Liquid cooling energy storage cabinet

Abstract

The utility model discloses a liquid cooling energy storage cabinet, which sequentially comprises a base, a control layer, a refrigeration layer and a battery layer from bottom to top, the control layer, the refrigeration layer and the battery layer are integrated in a cabinet body, a control module is arranged in the control layer, the control module is connected with the refrigeration layer and the battery layer through wires, and the control module is connected with the refrigeration layer and the battery layer through wires. A liquid cooling battery pack is arranged in the battery layer, a liquid cooling unit is arranged in the refrigerating layer, and the liquid cooling unit is connected with the liquid cooling battery pack through a liquid cooling pipeline. According to the liquid cooling energy storage cabinet, the control layer, the refrigeration layer and the battery layer are integrated in the cabinet body and are arranged on the base, the alternating current and direct current integrated structural design that the control layer, the refrigeration layer and the battery layer are stacked up and down is adopted, the structure is compact, compared with a traditional split cabinet, the weight and size are greatly reduced, the occupied area is small, the space utilization rate is high, and the machining cost is reduced; manual installation workload is reduced, the size is reduced, the field installation number is increased, the size is smaller, and transportation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage, and particularly relates to an energy storage device. Background Art

[0002] In recent years, with the increase of China's energy demand and the rapid development of new energy, energy storage technology has gradually become a hot topic of concern in various fields. As an important device among them, the energy storage cabinet plays an important role in the energy field. The energy storage cabinet is a device for storing electric energy. It adopts advanced energy storage technology, can store electric energy when the power supply is sufficient, and release electric energy during peak demand or power shortage. The energy storage cabinet is composed of components such as a battery pack, a control system, and an input-output interface. It has characteristics such as high energy density, fast response, and long life, and has become a key part of the modern energy system.

[0003] The existing liquid-cooled energy storage cabinets mostly adopt a split structure in terms of structure, which is divided into a control side and a battery compartment side. The two are independently set. The inverter, liquid-cooled unit, power distribution system, etc. are integrated in an independent space of the cabinet body, and the battery modules are integrated in another independent space. The two independent spaces are connected by cables and liquid-cooled pipes. This structure has disadvantages such as complex transportation and installation and large floor area. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies and defects in the background art, and provide a liquid-cooled energy storage cabinet with a compact structure, small floor area, and convenient transportation, installation and construction.

[0005] To solve the above technical problem, the technical solution proposed by the utility model is as follows:

[0006] A liquid-cooled energy storage cabinet, which successively includes a base, a control layer, a refrigeration layer and a battery layer from bottom to top. The control layer, the refrigeration layer and the battery layer are integrated in a cabinet body. A control module is provided in the control layer, and the control module is connected to the refrigeration layer and the battery layer through wires. A liquid-cooled battery pack is provided in the battery layer, and a liquid-cooled unit is provided in the refrigeration layer. The liquid-cooled unit is connected to the liquid-cooled battery pack through a liquid-cooled pipe.

[0007] Multiple liquid-cooled battery packs can be provided. The liquid-cooled battery packs are connected in series into a group through quick-insert cables, and the battery group is connected to the high-voltage box quick-insert connector through a power cable to realize the connection between the battery layer and the control layer. The liquid-cooled battery pack successively includes a heat-insulating coating, a base and an electric core from bottom to top. The base includes a flow channel and a fixing groove. The heat-insulating coating at the bottom of the flow channel keeps the battery temperature in a relatively ideal range, and can greatly reduce the generation of condensed water.

[0008] In the above liquid-cooled energy storage cabinet, preferably, both sides of the liquid-cooled battery pack are arranged in the battery layer through supporting beams, the supporting beams are arranged on both sides of the inner cavity of the cabinet, the supporting beam includes a back plate and a supporting plate, the back plate is fixedly connected to the inner cavity of the cabinet, and the supporting plate is used to carry the liquid-cooled battery pack.

