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 being able to be battery cells, in particular for vehicles.

[0002] It is now common practice to equip electric, internal combustion, or hybrid vehicles with electrical energy storage components that provide power to the various vehicle components. These electrical energy storage components are generally composed of electrical energy storage cells positioned within a battery pack.

[0003] Today, car manufacturers are seeking to provide more powerful electric or hybrid vehicles with increased electric range. To achieve this, 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 in the vehicle floor, essentially across the entire width of the vehicle.

[0004] It is understood that, during vehicle operation, battery packs can generate a significant amount of heat and therefore be subject to temperature increases that can, in some cases, cause damage or even destruction. Consequently, cooling them is essential to maintain their condition and thus ensure the vehicle's reliability, range, and performance. Furthermore, the operation of battery packs may be less efficient at low temperatures, as the electrical or electronic components equipping these battery packs then require a warm-up period before operating at full capacity.

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

[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 persons and equipment.

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

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

[0011] The invention is particularly advantageous insofar as it prevents any outgassing in the heat transfer fluid circuit, particularly of dielectric fluid. This contributes to the safety of the device by venting the gases to the outside of the device.

[0012] According to one aspect of the invention, the degassing structure includes 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 positioned opposite the release mechanism. pressure of the energy storage component allowing said component to release gases into the degassing circuit through this degassing opening in case 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 retaining plate configured to hold the component.

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

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

[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 a flat annular area 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 embodiment of the invention, the retaining plate has a venting opening configured to allow the component, in particular the battery cell, to be inserted through this venting opening.

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

[0025] Thus, it can be seen that, depending on the case, the component rests on the retaining plate, opposite the venting opening, or the component passes through the venting opening and has a portion that overflows into the venting circuit.

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

[0027] Generally, the degassing structure includes seals surrounding the components, particularly the battery cells. This prevents the heat transfer fluid from the heat transfer fluid circuit from passing into the degassing circuit.

[0028] Under normal conditions, except in situations of thermal runaway, the degassing circuit 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 sealing mat can be positioned at a certain height of the component, for example above the retaining plate (i.e. on the face of the retaining plate which is opposite the degassing circuit).

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

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

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

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

[0036] According to one aspect of the invention, the retaining 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 runaway of one or more of the components, the channel allows the gas to be evacuated for that or those components.

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

[0040] According to one aspect of the invention, the channel or channels of the degassing circuit are delimited by ribs which extend from the bottom plate to the retaining plate.

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

[0042] In another 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 that delimits the degassing circuit.

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

[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 straight section, and the straight sections are parallel to each other.

[0046] In the case where the degassing circuit is formed between a separating plate and a bottom plate, the rib(s) defining the channels are formed in particular in a monobloc fashion with one less 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 notably devoid of holes or openings. This makes it possible, in particular, to separate rows of cells in order to limit heat transfer.

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

[0049] Alternatively, the rib(s) include at least one slot or orifice allowing gas to pass from one channel to another neighbouring 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 embodiment of the invention, the degassing circuit is formed by a single chamber.

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

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

[0055] The retaining elements are for example studs or ribs with a closed perimeter, for example with a circular perimeter.

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

[0057] The mechanical retaining devices can be arranged in the chamber.

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

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

[0060] The retaining plate can 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, rigidity is chosen to support the weight of the components.

[0062] The components are cooled by the heat transfer fluid and the retaining 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 vents.

[0064] According to one aspect of the invention, at least one of the gas vents 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 bottom 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 vents can be provided on two different sides of the degassing structure.

[0068] According to one aspect of the invention, the thermal regulation device includes a safety valve at each gas evacuation of the degassing circuit, this safety valve being closed under normal conditions 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 venting 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 retaining plate of the degassing structure is placed in this housing.

