Cooling device for electric battery bag cell

Abstract

The invention relates to a cooling device (10) for a bagged cell (100d) of an electric battery module (100), the device (10) comprising an electrically insulating blade (11) provided with slots (2a, 2b, 2c, 2d, 2e, 2f, 2g) traversed by an electrode (4d), the device (10) comprising at least one metal flange (1d) arranged between two of the slots (2d, 2e) and comprising a surface covered by a thermal interface material (3d) for thermally connecting the metal flange (1d) to a plate (110) of the electric battery module (100), the plate being able to be actively thermally regulated. The invention also relates to an electric battery module (100) comprising the cooling device (10), an electric battery (100), an electric battery comprising the module (100) and a method for manufacturing the cooling device (10). Abstract figure: figure 1

Description

Title of the invention: Cooling device for electric battery bag cell Technical field of the invention

[0001] The present description relates to the field of energy storage. The present invention relates to a bag cell cooling device. The invention relates to a module comprising such a cooling device as well as an electric vehicle battery comprising such a module. The invention also relates to a method for manufacturing such a cooling device. State of the art

[0002] In many industrial sectors, for example in the field of electric vehicles, it is known to design energy storage systems to power various applications, in particular the motors of these electric vehicles. An obstacle frequently encountered by these systems lies in the difficulty of efficiently managing the heat generated by these modules during the charge and discharge cycles of the cells that comprise these modules. Another obstacle lies in the need to maintain the battery cells in an ideal temperature range for optimal operation. Indeed, a cell subjected to temperatures that are too low will not function correctly. Temperatures that are too high can impair the performance of the cells, or even lead to their destruction. Heat removal is therefore a sought-after need, as well as solutions for protection against intense cold conditions.

[0003] Charge and discharge cycles generate heat. The heat travels through the electrodes. Too high a temperature can damage the module and the cell itself. Heat is generated both by the electrical connections and by the cell itself. This combination of heat sources underlines the importance of regulating the temperature of the electrical connections and the cell. High temperatures are a potential threat to the cell.

[0004] To address this problem, techniques for cooling battery modules are known, such as circulating coolants through specially designed channels in the battery packs. These techniques make it possible to maintain the temperature of the cells at an acceptable level, thus contributing to the safety and durability of batteries for electric vehicles.

[0005] However, the known devices have many disadvantages. First of all, their use to reduce the heating of the electrodes of the cells of electric battery modules leads to an often high energy consumption, and also complex to implement due to the large volume they occupy. This also increases the overall manufacturing cost of batteries and electric vehicles. Furthermore, these systems can take up valuable space within a given battery pack, thus reducing the battery's energy density. Furthermore, coolant leaks can lead to safety and environmental pollution issues. Other known cooling techniques, for example, the use of air cooling systems, using fans or blowers, are also known but have the disadvantage of being bulky, and less effective at dissipating large amounts of heat or maintaining the electrodes at uniform temperatures. These disadvantages clearly illustrate the limitations of existing cooling techniques.

[0006] Therefore, there is a need to develop solutions to improve the efficient management of heat generated within battery packs and modules of such electric batteries, without the drawbacks of traditional techniques. Subject of the invention

[0007] In order to address this or these drawbacks, there is proposed according to a first object of the present invention a cooling device for at least one sachet cell of an electric battery module, the cooling device comprising an electrically insulating blade provided with a plurality of slots, each slot being designed to be crossed by a respective electrode of the at least one sachet cell, and a plurality of metal flanges, each metal flange being arranged between two slots of the plurality of slots and comprising, on the one hand, a first surface adapted to be in contact with the electrode passing through the respective slot and, on the other hand, at least one second surface covered by a thermal interface material, the thermal interface material being adapted to thermally connect the second surface of the metal flange to at least one plate of the electric battery module,said plate being capable of being thermally regulated actively.

[0008] Herein, active thermal regulation of a plate may be implemented by means capable of dynamically controlling and / or maintaining the temperature of this plate.

[0009] This provides an efficient, economical and environmentally friendly solution for maintaining battery cell temperature at an optimal level.

[0010] According to one embodiment, the first surface of at least one of the metal flanges is between 50 square millimeters and 2000 square millimeters and / or in which the second surface of at least one of the metal flanges is between 30 square millimeters and 2000 square millimeters.

