Battery module container and associated electrical power storage system

Abstract

Battery Module Container and Associated Electrical Power Storage System. The container (12) includes a battery module receiving structure (30) for the battery modules (16), comprising upper corner pieces (70) mounted on the upper corners of the peripheral walls (36) of the structure (30). The structure (30) further includes a roof (40) extending between the upper corners. The roof (40) includes a water drainage region (80), comprising at least two slopes (82A to 82D) inclined between a lower edge and at least one upper point (86) common to both inclined slopes (82A to 82D), to allow water received on each of the inclined slopes (82A to 82D) to flow towards their lower edge. The water drainage region (80) is located in or below a plane (P) defined by the upper surfaces (72) of the upper corner pieces (70). Figure for the abstract: Figure 1

Description

Title of the invention: Battery module container and associated electrical power storage system

[0001] The present invention relates to a battery module container, comprising a battery module receiving structure, the structure comprising a floor, peripheral walls extending vertically to the periphery of the floor and defining upper corners, upper corner pieces mounted on the upper corners and projecting above the upper edges of the peripheral walls, the upper corner pieces each having an upper surface, the structure further comprising a roof extending between the upper corners, the roof, the peripheral walls, and the floor delimiting an internal volume for storing battery modules.

[0002] Such a container is intended to contain battery modules to provide a movable source of electrical power, suitable for temporary or permanent installation at a site requiring electrical power.

[0003] Conventionally, it is known to construct an electrical power storage system by placing battery modules and an electrical and thermal management unit for the modules in a standard rectangular container. This storage system is easily transportable, particularly by road, rail, sea, or air.

[0004] The structure of the container receiving the battery modules generally comprises a floor, peripheral walls projecting from the floor, and a flat roof which closes the interior volume containing the battery modules.

[0005] Typically, the container is equipped with corner pieces at its upper and lower corners. The lower corner pieces protrude downwards from the floor, and the upper corner pieces protrude from the roof. Thus, the container can be placed under another container, with the lower corner pieces of the other container resting against the upper corner pieces of the container.

[0006] Such a container is not entirely satisfactory when placed outdoors. Because the container's roof is flat, rainwater falling on the roof is likely to pool above the container. This pooling occurs particularly in the center of the container, especially in areas furthest from the lateral edges of the roof.

[0007] Stagnation of rainwater can in some cases cause premature wear of the container, in particular by promoting oxidation, or even by creating holes which communicate with the internal volume containing the battery modules. This can be detrimental to the proper functioning of the container, since the battery modules are sensitive to water. Furthermore, the container's aesthetic appearance is degraded.

[0008] To overcome this problem, it is known, for example, from CN212461856U, to have a sloping roof over the container that prevents rainwater from pooling when it falls on the container.

[0009] Such a solution effectively protects the container. However, it is not satisfactory, as the container can only be transported above a stack of containers, without the possibility of having additional containers stacked on top of it. The sloping roof increases transport costs and makes handling the container more difficult.

[0010] To avoid problems during transport, the pitched roof according to CN212461856U cannot therefore be installed during the assembly of the storage system and must only be installed once the container is on site.

[0011] One object of the invention is therefore to obtain a battery module container which is very weather-resistant, while being simple and inexpensive to transport.

[0012] To this end, the invention relates to a container of the aforementioned type, characterized in that the roof comprises at least one water drainage region, the water drainage region comprising at least two inclined sides between a lower edge and at least one upper point common to the two inclined sides, to allow a flow of water received on each of the inclined sides towards their lower edge, the water drainage region being located in or below a plane defined by the upper surfaces of the upper corner pieces.

