Fluorine pump heat dissipation system of energy storage converter

Abstract

The utility model discloses a fluorine pump heat dissipation system of an energy storage converter, which comprises an IGBT liquid cooling plate, a condenser, a fluorine pump and a liquid storage tank, a liquid inlet of the IGBT liquid cooling plate is connected with a liquid outlet of the liquid storage tank through a pipeline, a liquid outlet of the IGBT liquid cooling plate is communicated with a liquid inlet of the condenser through a pipeline, and a liquid outlet of the condenser is communicated with a liquid outlet of the liquid storage tank through a pipeline. The IGBT liquid cooling plate is used for performing convective heat exchange on a refrigerant in the heat dissipation system and an IGBT device in the IGBT liquid cooling plate; a liquid outlet of the condenser is connected with a liquid inlet end of the fluorine pump through a pipeline, and a liquid outlet end of the fluorine pump is communicated with a liquid inlet of the liquid storage tank; an expansion tank is arranged between the condenser and the fluorine pump and is used for carrying out pressure compensation on the heat dissipation system, so that damage to pipelines or equipment caused by temperature change in the system is avoided; wherein power is provided by the fluorine pump to drive a refrigerant to flow out of the liquid storage tank, sequentially flow through the IGBT liquid cooling plate and the condenser, and then flow back to the liquid storage tank through the fluorine pump to circularly cool the IGBT device.

Description

Technical Field

[0001] The utility model relates to power electronics technology and electrochemical energy storage technology, and in particular to a fluorine pump heat dissipation system for an energy storage converter. Background Art

[0002] In recent years, energy storage technology based on "battery + power electronics technology" has developed rapidly, and energy issues have received close international attention. In order to achieve carbon neutrality and solve the current energy supply problem, my country has also introduced many policies to strongly support the development of clean energy. With the rapid development of the wind power and photovoltaic industries, energy storage has largely solved the randomness and volatility of new energy power generation, playing the role of "filling the valley with the peak".

[0003] The performance of energy storage depends largely on the performance and stability of the inverter. IGBT (insulated gate bipolar transistor) is the key switching device of the energy storage inverter. As the capacity of IGBT devices continues to increase, higher requirements are placed on the heat dissipation of the radiator.

[0004] The traditional IGBT heat dissipation is not very good, causing the chip temperature to rise to exceed the maximum allowed IGBT junction temperature, resulting in device performance deterioration or failure. At the same time, the existing air-cooled heat dissipation structure has low heat exchange efficiency, low system energy conversion efficiency, and high noise.

[0005] Therefore, it is necessary to provide a fluorine pump heat dissipation system for an energy storage inverter to solve the problems mentioned in the above background technology. Utility Model Content

[0006] To achieve the above purpose, the utility model provides the following technical solution: a fluorine pump heat dissipation system for an energy storage converter, comprising: an IGBT liquid cooling plate, a condenser, a fluorine pump and a liquid storage tank.

[0007] The liquid inlet of the IGBT liquid cooling plate is connected to the liquid outlet of the liquid storage tank through a pipeline, and the liquid outlet of the IGBT liquid cooling plate is connected to the liquid inlet of the condenser through a pipeline. The liquid storage tank contains refrigerant, and the IGBT liquid cooling plate is used to perform convection heat exchange between the refrigerant in the heat dissipation system and the IGBT device inside it;

[0008] The liquid outlet of the condenser is connected to the liquid inlet of the fluorine pump through a pipeline, and the liquid outlet of the fluorine pump is connected to the liquid inlet of the liquid storage tank;

[0009] An expansion tank is provided between the condenser and the fluorine pump, and the expansion tank is used for pressure compensation of the heat dissipation system;

[0010] The fluorine pump provides power to drive the refrigerant to flow out of the liquid storage tank, flow through the IGBT liquid cooling plate and the condenser in sequence, and then flow back to the liquid storage tank through the fluorine pump to circulate and cool the IGBT device.

[0011] As a preferred technical solution of the utility model, the refrigerant is liquid Freon.

[0012] As a preferred technical solution of the utility model, a first branch pipeline is also connected in parallel to the pipeline between the condenser and the liquid storage tank, and the two ends of the first branch pipeline are respectively connected to the liquid inlet and liquid outlet pipelines of the fluorine pump, and an electric valve is installed on the first branch pipeline. The electric valve and the liquid storage tank, IGBT liquid cooling plate, condenser and pipeline together constitute a gravity heat pipe system.

