Electric vehicle battery disconnect module, electric vehicle battery including a disconnect module and method for using an electric vehicle battery disconnect module

Abstract

Disconnect module (1) for electric vehicle battery comprising: a high-power electrical component (12) including a terminal (12.1, 12.2); an electrical connector (c2, c3) in electrical contact with the terminal (12.1, 12.2) of the high-power electrical component (12); a cooling circuit including a dielectric fluid; said cooling circuit including a heat exchanger (f, f2, f3), said heat exchanger including: a metallic body (60) in contact with the electrical connector; a conduit (61) connecting a dielectric fluid inlet port (62) and a dielectric fluid outlet port (63); FIGURE 8

Description

Title of the invention: Disconnect module for electric vehicle battery, electric vehicle battery comprising a disconnect module and method of using a disconnect module for electric vehicle battery

[0001] The invention relates to the field of batteries for electric vehicles. One aspect of the invention relates to a battery disconnect module for an electric vehicle comprising a cooling circuit. Another aspect of the invention relates to an electric vehicle battery comprising a battery disconnect module. The invention further relates to a method of using a battery disconnect module for an electric vehicle. Previous Art

[0002] Electrically powered vehicles include a battery that must supply the energy required for the operation of the drive motor. Furthermore, the battery of an electric vehicle must also power all other electrical devices present on board the vehicle.

[0003] Car manufacturers have developed batteries capable of handling very high electrical power, particularly during certain operating phases such as acceleration or fast charging.

[0004] During these operations, the electric currents at the terminals of an electric vehicle battery are on the order of several hundred amperes, and can even reach values ​​on the order of 500 A.

[0005] Connecting the battery to the traction system and the DC charging system requires the use of a high-power connection box.

[0006] To ensure the safety of electric vehicle users, the high-power connection box includes a battery disconnection module (or “battery disconnection unit” according to English terminology).

[0007] Battery disconnection modules are equipped with high-power electrical components which can, for safety reasons, cut the connection between the battery and the traction system and / or the DC charging system.

[0008] A battery disconnect module may, for example, include a fuse, a high-power relay, and a pyro-switch connected in series. The electrical connections are made using electrical conductors with very low resistance, for example, copper busbar conductors.

[0009] The electrical power used during traction or charging can generate heat in certain parts of the electrical components. Such heat can, for example, be localized at the terminals of the electrical components, particularly at the electrical connections. The surface current densities can be very high at these contact points, leading to a temperature increase.

[0010] When the temperature of electrical components exceeds certain limits, their operation is no longer guaranteed. For example, the operation of a high-power relay is only guaranteed for temperatures below 150 °C. When these temperature limits are exceeded, the high-power electrical components no longer function correctly, and it may become impossible to disconnect the battery, which poses significant risks to electric vehicle users.

[0011] Solutions for the thermal control of a battery pack have been proposed; see, for example, patent applications WO 2021 / 116297 and FR 3105601 filed by the applicant. However, these solutions are not suitable for the thermal control of the battery disconnect module, where highly localized heating can occur, particularly during certain operating phases.

[0012] For the same reasons, cooling the entire battery disconnect module housing would not be effective.

[0013] There is currently no solution for controlling the temperature of an electric vehicle battery disconnect module in order to prevent the failure of its high-power electrical components. Description of the invention

[0014] To at least partially resolve the technical problems mentioned above, one aspect of the invention relates to a disconnection module for an electric vehicle battery comprising: • a high-power electrical component including a terminal; • an electrical connector including a region in electrical contact with the terminal and fixed to said terminal by a means of fixing; • a cooling circuit comprising a dielectric fluid; said cooling circuit comprising a heat exchanger, said heat exchanger comprising: • a metallic body comprising a first face, said first face being in contact with the electrical connector; • a conduit extending inside the metallic body and connecting a dielectric fluid inlet orifice and a dielectric fluid outlet orifice; • a fixing hole, the fixing means being at least partially housed inside the fixing hole so as to hold the first face facing of the region of the electrical connector in electrical contact with the terminal.

[0015] A high-power electrical component is understood to be an electrical component or a combination of electrical components adapted to disconnect the battery when necessary.