[0011] This makes it possible, in the case where the first surface of at least one of the metal flanges is between 50 square millimeters and 2000 square millimeters, to provide an optimal area for heat transfer between the electrode and the flange. In the case where the second surface of at least one of the metal flanges is between 30 square millimeters and 2000 square millimeters, this makes it possible to provide an optimal area for heat transfer between the flange and the actively cooled plate. In the case where the first surface of at least one of the metal flanges is between 50 square millimeters and 2000 square millimeters and where the second surface of at least one of the metal flanges is between 30 square millimeters and 2000 square millimeters, to provide a combination of optimal areas for heat transfer between the electrode and the actively cooled plate. In this document, a surface is equivalent to an area, expressed in square millimeters.

[0012] According to one embodiment, at least one of the metal flanges has an L shape.

[0013] This allows for optimal thermal bonding of the flange to a horizontal plate, for efficient cooling from above or below.

[0014] According to another embodiment, at least one of the metal flanges has a C shape.

[0015] This allows for optimal thermal bonding of the flange to two horizontal plates, for efficient cooling from above and below.

[0016] According to another embodiment, at least one of the metal flanges has a U shape.

[0017] This allows for optimal thermal bonding of the flange to a vertical plate, for efficient cooling on one side.

[0018] According to one embodiment, the electrically insulating blade is formed partially or totally of a material chosen from polypropylene, polyethylene, ceramic, a fiberglass reinforced polymer, a thermoplastic material, a thermoplastic composite material, polyamide, polybutylene terephthalate and / or polycarbonate acrylonitrile butadiene styrene.

[0019] Herein, polyamide is denoted “PA”, polybutylene terephthalate is denoted “PBT” and polycarbonate acrylonitrile butadiene styrene is denoted “PC-ABS”.

[0020] Polypropylene provides adequate thermal resistance to withstand normal operating temperatures of module cells for an electric battery. This also provides optimum moisture resistance and better short circuit prevention. The use of ceramics, although brittle, provides excellent thermal resistance, with higher temperatures than polymers, of the order of 200°C. Composite materials, for example a material comprising a glass fiber reinforced polymer, allows high thermal and mechanical resistances, with properties adaptable to the specificities of the cells. In addition to their lightness, flexibility and adaptable thermal resistance, thermoplastic composite materials have the advantage of having increased resistance to corrosion. PA allows reliable electrical insulation while providing high thermal and mechanical resistances. In addition to these advantages, PBT also allows excellent dimensional stability when exposed to variable temperatures, while PC-ABS also allows it to maintain its mechanical and insulating properties by withstanding temperatures above 60 °C.

[0021] According to one embodiment, the thermal interface material is selected from a silicone-free thermally conductive adhesive, a thermally conductive adhesive comprising silicone, an adhesive comprising a thermally conductive filler, a silicone-free thermally conductive sealant, a thermally conductive sealant comprising silicone, a single-component curing adhesive without a thermally conductive filler, a two-component curing adhesive without a thermally conductive filler, a single-component curing adhesive comprising at least one thermally conductive filler, a two-component curing adhesive comprising at least one thermally conductive filler, a silicone-free thermally conductive pad and / or a thermally conductive pad comprising silicone.

[0022] This provides efficient thermal conductivity, adaptability to different types of surfaces and electrical insulation properties, thus ensuring optimal thermal management for electronic components while guaranteeing simplified application.

[0023] According to one embodiment, at least two of the slots of the electrically insulating blade each comprise an opening of substantially rectangular shape, the at least two slots being parallel to each other.

[0024] This makes it possible to optimize the volume available for connecting electrodes.

[0025] According to a second object herein, there is also provided an electric battery module comprising the cooling device according to any one of the preceding embodiments, the electric battery module further comprising the at least one sachet cell and the at least one plate, wherein at least one slot of the electrically insulating blade is traversed by the respective electrode of the at least one sachet cell, the respective electrode being in contact with the first surface of a respective metal flange among the plurality of metal flanges, the at least one second surface of the respective metal flange being covered by the thermal interface material, the thermal interface material thermally connecting the second surface of the respective metal flange to the at least one plate, the at least one electrode of the at least one sachet cell being in contact with the first surface of a respective metal flange among the plurality of metal flanges, the at least one second surface of the respective metal flange being covered by the thermal interface material, the thermal interface material thermally connecting the second surface of the respective metal flange to the at least one plate, the at least one electrode of the at least one sachet cell being in contact with the first surface of a respective metal flange among the plurality of metal flanges, the at least one electrode of ... at least one plate, the at least one plate being capable of being actively thermally regulated.