[0013] The container according to the invention may comprise one or more of the following features, taken individually or in any technically possible combination:

[0014] - the peripheral walls comprise two opposing longitudinal walls, extending along a longitudinal axis of the container, and two transverse walls, extending perpendicularly to the longitudinal axis, at least two inclined sides being longitudinal inclined sides inclined in opposite directions towards the opposite longitudinal walls;

[0015] - the roof has at least four sloping sides, at least two of which are sloping sides being transverse inclined panels sloping in opposite directions towards the transverse walls;

[0016] - the four inclined sides have a pyramidal shape, the upper point being common to all inclined sides, and forming the apex of the pyramid;

[0017] - two inclined surfaces have a common upper edge, the common upper edge of ending with a plurality of common superior points;

[0018] - the structure comprises at least one structural support surface extending between two peripheral walls beneath the two sloping sides, the structure also comprising at least one reinforcing spacer interposed between the structural support surface and at least one of the inclined sections;

[0019] - the structure includes a roof support frame comprising at least one a longitudinal member extending along a longitudinal axis of the container, and / or at least one cross member, extending transversely with respect to the longitudinal axis of the container, the structural support surface extending over the longitudinal member and / or over the cross member;

[0020] - the roof further comprises at least one non-sloping region adjacent to the region water drainage;

[0021] - the roof comprises two non-sloping regions located on either side of the region water drainage;

[0022] - the roof is devoid of a non-sloping region;

[0023] - a non-sloping region of the roof and / or at least one sloping face defines at least one through opening for evacuating overpressure in the interior volume, the roof having a deflagration panel attached to the through opening, the deflagration panel being capable of at least partially releasing the through opening during an overpressure exceeding a given threshold in the interior volume;

[0024] - the peripheral walls delimit lower corners, the structure comprising lower corner pieces mounted under the lower corners, positioned directly above the upper corner pieces;

[0025] - the structure comprises a layer of thermal insulation disposed at least under the sloping sides.

[0026] The invention also relates to an electrical power storage system, comprising:

[0027] - a container as defined above;

[0028] - battery modules received in the internal volume;

[0029] - terminals, connected to the battery modules and intended to connect to a consumer of electrical power supplied by the battery modules and / or to an electrical power supplier for recharging the battery modules.

[0030] The system according to the invention may include the following feature:

[0031] - the structure includes an internal partition separating the interior volume for delineate a control room receiving at least one battery module management system, and at least one storage room receiving the battery modules.

[0032] The invention will be better understood upon reading the following description, given solely by way of example, and made with reference to the accompanying drawings, in which:

[0033] - [Fig. 1] Fig. 1 is a perspective view of a first movable system of electrical energy storage comprising a container of battery modules according to the invention, the container being partially open;

[0034] - [Fig.2] Fig.2 is a perspective top view of the roof of the container. [Fig.l];

[0035] - [Fig.3] Fig.3 is a schematic view representing an example of a framework of support of the roof of the container of the [Fig.l];

[0036] - [Fig.4] [Fig.4] is a schematic view illustrating reinforcing spacers of the inclined sides of the roof of the [Fig.l], allowing an operator to walk on the container;

[0037] - [Fig. 5] [Fig. 5] is a view analogous to [Fig. 3] of a container roof of a second electrical energy storage system according to the invention;

[0038] - [Fig.6] [Fig.6] is a view analogous to [Fig.2] of a container roof of a third electrical energy storage system according to the invention.

[0039] In all that follows, orientations are generally defined with respect to the position of a container placed on a horizontal flat surface. In particular, the terms "under", "below", "on", "above" are generally understood with respect to this position of the container.

[0040] A first electrical energy storage system 10 according to the invention is illustrated by [Fig.1].

[0041] The storage system 10 is intended to be transported to a site of use, for example by a road vehicle such as a truck, by a rail vehicle, and / or by a maritime vehicle such as a transport vessel. It is intended to be electrically connected to an electrical power grid at a site of use and, alternatively, to an electrical power supply grid for recharging.

[0042] As illustrated by [Fig.1], the storage system 10 comprises a container 12 of battery modules, delimiting an internal volume 14, and a plurality of battery modules 16 received in the internal volume 14. The storage system 10 advantageously comprises an electrical and thermal management system 18 for the battery modules 16 (“Battery Management Module” or “BMM” in English) and a safety system 20.

