Absorber Structure, Energy Storage Arrangement, High-Voltage Store, and Process for Manufacturing an Absorber Structure

Abstract

An absorber structure for high-voltage stores includes a main part made of a first material, the main part having a placement area for placing a multiplicity of energy storage cells thereon. The first material is provided with an additive or, at least in some areas, with a coating. The additive or coating increases the heat resistance of the main part.

Claims

1.-14. (canceled)

15. An absorber structure for high-voltage stores, comprising: a main body composed of a plastic; wherein the main body comprises an arrangement surface for arrangement of a multiplicity of energy storage cells, and wherein the plastic has an additive and/or the main body has a fireproof coating at least in certain regions, said additive and/or coating increasing heat resistance of the main body.

16. The absorber structure according to claim 15, wherein the plastic is a foam, and the foam is EPP or polyisocyanurate.

17. The absorber structure according to claim 15, wherein at least the arrangement surface has the coating.

18. The absorber structure according to claim 15, wherein the coating is a sprayed-on coating.

19. The absorber structure according to claim 15, wherein the coating comprises polyurea.

20. The absorber structure according to claim 15, wherein the additive comprises at least one of the following materials: ammonium polyphosphate, PPM triazine, melamine cyanurate, or melamine polyphosphate.

21. The absorber structure according to claim 15, wherein the main body comprises ventilation openings which extend away from the arrangement surface.

22. The absorber structure according to claim 15, wherein the arrangement surface is in a form of a closed surface.

23. An energy storage arrangement, comprising: a multiplicity of energy storage cells; an absorber structure, for high-voltage stores, having a main body composed of a plastic, wherein the main body comprises an arrangement surface for arrangement of the multiplicity of energy storage cells, wherein the plastic has an additive and/or the main body has a fireproof coating at least in certain regions, said additive and/or coating increasing heat resistance of the main body, and wherein the multiplicity of energy storage cells are arranged on the arrangement surface.

24. The energy storage arrangement according to claim 23, wherein the energy storage cells are round cells which are arranged on the arrangement surface so as to be upright and to extend along a vertical direction, the main body comprises ventilation openings which extend away from the arrangement surface, and the ventilation openings are each formed in an extension of the energy storage cells.

25. The energy storage arrangement according to claim 23, wherein intermediate spaces are formed between the energy storage cells, and the main body covers the intermediate spaces.

26. The energy storage arrangement according to claim 23, wherein the main body is formed such that ventilation is provided in a transverse direction.

27. An energy store housing, comprising: a housing; and an energy store arrangement according to claim 23, wherein the absorber structure of the energy store arrangement is fastened to the housing.

28. A method for producing an absorber structure for high-voltage stores, the method comprising: increasing a heat resistance of an absorber structure for high-voltage stores, the absorber structure comprising a main body composed of a plastic, wherein the heat resistance is increased by coating at least certain regions of the main body and/or introducing an additive into a material of the main body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG. 1 is a schematic sectional view of an energy storage arrangement;

[0038] FIG. 2 shows the arrangement known substantially from FIG. 1, wherein an arrangement surface of the main body has a coating;

[0039] FIG. 3 shows one embodiment of an absorber structure as seen from below, together with a detail view; and

[0040] FIG. 4 is a schematic partial view of one embodiment of an energy store housing.

DETAILED DESCRIPTION OF THE DRAWINGS

[0041] FIG. 1 schematically shows one embodiment of an energy storage arrangement in section, comprising an absorber structure which has a main body 10, wherein a multiplicity of energy storage cells 1, which in the present case are in particular in the form of round cells, are arranged on an upper side O of the main body 10. Intermediate spaces 2 are formed between the energy storage cells 1. The energy storage cells (or the round cells) 1 each extend along a vertical axis H, which in turn extends perpendicularly with respect to a plane E along which the main body 10 is oriented.

