Arrangement comprising a tank and a battery, the battery being attached to the tank

Abstract

The invention relates to an arrangement (2) for a vehicle, the arrangement (2) comprising a tank (10) for storing an energy fluid, in particular dihydrogen, and a battery (20) for traction and / or propulsion of such a vehicle, the battery (20) being attached to the tank (10).

Description

[0001] TITLE: Arrangement comprising a tank and a battery, the battery being attached to the tank.

[0002] Technical field of the invention

[0003] The invention relates to an arrangement comprising a tank and a traction and / or propulsion battery for a vehicle, the battery being attached to the tank. The invention also relates to a body comprising such an arrangement. The invention also relates to a vehicle comprising such an arrangement or such a body.

[0004] State of the prior art

[0005] A vehicle, particularly a motor vehicle, equipped with a powertrain using an energy fluid generally requires a tank for such a fluid. Thus, in the case of a powertrain using dihydrogen, for example comprising a fuel cell, such a tank generally comprises one or more metal cylinders each having a substantially cylindrical shape whose length is much greater than its diameter. Such hydrogen cylinders are particularly heavy and bulky. Moreover, for a bus or coach, such cylinders are generally arranged substantially in a horizontal plane on the roof.

[0006] Typically, such a vehicle includes a battery for storing electrical energy, particularly electrical energy produced by such a fuel cell.

[0007] However, bulky and heavy storage cylinders are not suitable for a passenger car type motor vehicle, particularly for issues related to aesthetics and / or aerodynamic performance and / or road holding performance. However, it is necessary to have a large tank in order to be able to store a maximum of dihydrogen, which guarantees autonomy for such a vehicle. In addition, it is also necessary to install such a vehicle such a particularly bulky electric energy storage battery.

[0008] Presentation of the invention

[0009] The object of the invention is to provide an arrangement which overcomes the above drawbacks. In particular, the invention provides an arrangement comprising a battery attached to the tank so as to maximize the storage volume within the tank.

[0010] Summary of the invention

[0011] To achieve this objective, the invention relates to an arrangement for a vehicle, the arrangement comprising:

[0012] - a tank intended to store an energy fluid, in particular dihydrogen, and

[0013] - a traction and / or propulsion battery of such a vehicle, the battery being attached to the tank.

[0014] The reservoir may include a battery receiving cavity, the battery being able to extend at least partially within the receiving cavity.

[0015] The battery and the cavity can each extend mainly on either side of the same longitudinal and transverse plane.

[0016] The tank may be obtained at least partially from composite material, in particular from composite material comprising fiberglass and / or carbon fiber.

[0017] The arrangement may comprise fastening means for fastening the battery to the tank. The fastening means may comprise threaded elements and tapped elements, the threaded elements being able to cooperate with the tapped elements, in particular so as to pass through the battery and / or the tank, in particular by sandwiching them.

[0018] The reservoir may comprise vertical wells and the battery may comprise bores of vertical axes, the bores may be opposite vertical wells, the tapped elements and / or the threaded elements may be arranged in vertical wells and / or within bores opposite vertical wells.

[0019] The arrangement may include conduits and / or electrical wiring and the reservoir may include longitudinal wells, the conduits and / or electrical wiring being able to extend within the longitudinal wells.

[0020] The invention also relates to a vehicle body, in particular for a motor vehicle, the body comprising an arrangement as defined above, the body comprising at least one side member and / or at least one cross member, the tank being fixed to the at least one side member and / or to the at least one cross member.

[0021] The invention also relates to a vehicle, in particular a motor vehicle, comprising a body as defined previously, or an arrangement as defined previously.

[0022] Presentation of figures

[0023] These objects, characteristics and advantages of the present invention will be explained in detail in the following description of an embodiment of an arrangement made without limitation in relation to the attached figures among which:

[0024] Figure 1 is a schematic view of a motor vehicle according to one embodiment of the invention. Figure 2 is a perspective view of a body according to one embodiment of the invention, a battery comprising two blocks.