[0043] In this example, the container 12 contains, for example, between 10 and 150 battery modules 16. The battery modules 16 are arranged in columns and rows. They are connected in series and / or parallel to deliver to at least two electrical terminals 22 present on the container 12, an electrical power of up to 4 MWh for voltages up to 1500 V.

[0044] Each battery module 16 comprises a plurality of electrochemical cells, for example received in prismatic or cylindrical housings or in flexible pouches. Each electrochemical cell comprises anodes, cathodes and separators, between which electrochemical reactions take place.

[0045] The management system 18 is designed to control the voltage and current delivered by each battery module 16 during the supply of electrical power, and the power and current intensity delivered to each battery module 16, during the recharging of the battery modules 16.

[0046] The electrical terminals 22 are intended to connect to the user network (not shown) for the supply of electrical energy stored in the battery modules 16, and alternatively, to an electrical power supply network, for the recharging of the battery modules 16.

[0047] The safety system 20 includes, for example, sensors (not shown) for detecting temperature and / or pressure in the internal volume 14, an inert gas source 24, and a control unit 25, suitable for delivering the inert gas into the internal volume 14 from the inert gas source 24, upon detection of an increase in temperature and / or pressure exceeding a given threshold in the internal volume 14.

[0048] In the example shown in [Fig.1], the container 12 includes a self-supporting structure 30, intended to define the internal volume 14, and to allow the joint transport of the battery modules 16, the module management system 18, and the security system 20 to a site of use.

[0049] The structure 30 comprises a floor 32 mounted on a floor support 34. It comprises peripheral walls 36 projecting from the periphery of the floor 32, the peripheral walls 36 being supported by vertical pillars 38 at the corner of the walls 36. It further comprises a roof 40 supported by a support frame 42 visible in particular on [Fig.3].

[0050] The structure 30 of the container 12 is here of polyhedral form. In particular, the structure 30 has the form of a rectangular parallelepiped, extending longitudinally along a longitudinal axis A-A' which is horizontal when the container 12 is placed on a horizontal support.

[0051] Container 12 has, for example, a length greater than 2 m, in particular between 2.5 m and 15 m, a width greater than 1 m, in particular between 2 m and 4 m and a height greater than 1 m, in particular between 2 m and 4 m.

[0052] Container 12 is in particular a so-called "High Cube" 12-foot container with a length of 6.058 m, a width of 2.438 m and a height of 2.896 m. However, the present invention applies to any type of container having ISO corners (e.g. 40 feet (12 m), 10 feet (3 m), etc.).

[0053] The floor 32 is flat here. It supports the battery modules 16, the management system 18, and the security system 20 when present. The floor 32 delimits the interior volume 14 downwards.

[0054] The floor support 34 comprises, for example, beams, in particular of the IPN type, extending longitudinally along the edges of the structure 30, and at the longitudinal ends of the structure 30, transverse crossbeams connecting the longitudinal beams.

[0055] The floor 32 is mounted in support on the floor support 34. The floor support 34 is for example suitable to be gripped by gripping devices of a crane, in order to lift the container 12 and move it.

[0056] The floor support 34 is provided with lower corner pieces 46 extending at each corner defined between two adjacent peripheral walls 36.

[0057] The lower corner pieces 46 have a lower surface 48 intended to rest on the ground or on another support, the floor 32 then being located above the ground or the support.

[0058] In this example, each lower corner piece 46 is located under a vertical pillar 38.

[0059] The peripheral walls 36 comprise two longitudinal vertical walls 50A, 50B (wall 50B has been removed from [Fig.1], but is visible in particular on [Fig.3]), the longitudinal walls 50A, 50B being arranged vertically, parallel to the axis A-A', on either side of the axis A-A'.