[0016] A fastening means is defined as an element adapted to be housed in the mounting hole so as to lock the heat exchanger in place with respect to the electrical contact area between the electrical connector and one of the terminals of the electrical component. A fastening means may, for example, be a screw, a nail, a rivet, or a clip system.

[0017] The heat exchanger, also called a cooling element or “cooling dot” in English terminology, has a hollow metal body with a conduit allowing the circulation of the dielectric fluid, which is a cooling fluid. Thanks to its arrangement near the electrical contact between the conductive element and the terminal of the high-power electrical component, the heat exchanger is particularly effective at counteracting localized heating that can occur at these points. In other words, the battery disconnect module according to a first aspect of the invention allows for targeted cooling of the hottest points of the high-power electrical components.

[0018] Thanks to the cooling circuit of the battery disconnect module, the high-power electrical components can function correctly even under high current loads, for example during a fast charging phase.

[0019] Furthermore, the use of a dielectric heat transfer fluid eliminates any risk of short circuit that could be caused by the presence of an electrically conductive fluid. Moreover, the use of a battery disconnect module according to the first aspect of the invention does not require significant modifications to the battery power control unit and remains compatible with existing devices.

[0020] In addition to the characteristics mentioned in the preceding paragraphs, the battery disconnect module according to one aspect of the invention may also have one or more additional characteristics from among the following, considered individually or according to all technically possible combinations:

[0021] - in the disconnection module: • the terminal of the high-power electrical component includes a housing adapted to accommodate at least partially the fastening means; • the region of the electrical connector in electrical contact with the terminal includes an opening positioned opposite the housing; • the metallic body includes a second face opposite the first face; • the fastening means comprises a head and a body, the head being abutted against the second face of the metal body and the body being partially housed inside the fastening hole, the opening and the housing; - The cooling system includes: • a supply conduit for the dielectric fluid, said supply conduit being in fluidic connection with the inlet port (62) of a heat exchanger; • an outlet conduit for the dielectric fluid, said outlet conduit being in fluidic connection with the outlet port (63) of a heat exchanger; the fluid inlet conduit and the fluid outlet conduit being made of dielectric material; - the high power electrical component is chosen from a group including: high power relay, pyro-switch, fuse and a combination of these components; - The high-power electrical component comprises a pyro-switch, a high-power relay, and a fuse, said pyro-switch, high-power relay, and fuse being connected in series by two busbar-type electrical connectors, the high-power electrical component comprising six terminals, the cooling circuit comprising: • six heat exchangers, each heat exchanger being associated with a terminal of the high-power electrical component; • five ducts, each duct forming a fluidic connection between two heat exchangers so as to connect the six heat exchangers in series; - the disconnection module includes at least two heat exchangers, the two heat exchangers being connected by a series or parallel fluidic connection; - the cooling circuit is a closed circuit comprising a pump and a reservoir of dielectric fluid; - the cooling circuit is configured to be connected to a cooling circuit of the electric vehicle; - the heat exchanger has a metallic body in the shape of a parallelepiped or a cylinder; - the inlet port of the dielectric fluid includes an inlet nozzle and the outlet port of the dielectric fluid includes an outlet nozzle, the inlet nozzle and the outlet nozzle being parallel or perpendicular.

[0022] A second aspect of the invention relates to a battery comprising a disconnection module according to the first aspect of the invention.

[0023] According to one embodiment, the battery according to one aspect of the invention comprises:

[0024] - a battery box comprising a floor;

[0025] - a battery disconnect module according to the first aspect of the invention and including a reservoir of dielectric fluid, said reservoir being in thermal contact with the floor.

[0026] Because the base of the housing has a lower temperature than the high-power electrical components of the disconnect module, the fluid reservoir can easily exchange heat with the base, cooling the dielectric fluid. In one embodiment, the base is made of extruded material. The passage of air within the base then makes the heat exchange between the fluid and the base more efficient.

[0027] Another aspect of the invention relates to a motor vehicle comprising a battery according to the second aspect of the invention.

[0028] The invention further relates to a method for cooling a disconnect module for an electric vehicle battery according to the first aspect of the invention, said method comprising the following steps: • determine a level of thermal or electrical stress on the battery disconnect module according to one aspect of the invention; • Based on the determined level of thermal or electrical stress, activate the circulation of dielectric fluid in the cooling circuit.