[0013] As a preferred technical solution of the utility model, a temperature sensor is provided on the pipeline between the fluorine pump and the front part of the expansion tank for collecting the temperature of the refrigerant in the pipeline.

[0014] As a preferred technical solution of the utility model, a pressure sensor is provided on the pipeline between the fluorine pump and the front part of the expansion tank for collecting the refrigerant pressure in the pipeline.

[0015] As a preferred technical solution of the utility model, the fluorine pump is a magnetic pump.

[0016] As a preferred technical solution of the present utility model, the condenser is a parallel flow heat exchanger.

[0017] Compared with the prior art, the utility model provides a fluorine pump heat dissipation system for an energy storage converter, which has the following beneficial effects:

[0018] In the utility model, by arranging an expansion tank, a fluorine pump, an electric valve and other structures in the heat dissipation system of the energy storage inverter, the heat dissipation system can be switched between the gravity heat pipe system and the fluorine pump heat dissipation system, and a suitable system is selected for heat dissipation according to the heat generation of the IGBT device, thereby improving the system energy conversion efficiency, reducing the system noise, and avoiding the influence of excessive temperature on the performance of the IGBT device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a fluorine pump cooling system for an energy storage converter;

[0020] In the figure: 1. Liquid cooling plate; 2. Liquid storage tank; 3. Condenser; 4. Fluorine pump; 5. Expansion tank; 6. Electric valve; 7. Temperature sensor; 8. Pressure sensor. DETAILED DESCRIPTION

[0021] See also Figure 1The utility model provides a fluorine pump heat dissipation system for an energy storage converter, comprising:

[0022] IGBT liquid cooling plate 1, condenser 3, fluorine pump 4 and liquid storage tank 2, the liquid inlet of the IGBT liquid cooling plate 1 is connected to the liquid outlet of the liquid storage tank 2 through a pipeline, the liquid outlet of the IGBT liquid cooling plate 1 is connected to the liquid inlet of the condenser 3 through a pipeline, the liquid storage tank 2 contains refrigerant, and the IGBT liquid cooling plate 1 is used to perform convection heat exchange between the refrigerant in the heat dissipation system and the IGBT device inside it;

[0023] The liquid outlet of the condenser 3 is connected to the liquid inlet of the fluorine pump 4 through a pipeline, and the liquid outlet of the fluorine pump 4 is connected to the liquid inlet of the liquid storage tank 2;

[0024] An expansion tank 5 is provided between the condenser 3 and the fluorine pump 4, and the expansion tank 5 is used for pressure compensation of the heat dissipation system;

[0025] The fluorine pump 4 provides power to drive the refrigerant to flow out of the liquid storage tank 2, flow through the IGBT liquid cooling plate 1 and the condenser 3 in sequence, and then flow back to the liquid storage tank 2 through the fluorine pump 4 to circulate and cool the IGBT device.

[0026] It should be explained that the condenser 3 adopts natural heat dissipation. When the pressure in the heat dissipation system is too high due to temperature changes, the expansion tank 5 absorbs excess pressure to avoid damage to pipes or equipment. When the pressure in the heat dissipation system is too low due to temperature changes, the expansion tank 5 will actively release the stored pressure to ensure the normal operation of the heat dissipation system and avoid deterioration or failure of the IGBT device performance.

[0027] In this embodiment, the refrigerant is liquid Freon.

[0028] It should be explained that when the junction temperature (actual operating temperature) of the energy storage converter IGBT is high, the fluorine pump cooling system is started, the electric valve 6 is closed, and the fluorine pump 4 is turned on. At this time, due to the large heat dissipation of the IGBT device, it is necessary to increase the refrigerant flow entering the IGBT liquid cooling plate 1. The liquid freon in the liquid storage tank 2 enters the IGBT liquid cooling plate 1 and performs convection heat exchange with the IGBT device. The liquid freon after absorbing heat is converted into gas. The high-temperature and high-pressure freon gas passes through the condenser 3, and the temperature is reduced, while the pressure remains unchanged. The gaseous freon is converted into liquid, which is powered by the fluorine pump 4 and flows back to the liquid storage tank 2 under the action of the fluorine pump 4 to circulate and cool the IGBT device. The fluorine pump cooling system can meet the high energy conversion efficiency of the system and no noise when the heat dissipation of the IGBT is large.

[0029] In this embodiment, a first branch pipeline is also connected in parallel to the pipeline between the condenser 3 and the liquid storage tank 2, and the two ends of the first branch pipeline are respectively connected to the liquid inlet and liquid outlet pipelines of the fluorine pump 4. An electric valve 6 is installed on the first branch pipeline. The electric valve 6 and the liquid storage tank 2, the IGBT liquid cooling plate 1, the condenser 3 and the pipeline together constitute a gravity heat pipe system.

