Liquid cooling energy storage cabinet

Abstract

The invention discloses a liquid cooling energy storage cabinet which comprises a main frame, the interior of the main frame is divided into an energy bin and an electric appliance bin which are mutually independent through a vertically-arranged partition plate, a battery rack is arranged in the energy bin, battery packs are detachably installed in the battery rack, a liquid cooling plate is tightly attached to the side face of each battery pack, and a flow channel is formed in each liquid cooling plate. The flow channels of the adjacent liquid cooling plates are connected in series through liquid cooling pipelines; an inlet and an outlet of the liquid cooling pipeline both extend to the electric appliance bin and are connected with an outlet and an inlet of the liquid cooling unit respectively, and the liquid cooling unit is fixed to a bottom plate of the electric appliance bin through a liquid cooling air conditioner support. Through the design that the liquid cooling plate is directly attached to the side face of the battery pack, the heat conduction path is extremely short, the advantages of high specific heat capacity and high heat conductivity of liquid are utilized, heat generated during charging and discharging of the battery can be rapidly and efficiently taken away, and the problem of low heat dissipation efficiency caused by low specific heat capacity and poor heat conductivity of air in air cooling is solved.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage cabinets, specifically a liquid-cooled energy storage cabinet. Background Technology

[0002] As a key device for achieving peak shaving and valley filling and dynamic capacity expansion, commercial and industrial energy storage systems are increasingly widely used. The energy storage cabinet is the core carrier of such systems, and its performance and reliability are directly related to the operating efficiency and safety of the entire energy storage power station.

[0003] Currently, most small and medium-sized industrial and commercial energy storage cabinets on the market adopt air-cooling heat dissipation solutions. This solution relies on forced convection of air inside and outside the cabinet, using a fan to drive cool air over the surface of the battery pack, thereby removing heat. This traditional air-cooling heat dissipation method exposes structural defects: Air has a low specific heat capacity and poor thermal conductivity, resulting in low heat exchange efficiency of air-cooled systems. The heat generated by the battery during charging and discharging cannot be carried away quickly and evenly, easily leading to heat accumulation inside and between battery packs, creating local hot spots. This causes excessive temperature differences throughout the battery cluster, and this uneven temperature field accelerates battery degradation, seriously affecting battery consistency and lifespan. To ensure unobstructed airflow, sufficient airflow space must be reserved inside the air-cooled energy storage cabinet. The battery packs are usually arranged sparsely, and the high-power fans, air ducts, and filters themselves occupy a large amount of valuable space inside the cabinet. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid-cooled energy storage cabinet to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a liquid-cooled energy storage cabinet, comprising a main frame, wherein the interior of the main frame is divided into an independent energy compartment and an electrical compartment by vertically arranged partitions, a battery rack is provided in the energy compartment, a battery pack is detachably installed in the battery rack, a liquid-cooled plate is attached to the side of each battery pack, a flow channel is provided inside the liquid-cooled plate, and the flow channels of adjacent liquid-cooled plates are connected in series through liquid-cooled pipes; The inlet and outlet of the liquid cooling pipeline extend to the electrical compartment and are connected to the outlet and inlet of the liquid cooling unit, respectively. The liquid cooling unit is fixed to the bottom plate of the electrical compartment by a liquid cooling air conditioning bracket. The front frame is equipped with a front door assembly, and a square aerosol fire extinguishing box is installed on the top of the electrical compartment. The square aerosol fire extinguishing box is fixed to the front door assembly. A dehumidifier is also installed on the inside of the front door assembly. The air outlet of the dehumidifier is connected to an air conditioning duct. The air conditioning duct passes through the opening in the partition to introduce dry air into the energy compartment.

[0006] Preferably, the battery rack is fixed to the base plate of the main frame by a welding base, and the liquid cooling pipes are supported by multiple liquid cooling pipe supports and fixed to the battery rack of the main frame.

[0007] Preferably, the electrical compartment is also equipped with a high-voltage box and a distribution box, which are fixed side by side on the side of the partition facing the electrical compartment.

[0008] Preferably, the inner wall of the energy chamber is covered with a fireproof and heat-insulating material layer.

[0009] Preferably, the bottom of the welding base is provided with rubber pads.

[0010] Preferably, the front door assembly is connected to the main frame via a hinge and is locked via a linkage lock base installed on the inside of the front door assembly.

