Energy storage housing, energy storage with an energy storage housing, and motor vehicle with an energy storage

Abstract

Energy storage housing for receiving at least one energy storage element (15), comprising a base section (13), several wall sections (20) adjoining the base section (13) at its edges, and several webs (6, 21, 22) arranged between the wall sections (20) in the form of longitudinal and transverse webs (21, 22) to form a compartment structure comprising several compartments (26), wherein the webs (6, 21, 22) are each formed by at least one lower web element (8) attached to the base section (13) and at least one upper web element (7, 17) attached to the lower web element (8), characterized in that at least a part of the longitudinal webs (21) or the transverse webs (22) are formed by lower web elements (8) with different cross-sections and / or different widths, and / or that at least a part of the longitudinal webs (21) or the transverse webs (22) are formed by upper web elements (7, 17).17) are formed with different cross-sections and / or different widths, such that different longitudinal webs (21) or different transverse webs (22) differ in their widths and / or cross-sections of the lower and / or upper web elements (8, 7, 17) to adapt their mechanical stability.

Description

[0001] The invention relates to an energy storage housing for receiving at least one energy storage element, comprising a base section, several wall sections adjoining the base section at its edges, and several webs arranged between the wall sections in the form of longitudinal and transverse webs to form a compartment structure comprising several compartments, wherein the webs are each formed by at least one lower web element attached to the base section and at least one upper web element attached to the lower web element.

[0002] In electric vehicles, energy storage elements such as batteries or accumulators are frequently used to store the electrical energy required to power the vehicle. To protect these energy storage elements from damage during operation or in the event of an accident, they are typically housed in an energy storage enclosure. In addition to ensuring the mechanical stability of the energy storage system, the enclosure can also protect the energy storage elements from environmental factors such as moisture. The size of such an enclosure depends on the number of energy storage elements to be accommodated and the available installation space in the vehicle.It is therefore desirable that energy storage housings can be designed in different sizes, whereby the protective function of the energy storage elements should exist regardless of the size of the energy storage housing.

[0003] Various methods for creating mechanically stable energy storage arrangements are known from the prior art.

[0004] German patent application DE 10 2014 225 845 A1 describes a battery arrangement for a motor vehicle in which several battery cells are arranged in a battery housing divided into compartments by bulkheads. The bulkheads are welded to the bottom of the housing or bonded to the bottom and surrounding wall elements, thus forming individual watertight chambers. The interior of the battery housing is fluidically connected to the environment by the wall elements, which at least partially have a hollow profile.

[0005] German patent application DE 10 2009 031 127 A1 discloses an electrical energy storage device comprising a plurality of flat storage cells for storing electrical energy. The storage cells are held by frame elements which are clamped together to form a stack by a clamping device. The frame elements have recesses in which measuring elements associated with each cell can be arranged to measure at least one physical quantity.

[0006] DE 10 2015 006 297 A1 describes a receiving device for an energy storage arrangement with multiple energy storage devices. The receiving device comprises a base plate on which several longitudinal and transverse ribs are arranged, forming multiple receiving compartments, each for an energy storage device. A strip with a cross-section complementary to the respective rib can be arranged on each of the transverse and / or longitudinal ribs and connected to the rib below. This strip can be used to fix an energy storage device arranged between the ribs within its receiving compartment.

[0007] US 2014 / 0014428 A1 describes a battery tray for housing energy storage devices, which includes several crossbeams arranged along the width of the vehicle. A lower section of the crossbeam is connected to the base of the battery tray, and another section of the crossbeam is arranged on top of the lower section. The lower and upper sections differ in their width and cross-section.

[0008] CN 2 05 564 850 U describes an energy storage housing that has several longitudinal and transverse struts arranged on a base section to form compartments for the energy storage devices. Each crossbeam consists of a lower support onto which a strip is placed and attached. One of these crossbeams has a strip that is partially higher than the other, identically constructed crossbeams.

[0009] US 5,501,289 A also shows an energy storage enclosure with several longitudinal and transverse beams arranged on a base section, forming a compartment structure for accommodating energy storage devices. The beams each comprise a lower and an upper beam element, each consisting of U-shaped strips that are attached to each other in reverse orientation.

[0010] Furthermore, an energy storage housing for receiving energy storage devices is also known from CN 1 06 299 192 A, which has an internal compartment structure formed by longitudinal and transverse webs with individual compartments for receiving the energy storage devices.

[0011] DE 10 2015 111 749 A1 describes a battery system for a vehicle that is at least partially electrically powered. The battery system comprises a plurality of battery modules, each with at least one battery cell, and a receiving device for receiving the battery modules. The receiving device includes a bulkhead located below the battery modules and a base plate located below the bulkhead. The bulkhead and the base plate are attached to at least one connecting element and are spaced apart from each other by the connecting element.

