Underfloor battery storage

Abstract

The invention relates to an underground battery storage system, wherein the underground battery storage system comprises an enclosure (2) arranged in the ground (E), battery storage modules (5) and electronic components (6) for controlling the battery storage modules (5), wherein the battery storage modules (5) and electronic components (6) are arranged in a cabin (1) embedded in the enclosure (2), wherein the cabin (1) with the battery storage modules (5) and electronic components (6) arranged therein can be extended vertically from the enclosure (2) arranged in the ground (E) by means of a lifting system.

Description

[0001] The invention relates to an underground battery storage system according to the preamble of the first claim.

[0002] Energy storage systems in the form of containerized battery storage units are difficult to integrate into existing infrastructure. Conversely, underground systems require significant space to ensure accessibility. The components must be installed and connected on-site. Pre-assembly of individual components is only possible to a very limited extent.

[0003] From publication WO 2020 / 193378 A1, a battery storage system, particularly for buffering an electrical supply network, is known, wherein the battery storage system has a housing in the form of an ISO container with battery cell modules arranged inside on a support system. The support system is electrically insulated from the housing. However, such a container-based design is difficult to integrate into existing infrastructure.

[0004] From publication DE 10 2013 012 250 A1, a high-performance or high-energy storage system with an operating room for electrical equipment is known, in which the operating room with the batteries located therein is at least partially below ground level. The energy storage units can be removed separately via a lifting device and used externally.

[0005] Publication EP 3 288 141 A1 discloses an automated battery storage system for stabilizing power grids. The storage system is designed in the form of a container and contains all the components required for operation within the container. A disadvantage is the increased space requirement when setting up the containers.

[0006] Further solutions are known from the documents AT 217 664 B and EP 0 306 058 81, which concern lift equipment for vehicles in a parking garage, but do not define underground storage for connection to an infrastructure.

[0007] The publication EP 0 306 058 B1 relates to a charging infrastructure for electrically powered vehicles with a charging network of interconnected charging stations, wherein the charging network includes at least one battery storage unit as a buffer storage unit, which may be located underground. The objective of this solution is to specify a charging infrastructure for charging at least one electrically powered or motorized vehicle. In particular, a cost-effective charging infrastructure is to be implemented that enables fast charging of several vehicles connected in parallel. For this purpose, the battery storage unit can be installed underground, i.e., in a subsurface casing.This is intended to ensure that the available construction space for sidewalks or similar areas is not adversely affected, and that the battery storage system is thus arranged in a visually invisible manner and protected from external influences such as vandalism. The specific design and placement of the battery storage system in the ground, as well as how any repair or maintenance work on it is carried out, are not disclosed.

[0008] From the documents EP 2 463 162 A2 and DE 10 2009 035 253 A1, battery exchange stations for vehicle batteries with underground storage and exchange containers are known, wherein complete containers are installed in the ground and the batteries are stored in them and exchanged into a vehicle via horizontal and vertical transport means.

[0009] The object of the invention is to develop an underground battery storage system that requires little space, can be integrated into the existing infrastructure, and is accessible for repairs and maintenance.

[0010] This problem is solved using the features of the first patent claim.

[0011] Advantageous embodiments result from the dependent claims.

[0012] The underground battery storage system comprises an enclosure located in the ground, battery storage modules, and electronic components for controlling the battery storage modules. It can be integrated into an existing infrastructure. The battery storage modules and electronic components are arranged in a cabin recessed within the enclosure. This cabin, containing the battery storage modules and electronic components, is connected to the power grid via an energy supply chain. In the retracted position of the underground battery storage system, the cabin is completely submerged and fitted flush with the ground level with a cover. The cabin, containing the battery storage modules and electronic components, can be vertically extended from the underground enclosure by means of a lifting system to allow for above-ground maintenance. The cabin features aIt features an open design that allows access for maintenance around the cabin and is constructed using a frame design, and in an extended state is accessible from both inside and outside the cabin for repairs and maintenance work.

[0013] The lifting system makes it possible to enable above-ground maintenance by raising the cabin out of the ground.

[0014] In an advantageous embodiment, the enclosure is designed as a concrete trough with a base and circumferential side walls. Advantageously, the enclosure features perimeter drainage to the surrounding soil and a gravel layer in the base area to protect against precipitation and groundwater.

[0015] For stability, the cabin is guided within the enclosure by means of vertical guides. These guides are preferably in the form of rollers that rest against the side walls of the enclosure. During vertical movement of the cabin, it rolls along the side walls on the rollers, and even at maximum extension, the rollers remain in contact with the side walls of the enclosure.

