Energy storage power station liquid cooling system with dehumidification function in series-parallel connection mode

Abstract

The utility model provides an energy storage power station liquid cooling system with a dehumidification function in a series-parallel mode. The energy storage power station liquid cooling system has a series mode and a parallel mode. Wherein the series connection mode comprises a refrigerant loop composed of a condenser, an EXV, an evaporator, a chiller and a compressor which are sequentially connected to form a loop, a cooling liquid loop composed of a water pump, the chiller and a battery cabinet which are sequentially connected to form a loop, and a dehumidification loop composed of the battery cabinet and the evaporator. The parallel mode comprises a first refrigerant branch composed of a condenser, an EXV, a chiller and a compressor which are sequentially connected to form a loop, a second refrigerant branch composed of a condenser, an S-TXV, an evaporator and a compressor which are sequentially connected to form a loop, and a dehumidification loop. The dehumidification module is arranged on the liquid cooling system unit in a series connection or parallel connection mode, so that humid air is dried through the dehumidification module of the liquid cooling system unit, the structure is simple, energy consumption is reduced, and the air drying degree is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling of energy storage power stations, and in particular to a liquid cooling system of an energy storage power station with a dehumidification function in a series-parallel mode. Background Art

[0002] With the rapid development of the energy storage industry, breakthroughs have been made in thermal management technology for energy storage systems. Liquid cooling technology, with its advantages of high heat dissipation efficiency and precise temperature control, has gradually become the mainstream solution. However, liquid cooling units generally lack active dehumidification capabilities, resulting in a large amount of condensation inside the battery box. This phenomenon is particularly severe in warm and rainy areas, which can easily cause internal short circuits and accelerate corrosion of the cold plate, affecting the normal operation of the battery. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of the utility model is to provide a series-parallel mode energy storage power station liquid cooling system with dehumidification function, which can effectively solve the humidity problem in the energy storage box, optimize the battery cabinet environment, and improve its operating efficiency.

[0004] The utility model adopts the following technical solution: a liquid cooling system for an energy storage power station with a dehumidification function in series mode, comprising a refrigerant pipeline consisting of a condenser, an EXV (throttle valve, electronic expansion valve, the same below), an evaporator, a chiller, and a compressor connected in sequence to form a loop, and also comprising a fan arranged near the condenser and a fan arranged near the evaporator;

[0005] The coolant pipeline consists of a water pump, chiller, and battery cabinet that are connected in sequence to form a loop;

[0006] Dehumidification pipeline, consisting of battery cabinet and evaporator;

[0007] The chiller includes a refrigerant pipe connection port, which is connected to the refrigerant pipe connection port of the compressor and evaporator respectively; the chiller also includes a coolant pipe connection port, which is connected to the coolant pipe connection port of the water pump and battery cabinet respectively;

[0008] The evaporator includes a refrigerant pipe connection port, which is connected to the refrigerant pipe connection port of the chiller and EXV respectively; the evaporator also includes a dehumidification pipe inlet and outlet, which is connected to the dehumidification pipe inlet and outlet of the battery cabinet;

[0009] The battery cabinet includes coolant pipe connection ports, which are connected to the coolant pipe connection ports of the water pump and chiller respectively.

[0010] During operation, the refrigerant is compressed by the compressor and then enters the condenser for cooling. The cooled refrigerant is throttled by the EXV and then flows into the evaporator and chiller for heat exchange (in the chiller, it exchanges heat with the high-temperature coolant flowing out of the battery cabinet, and in the evaporator, it exchanges heat with the humid air discharged from the battery cabinet). The refrigerant that absorbs heat continues to return to the compressor and is pressurized to form a cycle.

[0011] The liquid cooling system works on the coolant in the battery cabinet of the energy storage power station. The coolant is connected from the liquid outlet of the battery cabinet to the chiller for cooling, and then returns to the liquid inlet of the battery cabinet of the energy storage power station.

[0012] The wet air pipeline and the battery cabinet air outlet are connected to the dehumidification module (i.e., the evaporator and the fan. The fan is set in the dehumidification module to blow air to the evaporator of the dehumidification module on the one hand, and on the other hand, to force the air in the dehumidification pipeline to flow in a certain direction) for cooling and dehumidification.

[0013] Furthermore, PT sensors are provided at the liquid outlet and liquid inlet of the battery cabinet and the compressor of the energy storage power station.