[0012] The invention is based on the objective of providing an improved energy storage housing.

[0013] To solve this problem, the invention provides that at least part of the longitudinal webs or transverse webs of lower web elements are formed with different cross-sections and / or different widths, and / or that at least part of the longitudinal webs or transverse webs of upper web elements are formed with different cross-sections and / or different widths, such that different longitudinal webs or different transverse webs differ in their widths and / or cross-sections of the lower and / or upper web elements to adapt their mechanical stability.

[0014] The advantage of the invention according to the invention lies in the fact that the structure of the webs can be adapted depending on the forces they are to absorb or dissipate. The division into upper and lower web elements allows the use of upper and lower web elements with different diameters, so that different mechanical stability, for example, resistance to buckling, can be achieved for the various web elements of a single web. Furthermore, it is possible, for example, to arrange webs with greater mechanical stability at the edges of the compartment structure of the energy storage housing, while webs with lower mechanical stability can be arranged in the interior, where a force acting on a wall section is distributed over a larger section of the energy storage housing by absorbing or dissipating it through the webs.The mechanical stability of a web can be adjusted, for example, by changing the width of the web elements and / or their respective cross-sections. Using webs formed from elements with a smaller cross-sectional area or width in areas with lower forces allows for weight savings compared to exclusively using webs with a constant, larger width or cross-sectional area.

[0015] The webs can be arranged between the wall sections in such a way that the compartment structure they form abuts the wall sections at their edges. The compartments of the compartment structure are bounded laterally by the webs or by the webs and the wall sections. The bottom section of the energy storage housing forms the lower boundary of the compartments. Several webs of a compartment structure can, for example, share a common lower web element, with each individual web being formed by this common lower web element and an upper web element. Alternatively, it is also possible for the webs to share a common upper web element and be formed by this common upper web element and a lower web element.

[0016] According to the invention, it can be provided that several upper web elements are arranged one above the other on at least one lower web element. By arranging several upper web elements one above the other, not only the height of the web thus formed but also the mechanical stability of the web can be further influenced. In this way, the mechanical stability of a web can be distributed across more than two planes.

[0017] According to the invention, at least some of the webs are formed by lower and / or upper web elements with different cross-sections and / or widths. By selecting the width and / or cross-section of a web element, its resistance to buckling under a force acting in the longitudinal direction of the web can be determined. This can be adjusted separately for the lower and upper web elements of a web. Web elements with different cross-sections can have different cross-sectional shapes and / or different cross-sectional areas.

[0018] According to the invention, at least part of the lower web elements may have base sections for attaching energy storage elements. These can be, for example, tab-like base sections to which the energy storage elements can be attached, for example, by screwing. The energy storage elements can be, for example, batteries or accumulators, and such an energy storage element can be screwed to, for example, a housing surrounding the energy storage element with one or more base sections of one or more webs.

[0019] According to the invention, the lower web element can have a rectangular, C-shaped, or U-shaped cross-section. A web element with a C-shaped or U-shaped cross-section is arranged on the base section, in particular, such that the opening of the C-shaped or U-shaped cross-section faces the base section. An upper web element can then be arranged on the side of the C-shaped or U-shaped cross-section opposite the base section. Similarly, a web element with a rectangular cross-section can be arranged with one edge of the rectangular cross-section on the base section, and at least one upper web element can then be arranged on the opposite side of the rectangular cross-section.

[0020] In a further embodiment of the invention, the upper web element may have a lower section, a middle section, and an upper section, with the lower section being attached to the lower web element. The lower section of an upper web element may, for example, be shaped like a base or a foot, so that the upper web element can be attached to a lower web element by its lower section. A middle section adjoins the side of the lower section opposite the lower web element, and an upper section of the upper web element adjoins the middle section.

[0021] Furthermore, according to the invention, the upper section can be wider than the middle section. The lower section of the upper web element can also be wider than the middle section. The height of the middle section, for example, can influence the overall height of the web. The increasing width of the upper web element in the upper section allows the web to buckle in the direction of its width when a specific force is applied along its length.

[0022] According to the invention, the web elements can be made of sheet metal, in particular aluminum or steel. Specifically, lower and / or upper web elements can each be formed from one or more folded sheet metal parts that are attached to one another. The fastening of sheet metal parts to form lower and / or upper web elements can be achieved, for example, by screwing, riveting, welding, or bonding. By using differently bent or folded sheet metal parts, the width and / or cross-section of the lower and / or upper web elements can be adjusted.

