Thermal regulation device

Abstract

Title: Thermal regulation device The invention relates to a thermal regulation device (1) for cooling at least one energy storage component (5), this energy storage component being susceptible to thermal runaway, this energy storage component being in particular a battery cell, the thermal regulation device (1) comprising: a heat transfer fluid circuit (10), in particular a dielectric fluid, for cooling the energy storage component (5);a plate degassing structure (100) configured to vent gas from the energy storage component (5) in the event of thermal runaway of the component, the plate degassing structure (100) comprising a degassing circuit (101) formed by at least one plate, this degassing circuit (101) having at least one gas vent (102) and being configured so that gas introduced into this degassing circuit (101) can escape only through at least one gas vent (102), the degassing structure (100) further being configured so that the degassing circuit (101) is sealed against the heat transfer fluid circuit (10). Figure for the abstract: Fig. 7;

Description

Title of the invention: Thermal regulation device

[0001] The present invention relates to a thermal regulation device for components whose operation is sensitive to temperature and susceptible to thermal runaway, these components being in particular intended for energy storage and possibly being battery cells, in particular for vehicles.

[0002] It is known nowadays to equip electric, thermal or hybrid vehicles with electrical energy storage components allowing an electrical supply to the various elements of the vehicle. These electrical energy storage components are generally composed of electrical energy storage cells positioned in a battery pack.

[0003] Car manufacturers are currently seeking to provide more powerful electric or hybrid vehicles with increased electric range. To this end, more and more battery packs, and / or increasingly larger battery packs, are being installed on these electric or hybrid vehicles. It is known to install all or at least some of these battery packs at the floor of the vehicle, substantially across the entire width of the vehicle.

[0004] It is understood that, during operation of the vehicle, the battery packs can release a significant amount of heat and therefore be subjected to temperature increases which can cause them to be damaged or even destroyed in certain cases. Consequently, their cooling is essential in order to keep them in good condition and thus ensure the reliability, autonomy and performance of the vehicle. Furthermore, the operation of the battery packs can be less efficient in the event of low temperatures, the electrical or electronic components equipping these battery packs then needing time to warm up before operating at full efficiency.

[0005] It is also known that battery cells, for example lithium-ion, can accidentally undergo a thermal runaway phenomenon which results in uncontrolled overheating. This increase in temperature can lead to a chain reaction which releases more heat. This can be caused by internal failures in the battery cell, such as short circuits or overcharges, which lead to a sudden and rapid release of thermal energy, as well as gases.

[0006] When thermal runaway occurs, it can lead to serious consequences, including combustion, explosion or deterioration of the battery, as well as risks to the safety of people and equipment.

[0007] The present invention aims in particular to improve safety in the event of runaway thermal.

[0008] The invention thus relates to a thermal regulation device for cooling at least one energy storage component, this energy storage component being capable of undergoing thermal runaway, this energy storage component being in particular a battery cell, the thermal regulation device comprising: - a heat transfer fluid circuit, in particular dielectric fluid, for cooling the energy storage component; - a plate degassing structure configured to evacuate gas from the energy storage component, in the event of thermal runaway of the component, the plate degassing structure comprising a degassing circuit formed by at least one plate, this degassing circuit having at least one gas evacuation and being configured so that gas introduced into this degassing circuit can escape only through the at least one gas evacuation, the degassing structure being further configured so that the degassing circuit is sealed to the heat transfer fluid circuit.

[0009] Thus, the degassing structure is configured to be assembled within the thermal regulation device which uses a heat transfer fluid, in particular a dielectric fluid.

[0010] In the invention, the heat transfer fluid does not enter the degassing circuit during operation of the thermal regulation device.

[0011] The invention is particularly advantageous insofar as it blocks any possible degassing in the heat transfer fluid circuit, in particular of dielectric fluid. This contributes to the safety of the device, by evacuating the gases to the outside of the device.

[0012] According to one aspect of the invention, the degassing structure comprises a degassing opening configured to be associated with said component and configured to communicate with the degassing circuit to allow said component to release gases into the degassing circuit through this degassing opening in the event of thermal runaway.

[0013] According to one aspect of the invention, the component susceptible to thermal runaway is provided with a pressure release mechanism, formed for example by a breakable portion configured to break in the event of overpressure within the component susceptible to thermal runaway.