[0009] In the above liquid-cooled energy storage cabinet, preferably, a first limiting member and a second limiting member are respectively arranged at both ends of the supporting beam. Both the first limiting member and the second limiting member are perpendicular to the back plate and the supporting plate. A pressing plate for pressing on the liquid-cooled battery pack is arranged at the upper end of the first limiting member. The second limiting member is detachably connected to the supporting beam, and a screw hole for bolt connection with the liquid-cooled battery pack is arranged on the second limiting member. When installing the liquid-cooled battery pack, the second limiting member is removed, and the liquid-cooled battery is installed on the supporting plate by using a forklift. The front end of the liquid-cooled battery pack abuts against the first limiting member, and the liquid-cooled battery pack will be pressed by the pressing plate (for example, extending into the fixing groove of the battery pack base); then the second limiting member is installed on the supporting beam (which can be connected by bolts), and the screw hole in the second limiting member is aligned with the corresponding screw hole on the liquid-cooled battery pack, and the second limiting member and the liquid-cooled battery pack are connected by bolts. Through the above installation method, the second limiting member and the liquid-cooled battery pack are connected by bolts, and the bolts limit the up-and-down vibration and left-and-right shaking of the battery pack. The first limiting member prevents the liquid-cooled battery pack from tilting upwards, so as to realize the limit fixation of the liquid-cooled battery pack in all directions and have higher stability.

[0010] In the above liquid-cooled energy storage cabinet, preferably, a horizontal plate perpendicular to the back plate is arranged at the upper edge of the back plate. On the one hand, the above horizontal plate can be used for positioning when the liquid-cooled battery pack is installed by using a forklift. The liquid-cooled battery pack can be centered by observing the distance between the liquid-cooled battery pack and the horizontal plate. At the same time, the horizontal plate can also prevent the liquid-cooled battery pack from colliding with the screws on the back plate (the supporting beam is fixedly connected to the inner side of the cabinet through the screws on the back plate), improving the safety of the installation of the liquid-cooled battery pack.

[0011] In the above liquid-cooled energy storage cabinet, preferably, a reinforcing rib is further arranged between the lower part of the supporting plate and the back plate. The above reinforcing rib can be triangular, and the triangular reinforcing rib increases the strength of the supporting beam and prevents deformation.

[0012] In the above liquid-cooled energy storage cabinet, preferably, the back plate and the supporting plate are an integral structure bent from a steel plate, and the thickness of the supporting plate is twice that of the back plate. Different from the problems of material waste, time-consuming work, and easy deformation under stress existing in the split welding method, the supporting beam of the present invention adopts an integrated design and is folded from a single plate. The folded dead edge forms a double wall thickness, which is equivalent to two plates stacked to form the supporting plate, with better stability. Good results have been obtained through actual tests, effectively reducing the production cost and improving the strength.

[0013] In the above liquid-cooled energy storage cabinet, preferably, the control module includes a high-voltage box, an inverter, and a distribution box. The high-voltage box, the inverter, and the distribution box are independently installed in the control layer, and the high-voltage box, the inverter, and the distribution box are connected by wires. The control module contains three sub-modules and various accessory electrical components. Each sub-module is independently installed in the cabinet body by bolts, and the three sub-modules are connected by cables to realize the control of the entire cabinet system, charging during the low electricity price period and discharging during the high electricity price period.

[0014] In the above liquid-cooled energy storage cabinet, preferably, the liquid-cooling pipeline includes a water inlet pipe and a drain pipe. The liquid-cooling unit is communicated with the liquid-cooling battery pack through the water inlet pipe and the drain pipe, and a liquid discharge port is provided at the bottom of the liquid-cooling unit. The refrigeration layer includes a liquid-cooling unit. The liquid-cooling unit is connected to the battery layer through the water inlet pipe and the drain pipe to complete the heat cycle exchange between the cooling liquid and the battery layer. A liquid discharge port is designed at the bottom of the liquid-cooling unit, and the deteriorated cooling liquid can be discharged through a hose connected to the liquid discharge port, making it very convenient to replace the cooling liquid. Specifically, each liquid-cooling battery pack in the battery layer is designed with a liquid injection port and a liquid discharge port, which are respectively inserted and connected to the water inlet pipe and the drain pipe.

[0015] In the above liquid-cooled energy storage cabinet, preferably, the base includes multiple channel steels. A grounding plate is provided on the channel steel, and through holes for connecting to the cabinet body and the construction foundation are respectively provided at the top and bottom of the channel steel. A kidney-shaped forklift hole for forklift transportation is provided on a pair of side edges of the channel steel, and a mesh forklift hole cover plate is provided on the kidney-shaped forklift hole. The base is welded by channel steels, and grounding plates are welded at two diagonals for grounding insulation; through holes are opened at the top and bottom of the channel steel. The top hole is used to connect to the cabinet body, and the bottom hole is used to connect to the construction foundation. Kidney-shaped forklift holes are opened at the front and back of the base for on-site forklift transportation. Each base is equipped with a mesh forklift hole cover plate, which can not only discharge the moisture at the base but also prevent small animals from entering the base to damage the cables, greatly improving the service life of the cables.