[0011] Preferably, a rotating alarm light is provided on the top outer side of the energy chamber, and the rotating alarm light is fixed by an alarm light mounting plate.

[0012] Preferably, the energy compartment and the electrical compartment are equipped with binding lines inside, and multiple binding lines are snapped onto the crossbeams and vertical beams of the main frame.

[0013] Preferably, the energy chamber is equipped with a smoke and temperature sensing bracket for mounting smoke and temperature sensors.

[0014] Preferably, lifting eye bolts are provided at the top four corners of the main frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a design where the liquid cooling plate is directly attached to the side of the battery pack, resulting in an extremely short heat conduction path. Utilizing the advantages of liquid's high specific heat capacity and strong thermal conductivity, it can quickly and efficiently remove the heat generated during battery charging and discharging. This solves the problem of low heat dissipation efficiency caused by air cooling due to air's low specific heat capacity and poor thermal conductivity. Through a series of liquid cooling pipes forming a continuous coolant circulation, combined with the precise temperature control of the liquid cooling unit, the temperature difference of the battery clusters can be accurately controlled within a reasonable range. This avoids the local hot spots and temperature unevenness that are prone to occur in air cooling systems, thereby effectively slowing down battery degradation, ensuring battery consistency, and significantly extending battery life.

[0016] 2. Unlike air-cooled systems, liquid cooling systems do not require large ventilation ducts. The liquid cooling plate is integrated into the side of the battery pack, and the liquid cooling pipes are neatly arranged with brackets, greatly reducing the space occupied inside the cabinet. The dual-compartment physical isolation design and the centralized arrangement of electrical components make the internal structure more compact, thus accommodating more battery capacity in the same cabinet volume and effectively improving the overall energy density of the energy storage cabinet. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the liquid-cooled energy storage cabinet of the present invention.

[0018] Figure 2 This is a schematic diagram of the energy compartment and electrical compartment of the present invention.

[0019] Figure 3 This is a schematic diagram of the front door assembly of the present invention.

[0020] Figure 4 This is a schematic diagram of the energy chamber structure of the present invention.

[0021] Figure 5 This is a schematic diagram of the electrical compartment of the present invention.

[0022] Figure 6 This is a schematic diagram of the liquid cooling pipeline of the present invention.

[0023] In the diagram: 1-Main frame; 2-Partition; 3-Energy compartment; 4-Electrical compartment; 5-Battery rack; 6-Battery pack; 7-Liquid cooling plate; 8-Liquid cooling pipeline; 9-Liquid cooling pipeline bracket; 10-Liquid cooling unit; 11-Liquid cooling air conditioning bracket; 12-High voltage box; 13-Distribution box; 14-Square aerosol fire extinguishing box; 15-Rubber pad; 16-Dehumidifier; 17-Air conditioning duct; 18-Rotating alarm light; 19-Alarm light mounting plate; 20-Front door assembly; 21-Link lock base; 22-Tied strip; 23-Smoke and temperature sensor bracket; 24-Lifting eye bolt; 25-Welded base; 26-Fireproof and heat-insulating material layer. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1 The present invention provides a technical solution: the liquid-cooled energy storage cabinet provided in the embodiments of the present invention aims to solve the structural defects of traditional air-cooled energy storage cabinets, such as low heat dissipation efficiency and poor temperature uniformity due to low specific heat capacity and poor thermal conductivity of air, and low energy density due to large space occupied by air duct layout.

[0026] like Figure 2 As shown, the liquid-cooled energy storage cabinet includes a main frame 1 that forms the main structure of the cabinet. The interior of the main frame 1 is divided into an independent energy compartment 3 and an electrical compartment 4 by vertically arranged partitions 2. This dual-compartment physical isolation structure effectively isolates the path of battery thermal runaway risk spreading to electrical equipment, fundamentally improving safety.

[0027] like Figure 4 As shown, a battery rack 5 is installed inside the energy compartment 3. The battery rack 5 is fixed to the base plate of the main frame 1 by a welding base 25, which ensures the stability of the load-bearing structure. The battery pack 6 is installed on the battery rack 5 in a detachable manner, which facilitates later maintenance and replacement.

[0028] The liquid cooling system is the core component. Each battery pack 6 has a liquid cooling plate 7 attached to its side. The liquid cooling plate 7 has flow channels machined inside. The flow channels of adjacent liquid cooling plates 7 are connected in series through liquid cooling pipes 8 to form a continuous coolant circulation path.