[0014] According to one aspect of the invention, the degassing opening of the degassing structure is configured to be placed opposite the pressure release mechanism of the energy storage component allowing said component to release in the degassing circuit through this degassing opening, the gases in the event of thermal runaway.

[0015] According to one aspect of the invention, the degassing opening is formed on the plate which participates in the formation of the degassing circuit.

[0016] According to one aspect of the invention, the plate on which the degassing opening is made is a holding plate configured to hold the component.

[0017] According to one aspect of the invention, the holding plate comprises a seat configured to receive the component, in particular a cylindrical battery cell.

[0018] According to one aspect of the invention, a seal is present around each component and in particular on a seat of a holding plate so as to create a seal around the degassing opening of the holding plate when the component rests on the seal.

[0019] Thus the heat transfer fluid in which the component is immersed (at least partially) for its cooling does not pass through the degassing opening.

[0020] According to one aspect of the invention, the sealing gasket has a washer shape.

[0021] The seat is formed for example by an annular flat zone surrounding the degassing opening.

[0022] According to one aspect of the invention, the component, in particular the battery cell, rests on this annular flat area.

[0023] In another exemplary embodiment of the invention, the holding plate comprises a degassing opening configured to allow the component, in particular the battery cell, to be inserted through this degassing opening.

[0024] Thus the component passes through this degassing opening, and, in the event of thermal runaway, the pressure release mechanism which is then located on the side of the degassing circuit allows the gases to be released directly into the degassing circuit.

[0025] Thus it is noted that, depending on the case, the component rests on the holding plate, opposite the degassing opening, or the component passes through the degassing opening and has a portion which overflows into the degassing circuit.

[0026] For example, the holding plate is positioned relative to the component so as to allow between 5% and 30% of the height of the component to overflow into the degassing circuit.

[0027] Generally, the degassing structure comprises seals surrounding the components, in particular battery cells. This makes it possible to prevent the heat transfer fluid from the heat transfer fluid circuit from passing into the degassing circuit.

[0028] Normally, outside of a thermal runaway situation, the circuit of degassing is free. In other words, the degassing circuit is empty of heat transfer fluid.

[0029] According to one aspect of the invention, the joints are formed on a mat of joints.

[0030] In other words, the joints are formed on a single piece, in the form of a carpet.

[0031] The gasket mat can be positioned at a certain height of the component, for example above the holding plate (i.e. on the face of the holding plate which is opposite the degassing circuit).

[0032] Sealing gaskets, or the gasket mat, may be overmolded onto the retaining plate.

[0033] According to one aspect of the invention, the degassing circuit comprises at least one channel configured to guide the degassing gases towards the gas discharge.

[0034] According to one aspect of the invention, the channel may comprise at least one rectilinear section and / or one curved section.

[0035] According to one aspect of the invention, the degassing opening(s) formed on the holding plate open onto this channel.

[0036] According to one aspect of the invention, the holding plate comprises at least one row of degassing openings which open onto the channel, in particular a plurality of rows.

[0037] Thus these degassing openings share the same channel.

[0038] According to one aspect of the invention, a row of components is placed along this channel so that in the event of one or more of the components running away, the channel allows the gas for this or these components to be evacuated.

[0039] According to one aspect of the invention, the degassing circuit is formed between the holding plate and a bottom plate.

[0040] According to one aspect of the invention, the channel(s) of the degassing circuit are delimited by ribs which extend from the base plate to the holding plate.

[0041] Thus the height of the ribs corresponds to the height measured between the base plate and the retaining plate.

[0042] In another exemplary embodiment of the invention, the degassing structure is configured to be placed on top of the components, and not on the bottom of the components. In this case, the bottom plate is replaced by a top plate which delimits the degassing circuit.

[0043] According to one aspect of the invention, the degassing opening is distinct from the holding plate configured to hold the energy storage component. Thus the degassing opening is not made on the holding plate, but for example on distinct reliefs.

[0044] According to one aspect of the invention, the degassing circuit comprises a plurality of channels extending parallel to each other.

[0045] According to one aspect of the invention, these channels each comprise at least one rectilinear section, and the rectilinear sections are parallel to each other.

[0046] In the case where the degassing circuit is formed between a separation plate and a bottom plate, the rib(s) defining the channels are formed in particular in a single piece with one of the retaining plate and the bottom plate.