[0016] In the above liquid-cooled energy storage cabinet, preferably, the cabinet body is provided with an openable movable front door. The movable front door is hinged to the cabinet body, and various electrical components (such as a display, a signal lamp, an explosion-proof valve, a dehumidification device, and an emergency stop button, etc.) are fixed on the movable front door. The movable front door is a movable door combined with a hinge and a door lock. The maximum opening angle of the hinge can reach 120 degrees and can withstand a large axial load. The door lock is an up-and-down four-point lock, which can greatly improve the sealing performance of the cabinet body compared with ordinary top-and-bottom locks. The electrical components on the movable front door are all connected to the movable front door by bolts. The dehumidification device can greatly improve the working conditions inside the energy storage cabinet. The display, the button box, and the emergency stop button are concentrated on the door panel. Through the display, various required information can be understood in a timely manner. The button box contains power supply, operation, fault, and alarm signal lamps, with high visualization, simple operation, and improving the safety and convenience of the energy storage cabinet.

[0017] In the above liquid-cooled energy storage cabinet, preferably, it further includes a rear door, which is sealed by screws and a sealing strip. The rear door is a maintenance module, usually sealed by screws and a sealing strip, and is only disassembled when the equipment is being repaired. The hinges and locks are omitted, which can not only reduce costs but also improve the overall sealing performance of the cabinet.

[0018] In the above liquid-cooled energy storage cabinet, preferably, it further includes a fire extinguishing device and various sensors, etc., which can detect the internal working conditions of the energy storage cabinet in real time and give early warnings and extinguish fires in a timely manner. These accessories are all connected to the cabinet body by bolts, improving the safety and convenience of the energy storage cabinet.

[0019] The liquid-cooled energy storage cabinet of the present utility model adopts an integrated AC-DC structure design, and the battery cells adopt a liquid-cooled temperature control design. It can support the parallel use of multiple energy storage cabinets. The main application scenarios are small and medium-sized industrial and commercial parks, and photovoltaic energy storage charging stations. The control layer, refrigeration layer, and battery layer of this energy storage cabinet are designed in layers, which is convenient for installation, reduces the safety risks during its use, and improves safety.

[0020] In addition, the liquid-cooled energy storage cabinet of the present utility model has only one movable front door, and the rear door is a maintenance door in a normally closed state, reducing the risk of water leakage from the cabinet body and significantly improving the sealing level of the cabinet.

[0021] Finally, the base of the liquid-cooled energy storage cabinet of the present utility model is designed with forklift holes, and the forklift hole cover plate is provided with mesh holes, which can discharge the moisture in the base, reduce the corrosion of the cables, greatly improve the service life of the cables, and the top is designed with lifting rings, which can use both forklifts and cranes, can meet most handling scenarios, is convenient for installation, and has a wide application range.

[0022] Compared with the prior art, the advantages of the present utility model are as follows:

[0023] The liquid-cooled energy storage cabinet of the present utility model successively includes a base, a control layer, a refrigeration layer, and a battery layer from bottom to top, and the control layer, refrigeration layer, and battery layer are integrated in a cabinet body and installed on the base. This integrated AC-DC structure design stacked up and down is compact. Compared with traditional split cabinets, the weight and size are greatly reduced, the floor area is small, the space utilization rate is high, the processing cost is reduced, the manual installation workload is reduced, and moreover, the volume is reduced, the installation quantity on the site is increased, and the transportation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 Schematic diagram of the structure of the liquid-cooled energy storage cabinet in the embodiment (the movable front door is in the open state, and the liquid-cooled pipeline and wires are omitted).

[0026] Figure 2 Schematic diagram of the structure of the liquid-cooled energy storage cabinet in the embodiment (the movable front door is omitted).

[0027] Figure 3 For Figure 2 Partial enlarged view of A in

[0028] Figure 4 Schematic diagram of the structure of the supporting beam in the embodiment.