[0026] This allows one of the walls of the module to be involved in the active cooling of the electrodes.

[0027] According to a possible embodiment, the at least one plate is actively cooled by liquid.

[0028] This allows for efficient and uniform heat dissipation within the battery module, improving the thermal regulation of the cells and components. This active liquid cooling method ensures precise temperature management, thus reducing the risk of overheating and improving the durability and performance of electric batteries, while maintaining optimal energy efficiency. Active liquid cooling also helps to better manage heat peaks and maintain more stable temperatures, contributing to a longer lifespan of electric batteries.

[0029]

[0030] According to a possible embodiment, the contacting of the respective electrode with the first surface of the respective metal flange is implemented by folding the respective electrode around a respective slot among the at least one slot of the electrically insulating blade, the fold of the respective electrode being partially or totally anchored on the first surface of the respective metal flange.

[0031] This makes it possible to maximize contact between the electrode and the metal flange, while keeping them secured to each other in the event of vibrations or shocks.

[0032] According to a third object of the present invention, there is also proposed an electric battery intended to be integrated into an electric motor vehicle, said electric battery comprising an electric battery module according to any one of the embodiments of the first object of the present invention and a thermal regulation system connected to the at least one plate of the module, said thermal regulation system being capable of modifying the temperature of said at least one plate so as to regulate the temperature of the sachet cells of the electric battery module.

[0033] According to a possible embodiment, the electric battery is chosen from a lithium-ion battery, a lithium polymer battery or a lithium iron phosphate battery.

[0034] Herein, a lithium-ion battery is also referred to as a “Li-Ion” battery, a lithium polymer battery is also referred to as a “LiPo” battery, and a lithium iron phosphate battery is also referred to as a “LiFePO4” battery.

[0035] This provides different solutions for storing and supplying electrical energy for various applications, renewable, and requiring an efficient and reliable power supply.

[0036] According to a fourth object of the present invention, there is also proposed a method of manufacturing the device according to any one of the embodiments of the first object of the present invention, in which the electrically insulating blade is obtained by overmolding implemented by means of a plastic injection mold.

[0037] This simplifies the manufacturing process by reducing the risk of assembly errors due to too many components to assemble, which also reduces manufacturing costs. Overmolding allows the complete part to be formed before inserting it into the module. This also allows the shape, dimensions and material of the blade to be customized according to the needs of the application, optimizing its overall performance. The plastic provides an insulator between the cooling plate and the electrically conductive flange after the device is manufactured.

[0038] According to an embodiment of the fourth object of the present invention, at least one of the metal flanges is obtained by stamping.

[0039] This makes it easier and more precise to manufacture the device, since the metal flange can then rest directly on the thermal interface material, the thermal interface material acting as an electrical insulator. Brief description of the figures

[0040] Other characteristics, details and advantages will appear on reading the detailed description below, and on analyzing the attached drawings, in which:

[0041] [Fig. 1] is a perspective view of a cooling device and a sachet cell according to one embodiment of the invention.

[0042] [Fig.2] is a top view of a cooling device and a cell in sachet according to one embodiment of the invention.

[0043] [Fig.3] is a side view of a cooling device and a cell in sachet according to one embodiment of the invention.

[0044] Unless otherwise indicated, elements common or similar to several figures bear the same reference signs and have identical or similar characteristics, so that these common elements are generally not described again for the sake of simplicity. Description of the embodiments

[0045] A device for cooling a sachet cell of an electric battery module according to an embodiment of the present invention, such a sachet cell bag, such an electric battery module and such an electric battery are described with reference to Figures 1, 2 and 3.