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

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

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

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

[0076] The invention further relates to a module of a motor vehicle battery pack assembly, the module being equipped with a thermal regulation device such as As described previously, the module houses 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 base of the battery pack assembly, the plate comprising longitudinal walls separating said plate into several housings suitable for receiving 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 disposed between the plate and the cover, this element being configured to lock the modules and to be fixed to the cover and the plate.

[0078] Other features, details and advantages of the invention will become clearer upon reading the following description on the one hand, and several illustrative and non-limiting examples of embodiments given with reference to the accompanying schematic drawings on the other hand, in which:

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

[0080] [Fig.2] The [Fig.2] is a view of the module of the [Fig.1], without the cover;

[0081] [Fig.3] The [Fig.3] is a representation of the underside of the module of the [Fig.1];

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

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

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

[0085] [Fig.7] The [Fig.7] is a cross-sectional view of the module of the [Fig.1];

[0086] [Fig.8] Fig.8 is a top view representation of retaining organs according to another example of the realization of the invention;

[0087] [Fig.9] Fig.9 is a cross-sectional representation of one module along another example of the implementation of the invention;

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

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

[0090] The features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features, which will be described hereafter in isolation from the others. characteristics described, if this selection of characteristics is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

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

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

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

[0094] The height is defined as the dimension measured along the X axis of the cylindrical shape of cells 5.

[0095] The cells 5 are arranged in enclosure 3 in parallel, staggered rows to achieve greater compactness. Other arrangements are of course possible.

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

[0097] The thermal regulation device 1 includes a dielectric fluid circuit 10 passing through the enclosure 3 and having a fluid inlet 11 and a fluid outlet 12 so as to be able to be fluidly connected, when the housing 2 is placed on a base (not shown), respectively to a dielectric fluid supply nozzle 6 and a dielectric fluid outlet nozzle of the base.

[0098] Figures 2, 3 and 7 show dashed arrows symbolizing the fluid flow of 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 into which a male-type fluid evacuation nozzle 7 can be engaged.

[0101] The fluid inlet 11 has a substantially cylindrical cavity with axis X.

[0102] The cylindrical battery cells 5 are arranged in the direction of the height of the case 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 short side of this rectangular perimeter.

[0104] The fluid inlet 11 opens into the enclosure 3 through 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 has a converging channel 36 (visible in [Fig.5]) through which the dielectric fluid is evacuated after cooling the cells 5.

[0107] The converging channel 36 of the fluid outlet 12 is formed on a flank opposite to that where the fluid inlet IL is located

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

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

[0110] The side wall 40 has undulations 41 to conform to the shape of the cylindrical battery cells 5 placed in the enclosure 3.

[0111] This allows for a compact case 2, with the least possible loss of space.

[0112] The cells 5 are electrically connected, on top, to electrical busbars 58 visible in [Fig. 7]. The electrical connection network of the cells 5 is not described in further detail, as it is well known, with positive polarity connections and negative polarity connections.

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

[0114] The thermal regulation device 1 further includes 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 includes a degassing circuit 101 (visible in Figures 6 and 7) formed by at least one plate.

[0116] This degassing circuit has two gas vents 102 and is configured so that gas introduced into this degassing circuit 101 can escape only through these two gas vents 102. These two gas vents 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 include a single gas vent 102.

[0118] Alternatively, at least one of the gas vents 102 is positioned on a base plate of device 1.

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

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

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

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

[0123] The chimney 77 opens into 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 includes a safety valve 105 at each gas outlet 102 of the degassing circuit, this safety valve 105 being closed under normal conditions 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 case of overpressure during a 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 retaining 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 as a single piece with the rest of the housing 2, for example by injection molding. In particular, the retaining plate 120 and the side wall 40 are formed in the same piece.

[0130] A perforated 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 retaining plate 120 and are held at the top by the upper plate 99.

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

[0132] A sealing gasket 122 is present on each seat 121 of the retaining plate 120 so as to create a seal around the degassing opening 110 when the cell 5 rests on the sealing gasket 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 sealing gasket 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 sealing mat 125 on top of the retaining plate 120, i.e. on the face of the retaining plate which is opposite to the degassing circuit.