[0060] The peripheral walls 36 further comprise two transverse vertical walls 52C, 52D extending perpendicularly to the axis A-A' and connecting the longitudinal walls 50A, 50B to each other at the longitudinal ends of the structure 30.

[0061] The longitudinal walls 50A, 50B and the transverse walls 52C, 52D delimit two by two the corners of the structure 30. They delimit the interior volume 14 on the outside.

[0062] The longitudinal walls 50A, 50B and possibly the transverse walls 52C, 52D are fitted with movable doors allowing for example to provide access to the interior volume 14 from outside the container 12.

[0063] Advantageously, the structure 30 also includes an internal partition 54 to the internal volume 14, delimiting in the internal volume 14 a room 56 for storing the battery modules 16, and separately, a control room 58, receiving the management system 18 and the security system 20.

[0064] Advantageously, at least one door provided in a peripheral wall 36 allows access to the storage room 56, without having to open the control room 58, and at least one other door allows access to the control room 58, without having to open the storage room 56.

[0065] With reference to [Fig.3], the support frame 42 comprises a plurality of stringers 60, and advantageously a plurality of crossbeams 62 connecting the stringers 60 transversely to each other.

[0066] At least two lateral stringers 60 connect the pillars 38 parallel to the axis A-A'. At least two end cross members 62 connect the pillars 38 transversely to the axis A-A'.

[0067] In this example, the support frame 42 further comprises at least one additional stringer 60A arranged between the side stringers 60, and several additional cross members 62B arranged between end cross members 62. The stringers 60, 60A and the cross members 62, 62B define, under the roof 40, at least one bearing surface 64 supporting the roof 40.

[0068] The longitudinal members 60 and the cross members 62 are dimensioned to allow the support of the roof 40 and at least one equipped human being walking on the roof, the equipped human being weighing for example 100 kg.

[0069] The support frame 42 further includes upper corner pieces 70 intended to project above the vertical pillars 38, above the roof 40. The corner pieces 70 define a flat upper surface 72, which is horizontal when the axis A-A' is horizontal.

[0070] As can be seen in Figures 1 and 3, the upper surfaces 72 of the corner pieces 70 define an upper plane P of the container 12, with no element of the container 12 protruding beyond the upper plane P.

[0071] The roof 40 is preferably made of metal, in particular steel, and is advantageously covered with a protective coating, in particular anti-rust paint.

[0072] According to the invention, in the example of [Fig.2], the roof 40 of the structure 30 comprises a central water drainage region 80, provided with at least two inclined sides 82A to 82D and advantageously, two non-inclined regions 84, located longitudinally on either side of the central region 80.

[0073] The central region 80 extends over a length of at least 10%, preferably at least 20%, of the length of the roof 40, taken along the axis A-A'.

[0074] In the example shown in [Fig.1], the central region 80 comprises four inclined sides 82A to 82D defining a pyramid.

[0075] With reference to [Fig.2], the central region 80 thus comprises two longitudinal inclined faces 82A, 82B, with inclinations directed laterally, respectively towards the longitudinal walls 50A, 50B, and two transverse inclined faces 82C, 82D with inclinations directed longitudinally, respectively towards the transverse walls 52C, 52D.

[0076] Each inclined panel 82A to 82D here has a substantially triangular shape defining a common upper point 86 for the four inclined panels 82A to 82D.

[0077] Each inclined panel 82A to 82D has a lower edge 88 and two edges 90, 92 converging from the ends of the lower edge 88 to the upper point 86.

[0078] The lower edges 88 of the longitudinal inclined panels 82A, 82B extend along the respective longitudinal walls 50A, 50B, above these walls, in particular on the upper surface defined by the longitudinal stringers 60.

[0079] The lower edges 88 of the transverse inclined panels 82C, 82D extend parallel to the transverse walls 52C, 52D, preferably opposite a cross member 62. They delimit, towards the center of the roof 40, the non-inclined regions 84.

