Energy storage liquid cooling equipment with novel air duct

Abstract

The invention relates to the technical field of energy storage, in particular to energy storage liquid cooling equipment with a novel air duct. An existing air channel is limited by a heat dissipation window and a cabinet body space, special-shaped design has to be used, production difficulty and wind resistance are increased, sealing performance detection is difficult, and hot air backflow is prone to occurring. According to the energy storage liquid cooling equipment with the novel air duct, the partition plate is arranged in the cabinet body to distinguish the energy storage part and the heat dissipation part, a PCS and a liquid cooling unit which are large in heat productivity are subjected to centralized heat dissipation, and the PCS and the liquid cooling unit can be subjected to heat dissipation through the heat dissipation partition plate, the independent fan and the ventilation pipeline. The air duct structure is provided with an air inlet and a heat dissipation window on a cabinet door, an inner partition plate is connected with a ventilation pipeline and forms a hollow interlayer with the heat dissipation window, and the inner partition plate is provided with a sealing part, a detachable sealing window and the like. The air duct is simple in structural design, free in position, free of being tightly attached to a heat dissipation window, capable of reducing air resistance and hot air backflow, convenient to produce and maintain and capable of improving heat dissipation efficiency and equipment reliability.

Description

Technical Field

[0001] The invention relates to the technical field of energy storage, and in particular to an energy storage liquid cooling device with a novel air duct. Background Art

[0002] Energy storage is an important technology and basic equipment to support new power systems. It can provide peak load regulation, frequency regulation, standby, black start, demand response support and other services for power grid operation. It is an important means to improve the flexibility, economy and safety of traditional power systems. At present, the technical route of energy storage thermal management is mainly based on air cooling and liquid cooling. The air cooling structure is simple, but the heat exchange efficiency is low and precise temperature control cannot be achieved. Compared with traditional air cooling, liquid cooling uses the high thermal conductivity and high heat capacity characteristics of liquid to replace air as a heat dissipation medium, and the heat dissipation path is short. The low-temperature liquid is directly supplied to the battery cell equipment through the cold distribution unit (CDU, Cold Distribution Unit) to achieve precise heat dissipation, thereby reducing the system's self-consumption of electricity. Therefore, the liquid cooling system has become the mainstream choice for industrial and commercial energy storage.

[0003] The power conversion system (PCS) and liquid cooling unit in the liquid cooling equipment are the only equipment that needs to communicate with the external environment of the cabinet and requires heat exchange. When these two components exchange heat with the outside world, air cooling equipment is usually used, which requires the air duct and the heat dissipation window to be sealed. If the sealing is poor, the hot air that should be discharged outside the cabinet will return to the cabinet and be sucked into other equipment again, causing hot air reflux and secondary heating. This will greatly affect the working efficiency of the equipment and even damage electronic devices.

[0004] The current design of air ducts faces the following problems: 1. The air duct currently designed needs to be close to the heat dissipation window, but the heat dissipation window is installed on the cabinet door, and its position and size are limited by the size, aesthetics and protection level of the cabinet door. The air inlet and outlet of the air duct are also limited by the cabinet space, and usually cannot be directly connected to the input and output. The air duct can only be shaped to avoid the limitation caused by space. The shaped wall surface not only increases the difficulty of design and processing, but also increases the wind resistance. It is also difficult for the shaped air duct to fully utilize the effective ventilation area of ​​the heat dissipation window; 2. When testing the sealing performance, the most direct method is to close the cabinet door to observe whether the two are tightly fitted. However, in the prior art, the air duct outlet is generally deep inside the cabinet, so this method is difficult to achieve; 3. Both of the above problems will lead to hot air reflux, that is, the cooling fan will suck back the air that has been heated after passing through the heating device and use it again for cooling. This will greatly reduce the heat dissipation efficiency and may even damage the heating device in severe cases. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a liquid-cooled energy storage device with separated energy storage and heat dissipation, comprising a cabinet, an energy storage part and a heat dissipation part. There is a first cabinet door on the front of the cabinet, a second cabinet door on the back of the cabinet, and a partition separating the energy storage part from the heat dissipation part. The energy storage part is a battery pack, and the heat dissipation part is equipped with a PCS and a liquid cooling unit with large heat dissipation capacity, so as to distinguish the heat dissipation demand level of the heat dissipation part and the energy storage part. The battery pack in the energy storage part is cooled by a liquid cooling pipe, which transfers heat from the battery pack to the liquid cooling unit, while the PCS and liquid cooling unit in the heat dissipation part are cooled by a high-power fan, which uses a fan to transfer heat through the ventilation duct. The advantage of this design is that all equipment with high heat generation are concentrated in the same space, which can provide more targeted heat dissipation.

