Battery energy storage station temperature control system

Abstract

The utility model provides a battery energy storage station temperature control system, which relates to the field of battery heat dissipation and comprises a battery energy storage station shell, the interior of the battery energy storage station shell is divided into a battery storage area and a cooling air supply area through a baffle, an air inlet is arranged above the baffle, an air outlet channel is arranged below the baffle, and a plurality of battery packs are arranged in the battery storage area. A cooling system and an air inducing device are arranged in the cooling air supply area, the cooling system is located on the other side of the air inlet, and the air inducing device is arranged below the cooling system. The first cooling mode, the second cooling mode and the dehumidification mode can be reasonably selected to cool and dehumidify gas in the energy storage station according to the temperature and humidity working conditions of airflow in the energy storage station, single-stage cooling and dehumidification can be achieved, two-stage cooling and dehumidification can also be achieved, and use flexibility is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of battery heat dissipation, and particularly relates to a temperature control system for a battery energy storage station. Background Technique

[0002] The electrochemical performance, safety and life cycle of lithium batteries are greatly affected by the working temperature. The ideal battery working temperature window is between 25°C and 35°C. Although high temperature may improve the battery performance in the short term, long-term high temperature environment will accelerate the aging of the battery. During low-temperature charging, lithium dendrites are very likely to form on the graphite negative electrode, which will then pierce the diaphragm and cause internal short circuit. The serious consequence will be that the battery smokes, catches fire or even explodes. The temperature difference between the modules in the battery pack shall not exceed 5°C, otherwise the consistency of the battery cells in the module will deteriorate, and overcharging and over-discharging are very likely to occur. Therefore, the thermal management of lithium batteries is very important.

[0003] Generally, the temperature of the computer room should be controlled between 20°C and 25°C. To achieve this goal, an efficient air conditioning system needs to be configured and the operation mode of the air conditioner should be adjusted according to the actual situation of the computer room. The humidity of the computer room should generally be maintained between 40% and 60% RH. The humidity of the computer room can be adjusted by installing humidity sensors and dehumidifiers or humidifiers. Reasonable ventilation equipment, such as fans, air conditioners, etc., should be configured in the computer room to ensure smooth air circulation. At the same time, the overly dense arrangement between servers should also be avoided to ensure the smoothness of air circulation. There are components such as a cooling system, an inverter, and each battery pack module inside the energy storage station. These components need to form a temperature control whole and perform operations such as cooling and dehumidifying on this temperature control whole to effectively ensure the normal and stable operation of the energy storage station.

[0004] For example, the patent applications with publication numbers CN117117387A and CN218735760U in the prior art can only use a set of refrigeration systems alone to complete cooling, and cannot use one set or multiple sets in combination to achieve the effect of two-stage cooling and dehumidification. Therefore, a temperature control system for a battery energy storage station is needed to solve the above technical problems. Content of the Utility Model

[0005] In view of this, the utility model provides a temperature control system for a battery energy storage station. Compared with the traditional heat dissipation system, the utility model can reasonably select the first cooling mode, the second cooling mode and the dehumidification mode to cool and dehumidify the gas in the energy storage station according to the temperature and humidity conditions of the internal air flow of the energy storage station, that is, it can achieve single-stage cooling and dehumidification, and can also achieve two-stage cooling and dehumidification, greatly improving the flexibility of use.

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

[0007] A temperature control system for a battery energy storage station, including a housing of the battery energy storage station. The interior of the housing of the battery energy storage station is separated into a battery storage area and a cooling air supply area by a baffle. An air inlet is provided above the baffle, and an air outlet channel is provided below the baffle. A number of battery packs are arranged in the battery storage area, and there are gaps between each battery pack. A cooling system and an air guiding device are arranged in the cooling air supply area. The cooling system is located on the other side of the air inlet, and the air guiding device is arranged below the cooling system.

[0008] Further, the cooling system includes an air-liquid heat exchanger, an evaporator, a cooling heat exchanger, a heat pipe module with a uniform temperature plate, and a compression condensation device. The evaporator and the air-liquid heat exchanger are installed inside the housing of the battery energy storage station and are both located above the air guiding device. The air-liquid heat exchanger is the first set of heat exchange devices. The cooling heat exchanger, the heat pipe module with a uniform temperature plate, and the compression condensation device are installed outside the housing of the battery energy storage station. The cooling heat exchanger is fixedly connected to the heat pipe module with a uniform temperature plate. The cooling heat exchanger and the air-liquid heat exchanger are connected by pipelines to form a first cooling loop. The evaporator and the compression condensation device are connected by pipelines to form a second set of heat exchange devices.