[0046] These figures illustrate various components of an electric battery intended to be integrated into an electric vehicle, this electric battery providing the chemical origin of the electrical energy useful for powering the elements of this electric vehicle, including the engine of this electric vehicle. The electric battery comprises a plurality of electric battery modules, for example an electric battery module 100, these modules being connected to each other.

[0047] According to various examples, the module 100 is provided with and / or surrounded by plates, including the plate 110, called the lower plate 110, which is connectable or connected to a thermal regulation system (not shown). In general, the module 100 comprises other plates which surround it by closing it. In a non-limiting manner, the module 100 comprises six plates including the lower plate 110, forming for example a closed parallelepiped.

[0048] On the plate 110 and inside the electric battery module 100 is located at least one 100d sachet cell. Generally, the module 100 comprises a plurality of aligned sachet cells, i.e. substantially parallel to each other in the direction of their largest dimension. In the drawings, only the 100d cell is shown for illustration purposes.

[0049] In addition to maximizing the space available in the module 100 for inserting components including the sachet cells, this arrangement also makes it possible to optimize the efficiency of a thermal regulation system connectable or connected to the plates of the module 100, in particular to the plate 110, so as to regulate at the same time and uniformly the temperature of all the sachet cells, including the cell 100d located on the plate 110.

[0050] The electric battery module 100 further comprises a device 10 for cooling the sachet cells, this device being formed of an electrically insulating blade 11. This electrically insulating blade 11, which is for example rectangular in shape, is provided with one or more through slots and, in the example shown, seven slots 2a, 2b, 2c, 2d, 2e, 2f, 2g. In a non-limiting manner, these slots have the same shape, here a rectangular shape, so that the slots 2a, 2b, 2c, 2d, 2e, 2f, 2g can be distributed regularly. As illustrated, the slots 2a, 2b, 2c, 2d, 2e, 2f, 2g are for example aligned parallel to each other in one face of the electrically insulating blade 11. According to different variants not shown, these slots can be of various dimensions and orientations, and can also have shapes other than rectangular, for example trapezoids or circular holes.

[0051] On the electrically insulating blade 11 are arranged one or more metal flanges 1a, 1b, 1c, 1d, 1e, 1f, preferably in the same number as the number of bag cells that the module 100 comprises, each metal flange being arranged between two respective slots among the plurality of slots 2a, 2b, 2c, 2d, 2e, 2f, 2g. This arrangement makes it possible to better regulate the temperature of the electrodes.

[0052] Although only one sachet cell is shown here, generally speaking, a plurality of sachet cells are present. Generally speaking, each of the slots 2a, 2b, 2c, 2d, 2e, 2f, 2g of the electrically insulating blade 11a has a shape and dimensions adapted to allow the passage of an electrode of a respective sachet cell of the module 100. Regularly distributed rectangular slots thus allow the passage of electrodes of sachet cells arranged in the same way in the module 100 or on the plate 110. This arrangement makes it possible to optimize the volume of the cooling device. It is thus possible to reduce the mass of the module.

[0053] In a non-limiting manner, each of the slots 2a, 2b, 2c, 2d, 2e, 2f, 2g is designed to be crossed by at least one respective electrode of one of the sachet cells. This “comb”-shaped arrangement of the slots 2a, 2b, 2c, 2d, 2e, 2f, 2g of the electrically insulating blade(s) 11 of the cooling device 10 makes it possible to pass through the latter one, several or all of the electrodes of the sachet cells that a given battery module 100 may comprise.

[0054] Each of the metal flanges, which is for example formed of copper or aluminum, has a folded shape and comprises two surfaces. These two surfaces are located on either side of a given metal flange. As illustrated, a first of these two surfaces of the metal flange Id is adapted to be in contact with the electrode 4d of the cell 100d, this electrode 4d passing through the respective slot 2d. On the other side of the same metal flange Id, a second surface is provided to be in contact with the plate 110.

[0055] The second surface of at least one metal flange is covered by a 3d thermal interface material which is adapted to thermally connect this second surface of the metal flange Id to the plate 110. The plate 110 is adapted to be actively thermally regulated. The contact between the second surface of the metal flange Id with the plate 110 is indirect in that the 3d thermal interface material defines a layer separating the metal flange Id and the plate 110.

