Battery assembly for an electric vehicle, said battery assembly comprising a housing for the circulation of a heat transfer fluid

Abstract

The assembly (100) for an electric vehicle battery comprises: a support device (101) defining a metallic enclosure (102) for receiving a heat transfer fluid (10), the metallic enclosure (102) comprising an inlet (103) and an outlet (104) for the circulation of the heat transfer fluid (10) through the metallic enclosure (102); battery cells (105), each comprising a rigid outer casing (106), said battery cells (105) being mounted in a sealed manner to the metallic enclosure (102) such that each has a first portion (107) extending into the metallic enclosure (102) and a second portion (108) extending outside the metallic enclosure (102). Figure to be published with the abbreviation: Fig. 1

Description

Title of the invention: Battery assembly for an electric vehicle, said battery assembly comprising a housing for the circulation of a heat transfer fluid. Technical field of the invention

[0001] The technical field of the present invention relates to the thermal management of electric vehicle batteries. More particularly, the invention relates to an assembly for an electric vehicle battery, said battery assembly comprising a support device defining a metallic enclosure intended to receive a heat transfer fluid. Prior art

[0002] Electric batteries intended to equip electric vehicles comprise many electric cells, also called battery cells.

[0003] For optimal operation, the battery cells are maintained within a predetermined temperature range.

[0004] Thus, the thermal management of battery cells can consist of cooling the battery cells or, on the contrary, heating them.

[0005] Thermal management of battery cells in a battery module is therefore a major issue.

[0006] Among existing thermal management techniques, one involves immersing the battery cells in a temperature-controlled liquid; such a liquid is also called a heat transfer fluid. Thus, the battery cells in the battery module are in direct contact with the heat transfer fluid.

[0007] This thermal management by immersion is particularly effective. Indeed, it allows for better heat transfer through direct contact of the heat transfer fluid with the battery cells, and enables thermal control in areas of said battery cells that may be difficult to access otherwise.

[0008] Thermal management by immersion requires control of the sealing within the battery in which the battery cells are arranged.

[0009] This type of thermal management faces several difficulties. Long-term sealing remains one of them. Another difficulty lies in the ongoing desire to simplify battery architecture by eliminating the use of battery modules, which makes thermal management by immersion even more risky.

[0010] The invention aims to provide a long-term watertight architecture. According to a particular development, the invention also aims to provide an architecture that eliminates the need for battery modules. Object of the invention

[0011] The present invention aims to improve the thermal management of a battery, in particular by proposing a sealed architecture over the long term.

[0012] To this end, the invention relates to an assembly for an electric vehicle battery, said battery assembly comprising: • a support device defining a metallic enclosure intended to receive a heat transfer fluid, the metallic enclosure comprising an inlet and an outlet intended for the circulation of the heat transfer fluid through the metallic enclosure; • battery cells each comprising a rigid outer casing, said battery cells each being mounted in a hermetically sealed manner to the metallic enclosure so as each has a first part extending into the metallic enclosure and a second part extending out of the metallic enclosure.

[0013] The battery assembly may further include one or more of the following features.

[0014] According to a feature of the battery assembly, each battery cell comprises a first positive polarity surface and a second negative polarity surface, and, for each battery cell, the second part of said battery cell comprises the first surface and the second surface.

[0015] According to a feature of the battery assembly, the mounting of each battery cell to the metal enclosure is achieved by melting at least one metal, for example the mounting of each battery cell to the metal enclosure is a welding or brazing mounting.

[0016] According to a feature of the battery assembly, the metal is a filler metal arranged, following its melting, at a junction between the outer casing of the battery cell and the metal enclosure, so that the junction is watertight.

[0017] According to a feature of the battery assembly, the support device includes housings, each housing receiving and holding, in a predetermined position, one of the battery cells.

[0018] According to a feature of the battery assembly, the support device is manufactured as a single piece.

[0019] According to a feature of the battery assembly, the metal enclosure is electrically connected to an anode of each of the battery cells.

[0020] The invention also relates to a battery module comprising a battery assembly as described.

[0021] The invention also relates to a battery for an electric vehicle comprising an external structure adapted to be fixed to the chassis of an electric vehicle, said battery comprising: • a plurality of battery modules as described arranged inside the external structure; or • at least one battery assembly as described arranged inside the external structure.