[0006] Preferably, the PCS and the liquid cooling unit are separated by a heat dissipation partition. Since the heat dissipation of both is relatively large, separation by the heat dissipation partition enables the two to be in parallel positions in the heat dissipation air duct, and the exhausted hot air will not affect each other.

[0007] Furthermore, the PCS and the liquid cooling unit use their own independent fans to dissipate heat.

[0008] Furthermore, the ventilation duct is divided into a first ventilation duct and a second ventilation duct along the extension line of the heat dissipation partition. Fans and matching ventilation ducts are used to dissipate heat for two devices with higher heat generation respectively, and the problem of hot air being exchanged between the two devices will not occur.

[0009] A corresponding air duct structure is also designed based on the above-mentioned liquid-cooled energy storage device. There is an air inlet on the first cabinet door, and a heat dissipation window on the second cabinet door. When the fan is working, cool air is sucked in through the air inlet and hot air is discharged from the heat dissipation window. In order to prevent the hot air from flowing back, an inner partition is added. The inner partition has a through hole for connecting the ventilation duct. After the hot air is discharged from the ventilation duct, it will not be sucked back by the fan due to the blocking effect of the inner partition, thereby achieving the effect of preventing the hot air from flowing back.

[0010] There is a hollow interlayer between the inner partition and the heat dissipation window, and the hot air will pass through the hollow interlayer to reach the heat dissipation window. The ventilation duct in the prior art needs to be close to the heat dissipation window, and the sealing must be ensured to reduce the backflow of hot air. Through the design of this inner partition and hollow interlayer, the position and size of the ventilation duct can be made more free. The ventilation duct only needs to be connected to the through hole on the inner partition, and there is no restriction on the position and size of the through hole. The sealing requirement between the ventilation duct and the heat dissipation window is transferred to between the inner partition and the cabinet. Compared with the sealing between the ventilation duct and the heat dissipation window, the sealing between the inner partition and the cabinet is better achieved.

[0011] Preferably, the inner partition also has a sealing portion for sealing between the inner partition and the second cabinet door and the heat dissipation window.

[0012] Preferably, there are multiple through holes on the inner partition board to connect different ventilation ducts. Since fans are installed at the other ends of the ventilation ducts, hot air will not flow between the ventilation ducts, and the hot air discharged from multiple ventilation ducts will use the hollow interlayer together and then be discharged from the heat dissipation window. This heat dissipation method can effectively utilize the space of the hollow interlayer.

[0013] Preferably, the inner partition is provided with a detachable inspection window. When internal components are damaged, they can be repaired or replaced by directly removing the inspection window without removing the entire inner partition connected to the ventilation duct, thereby facilitating later maintenance.

[0014] Preferably, the heat dissipation window is a shutter structure, which can prevent accidental splashing of liquid and causing unnecessary damage.

[0015] Preferably, a detachable dust screen is provided on one side of the heat dissipation window close to the inner partition.

[0016] The advantages of the present invention are: 1. This air duct structure does not require the design of special-shaped ventilation ducts, nor does it require the ventilation ducts to be tightly fitted to the heat dissipation window, which is simpler and more convenient during production; since the ventilation ducts used in the air duct structure do not need to change direction, the wind resistance caused by collision with the pipe wall is greatly reduced, further preventing the hot air from flowing back; 2. The outstanding advantage of the present invention is that there is a hollow interlayer between the inner partition and the heat dissipation window, and the hot air will reach the heat dissipation window through the hollow interlayer. The ventilation duct in the prior art needs to be close to the heat dissipation window and must ensure sealing to reduce the backflow of hot air. After many operation experiments, it was found that even if the sealing is strengthened, the heat dissipation effect is very poor. However, through the design of this inner partition and hollow interlayer, the position and size of the ventilation duct can be made more free. The ventilation duct only needs to be connected in a straight line to the through hole on the inner partition. The position and size of the through hole can also be set according to the position of the ventilation duct. Many actual operation experiments have also been carried out. By comparison, it is found that this new air duct can greatly optimize the heat dissipation performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional image (half) of a liquid-cooled energy storage device.

[0018] Figure 2 This is the rear view of the liquid-cooled energy storage device.

[0019] Figure 3 This is a cross-sectional diagram of the new air duct. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments and drawings.

[0021] like Figure 1 and Figure 2 The liquid-cooled energy storage device shown includes a first cabinet door 1 , an air inlet 2 , an energy storage unit 6 , a heat dissipation unit 4 , a heat dissipation baffle 7 , an independent battery 3 , a cabinet body 5 , a second cabinet door 9 , and a heat dissipation window 10 .