[0056] This effect of the thermal interface material 3d of thermally connecting the second surface of the metal flange Id to the plate 110, and therefore the first surface of the metal flange Id intended to be in contact with the electrode 4d of the cell 100d allows, when the electrode 4d is in contact with the first surface, to create a heat-conducting link between the two surfaces to allow an efficient transfer of Heat. The use of a specific material placed between each metal flange and the plate adapted to be actively cooled in a battery module ensures efficient cooling, thus preventing the battery from overheating. The material acts as a thermal conductor, transferring heat efficiently to maintain an optimal temperature in the module and in the battery.

[0057] Advantageously, it has been observed that the choice of certain values ​​of the areas defining the first surface and the second surface of the metal flanges makes it possible to ensure a particularly efficient heat transfer by the cooling device 10 used for one or more sachet cells of an electric battery module. When the first surface of at least one of the metal flanges is between 50 square millimeters and 2000 square millimeters, for example 100 or 1000 square millimeters, optimal heat dissipation towards the plate of the electric battery module is obtained. When the second surface of at least one of the metal flanges is between 30 square millimeters and 2000 square millimeters, for example between 40 and 1500 square millimeters, an easier thermal connection with the plate of the electric battery module and good heat dissipation are obtained.By combining these choices of values, on the one hand for the first surface and on the other hand for the second surface, for example a first surface of 70 square millimeters in contact with the electrode and a second surface of 50 square millimeters covered with a thermal interface material, thus ensuring a double functionality of heat dissipation, an ideal balance of the two heat transfers is obtained, ensuring efficient heat dissipation from the electrode to the actively cooled plate.

[0058] Advantageously and according to a possible embodiment, the metal flanges 1a, 1b, 1c, 1d, 1c, 1f have a folded or curved structure, for example in the shape of an L.

[0059] Herein, an L-shaped or "L"-shaped metal flange is a metal flange that has an angular configuration where a first portion of the flange extends in a first direction, called horizontal, while a second portion projects in a second direction, called vertical and perpendicular to the horizontal direction, thus forming an L-shaped structure. In particular, this L-shaped structure is such that the first surface of the corresponding metal flange is larger than the second surface of this same metal flange. In the present case, the possible contact surface between the metal flange Id and the electrode 4d is therefore larger than the possible contact surface between the metal flange Id and the thermal interface material 3d.An “L” shaped flange provides optimal thermal bonding with a horizontal plate, promoting efficient cooling from above or below through an angled configuration that maximizes the contact surface with the plate.

[0060] Advantageously and according to a possible embodiment, all the metal flanges 1a, 1b, 1c, 1d, 1c, 1f or a part of them can also be C-shaped. Herein, a "C"-shaped metal flange is a metal flange which has a configuration where a first part of the flange extends in a first direction, called vertical, while two other secondary parts each project from one end of the first part in a second direction, called horizontal, and perpendicular to the first vertical direction, thus forming a flange open towards the outside and the two secondary parts of which are parallel to each other, defining a pair of corresponding second parallel surfaces, on which a pair of thermal interface materials can be used, or even different thermal interface materials.

[0061] A "C" shaped flange provides optimal thermal bonding with two horizontal plates, promoting efficient cooling above and below the pouch cell, while exploiting the projecting secondary portions for better heat dissipation.

[0062] Advantageously and according to a possible embodiment, all the metal flanges 1a, 1b, 1c, 1d, 1c, 1f or a part of them can also be U-shaped. Herein, a "U"-shaped metal flange is a metal flange which has a configuration where a first part of the flange extends in a first direction, called horizontal, while two other secondary parts each project from one end of the first part in a second direction, called vertical, and perpendicular to the first horizontal direction, thus forming an upwardly open flange and the two secondary parts of which are parallel to each other. One of the two secondary parts, vertical, is located on the electrically insulating blade 11 of the cooling device 10, defining a first corresponding surface in the vicinity of a respective one.The first, horizontal, part and the other secondary, vertical part define in this case a pair of second surfaces corresponding and transverse to each other, on which a pair of thermal interface materials can be used, or even different thermal interface materials.

[0063] A "U" shaped flange provides an optimal thermal connection with a vertical plate and a horizontal plate, allowing cooling by means of two plates transverse to each other, thanks to these secondary parts transverse to each other, thus promoting efficient heat dissipation.