[0029] like Figure 6 As shown, the liquid cooling pipeline 8 is supported by multiple liquid cooling pipeline brackets 9 and fixed on the main frame 1 and the battery rack 5 to prevent the pipeline from loosening or wearing due to vibration. The inlet and outlet of the liquid cooling pipeline 8 extend to the electrical compartment 4 and are connected to the outlet and inlet of the liquid cooling unit 10, respectively.

[0030] The liquid cooling plate is in direct contact with the battery pack, resulting in a short heat conduction path. This reduces the temperature control range and allows for rapid heat removal. Dedicated pipe supports prevent stress concentration and wear leakage caused by cabinet vibration or thermal expansion and contraction.

[0031] The liquid cooling unit 10 serves as the circulating power source and heat exchange core. It is firmly fixed to the base plate of the electrical compartment 4 by the liquid cooling air conditioning bracket 11. During operation, the coolant circulates in the closed pipeline under the drive of the liquid cooling unit 10. When it flows through the liquid cooling plate 7, it efficiently absorbs the heat generated by the charging and discharging of the battery and carries the heat to the liquid cooling unit 10 for centralized heat dissipation. This achieves precise control of the temperature difference of the battery cluster within a reasonable range and greatly extends the battery life.

[0032] like Figure 5 As shown, the electrical compartment 4 is also equipped with a high-voltage box 12 and a distribution box 13, which are fixed side by side on the side of the partition 2 facing the electrical compartment 4. This layout allows all major electrical control units to be centrally managed, with neat wiring and easy maintenance.

[0033] The top of the electrical compartment 4 is equipped with a square aerosol fire extinguishing box 14, which is directly fixed to the front door assembly 20, forming an integrated structure with the door. When the fire sensor is triggered, the extinguishing agent can quickly cover the entire cabinet space from top to bottom, achieving efficient fire extinguishing without dead angles.

[0034] like Figure 3 As shown, the implementation of the environmental control system includes a dehumidifier 16 installed on the inner side of the front door assembly 20. The air outlet of the dehumidifier 16 is connected to an air conditioning duct 17. The air conditioning duct 17 passes through the opening on the partition 2 to accurately introduce dry air into the energy chamber 3. This structure effectively prevents condensation inside the cabinet, keeps the battery working environment dry, and does not require additional space for the duct, thus improving space utilization.

[0035] The front of the main frame 1 is provided with a front door assembly 20. The front door assembly 20 is connected to the main frame 1 by a hinge, and the large-area door body is stably locked and sealed by the linkage lock base 21 installed on its inner side, so as to ensure the overall protection level of the cabinet.

[0036] The auxiliary safety and structural system includes a rotating alarm light 18 installed on the top outer side of the energy chamber 3. The rotating alarm light 18 is fixed by a dedicated alarm light mounting plate 19 for on-site visual alarm.

[0037] The energy compartment 3 and the electrical compartment 4 are equipped with multiple binding wires 22. The binding wires 22 are snapped onto the horizontal and vertical beams of the main frame 1 to organize and fix all power and signal cables and prevent the risk of short circuits caused by their mess.

[0038] The energy chamber 3 is equipped with a smoke and temperature sensing bracket 23 for installing smoke and temperature sensors, forming a complete early warning system. The inner wall of the energy chamber 3 is covered with a fireproof and heat-insulating material layer 26, which plays a role in flame retardancy and heat insulation, providing the final physical protection barrier against thermal runaway. The bottom of the welded base 25 is bonded with rubber pads 15, which play a role in shock absorption, noise reduction and cabinet leveling. The top four corners of the main frame 1 are inserted with lifting eye bolts 24, which facilitates the transportation and installation of the cabinet.

[0039] When the battery pack 6 generates heat during charging and discharging, the heat is rapidly transferred from the surface of the battery pack 6 to the liquid cooling plate 7 through thermal conduction because the liquid cooling plate 7 is installed in close contact with its side. Driven by the pump built into the liquid cooling unit 10, the coolant forms a closed loop flow in the flow channels of the liquid cooling plate 7 connected in series by the liquid cooling pipes 8. The high-temperature coolant that has absorbed the heat from the battery is continuously transported to the liquid cooling unit 10 in the electrical compartment 4 through the liquid cooling pipes 8.