[0009] Further, the cooling heat exchanger and the compression condensation device are connected by pipelines to form a second cooling loop.

[0010] Further, the compression condensation device includes a compressor and a condenser, and the compressor and the condenser are connected by pipelines.

[0011] Further, the outside of the heat pipe module with a uniform temperature plate is provided with metal fins.

[0012] Further, the air-liquid heat exchanger adopts a plate-fin heat exchanger.

[0013] Further, a temperature sensor is also installed at the air inlet.

[0014] Further, a humidity sensor is also installed at the air inlet.

[0015] Further, the air guiding device includes an air guiding pipeline and an air guiding fan. The air guiding pipeline is located below the air guiding fan, and the air guiding pipeline is of a conical structure.

[0016] Further, a support frame is installed at the bottom of the battery pack.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model is designed with a concise structure and convenient operation. Through the first heat exchange device formed by the air-liquid heat exchanger and the second heat exchange device formed by the cooperation of the evaporator and the compression condensation device, the cooling and dehumidification of the gas in the energy storage station can be reasonably selected according to the temperature and humidity conditions of the internal air flow of the energy storage station. The first cooling mode, the second cooling mode and the dehumidification mode can be used to cool and dehumidify the gas in the energy storage station, that is, single-stage cooling and dehumidification or two-stage cooling and dehumidification can be realized, and the flexibility of use is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 is the overall view of the present invention;

[0021] Among them, in the figure:

[0022] 1 - Battery energy storage station shell; 2 - Air duct; 3 - Air blower; 4 - Evaporator; 5 - Air-liquid heat exchanger; 6 - Cooling heat exchanger; 7 - Isothermal plate heat pipe module; 8 - Three-way valve; 9 - Compression condensation device; 10 - Air inlet; 11 - Battery pack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0024] Please refer to the attached Figure 1 , the present invention provides a temperature control system for a battery energy storage station, including a battery energy storage station shell 1. The interior of the battery energy storage station shell 1 is divided into a battery storage area and a cooling air supply area by a baffle. The battery storage area is separated from the cooling air supply area by the baffle. An air inlet 10 is opened above the baffle, and an air outlet channel is opened below the baffle. A plurality of battery packs 11 are arranged in the battery storage area, and there are gaps between each battery pack 11. A cooling system and an air guiding device are arranged in the cooling air supply area. The cooling system is located on the other side of the air inlet 10, and the air guiding device is arranged below the cooling system.

[0025] Preferably, the cooling system includes an air-liquid heat exchanger 5, an evaporator 4, a cooling heat exchanger 6, a heat pipe module 7 of a heat pipe plate, and a compression condensation device 9. The evaporator 4 and the air-liquid heat exchanger 5 are installed inside the battery energy storage station housing 1 and are both located above the air guiding device. The air-liquid heat exchanger 5 is the first set of heat exchange devices. Along the air flow direction, the air-liquid heat exchanger 5 and the evaporator 4 are arranged in sequence so that the air flow sequentially passes through the air-liquid heat exchanger 5 and the evaporator 4 for heat exchange. Moreover, the air flow is first cooled by the air-liquid heat exchanger 5 and then cooled and dehumidified by the evaporator 4, which is beneficial to improving the overall cooling and dehumidification efficiency of the system. The main heat exchange component is the evaporator 4, and the refrigeration and dehumidification capacity of the evaporator 4 is relatively high, which can centrally cool large heat-generating components such as inverters and battery packs 11 in the energy storage station, which is beneficial to the stable operation of a large-capacity energy storage station. The cooling heat exchanger 6, the heat pipe module 7 of the heat pipe plate, and the compression condensation device 9 are installed outside the battery energy storage station housing 1 and use ambient air for heat exchange. The cooling heat exchanger 6 is connected to the air-liquid heat exchanger 5 through a pipeline to form a first cooling circuit. The first cooling circuit is used to cool the air flow sent by the induced draft fan 3 from the air inlet 10. The principle of the first cooling circuit is as follows: After the liquid medium is cooled in the cooling heat exchanger 6, it enters the air-liquid heat exchanger 5 and exchanges heat with the hot air flow passing through the surface of the air-liquid heat exchanger 5. When the hot air flow is cooled, the liquid medium inside the air-liquid heat exchanger 5 absorbs heat and warms up and then re-enters the cooling heat exchanger 6. The heat of the high-temperature liquid medium inside the cooling heat exchanger 6 is transferred to the external environment by the heat pipe module 7 of the heat pipe plate to achieve cooling. The cooling heat exchanger 6 is fixedly connected to the heat pipe module 7 of the heat pipe plate. The heat pipe plate heat dissipation technology uses the heat pipe principle to transfer heat through the evaporation and condensation process of the working fluid, thereby realizing rapid heat conduction from the heat source to the radiator. A three-way valve 8 is installed on the cooling heat exchanger 6 and is respectively connected to the compression condensation device 9 and the air-liquid heat exchanger 5 through pipelines. The evaporator 4 and the compression condensation device 9 are connected through pipelines to form a second set of heat exchange devices.