[0064]

[0065] According to a possible embodiment, different materials can be used to form the electrically insulating blade 11 of the cooling device 10. Advantageously, it has been observed that the choice of polyamide, noted “PA”, of polybutylene terephthalate, denoted “PBT” and / or polycarbonate acrylonitrile butadiene styrene, denoted “PC-ABS”, provides particularly high thermal and mechanical resistance for a cooling device for a sachet cell.

[0066] For example, in the configurations described herein, "PA" provides robust mechanical strength and good electrical insulation between the electrodes of different pouch cells aligned with and in close proximity to each other, reducing the risk of electrical short circuits. In the example of an electrically insulating blade comprising "PBT", it is observed that heat transfer between the electrodes and the metal flanges is facilitated, which contributes to more efficient heat dissipation. In the case of "PC-ABS", the electrically insulating blade exhibits an optimal compromise between heat dissipation and mechanical impact resistance, which is particularly advantageous for use within an electric battery module for an electric vehicle.

[0067] Advantageously and according to a possible embodiment, the type of thermal interface material(s) 3a, 3b, 3c, 3d, 3e, 3f is chosen to ensure maximum thermal conductivity. For example, a thermal interface material consists of a thermally conductive adhesive, which can be formulated with or without silicone, in order to ensure both a mechanical bond and optimal thermal conductivity. It can also be a two-part adhesive incorporating thermally conductive fillers.

[0068] Furthermore, an example of a suitable thermal interface material may be in the form of a thermally conductive glue or a thermally conductive sealant, based on one or more moisture-activatable components and containing thermally conductive fillers.

[0069] Yet another alternative thermal interface material may be in the form of a thermally conductive pad or cushion, which may or may not also contain silicone. This pad or cushion provides effective thermal conductivity while being suitable for various applications.

[0070] The preceding embodiments and the described variants can be directly applied to the case of an electric battery module 100 comprising a cooling device 10. By passing the respective electrodes of each sachet cell through a corresponding slot, each of these electrodes can be brought into contact with the first surface of a respective metal flange to allow heat transfer.

[0071] Advantageously and according to a possible embodiment, contact of each respective electrode with a first surface of the respective metal flange can be made by folding or refolding this respective electrode around the slot. As an illustrative example for a sachet cell lOOd, one of its electrodes 4d can be inclined or flexed on the edge of the respective slot 2d located near this sachet cell lOOd, to make it bend or curve and bring it into contact with the respective metal flange Id located on the electrically insulating blade 11. A fold of the respective electrode 4d is thus produced on the first surface of the respective metal flange Id, in order to achieve partial or total anchoring. This folding can be done for all the electrodes of each sachet cell.

[0072] Advantageously and according to a possible embodiment, the mounting of a plurality of sachet cells on one or more plates, for example the plate 110, which can be connected with an active cooling system, allows the metal flanges 1a, 1b, 1c, 1d, 1e, 1f of the electrically insulating blade 11 to transfer the heat coming from the electrodes of the cells to corresponding thermal interface materials 3a, 3b, 3c, 3d, 3e, 3f on these metal flanges, which in turn are in contact with at least one plate, allows active and efficient cooling.

[0073] Advantageously and according to a possible embodiment, active liquid cooling of the plate 110 or the plates of the electric battery module 100 makes it possible to maintain the electrodes of the sachet cells at safe and optimal operating temperatures. The modules comprising these sachet cells and / or the batteries comprising these modules generate heat during charging, discharging and during periods of intense use, the circulation of a liquid such as a heat transfer liquid, for example a water-glycol mixture or demineralized water, in plates of these modules or in contact with such plates, makes it possible to provide active cooling.For example, a heat transfer fluid circulating through conduits integrated in the conductive plate allows the heat transferred by the second surface of the metal flanges 1a, 1b, 1c, 1d, 1e, 1f to be absorbed by means of the thermal interface materials 3a, 3b, 3c, 3d, 3e, 3f, and is then directed to a heat exchanger where the heat is dissipated. The application of a continuous cycle allows the cells to be maintained at appropriate temperatures to ensure optimal operation.

[0074] Advantageously and according to a possible embodiment, a thermal regulation system (not shown) can be connected to the plate 110 or to any plate of the module, in order to modify and / or regulate the temperature of this plate.