[0014] A liquid cooling system for an energy storage power station with a dehumidification function in parallel mode is provided. Based on a liquid cooling system for an energy storage power station with a dehumidification function in series mode, a refrigerant pipeline is divided into two branches: a first refrigerant branch is composed of a condenser, an EXV, a chiller, and a compressor connected in sequence to form a loop, and also includes a fan arranged near the condenser;

[0015] The second refrigerant branch is connected in sequence to form a condenser, S-TXV (thermostatic expansion valve with solenoid valve, the same below), evaporator, compressor, and also includes a fan installed near the evaporator;

[0016] The chiller includes a refrigerant pipe connection port, which is connected to the refrigerant pipe connection ports of the compressor and EXV respectively;

[0017] The evaporator includes a refrigerant pipeline connection port, which is respectively connected to the refrigerant pipeline connection ports of the compressor and the S-TXV.

[0018] During operation, the high-temperature coolant flowing out of the battery cabinet of the energy storage power station goes to the chiller to exchange heat with the refrigerant, and the cooled coolant returns to the battery cabinet of the energy storage power station.

[0019] In dehumidification mode, the direction of humid air is as follows:

[0020] The high-temperature and high-humidity air coming out of the battery cabinet of the energy storage power station is cooled and dehumidified by the dehumidification module evaporator, and then dried by the fan and sent back to the battery cabinet of the energy storage power station.

[0021] Furthermore, a plurality of battery packs are arranged at intervals in the battery cabinet of the energy storage power station, and the battery packs are arranged at intervals to form gaps, and the gaps constitute air ducts. Air inlets / outlets are provided at the bottom of the battery cabinet of the energy storage power station, and dehumidification pipelines are connected to these air inlets / outlets to form dehumidification outlets and dehumidification inlets.

[0022] Furthermore, the liquid outlet of the battery cabinet and the liquid inlet of the compressor are both provided with PT sensors.

[0023] Compared to the existing technology, the present invention has the following beneficial effects: the humid air in the battery cabinet of the energy storage power station is sucked into the dehumidification module through the fan, and the start and stop of the dehumidification module is controlled by the start and stop of the fan. After passing through the dehumidification module, the humid air is converted into cooled dry air. To further improve the dehumidification effect, the heating device can be turned on to assist in drying. The liquid cooling system casing and the battery cabinet casing of the energy storage power station form an air duct isolated from the outside world; the liquid cooling system is provided with a humid air inlet and outlet. The humid air in the battery cabinet of the energy storage power station is sucked in by the fan, dried by the evaporator of the dehumidification module, and then the dry air is returned to the battery cabinet of the energy storage power station.

[0024] The utility model arranges the dehumidification module on the liquid cooling system unit in a series or parallel manner, so that the humid air passes through the dehumidification module of the liquid cooling system unit for drying, has a simple structure, saves energy consumption, and effectively improves the air drying degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a system schematic diagram of the utility model in series mode;

[0026] Figure 2 This is a system schematic diagram of the utility model in parallel mode;

[0027] Figure 3 This is a schematic diagram of the air duct formed by the liquid cooling system box and the battery cabinet of the energy storage power station to isolate the air from the outside. DETAILED DESCRIPTION Example 1

[0028] Series working mode, such as Figure 1 、 3 As shown:

[0029] During operation, the refrigerant is compressed by the compressor 6 and then enters the condenser 1 for cooling. The cooled refrigerant is throttled by EXV3 and then enters the evaporator 5 and chiller 4 for heat exchange (wherein the refrigerant exchanges heat with the high-temperature coolant flowing out of the battery cabinet 9 in the chiller 4 and exchanges heat with the wet air discharged from the battery cabinet in the evaporator 5). The refrigerant that absorbs heat continues to return to the compressor 6 and is pressurized to form a cycle.

[0030] The coolant in the battery cabinet 9 is connected from its liquid outlet to chiller 4 for cooling and then returns to the liquid inlet of the battery cabinet 9, thereby realizing the cooling process of the battery cabinet 9 of the energy storage power station.

[0031] The wet air pipeline, the air outlet of the battery cabinet 9 of the energy storage power station is connected to the dehumidification module (i.e., the evaporator 5 and the fan 7. The fan 7 is set in the dehumidification module. On the one hand, it blows air to the evaporator 5 to achieve a dehumidification effect. On the other hand, it forces the air in the dehumidification pipeline to flow in a certain direction) for cooling and dehumidification.

