External ice melting ice storage cabin and system for energy storage power station

Abstract

The utility model provides an external ice melting ice storage cabin and system for an energy storage power station. The external ice melting ice storage cabin comprises a square cabin body structure and an ice coil pipe located in a hollow space of the cabin body structure. The ice coil pipe is connected with the inner side wall of the cabin body structure through a side supporting piece, the ice coil pipe is connected with the bottom wall of the cabin body structure through a bottom supporting piece, and a water inlet, a water outlet, a circulating liquid inlet and a circulating liquid outlet are formed in the side wall of the cabin body structure; the water inlet and the water outlet are both communicated with the hollow space of the cabin structure, the circulating liquid inlet is communicated with an inlet of the ice coil pipe, and the circulating liquid outlet is communicated with an outlet of the ice coil pipe; according to the utility model, a standardized module design is adopted, the transportation and installation are simple and convenient, the operation and maintenance amount is low, no special requirement on a foundation is needed, the ice storage cabin is large in cold density and small in occupied area, and the ice storage cabin can be neat and uniform with an energy storage battery container and can be effectively integrated into the overall arrangement of a power station.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration of energy storage power stations, and in particular to an external ice-melting ice storage cabin and a system for energy storage power stations. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] An electrochemical energy storage power station is an integrated charging and discharging system in which numerous battery clusters are orderly arranged in containers as energy storage unit modules. During the charging and discharging period, a large amount of heat is generated due to electrochemical reactions. To ensure the safe and stable operation of the energy storage system, the battery cluster must be effectively cooled.

[0004] The inventors found that the current conventional practice is to use split air conditioners to cool the battery clusters through air cooling or liquid cooling. According to operating data, the energy consumption of conventional refrigeration systems accounts for about 15% of the total power storage, resulting in low overall efficiency of the power station, reduced effective discharge, and directly reduced profits. Some power stations are trying to use water cold storage tanks, but there are defects such as low energy density, large footprint and high requirements on foundation bearing capacity, and the overall cost of the system is relatively high. Utility Model Content

[0005] In order to address the deficiencies in the prior art, the utility model provides an external ice-melting ice storage cabin and system for an energy storage power station, which adopts a standardized module design, is easy to transport and install, has low operation and maintenance requirements, has no special requirements for the foundation, has a large cold density of the ice storage cabin, occupies a small area, can be uniform with the energy storage battery container, and can be effectively integrated into the overall layout of the power station.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides an external ice-melting ice storage chamber for an energy storage power station.

[0008] An external ice melting ice storage chamber for an energy storage power station comprises: a square chamber structure and an ice coil located in a hollow space of the chamber structure;

[0009] The ice tray is connected to the inner wall of the cabin structure through the side support, and the ice tray is connected to the bottom wall of the cabin structure through the bottom support. The side wall of the cabin structure is provided with a water inlet, a water outlet, a circulating liquid inlet and a circulating liquid outlet;

[0010] The water inlet and the water outlet are both communicated with the hollow space of the cabin structure, the circulating liquid inlet is communicated with the inlet of the ice coil, and the circulating liquid outlet is communicated with the outlet of the ice coil.

[0011] As a further limitation of the first aspect of the present invention, the square cabin structure is in the shape of a rectangular parallelepiped, and the outer dimensions of the cabin structure are the same as the outer dimensions of the energy storage battery container.

[0012] As a further limitation of the first aspect of the utility model, the water inlet is communicated with a first water distributor in the hollow space.

[0013] As a further limitation of the first aspect of the utility model, the water outlet is communicated with the second water distributor in the hollow space.

[0014] As a further limitation of the first aspect of the utility model, the top of the cabin structure is an integrated cabin cover that is installed in a closed manner and can be removed as a whole, the side of the cabin cover close to the hollow space is connected to the insulation layer, and the four sides of the cabin cover are connected to sealing strips.

[0015] As a further limitation of the first aspect of the utility model, at least one enclosed inspection opening for allowing a line of sight to pass through is provided on the hatch cover.

[0016] As a further limitation of the first aspect of the utility model, the bottom wall and the side wall of the cabin structure are both multi-layer structures, and the multi-layer structure is, from the outside to the inside, an ice storage cabin outer shell layer, an ice storage cabin vapor barrier layer, an ice storage cabin insulation layer, an ice storage cabin waterproof layer and an ice storage cabin lining steel plate layer.

[0017] As a further limitation of the first aspect of the utility model, both sides of the steel plate layer of the lining of the ice storage tank are sprayed with epoxy resin.

[0018] As a further limitation of the first aspect of the present invention, the distance between the ice tray and the inner lining steel plate layer is greater than or equal to 200 mm.

[0019] In a second aspect, the utility model provides an external ice melting and ice storage system for an energy storage power station.

[0020] An external ice-melting ice storage system for an energy storage power station comprises at least two external ice-melting ice storage tanks as described in the first aspect of the utility model, wherein two adjacent external ice-melting ice storage tanks are connected in series via a water inlet and a water outlet, or the water inlets and water outlets of the two ice storage tanks are connected in parallel.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The utility model innovatively proposes an external ice-melting ice storage cabin for energy storage power stations, which adopts a standardized module design, is easy to transport and install, has low operation and maintenance requirements, has no special requirements for the foundation, has a large cold density, occupies a small area, and can be uniform with the energy storage battery container, and can be effectively integrated into the overall layout of the power station.