[0023] In a preferred embodiment of the invention, the webs can be arranged as transverse and longitudinal webs to form a compartment structure, wherein the compartments enclosed by the webs are rectangular. Preferably, in an energy storage housing with a compartment structure of rectangular compartments, the bottom section of the energy storage housing also has a rectangular shape. However, it is also possible that, in a compartment structure comprising rectangular compartments, the bottom section has a different shape, in which case the compartments bounded by wall sections and webs can, depending on the shape of the bottom section, also have a shape other than rectangular.

[0024] According to the invention, it can be provided that the fastening of the at least one lower web element to the bottom section, the fastening of the at least one upper web element to the lower web element(s) and / or the fastening of the upper web elements to each other is carried out by screwing, welding, riveting or gluing.

[0025] An energy storage device according to the invention comprises an energy storage housing, wherein one or more energy storage elements are arranged in the compartments of the compartment structure. The energy storage elements are arranged on the bottom section between the webs forming the compartment structure. In particular, it can be provided that one energy storage element is arranged in each compartment of the compartment structure.

[0026] A motor vehicle according to the invention is provided to include an energy storage device according to the invention. The energy storage elements of the energy storage device can, for example, serve to store the electrical energy required for an electric drive of the motor vehicle. The energy storage elements can, in particular, be batteries or accumulators.

[0027] Further advantages and details of the invention will become apparent from the exemplary embodiments described below and from the drawings. These show: Fig. 1 a side view of a motor vehicle according to the invention, Fig. 2 a side view of a jetty, Fig. 3 a cutaway side view of an energy storage housing according to the invention, Fig. 4 a side view of a web comprising several superimposed upper web elements, as well as Fig. 5 a supervisor of an energy storage device according to the invention.

[0028] The in Fig. The motor vehicle 1 shown in Figure 1 has an energy storage device 2, which comprises an energy storage housing 3 and energy storage elements (not shown) arranged in this energy storage housing 3. The energy storage elements arranged inside the energy storage housing 3 are connected via electrical connecting means 4 to a drive motor 5 of the motor vehicle 1, which is designed as an electric motor.

[0029] In Fig. Figure 2 shows a side view of a web 6 of an energy storage housing 3 according to the invention. The web 6 comprises an upper web element 7 and a lower web element 8. The upper web element 7 consists of two parts 9 attached to one another. The parts 9 can each consist, for example, of a bent metal sheet. Due to the shape of the parts 9, the upper web element 7 forms an upper section 10, a middle section 11, and a lower section 12. In the middle section 11, the two parts 9 of the upper web element 7 abut each other, so that the middle section 11 has a narrower web width than the upper section 10. The upper web element 7 is attached to the lower web element 8 by the base-shaped lower section 12.In this embodiment, the lower web element 8 has a C-shaped cross-section, arranged such that the opening of the C-shaped cross-section faces a base section 13 of the energy storage housing 3. The lower web element 8 is attached to the base section 13 of the energy storage housing 3.

[0030] The upper web element 7 (or the two parts 9), the lower web element 8, and the base section 13 can be made of sheet metal, for example, aluminum or steel. The two parts 9 are fastened to form the upper web element 7, and the lower section 12 is fastened to the lower web element 8, and the lower web element 8 is fastened to the base section 13, for example, by welding. Alternatively, fastening can also be achieved by screwing, riveting, or bonding. Due to the different web widths of the lower web element 8, the middle section 11, and the upper section, the upper web element 7 and the lower web element 8 exhibit different mechanical stability with respect to forces acting on the web 6 in the longitudinal direction.

[0031] In Fig. Figure 3 shows an alternative embodiment of a web 6 of an energy storage device 2 according to the invention. In this embodiment, the lower web element 8 comprises tab-like base sections 14 for attaching adjacent energy storage elements 15. The energy storage elements 15 can be attached, for example by screwing (not shown here), via bores 16 provided in the base sections 14. In this embodiment, the lower web element 8 can also be attached to the base section 13 in the area of ​​the contact surface between the base sections 14 and the base section 13.

[0032] Fig. Figure 4 shows a side view of a further embodiment of a web 6 of an energy storage housing 3 according to the invention. In this embodiment, the web 6 comprises a second upper web element 17, which is attached to the first web element 7. The upper web element 7 is in turn attached by its lower section 12 to two lower web elements 8. The upper web elements 7, 17 are arranged one above the other, with the upper web element 17 being attached to the upper web element 7 via the lower section 18 of the upper web element 7 to the upper section of the web element 7. The upper web element 17 has an upper section 19, which has a narrower web width than the upper section 10 of the upper web element 7. In addition to the Fig. In the embodiment shown in section 4, arrangements are conceivable in which more than two upper web elements 7, 17 are arranged one above the other. Such an arrangement makes it possible to design the mechanical stability for each of the web elements forming the web individually across the web width and / or the cross-section.

