OPTIMIZED BATTERY MODULE FOR ELECTRIC AGRICULTURAL TRACTOR

Abstract

OPTIMIZED BATTERY MODULE FOR ELECTRIC AGRICULTURAL TRACTOR The invention relates to a battery module configured for integration into an electric agricultural tractor, comprising at least four prismatic cells (10a-10f), characterized in that each prismatic cell (10a-10f) has a substantially rectangular prism shape, the module further comprising at least two layers (110a-110f) of prismatic cells in contact on their lateral faces and two layers being separated by a thermally conductive horizontal plate, an electrical management device (130), comprising an electrical distribution circuit arranged in an upper part of the battery module and at least one bus bar connecting the electrical distribution circuit to an electrical terminal of each prismatic cell, and a thermal management device,comprising at least one cold plate (140a) supplied with cooling fluid and thermally connected to each thermally conductive horizontal plate at a thermally conductive junction zone. Figure for abbreviation: Figure 2,

Description

Title of the invention: OPTIMIZED BATTERY MODULE FOR ELECTRIC AGRICULTURAL TRACTOR Technical field of the invention

[0001] The invention relates to a battery module for an electric vehicle. More particularly, the invention relates to a battery module intended to be integrated into a battery pack in an electric agricultural tractor-type vehicle. Technological background

[0002] In an agricultural context where fieldwork has been greatly facilitated by the development of agricultural machinery, the use of thermal agricultural tractors, widely favored by farmers, will now have to face the challenge of the ecological transition.

[0003] More environmentally friendly approaches tend to move away from the use of fossil fuels as the sole source of fuel; indeed, more and more agricultural machinery is being found with hybrid technology combining fossil fuels and electric power.

[0004] Most of these machines use a chassis with a classic load-bearing structure incorporating the triad "internal combustion engine - transmission shaft - gearbox" which has proven itself for more than a century.

[0005] Some agricultural concepts have been developed around fully electric operation. The vehicle is then powered by at least one battery pack attached to the tractor or on an additional structure installed on it. The internal combustion engine is thus replaced by one or more electric drive systems and a battery pack.

[0006] Integrating the battery pack into the chassis of the electric agricultural tractor raises several issues, particularly related to its large size and to mechanical, electrical safety, and electromagnetic compatibility challenges. Specifically, the electric agricultural tractor must maintain a compact footprint while providing sufficient clearance for wheel turning to ensure maximum maneuverability.

[0007] The battery pack arrangements in electric agricultural tractors also have different constraints than other types of land vehicles such as cars, buses, or trucks, which generally have flat battery floors located in a lower position, under the floor and / or on the roof. Agricultural tractors are not very compatible with these battery floors due to their large wheels. dimensions and the need to maintain space under the agricultural tractor during its operation, as well as the small size of the roof.

[0008] Battery packs are generally made up of several modules, each comprising several battery cells. The modules available on the market generally have functions that occupy unnecessary space in a battery pack because they are redundant, thus increasing the overall size, as they were not developed specifically for an agricultural tractor.

[0009] Finally, agricultural tractor battery modules are subject to maintenance constraints and need to be easily removable and replaceable without intervening on the entire battery pack, which is not the case with prior art systems.

[0010] The inventors therefore sought to provide a solution to overcome these drawbacks. Objectives of the invention

[0011] The invention aims to provide a battery module and a battery pack for an electric agricultural tractor.

[0012] The invention aims in particular to provide, in at least one embodiment, a compact battery module comprising the minimum necessary functionalities.

[0013] The invention aims in particular to provide, in at least one embodiment, a battery module that can be easily installed, removed or replaced in the battery pack.

[0014] The invention aims in particular to provide, in at least one embodiment, a battery module whose dimensions are suitable for use in an agricultural tractor battery pack.

[0015] The invention aims in particular to provide, in at least one embodiment, a battery module with good thermal performance for cooling battery cells, while remaining compact.

[0016] The invention aims in particular to provide, in at least one embodiment, a battery module optimizing the connections of the electrical terminals of the battery cells.