[0026] Preferably, the cooling heat exchanger 6 and the compression condensation device 9 are connected through pipelines to form a second cooling circuit. The second cooling circuit is used to cool the refrigerant in the condenser. The air-liquid heat exchanger 5 and the condenser form a circuit with the same cooling condenser. The cooling heat exchanger 6 is connected to the air-liquid heat exchanger 5 and the condenser through the three-way valve 8. The cooling heat exchanger 6 can also be set to two or more, and one or more cooling heat exchangers 6 respectively form circuits with the air-liquid heat exchanger 5 and the condenser.

[0027] Preferably, the compression and condensation device 9 includes a compressor and a condenser. The compressor is connected to the condenser through a pipeline. The refrigerant can flow in the loop formed by the compression and condensation device 9 and the evaporator 4. During operation, the refrigerant is compressed and heated up in the compressor, and then flows from the outlet of the compressor into the condenser. Inside the condenser, it exchanges heat with the cold water flowing from the cooling heat exchanger 6 to the condenser. The refrigerant after being cooled flows out of the condenser, is throttled by a capillary pipeline, and then enters the evaporator 4. During the process of flowing through the evaporator 4, it exchanges heat with the air flow on the surface of the evaporator 4. After the air flow is cooled and the refrigerant is heated up, the heated refrigerant flows back into the compressor again to complete a cooling cycle.

[0028] Preferably, the external of the heat pipe module of the heat pipe vapor chamber 7 is provided with metal fins, which can increase the heat exchange area with the environment to achieve efficient heat exchange. The heat pipe vapor chamber heat dissipation technology utilizes the heat pipe principle and transfers heat through the evaporation and condensation process of the working fluid, thereby realizing rapid heat conduction from the heat source to the radiator. In the heat pipe module of the heat pipe vapor chamber 7, when the heat source generates heat, the liquid at the evaporation end of the heat pipe quickly evaporates into vapor. The vapor flows towards the condensation end under a small pressure difference, releases heat and re-condenses into liquid. The liquid then flows back to the evaporation end along the capillary structure inside the heat pipe to form a cycle. Using the heat pipe module of the heat pipe vapor chamber 7 for heat dissipation can quickly conduct heat from the heat source to the radiator, effectively reducing the temperature of the heat source without external power. Since the heat pipe module of the heat pipe vapor chamber 7 works relying on the capillary force and vapor pressure difference inside the heat pipe without external power, it is more energy-saving and reliable, and also has the advantages of small volume and light weight. The heat pipe module of the heat pipe vapor chamber 7 has a compact structure and occupies a small space, and is suitable for server environments with high-density deployment. The heat pipe module of the heat pipe vapor chamber 7 also has good isothermal performance, which can ensure a small temperature gradient between the heat source and the radiator, thereby achieving a more uniform heat distribution. The heat pipe module of the heat pipe vapor chamber 7 can also be replaced by a plate-fin heat exchanger, and forced convection is realized by blowing the fins with a fan to exchange heat with the atmospheric environment.

[0029] Preferably, the air-liquid heat exchanger 5 adopts a plate-fin heat exchanger, and the plate-fin heat exchanger can realize forced convection with the atmospheric environment by blowing the fins with a fan.

[0030] Preferably, a temperature sensor is also installed at the air inlet 10. The temperature sensor is used to monitor the air flow temperature at the air inlet 10. When the air flow temperature is higher than the preset value, the first set of heat exchange device and the second set of heat exchange device can be started to cool the air simultaneously; when the working temperature of the main bearing is lower than or equal to the preset value, only the first set of heat exchange device is started to cool the air.

[0031] Preferably, a humidity sensor is also installed at the air inlet 10. The humidity sensor is used to detect the humidity of the air flow in the internal space of the energy storage station. When the air flow temperature in the station is not higher than the preset value and the humidity is higher than the predetermined value, the first heat exchange device and the second heat exchange device are simultaneously turned on, and the temperature of the air flow after passing through the evaporator 4 is controlled to be lower than the dew point to complete the humidity reduction.