[0029] The method according to one aspect of the invention makes it possible to trigger the cooling circuit only when necessary, namely in the event of high thermal or electrical stress.

[0030] The level of thermal or electrical stress on the disconnection module can, for example, be determined using a temperature or electrical current sensor. In this case, it is possible to compare the measured values ​​to pre-established threshold values ​​or theoretical curves, thus defining a stress level.

[0031] Alternatively, the level of stress can be defined according to the battery's operating phase. For example, a fast charging phase can automatically be considered as resulting in a high or very high level of stress.

[0032] If the stress level exceeds a certain predetermined threshold, fluid circulation is activated to locally cool the high-power components. The method according to one aspect of the invention thus allows for targeted and on-demand cooling of the hottest points. Figures

[0033] Other advantages and features of the invention will become apparent from the following description, illustrated by the figures in which:

[0034] - Figure 1 illustrates a three-dimensional view of an embodiment of a part of a disconnection module according to one aspect of the invention;

[0035] - Figure [Fig. 2] illustrates an exploded view of an embodiment of a part of a disconnection module according to one aspect of the invention;

[0036] - Figure 3 illustrates a three-dimensional view of an embodiment of a part of a disconnection module according to one aspect of the invention, the illustrated part comprising the electrical connectors;

[0037] - Figure 4 illustrates an exploded view of the heat exchangers and the means of fixings of an embodiment of a disconnection module according to one aspect of the invention;

[0038] - Figure 5 illustrates a three-dimensional view of an embodiment of a part of a disconnection module according to one aspect of the invention, the illustrated part comprising heat exchangers;

[0039] - Figure 6 illustrates a cross-sectional view of a heat exchanger according to a mode of realization of the first aspect of the invention;

[0040] - Figure 7 illustrates a three-dimensional view of one embodiment of a module disconnection according to one aspect of the invention;

[0041] - Figure 8 illustrates a three-dimensional view of another embodiment of a disconnection module according to one aspect of the invention;

[0042] - Figure 8bis illustrates a schematic view of a disconnection module according to a aspect of the invention;

[0043] - Figure 9 illustrates a cross-sectional view of the device according to the embodiment illustrated in [Fig.8];

[0044] - Figure 10 illustrates a cross-sectional view of another embodiment of a heat exchanger thermal;

[0045] - Figure 11 illustrates a three-dimensional view of another embodiment of a heat exchanger;

[0046] - Figure 12 schematically illustrates the steps of one embodiment of the method for cooling a battery disconnect module according to one aspect of the invention.

[0047] In the figures, identical elements are identified by identical reference numerals. For the sake of readability, the size scales between represented elements are not respected. Definitions

[0048] A disconnect module is defined as a high-power electrical module connected to a battery terminal and capable of disconnecting the battery from the electrical circuit to which the battery is connected. For example, the disconnect module may be connected to a battery terminal and to the drive motor or the circuit DC charging.

[0049] A heat exchanger or cooling element or “cooling dot” according to English terminology means a part of the cooling circuit adapted to carry out a heat exchange between the cooling fluid and an element to be cooled such as an electrical connection terminal of a high power electrical component.

[0050] A fluidic connection is defined as a connection allowing the passage of the cooling fluid. A fluidic connection is, for example, made using an element such as a conduit or a pipe.

[0051] A cooling fluid or heat transfer fluid is understood to be a fluid capable of exchanging heat with elements of a cooling circuit.

[0052] A closed cooling circuit is understood to be a fluidic circuit that does not exchange cooling fluid with other fluidic circuits of the electric vehicle.

[0053] An external electrical circuit is defined as an electrical circuit to which the disconnection module is connected. The external electrical circuit may, for example, include the battery terminals, the DC charging circuit, or the electric motor traction circuit. Detailed description of the invention

[0054] Examples of embodiments of a battery disconnect module for electric vehicles according to one aspect of the invention are described in detail below, with reference to the accompanying drawings. These examples illustrate the features and advantages of the invention. It should be noted, however, that the invention is not limited to these examples.