[0023] 2. The utility model innovatively proposes an external ice-melting ice storage tank for energy storage power stations, which can output low-temperature cold water. It can not only effectively improve the overall energy efficiency of the energy storage power station system and improve the operating efficiency of the power station, but also effectively reduce the pipeline specifications and heat exchanger area of ​​the plant area, and reduce the investment in the energy storage power station system.

[0024] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] Figure 1 A front view of an external ice melting ice storage tank for an energy storage power station provided in Example 1 of the utility model;

[0027] Figure 2 A side view of an external ice melting ice storage tank for an energy storage power station provided in Example 1 of the utility model;

[0028] Figure 3 A top view of an external ice-melting ice storage tank for an energy storage power station provided in Example 1 of the utility model;

[0029] Figure 4 A schematic diagram of the structure layer of the ice storage tank provided in Example 1 of the utility model;

[0030] Among them, A, length of ice storage tank; B, width of ice storage tank; H, height of ice storage tank; a, water inlet; b, water outlet; c, inlet of ethylene glycol solution; d, outlet of ethylene glycol solution; e, inspection port; 1, cabin structure; 2, water inlet distributor; 3, ice coil; 4, bottom support; 5, side support; 6, water outlet distributor; 7, shell layer of ice storage tank; 8, vapor barrier layer of ice storage tank; 9, thermal insulation layer of ice storage tank; 10, waterproof layer of ice storage tank; 11, steel plate layer lining the ice storage tank. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0033] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0034] Embodiment 1:

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, Embodiment 1 of the utility model provides an external ice melting ice storage chamber for an energy storage power station, comprising: a square chamber structure 1 and an ice coil 3 located in a hollow space of the chamber structure 1;

[0036] The ice tray 3 is connected to the inner wall of the cabin structure 1 through the side support 5, and the ice tray 3 is connected to the bottom wall of the cabin structure 1 through the bottom support 4. The side wall of the cabin structure 1 is provided with a water inlet a, a water outlet b, an ethylene glycol solution inlet c (i.e., a circulating liquid inlet), and an ethylene glycol solution outlet d (i.e., a circulating liquid outlet);

[0037] The water inlet a and the water outlet b are both communicated with the hollow space of the cabin structure 1 , the ethylene glycol solution inlet c is communicated with the inlet of the ice coil 3 , and the ethylene glycol solution outlet d is communicated with the outlet of the ice coil 3 .

[0038] The bottom support member 4 and the side support member 5 can meet the support force and ice storage requirements of the ice coil, while improving the reliability of the ice coil during transportation, installation and operation.

[0039] In this embodiment, specifically, the square cabin structure 1 is in the shape of a cuboid, and the outer dimensions of the cabin structure 1 are the same as the outer dimensions of the energy storage battery container. More specifically, the outer shape of the cabin structure 1 is consistent with the energy storage battery container, and a 40-foot standard size module is used.

[0040] In this embodiment, specifically, the water inlet a is connected to the water inlet distributor 2 (ie, the first water distributor) in the hollow space, and the water outlet b is connected to the water outlet distributor 6 (ie, the second water distributor) in the hollow space.

[0041] The water inlet distributor 2 and the water outlet distributor 6 are arranged on both sides of the narrow side of the cabin structure. The opening sizes of the water inlet distributor 2 and the water outlet distributor 6 are designed using fluid simulation. The opening sizes are different according to the distance from the inlet and outlet. The closer the distance, the smaller the opening, thereby ensuring uniform water distribution and balanced cooling release.

[0042] In this embodiment, specifically, the top of the cabin structure 1 is an integrated cabin cover that is installed in a closed manner and can be removed as a whole. The side of the cabin cover close to the hollow space is connected to the insulation layer, and the four sides of the cabin cover are connected with sealing strips to minimize the cold loss of the ice storage cabin.

[0043] In this embodiment, specifically, at least one enclosed inspection port e for allowing sight to pass through is opened on the hatch cover, so that operation and maintenance personnel can observe the internal ice storage and ice release conditions.

[0044] In this embodiment, specifically, Figure 4 As shown, the bottom wall and the side wall of the cabin structure 1 are both multi-layer structures, and the multi-layer structure is composed of an ice storage tank outer shell layer 7, an ice storage tank vapor barrier layer 8, an ice storage tank insulation layer 9, an ice storage tank waterproof layer 10 and an ice storage tank lining steel plate layer 11 from the outside to the inside.

[0045] The ice storage tank insulation layer 9 can reduce the cold loss of the cold ice storage tank. The ice storage tank lining steel plate layer 11 is an integrated lining steel plate arranged around the inner side of the cabin structure and inside the insulation material at the bottom; both sides of the ice storage tank lining steel plate layer 11 are sprayed with epoxy resin to ensure that there is no water leakage around and improve the anti-corrosion performance.