[0042] According to a preferred embodiment, the main body 10, as depicted in the present case, is in the form of a foam body. Reference designation 14 denotes a plurality of ventilation openings which are in the form of openings or apertures within the main body 10. In the present case, the ventilation openings 14 are formed in particular in the extension of the energy storage cells 1. Analogously, no ventilation openings 14 are formed in the extension of the intermediate spaces 2 between the energy storage cells 1. In other words, the material of the main body 10 lies here. In the present case, the absorber structure is of honeycomb-shaped form. As illustrated here, an absorber structure is arranged on or fastened to a lower housing part of an energy store housing for example by way of its lower side U, preferably in a materially bonded manner.

[0043] In the case of a thermal event in the second energy storage cell 1 from the left, a sudden temperature and pressure increase occurs below the cell 1, as schematically depicted by the jagged arrow. The degassing valve of the energy storage cells 1 is formed on their lower side, that is to say is oriented toward the absorber structure. In the case of such an explosion, substances/particles from the respective cell are flung downward in the direction of the housing lower part (not depicted here), where they for example ricochet and are flung back in the direction of the other energy storage cells 1. This is also depicted by way of corresponding arrows. If such particles pass into the intermediate spaces 2, a short circuit between the cells 1 may occur with correspondingly devastating consequences. Accordingly, it is important that the main body 10 as such remains unchanged even in the case of a thermal event.

[0044] FIG. 2 shows the arrangement known substantially from FIG. 1, wherein in the present case a coating 20, for example in the form of a spray application, is provided or arranged on an arrangement surface 12. The coating for example comprises polyurea or is formed from polyurea. It has been shown that polyurea applied by spraying can increase the temperature stability of the main body 10 up to 1000 C. and more. Charring of the main body 10 may occur, but not burning. As an alternative or in addition, the material of the main body 10 has one or more additives in order to increase the heat resistance and temperature resistance of same.

[0045] FIG. 3 shows one embodiment of a honeycomb-shaped main body 10 as seen from below. It is possible to see a multiplicity of ventilation openings 14 which extend through the main body 10, preferably in the direction of the energy storage cells. The ventilation openings 14 are preferably connected via a multiplicity of connecting channels 16. For reasons of clarity, not all of the ventilation openings and ventilation channels are provided with a reference designation. For better orientation, a section B-B is depicted in the present case. The section B-B is illustrated, as it were, in FIGS. 1 and 2. A section A-A is also depicted, which is emphasized in the right half of the image. It is possible to see how the ventilation openings 14 are connected via the connecting channels 16 on the lower side of the absorber structure or of the main body 10. It is also illustrated that, at least in the embodiment of the absorber structure or of the main body 10 depicted here, the arrangement surface or that region of the main body 10 which forms the arrangement surface 12 is in the form of a closed surface/plane. In the case of a thermal event, the arrangement surface 12 is pierced in the respective region as a result of the high pressure increase.

[0046] FIG. 4 shows a schematic view of a portion of one embodiment of an energy store housing, wherein a housing of the energy store housing, in particular a housing lower part, is depicted with the reference designation 40. The main body 10 of the absorber structure is expediently fastened thereto in a materially bonded manner, preferably by means of adhesive. The absorber structure or the main body 10 has a coating 20, preferably comprising polyurea, on its upper side. According to one embodiment, a coating 20 is also provided on the lower side, that is to say in the direction of the housing or housing lower part 40. According to one embodiment, the material of the main body is EPP. As an alternative, it is polyisocyanurate. When using polyisocyanurate, it is expediently possible to omit a coating 20 on the lower side, inter alia since the surface energy of polyisocyanurate is higher and thus entails better adhesive properties.

LIST OF REFERENCE DESIGNATIONS

[0047] 1 Energy storage cell, round cell [0048] 2 Intermediate space, gap [0049] 10 Main body [0050] 12 Arrangement surface [0051] 14 Ventilation opening [0052] 16 Connecting channel [0053] 20 Coating [0054] 40 Housing [0055] O Upper side [0056] U Lower side [0057] H Vertical direction [0058] E Plane