[0032] In this embodiment, the dehumidification module is connected in series with the liquid cooling system, which has the following advantages:

[0033] 1. Simplicity: The series design has a simple structure, saving an expansion valve. The arrangement order of each structural unit is clear and easy to install;

[0034] 2. Reliability: During the operation of the equipment, the series connection method is easy to maintain and troubleshoot. Example 2

[0035] Parallel working mode: refer to Figure 2 、 3 As shown:

[0036] During operation, the refrigerant is compressed by the compressor 6 and then enters the condenser 1 for cooling. The cooled refrigerant is then split into two paths: one path passes through the EXV 3 and then through the chiller 4 to exchange heat with the coolant flowing out of the battery cabinet 9; the other path passes through the S-TXV 10 and enters the dehumidification module evaporator 5 to exchange heat with the humid air coming from the battery cabinet 9 of the energy storage power station.

[0037] The high-temperature and high-humidity air coming out of the battery cabinet 9 is cooled by the evaporator of the dehumidification module, and then dried by the fan (dehumidified) and sent back to the battery cabinet 9.

[0038] In this embodiment, the dehumidification module is connected in parallel to the liquid cooling system, which has the following advantages:

[0039] 1. Adjustability: The parallel structure design enables separate adjustment of dehumidification and temperature control, which facilitates system debugging and is conducive to precise control of temperature and humidity.

[0040] 2. Safety: Since the dehumidification module operates independently and has an independent refrigerant system, it will not affect the operation of the liquid cooling system, and the overall safety is better.

[0041] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A liquid cooling system for an energy storage power station with a dehumidification function in series mode, characterized in that: The refrigerant pipeline comprises a condenser (1), an EXV (3), an evaporator (5), a chiller (4), and a compressor (6) which are connected in sequence to form a loop, and also comprises a fan (2) arranged near the condenser (1) and a fan (7) arranged near the evaporator (5); A coolant pipeline, comprising a water pump (10), a chiller (4), and a battery cabinet (9) which are connected in sequence to form a loop; A dehumidification pipeline, comprising a battery cabinet (9) and an evaporator (5); The chiller (4) includes a refrigerant pipeline connection port, which is respectively connected to the refrigerant pipeline connection ports of the compressor (6) and the evaporator (5); the chiller (4) also includes a coolant pipeline connection port, which is respectively connected to the coolant pipeline connection ports of the water pump (10) and the battery cabinet (9); The evaporator (5) includes a refrigerant pipeline connection port, which is respectively connected to the refrigerant pipeline connection ports of the chiller (4) and the EXV (3); the evaporator (5) also includes a dehumidification pipeline inlet and outlet, which is connected to the dehumidification pipeline inlet and outlet of the battery cabinet (9); The battery cabinet (9) includes a coolant pipeline connection port, which is respectively connected to the coolant pipeline connection ports of the water pump (10) and the chiller (4).

2. A liquid cooling system for an energy storage power station with a dehumidification function in series mode as claimed in claim 1, characterized in that: The coolant pipeline also includes a PCT (8) connected between the chiller (4) and the battery cabinet (9).

3. A liquid cooling system for energy storage power stations with dehumidification function in parallel mode, characterized in that: Based on a liquid cooling system for an energy storage power station with a dehumidification function in a series mode as claimed in claim 1, the refrigerant pipeline is divided into two branches: the first refrigerant branch is composed of a condenser (1), an EXV (3), a chiller (4), and a compressor (6) which are connected in sequence to form a loop, and also includes a fan (2) arranged near the condenser (1); The second refrigerant branch is composed of a condenser (1), an S-TXV (10), an evaporator (5), and a compressor (6) which are connected in sequence to form a loop, and also includes a fan (7) arranged near the evaporator (5); The chiller (4) includes a refrigerant pipeline connection port, which is respectively connected to the refrigerant pipeline connection ports of the compressor (6) and the EXV (3); The evaporator (5) comprises a refrigerant pipeline connection port, which is respectively connected to the refrigerant pipeline connection ports of the compressor (6) and the S-TXV (10).

4. A liquid cooling system for energy storage power stations with a dehumidification function in parallel mode as claimed in claim 3, characterized in that: The coolant pipeline also includes a PCT (8) connected between the chiller (4) and the battery cabinet (9).

5. A liquid cooling system for an energy storage power station with a dehumidification function according to any one of claims 1 to 4, characterized in that: A plurality of battery packs are arranged at intervals in the battery cabinet (9), and the battery packs are arranged at intervals to form gaps, and the gaps constitute air ducts. The bottom of the battery cabinet (9) is provided with air inlets / outlets, and dehumidification pipelines are connected to the air inlets / outlets to form dehumidification air outlets and dehumidification air inlets.

6. A liquid cooling system for an energy storage power station with a dehumidification function according to any one of claims 1, 2, 3, and 4, characterized in that: The liquid outlet of the battery cabinet (9) and the liquid inlet of the compressor (6) are both provided with PT sensors.

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