[0055] Figure 1 illustrates an embodiment of part of a battery disconnect module 1 for an electric vehicle. The module 1 as illustrated in Figure 1 comprises a support 10. The support 10 is made using an electrically insulating material, for example, a thermoplastic polymer such as ABS, PA6-GF30, or PP-GF30. The support 10 may also comprise bio-based materials.

[0056] The support 10, as illustrated in [Fig. 1], includes housings adapted to accommodate one or more high-power electrical components. In the example illustrated in [Fig. 1], the module 1 includes a pyro-switch 11, a high-power relay 12, and a fuse 13. These elements allow the battery to be disconnected when necessary. Each of these elements includes two electrical connection terminals. The pyro-switch 11 includes a first 11.1 and a second 11.2 electrical connection terminal. The high-power relay 12 includes a first 12.1 and a second 12.2 electrical connection terminal. The fuse 13 includes a first 13.1 and a second 13.2 electrical connection terminal.

[0057] Fig. 2 shows an exploded view of the disconnection module 1 illustrated in Fig. 1. and electrical connection elements. According to the embodiment illustrated in [Fig.2], module 1 comprises a first electrical connector c1, a second electrical connector c2, a third electrical connector c3 and a fourth electrical connector c4. In the embodiment illustrated in [Fig.2], the electrical connectors are of the busbar type.

[0058] The first electrical connector cl comprises a first opening cl.1 and a second opening cl.2. The second opening cl.2 of the first electrical connector cl is positioned opposite the first terminal 11.1 of the electrical connection of the pyro-switch 11.

[0059] The second electrical connector c2 comprises a first opening c2.1 and a second opening c2.2. The first opening c2.1 of the second electrical connector c2 is positioned opposite the second electrical connection terminal 11.2 of the pyro-switch 11.2. The second opening c2.2 of the second electrical connector c2 is positioned opposite the first electrical connection terminal 12.1 of the high-power relay 12.

[0060] The third electrical connector c3 comprises a first opening c3.1 and a second opening c3.2. The first opening c3.1 of the third electrical connector c3 is positioned opposite the second electrical connection terminal 12.2 of the high-power relay 12. The second opening c3.2 of the third electrical connector c3 is positioned opposite the first electrical connection terminal 13.1 of the fuse 13.

[0061] The fourth electrical connector c4 comprises a first opening c4.1 and a second opening c4.2. The first opening c4.1 of the fourth electrical connector c4 is positioned opposite the second electrical connection terminal 13.2 of the fuse 13.

[0062] Figure 3 illustrates the battery disconnect module as shown in Figure 2, after connecting electrical connectors c1, c2, c3, and c4. The pyro-switch 11, the high-power relay 12, and the fuse 13 are then connected in series. The first opening c1 of the first electrical connector c1 and the second opening c4.2 of the fourth electrical connector c4 allow the disconnect module 1 to be connected to other components of the electric vehicle. For example, one of these openings can be connected to a battery terminal while the other can be connected to the traction system or the DC charging system.

[0063] Figure 4 illustrates an exploded view of the device shown in Figure 3 and part of the cooling circuit. The cooling circuit as shown in Figure 4 comprises a first heat exchanger fl, a second heat exchanger f2, a third heat exchanger f3, and a fourth heat exchanger f4, a fifth heat exchanger f5 and a sixth heat exchanger f6. Each heat exchanger is associated with one of the electrical connection terminals.

[0064] Each heat exchanger comprises a metallic body having a first face facing an electrical connector and a second face opposite the first face. In addition, each heat exchanger includes a mounting hole adapted to receive at least partially one of the mounting means ml, m2, m3, m4, m5 and m6. Only the mounting holes f3.1 of the mounting element f3 and f4.1 of the mounting element f4 are referenced in [Fig. 4].

[0065] Figure 5 illustrates the device of Figure 4 in the assembled state. The fastening element ml is partially housed in the mounting hole of the first heat exchanger fl, in the second opening c 1.2 of the first electrical conductor cl, and in the first electrical connection terminal 11.1 of the pyro-switch 11. This arrangement allows both the first electrical conductor cl to be fixed to the first connection terminal 11.1 of the pyro-switch and the heat exchanger fl to be fixed to the first electrical connector cl. In other words, this arrangement allows the first face of the heat exchanger fl, opposite the portion of the electrical connector cl, to be kept in electrical contact with the first connection terminal 11.1 of the pyro-switch 11. Similarly, the fastening elements m2, m3, m4, m5, and m6 are associated with the heat exchangers f2, f3, f4, f5, and f6, respectively.