[0016] Preferably, the lifting system is designed as a vertical, electrically driven threaded spindle. In this configuration, the cabin has a motor by which it can be moved along the threaded spindle. When the threaded spindle is in its lowered position, it extends into the cabin.

[0017] In an alternative configuration, the lifting system is an electrically or hydraulically driven scissor lift system. In such a configuration, the motor for driving the cabin can be located either on the cabin itself or in the floor area of ​​the enclosure.

[0018] The cabin is preferably designed in such a way that, in a retracted position of the energy storage unit, it is completely submerged and fitted with a cover flush with the ground level.

[0019] To ensure operational safety, a fire extinguishing water connection is preferably provided on the top of the cover.

[0020] Furthermore, upward-facing eyelets may be mounted on the cover.

[0021] Particularly preferred is the interchangeable arrangement of the cabin within the enclosure, whereby a new cabin is pre-assembled and ready for installation and can be inserted into the prepared enclosure using a crane.

[0022] The cabin features an energy supply chain for connecting the cabin, with its battery storage modules and electronic components, to the power grid.

[0023] For easy maintenance, the cabin is designed with a stand-like structure, allowing access for repairs and maintenance from both inside and outside the cabin when extended. Depending on the cabin's configuration and the battery storage modules and electronic components installed within it, maintenance may also be performed solely from the outside.

[0024] The invention is explained in more detail below using an exemplary embodiment and accompanying drawings.

[0025] They show: Fig. 1 an energy storage system embedded in the ground, Fig. 2 an energy storage system according to Fig. 1 in a side view, Fig. 3 an extended position of the cabin for maintenance purposes from the outside, Fig. 4 a side view according to Fig. 3, Fig. 5 an alternative design of the cabin lifting system, Fig. 6 an extended position of the cabin according to Fig. 5, Fig. 7 a cabin for installation in an underground enclosure.

[0026] In the Fig. Figure 1 shows an underground, sub-ground battery storage system in the form of a buffer storage system, installed in the ground E, in a cross-sectional view. Fig. Figure 2 shows a corresponding lateral sectional view of the energy storage system. The energy storage system comprises a cabin 1, which is arranged within an enclosure 2. The enclosure 2 is preferably designed in the form of a concrete trough and has a drainage system 3 around its perimeter and a gravel layer 4 at the bottom as a boundary and for protection against the surrounding soil E. Furthermore, the internal dimensions are matched to the external dimensions of the cabin.

[0027] Cabin 1 contains battery storage modules 5 and electronic components 6 for controlling the battery storage modules 5. Cabin 1 is pre-assembled and ready for installation and can be placed into the prepared enclosure 2 using a crane. Cabin 1 is in Fig. 1 and Fig. Figure 2 shows the cabin 1 in a working position, meaning it is sunk into the ground E. A cover 7 is located on the top of the cabin 1, which is flush with the surrounding area in the working position. Furthermore, lifting lugs 8 and a fire hydrant connection 9 are provided in the cover 7. In the working position, the cabin 1 is not accessible to an operator B for maintenance.

[0028] Cabin 1 features a vertical lifting system in the form of an electrically driven threaded spindle 10, by means of which the cabin 1 can be extended vertically from the ground E. The threaded spindle is centrally located in the middle of the cabin and, in the working position, points through the cabin 1 towards the cover 7. To stabilize the cabin 1, rollers 11 are provided circumferentially on the side profiles of the cabin 1, pointing towards the side walls of the enclosure 2. These rollers roll along the side walls of the enclosure 2, thus guiding the cabin 2 within the enclosure 2. The connection of the battery storage modules and electronic components to the power grid is made via an energy chain 12, which can compensate for vertical movement of the cabin.

[0029] The cabin can be raised into a maintenance position using the threaded spindle 10. The raised maintenance position is in the Fig. 3 and Fig. Figure 4 shows that the cabin 1 is raised vertically from the ground E by means of the threaded spindle 10, with the rollers 11 remaining in contact with the housing 2 in the maintenance position. In this position, the cabin 1 and the battery storage modules 5 and electronic components 6 located within it are accessible from all sides. Furthermore, depending on the dimensions of the cabin 1, according to Fig. 4. Another operator, B2, works inside cabin 1. The energy chain 12 has a length that corresponds to the lifting movement of cabin 1.

[0030] An alternative lifting system is available in the Fig. 5 and Fig. 6 shown. Compared to the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 takes place in the energy storage system according to Fig. 5 and Fig. 6. A lifting system in the form of a scissor lift system 13. Application. The scissor lift system 13 is arranged under the cabin 1 above the floor of the enclosure 2 and lifts the cabin 1 vertically out of the floor. In this configuration as well, the cabin 1 can be delivered pre-assembled and installed in the enclosure 2 using a crane. The construction of the cabin 1 corresponds to the construction of the cabin 1 according to the Fig. 1, Fig. 2, Fig. 3 to Fig. 4.