[0022] The invention also relates to a thermal management system comprising a battery as described, said thermal management system comprising: • a closed fluidic circuit connected fluidically to the inlet and outlet of the metallic enclosure or each of the metallic enclosures; • a heat transfer fluid suitable for circulating in the fluidic circuit; • means of measuring the temperature of the heat transfer fluid; • a pump configured to move the heat transfer fluid in the fluidic circuit; • a computer management device configured to receive data from temperature measurement devices and configured to control the pump. Brief description of the drawings

[0023] The invention will be better understood upon reading the detailed description that follows, given solely by way of non-limiting example and made with reference to the attached drawings listed below.

[0024] Fig. 1 schematically represents a cross-sectional view of an assembly for an electric vehicle battery according to a particular embodiment of the invention.

[0025] Fig. 2 schematically represents a cross-sectional view of a battery module integrating the assembly for an electric vehicle battery.

[0026] Fig. 3 schematically represents a battery incorporating several battery assemblies or several battery modules.

[0027] Figure 4 schematically illustrates a thermal management system including the battery.

[0028] In these figures, the same reference numerals are used to designate the same elements. The elements shown in the different figures are not necessarily drawn to scale in order to facilitate understanding of the figures. Detailed description

[0029] The invention relates to an assembly 100 for an electric vehicle battery, a particular embodiment of this assembly 100 for a battery is illustrated by way of example in figures 1 and 2.

[0030] In particular, the battery assembly 100 includes a support device 101 defining a metallic enclosure 102 intended to receive a heat transfer fluid 10.

[0031] The metallic enclosure 102 includes an inlet 103, also called the heat transfer fluid inlet 103, and an outlet 104, also called the heat transfer fluid outlet 104, intended for (i.e. in particular intended to allow / authorize) the circulation of the heat transfer fluid 10 through the metallic enclosure 102.

[0032] Thus, the metallic enclosure 102 can have an internal volume that contributes to defining an internal volume of heat transfer fluid circulation between the inlet 103 and the outlet 104. In other words, the internal volume of heat transfer fluid circulation in the metallic enclosure 102 is included in the internal volume of the metallic enclosure 102.

[0033] The battery assembly 100 comprises battery cells 105. By way of example, six battery cells 105 are visible in Figures 1 and 2. Each battery cell 105 comprises a rigid outer casing 106, the rigidity of the outer casing 106 being adapted to protect the internal components of the battery cell 105.

[0034] The battery cells 105 are each mounted in a sealed manner to the metal enclosure 102 such that each has a first portion 107 extending into the metal enclosure 102 (i.e., within the internal volume of the metal enclosure 102) and a second portion 108 extending outside the metal enclosure 102. In other words, the internal volume of the heat transfer fluid circulation can correspond to the internal volume of the metal enclosure 102 less at least the volumes occupied by the first portions 107 of the battery cells 105 within the internal volume of the metal enclosure 102.

[0035] Such a battery assembly 100 allows the temperature of the battery cells 105 to be controlled, for example by cooling or heating them, via the heat transfer fluid 10 which interacts with the first parts 107 of the battery cells 105 when the heat transfer fluid 10 circulates through the metal enclosure 102. The metal enclosure 102 has the advantage of forming a robust solution in terms of both sealing and mechanical resistance for holding the battery cells 105, each of which passes through a wall of the metal enclosure 102.

[0036] The role of the support device 101 is of course to participate in the support of the battery cells 105 which are attached to it in particular via their airtight mounting to the metallic enclosure 102.

[0037] By "the battery cells 105 are each mounted in a sealed manner to the metallic enclosure 102", it is understood that the sealing here opposes the passage of the heat transfer fluid 10 at the interfaces / junctions between the battery cells 105 and the metallic enclosure 102.

[0038] Each battery cell 105 is of the type to be charged and discharged many times during the life cycle of the electric vehicle comprising a battery 1 including said battery assembly 100.

[0039] Each battery cell 105 can be of the cylindrical type with electrode windings placed in the rigid outer casing 106. The wound electrodes, separated by separators in a manner known per se, form at least in part the aforementioned internal components.

[0040] The rigid outer casing 106 of each battery cell 105 may comprise: • a hollow body, for example cylindrical, in particular electrically conductive, in which is arranged the winding of electrodes and an electrolyte of said battery cell 105; • a cover, in particular one that is wholly or partly electrically conductive, mounted at one end of the hollow body, this cover being wholly or partly electrically insulated from the hollow body.

[0041] Each battery cell 105 conventionally comprises a positive terminal (cathode), in particular formed in whole or in part by the cover, and a negative terminal (anode) in particular formed by the hollow body which may be made of metal.