[0017] The invention aims in particular to provide, in at least one embodiment, a battery module allowing equipment to be shared with other battery modules of the same battery pack. Description of the invention

[0018] To this end, the invention relates to a battery module configured to be integrated into an electric agricultural tractor, comprising at least four prismatic cells,

[0019] characterized in that each prismatic cell has a substantially rectangular prism shape having dimensions of length L and width 1 oriented substantially horizontally in the cell's conventional position in the module, and a height h oriented substantially vertically in the cell's conventional position in the module, the length L being greater than the height h and the height being greater than the width 1, and comprising two faces called the upper face and the lower face extending along the length and width, two faces called the lateral faces extending along the length and height, and two faces called the connection faces extending along the height and width, at least one connection face comprising at least one electrical terminal, the module further comprising: - at least two layers of prismatic cells, each layer being formed of at least one row of prismatic cells, each row comprising at least two prismatic cells in contact on their lateral faces and two layers being separated by a thermally conductive horizontal plate, the upper faces of the prismatic cells of a first layer being in contact with a lower face of the thermally conductive horizontal plate and the lower faces of the prismatic cells of a second layer being in contact with an upper face of the thermally conductive horizontal plate, - an electrical management system, comprising: • an electrical distribution circuit arranged in an upper part of the battery module, above the highest prismatic cell layer, • at least one busbar extending opposite a connection face of each prismatic cell, each busbar connecting the electrical distribution circuit to an electrical terminal of each prismatic cell, - a thermal management system, comprising: • at least one cold plate supplied with cooling fluid, arranged substantially vertically on a lateral part of the module and opposite the lateral faces of prismatic cells of the module, each cold plate being thermally connected to each thermally conductive horizontal plate at the level of a thermally conductive junction zone.

[0020] A battery module according to the invention thus makes it possible, thanks to the particular shape of its battery cells and their stacked layer arrangement, to provide a compact arrangement particularly suited to agricultural tractors. Unlike the flat floors generally found in vehicles such as the Whether for cars, buses or trucks, battery modules have a rather vertical and elongated shape, with a lower width so that several battery modules can be joined together on their lateral parts.

[0021] In particular, the battery cells preferably have the following dimensions: - width 1 between 1 cm and 5 cm, - height h between 8 cm and 30 cm, in particular the height is preferably between 2 times and 10 times the width, - length L between 40 cm and 70 cm, in particular length is preferably between 2 times and 6 times height.

[0022] The number of prismatic cells in each row is variable, for example, between 3 and 10 cells per row and between 3 and 10 cell layers per battery module. Preferably, the number of cells per row is equal to the number of cell layers per battery module, in which case the ratio between the width and height of the battery module is close to the ratio between the width and height of each cell. The length of the module is substantially equivalent to the length of the cells that compose it, excluding special components that slightly increase the length, such as bus bars and protective and / or structural casing.

[0023] The power management device is arranged in the upper part of the battery module to allow for a smaller footprint when several battery modules are combined in a battery pack. This arrangement also allows for better accessibility when connecting battery modules together to form a battery pack. Furthermore, the management of an overall power distribution system for the battery pack interfaced with all the battery modules is thus simplified. Busbars are also known as omnibus bars.

[0024] The combination of the cold plate with the thermally conductive horizontal plates arranged between each layer allows for efficient transfer of the heat generated by the conductive cells and cooling by heat exchange with the cooling fluid circulating in the cold plate. The cooling fluid is preferably a coolant.

[0025] Preferably, the battery module comprises two opposing cold plates, on each lateral part of the module.

[0026] Advantageously and according to the invention, the battery module comprises two cold plates arranged on either side of the battery cells, and a mechanical skeleton configured for mechanical compensation of the forces generated by the possible swelling of the battery cells, said mechanical skeleton being formed at least in part by said two cold plates and by each thermally conductive horizontal plate connecting the two cold plates together.

[0027] According to this aspect of the invention, the assembly formed by the two cold plates connected by the thermally conductive horizontal plates, possibly supplemented by protective covers for the bus bars, makes it possible to constitute a skeleton of the battery module which can mechanically take up the forces generated by the swelling of the cells during their aging.

[0028] Throughout the description of the invention, the terms "tractor" and "agricultural tractor" shall be interpreted equivalently and all refer, unless explicitly stated otherwise, to an agricultural work machine intended primarily for transport, handling and traction, as well as for soil work.

[0029] Advantageously and according to the invention, the cold plate includes a circulation circuit comprising a circulation conduit for the cooling fluid, said circulation circuit comprising an ascending zigzag portion in which the circulation conduit runs along each thermally conductive junction zone between the cold plate and a thermally conductive horizontal plate.