[0032] Preferably, the air extraction device includes an air extraction duct 2 and an air extraction fan 3. The air extraction duct 2 is located below the air extraction fan 3. The air extraction duct 2 is of a conical structure, which is beneficial to the air flow. The air extraction fan 3 can provide power for the air flow to pass through the air-liquid heat exchanger 5 and the evaporator 4, so as to complete the air flow circulation in the battery storage area and the cooling air supply area, which is beneficial to realizing uniform heat exchange of the gas in the station.

[0033] Preferably, a support frame is installed at the bottom of the battery pack 11 to keep the battery pack stable.

[0034] A temperature control system for a battery energy storage station according to the present invention can reasonably set the first cooling mode, the second cooling mode and the dehumidification mode according to different working conditions of the battery energy storage station. The first cooling mode is that only the first heat exchange device or the second heat exchange device works. The first cooling mode is applicable to the condition that the ambient temperature in the energy storage station is not too high and only a small amount of cooling capacity is required for normal operation. The second cooling mode is that on the basis of the first cooling mode, the first heat exchange device and the second heat exchange device work simultaneously. The second cooling mode is applicable to the condition that the temperature in the energy storage station is relatively high and a large amount of cooling capacity is required. The dehumidification mode is applicable to the condition that the ambient humidity in the energy storage station is relatively high and refrigeration and dehumidification are required at the same time. At this time, the first heat exchange device is maintained to perform primary cooling on the gas, and then the second heat exchange device is started to perform secondary cooling on the gas, so that the gas temperature drops below the dew point, and the water vapor in the air condenses in the evaporator 4 and precipitates in a liquid form to achieve the dehumidification function.

[0035] In this specification, each embodiment is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery energy storage station temperature control system, characterized in that: The invention comprises a battery energy storage station shell (1), wherein the interior of the battery energy storage station shell (1) is divided into a battery storage area and a cooling air supply area by a baffle, an air inlet (10) is provided above the baffle, and an air outlet channel is provided below the baffle, a plurality of battery packs (11) are arranged in the battery storage area, and each of the battery packs (11) has a gap therebetween, a cooling system and an air induction device are arranged in the cooling air supply area, the cooling system is located on the other side of the air inlet (10), and an air induction device is arranged below the cooling system.

2. A battery energy storage station temperature control system according to claim 1, characterized in that: The cooling system comprises an air-liquid heat exchanger (5), an evaporator (4), a cooling heat exchanger (6), a temperature-averaging plate heat pipe module (7) and a compression condensing device (9); the evaporator (4) and the air-liquid heat exchanger (5) are installed inside the battery energy storage station housing (1) and are both located above the induced draft device; the air-liquid heat exchanger (5) is a first set of heat exchange devices; the cooling heat exchanger (6), the temperature-averaging plate heat pipe module (7) and the compression condensing device (9) are installed outside the battery energy storage station housing (1); the cooling heat exchanger (6) is fixedly connected to the temperature-averaging plate heat pipe module (7); the cooling heat exchanger (6) and the air-liquid heat exchanger (5) are connected via pipelines to form a first cooling circuit; the evaporator (4) and the compression condensing device (9) are connected via pipelines to form a second set of heat exchange devices.

3. A battery energy storage station temperature control system according to claim 2, characterized in that: The cooling heat exchanger (6) is connected to the compression condensation device (9) via a pipeline to form a second cooling circuit.

4. A battery energy storage station temperature control system according to claim 2, characterized in that: The compression and condensation device (9) comprises a compressor and a condenser, and the compressor and the condenser are connected via a pipeline.

5. A battery energy storage station temperature control system according to claim 2, characterized in that: The air-liquid heat exchanger (5) is a plate-fin heat exchanger.

6. A battery energy storage station temperature control system according to claim 2, characterized in that: The temperature-averaging plate heat pipe module (7) is provided with metal fins on the outside.

7. A battery energy storage station temperature control system according to claim 1, characterized in that: A temperature sensor is also installed at the air inlet (10).

8. A battery energy storage station temperature control system according to claim 1, characterized in that: A humidity sensor is also installed at the air inlet (10).

9. A battery energy storage station temperature control system according to claim 1, characterized in that: The induced air device comprises an induced air duct (2) and an induced air fan (3); the induced air duct (2) is located below the induced air fan (3); and the induced air duct (2) is a conical structure.

10. A battery energy storage station temperature control system according to claim 1, characterized in that: A support frame is installed at the bottom of the battery pack (11).

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