[0046] The ice storage compartment vapor barrier layer 8 and the ice storage compartment waterproof layer 10 can ensure that no water vapor penetrates into the thermal insulation material, thereby ensuring a long-lasting thermal insulation effect.

[0047] In this embodiment, specifically, the ice tray pipe 3 is compactly arranged and integrally encapsulated in the hollow space of the cabin structure 1, and a space of at least 200 mm is maintained between the ice tray pipe 3 and the steel plate layer 11 of the ice storage cabin lining.

[0048] In this embodiment, the water inlet and the water outlet are both large-diameter and fast-interface lock-type connection, which meets the needs of fast networking and joint operation of multiple ice storage compartments in series and parallel.

[0049] The working method of the ice storage tank of this embodiment includes: using the unit to store ice and keep cold in the ice storage tank during off-peak electricity, and providing low-temperature water through the ice storage tank to be transported to the plate heat exchanger of the battery compartment during the discharge period of the power station to exchange heat with the liquid cooling system in the battery compartment to cool the liquid cooling system, thereby ensuring that the battery cluster operates efficiently and stably at the designed temperature;

[0050] Through standardized design, multiple ice storage tanks can be connected in series or in parallel to meet the joint operation requirements of the project site and system requirements. The ice storage system can be combined through quick interfaces to meet the project requirements. In addition, compared with conventional refrigeration solutions, the low-temperature water provided by the ice storage tank can greatly reduce the water flow rate, reduce the diameter of the delivery pipe, and reduce the area of ​​the plate heat exchanger, further reducing the overall cooling system cost.

[0051] The simple, efficient and standardized external ice-melting ice storage chamber suitable for energy storage power stations proposed in the utility model can fully meet the use requirements in energy storage power station scenarios, can effectively improve the overall efficiency of energy storage power stations, improve the reliability and economy of operation, effectively reduce the cost of existing air-conditioning systems, and achieve the effect of uniform equipment in energy storage power stations.

[0052] Embodiment 2:

[0053] Embodiment 2 of the present invention provides an external ice-melting and ice-storage system for an energy storage power station, comprising at least two external ice-melting and ice-storage tanks as described in Embodiment 1 of the present invention, wherein two adjacent external ice-melting and ice-storage tanks are connected in series via a water inlet and a water outlet, or the water inlets and water outlets of the two ice-storage tanks are respectively connected in parallel.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An external ice melting ice storage tank for an energy storage power station, characterized in that: include: A square cabin structure and an ice tray located in a hollow space of the cabin structure; The ice tray is connected to the inner wall of the cabin structure through the side support, and the ice tray is connected to the bottom wall of the cabin structure through the bottom support. The side wall of the cabin structure is provided with a water inlet, a water outlet, a circulating liquid inlet and a circulating liquid outlet; The water inlet and the water outlet are both communicated with the hollow space of the cabin structure, the circulating liquid inlet is communicated with the inlet of the ice coil, and the circulating liquid outlet is communicated with the outlet of the ice coil.

2. The external ice melting ice storage tank for energy storage power station according to claim 1, characterized in that: The square cabin structure is in the shape of a cuboid, and the outer dimensions of the cabin structure are the same as the outer dimensions of the energy storage battery container.

3. The external ice melting ice storage tank for energy storage power station according to claim 1, characterized in that: The water inlet is communicated with the first water distributor in the hollow space.

4. The external ice melting ice storage tank for an energy storage power station according to claim 1, characterized in that: The water outlet is communicated with the second water distributor in the hollow space.

5. The external ice melting ice storage tank for energy storage power station according to claim 1, characterized in that: The top of the cabin structure is an integrated hatch cover that is installed in a closed manner and can be removed as a whole. The side of the hatch cover close to the hollow space is connected to the insulation layer, and the four sides of the hatch cover are connected with sealing strips.

6. The external ice melting ice storage tank for energy storage power station according to claim 5, characterized in that: At least one closed inspection opening for allowing sight to pass through is provided on the hatch cover.

7. The external ice melting ice storage tank for energy storage power station according to claim 1, characterized in that: The bottom wall and side wall of the cabin structure are both multi-layer structures, which are, from the outside to the inside, an outer shell layer of the ice storage cabin, a vapor barrier layer of the ice storage cabin, an insulation layer of the ice storage cabin, a waterproof layer of the ice storage cabin and a steel plate layer of the ice storage cabin lining.

8. The external ice melting ice storage tank for an energy storage power station according to claim 7, characterized in that: Both sides of the steel plate layer lining the ice storage tank are sprayed with epoxy resin.

9. The external ice melting ice storage tank for an energy storage power station according to claim 7 or 8, characterized in that: The distance between the ice coil and the inner lining steel plate layer is greater than or equal to 200 mm.

10. An external ice melting and ice storage system for an energy storage power station, characterized in that: The invention comprises at least two external ice-melting ice storage tanks according to any one of claims 1 to 9, wherein two adjacent external ice-melting ice storage tanks are connected in series via a water inlet and a water outlet, or the water inlets and water outlets of the two ice storage tanks are connected in parallel.

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