[0025] Figure 3 is a bottom view of the body according to the embodiment of the invention, the battery comprising two blocks.

[0026] Figure 4 is another perspective view of the case according to the embodiment of the invention, the battery comprising two blocks.

[0027] Figure 5 is a sectional view along a vertical and transverse plane of the body according to the embodiment of the invention.

[0028] Figure 6 is a bottom view of the body according to the embodiment of the invention, the battery being a single unit.

[0029] Figure 7 is a side view of the body according to the embodiment of the invention, the battery being a single unit.

[0030] Detailed description

[0031] The direction in which a vehicle, especially a motor vehicle, moves in a straight line is defined as the longitudinal direction X. By convention, the direction perpendicular to the longitudinal direction, located in a plane parallel to the ground, is called the transverse direction Y. The third direction, perpendicular to the other two, is called the vertical direction Z. Thus, we use a direct XYZ reference frame in which X is the longitudinal direction in the front-rear direction of the vehicle, therefore directed towards the rear, Y is the transverse direction directed towards the right and Z is the vertical direction directed upwards. The forward direction corresponds to the direction in which the vehicle usually moves in the longitudinal direction and is opposite to the rear direction.

[0032] As illustrated in Figure 1, a vehicle 1, for example a motor vehicle, comprises a body 3. The vehicle 1, or the body 3, comprises an arrangement 2. As illustrated in Figure 2, the body 3 comprises at least one side member. Preferably, the body 3 comprises two side members, for example a right side member 4R and a left side member 4L. The right side member 4R extends longitudinally, or substantially longitudinally, to the right or right side of the body. The left side member 4L extends longitudinally, or substantially longitudinally, to the left or left side of the body. The body 3 further comprises at least one cross member. A cross member extends transversely, or substantially transversely. Preferably, a cross member extends between a left side member and a right side member. More preferably, a cross member is attached to or to a left side member and is attached to or to a right side member.Preferably, the body comprises two cross members, for example a front cross member 6F and a rear cross member 6R. Alternatively, the body 3 comprises more cross members and / or side members.

[0033] As illustrated in particular in Figure 3, the arrangement 2 comprises a tank 10 or storage means. The tank 10 is intended to store an energy fluid. Preferably, the tank 10 is fixed to the right side member 4R and / or to the left side member 4L of the body 3. Preferably, the tank 10 is fixed to the front cross member 6F and / or to the rear cross member 6R of the body 3. Advantageously, as illustrated in Figures 2 to 7, the tank 10 is fixed under the side member(s) 4R; 4L and / or under the cross member(s) 6F; 6R. For example, as illustrated in Figure 5, the tank 10 is fixed under a side member and / or under a cross member by screw-nut systems each comprising a screw 41 and a nut 42. Note that preferably, the tank 10 comprises wells 11 or barrels or bores or holes or drillings extending vertically.In this case, screws 41 pass through vertical wells 11 of the tank 10 as well as holes made in the side member(s) and / or in the cross member(s) and cooperate with nuts 42. For example, as illustrated in FIG. 5, the nut 42 comes into contact with the side member or the cross member, or in contact with a washer itself arranged in contact with the side member or the cross member. Alternatively, the nut comes into contact with the tank, or in contact with a washer itself arranged in contact with the tank. In any event, preferably, the tank 10 is sandwiched between a screw head, or a nut, or a washer, and at least one side member and / or at least one cross member, possibly with the interposition of a washer and / or a spacer 43.

[0034] Preferably, the energy fluid is a gas, advantageously dihydrogen. In this case, preferably, the vehicle comprises a fuel cell 5. The fuel cell 5 is then supplied with dihydrogen so as to produce electrical energy. The arrangement 2 also comprises a traction and / or propulsion battery 20 for the vehicle 1. The battery 20 is preferably capable of storing electrical energy produced by the fuel cell, and / or produced by the decelerations and / or braking of the vehicle, and / or coming from an electric charging station via a means of transferring this electrical energy, for example of the cable type.