[0033] In Fig. Figure 5 shows a top view of an energy storage device 2 according to the invention. The energy storage device 2 comprises an energy storage housing 3 according to the invention and several energy storage elements 15. The energy storage housing 3 comprises the bottom section 13, the wall sections 20, longitudinal webs 21, and transverse webs 22. The longitudinal webs 21 are arranged in the energy storage housing 3 such that their two end faces abut opposite wall sections 20. In this embodiment, the longitudinal webs 21 are each formed by a lower web element and an upper web element of the same width. Transverse webs 22 are arranged between the longitudinal webs 21 and between the longitudinal webs 21 and the wall sections 20. These transverse webs are formed by lower web sections 23 and upper web sections 24, 25.The lower sections 23 of the crossbars 22 have the same width for all crossbars 22, whereas the upper crossbar elements 24 of the crossbars 22 arranged at the edges have a greater width than the upper sections 25 of the crossbars 22 arranged inside the compartment structure. The distribution of the crossbar widths of the upper sections 24, 25 can be designed depending on the force distribution when a force acts laterally on the energy storage housing 3. The longitudinal webs 21, the crossbars 22, and the wall sections 20 of the energy storage housing 3 define several compartments 26, in each of which an energy storage element 15 is arranged.

[0034] The representation of the energy storage housing 3 in Fig.Figure 5 is purely schematic; in particular, it may be provided that an energy storage housing 3 comprises a larger number of longitudinal ribs 21 and / or transverse ribs 22, so that a compartment structure comprising more compartments 26 is formed. Especially in larger arrangements, the width of upper and lower rib elements can be adjusted depending on the forces acting on the ribs when a force acts on a side surface of the housing.

Claims

[1] Energy storage housing for accommodating at least one energy storage element (15), comprising a base section (13), a plurality of wall sections (20) adjoining the base section (13) at the edge, and a plurality of webs (6, 21, 22) arranged between the wall sections (20) in the form of longitudinal and transverse webs (21, 22) to form a compartment structure comprising a plurality of compartments (26), wherein the webs (6, 21, 22) are each formed by at least one lower web element (8) which is fastened to the base section (13) and at least one upper web element (7, 17) fastened to the lower web element (8), characterized bythat at least some of the longitudinal webs (21) or the transverse webs (22) are formed by lower web elements (8) with different cross sections and / or different widths and / or that at least some of the longitudinal webs (21) or the transverse webs (22) are formed by upper web elements (7, 17) with different cross sections and / or different widths, such that different longitudinal webs (21) or different transverse webs (22) differ in their widths and / or cross sections of the lower and / or upper web elements (8, 7, 17) in order to adapt their mechanical stability. [2] Energy storage housing according to claim 1, characterized by that several upper web elements (7, 17) are arranged one above the other on at least one lower web element (8). [3] Energy storage housing according to claim 1 or 2, characterized bythat at least some of the lower web elements (8) have base sections (14) for fastening energy storage elements (15). [4] Energy storage housing according to one of the preceding claims, characterized by that the lower web element (8) has a rectangular, C-shaped or U-shaped cross-section. [5] Energy storage housing according to one of the preceding claims, characterized by that the upper web element (7, 17) has a lower section (12), a middle section (11) and an upper section (10), wherein the lower section is fastened to the lower web element (8). [6] Energy storage housing according to claim 5, characterized by that the upper section (10) has a greater width than the middle section (11). [7] Energy storage housing according to one of the preceding claims, characterized by that the web elements (7, 8) are made of sheet metal, in particular of aluminum sheet or steel sheet. [8] Energy storage housing according to one of the preceding claims, characterized by that the compartments (26) enclosed by the transverse webs and the longitudinal webs (6, 21, 22) are rectangular. [9] Energy storage housing according to one of the preceding claims, characterized by that the fastening of the at least one lower web element (8) to the base section (13), the fastening of the at least one upper web element (7, 17) to the lower web element(s) (8) and / or the fastening of the upper web elements (7, 17) to one another is carried out by screwing, welding, riveting or gluing. [10] Energy storage device comprising an energy storage housing (3) according to one of the preceding claims, wherein one or more energy storage elements (15) are arranged in the compartments (26) of the compartment structure. [11] Motor vehicle comprising an energy storage device (2) according to claim 10.

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