[0031] The Fig. Figure 7 shows a representation of the cabin 1, which can preferably be inserted into the enclosure located in the ground using a crane. The cabin 1 is designed as a frame with longitudinal beams 1.1 and transverse beams 1.2. Furthermore, the cabin 1 has a base plate 14 and a motor with a screw jack 15 mounted in the area of ​​the base plate 14. The cabin 1 can be moved vertically out of the ground E by means of a lifting system in the form of a screw jack 10 or a scissor lift 13. The enclosure serves as a vertical guide for the rollers 11 arranged around the circumference on the longitudinal beams 1.1, which roll along the side walls.

[0032] Inside cabin 1 are arranged the battery storage modules 5 and electronic components 6, which are connected to the power grid by means of the energy supply chain 12.

[0033] A cover 7 is located on the top of cabin 1, which includes a fire extinguishing water connection 9 for emergencies and lifting lugs 8 for mounting the cabin 1. The open design of cabin 1 allows access for maintenance all around the cabin 1.

[0034] In an alternative configuration, cabin 1 can have its own enclosure with access in the form of an opening or door for an operator, thereby providing additional protection.

[0035] Cabin 1 according to Fig. 7 can be delivered pre-assembled to the assembly site and lowered vertically into the ground using a crane with the lifting system.

[0036] With the underground battery storage system according to the invention, the space required for such a storage system can be limited to the necessary components. Maintenance can be carried out above ground according to the invention, thus ensuring access from all sides.

[0037] The cabin can be prefabricated, allowing for quick installation on site. The enclosure is preferably made from precast concrete elements. Thanks to the modular design of the energy storage system, a complete cabin replacement is possible quickly. Reference symbol list 1 cabin 1.1 Longitudinal beams 1.2 Crossbeams 2 Enclosure 3 Drainage 4 gravel layer 5 Battery storage module 6 electronic components 7 Cover 8 Lifting eyelet 9 Fire extinguishing water connection 10 threaded spindles 11 rolls 12 Energy supply chain 13 Scissor lift system 14 Base plate 15 Motor with spindle lifting gear E Soil B Operator B2 Second Operator

Claims

Underground battery storage system, wherein the underground battery storage system comprises an enclosure (2) arranged in the ground (E), battery storage modules (5), and electronic components (6) for controlling the battery storage modules (5), and is integrable into an existing infrastructure, characterized in that the battery storage modules (5) and electronic components (6) are arranged in a cabin (1) recessed in the enclosure (2), which, together with the battery storage modules (5) and electronic components (6) arranged therein, has a connection to the power grid via an energy supply chain (12), wherein the cabin (1) is fully submerged in a retracted position of the underground battery storage system and is flush with the ground level (E) by means of a cover (7), and wherein the cabin (1) with the battery storage modules (5) and electronic components (6) arranged therein is vertically raised from the enclosure (2) by means of a lifting system.The enclosure (2) located in the ground (E) is extendable to provide above-ground maintenance access, the cabin (1) having an open design allowing access for maintenance all around the cabin (1), and being constructed in a frame structure and being accessible for repairs and maintenance work from inside and outside the cabin (1) when extended. Underground battery storage system according to claim 1, characterized in that the housing (2) is designed in the form of a concrete tub with a floor and circumferential side walls. Underfloor battery storage system according to claim 1 or 2, characterized in that the cabin (1) is guided in the housing (2) by means of vertical guides. Underfloor battery storage system according to claim 3, characterized in that the guides are designed in the form of rollers (11) that abut the side walls of the housing (2). Underfloor battery storage system according to one of claims 1 to 4, characterized in that the lifting system is designed as a vertical electrically driven threaded spindle (10) and that the cabin (1) has a motor (15) by means of which it can be moved along the threaded spindle (10). Underfloor battery storage system according to one of claims 1 to 4, characterized in that the lifting system is an electrically or hydraulically driven scissor lift system (13). Underground battery storage system according to claim 1, characterized in that a fire extinguishing water connection (9) is provided in the cover (7). Underfloor battery storage according to claim 1 or 7, characterized in that upwardly pointing stop lugs (8) are mounted on the cover (7). Underfloor battery storage system according to one of the preceding claims, characterized in that the cabin (1) is interchangeable. Underfloor battery storage system according to one of the preceding claims, characterized in that the cabin (1) is designed in a frame construction and can be serviced in an extended state from inside the cabin (1) and from outside the cabin (1) for repairs and maintenance work.

Images