Battery with outer framework

Abstract

A battery for an electric vehicle, comprising an outer frame (1) having an upper structure (2) and a lower structure (3), where the upper structure (2) is arranged above a battery interior (4) and comprises struts (5) along a longitudinal direction (51), a transverse direction (52) and a diagonal direction (53), the substructure (3) is arranged below the battery interior (4) and comprises struts (5) in a longitudinal direction (51), a transverse direction (52) and a diagonal direction (53), the struts (5) of the superstructure (2) and the substructure (3) forming a load distribution for absorbing longitudinal, transverse and torsional forces and for the longitudinal, transverse and torsional forces, the battery interior (4) is substantially free of supporting structural elements.

Description

Technical Field

[0001] The utility model relates to a battery used for an electric vehicle. Background Art

[0002] A battery with a multi-shell structure is known from DE 10 2019 131 818. The battery comprises an outer shell with struts, which are designed to mechanically support an inner shell as an exoskeleton. The feasibility of the design of the inner chamber of the battery is predetermined by the struts of the exoskeleton. Utility Model Content

[0003] In this context, an exoframe is understood to be a supporting structure applied from the outside.

[0004] A battery for an electric vehicle, comprising an exoskeleton having an upper structure and a lower structure, wherein: the upper structure is disposed above an inner cavity of the battery and comprises struts along a longitudinal direction, a transverse direction and a diagonal direction,

[0005] - a lower structure is arranged below the battery cavity and comprises struts along the longitudinal direction, the transverse direction and the diagonal direction,

[0006] - the struts of the superstructure and the substructure are formed for absorbing longitudinal, transverse and torsional forces and for distributing the load of said longitudinal, transverse and torsional forces,

[0007] - The battery interior is substantially free of supporting structural elements.

[0008] The structure according to the invention with battery and exoskeleton allows the battery to be reinforced from the outside and the corresponding important load paths to be constructed. This allows a more efficient arrangement in terms of construction, which can be used to withstand forces in the longitudinal direction, in the transverse direction and in the torsional direction, in that the diagonal struts accommodate parallel load paths and distribute the forces on the exoskeleton, wherein the battery interior is substantially free of supporting structural elements, while the battery housing simultaneously retains its structural rigidity.

[0009] Preferably, the battery interior has no stabilizing structural elements at all, since the exoskeleton is designed to direct loads above and below the battery interior. This allows for the most flexible use of the battery interior.

[0010] Preferably, the battery comprises a side frame, wherein the side frame is configured to connect the upper structure and the lower structure, wherein the upper structure, the lower structure and the side frame form the battery inner cavity. This enables the battery cells to be accommodated in a structure reinforced from the outside.

[0011] Preferably, the battery has an inner bottom, which is arranged below the battery cells. This enables the fixation of the battery cells and the integration of the thermal management system in the battery interior.

[0012] Preferably, the upper structure is connected to the side frame in one piece. The connection between the side frame and the upper structure achieves complete sealing of the contact surface.

[0013] Preferably, the substructure is connected to the side frames in a force-fitting manner. This allows a load-absorbing structure to be formed surrounding the battery interior.

[0014] Preferably, the battery has a frame fixing portion, wherein the lower structure includes the frame fixing portion, and the frame fixing portion is configured to fix the battery in the vehicle. By integrating the fixing portion directly into the battery, a packaging gain in the battery interior is achieved.

[0015] In another preferred embodiment, the battery comprises an upper shell and a lower shell, wherein the upper shell is arranged between the upper structure and the battery inner cavity, and the lower shell is arranged between the lower structure and the battery inner cavity, and the upper shell and the lower shell are configured to seal the battery inner cavity and protect the battery cells.

[0016] Preferably, the exoskeleton comprises a thermoformed sheet material. The thermoforming allows a high degree of deep drawing of the sheet material, whereby the geometric shape of the exoskeleton can be produced.

[0017] Preferably, the battery additionally comprises a supporting element connecting the upper structure and the lower structure. This enables a more stable design of the battery.

[0018] In another preferred embodiment, the exoskeleton comprises an extruded profile, wherein the extruded profile comprises metal. The high stability of the metal material enables a stable design of the exoskeleton.

[0019] In a further preferred embodiment, the exoskeleton comprises cast elements and / or foam-filled composite materials and / or stamped sheet materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] A preferred embodiment is described in detail with reference to the following drawings. Here, it is shown:

[0021] Figure 1 FIG. 1 is an exploded view showing a first embodiment of a battery according to the present invention.

[0022] Figure 2 shows a section through a first embodiment of a battery according to the invention,

[0023] Figure 3 shows a cross section of a first embodiment of a battery according to the present invention,

[0024] Figure 4 An exploded view of a second embodiment of a battery according to the present invention is shown.