[0075] For example, in the case of an electric battery module 100 suitable for use in an electric vehicle, such a thermal regulation system may comprise thermal sensors connected to the plate 110. These sensors make it possible to ensure constant monitoring of the temperature of the bagged cells and / or to communicate with an automated control system. Depending on pre-established parameters of the cooling device 10 and / or the electric battery module 100, it is thus It is possible to precisely adjust the flow of coolant through conduits integrated into the plate, thus providing dynamic control of cell temperature depending on loads, external conditions and / or vehicle use. This also makes it possible to maintain the cells at desired temperature levels while avoiding the risks of overheating linked to rapid charging or intensive use of the electric vehicle.

[0076] Advantageously and economically, a simple and rapid manufacture of the cooling device 10 can be carried out according to different embodiments. For this, and starting from a choice of an insulating material suitable for ensuring electrical insulation between the electrodes of sachet cells, a shaping of electrically insulating blades can be implemented with a thickness and slots of sizes capable of subsequently facilitating the connection with electrodes of sachet cells.

[0077] For example, overmolding of the electrically insulating blade 11 may be carried out using a plastic injection mold. One or more plastic injection molds may be designed depending on the type of electrically insulating blade 11 desired. This or these molds comprise, for example, cavities corresponding to the shape of the electrodes of the sachet cells in the electric battery module. An injection of liquid plastic into the mold then makes it possible to form the electrically insulating blade 11 with specific slots, the injected plastic then being cooled to solidify and form the structure of the blade with the slots.

[0078] According to a possible embodiment, by repeating these steps, this manufacturing method makes it possible to obtain a plurality of electrically insulating blades, on which the metal flanges can be added. The assembly of an electrically insulating blade 11 on a plate 110 by connecting the metal flanges 1a, 1b, 1c, 1d, 1c, 1f can be implemented simultaneously or successively, while the passage of the electrodes of the sachet cells through the slots of an electrically insulating blade 11 makes it possible to connect the cell or cells to the metal flanges while maintaining reliable electrical insulation. This promotes efficient thermal transfer of heat from the sachet cells to the plate while preserving the electrical integrity of the sachet cells.

[0079] According to a possible embodiment, a connection or bonding of metal flanges with an electrically insulating blade 11 can be made by different means such as welding, brazing, the use of adhesives or mechanical fasteners. The metal flanges 1a, 1b, 1c, 1d, 1c, 1f can also simply be brought into contact with the blades or be arranged sufficiently close.

[0080] According to a possible embodiment and advantageously, the manufacture itself of the metal flanges 1a, 1b, 1c, 1d, 1c, 1f is preferably done by stamping, for example from metal sheets selected according to their thickness and mechanical strength. Stamping can then be carried out using corresponding dies in order to precisely cut these metal flanges, for example to guarantee uniform dimensions in order to facilitate their connection with a given type of bag cell electrodes.

[0081] This allows advantageous manufacturing in terms of dimensional accuracy, speed of production and integration of the metal flanges 1a, 1b, 1c, 1d, 1c, 1f in the cooling device 10.

[0082] The present invention has been described above with reference to the limited embodiments and drawings, the present invention is not limited thereto, and the present invention is not limited thereto by any of the ordinary skills in the prior art to which the present invention relates. Various modifications within the scope of the technical idea of ​​the invention and the claims are described below and may be distorted.

Claims

Claims

1. Cooling device (10) for at least one bagged cell (100d) of an electric battery module (100), the cooling device (10) comprising: - an electrically insulating blade (11) and provided with a plurality of slots (2a, 2b, 2c, 2d, 2e, 2f, 2g), each slot being designed to be crossed by a respective electrode (4d) of the at least one bagged cell (100d), and - a plurality of metal flanges (1a, 1b, 1e, 1d, 1e, If), each metal flange (1a, 1b, 1e, 1d, 1e, If) being arranged between two slots of the plurality of slots (2a, 2b, 2c, 2d, 2e, 2f, 2g) and comprising, on the one hand, a first surface adapted to be in contact with the electrode (4d) passing through the respective slot and, on the other hand, at least one second surface covered by a thermal interface material (3a, 3b, 3c, 3d, 3e, 3f), the thermal interface material (3a, 3b, 3c, 3d, 3e,3f) being adapted to thermally connect the second surface of the metal flange (la, 1b, le, Id, le, If) to at least one plate (110) of the electric battery module (100), said plate (110) being able to be thermally regulated actively.,