[0029] Figure 5 For Figure 4 Front view of

[0030] Figure 6 For Figure 4 Left view of

[0031] Figure 7 For Figure 4 Right view of

[0032] Figure 8 For Figure 4 Top view of

[0033] Legend description

[0034] 1. Base; 11. Channel steel; 12. Grounding plate; 13. Mesh forklift hole cover plate; 2. Control layer; 21. High-voltage box; 22. Inverter; 23. Distribution box; 3. Refrigeration layer; 31. Liquid-cooled unit; 4. Battery layer; 41. Liquid-cooled battery pack; 5. Wires; 6. Supporting beam; 61. Back plate; 62. Support plate; 63. First limiting member; 64. Second limiting member; 65. Pressure plate; 66. Screw hole; 67. Horizontal plate; 68. Reinforcing rib; 7. Water inlet pipe; 8. Drain pipe; 9. Movable front door. Specific implementation manners

[0035] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively and in detail below in conjunction with the accompanying drawings of the specification and preferred embodiments, but the protection scope of the present utility model is not limited to the following specific embodiments.

[0036] It should be particularly noted that when a certain element is described as "fixed to, fixedly connected to, connected to, or communicated with" another element, it can be directly fixed, fixedly connected, connected, or communicated to the other element, or indirectly fixed, fixedly connected, connected, or communicated to the other element through other intermediate connecting members.

[0037] Unless otherwise defined, all technical terms used hereinafter have the same meanings as commonly understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the protection scope of the present utility model.

[0038] Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment, etc. used in the present utility model can be obtained through the market or can be prepared by existing methods.

[0039] Embodiment:

[0040] As Figure 1 and Figure 2 shown, the liquid-cooled energy storage cabinet of this embodiment successively includes a base 1, a control layer 2, a refrigeration layer 3, and a battery layer 4 from bottom to top. The control layer 2, the refrigeration layer 3, and the battery layer 4 are integrated in a cabinet body. A control module is provided in the control layer 2, and the control module is connected to the refrigeration layer 3 and the battery layer 4 through an electric wire 5. A liquid-cooled battery pack 41 is provided in the battery layer 4, and a liquid-cooled unit 31 is provided in the refrigeration layer 3. The liquid-cooled unit 31 is connected to the liquid-cooled battery pack 41 through a liquid-cooled pipeline.

[0041] As Figures 3 - 8 shown, in this embodiment, both sides of the liquid-cooled battery pack 41 are arranged in the battery layer 4 through a support beam 6. The support beam 6 is arranged on both sides of the inner cavity of the cabinet body. The support beam 6 includes a back plate 61 and a support plate 62. The back plate 61 is fixedly connected to the inner cavity of the cabinet body, and the support plate 62 is used to carry the liquid-cooled battery pack 41.

[0042] In this embodiment, a first limiting member 63 and a second limiting member 64 are respectively provided at both ends of the support beam 6. Both the first limiting member 63 and the second limiting member 64 are perpendicular to the back plate 61 and the support plate 62. A pressing plate 65 for pressing on the liquid-cooled battery pack 41 is provided at the upper end of the first limiting member 63. The second limiting member 64 is detachably connected to the support beam 6, and a screw hole 66 for bolt connection with the liquid-cooled battery pack 41 is provided on the second limiting member 64.

[0043] In this embodiment, a horizontal plate 67 perpendicular to the back plate 61 is provided at the upper edge of the back plate 61.

[0044] In this embodiment, a reinforcing rib 68 is further provided between the lower part of the support plate 62 and the back plate 61.

[0045] In this embodiment, the back plate 61 and the support plate 62 are an integral structure formed by bending a steel plate, and the thickness of the support plate 62 is twice that of the back plate 61.

[0046] As Figure 1 and Figure 2As shown in the figure, in this embodiment, the control module includes a high-voltage box 21, an inverter 22, and a distribution box 23. The high-voltage box 21, the inverter 22, and the distribution box 23 are independently installed in the control layer 2, and the high-voltage box 21, the inverter 22, and the distribution box 23 are connected by wires 5.

[0047] As Figure 1 and Figure 2 shown in the figure, in this embodiment, the liquid cooling pipeline includes a water inlet pipe 7 and a drain pipe 8. The liquid cooling unit 31 is communicated with the liquid cooling battery pack 41 through the water inlet pipe 7 and the drain pipe 8, and a liquid discharge port is provided at the bottom of the liquid cooling unit 31.