[0066] In the example illustrated in Figures 4 and 5, the fastening means are such as screws, nails, or rivets. Each fastening means comprises a body m3.1 and a head m3.2. These elements are referenced only in relation to the first fastening means ml. The body ml.1 of the fastening means is positioned so as to be at least partially inside the fastening hole, the opening of the first electrical connector cl, and the first terminal 11.1 of the pyro-switch 11. This ensures that the opening cl.1 is aligned with the first connection terminal 11.1 and the fastening hole of the first heat exchanger fl is aligned with the opening of the first electrical connector. Furthermore, the head ml.1 abuts against the second face of the metal body of the first heat exchanger fl so as to ensure thermal contact between the second face of the metal body of fl and the electrical connector cl.The same arrangement is used for all other heat exchangers f2, f3, f4, f5 and f6.

[0067] This arrangement makes it possible to obtain both good electrical contact between the electrical connectors and the connection terminals of the high power electrical components and good thermal contact between the metal bodies of the heat exchangers and the electrical connectors.

[0068] According to another embodiment, the fastening means can be clipping systems.

[0069] Figure 6 illustrates a cross-sectional view of a heat exchanger f (or “cooling dot” according to English terminology). The heat exchanger f comprises a hollow metal body 60, extending between a first face and a second face (not referenced in Figure 6), the first face being in contact with an electrical connector. The metal body 60 further comprises a conduit extending between an inlet port 62 and an outlet port 63. The conduit 61 is adapted to circulate a dielectric cooling fluid which cools objects in contact with the heat exchanger f, and in particular an electrical connector and a terminal of a high-power electrical component.

[0070] As illustrated in [Fig.6], the metal body 60 further includes a fixing hole 64 extending between the first and second face and configured to accommodate at least partially a fixing means, so as to position the heat exchanger in contact with an electrical connector, the fixing hole being opposite an electrical connection terminal of a high-power electrical component.

[0071] The heat exchanger f comprises, according to the embodiment illustrated in [Fig.6], an inlet nozzle 64 extending from the inlet port 62 and an outlet nozzle 65 extending from the outlet port 63. The two nozzles 64 and 65 allow easy connection of the heat exchanger f to the cooling circuit circulating the dielectric cooling fluid.

[0072] Figure 7 illustrates an embodiment of a battery disconnect module 1 for an electric vehicle according to one aspect of the invention. Some of the elements already described are not referenced in Figure 7.

[0073] As illustrated in [Fig.7], the battery disconnection module 1 comprises a first conduit tl connecting the first heat exchanger fl and the second heat exchanger f2, a second conduit t2 connecting the second heat exchanger f2 and the third heat exchanger f3, a third conduit t3 connecting the third heat exchanger f3 and the fourth heat exchanger f4 and a fifth conduit t5 connecting the fifth heat exchanger f5 and the sixth heat exchanger f6.

[0074] The conduits t1, t2, t3, t4, and t5 then form a cooling circuit connecting the various heat exchangers fl, f2, f3, f4, f5, and f6, allowing the circulation of the cooling fluid. It is important to note that the conduits must be made of electrically insulating material to prevent short circuits between the various high-power electrical components. As illustrated in [Fig. 7], the cooling circuit of module 1 is configured to be connected to an external cooling circuit using connecting pipes 6 and 7. In this case, module 1 may also include a solenoid valve to circulate the cooling fluid in the fluidic circuit on demand.

[0075] Fastening elements 71, 72, 73, 74, 75, 76, 77, 78, 79 and 80 secure the ends of each conduit to the inlet or outlet nozzles of the heat exchangers. The fastening elements are, for example, hose clamps screwed around the conduits t1, t2, t3, t4 and t5.

[0076] Figure 8 illustrates a second embodiment of the battery disconnect module 1 according to one aspect of the invention. Some of the elements already described are not referenced in Figure 8.