[0035] More specifically, in the arrangement 2, the traction and / or propulsion battery 20 is fixed to the tank 10. Preferably, as illustrated in particular in FIG. 5, the arrangement 2 comprises fixing means 30 for fixing the battery 20 to the tank 10. Preferably, the battery 20 is fixed under the tank 10. In other words, the tank 10 extends above the battery so that an upper face 22 extending substantially transversely and longitudinally of the battery is opposite the tank 10. More specifically, advantageously, the fixing means 30 comprise threaded elements 31, preferably screws, and tapped elements 32, preferably nuts. Thus, the threaded elements 31 cooperate with the tapped elements 32. For example, the tapped elements 32 are fixed, for example embedded, inserted by force, glued, in vertical wells 11 of the tank 10.In this case, the threaded elements 31 pass through the battery 20 and are screwed into the tapped elements 32 blocked in the corresponding wells of the tank 10.

[0036] For this purpose, the battery 20 comprises bores 21 with vertical axes, as illustrated in FIGS. 5 and 6. These vertical bores 21 are arranged in the battery 20 so as to be opposite vertical wells 11 of the tank 10. Thus, preferably, the nuts 32 are arranged within the vertical wells 11 and the screws 31 pass through the thickness in the vertical direction of the battery 20, via the bores 21, to be screwed into the nuts 32. In this case, the battery is sandwiched between the heads of the screws 31 and the tank 10. In this case, the screws 31 are inserted from the bottom upwards to ensure the battery is fixed under the tank. Although six fastening means 30 are illustrated in FIGS. 2 and 6 in particular, more fastening means or fewer fastening means are conceivable.

[0037] Alternatively, the screws are inserted from top to bottom and pass through vertical wells in the tank to either cooperate with nuts fixed in the thickness of the battery in the vertical direction, or also pass through the bores of the battery to cooperate with nuts under the battery.

[0038] Alternatively, the screws are inserted from the bottom up and pass through vertical bores in the battery and then through vertical wells in the tank to engage nuts fixed above the tank.

[0039] Whichever mounting method is chosen, the battery is preferably in contact with the tank, i.e. attached directly to the tank.

[0040] Alternatively, a base extends at the level of the facing surfaces between the battery and the tank, for example to provide thermal insulation, in particular to protect the tank in the event of thermal runaway of the battery. Alternatively again, a fixing base is arranged between the battery 20 and the tank 10, for example a base mounted at the edge of the chain on the battery or on the tank to facilitate the fixing of the battery to the tank.

[0041] For example, washers are provided under the screw heads, and / or under the nuts when possible, so as to distribute the tightening force over an area greater than that provided by a screw head or a nut, for example to avoid pushing in or damaging the contact surface of the tank or the battery, and / or to prevent untimely loosening.

[0042] Preferably, as illustrated in Figures 2, 3, 4 and 5, the reservoir 10 comprises a receiving cavity 15 for the battery 20. The battery 20 extends at least partially within the receiving cavity 15. Preferably, the battery 20 has substantially the shape of a rectangular parallelepiped. The dimensions of the battery 20 in the longitudinal and transverse directions are greater than the dimension in the vertical direction. Thus, the cavity then preferably has substantially the shape of a rectangular parallelepiped of similar dimensions. Preferably, the heights of the cavity and the battery are substantially identical. The dimensions in the longitudinal and transverse directions are slightly greater for the cavity than those of the battery. In this case, the battery is for example housed entirely in the cavity.Preferably, the battery is fixed to the tank via a translation in the vertical direction, in particular from bottom to top. Thus, it is appropriate that clearances between the battery 20 and the cavity 15 are present in the transverse and longitudinal directions. In addition, as illustrated in FIGS. 4, 5 and 6 in particular, the tank 10 preferably comprises two lateral extensions 16 extending longitudinally, preferably forward, on either side of the cavity 15 in the transverse direction. The extensions 16 are circled in dotted lines in FIG. 5. For example, each extension 16 is substantially in the shape of a rectangular parallelepiped, possibly comprising at least one chamfer 18 illustrated in FIG. 2 in particular. The tank 10 also preferably comprises an upper part 17 extending above the battery 20 in the vertical direction, as illustrated in dotted lines in FIGS. 5 and 7.For example, the upper portion 17 extends between the side members 4R, 4L, or at least partly between these two side members (see Figure 5). For example, the upper portion 17 is substantially in the shape of a rectangular parallelepiped. For example, the battery does not extend over the entire width in the transverse direction available between the two side members. The tank preferably extends forward above the battery via the upper portion 17 (or below the battery - embodiment not shown) and on each side via the two lateral extensions 16 so as to surround, protect the battery and create additional tank storage volume. For example, the volume gain provided by the upper portion 17 and the two extensions 16 is approximately 25 percent.