[0025] Figure 5 shows a cross section of a second embodiment of a battery according to the present invention,

[0026] Figure 6 shows a cross section of a third embodiment of a battery according to the present invention, and

[0027] Figure 7 A cross section of a fourth embodiment of a battery according to the present invention is shown. DETAILED DESCRIPTION

[0028] Figure 1 , Figure 2 and Figure 3 The first embodiment of the battery for electric vehicles according to the utility model is shown. The battery includes a side frame 6 and an exoskeleton 1. The exoskeleton 1 includes an upper structure 2 and a lower structure 3. The upper structure 2 is arranged above the battery cavity 4. The lower structure 3 is arranged below the battery cavity 4. The upper structure 2 includes pillars 5 along the longitudinal direction 51, the transverse direction 52 and the diagonal direction 53. The lower structure 3 includes pillars 5 along the longitudinal direction 51 and the transverse direction 52 and the diagonal direction 53. The pillars 5 of the upper structure 2 and the lower structure 3 are configured to absorb longitudinal forces, transverse forces and torsional forces and the load distribution of the longitudinal forces, transverse forces and torsional forces. The side frame 6 is configured to connect the upper structure 2 and the lower structure 3. The upper structure 2, the lower structure 3 and the side frame 6 form a battery cavity 4 for accommodating a battery cell 7. The battery cavity 4 has no structural elements. The battery includes an inner bottom 8. The inner bottom 8 is located below the battery cell 7.

[0029] Figure 4 and Figure 5 A second embodiment of a battery according to the invention is shown. In contrast to the first embodiment, the upper structure 2 is connected in one piece to the side frame 6. The battery additionally comprises a frame fastening 9. The lower structure 3 comprises this frame fastening 9. The frame fastening 9 is designed to fasten the battery in the vehicle. All other features of the second embodiment correspond to those of the first embodiment.

[0030] Figure 6 The third embodiment of the battery according to the utility model is shown. In contrast to the first two embodiments, the battery additionally includes an upper shell 10 and a lower shell 11. The upper shell 10 is arranged between the upper structure 2 and the battery inner cavity 4. The lower shell 11 is arranged between the lower structure 3 and the battery inner cavity 4. The upper shell 10 and the lower shell 11 are configured to seal the battery inner cavity 4 and protect the battery cells 7. All other features of the third embodiment correspond to those of the second embodiment.

[0031] Figure 7A fourth embodiment of a battery according to the invention is shown. In contrast to the other embodiments, the battery additionally comprises a support element 12. The battery inner cavity 4 comprises this support element 12. The support element 12 connects the upper structure 2 and the lower structure 3. All other features of the fourth embodiment correspond to those of the second embodiment.

[0032] In the first to fourth embodiments, the exoskeleton 1 comprises a thermoformed sheet material.

[0033] In other embodiments not shown here, the exoskeleton comprises extruded profiles and / or cast elements and / or foam-filled composite materials and / or stamped sheet materials.

Claims

1. A battery with an exoskeleton, the battery being used for an electric vehicle and comprising an exoskeleton (1) having an upper structure (2) and a lower structure (3), characterized in that: - the upper structure (2) is arranged above the battery cavity (4) and comprises struts (5) along the longitudinal direction (51), the transverse direction (52) and the diagonal direction (53), - the lower structure (3) is arranged below the battery cavity (4) and comprises pillars (5) along the longitudinal direction (51), the transverse direction (52) and the diagonal direction (53), the struts (5) of the superstructure (2) and of the substructure (3) are designed to absorb longitudinal, transverse and torsional forces and to distribute the load of these longitudinal, transverse and torsional forces, The battery interior (4) has no supporting structural elements.

2. The battery with an exoskeleton according to claim 1, characterized in that: The battery additionally comprises a side frame (6), wherein the side frame (6) is configured to connect the upper structure (2) and the lower structure (3), so that the upper structure (2), the lower structure (3) and the side frame (6) form a battery cavity (4) for accommodating battery cells (7).

3. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The battery additionally comprises an inner bottom (8), wherein the inner bottom (8) is arranged below the battery cells (7).

4. The battery with an exoskeleton according to claim 2, characterized in that: The upper structure (2) is connected to the side frame (6) in one piece.

5. The battery with an exoskeleton according to claim 2, characterized in that: The lower structure (3) is connected to the side frame (6).

6. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The battery additionally comprises a frame fixing portion (9), wherein the lower structure (3) comprises the frame fixing portion (9), and the frame fixing portion (9) is designed to fix the battery in a vehicle.

7. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The battery additionally comprises an upper shell (10) and a lower shell (11), wherein the upper shell (10) is arranged between the upper structure (2) and the battery inner cavity (4), and the lower shell (11) is arranged between the lower structure (3) and the battery inner cavity (4), and the upper shell (10) and the lower shell (11) are configured to seal the battery inner cavity (4) and protect the battery cell (7).

8. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The exoskeleton (1) comprises a thermoformed sheet material.

9. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The battery additionally comprises a supporting element (12) which connects the upper structure (2) and the lower structure (3).

10. The battery with an exoskeleton according to claim 1 or 2, characterized in that: The exoskeleton (1) comprises extruded profiles and / or cast elements and / or foam-filled composite materials and / or stamped sheets.

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