[0042] The electric vehicle, in particular of the electric motor vehicle type, comprises a battery 1, including in particular one or more battery assemblies 100 as described, and at least one electric motor electrically powered by the battery 1. The electric vehicle is configured so that at least one wheel of the electric vehicle is driven by said at least one electric motor. Thus, within the family of electric vehicles, it is possible to find, for example, plug-in hybrid vehicles or non-plug-in hybrid vehicles, and 100% electric vehicles, whether front-wheel drive, rear-wheel drive, or four-wheel drive.

[0043] The heat transfer fluid 10 is, in particular, a dielectric fluid. The heat transfer fluid 10 is, in particular, a dielectric liquid. It then makes contact with the battery cells 105 in the metallic enclosure 102 to interact thermally with these battery cells 105 but without interacting electrically with them.

[0044] Preferably, each battery cell 105 comprises a first surface 109 of positive polarity and a second surface 110 of negative polarity. These first and second surfaces 109, 110 allow, in particular, for suitable contact re-establishment. to form the desired electrical diagram of battery 1. In other words, the first surface 109 of positive polarity can form at least in part the positive terminal and the second surface 110 of negative polarity can form at least in part the negative terminal.

[0045] Due to the partial insertion of each of the battery cells 105 into the metallic enclosure 102, there is a problem with accessing the first and second surfaces 109, 110, particularly for electrically connecting the battery cells 105 to each other in a suitable manner. To this end, for each battery cell 105, the second portion 108 of said battery cell 105 preferably comprises the first surface 109 and the second surface 110.

[0046] This allows the electrical contacts of the battery cells 105 to be taken out of the metallic enclosure 102, for example in order to connect these battery cells 105 selectively to a battery charging system 1 or to at least one electric motor of the electric vehicle.

[0047] As illustrated in [Fig. 1], the second part 108 of each battery cell 105 comprises the first and second surfaces 109, 110, which allows for easy re-establishment of contact from outside the metallic enclosure 102 for each battery cell 105. This can be achieved by having the hollow body, which then includes the second surface 110, have negative polarity (forming the negative terminal / anode of the corresponding battery cell 105) and the cover, which then includes the first surface 109, have positive polarity (forming the positive terminal / cathode of the corresponding battery cell 105). In this case, the first surface 109 can correspond to the surface of the cover facing outwards from the corresponding battery cell 105, and the second surface 110 can correspond to a portion of the external surface of the hollow body of the corresponding battery cell 105.

[0048] It follows from what has been described above that there is a need to obtain a satisfactory seal between each of the battery cells 105 and the metallic enclosure 102 in particular to avoid the loss of heat transfer fluid 10 which should only be able to enter the metallic enclosure 102 through the inlet 103 and only exit through the outlet 104.

[0049] For this purpose, the mounting of each battery cell 105 to the metallic enclosure 102 can be obtained by melting at least one metal 111. For example, said at least one metal 111 can be from the battery cell 105, from the metallic enclosure 102, or be a specific filler metal.

[0050] This makes it possible to obtain satisfactory sealing, preferably while allowing, where applicable, electrical continuity between the battery cells 105 and the metallic enclosure 102 in the sense that the mounting of each battery cell 105 can allow the hollow body of said battery cell 105, therefore advantageously the case The second surface 110 is to be electrically continuous with the metallic enclosure 102. Furthermore, the use of said at least one metal 111 also allows for good thermal conduction between the metallic enclosure 102 and the battery cell 105, thus contributing to the thermal regulation of the battery cells 105.

[0051] More particularly, the mounting of each battery cell 105 to the metal enclosure 102 can be a mounting by welding or brazing, for example using a filler metal as said at least one metal 111.

[0052] It is thus possible to choose appropriately the filler metal to ensure the brazing or welding whose function is to hold the battery cell 105 concerned to the metallic enclosure 102 (support function) while ensuring the sealing of the metallic enclosure 102 at its interfaces with the battery cells 105.

[0053] In other words, said at least one metal 111 can be a filler metal arranged, after its melting, on / at a junction between the outer casing 106 (in particular the hollow body) of the battery cell 105 and the metallic enclosure 102, so that the junction is sealed. This seal prevents the passage of the heat transfer fluid 10 through the junction during the circulation of the heat transfer fluid 10 in the metallic enclosure 102. This can notably be the case for each battery cell 105.