[0043] As illustrated in FIG. 2, the battery 20 extends mainly in a longitudinal and transverse plane P20, or substantially longitudinal and transverse. For example, the plane P20 is substantially a plane of symmetry of the parallelepiped shape of the battery. For example, the plane P20 is also substantially a plane of symmetry of the parallelepiped shape of the cavity 15 receiving the battery. The reservoir 10 extends mainly in a longitudinal and transverse plane, or substantially longitudinal and transverse. For example, the reservoir, the battery and the cavity extend substantially at the same longitudinal and transverse plane.

[0044] Advantageously, the tank 10 is obtained at least partially, or even entirely, from composite material. For example, the composite material comprises fiberglass. Alternatively, or in addition, the composite material comprises carbon fiber. Alternatively, or in addition, the composite material comprises Kevlar fiber (registered trademark). As illustrated in Figures 4 and 5, the tank 10 comprises holes or wells 12 extending longitudinally. Preferably, these longitudinal wells 12 pass through the tank in the longitudinal direction. As mentioned previously, the tank comprises vertical wells 11 passing through the tank in the vertical direction. Preferably, holes or wells (not shown) extend in the transverse direction so as to pass through the tank. Preferably, the holes 11, 12 come from hollow tubes arranged within the tank 10.In this case, the tank 10 comprises tubes or reinforcement tubes (not shown) passing right through the tank 10. For example, the tubes are made of composite material. Alternatively, such tubes are made of steel, or aluminum alloy, or another material. Thus, thanks to the presence of tubes which pass through the tank 10 in the three directions X, Y, Z, the holes 11, 12 made within each tube also pass through the tank. Although the hollow tubes are preferably of circular section, tubes of hexagonal, square, rectangular section or other shapes may also be suitable. Such a tank shape, combined with the strength characteristics of the fibers composing it, provides very high strength, in particular capable of withstanding very high pressures within the tank, for example of the order of 700 bars. Thus, the tank 10 can store a pressurized gas such as dihydrogen.

[0045] Preferably, the tank is polymorphic in composites. The tank is shaped to adapt to a floor and / or to the side members and / or to the cross members of the vehicle. Preferably, as illustrated in particular in the section of Figure 5, the tank has a section close to a T extending upside down, that is to say the bar of the T at the bottom. Preferably, at the level of the widest and thinnest part, rectangular-shaped reinforcement wells, for example having a pronounced radius, in particular almost oval, are provided. Preferably, the wells are used for holding or fixing the tank on the two side members 4R, 4L of the vehicle body. In order to maximize the storage volume of the tank 10, the battery is therefore fixed to the tank, a cavity-type receiving space substantially taking the shape of the battery being provided within the tank.

[0046] Thus, as illustrated in Figure 5, the wells, in particular obtained by tubes, accommodate inserts having various shapes and / or different lengths, in particular depending on the length of the well. Advantageously, the inserts are cylindrical and tapped. Thus, the inserts are preferably the tapped elements 32 seen previously to facilitate the mounting of threaded elements to be screwed such as screws 31, for example in metric pitch.

