Disconnect module for electric vehicle battery, battery for electric vehicle comprising a disconnect module and method of using a disconnect module for electric vehicle battery

Abstract

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

Description

Title of the invention: Disconnection module for an electric vehicle battery, battery for an electric vehicle comprising a disconnection module and method of using a disconnection module for an electric vehicle battery

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

[0002] Electrically powered vehicles include a battery that must provide the energy necessary 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 rapid recharging.

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

[0005] Connecting the battery to the traction system and the direct current 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 deconnection unit” in English terminology).

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

[0008] A battery disconnect module may, for example, comprise a fuse, a high-power relay, and a pyro-switch connected in series. The electrical connections are made using electrical conductors having very low resistance, for example copper electrical conductors of the bus bar type or “bus bars” according to English terminology.

[0009] The electrical powers used in the traction or recharging phase can generate heating of certain parts of the electrical components. Such heating can for example be located at the terminals of the electrical components, in particular at the locations of the electrical connections. The surface densities of electric current can be very high at these contact points, leading to an increase in temperature.

[0010] When the temperature of the 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 cut off the battery, which poses significant risks for users of electric vehicles.

[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 disconnection module where very localized heating can take place, in particular 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 a disconnect module for an electric vehicle battery so as 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 comprising a terminal; • an electrical connector comprising a region in electrical contact with the terminal and fixed to said terminal by a fixing means; • a cooling circuit comprising a dielectric fluid; said cooling circuit comprising a heat exchanger, said heat exchanger comprising: • a metal body comprising a first face, said first face being in contact with the electrical connector; • a conduit extending inside the metal body and connecting a dielectric fluid inlet port and a dielectric fluid outlet port; • a fixing hole, the fixing means being at least partially housed inside the fixing hole so as to hold the first face facing from the region of the electrical connector in electrical contact with the terminal.

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

[0016] By fixing means is meant an element adapted to be housed in the fixing hole so as to block the heat exchanger opposite the electrical contact region between the electrical connector and one of the terminals of the electrical component. A fixing means may for example be a screw, a nail, a rivet or a clipping system.

[0017] The heat exchanger, also called a cooling element or “cooling dot” according to 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 close to the electrical contact between the conductive element and the terminal of the high-power electrical component, the heat exchanger is particularly effective in countering localized heating which can occur at these locations. In other words, the battery disconnect module according to a first aspect of the invention allows 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 makes it possible to avoid any risk of short circuit which could be caused by the presence of an electrically conductive fluid. Furthermore, the use of a battery disconnection module according to the first aspect of the invention does not require significant modifications to the battery power control box and it remains compatible with existing devices.

[0020] In addition to the characteristics which have just been mentioned in the preceding paragraphs, the battery disconnection module according to one aspect of the invention may also have one or more additional characteristics 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 comprises a housing adapted to accommodate at least partially the fixing means; • the region of the electrical connector in electrical contact with the terminal comprises an opening positioned opposite the housing; • the metal body comprises a second face opposite the first face; • the fixing means comprises a head and a body, the head abutting the second face of the metal body and the body being partially housed inside the fixing hole, the opening and the housing; - the cooling circuit includes: • an inlet conduit for the dielectric fluid, said inlet conduit being in fluid connection with the inlet orifice (62) of a heat exchanger; • an outlet conduit for the dielectric fluid, said outlet conduit being in fluid connection with the outlet orifice (63) of a heat exchanger; the fluid inlet pipe and the fluid outlet pipe being made of dielectric material; - the high-power electrical component is chosen from a group comprising: 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 bus bar 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 conduits, each conduit forming a fluid connection between two heat exchangers so as to connect the six heat exchangers in series; - the disconnection module comprises at least two heat exchangers, the two heat exchangers being connected by a series or parallel fluid 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 metal body in the shape of a parallelepiped or cylinder; - the inlet port of the dielectric fluid comprises an inlet nozzle and the outlet port of the dielectric fluid comprises 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 disconnection module according to the first aspect of the invention and comprising a reservoir of dielectric fluid, said reservoir being in thermal contact with the floor.

[0026] Due to the fact that the floor of the housing has a lower temperature than the high-power electrical components of the disconnection module, the fluid reservoir can easily exchange heat with the floor, by cooling the dielectric fluid. According to one embodiment, the floor is made of extruded material. The passage of air inside the floor then makes the heat exchanges between the fluid and the floor 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 of cooling a disconnection 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 ​​with pre-established threshold values ​​or theoretical curves, thereby defining a stress level.

[0031] Alternatively, the demand level may be defined based on the operating phase of the battery. For example, a fast charging phase may be automatically considered to result in a high or very high demand level.