[0022] Both the first cabinet door 1 and the second cabinet door 2 can be opened, and there is an air inlet 2 on the first cabinet door 1, and a heat dissipation window 10 on the second cabinet door 9. Both the air inlet 2 and the heat dissipation window 10 are shutters for waterproofing, and the direction of the shutters is oblique, with the inner side of the cabinet higher and the outer side of the cabinet lower, so that water droplets hitting the air inlet 2 and the heat dissipation window 10 can flow along the shutter structure to the outside of the cabinet body 5.

[0023] The liquid-cooled energy storage device shown in this embodiment separates the energy storage part 6 and the heat dissipation part 4. The energy storage part 6 is used to store the battery pack. The heat dissipated by the battery pack is concentrated to the heat dissipation part 4 through the liquid cooling pipe. The heat dissipation part 4 is further divided into two parts by the heat dissipation partition 7. A liquid cooling unit is installed above the heat dissipation partition 7, and a power converter is installed below the heat dissipation partition 7. Both are equipped with independent cooling fans.

[0024] Preferably, there is an independent battery 3 in the heat dissipation unit 4 to prevent damage to the device due to the inability to discharge heat when there is a sudden power outage.

[0025] Preferably, a master control button is also installed below the air inlet 2. The master control button can emit light and can be directly started through the master control button on the first cabinet door 1. The master control button can also display the current working status by emitting light, such as green light for normal operation, yellow light for fault, and red light for shutdown status.

[0026] like Figure 3 The new air duct shown includes an upper air duct 12 , a lower air duct 13 , an inner partition 11 , a heat dissipation window 10 , a second cabinet door 9 , a first cabinet door 1 , an air inlet 2 and a cabinet body 5 .

[0027] Relatively cold air will be sucked in from the air inlet 2 on the first cabinet door 1, and then the upper air duct 12 and the lower air duct 13 are used to receive the hot air blown out by the independent fans of the liquid cooling unit and the power converter respectively, and then sent to the hollow interlayer 14 between the inner partition 11 and the heat dissipation window 10 through the through holes on the inner partition 11, and finally discharged out of the cabinet through the heat dissipation window 10 on the second cabinet door 9.

[0028] This new type of heat dissipation duct adopts straight ducts and ventilation pipes (upper duct 12 and lower duct 13), reducing the resistance caused by the air hitting the wall when turning. In addition, by adding an inner partition 11, the sealing requirement between the ventilation duct and the heat dissipation window 10 is transferred to between the inner partition 11 and the cabinet 5, and the coupling relationship between the ventilation duct and the heat dissipation window 10 is released, so that the opening position and size of the ventilation duct are more flexible, and the ventilation and heat dissipation effect is better.

[0029] After multiple long-term actual operation tests, this new type of heat dissipation duct can effectively reduce the temperature inside the cabinet 5 and prevent hot air from flowing back, especially effectively reducing the temperature inside the heat dissipation part 4.

[0030] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0031] Although the above describes the specific implementation methods of the present invention, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. An energy storage liquid cooling device with a novel air duct, comprising a cabinet, a first cabinet door on the front of the cabinet, a second cabinet door on the back of the cabinet, an energy storage part and a heat dissipation part inside the cabinet, the heat dissipation part comprising a liquid cooling unit, the energy storage part transfers heat to the liquid cooling unit in the heat dissipation part through a liquid cooling pipe, It is characterized in that A new type of air duct is used for heat dissipation, an air inlet window is installed on the first cabinet door, a heat dissipation window is installed on the second cabinet door, an inner partition installed parallel to the first cabinet door and the second cabinet door is provided in the cabinet body, the air inlet window, the heat dissipation window and the inner partition are located at the same horizontal position, a hollow interlayer is formed between the inner partition and the heat dissipation window on the second cabinet door, a through hole is provided on the inner partition, a ventilation duct is tightly connected to the through hole, a fan is installed at the other end of the ventilation duct, and the ventilation duct has no bends.

2. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The heat dissipation part includes a plurality of heat-generating components, and the heat-generating components are separated by heat dissipation partitions.

3. The energy storage liquid cooling device with a novel air duct as claimed in claim 2, characterized in that: Each of the heat generating components is equipped with an independent ventilation duct and a fan. The ventilation ducts are separated along the extension line of the heat dissipation baffle and are respectively connected to the corresponding through holes on the inner baffle.

4. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The inner partition is provided with a detachable inspection window.

5. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The heat dissipation window and the air inlet window are louver structures.

6. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The heat dissipation window and the air inlet window are also provided with detachable dustproof nets.

7. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The inner partition plate is provided with a sealing portion for sealing with the second cabinet door and the heat dissipation window.

8. The energy storage liquid cooling device with a novel air duct as claimed in claim 1, characterized in that: The heat dissipation unit also includes an independent power supply, and the independent power supply is connected to the fan.

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