[0030] According to this aspect of the invention, the cooling fluid thus circulates as close as possible to the thermally conductive junction areas which receive by thermal conduction the heat diffused by the battery cells which are in the middle of the module, i.e. not directly in contact with the cold plate by one of their lateral faces.

[0031] Preferably, the circulation conduit runs along each thermally conductive junction zone twice, in a round trip path.

[0032] Advantageously and according to the invention, the thermal management device comprises a thermal circuit for distributing the cooling fluid arranged in a lower part of the battery module, said thermal distribution circuit comprising a cooling fluid inlet and outlet configured for connection with a common supply rail to several battery modules.

[0033] According to this aspect of the invention, the thermal distribution circuit is arranged in the lower part of the battery module to allow for a smaller footprint when several battery modules are combined in a battery pack. This arrangement also allows for better accessibility when connecting each battery module of a battery pack to the power rail common to several battery modules. Furthermore, the management of an overall cooling system for the battery pack interfaced with all the battery modules is thus simplified. Each module therefore does not require its own cooling circuit but can share it with the other battery modules.

[0034] The arrangement of the thermal circuit in the lower part also makes it possible to considerably reduce electrical risks in the event of a leak of the cooling fluid, particularly if it is a liquid: in the event of a leak, in particular At the inlet or outlet, the runoff is from the lower part downwards, with no runoff onto the module cells, nor onto the electrical management device arranged in the upper part.

[0035] Advantageously and according to the invention, the battery module comprises a protective case in the shape of a rectangular block formed of walls surrounding all the layers and rows of prismatic cells, at least one of the walls being formed by a cold plate.

[0036] According to this aspect of the invention, each cold plate is an integral part of the protective housing so as to greatly limit the bulk, compared to prior art systems comprising a cold plate and an additional protective plate forming the protective housing.

[0037] Advantageously and according to the invention, the prismatic cells are connected to one or more thermally conductive horizontal plates via a thermal adhesive layer configured to facilitate thermal conduction.

[0038] According to this aspect of the invention, the thermal adhesive layer maximizes heat exchange between each prismatic cell and the thermally conductive horizontal plate(s) with which it is in contact. In the prior art, the prismatic cells are bonded directly to the cold plate without passing through an intermediate thermally conductive layer.

[0039] Advantageously and according to the invention, the prismatic cells of the same row in contact on their lateral faces are connected two by two via a thermal adhesive layer configured to facilitate thermal conduction.

[0040] According to this aspect of the invention, the thermal adhesive layer allows the transmission of heat from the cells to the thermally conductive horizontal plates and to the cold plate. In particular, the thermal adhesive layer allows the cooling of the battery cells located in the middle of the module, i.e., not directly in contact with the cold plate via one of their lateral faces. In the prior art, the adhesive layers between the cells are generally thermally insulating so as to limit heat exchange between cells, which is not ideal for the module arrangement according to the invention, particularly due to the presence of these cells in the middle of the module.

[0041] Advantageously and according to the invention, each busbar is configured for an exchange of electrical power and an exchange of low power electronic signals for control, said electronic signals being exchanged with an electronic circuit of the electrical management device.

[0042] According to this aspect of the invention, the busbar allows for the retrieval of measurement information, for example the electrical potentials of the cells and the temperatures are measured on each cell, and transmitted to the electrical management device which then includes an electronic circuit for managing this data.

[0043] Advantageously and according to the invention, the electrical management device comprises two general terminals configured for connection with an electrical power distribution system common to several battery modules.

[0044] According to this aspect of the invention, in the same way as for thermal management, several modules can thus be associated to form a battery block in which the electrical power transmission circuit is shared.

[0045] Advantageously and according to the invention, each cell includes a degassing valve on at least one of the connection faces.

[0046] According to this aspect of the invention, each cell includes the degassing valve in a location suitable for the evacuation of gases, because it is located on a face exposed to the open air when the module is assembled in a battery pack.

[0047] The invention also relates to a battery pack for supplying electrical power to electrically consuming devices of an agricultural tractor, characterized in that it comprises at least two battery modules according to the invention arranged so that their respective lateral parts are in contact or with minimal spacing from each other.