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

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

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

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

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

[0144] The channels 130 are delimited by straight ribs 141 which extend vertically from the base plate 140 to the retaining plate 120.

[0145] Thus the height of the ribs 141 corresponds to the height measured between the base plate 140 and the retaining 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 leads to the chimney 77 connected to the gas vents 102.

[0147] In another embodiment of the invention (not illustrated), 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 a top plate which delimits the degassing circuit 101.

[0148] The ribs 141 defining the channels 130 are formed in a monobloc fashion with the base 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 that rib. These solid ribs 141 are notably devoid of holes or openings. This allows, in particular, for the separation of cell rows in order to limit heat transfer.

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

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

[0152] In another embodiment of the invention, the retaining plate has venting openings 110 configured to allow the battery cell 5 to be inserted through each venting 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 on the side of the degassing circuit 101 allows the gases to be released directly into the degassing circuit 101.

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

[0155] For example, the retaining 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 protrude into the degassing circuit 101, as illustrated in [Fig.9].

[0156] The sealing gaskets 122, or the gasket mat 125, can 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 gasket mat 125, can be integrated into the retaining plate 120, and extend beyond the retaining plate 120 on either side.

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

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

[0160] Mechanical retaining elements 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 retaining elements 161.

[0161] The retaining plate 120 is then not used 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 retaining members 161 are for example studs or ribs with a closed perimeter, for example with a circular perimeter as illustrated in the [Fig.8] top view.

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

[0164] The mechanical retaining elements 161 can be arranged in the chamber 160.

[0165] In an alternative (not illustrated), mechanical retaining devices are arranged in one of the channels 130 of the degassing circuit.

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

[0167] The retaining plate 120 can 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 retaining plate 120 serves as a base that is sealed against the dielectric fluid.

Claims

Demands

1. Thermal control 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 control 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) is further configured so that the degassing circuit (101) is sealed against the heat transfer fluid circuit (10), the degassing circuit (101) being formed between a retaining plate (120) and a base plate (140). One or more channels (130) of the degassing circuit (101) are delimited by ribs (141) extending from the base plate (140) to the retaining plate (120), and in particular the rib(s) (141) have at least one slot or orifice allowing gas to pass from one channel (130) to another adjacent channel.

2. Thermal control device (1) according to the preceding claim, wherein the degassing structure (100) has 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 opening degassing (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 into the degassing circuit (101) through this degassing opening (110), the gases in case of thermal runaway.

3. 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 the retaining plate (120) configured to retain the component.

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

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

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

8. Thermal regulation device (1) according to any one of the preceding claims, wherein a channel (130) of the degassing circuit (101) is configured to guide the degassing gases towards the gas vent (102), and in particular the degassing opening(s) (110) formed on the retaining plate (120) open onto this channel (130).

9. Thermal control device (1) according to any one of the preceding claims, wherein the thermal control device comprises a safety valve (105) at each gas outlet (102) of the degassing circuit (101), this safety valve being closed under normal conditions and being able to open from a pressure threshold in the degassing circuit (101).

10. Module (200) of an assembly of battery packs for motor vehicles, the module being equipped with a thermal regulation device (1) according to any one of the preceding claims, the module housing a plurality of cells (5) cooled by the thermal regulation device.

11. A battery pack assembly comprising a plate forming the base of the battery pack assembly, the plate comprising longitudinal walls dividing said plate into several compartments suitable for receiving modules (200) according to claim 10, for example comprising battery cells, the battery pack assembly also comprising a cover, the battery pack assembly being characterized in that it comprises a thermal regulation device according to any one of claims 1 to 9, and furthermore a clamping element disposed between the plate and the cover, this element being configured to lock the modules and to be fixed to the cover and the plate

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