[0077] The disconnection module 1, as illustrated in [Fig. 8], comprises a pump 83 and a coolant reservoir 82. The pump is connected to a heat exchanger by a pump outlet pipe 84. The pump is connected to the reservoir 82 by a pipe 85. A reservoir pipe 81 connects a heat exchanger to the reservoir 82, thus closing the cooling circuit. According to the embodiment illustrated in [Fig. 8], the cooling circuit is a closed circuit, namely a self-contained fluid circuit disconnected from the other cooling systems of the electric vehicle.

[0078] According to the embodiment illustrated in [Fig. 8], the reservoir is positioned on a battery floor 800 made of extruded material. This allows for efficient cooling of the coolant contained in the reservoir 82. Alternatively, the floor 800 can be cooled. A thermal contact element 86 can be disposed between the reservoir 82 and the battery floor 800. The thermal contact element can, for example, be a layer of thermal paste.

[0079] Figure 8bis schematically illustrates an embodiment of a disconnection module according to one aspect of the invention. As illustrated in Figure 8bis, the disconnection module comprises heat exchangers fl and f6 connected by pipe t1. A pump 83 circulates the cooling fluid in the circuit. Arrow FL indicates the direction of fluid flow. Pump 83 is connected to heat exchanger f6 by conduit 84. Pump 83 is further connected to reservoir 82 by pipe 85. Conduit 81 closes the cooling circuit by connecting heat exchanger fl and reservoir 82.

[0080] Fig. 9 illustrates a cross-sectional view of the battery disconnection module according to the embodiment illustrated in Fig. 8, the cross-sectional plane passing through the reservoir 82. Fig. 9 illustrates in particular the positioning of the thermal contact element 86 between the reservoir 82 and the extruded battery floor 800.

[0081] Figure 10 illustrates a cross-sectional view of another embodiment of a heat exchanger 60.1, the cross-sectional plane passing through the metal body of the heat exchanger. In this case, the metal body has a cylindrical shape.

[0082] In the example illustrated in [Fig. 6], the inlet nozzles 64 and outlet nozzles 65 of cooling fluid are parallel and positioned on the same side of the metal body of the heat exchanger. Alternatively, the inlet nozzles 64 and outlet nozzles 65 of the dielectric fluid can be positioned on either side of the metal body, as illustrated in [Fig. 10].

[0083] Figure 11 illustrates another example of the embodiment of a heat exchanger 60.2, in which the inlet nozzles 64 and outlet nozzles 65 of the cooling fluid are perpendicular. In general, the nozzles can be arranged to form any angle between them, according to the requirements of the fluid connections.

[0084] Figure 12 schematically illustrates the steps of the process 100 of using a Disconnect module for electric vehicle battery according to another aspect of the invention. As illustrated in [Fig.12], the method 100 includes a step of determining 101 the level of electrical or thermal stress on the disconnect module 1.

[0085] According to one embodiment, step 101 includes measuring a parameter such as temperature or current density near the connection terminals of the high-power electrical elements. If the measured values ​​exceed predetermined thresholds, the stress level is considered high and cooling becomes necessary.

[0086] According to another embodiment, step 101 includes determining the battery operating phase. In this case, it is considered that certain operating phases involving high stress on the battery disconnect module require cooling.

[0087] The method 100 further includes a step 101 of activating the cooling circuit of the battery disconnect module 1. Activation is triggered if a high stress level has been determined during step 101.

[0088] According to one embodiment, the activation of the circulation of the cooling fluid may include the opening of a solenoid valve or the starting of the pump 83.

Claims

Demands

1. Disconnect module (1) for electric vehicle battery comprising: • a high power electrical component (12) including a terminal (12.1, 12.2); • an electrical connector (c2, c3) including a region in electrical contact with the terminal (12.1, 12.2) and fixed to said terminal by a fastening means (m3, m4, 65); • a cooling circuit including a dielectric fluid said cooling circuit including a heat exchanger (f, f2, f3), said heat exchanger including: - a metal body (60) including a first face, said first face being in contact with the electrical connector (c2, c3); - a conduit (61) extending inside the metal body (60) and connecting an inlet port (62) of the dielectric fluid and an outlet port (63) of the dielectric fluid; - a fastening hole (f3.1, f4.1, 64), the fastening means (m3, m4, 65) being at least partially housed inside the fastening hole (f3.1, f4.1, 64) so ​​as to keep the first face opposite the region of the electrical connector in electrical contact with the terminal (12.1, 12.2).