[0047] Preferably, the arrangement 2 comprises conduits or pipes or hoses or hoses 8, for example for transporting liquid and / or gas, possibly under pressure. Such conduits may carry brake fluid, coolant for example to cool the battery, or even carry an energy fluid, such as a gas or a fuel in the liquid state. Alternatively, or in addition, the arrangement comprises electrical wiring, for example electrical wires or braids. In the case of longitudinal wells 12 provided within the tank, the conduits and / or electrical wiring 8 extend within certain longitudinal wells 12 as illustrated in FIGS. 4 and 5.

[0048] The solution is particularly suitable for a vehicle using hydrogen in its powertrain and can be used on both a private motor vehicle and a utility vehicle. The solution makes it possible to reduce the mass of the body or chassis of the vehicle. Indeed, preferably, the presence of the extremely rigid and solid tank 10, fixed to the side members 4R, 4L and / or to the cross members 6F, 6R, makes it possible to reduce the number of cross members. Indeed, at the tank in the longitudinal direction, it is not useful to provide cross members, the tank acting as a cross member. In addition, the mass of the tank 10, preferably made of composite material, is much lower than a tank consisting of one or more cylindrical metal bottles.Since the tank is unique, there is no need for high-pressure fittings and / or pipes and / or hoses to combine several volumes together, which avoids maintenance and the risk of leaks inherent in such junctions during the life of the vehicle. Thus, the tank is particularly reliable and requires little or no maintenance. Unlike metal cylinders, the shape of the tank 10 can be easily adapted to the needs, in particular in terms of the dimensions of the different vehicle bodies. This results in a particularly compact tank that can be specifically integrated into the underbody of vehicles. Optimizing the shape of the tank 10 makes it possible to accommodate the battery 20 without reducing the storage volume of the tank.As a reminder, two longitudinal lateral extensions 16 and / or the upper part 17 compensate for, fill the storage space “lost” due to the integration of the battery at the tank level. In addition, the volume of the vehicle’s passenger compartment is not impacted. The solution has no impact on the aesthetics of the vehicle. It also does not alter the aerodynamic performance. In addition, it is beneficial in terms of road holding, the mass of the tank and battery assembly lowering the vehicle’s center of gravity.

[0049] Furthermore, the tank is designed specifically according to the shape of the body, in particular that of the side members and cross members, so as to match these shapes. As mentioned previously, the wells of the tank, in particular the vertical wells 11, allow the tank to be fixed to the side members and / or cross members and the battery to be fixed to the tank. Preferably, inserts are provided within the wells to facilitate the fixing step. Note that in Figures 2, 3, 4 and 5, the battery 20 is in two parts. The battery comprises a cell block 25 and a block 26 intended to support, encompass, and store the relays, wiring and / or connectors for connection with vehicle components, or even an electronic part for managing the battery. The blocks 25, 26 are preferably fixed to each other, for example independently of the fixings used to fix the tank or the battery.For example, the block 26 is connected to the cell block 25 by tabs, for example made of copper, incoming or outgoing, like a connector, in particular electrical (not shown). In this case, the block 26 is for example arranged outside the cavity 15 formed within the reservoir 10, for example at the front of the block 25. Note that the block 26 is preferably of parallelepipedal shape. The height in the vertical direction and the width in the transverse direction of the block 26 are for example substantially equal to the width and the height of the block 25. Alternatively, the block is arranged within the cavity (case not shown). In any case, the battery is separated in two for example. Thus, the block 25 of the battery cells can be dismantled, removed, be independent of a battery box or enclosure, the block 25 then being fixed to the reservoir, in particular under the reservoir as seen previously.For example, six externally drilled ears 13 are arranged, provided, extending outward from the cell block 25 to allow the passage of fixing screws passing through the ears to the outside of the cell block as illustrated in Figure 4.