[0047] According to one aspect of the invention, the rib(s) are solid. Thus, the channels on either side of the rib do not communicate with each other along this rib. These solid ribs are in particular devoid of holes or openings. This makes it possible in particular to separate rows of cells in order to limit thermal propagation.

[0048] According to one aspect of the invention, the rib follows, for example, a rectilinear line between the degassing opening and the gas discharge.

[0049] Alternatively, the rib(s) comprise at least one slot or orifice allowing gas to pass from one channel to another neighboring channel.

[0050] This allows for better distribution, if necessary, of the gas to be evacuated.

[0051] According to one aspect of the invention, these slots or orifices may be present throughout along the rib.

[0052] In another exemplary embodiment of the invention, the degassing circuit is formed by a single chamber.

[0053] Thus, gases resulting from thermal runaway can be released into this chamber, and the chamber directs these gases towards the gas evacuation.

[0054] Mechanical holding members may be provided to support the component(s) which are placed, for example, on top of the degassing circuit.

[0055] The holding members are, for example, studs or ribs with a closed circumference, for example with a circular circumference.

[0056] According to one aspect of the invention, the components have their pressure release mechanism positioned opposite these holding members.

[0057] The mechanical holding members can be arranged in the chamber.

[0058] Alternatively, the mechanical holding members are arranged in one of the channels of the degassing circuit.

[0059] According to one aspect of the invention, these closed-peripheral ribs comprise slots or orifices configured to allow the degassing gases to leave the periphery of these ribs and to be released, as the case may be, into a chamber or a channel of the degassing circuit.

[0060] The retaining plate may be made of metal, or of a composite material, for example of the type with at least one reinforcing sheet impregnated with a thermoplastic material.

[0061] Thus the rigidity is chosen to support the weight of the components.

[0062] The components are cooled by the heat transfer fluid and the holding plate can serve as a sealed base for this heat transfer fluid.

[0063] According to one aspect of the invention, the degassing circuit comprises one or more gas outlets.

[0064] According to one aspect of the invention, at least one of the gas outlets is positioned on a side of the degassing structure.

[0065] According to one aspect of the invention, at least one of the gas vents is positioned on the base plate.

[0066] According to one aspect of the invention, the gas vent(s) are positioned on only one side of the degassing structure.

[0067] Two gas outlets may be provided on two different sides of the degassing structure.

[0068] According to one aspect of the invention, the thermal regulation device comprises a safety valve at each gas discharge from the degassing circuit, this safety valve being closed under normal circumstances and being able to open from a pressure threshold in the degassing circuit.

[0069] According to one aspect of the invention, there are as many degassing openings as there are battery cells.

[0070] According to one aspect of the invention, the thermal regulation device comprises a housing forming an enclosure configured to receive one or more components immersed, at least partially, in a dielectric fluid.

[0071] According to one aspect of the invention, the plate for holding the degassing structure is placed in this housing.

[0072] According to one aspect of the invention, the bottom plate is assembled with this housing.

[0073] According to one aspect of the invention, the housing comprises a chimney configured to direct gases to the gas outlet.

[0074] According to one aspect of the invention, the chimney is substantially perpendicular to the holding plate. In other words, the chimney extends in the direction of the height of the housing.

[0075] According to one aspect of the invention, the chimney opens onto an orifice on the housing, an orifice which forms the gas evacuation at the outlet of the degassing circuit.

[0076] The invention also relates to a module of a motor vehicle battery pack assembly, the module being equipped with a thermal regulation device as described previously, the module housing a plurality of cells cooled by the thermal regulation device.

[0077] The invention also relates to a battery pack assembly comprising a plate forming the bottom of the battery pack assembly, the plate comprising longitudinal walls tudinals separating said plate into several housings capable of accommodating modules such as those mentioned above, for example comprising battery cells, the battery pack assembly also comprising a cover, the battery pack assembly being characterized in that it further comprises a clamping element arranged between the plate and the cover, this element being configured to block the modules and to be fixed to the cover and to the plate.