[0054] In the case of a welded assembly, it is possible that the assembly of the corresponding battery cell 105, and in particular for each of the battery cells 105, with the metallic enclosure 102 is obtained: • by melting a fraction of metal from the metallic enclosure 102 and a fraction of metal from the battery cell 105 (in particular from the hollow body of the battery cell 105), this is a weld obtained between two base metals (forming two metals 111) respectively from the metallic enclosure 102 and the battery cell 105; • by melting a filler metal 111 and a fraction of metal from the metallic enclosure 102 or the battery cell 105 (in particular from the hollow body of the battery cell 105), this is a weld obtained between a filler metal and a base metal from the metallic enclosure 102, or from the battery cell 105.

[0055] In the case of a brazing assembly, the filler metal 111 is melted, which makes it possible to fix the corresponding battery cell 105 to the metal enclosure 102 in a hermetic manner, via a bead formed by this filler metal 111, without locally degrading the material of the metal enclosure 102 and the material of the battery cell 105 at the corresponding junction.

[0056] For example, the metal enclosure 102 can be made of 304 stainless steel, also called AISI 304.

[0057] A person skilled in the art is able to choose the metal(s) (base and, where applicable, filler metal) according to the assembly to be obtained, for example, by welding or brazing. Naturally, a person skilled in the art is also able to choose the material of the battery cells 105 (in particular their hollow body) and the material of the metal enclosure 102 suitable for the desired assembly, and in particular for the desired brazing or welding.

[0058] In fact, for each battery cell 105 to be mounted on the metal enclosure 102, the metal enclosure 102 may include an opening into which said battery cell 105 is inserted. After insertion, the battery cell 105 is fixed (in particular by welding or brazing) to the opening so as to completely seal the opening in a hermetic manner to prevent any leakage of heat transfer fluid through this opening. In particular, for this purpose, the filler metal 111 may form an annular bead at the interface / junction between the corresponding opening and the corresponding battery cell 105 (and more particularly the body of the corresponding battery cell 105).

[0059] The melting of said at least one metal 111 can be achieved / obtained via the use of a laser.

[0060] In figures 1 to 2, reference 111 shows, at the level of each battery cell 105, said at least one metal after its melting in a state where it ensures, or participates in ensuring, the seal between said battery cell 105 and the metallic enclosure 102.

[0061] According to a particular embodiment, for example as illustrated in [Fig. 1], the battery assembly 100, and more particularly the support device 101, may comprise housings 112, each housing 112 receiving and holding, in a predetermined position, one of the battery cells 105. This facilitates the assembly of the battery assembly 100, in particular by helping to hold the battery cells 105, for example during the corresponding welding or brazing.

[0062] In particular, the housings 112 are arranged in the metallic enclosure 102. The internal volume of heat transfer fluid circulation can then correspond to the internal volume of the metallic enclosure 102 less the volumes occupied in the internal volume of the metallic enclosure 102 by the first parts 107 of the battery cells 105 and the housings 112. [Fig. 1] shows a simple example of housings 112; any other shape of housing 112 can of course be used as long as it performs the required function while allowing the heat transfer fluid 10 to come into contact with the first parts 107 of the battery cells 105.

[0063] Each battery cell 105 can be partially inserted into one of the corresponding housings 112.

[0064] The support device 101, and in particular the metal enclosure 102, can be manufactured in one piece.

[0065] This facilitates the assembly of the battery assembly 100 and thus the production of batteries. In addition, it improves the sealing of the metal enclosure 102 mounted on the battery cells 105.

[0066] In particular, the metallic enclosure 102 includes a wall separating its internal volume from its external volume, this wall being passed through in a sealed manner by the battery cells 105.

[0067] To manufacture the support device 101 and therefore the enclosure 102, where appropriate associated with the housings 112, all in one piece, suitable molding techniques such as sand molding can be used.

[0068] It follows from what has been described above that each battery cell 105 can be electrically connected to the metal enclosure 102. This allows, for example, the first surfaces 109 or the second surfaces 110 of the battery cells 105 to be electrically connected to the metal enclosure 102, thus simplifying the electrical connections because a single contact on the metal enclosure 102 forms a connection terminal to all the battery cells 105, preferably to their negative pole / negative terminal.

[0069] In other words, the metallic enclosure 102 can be electrically connected to an anode (for example, formed by the hollow body) of each of the battery cells 105. This simplifies the electrical connections of the battery cells 105 in the formation of the battery 1. This connection to the anode can be achieved by mounting the corresponding battery cell 105 to the metallic enclosure 102.