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

[0033] Other advantages and characteristics of the invention will appear on reading the following description, illustrated by the figures in which:

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

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

[0036] - [Fig.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] - [Fig.4] illustrates an exploded view of the heat exchangers and the means of fasteners of an embodiment of a disconnection module according to one aspect of the invention;

[0038] - [Fig.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] - [Fig.6] illustrates a sectional view of a heat exchanger according to a method of embodiment of the first aspect of the invention;

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

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

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

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

[0044] - [Fig. 10] illustrates a sectional view of another embodiment of an exchanger thermal;

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

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

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

[0048] A disconnect module is understood to mean a high-power electrical module connected to a terminal of the battery 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 terminal of the battery and to the drive motor or circuit direct current 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 fluid connection is understood to mean a connection allowing the passage of the cooling fluid. A fluid connection is for example made using an element such as a conduit or a pipe.

[0051] Cooling fluid or heat transfer fluid means a fluid capable of exchanging heat with elements of a cooling circuit.

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

[0053] An external electrical circuit is understood to mean an electrical circuit to which the disconnection module is connected. The external electrical circuit may, for example, comprise the battery terminals, the direct current charging circuit or the traction circuit of the electric motor. Detailed description of the invention

[0054] Exemplary embodiments of a battery disconnection module for an electric vehicle according to one aspect of the invention are described in detail below, with reference to the accompanying drawings. These examples illustrate the characteristics and advantages of the invention. It is however recalled that the invention is not limited to these examples.

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

[0056] The support 10, as illustrated in [Fig.l], comprises housings adapted to accommodate one or more high-power electrical components. In the example illustrated in [Fig.l], the module 1 comprises a pyro-switch 11, a high-power relay 12 and a fuse 13. These elements make it possible to disconnect the battery if necessary. Each of these elements comprises two electrical connection terminals. The pyro-switch 11 comprises a first 11.1 and a second 11.2 electrical connection terminal. The high-power relay 12 comprises a first 12.1 and a second 12.2 electrical connection terminal. The fuse 13 comprises 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.l] and electrical connection elements. According to the embodiment illustrated in [Fig.2], the module 1 comprises a first electrical connector cl, 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 bus bar type or “bus bars” according to English terminology.

[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 electrical connection terminal 11.1 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] [Fig.3] illustrates the battery disconnect module according to the example of [Fig.2], after connecting the electrical connectors cl, 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 cl.l of the first electrical connector cl and the second opening c4.2 of the fourth electrical connector c4 allow the disconnect module 1 to be connected to the other components of the electric vehicle. For example, one of these openings can be connected to a terminal of the battery while the other can be connected to the traction system or the direct current charging system.

[0063] [Fig.4] illustrates an exploded view of the device illustrated in [Fig.3] and a portion of the cooling circuit. The cooling circuit as shown in [Fig.4] comprises a first heat exchanger f1, a second heat exchanger f2, a third heat exchanger f3, 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 metal body comprising a first face facing an electrical connector and a second face opposite the first face. In addition, each heat exchanger comprises a fixing hole adapted to receive at least partially one of the fixing means ml, m2, m3, m4, m5 and m6. Only the fixing holes f3.1 of the fixing element f3 and f4.1 of the fixing element f4 are referenced in [Fig.4].

[0065] [Fig. 5] illustrates the device of [Fig. 4] in the assembled state. The fixing element ml is partially housed in the fixing 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 makes it possible both to fix the first electrical conductor cl to the first connection terminal 11.1 of the pyro-switch and to fix the heat exchanger fl to the first electrical connector cl. In other words, this arrangement makes it possible to maintain the first face of the heat exchanger fl opposite the portion of the electrical connector cl in electrical contact with the first connection terminal 11.1 of the pyro-switch 11. Similarly, the fixing 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 means 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.l 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 makes it possible to maintain the opening cl. 1 opposite the first connection terminal 11.1 and the fastening hole of the first heat exchanger fl opposite the opening of the first electrical connector. Furthermore, the head ml.l 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 fixing means may be clipping systems.

[0069] [Fig. 6] illustrates a 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 [Fig. 6]), the first face being in contact with an electrical connector. The metal body 60 further comprises a conduit extending between an inlet orifice 62 and an outlet orifice 63. The conduit 61 is adapted to make a circular dielectric cooling fluid which makes it possible to cool the 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 comprises a fixing hole 64 extending between the first and second faces and configured to at least partially accommodate 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 orifice 62 and an outlet nozzle 65 extending from the outlet orifice 63. The two nozzles 64 and 65 make it possible to easily connect the heat exchanger f to the cooling circuit circulating the dielectric cooling fluid.