[0040] The liquid cooling unit 10 serves as the system's cooling tower. Its internal condenser and fan exchange the heat carried by the coolant with the external environment, thus cooling the coolant itself. The cooled coolant is then pumped back to the liquid cooling plate 7 in the energy chamber 3 to begin absorbing heat again. This continuous cycle ensures continuous and efficient cooling of the battery pack, guaranteeing the uniformity and stability of the battery cluster temperature.

[0041] The physical isolation between the energy compartment 3 and the electrical compartment 4 formed by the vertical partition 2 not only physically isolates the potential thermal runaway risk of the battery from the impact on key electrical equipment such as the high-voltage box 12 and the distribution box 13, but also creates conditions for implementing different environmental management strategies in the two areas.

[0042] When the sensor on the smoke and temperature sensing bracket 23 detects a fire signal, the square aerosol fire box 14 fixed to the top of the front door assembly 20 is immediately activated, and the extinguishing agent quickly diffuses from top to bottom in the sealed space of the energy compartment 3 and the electrical compartment 4 to achieve efficient fire extinguishing.

[0043] The dehumidifier 16 directs dry air into the energy chamber 3 through the air conditioning duct 17, effectively controlling the humidity of the battery's working environment and preventing condensation. At the same time, it avoids introducing dust and moisture by using large ventilation holes as in traditional air-cooled designs.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled energy storage cabinet, comprising a main frame (1), characterized in that: The main frame (1) is divided into an independent energy compartment (3) and an electrical compartment (4) by a vertically arranged partition (2). A battery rack (5) is provided in the energy compartment (3). A battery pack (6) is installed in the battery rack (5) in a detachable manner. A liquid cooling plate (7) is attached to the side of each battery pack (6). A flow channel is provided inside the liquid cooling plate (7). The flow channels of adjacent liquid cooling plates (7) are connected in series through liquid cooling pipes (8). The inlet and outlet of the liquid cooling pipeline (8) are both extended to the electrical compartment (4) and connected to the outlet and inlet of the liquid cooling unit (10) respectively. The liquid cooling unit (10) is fixed to the bottom plate of the electrical compartment (4) by the liquid cooling air conditioning bracket (11). The front door assembly (20) is provided at the front of the main frame (1), and a square aerosol fire box (14) is provided at the top of the electrical compartment (4). The square aerosol fire box (14) is fixed on the front door assembly (20). A dehumidifier (16) is also provided on the inner side of the front door assembly (20). The air outlet of the dehumidifier (16) is connected to an air conditioning duct (17). The air conditioning duct (17) passes through the opening on the partition (2) to introduce dry air into the energy compartment (3).

2. The liquid-cooled energy storage cabinet according to claim 1, characterized in that: The battery rack (5) is fixed to the base plate of the main frame (1) by a welding base (25), and the liquid cooling pipeline (8) is supported by multiple liquid cooling pipeline brackets (9) and fixed on the battery rack (5) of the main frame (1).

3. The liquid-cooled energy storage cabinet according to claim 1, characterized in that: The electrical compartment (4) is also equipped with a high-voltage box (12) and a distribution box (13), which are fixed side by side on the side of the partition (2) facing the electrical compartment (4).

4. The liquid-cooled energy storage cabinet according to claim 1, characterized in that: The inner wall of the energy chamber (3) is covered with a fireproof and heat-insulating material layer (26).

5. A liquid-cooled energy storage cabinet according to claim 2, characterized in that: The bottom of the welding base (25) is provided with rubber pads (15).

6. The liquid-cooled energy storage cabinet according to claim 1, characterized in that: The front door assembly (20) is connected to the main frame (1) via a hinge and is locked via a linkage lock base (21) installed inside the front door assembly (20).

7. The liquid-cooled energy storage cabinet according to claim 1, characterized in that: A rotating alarm light (18) is provided on the top outer side of the energy chamber (3), and the rotating alarm light (18) is fixed by an alarm light mounting plate (19).

8. A liquid-cooled energy storage cabinet according to claim 1, characterized in that: The energy compartment (3) and the electrical compartment (4) are equipped with binding lines (22), and multiple binding lines (22) are snapped onto the horizontal and vertical beams of the main frame (1).

9. A liquid-cooled energy storage cabinet according to claim 1, characterized in that: The energy chamber (3) is equipped with a smoke and temperature sensing bracket (23) for installing smoke and temperature sensors.

10. A liquid-cooled energy storage cabinet according to claim 1, characterized in that: The main frame (1) is provided with lifting eye bolts (24) at the top four corners.

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