[0048] As Figure 1 and Figure 2 shown in the figure, in this embodiment, the base 1 includes a plurality of channel steels 11. A grounding plate 12 is provided on the channel steels 11. Through holes for connecting with the cabinet body and the construction foundation are respectively provided at the top and bottom of the channel steels 11. Waist-shaped forklift holes for forklift transportation are provided on a pair of side edges of the channel steels 11, and a mesh forklift hole cover plate 13 is provided on the waist-shaped forklift holes.

[0049] As Figure 1 and Figure 2 shown in the figure, in this embodiment, an openable movable front door 9 is provided on the cabinet body, and the movable front door 9 is hinged to the cabinet body.

Claims

1. A liquid-cooled energy storage cabinet, characterized in that, It successively includes a base (1), a control layer (2), a refrigeration layer (3) and a battery layer (4) from bottom to top. The control layer (2), the refrigeration layer (3) and the battery layer (4) are integrated in a cabinet. A control module is provided in the control layer (2). The control module is connected to the refrigeration layer (3) and the battery layer (4) through an electric wire (5). A liquid-cooled battery pack (41) is provided in the battery layer (4), and a liquid-cooled unit (31) is provided in the refrigeration layer (3). The liquid-cooled unit (31) is connected to the liquid-cooled battery pack (41) through a liquid-cooled pipeline.

2. The liquid-cooled energy storage cabinet according to claim 1, wherein Both sides of the liquid-cooled battery pack (41) are arranged in the battery layer (4) through a supporting beam (6). The supporting beam (6) is arranged on both sides of the inner cavity of the cabinet. The supporting beam (6) includes a back plate (61) and a supporting plate (62). The back plate (61) is fixedly connected to the inner cavity of the cabinet, and the supporting plate (62) is used to carry the liquid-cooled battery pack (41).

3. The liquid-cooled energy storage cabinet according to claim 2, wherein A first limiting member (63) and a second limiting member (64) are respectively arranged at both ends of the supporting beam (6). Both the first limiting member (63) and the second limiting member (64) are perpendicular to the back plate (61) and the supporting plate (62). A pressing plate (65) for pressing on the liquid-cooled battery pack (41) is arranged at the upper end of the first limiting member (63). The second limiting member (64) is detachably connected to the supporting beam (6), and a screw hole (66) for bolt connection with the liquid-cooled battery pack (41) is provided on the second limiting member (64).

4. The liquid-cooled energy storage cabinet according to claim 2, wherein, A horizontal plate (67) perpendicular to the back plate (61) is arranged at the upper edge of the back plate (61).

5. The liquid-cooled energy storage cabinet according to claim 2, wherein, A reinforcing rib (68) is further arranged between the lower part of the supporting plate (62) and the back plate (61).

6. The liquid-cooled energy storage cabinet according to claim 2, wherein The back plate (61) and the supporting plate (62) are of an integral structure bent from a steel plate, and the thickness of the supporting plate (62) is twice that of the back plate (61).

7. The liquid-cooled energy storage cabinet according to any one of claims 1-6, characterized in that, The control module includes a high-voltage box (21), an inverter (22) and a distribution box (23). The high-voltage box (21), the inverter (22) and the distribution box (23) are independently installed in the control layer (2), and the high-voltage box (21), the inverter (22) and the distribution box (23) are connected through an electric wire (5).

8. The liquid-cooled energy storage cabinet according to any one of claims 1-6, characterized in that, The liquid-cooled pipeline includes a water inlet pipe (7) and a drain pipe (8). The liquid-cooled unit (31) is communicated with the liquid-cooled battery pack (41) through the water inlet pipe (7) and the drain pipe (8). A liquid discharge port is arranged at the bottom of the liquid-cooled unit (31).

9. The liquid-cooled energy storage cabinet according to any one of claims 1-6, characterized in that The base (1) includes a plurality of channel steels (11). A grounding plate (12) is arranged on the channel steels (11). Through holes for connecting with the cabinet and the construction foundation are respectively arranged at the top and bottom of the channel steels (11). Waist-shaped forklift holes for forklift transportation are arranged on a pair of side edges of the channel steels (11), and a mesh forklift hole cover plate (13) is arranged on the waist-shaped forklift holes.

10. The liquid-cooled energy storage cabinet according to any one of claims 1-6, characterized in that, An openable movable front door (9) is arranged on the cabinet, and the movable front door (9) is hinged to the cabinet.

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