2. Disconnect module (1) for electric vehicle battery according to the preceding claim, wherein: • the terminal (12.1, 12.2) of the high-power electrical component (12) comprises a housing adapted to accommodate at least partially the fastening means (m3, m4, 65); • the region of the electrical connector (c2, c3) in electrical contact with the terminal (12.1, 12.2) comprises an opening (c2.2, c3.1) positioned opposite the housing; • the metal body (60) comprises a second face opposite the first face; • the fastening means (m3, m4, 65) comprises a head (m3.1) and a body (m3.2), the head (m3.1) being abutted against the second face of the metal body and the body (m3.2) being partially housed inside the fixing hole (f3.1, f4.1, 64), the opening (c2.2, c3.1) and the housing.

3. Disconnection module (1) for electric vehicle battery according to any one of the preceding claims in which the cooling circuit comprises: • a dielectric fluid inlet conduit, said inlet conduit being in fluidic connection with the inlet port (62) of a heat exchanger; • a dielectric fluid outlet conduit, said outlet conduit being in fluidic connection with the outlet port (63) of a heat exchanger; the fluid inlet conduit and the fluid outlet conduit being made of dielectric material.

4. Disconnection module (1) for electric vehicle battery according to any one of the preceding claims wherein the high power electrical component is selected from a group comprising: high power relay (12), pyro-switch (11), fuse (13).

5. Disconnection module (1) for electric vehicle battery according to any one of claims 1 to 3 wherein the high power electrical component comprises a pyro-switch (11), a high power relay (12) and a fuse (13), said pyro-switch (11), high power relay (12) and fuse (13) being connected in series by two busbar type electrical connectors (c2, c3), the high power electrical component comprising six terminals (11.1, 11.2, 12.1, 12.2, 13.1, 13.2), the cooling circuit comprising: • six heat exchangers (fl, f2, f3, f4, f5, f6), each heat exchanger being associated with a terminal (11.1, 11.2, 12.1, 12.2, 13.1, 13.2) of the high power electrical component; • five conduits (t1, t2, t3, t4, t5), each conduit forming a fluidic connection between two heat exchangers so as to connect in series the six heat exchangers (fl, f2, f3, f4, f5, f6).

6. Disconnection module (1) for electric vehicle battery according to any one of claims 1 to 4 comprising at least two heat exchangers, the two heat exchangers being connected by a series or parallel fluidic connection.

7. Disconnect module (1) for electric vehicle battery according to any one of the preceding claims wherein the cooling circuit is a closed circuit comprising a pump (83) and a reservoir (82) of dielectric fluid.

8. Disconnect module (1) for electric vehicle battery according to any one of claims 1 to 6 wherein the cooling circuit is configured to be connected to an electric vehicle cooling circuit.

9. Disconnect module (1) for electric vehicle battery according to any one of the preceding claims wherein the heat exchanger (60, 60.1, 60.2) has a metallic body in the shape of a parallelepiped or cylinder.

10. Disconnect module (1) for electric vehicle battery according to any one of the preceding claims wherein the inlet port (62) of the dielectric fluid comprises an inlet nozzle (64) and the outlet port (63) of the dielectric fluid comprises an outlet nozzle (65), the inlet nozzle (64) and the outlet nozzle (65) being parallel or perpendicular.

11. Electric vehicle battery comprising a battery disconnect module (1) according to any one of claims 1 to 10.

12. Electric vehicle battery according to the preceding claim, said battery comprising: • A battery housing including a floor (800); • A battery disconnect module according to claim 7, the dielectric fluid reservoir (82) being in thermal contact with the floor (800).

13. Electric vehicle comprising a battery according to claim 11 or claim 12.

14. Method (100) of cooling a disconnect module for electric vehicle battery according to any one of claims 1 to 10, said method comprising the following steps: • Determine (101) a level of thermal or electrical stress on the disconnect module for electric vehicle battery according to any one of claims 1 to 10; • Based on the determined level of thermal or electrical stress, activate (102) the circulation of dielectric fluid in the cooling circuit.

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