[0078] Other characteristics, details and advantages of the invention will emerge more clearly on reading the description which follows on the one hand, and several exemplary embodiments given for informational and non-limiting purposes with reference to the appended schematic drawings on the other hand, in which:

[0079] [Fig-1] [Fig. 1] is a perspective representation of a battery pack module according to an exemplary embodiment of the invention;

[0080] [Fig.2] [Fig.2] is a view of the module of [Fig.l], without the cover;

[0081] [Fig.3] [Fig.3] is a bottom representation of the module of [Fig.l];

[0082] [Fig.4] [Fig.4] is a perspective representation of the housing with the carpet of joints of the module of [Fig.l];

[0083] [Fig.5] [Fig.5] is a representation of the housing of [Fig.4], without the gasket mat

[0084] [Fig.6] [Fig.6] is a perspective view of the bottom plate of the module of the [Fig.l];

[0085] [Fig.7] [Fig.7] is a sectional view of the module of [Fig.l];

[0086] [Fig.8] [Fig.8] is a top view representation of holding members according to another exemplary embodiment of the invention;

[0087] [Fig.9] [Fig.9] is a cross-sectional representation of one module according to another exemplary embodiment of the invention;

[0088] [Fig. 10] [Fig. 10] is a sectional representation of a module according to yet another exemplary embodiment of the invention;

[0089] [Fig. 11] [Fig. 11] is a sectional representation of a module according to yet another exemplary embodiment of the invention.

[0090] The features, variants and the different embodiments of the invention may be combined with each other, in various combinations, provided that they are not incompatible or mutually exclusive. In particular, variants of the invention may be imagined comprising only a selection of features described below in isolation from the other features described, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0091] [Fig.l] shows a module 200 of a battery pack assembly of motor vehicle, module 200 equipped with a thermal regulation device 1 according to an exemplary embodiment of the invention.

[0092] As can be seen in particular in [Fig.2], the thermal regulation device 1 comprises a housing 2 (shown alone in [Fig.5]) forming an enclosure 3 receiving several rows of battery cells 5 immersed in a dielectric fluid.

[0093] These battery cells 5, of cylindrical shape, are of the lithium-ion type. Other types of battery can of course be envisaged.

[0094] Height is the dimension measured along the X axis of the cylindrical shape of cells 5.

[0095] The cells 5 are arranged in the enclosure 3 in parallel rows, in a staggered pattern, to gain compactness. Other arrangements are of course possible.

[0096] The housing 2 is closed by a cover 201 configured to close the enclosure 3 having received the cells 5 in a fluid-tight manner against the dielectric fluid.

[0097] The thermal regulation device 1 comprises a circuit 10 of dielectric fluid passing through the enclosure 3 and being provided with a fluid inlet 11 and a fluid outlet 12 so as to be able to be fluidically connected, when the housing 2 is placed on a base (not shown), respectively to a dielectric fluid supply end piece 6 and a dielectric fluid discharge end piece of the base.

[0098] Figures 2, 3 and 7 show dotted arrows symbolizing the flow of fluid in the fluid circuit 10.

[0099] The fluid inlet 11 of the housing 2 has a female shape into which a male type fluid supply nozzle can be engaged.

[0100] The fluid outlet 12 of the housing 2 has a female shape in which a fluid discharge nozzle 7, of the male type, can be engaged.

[0101] The fluid inlet 11 comprises a substantially cylindrical cavity of axis X.

[0102] The battery cells 5, of cylindrical shape, are arranged in the direction of the height of the housing 2 (the height being the dimension along the X axis).

[0103] The housing 2 has a generally rectangular perimeter, and the fluid inlet 11 is located on a small side of this rectangular perimeter.

[0104] The fluid inlet 11 opens into the enclosure 3 via a flare 17.

[0105] Thus the dielectric fluid which arrives in the housing 2 at the level of the fluid inlet 11 is distributed, thanks to this flare 17, over the entire width of the enclosure 3, as can be seen in [Fig.2] for example.

[0106] The fluid outlet 12 of the housing 2 comprises a converging channel 36 (visible in [Fig.5]) through which the dielectric fluid is evacuated after having cooled the cells 5.

[0107] The converging channel 36 of the fluid outlet 12 is formed on a flank opposite that where the fluid inlet 11 is present.

[0108] The housing 2 comprises a side wall 40 extending perpendicular to the bottom wall of the housing 2.

[0109] The side wall 40 delimits the perimeter of the enclosure 3, a perimeter which envelops the battery cells 5 placed in the enclosure 3.