[0048] A battery pack according to the invention thus allows the compact structure of each module to be advantageously integrated into an electric agricultural tractor. In particular, each module occupies minimal space and can be easily replaced without having to modify the entire battery pack.

[0049] Advantageously and according to the invention, the battery pack includes a supply ramp, configured for supplying cooling fluid to each thermal management device of the battery modules.

[0050] Advantageously and according to the invention, the battery pack includes an electrical power distribution system configured for the transmission of electrical power with each electrical management device of the battery modules.

[0051] The invention also relates to an electric agricultural tractor comprising electrical energy-consuming devices for receiving electrical energy, characterized in that it comprises a battery pack according to the invention for supplying electrical energy to the electrical energy-consuming devices.

[0052] The invention also relates to a battery module, a battery pack and an electric agricultural tractor characterized in combination by all or part of the characteristics mentioned above or below. List of figures

[0053] Other objects, features and advantages of the invention will become apparent from the following description, given by way of non-limiting example only, and which refers to the accompanying figures in which: • [Fig-1] is a schematic perspective view of a prismatic cell of a battery module according to one embodiment of the invention, • [Fig.2] is a schematic perspective view of a battery module according to one embodiment of the invention, • [Fig.3] is a schematic side view of a battery module according to one embodiment of the invention, • [Fig. 4] is a partial schematic front view of a battery module according to one embodiment of the invention, • [Fig. 5] is a partial schematic view of the underside of two battery modules according to one embodiment of the invention, • [Fig. 6] is a schematic top view of a battery system of an electric tractor, comprising several battery packs according to an embodiment of the invention, • [Fig.7a] is a schematic front view of a battery module according to a method of embodiment of the invention, • [Fig.7b] is a schematic rear view of a battery module according to a method of embodiment of the invention.

[0054] Detailed description of an embodiment of the invention

[0055] In the figures, the scales and proportions are not strictly respected for the purposes of illustration and clarity.

[0056] Identical, similar or analogous elements are designated by the same references in all figures.

[0057] Fig. 1 schematically represents in perspective a prismatic cell 10 of a battery module according to an embodiment of the invention.

[0058] The cell 10 is known to be a prismatic cell due to its prismatic shape, in particular that of a rectangular prism (or parallelepiped). The prismatic cell 10 of a battery module according to an embodiment of the invention differs from prismatic cells of the prior art by its particular dimensions. In particular, the prismatic cell conventionally has dimensions of a length L and a width w oriented substantially horizontally in the conventional position of the cell in the module, and a height h oriented substantially vertically in the conventional position of the cell in the module, but is distinguished by the fact that the length L is greater than the height h and the height is greater than the width w. The prismatic cell thus comprises two faces, called the upper face 12a and the lower face 12b, extending along the length L and the width w, and two faces, called faces 14a, 14b laterals extending along the length L and the height h, and two connecting faces, referred to as faces 16a and 16b, extending along the height and width, at least one connecting face comprising at least one electrical terminal 18, in particular each connecting face comprising an electrical terminal. The prismatic cell 10 may also include a venting valve 20 for the ventilation of the prismatic cell, on one or both connecting faces.

[0059] The particular format of this prismatic cell 10 allows the formation of a battery module suitable for integration into an electric tractor.

[0060] Fig. 2, Fig. 3, Fig. 4 and Fig. 5 schematically represent a battery module 100 according to an embodiment of the invention, respectively in perspective, side, front and bottom, incorporating in particular prismatic cells as represented in Fig. 1.

[0061] The battery module 100 comprises at least two layers of prismatic cells, here six layers 110a, 110b, 110c, HOd, 110e, 110Of of prismatic cells, each layer being formed of at least one row of prismatic cells, each row comprising at least two prismatic cells, here six prismatic cells per row. The lowest layer 110a comprises, for example, cells 10a, 10b, 10c, 10Od, 10e, 110Of, and the upper layers comprise the same number of prismatic cells.

[0062] The prismatic cells of the same row are in contact on their lateral faces and two layers are separated by a thermally conductive horizontal plate 120b, 120c, 120d, 120e, 120f, visible in particular in figures 3 and 4. The cells of the lower layer 110a are also in contact with a thermally conductive horizontal plate 120a in the lower part of the battery module 100 and the cells of the lower layer 110f are also in contact with a thermally conductive horizontal plate 120f in the upper part of the battery module 100.