[0080] The central water drainage region 80 is located totally in and below the upper plane P defined by the upper surfaces 72 of the upper corner pieces 70 or totally below the upper plane P. It does not protrude above the upper plane P.

[0081] Thus, the upper point 86 is located in the plane P, or below the plane P when the container 12 rests horizontally on a horizontal support.

[0082] With reference to [Fig.4], the height H1 of the upper point 86, taken vertically from the bearing surface 64 defined on the stringers 60, is less than or equal to the height H2 of the upper surfaces 72 of the upper corner pieces 70, taken vertically from the bearing surface 64.

[0083] The height H2 is between 20 mm and 30 mm. The height H1 ensures that a distance of at least 5 mm is maintained below the plane P.

[0084] Thus, the central water drainage region 80 does not interfere with an additional container which would be placed by its lower corner pieces on the upper corner pieces 70 of the container 12.

[0085] The angle of inclination of each inclined panel 82A to 82D with respect to a horizontal plane is for example less than 10°, and in particular between 1° and 5° for the usual dimensions of a container 12.

[0086] The area occupied by the inclined sections 82A to 82D of the central water drainage region 80 is thus advantageously greater than at least 3% of the total area of ​​the roof 40, the areas being taken in projection in a horizontal plane.

[0087] Advantageously, to reinforce the rigidity of the central region 80, and in particular the rigidity of each inclined panel 82A to 82D, the roof 40 includes reinforcing struts 94, extending between the bearing surface 64 and a lower surface of the inclined panel 82A to 82D.

[0088] In the example shown in [Fig.2], the roof 40 includes at least one spacer 94 located between the bearing surface 64 and each inclined section 82A to 82D, preferably at least two spacers 94 spaced apart, interposed between the bearing surface 64 and each inclined section 82A to 82D.

[0089] For the longitudinal inclined panels 82A, 82B, the spacers 94 are arranged on a bearing surface 64 defined by a cross member 62. For the transverse inclined panels 82C, 82D, the spacers 94 are arranged on the bearing surface 64 defined by a stringer 60, in particular by a central stringer parallel to the axis A-A'.

[0090] Thanks to the presence of spacers 94 located under the inclined surfaces 82A, 82B, the central water drainage region 80 is able to support an operator equipped with their equipment (for example, weighing 100 kg with their equipment), without deformation of the inclined panels 82A, 82B. In addition, the shape and inclination of the transverse inclined panels 82C, 82D reinforces the structural rigidity of the water drainage area 80, allowing the operator to walk on the roof 40, without buckling of the inclined panels 82A to 82D.

[0091] With reference in particular to [Fig. 1], each non-inclined region 84 comprises at least one horizontal roof panel 100 extending longitudinally between the upper edge of a respective transverse wall 50C, 50D and the central water drainage region 80 and extending transversely between the upper edges of the longitudinal walls 50A, 50B.

[0092] Each non-inclined region 84 defines at least one through opening 102 for overpressure relief in the internal volume 14, and for each through opening 102, a deflagration plate 104 attached to the roof panel 100 around the perimeter of the through opening 102, to seal the through opening 102 in a watertight manner, in the absence of overpressure exceeding a calibrated threshold in the internal volume 14.

[0093] The roof panel 100 is supported by the bearing surfaces 64 defined on the longitudinal members 60 and the cross members 62.

[0094] In this example, each through opening 102 passes vertically through the roof panel 100. The roof panel 100 here has two parallel through openings 102, located on either side of the axis A-A', in projection into a horizontal plane.

[0095] Each through opening 102 here has a contour which is for example polygonal, in particular rectangular.

[0096] The deflagration plates 104 are attached to the periphery of the through openings 102. The attachment is configured to define the calibrated overpressure threshold beyond which the deflagration plate 104 opens to partially release the through opening 102, and decrease the pressure inside the internal volume 14.

[0097] Each roof panel 100, and each deflagration plate 104 attached to the roof panel 100 is located below the upper plane P defined by the upper surfaces 72 of the upper corner pieces 70. In addition, the deflagration plates 104 have an upper surface located vertically below the upper point 86 of the inclined faces 82A to 82D.