[0050] In Figures 6 and 7 in particular, the battery 20 is a single-piece, preferably self-contained. In other words, the battery comprises a sealed casing or box, so that it is in one piece. In this case, the battery 20 is fixed with screws passing through the sealed box. In this case, tubes extend within the battery in a sealed manner. Advantageously, the battery 20 comprises a connector 29 preferably extending longitudinally towards the rear, for example to power one or more electric motors fitted to the vehicle. In this case, preferably, the tank 10 comprises a recess, a notch, or a notch 19 so as to provide space at this connector 29 and / or to allow the connection / disconnection of a male or female connector, if applicable, on this connector 29. As mentioned previously, an electrical harness or conduit or wiring 8 preferably extends at least partially within longitudinal wells 12.In this case, preferably a wiring extends from the connector 29 towards the rear through a longitudinal well opening near the recess 19.

[0051] Regardless of the type of battery, whether monobloc or comprising two blocks, the battery enclosure or casing or envelope can be thinner, less solid since it is housed in the cavity. For example, only a plate with a thickness of a few millimeters is arranged in a longitudinal and transverse plane under the battery so as to protect the underside of the battery from the ground. As a result, the total volume of the battery is smaller, its weight is reduced, which generates savings.

[0052] Optionally, a device completely or partially surrounds the cell block, or the monobloc battery, for example a device comprising one or more plates comprising a cooling circuit. Thus, the cell block or the monobloc battery is cooled by the circulation of a liquid preferably (not shown).

[0053] In summary, the monobloc battery or the cell block is fixed directly to the storage tank of an energy fluid, in particular a pressurized energy fluid. Thus, the tank fixed to the body is used as a support for the battery. Thanks to the solution, the storage volume of dihydrogen, if necessary, is maximized. As mentioned, in particular the extensions 16 and the upper part 17 of the tank compensate for the loss of volume created by the presence of the cavity 15 for receiving the battery. Given the embodiment of the tank 10 in composite materials and the presence of wells creating reinforcements of the structure of the tank, the tank is robust, rigid, solid so that it can both withstand a very high internal pressure compatible with the storage of dihydrogen and receive the attachment of the relatively bulky and heavy traction and / or propulsion battery.The tank 10 can thus supply a fuel cell 5 equipping the vehicle 1.

[0054] Since the tank adapts, conforms to, and follows the shape(s) under the structure of the vehicle, particularly between the axles, the volume available to accommodate the tank is substantial. Note that the presence of the wells facilitates the attachment of the battery, so that little or no modification of the tank is necessary to accommodate the battery. Indeed, only the tapped or threaded inserts allow the attachment of the monobloc battery or the cell block. Since the tank is very rigid, even substantially non-deformable, and the battery, particularly monobloc, is fully housed in the cavity 15, the battery is particularly well protected, sheltered from impacts, particularly from front, rear and / or side impacts.

[0055] As mentioned previously, preferably, only small clearances, in particular in the longitudinal and transverse directions, remain between the battery and the receiving cavity 15. In other words, the volume for integrating the battery is as tight as possible, optimized, which limits the loss of volume of the tank by the creation of the cavity 15. In any case, as mentioned, the loss of volume due to the cavity 15 is made up for, compensated for, or even overcompensated by the longitudinal extensions 16 and / or the upper central part 17 above the battery.

[0056] In addition to the longitudinal wells 12 used for the passage of conduits and / or wiring 8, other longitudinal reinforcement wells, for example crossing the entire tank in the longitudinal direction, make it possible to bring wiring and / or conduits from the front to the rear of the vehicle, or vice versa. Here again, given the robustness of the tank, these cables and / or conduits are then particularly protected from any contact, in particular from tearing following contact with an element external to the vehicle.

[0057] Although the solution has been presented with a battery not protruding below the tank, alternatively the battery can protrude below the tank in the vertical direction. Alternatively again, the battery can be fixed to the tank by a vertical translation from top to bottom, i.e. fixed above the tank, and not below the tank as illustrated. In this case, a cavity to house the battery is then provided above the tank.