[0110] The side wall 40 comprises corrugations 41 making it possible to match the shape of the cylindrical battery cells 5 placed in the enclosure 3.

[0111] This allows the housing 2 to be compact, with the least possible loss of space.

[0112] The cells 5 are electrically connected, on top, to electrical bars 58 (or "busbar" in English) visible in [Fig.7]. The electrical network for connecting cells 5 is not described in more detail, because it is well known, with positive polarity connections and negative polarity connections.

[0113] The enclosure 3 is configured to receive the cells 5 in immersion, at least partially, in the dielectric fluid.

[0114] The thermal regulation device 1 further comprises a plate degassing structure 100 configured to evacuate gas from one or more cells 5, in the event of thermal runaway.

[0115] The plate degassing structure 100 comprises a degassing circuit 101 (visible in FIGS. 6 and 7) formed by at least one plate.

[0116] This degassing circuit has two gas outlets 102 and is configured so that gas introduced into this degassing circuit 101 can escape only through these two gas outlets 102. These two gas outlets 102 are arranged on the same side of the housing 2, for example on either side of the fluid inlet 11 as in the example described.

[0117] Alternatively, the degassing circuit may comprise a single gas outlet 102.

[0118] As a further variant, at least one of the gas vents 102 is positioned on a bottom plate of the device 1.

[0119] The degassing structure 100 is further configured so that the degassing circuit 101 is sealed to the heat transfer fluid circuit 10.

[0120] In the invention, the dielectric fluid does not penetrate into the degassing circuit 101 during operation of the thermal regulation device 1.

[0121] The housing 2 comprises a chimney 77 configured to direct the gases towards the gas outlet 102.

[0122] The chimney 77 extends in the direction of height, namely parallel to the X axis, as can be clearly seen in [Fig.7].

[0123] The chimney 77 opens onto an orifice 103 on the side of the housing 2, orifice 103 which forms the gas evacuation 102 at the outlet of the degassing circuit 101.

[0124] The thermal regulation device 1 comprises a safety valve 105 at each gas evacuation 102 from the degassing circuit, this safety valve 105 being closed under normal circumstances and being able to open from a pressure threshold in the degassing circuit 101.

[0125] Each cell 5 is provided with a pressure release mechanism 16, formed by a breakable portion configured to break in the event of overpressure during thermal runaway.

[0126] Each degassing opening 110 of the degassing structure 100 is placed opposite the pressure release mechanism 16 of the associated cell 5.

[0127] The degassing openings 110 are formed on the plate which participates in the formation of the degassing circuit 100.

[0128] The plate 120 on which the degassing openings 110 are made is a holding plate configured to hold and support the battery cells 5.

[0129] In the example described, as can be seen in Figures 6 and 7, the plate 120 forms the bottom of the housing 2. The plate 120 is formed in one piece with the rest of the housing 2, for example by injection molding. In particular, the holding plate 120 and the side wall 40 are formed in one piece.

[0130] An openwork upper plate 99 is arranged in the enclosure 3 to hold the top of the cells 5. Thus the cells 5 rest at the bottom on the holding plate 120 and are held at the top by the upper plate 99.

[0131] The holding plate 120 comprises, around each degassing opening 110, a seat 121 configured to receive the cell 5.

[0132] A seal 122 is present on each seat 121 of the holding plate 120 so as to create a seal around the degassing opening 110 when the cell 5 rests on the seal 122.

[0133] Each seal 122 has a lip 123 which surrounds the cell 5 over a small height.

[0134] Thus the heat transfer fluid in which the cells 5 are immersed (at least partially) does not pass through the degassing openings 110.

[0135] Each seal 122 has a washer shape.

[0136] The joints 11 are formed on a mat of joints 125

[0137] In other words, the joints 122 are all formed on a single piece, in the form of a mat 125.

[0138] The gasket mat 125 on top of the holding plate 120, that is to say on the face of the holding plate which is opposite the degassing circuit.

[0139] Each seat 121 is formed for example by an annular flat zone surrounding the degassing opening 110.

[0140] The degassing circuit 100 comprises channels 130 configured to guide the degassing gases towards the gas vents 102.

[0141] Each channel 130 is rectilinear, and the row of degassing openings 110 formed on the holding plate 120 associated with each row of cells 5 open onto one of the channels 130.