[0063] The upper faces of the prismatic cells of a first layer are in contact with an lower face of the thermally conductive horizontal plate and the lower faces of the prismatic cells of a second layer are in contact with an upper face of the thermally conductive horizontal plate.

[0064] The battery module also includes a power management device 130, comprising: • an electrical distribution circuit 132 arranged in the upper part of the battery module, above the highest layer of prismatic cells. The electrical distribution circuit 132 allows, in particular, the centralization and distribution of electrical connections to each prismatic cell integrated into the battery module. • at least one busbar, preferably two busbars (not shown), a first busbar extending opposite the connection faces of each prismatic cell and a second busbar extending opposite the connection faces of each prismatic cell, each busbar connecting the electrical distribution circuit to one of the electrical terminals of each prismatic cell.

[0065] The electrical management device 130 further includes two general terminals configured for connection with an electrical power distribution system common to several battery modules, as seen in particular in [Fig.6] described below.

[0066] In a particular embodiment, each busbar is configured for the exchange of electrical power and low-power electronic signals for control, said electronic signals being exchanged with an electronic circuit of the electrical management device. In an overall electrical power distribution system, this electronic circuit enables the acquisition of control parameters, the load balancing of series-connected cell groups, and the exchange of information with the computer, allowing for the complete management of the electric tractor's battery system.

[0067] The battery module also includes a thermal management device, comprising at least one cold plate, here two cold plates 140a, 140b supplied with cooling fluid, arranged substantially vertically on a lateral part of the module and in contact with the lateral faces of prismatic cells of the module, each cold plate being thermally connected to each horizontal thermally conductive plate 120a, 120b, 120c, 120d, 120e, 120f, 120g at a thermally conductive junction zone. As can be seen in particular in [Fig. 4], the heat released by the prismatic cells, in particular those arranged in the center of the module, is dissipated by the horizontal thermally conductive plates to the cold plates to allow their cooling.The cold plates also advantageously form a structural element of the 100 battery module, forming one of the walls of a rectangular protective casing surrounding all the layers and rows of prismatic cells. Furthermore, the two cold plates arranged on either side of the battery cells and each thermally conductive horizontal plate connecting the two cold plates partially form a mechanical skeleton configured to compensate for the stresses generated by any potential swelling of the battery cells.

[0068] In the embodiment described and as shown in particular in [Fig. 3], the cold plate 140a comprises a circulation circuit 142 including a cooling fluid circulation conduit, said circulation circuit comprising An ascending zigzag section in which the circulation duct runs alongside each thermally conductive junction zone between the cold plate and a thermally conductive horizontal plate. Specifically, the circulation duct includes horizontal sections 142a running alongside each thermally conductive junction zone, vertical sections 142b connecting the horizontal sections 142a, and a vertical return section 142c. Cooling is thus optimized near the horizontal plates to maximize the overall cooling of the prismatic cells.

[0069] The second cold plate 140b, not visible on [Fig.3], preferably includes a similar circulation circuit.

[0070] To further optimize heat transmission, the prismatic cells are connected to one or more thermally conductive horizontal plates via a thermal adhesive layer configured to facilitate thermal conduction between the prismatic cells of the same row in contact on their lateral faces are connected two by two via a thermal adhesive layer configured to facilitate thermal conduction.

[0071] As can be seen in particular in [Fig. 3] and [Fig. 5], the thermal management device includes a thermal circuit 144 for distributing the coolant arranged in a lower part of the battery module. This thermal distribution circuit includes a coolant inlet 114a and a coolant outlet 144b configured for connection with a common supply rail for several battery modules, specifically including an inlet rail 144c and an outlet rail 144d. This configuration in the lower part of the battery module helps, in particular, to limit damage in the event of a coolant leak, since the connection elements are mostly located in a lower position within the battery module when it is arranged in an electric tractor.

[0072] As shown in [Fig. 5] depicting two identical adjacent battery modules, the inlet 114a is connected to the inlet ramp 144c via a quick-connect fitting 148, which is connected to the left battery module and disconnected on the right battery module for illustrative purposes. The quick-connect fitting is connected during operation of the thermal management device. The inlet 114a is connected to a divider 146, which distributes the coolant into the two cooling circuits of the two cold plates, via two connectors 146a and 146b.