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

[0073] As illustrated in [Fig.7], the battery disconnect module 1 comprises a first conduit t1 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 different heat exchangers fl, f2, f3, f4, f5, f6 and allowing the circulation of the cooling fluid. It is important to note that the conduits must be made of electrically insulating material to avoid short circuits between the different high-power electrical components. As illustrated in [Fig.7], the cooling circuit of the module 1 is configured to be connected to an external cooling circuit using the connection pipes 6 and 7. In this case, the module 1 may also include a solenoid valve to circulate the cooling fluid in the fluid circuit on demand.

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

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

[0077] The disconnection module 1 as illustrated in [Fig.8] comprises a pump 83 and a reservoir 82 of coolant. 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 so as to close the cooling circuit. According to the embodiment illustrated in [Fig.8] the cooling circuit is a closed circuit, namely an autonomous 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 makes it possible to efficiently cool the cooling fluid contained in the reservoir 82. Alternatively, the floor 800 can be cooled. A thermal contact element 86 can be arranged between the reservoir 82 and the battery floor 800. The thermal contact element can, for example, be a layer of thermal paste.

[0079] [Fig.8bis] schematically illustrates an embodiment of a disconnection module according to one aspect of the invention. As illustrated in [Fig.8bis], the disconnection module comprises the heat exchangers f1 and f6 connected by the pipe t1. A pump 83 allows the circulation of the cooling fluid in the circuit. The arrow FL indicates the direction of circulation of the fluid. The pump 83 is connected to the heat exchanger f6 by the conduit 84. The pump 83 is further connected to the reservoir 82 by the pipe 85. The conduit 81 closes the cooling circuit by connecting the heat exchanger f1 and the reservoir 82.

[0080] [Fig.9] illustrates a sectional view of the battery disconnect module according to the embodiment illustrated in [Fig.8], the 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] [Fig.10] illustrates a sectional view of another embodiment of a heat exchanger 60.1, the 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 cooling fluid inlet 64 and outlet 65 nozzles 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] [Fig. 11] illustrates another example of embodiment of a heat exchanger 60.2, wherein the inlet 64 and outlet 65 nozzles of the cooling fluid are perpendicular. In general, the nozzles can be arranged to form any angle between them, depending on the requirements of the fluid connections.

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

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

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

[0087] The method 100 further comprises a step 101 of activating the cooling circuit of the battery disconnection module 1. The activation is triggered if a high demand level has been determined during step 101.

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

Claims

Claims

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

2. Disconnection module (1) for an electric vehicle battery according to the preceding claim, in which: • the terminal (12.1, 12.2) of the high-power electrical component (12) comprises a housing adapted to at least partially accommodate the fixing 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 fixing means (m3, m4, 65) comprises a head (m3.1) and a body (m3.2), the head (m3.1) abutting 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 an electric vehicle battery according to one of the preceding claims, in which the cooling circuit comprises: • an inlet conduit for the dielectric fluid, said inlet conduit being in fluid connection with the inlet orifice (62) of a heat exchanger; • an outlet conduit for the dielectric fluid, said outlet conduit being in fluid connection with the outlet orifice (63) of a heat exchanger; the fluid inlet conduit and the fluid outlet conduit being made of dielectric material.

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

5. Disconnection module (1) for an electric vehicle battery according to 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 bus bar 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 (tl, t2, t3, t4, t5), each conduit forming a fluid 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 an electric vehicle battery according to one of claims 1 to 4 comprising at least two heat exchangers, the two heat exchangers being connected by a series or parallel fluid connection.

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

8. Disconnection module (1) for an electric vehicle battery according to one of claims 1 to 6 in which the cooling circuit is configured to be connected to a cooling circuit of the electric vehicle.

9. Disconnection module (1) for an electric vehicle battery according to one of the preceding claims, in which the heat exchanger (60, 60.1, 60.2) has a metal body in the shape of a parallelepiped or cylinder.

10. Disconnection module (1) for an electric vehicle battery according to one of the preceding claims, in which the inlet orifice (62) of the dielectric fluid comprises an inlet nozzle (64) and the outlet orifice (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 one of claims 1 to 10.

12. Electric vehicle battery according to the preceding claim, said battery comprising: • A battery housing comprising 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. An electric vehicle comprising a battery according to claim 11 or claim 12.

14. Method (100) of cooling a disconnection module for electric vehicle battery according to one of claims 1 to 10, said method comprising the following steps: • Determine (101) a level of thermal or electrical stress on the disconnection module for an electric vehicle battery according to 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.

Images