[0142] As a reminder, the holding plate 120 comprises a plurality of rows of degassing openings 110.

[0143] In the example described, the degassing circuit 101 is formed between the holding plate 120 and a bottom plate 140.

[0144] The channels 130 are delimited by rectilinear ribs 141 which extend, in height, from the bottom plate 140 to the holding plate 120.

[0145] Thus the height of the ribs 141 corresponds to the height measured between the base plate 140 and the holding plate 120.

[0146] As can be seen in [Fig.6], the channels 130, which are parallel to each other, are closed at one of their longitudinal ends 134 and join at the other of their ends, a collection zone 135 which then opens onto the chimney 77 connected to the gas evacuations 102.

[0147] In another exemplary embodiment of the invention (not shown), the degassing structure 100 is configured to be placed on top of the cells 5, and not on the bottom of the cells 5. In this case, the bottom plate is replaced by an upper plate which delimits the degassing circuit 101.

[0148] The ribs 141 defining the channels 130 are formed integrally with the bottom plate 140.

[0149] The ribs 141 are solid. Thus the channels 130 on either side of each rib 141 do not communicate with each other along this rib. These solid ribs 141 are in particular devoid of holes or openings. This makes it possible in particular to separate rows of cells in order to limit thermal propagation.

[0150] Alternatively, the rib(s) 141 may comprise at least one slot or orifice allowing the gas to pass from one channel 130 to another neighboring channel.

[0151] This allows for better distribution, if necessary, of the gas to be evacuated. These slots or orifices can be present all along the rib.

[0152] In another exemplary embodiment of the invention, the holding plate comprises degassing openings 110 configured to allow the battery cell 5 to be inserted through each degassing opening 110.

[0153] Thus the cell 5 passes through this degassing opening 110, and, in the event of thermal runaway, the pressure release mechanism which is then located on the side of the degassing circuit 101 makes it possible to release the gases directly into the degassing circuit 101.

[0154] Thus it can be seen that, depending on the case, the cell 5 rests on the holding plate 120, opposite the degassing opening 110, or the cell 5 passes through the opening of degassing 110 and has a portion which overflows into the degassing circuit 101.

[0155] For example, the holding plate 120 is positioned relative to the cell 5 so as to allow between 5% and 30% of the height of the cell 5 to overflow into the degassing circuit 101, as illustrated in [Fig.9].

[0156] The sealing gaskets 122, or the gasket mat 125, may be on top of the retaining plate 120, or be attached under the retaining plate (see [Fig. 10]).

[0157] In the example of [Fig. 11], the sealing gaskets 122, or the mat of gaskets 125, can be integrated into the retaining plate 120, and extend beyond either side of the retaining plate 120.

[0158] In the exemplary embodiments of the invention of FIGS. 9 to 11, the degassing circuit 101 is formed by a single chamber 160, instead of channels 130.

[0159] Thus the gases resulting from thermal runaway can be released into this chamber 160, and the chamber 160 conducts these gases towards the gas evacuation.

[0160] Mechanical holding members 161 may be provided on a base plate 163, to serve to support the cells 5. The weight of the cells 5 is exerted on these holding members 161.

[0161] The holding plate 120 then does not serve to support the cells 5 (in the sense of supporting the weight of the cells 5), but to maintain the arrangement in rows of the cells 5.

[0162] The holding members 161 are for example studs or ribs with a closed perimeter, for example with a circular perimeter as illustrated in [Fig.8] in top view.

[0163] The cells 5 have their pressure release mechanism 16 positioned opposite these holding members 161.

[0164] The mechanical holding members 161 can be arranged in the chamber 160.

[0165] As a variant (not shown), mechanical holding members are arranged in one of the channels 130 of the degassing circuit.

[0166] These closed perimeter ribs 161 comprise slots or orifices 166 configured to allow the degassing gases to leave the perimeter of these ribs 161 and to be released, as the case may be, into a chamber 160 or a channel of the degassing circuit 130.

[0167] The holding plate 120 may be made of metal, or of a composite material, for example of the type with at least one reinforcing sheet impregnated with a thermoplastic material.

[0168] In all cases, the holding plate 120 serves as a bottom impervious to the dielectric fluid.