[0073] Figure 6 schematically represents, from above, a battery system of an electric tractor, comprising several battery packs according to an embodiment of the invention, in particular a first lateral battery pack 200a comprising here four modules 100a, 100b, 100c, 100d, a second lateral battery pack 200b comprising here five modules 100e, lOOf, 100g, lOOh, lOOi, and a central battery pack 200c comprising here six modules lOOj, 100k, 1001, 100m, lOOn, lOOo. The number of battery modules shown here is purely illustrative and depends on the size of each prismatic cell, each battery module, and the space available for integration into an electric agricultural tractor. However, given the constraints of conventional agricultural tractors, and as is the case in this illustrative embodiment: - The central battery pack is generally the one that includes more modules because the free space is the largest and allows for better weight distribution of the battery system, - one of the side battery packs usually includes a smaller number of battery modules to leave space for a ladder providing access to the driver's seat of the electric agricultural tractor, when the agricultural tractor is intended to be driven by an operator.

[0074] A battery pack is formed of several battery modules arranged so that their respective lateral surfaces are in contact or with minimal spacing between them, in particular so that their cold plates are in contact or with minimal spacing between them when each module comprises two cold plates. This arrangement and the specific geometry of the battery modules make it possible to maximize the number of battery cells on board an electric tractor while taking into account the constraints, in particular those related to wheel movement during the tractor's travel and changes of direction. Furthermore, each battery module is an easily repairable or replaceable unit of the battery system.The presence of the electrical management device in the upper part and the thermal management device in the lower part also facilitates intervention as well as connections to distribution systems common to several battery modules.

[0075] Each battery pack includes in particular a supply rail, configured for supplying cooling fluid to each thermal management device of the battery modules.

[0076] Each battery pack also includes an electrical power distribution system configured for the transmission of electrical power with each electrical management device of the battery modules.

[0077] In a comprehensive battery system of an electric agricultural tractor, the electrical power distribution system includes, in particular, power buses, here a first power bus 210a for the battery modules of the first lateral 200a block, a second power bus 210b for the battery modules of the second lateral 200b block, a third power bus 210c for the battery modules from the central block 200c and a fourth power bus 201d connecting the first power bus 210a, the second power bus 210b and the third power bus 210c.

[0078] The power buses are represented here in a simplified manner and generally include connectors and cables and / or busbars for each polarity, and may be continuous or discontinuous, etc., as long as they each connect all the battery modules of all the battery packs to a common electrical network. This common network can be managed by a general 220V controller, responsible for the electrical management of the entire battery system in relation to the needs of the electrical power-consuming devices of the electric agricultural tractor.

[0079] An example of busbar implementation at the battery module level is shown in [Fig. 7a] and [Fig. 7b], which respectively represent a front and rear view of a battery module according to an embodiment of the invention, sharing the same characteristics as the embodiment of Figures 2 to 5, and whose elements have identical reference numerals. The valves are not shown for clarity, but are present in the same manner as in the embodiments already described. In particular, the 110a, 110b, 110c, HOd, 110e, 1 lOf cell layers are arranged in the same way and each cell is connected with the cell above the cell below by omnibus bars 150a, 150b, 150c, 150d arranged on the front face and by omnibus bars 150e, 150f, 150g, 150h, 150i, 150j arranged on the back face.The alternating front and rear faces allow the power electrical circuit to be formed.

[0080] The busbars also include electronic connectors 152a, 152b allowing the recovery of low-power electronic signals for cell control, in particular the recovery of the voltages of each cell. The busbars are thus hybrid, allowing the transmission of high-power electrical energy and low-power electronic signals.