2. Cooling device (10) according to claim 1, wherein the first surface area of ​​at least one of the metal flanges (la, 1b, le, Id, le, If) is between 50 square millimeters and 2000 square millimeters and / or wherein the second surface area of ​​at least one of the metal flanges (la, 1b, le, Id, le, If) is between 30 square millimeters and 2000 square millimeters.

3. Cooling device (10) according to one of claims 1 or 2, wherein at least one of the metal flanges (la, 1b, le, Id, le, If) has an L shape.

4. Cooling device (10) according to one of claims 1 or 2, wherein at least one of the metal flanges (la, 1b, le, Id, le, If) has a C shape.

5. Cooling device (10) according to one of claims 1 or 2, wherein at least one of the metal flanges (la, 1b, le, Id, le, If) has a U shape.

6. A cooling device (10) according to any preceding claim, wherein the electrically insulating (11) is formed partially or totally of a material selected from polypropylene, polyethylene, ceramic, a fiberglass reinforced polymer, a thermoplastic material, a thermoplastic composite material, polyamide, polybutylene terephthalate and / or polycarbonate acrylonitrile butadiene styrene.

7. A cooling device (10) according to any preceding claim, wherein the thermal interface material is selected from a silicone-free thermally conductive adhesive, a thermally conductive adhesive comprising silicone, an adhesive comprising a thermally conductive filler, a silicone-free thermally conductive sealant, a thermally conductive sealant comprising silicone, a one-part curing adhesive without a thermally conductive filler, a two-part curing adhesive without a thermally conductive filler, a one-part curing adhesive comprising at least one thermally conductive filler, a two-part curing adhesive comprising at least one thermally conductive filler, a silicone-free thermally conductive pad and / or a thermally conductive pad comprising silicone.

8. A cooling device (10) according to any preceding claim, wherein at least two of the slots (2a, 2b, 2c, 2d, 2e, 2f, 2g) of the electrically insulating blade (11) each comprise an opening of substantially rectangular shape, the at least two slots being parallel to each other.

9. An electric battery module (100) comprising the cooling device (10) according to any one of the preceding claims, the electric battery module (100) further comprising the at least one sachet cell (100d) and the at least one plate (110), wherein at least one slot (2a, 2b, 2c, 2d, 2e, 2f, 2g) of the electrically insulating blade (11) is traversed by the respective electrode (4d) of the at least one sachet cell (100d), the respective electrode (4d) being in contact with the first surface of a respective metal flange (1d) among the plurality of metal flanges (1a, 1b, 1c, 1d, 1e, 1f), the at least one second surface of the respective metal flange (1d) being covered by the thermal interface material (3d), the thermal interface material (3d) thermally connecting the second surface of the metal flange respective (Id) to the at least one plate (110), the at least one plate (110) being capable of being thermally regulated actively.

10. An electric battery module (100) according to claim 9, wherein the contacting of the respective electrode (4d) with the first surface of the respective metal flange (Id) is implemented by folding the respective electrode (4d) around a respective slot (2d) among the at least one slot (2a, 2b, 2c, 2d, 2e, 2f, 2g) of the electrically insulating blade (11), the folding of the respective electrode (4d) being partially or totally anchored on the first surface of the respective metal flange (Id).

11. Electric battery intended to be integrated into an electric motor vehicle, said electric battery comprising an electric battery module (100) according to any one of claims 9 to 10 and a thermal regulation system connected to the at least one plate (110) of the module, said thermal regulation system being capable of modifying the temperature of said at least one plate so as to regulate the temperature of the sachet cells (100d) of the electric battery module (100).

12. Method of manufacturing the device according to any one of claims 1 to 8, in which the electrically insulating blade (11) is obtained by overmolding carried out using a plastic injection mold.

13. A method of manufacturing the device according to claim 12, wherein at least one of the metal flanges (la, 1b, le, Id, le, If) is obtained by stamping.

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