[0070] The invention also relates to a battery module 200 comprising a battery assembly 100 as described, and an example of an embodiment of which is illustrated in [Fig.2].

[0071] This allows for easy integration within an electric vehicle whose electrical architecture is formed by an association of 200 battery modules. Thus, such a 200 battery module can be associated with one or more other 200 battery modules in a modular fashion to form a battery pack.

[0072] Conventionally, the battery module 200 comprises several battery cells 105 electrically connected to each other according to a predetermined electrical scheme, and an output interface 201; in the present case, the battery module 200 comprises the entire battery assembly 200. This output interface 201 is electrically connected internally to the battery cells 105, for example via connectors 202, 203, 204, and is intended to be connected to one or more other battery modules 200 to form a battery, also then called a battery pack, associated in particular with a system thermal management and a BMS (abbreviation from the Anglo-Saxon "Battery Management System" and corresponding to battery management system).

[0073] The invention also relates to the battery 1, also called an electric battery, for an electric vehicle for example, as shown in [Fig. 3]. This battery 1 comprises an external structure 2 adapted to be fixed to a chassis of the electric vehicle, said battery 1 comprising: • a plurality of 200 battery modules as described arranged inside the outer structure 2; or • at least one set 100 for battery as described arranged inside the outer structure 2.

[0074] The metallic enclosure 102, being watertight, can easily be directly arranged within the battery 1, with or without battery modules 200, while simplifying fluid management and limiting losses in case of leakage. When battery modules 200 are present, the modularity of the battery 1 makes it easier to detect a fault and disable a specific battery module 200 while still allowing the electric vehicle to operate in a degraded mode.

[0075] Within the battery 1, all or part of the battery cells 105 can be connected together according to a predetermined electrical scheme.

[0076] In particular, within battery 1, the or each metallic enclosure 102 contains, in an operating configuration of said battery 1, the heat transfer fluid 10.

[0077] The battery 1 may comprise a single battery assembly 100 of a size suitable for the battery 1 to have a desired energy capacity (in kWh) or a plurality of battery assemblies 100 arranged in a suitable manner to facilitate the integration of the battery 1 within the electric vehicle.

[0078] Furthermore, the invention also relates to a thermal management system 41 comprising the battery 1 as described. The thermal management system 41 is illustrated, for example, in [Fig. 4]. The thermal management system 41 comprises: • a closed fluidic circuit 44 connected in a fluidic manner: • at the inlet 103 and outlet 104 of the metallic enclosure 102; or • at input 103 and output 104 of each of the speakers 102 metallic; • the heat transfer fluid 10 suitable for circulating in the fluidic circuit 44; • means 42 for measuring the temperature of the heat transfer fluid 10; • a pump 43 configured to move the heat transfer fluid 10 in the fluidic circuit 44; • a computer management device 45 configured to receive data from the temperature measurement means 42 and configured to control the pump 43, for example to put into circulation, and where appropriate to adjust the circulation flow rate, of the heat transfer fluid 10 in the fluidic circuit 44 and therefore in the assembly or assemblies 100 for the battery. In particular, the means 42 for measuring the temperature of the heat transfer fluid 10 are arranged to measure temperatures of the heat transfer fluid 10 allowing to deduce a behavior of the operation of the pump 43 allowing to act appropriately on the temperature of the battery cells 105.

[0079] Such a thermal management system 41 is particularly suitable for ensuring the thermal management of battery cells 105 in a robust and efficient manner.

[0080] The battery assembly 100 may include at least one chamber 113, part of which is delimited by an external surface of the metal enclosure 102 and another part of which is delimited by a protective casing 114 surrounding all or part of the metal enclosure 102. The metal enclosure 102 has a first internal volume V1, and the chamber 113 has a second internal volume V2 that is sealed against the first internal volume VI. The second parts 108 of at least some (and in particular all) of the battery cells 105 are arranged in said at least one chamber 113. It is thus possible to provide two distinct volumes, one (VI) intended for cooling or heating the battery cells 105, and the other (V2) for electrical connections (making the connectors) on the external casings 106 of the battery cells 105 and possibly on the metal enclosure 102.

[0081] For example, each battery cell 105 is elongated between two opposite longitudinal ends, the first part 107 of said battery cell 105 comprises one of the two opposite longitudinal ends and the second part 108 of said battery cell 105 comprises the other of the two opposite longitudinal ends. The length of the first part 107 of said battery cell 105 (measured along an axis passing through the two opposite longitudinal ends of said battery cell 105) is advantageously greater than the length of the second part 108 of said battery cell 105 (measured along the axis passing through the two opposite longitudinal ends of said battery cell 105). This optimizes the surface area of ​​each battery cell 105 in contact or likely to be in contact with the heat transfer fluid 10.