Claims

1. Demands Battery module configured for integration into an electric agricultural tractor, comprising at least four prismatic (10; 10a-lOf) cells, characterized in that each cell (10;10a-lOf) prismatic has a shape substantially of a rectangular prism having dimensions of a length (L), a width (w) oriented substantially horizontally in the classic position of the cell in the module, and a height (h) oriented substantially vertically in the classic position of the cell in the module, the length (L) being greater than the height (h) and the height being greater than the width (w), and comprising two faces called upper face (12a) and lower face (12b) extending along the length and width, two faces called lateral faces (14a, 14b) extending along the length and height, and two faces called connecting faces (16a, 16b) extending along the height and width, at least one connecting face (16a, 16b) comprising at least one electrical terminal (18), the module further comprising:; - at least two layers (110a-11 Of) of prismatic cells, each layer (HOa-llOf) being formed of at least one row of prismatic cells, each row comprising at least two prismatic cells in contact on their lateral faces and two layers being separated by a thermally conductive horizontal plate (120a-120g), the upper faces of the prismatic cells of a first layer being in contact with a lower face of the thermally conductive horizontal plate (120a-120g) and the lower faces of the prismatic cells of a second layer being in contact with an upper face of the thermally conductive horizontal plate (120a-120g), - an electrical management device (130), comprising: • an electrical distribution circuit arranged in an upper part of the battery module, above the highest prismatic cell layer, • at least one busbar extending opposite one connection face of each cell prismatic each omnibus bus connecting the electrical distribution circuit to an electrical terminal of each prismatic cell, - a thermal management device, comprising: • at least one cold plate (140a, 140b) supplied with cooling fluid, arranged substantially vertically on a lateral part of the module and in contact with lateral faces of prismatic cells of the module, each cold plate (140a, 140b) being thermally connected to each thermally conductive horizontal plate at the level of a thermally conductive junction zone.

2. Battery module according to claim 1, characterized in that the cold plate (140a, 140b) comprises a circulation circuit (142) including a cooling fluid circulation conduit, said circulation circuit comprising an ascending zigzag portion in which the circulation conduit runs along each thermally conductive junction zone between the cold plate (140a, 140b) and a thermally conductive horizontal plate (120a-120g).

3. Battery module according to any one of claims 1 or 2, characterized in that the thermal management device comprises a thermal circuit (144) for distributing the coolant arranged in a lower part of the battery module, said thermal distribution circuit comprising a coolant inlet (144a) and outlet (144b) configured for connection with a common supply ramp (144c, 144d) for multiple battery modules.

4. Battery module according to any one of claims 1 to 3, characterized in that it comprises a rectangular block-shaped protective housing formed of walls surrounding all the layers and rows of prismatic cells, at least one of the walls being formed by a cold plate (140a, 140b).

5. Battery module according to any one of claims 1 to 4, characterized in that the prismatic cells (10a-10of) are thermally connected to one or more horizontal plates (120a-120g) conductive via a thermal adhesive layer configured to facilitate thermal conduction.

6. Battery module according to any one of claims 1 to 5, characterized in that the prismatic (lOa-lOf) cells of the same row in contact on their lateral faces are connected two by two via a thermal adhesive layer configured to facilitate thermal conduction.

7. Battery module according to any one of claims 1 to 6, characterized in that each bus bar is configured for an exchange of electrical power and an exchange of low power electronic signals for control, said electronic signals being exchanged with an electronic circuit of the electrical management device (130).

8. Battery module according to any one of claims 1 to 7, characterized in that the electrical management device (130) comprises two general terminals configured for connection with an electrical power distribution system common to several battery modules.

9. Battery module according to any one of claims 1 to 8, characterized in that each cell comprises a venting valve (20) on at least one of the connection faces.

10. Battery module according to any one of claims 1 to 9, characterized in that it comprises two cold plates (140a, 140b) arranged on either side of the battery cells, and a mechanical skeleton configured for mechanical compensation of the forces generated by the possible swelling of the battery cells, said mechanical skeleton being formed at least in part by said two cold plates (140a, 140b) and by each thermally conductive horizontal plate (120a-120g) connecting the two cold plates (140a, 140b) together.

11. Battery pack intended for supplying electrical power to electrically consuming devices of an agricultural tractor, characterized in that it comprises at least two modules (lOOa-lOOd; lOOe-lOOi; lOOj-lOOo) of batteries according to any one of claims 1 to 10 arranged so that their respective lateral parts are in contact or with minimal spacing from each other.

12. Battery pack according to claim 11, characterized in that it comprises a supply ramp (114c), configured for supplying cooling fluid to each thermal management device of the battery modules.

13. Battery pack according to any one of claims 11 or 12, characterized in that it comprises an electrical power distribution system (210a, 210b, 210c, 210d, 220) configured for the transmission of electrical power with each electrical management device of the battery modules.

14. Electric agricultural tractor comprising electrically power-consuming devices for receiving electrical power, characterized in that it comprises at least one battery pack (200a, 200b, 200c) according to any one of claims 11 to 13 for supplying electrical power to the electrically power-consuming devices.

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