[0058] Although the vehicle includes a large tank for substantial storage of energy fluid in order to obtain a significant autonomy and a large traction and / or propulsion battery, these are fixed to each other which reduces the overall size. In particular, the tank is particularly shaped so as to follow the profile and the size of the body elements and the volume of the battery via a cavity. Thus, in the case of a fuel cell equipping the vehicle, the electrical energy, in particular produced by the fuel cell, is stored in the battery fixed to the tank.

[0059] Given its attachments to the side members and / or cross members, the tank preferably contributes to the rigidity of the vehicle body. The side member and / or cross member type body elements can be lightened, some of which may possibly be eliminated thanks to the rigidity provided by the tank. Thus, the body can be lightened without affecting its rigidity. The single-unit battery, or the assembly comprising the two blocks 25, 26, is preferably airtight, waterproof, so that the vehicle can cross a deep puddle of water if necessary without malfunction, in particular without electrical problems.

[0060] The robustness of the tank, particularly due to its numerous wells, makes it possible to be in close proximity to the battery without any safety concerns. In other words, although a battery is potentially flammable, particularly following a shock causing, for example, thermal runaway, and although the tank is preferably designed to store an explosive gas such as hydrogen, the strength of the tank allows it to directly support the battery.

[0061] As a remark, the solution therefore achieves the desired objective of improving the installation of an energy fluid storage tank within a vehicle comprising a traction and / or propulsion battery, in particular a motor vehicle, and has the advantages of being able to be used on other types of vehicles, namely trucks, buses, buses, agricultural vehicles, lifting equipment and any other equipment.

Claims

CLAIMS 1. Arrangement (2) for a vehicle, the arrangement (2) comprising: - a reservoir (10) intended to store an energy fluid, in particular dihydrogen, and - a traction and / or propulsion battery (20) of such a vehicle, characterized in that the battery (20) is fixed to the tank (10).

2. Arrangement (2) according to the preceding claim, characterized in that the reservoir (10) comprises a receiving cavity (15) for the battery (20), the battery (20) extending at least partially within the receiving cavity (15).

3. Arrangement (2) according to the preceding claim, characterized in that the battery (20) and the cavity (15) each extend mainly on either side of the same longitudinal and transverse plane (P20).

4. Arrangement (2) according to one of the preceding claims, characterized in that the tank (10) is obtained at least partially from composite material, in particular from composite material comprising fiberglass and / or carbon fiber.

5. Arrangement (2) according to one of the preceding claims, characterized in that the arrangement (2) comprises fixing means (30) for fixing the battery (20) to the tank (10).

6. Arrangement (2) according to the preceding claim, characterized in that the fixing means (30) comprise threaded elements (31) and tapped elements (32), the threaded elements (31) cooperating with the tapped elements (32), in particular so as to pass through the battery (20) and / or the tank (10), in particular by sandwiching them.

7. Arrangement (2) according to the preceding claim, characterized in that the reservoir (10) comprises vertical wells (11) and in that the battery (20) comprises bores (21) with vertical axes, the bores (21) being opposite vertical wells (11), the tapped elements (32) and / or the threaded elements (31) being arranged in vertical wells (11) and / or within bores (21) opposite vertical wells (11).

8. Arrangement (2) according to one of the preceding claims, characterized in that the arrangement (2) comprises conduits and / or electrical wiring (8) and in that the tank (10) comprises longitudinal wells (12), the conduits and / or electrical wiring (8) extending within longitudinal wells (12).

9. Body (3) for a vehicle, in particular for a motor vehicle (1), characterized in that the body (3) comprises an arrangement (2) according to one of the preceding claims, the body (3) comprising at least one side member (4R; 4L) and / or at least one cross member (6F; 6R), the tank (10) being fixed to the at least one side member (4R; 4L) and / or to the at least one cross member (6F; 6R).

10. Vehicle (1), in particular a motor vehicle, characterized in that it comprises a body (3) according to the preceding claim, or an arrangement (2) according to one of claims 1 to 8.

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