support 30, for example to said upper base 36. Said electrical conduction busbar 50 and / or a first of the electrical connection terminals 150 are also fixed to said support 30, for example to said upper base 36.

[0084] Said busbar 50 is intended to be electrically, and possibly thermally, connected, on the one hand, to the first electrical connection terminal 150 of said electrical component 14 by one of its ends, and on the other hand, to the remainder of an electrical circuit of said connection box, in particular to another of its electrical components, not shown. Said first connection terminal 150 of the electrical component 14 is located, in particular, at one of the longitudinal ends of said electrical component 14, said electrical component 14 having here an external cylindrical shape.

[0085] Although not illustrated, said connection box is intended to include a second dissipation device identical to the previous one and connected to a second of the electrical connection terminals of said electrical member 14, said second electrical connection terminal being located at a longitudinal end of said electrical member 14, opposite to the longitudinal end provided with said first electrical connection terminal 150.

[0086] Said connection box here includes another support 30', advantageously symmetrical to the previous 30 with respect to a median plane of said hot source 12. Said other support 30 thus includes a second wing 32' in an inverted U is located at the level of said opposite longitudinal end of the electrical member 14. The second thermal interface member of the second heat dissipation device is fixed to said other support 30'.

[0087] In the illustrated embodiment, said first and second wings 32, 32' are integrated into a single frame, of which they form two opposite sides. Said frame defines a housing for said electrical element 14. Said frame includes a lower base 56 connecting the second wing 32' to the first wing 32. Said lower base 56 is parallel to and fixed to said cold source 16. Said electrical element 14 is at least partially located between said first and second wings 32, 32'.

Claims

Demands

1. A heat dissipation device, in particular for a motor vehicle, said device being configured for heat conduction 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 comprising a thermal interface component (20), said hot, configured to be in a heat exchange relationship with said hot source (12), and a plurality of thermal interface components (18), said cold, configured to be in a heat exchange relationship with said cold source (16) according to a spatial distribution spread over several distinct zones (RI, R2, ...), said device being further configured for heat exchange between said hot thermal interface component (12) and said cold thermal interface components (18).

2. Dissipation device according to claim 1 comprising thermal conduction pads (44) having electrical insulating properties.

3. Dissipation device according to the preceding claim in which said pads (44) are respectively intended to be located between one of said cold thermal interface members (18) and said cold source (16).

4. Dissipation device according to any one of the preceding claims wherein said hot thermal interface member (20) is substantially in the middle of said cold thermal interface members (18).

5. Dissipation device according to any one of the preceding claims comprising heat pipes (10) configured for heat exchange between, on the one hand, said hot thermal interface element (20) and, on the other hand, said cold thermal interface elements (18).

6. Dissipation device according to the preceding claim in which said hot and / or cold thermal interface members (18, 20) are configured to permit angular orientation of said heat pipes (10).

7. Dissipation device according to the preceding claim in which said hot and / or cold thermal interface members (18, 20) comprise a thermally bonded carrier part (180) to said hot or cold source (12, 16), and a contact piece (181), in ball joint connection with respect to said carrier piece (180), said corresponding heat pipe (10) being fixed to said contact piece (181).

8. Dissipation device according to any one of claims 5 to 7 wherein said hot thermal interface member (20) is configured to apply a force between said heat pipes (10) and said cold thermal interface members (18).

9. Dissipation device according to any one of claims 5 to 8 in which said heat pipes (10) are inclined so that, in use, a first zone of the heat pipes (10) in heat exchange relationship with said hot thermal interface element (20) is vertically at a level lower than that of a second zone of the heat pipes (10) in heat exchange relationship with said corresponding cold thermal interface element (18).

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

11. Electrical energy storage device, in particular accumulator battery, comprising a dissipation device according to any one of claims 1 to 9.

12. Vehicle comprising a dissipation device according to any one of claims 1 to 9.

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