Claims

Claims

1. Thermal regulation device (1) for cooling at least one energy storage component (5), this energy storage component being capable of undergoing thermal runaway, this energy storage component being in particular a battery cell, the thermal regulation device (1) comprising: - a heat transfer fluid circuit (10), in particular dielectric fluid, for cooling the energy storage component (5);- a plate degassing structure (100) configured to evacuate gas from the energy storage component (5), in the event of thermal runaway of the component, the plate degassing structure (100) comprising a degassing circuit (101) formed by at least one plate, this degassing circuit (101) having at least one gas evacuation (102) and being configured so that gas introduced into this degassing circuit (101) can escape only through the at least one gas evacuation (102), the degassing structure (100) being further configured so that the degassing circuit (101) is sealed to the heat transfer fluid circuit (10).;

2. Thermal regulation device (1) according to the preceding claim, wherein the degassing structure (100) comprises a degassing opening (110) configured to be associated with said component and configured to communicate with the degassing circuit (101) to allow said component to release gases into the degassing circuit (101) through this degassing opening (110) in the event of thermal runaway, and in particular the degassing opening (110) of the degassing structure (100) is configured to be placed opposite a pressure release mechanism (16) of the energy storage component (5) allowing said component to release gases into the degassing circuit (101) through this degassing opening (110) in the event of thermal runaway.

3. A thermal regulation device (1) according to claim 2, wherein the degassing opening (110) is formed on the plate which participates in the formation of the degassing circuit (101).

4. Thermal regulation device (1) according to claim 3, wherein the plate on which the degassing opening (110) is made is a holding plate (120) configured to hold the component.

5. Thermal regulation device (1) according to claim 4, wherein the holding plate (120) comprises a seat configured to receive the component, in particular a cylindrical battery cell.

6. Thermal regulation device (1) according to claim 4, in which the holding plate (120) comprises a degassing opening (110) configured to allow the component, in particular the battery cell, to be inserted through this degassing opening (110), and for example, the holding plate (120) is positioned relative to the component so as to allow between 5% and 30% of the height of the component to overflow into the degassing circuit (101).

7. Thermal regulation device (1) according to one of the preceding claims, in which the degassing structure (100) comprises at least one seal (122) configured to be present around each component (5) and in particular on a seat of a holding plate (120) so as to create a seal around the degassing opening (110) of the holding plate (120) when the component rests on the seal (122).

8. Thermal regulation device (1) according to one of the preceding claims, in which the degassing circuit (101) comprises at least one channel (130) configured to guide the degassing gases towards the gas outlet (102), and in particular the degassing opening(s) (110) formed on a holding plate (120) open onto this channel (130).

9. Thermal regulation device (1) according to one of the preceding claims, in which the degassing circuit (101) is formed between a holding plate (120) and a base plate (140).

10. Thermal regulation device (1) according to claim 9, in which the channel(s) (130) of the degassing circuit (101) are delimited by ribs (141) which extend in particular from the base plate (140) to the holding plate (120), and in particular the rib(s) (141) comprise at least one slot or orifice allowing the gas to pass from one channel (130) to another neighboring channel.

11. Thermal regulation device (1) according to one of claims 1 to 7, in which the degassing circuit (101) is formed by a single chamber (160).

12. Thermal regulation device (1) according to one of claims 2, 7, 8, 9 and 11, wherein the degassing opening (110) is separate from a holding plate (120) configured to hold the energy storage component (5).

13. Thermal regulation device (1) according to one of the preceding claims, in which the thermal regulation device comprises a safety valve (105) at each gas discharge (102) from the degassing circuit (101), this safety valve being closed under normal circumstances and being able to open from a pressure threshold in the degassing circuit (101).

14. Module (200) of a motor vehicle battery pack assembly, the module being equipped with a thermal regulation device (1) according to one of the preceding claims, the module housing a plurality of cells (5) cooled by the thermal regulation device.

15. Battery pack assembly comprising a plate forming the bottom of the battery pack assembly, the plate comprising longitudinal walls separating said plate into several housings capable of accommodating modules (200) according to claim 14, for example comprising battery cells, the battery pack assembly also comprising a cover, the battery pack assembly being characterized in that it further comprises a clamping element arranged between the plate and the cover, this element being configured to block the modules and to be fixed to the cover and to the plate

Images