[0082] A manufacturing process for the battery assembly 100 is now described, this manufacturing process comprising the following steps: • provide the 102 metal enclosure; • for each battery cell 105, partially insert said battery cell 105 into the metallic enclosure 102, in particular via a corresponding opening provided through a wall of the metallic enclosure 102, for example where appropriate until said battery cell 105 rests in a corresponding housing 112; For each battery cell 105 partially inserted into the metal enclosure 102, the manufacturing process includes a step of mounting said battery cell 105 to the metal enclosure 102 in a sealed manner. Such a process is easy to implement while effectively ensuring the sealing of the metal enclosure 102 at the level of the battery cells 105.

[0083] Each assembly step can be carried out by melting at least one metal in the manner described above, for example by brazing or welding. Melting a metal is particularly suitable for ensuring satisfactory sealing, and advantageously for ensuring electrical continuity between the metal enclosure 102 and the battery cells 105.

[0084] Advantageously, this being applicable in particular at least to battery 1 in a battery 1 usage configuration, the heat transfer fluid 10 fills at least in part the metallic enclosure 102 of the battery assembly 100 (and in particular fills the internal circulation volume completely) so that the first parts 107 of each of the battery cells 105 of said battery assembly 100 are immersed in the heat transfer fluid 10.

[0085] The present invention finds an industrial application in the field of electric vehicles by proposing a suitable solution to improve the thermal management of battery cells, where appropriate while facilitating the connection of battery cells.

Claims

Demands

1. Assembly (100) for electric vehicle battery, said assembly (100) for battery comprising: • a support device (101) defining a metallic enclosure (102) for receiving a heat transfer fluid (10), the metallic enclosure (102) comprising an inlet (103) and an outlet (104) for the circulation of the heat transfer fluid (10) through the metallic enclosure (102); • battery cells (105) each comprising a rigid outer casing (106), said battery cells (105) each being mounted in a sealed manner to the metallic enclosure (102) so as to each have a first portion (107) extending into the metallic enclosure (102) and a second portion (108) extending out of the metallic enclosure (102).

2. Battery assembly (100) according to claim 1, wherein each battery cell (105) comprises a first surface (109) of positive polarity and a second surface (110) of negative polarity, and wherein, for each battery cell (105), the second part (108) of said battery cell (105) comprises the first surface (109) and the second surface (110).

3. Battery assembly (100) according to any one of claims 1 to 2, wherein the mounting of each battery cell (105) to the metallic enclosure (102) is achieved by melting at least one metal (111), for example the mounting of each battery cell (105) to the metallic enclosure (102) is a welded or brazed mounting.

4. Assembly (100) for battery according to claim 3, wherein the metal (111) is a filler metal arranged, following its melting, at a junction between the outer casing (106) of the battery cell (105) and the metallic enclosure (102), so that the junction is sealed.

5. Battery assembly (100) according to any one of claims 1 to 4, wherein the support device (101) comprises housings (112), each housing (112) receiving and now, in a predetermined position, one of the battery cells (105).

6. Battery assembly (100) according to any one of the preceding claims, wherein the support device (101) is made in one piece.

7. Battery assembly (100) according to any one of the preceding claims, wherein the metallic enclosure (102) is electrically connected to an anode of each of the battery cells (105).

8. Battery module (200) comprising a battery assembly (100) according to any one of claims 1 to 7.

9. Battery (1) for an electric vehicle comprising an outer structure (2) suitable for being fixed to a chassis of an electric vehicle, said battery (1) comprising: • a plurality of battery modules (200) according to claim 8 arranged inside the outer structure (2); or • at least one battery assembly (200) according to any one of claims 1 to 7 arranged inside the outer structure (2).

10. Thermal management system (41) comprising a battery (1) according to claim 9, said thermal management system (41) comprising: • a closed fluidic circuit (44) fluidic connected fluidically to the inlet and outlet of the metallic enclosure (102) or each of the metallic enclosures (102); • a heat transfer fluid (10) suitable for circulating in the fluidic circuit (44); • means (42) for measuring the temperature of the heat transfer fluid (10); • a pump (43) configured to move the heat transfer fluid in the fluidic circuit (44); • a computer management device (45) configured to receive data from the temperature measurement means (42) and configured to control the pump (43).

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