[0098] Thanks to the presence of the central water drainage region 80, rainwater falling at the level of the central water drainage region 80 is naturally evacuated towards the lateral edges of the container 12 by means of the inclined sides 82A, 82B, and away from the center of the roof 40 by means of the inclined sides 82C, 82D.

[0099] Thus, the accumulation of water in the center of the roof 40 is eliminated, or at least very significantly reduced. This limits the risks of water stagnation, and therefore of The roof of container 12 is graded at its center by 40 degrees. This prevents the formation of corrosion-induced holes that could compromise the watertightness of container 12.

[0100] The container 12 therefore has a longer lifespan and increased reliability of the battery modules 16 it contains, since these are not exposed to moisture. In addition, it has an improved external aesthetic appearance, even when subjected to inclement weather.

[0101] Since the central water drainage area 80 is located below the plane P defined by the upper surfaces 72 of the upper corner pieces 70, it does not interfere with the normal transport of the container 12. In particular, the container 12 can be transported under other containers in a stack of containers, receiving, on its upper corner pieces 70, the lower corner pieces of another container. This notably allows its loading onto ships, thus reducing transport costs.

[0102] In one variant, visible in [Fig.5], the longitudinal inclined panels 82A, 82B have, when projected onto a horizontal plane, a greater area than the transverse inclined panels 82C, 82D. The area of ​​the longitudinal inclined panels 82A, 82B is in particular greater than 200% of the area of ​​the transverse inclined panels 82C, 82D.

[0103] The longitudinal panels 82A, 82B delimit between themselves a horizontal upper edge 120, extending parallel to the axis A-A' and defining a plurality of upper points 86 of the central water drainage region 80. The upper edge 120 extends between the edges 88, 90 of each panel 82A, 82B.

[0104] As before, the upper edge 120 thus defined is located in the plane P, or below the plane P defined by the upper surfaces 72 of the upper corner pieces 70.

[0105] The longitudinal inclined panels 82A, 82B thus have a trapezoidal contour, while the transverse longitudinal panels have a triangular contour.

[0106] Such an arrangement optimizes the flow towards the longitudinal walls 50A, 50B, and not towards the non-inclined regions 84. Water stagnation is therefore even more limited.

[0107] In the variant illustrated in [Fig.6], the roof 40 is devoid of a non-sloping region 84.

[0108] The water drainage area 80 extends over the entire length and width of the roof 40.

[0109] In this example, when projected onto a horizontal plane, the area occupied by the transverse inclined panels 82C, 82D is preferably less than 10% of the area occupied by the longitudinal inclined panels 82A, 82B.

[0110] As before, the entire water drainage area 80, including the upper edge 120, is located in or below plane P.

[0111] In this variant, the through openings 102 for overpressure relief are cut directly into the inclined panels 82A, 82B and the deflagration plates 104 are attached to the inclined panels 82A, 82B around the perimeter of the through openings 102, as described previously.

[0112] In one embodiment, a layer of thermal insulation, for example a fibrous layer made of rock wool, is placed under the roof 40, in particular, in the volume delimited between the bearing surface 64 and the sloping sides 82A to 82D. This embodiment promotes the thermal insulation of the battery modules 16, particularly when the temperature increases outside the energy storage system 10.

Claims

Claims

1. Container (12) for battery modules (16), comprising a structure (30) for receiving the battery modules (16), the structure (30) comprising a floor (32), peripheral walls (36) extending vertically at the periphery of the floor (32) and defining upper corners, upper corner pieces (70) mounted on the upper corners and projecting above the upper edges of the peripheral walls (36), the upper corner pieces (70) each having an upper surface (72), the structure (30) further comprising a roof (40) extending between the upper corners, the roof (40), the peripheral walls (36), and the floor (32) delimiting an interior volume (14) for storing battery modules (16), characterized in that the roof (40) comprises at least one water drainage region (80),the water drainage region (80) comprising at least two inclined sides (82A to 82D) between a lower edge (88) and at least one upper point (86) common to the two inclined sides (82A to 82D), to allow a flow of water received on each of the inclined sides (82A to 82D) towards their lower edge (88), the water drainage region (80) being located in or under a plane defined by the upper surfaces (72) of the upper corner pieces (70), and in that the structure (30) comprises at least one structural bearing surface (64) extending between two peripheral walls (36) under the two inclined sides (82A to 82D), the structure (30) further comprising at least one reinforcing spacer (94) interposed between the structural bearing surface (64) and at least one of the inclined sides (82A to 82D) 82D).,

2. Container (12) according to claim 1, wherein the peripheral walls (36) comprise two opposite longitudinal walls (50A, 50B), extending along a longitudinal axis (A-A') of the container (12), and two transverse walls (52C, 52D), extending perpendicular to the longitudinal axis (A-A'), at least two inclined faces (82A, 82B) being longitudinal inclined faces inclined away from each other towards the opposite longitudinal walls (50A, 50B).

3. A container (12) according to claim 2, wherein the roof (40) comprises at least four inclined faces (82A to 82D), at least two inclined faces (82C, 82D) being transverse inclined faces inclined away from each other towards the transverse walls (52C, 52D).

4. Container (12) according to claim 3, wherein the four sides inclined (82A to 82D) have a pyramid shape, the upper point (86) being common to all the inclined sides (82A to 82D), and forming the top of the pyramid.

5. A container (12) according to any one of claims 1 to 3, wherein two inclined sides (82A to 82D) have a common upper edge (120), the common upper edge (120) defining a plurality of common upper points (86).

6. Container (12) according to any one of the preceding claims, in which the structure (30) comprises a framework (42) for supporting the roof (40) comprising at least one longitudinal member (60, 60A) extending along a longitudinal axis (A-A') of the container (12), and / or at least one cross member (62, 62B), extending transversely relative to the longitudinal axis (A-A') of the container (12), the structural support surface (64) extending over the longitudinal member (60, 60A) and / or over the cross member (62, 62B).

7. A container (12) according to any preceding claim, wherein the roof (40) further comprises at least one non-sloped region (84) adjacent the water drainage region (80).

8. Container (12) according to claim 7, wherein the roof (40) comprises two non-sloping regions (84) located on either side of the water drainage region (80).

9. A container (12) according to any one of claims 1 to 6, wherein the roof (40) is devoid of a non-sloping region (84).

10. Container (12) according to any one of the preceding claims, in which a non-inclined region (84) of the roof (40) and / or at least one inclined section (82A to 82D) defines at least one through opening (102) for discharging excess pressure in the interior volume (14), the roof (40) comprising a deflagration panel (104) attached to the through opening (102), the deflagration panel (104) being capable of at least partially releasing the through opening (102) in the event of excess pressure greater than a given threshold in the interior volume (14).

11. Container (12) according to any one of the preceding claims, in which the peripheral walls (36) define lower corners, the structure (30) comprising lower corner pieces (46) mounted under the lower corners while being located in line with the upper corner pieces (70).

12. Container (12) according to any one of the preceding claims, wherein the structure (30) comprises a layer of thermal insulation arranged at least under the inclined sides (82A to 82D).

13. System (10) for storing electrical power, comprising: - a container (12) according to any one of the preceding claims; - battery modules (16) received in the interior volume (14); - terminals (22), connected to the battery modules (16) and intended to be connected to a consumer of electrical power supplied by the battery modules (16) and / or to a supplier of electrical power for recharging the battery modules (16).

14. Storage system (10) according to claim 13, wherein the structure (30) comprises an internal partition (54) separating the interior volume (14) to delimit a control room (58) receiving at least one system (18) for managing the battery modules (16), and at least one storage room (56) receiving the battery modules (16).

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