[0030] In this embodiment, a temperature sensor 7 is provided on the pipeline between the fluorine pump 4 and the front part of the expansion tank 5 to collect the temperature of the refrigerant in the pipeline.

[0031] In this embodiment, a pressure sensor 8 is provided on the pipeline between the fluorine pump 4 and the front part of the expansion tank 5 to collect the refrigerant pressure in the pipeline.

[0032] When the energy storage converter starts to work and the junction temperature of the IGBT device is low, the electric valve 6 in the heat dissipation system is opened and the fluorine pump 4 is closed. At this time, only the gravity heat pipe system is needed to meet the heat dissipation requirements. The gravity heat pipe system only has the power consumption of the electric valve 6 and the temperature and pressure sensor 8. The system power is almost zero, the system energy conversion efficiency is high, and there is no noise.

[0033] Specifically, the liquid Freon in the liquid storage tank 2 enters the IGBT liquid cooling plate 1 to carry out convection heat exchange with the IGBT device. The liquid Freon after absorbing heat is converted into gas. The temperature of the high-temperature and high-pressure Freon gas decreases after passing through the condenser 3, while the pressure remains unchanged. The gaseous Freon is converted into liquid. Relying on the action of gravity, the liquid Freon flows back into the liquid storage tank 2 through the electric valve 6 to circulate and cool the IGBT device to dissipate heat.

[0034] In this embodiment, the fluorine pump 4 is a magnetic pump, which has no shaft seal, no leakage, and can withstand high and low temperature environments.

[0035] In this embodiment, the condenser 3 is a parallel flow heat exchanger. The parallel flow heat exchanger has the characteristics of high pressure resistance and high heat exchange efficiency, so as to quickly cool the gaseous Freon and convert it into liquid.

[0036] In specific implementation, when the energy storage inverter starts to work and the heat and power consumption of the IGBT device is low, the electric valve is opened, the fluorine pump is closed, and the gravity heat pipe system is used to dissipate heat from the IGBT device; when the heat and power consumption of the IGBT device of the energy storage inverter is high, the electric valve is closed, the fluorine pump is opened, and the fluorine pump system is used to cool and dissipate heat from the IGBT.

[0037] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fluorine pump heat dissipation system for an energy storage converter, characterized in that: include: An IGBT liquid cooling plate (1), a condenser (3), a fluorine pump (4) and a liquid storage tank (2), wherein the liquid inlet of the IGBT liquid cooling plate (1) is connected to the liquid outlet of the liquid storage tank (2) via a pipeline, the liquid outlet of the IGBT liquid cooling plate (1) is connected to the liquid inlet of the condenser (3) via a pipeline, the liquid storage tank (2) contains a refrigerant, and the IGBT liquid cooling plate (1) is used to perform convection heat exchange between the refrigerant in the heat dissipation system and the IGBT device inside the IGBT liquid cooling plate (1); The liquid outlet of the condenser (3) is connected to the liquid inlet of the fluorine pump (4) through a pipeline, and the liquid outlet of the fluorine pump (4) is connected to the liquid inlet of the liquid storage tank (2); An expansion tank (5) is provided between the condenser (3) and the fluorine pump (4), and the expansion tank (5) is used to perform pressure compensation on the heat dissipation system; The fluorine pump (4) provides power to drive the refrigerant to flow out of the liquid storage tank (2), flow through the IGBT liquid cooling plate (1) and the condenser (3) in sequence, and then flow back to the liquid storage tank (2) through the fluorine pump (4) to circulate and cool the IGBT device.

2. The fluorine pump heat dissipation system for an energy storage converter according to claim 1, characterized in that: The refrigerant is liquid Freon.

3. The fluorine pump heat dissipation system for an energy storage converter according to claim 1, characterized in that: A first branch pipeline is also connected in parallel to the pipeline between the condenser (3) and the liquid storage tank (2), and the two ends of the first branch pipeline are respectively connected to the liquid inlet and liquid outlet pipelines of the fluorine pump (4), and an electric valve (6) is installed on the first branch pipeline. The electric valve (6), the liquid storage tank (2), the IGBT liquid cooling plate (1), the condenser (3) and the pipeline together constitute a gravity heat pipe system.

4. The fluorine pump heat dissipation system for an energy storage converter according to claim 2, characterized in that: A temperature sensor (7) is provided on the pipeline between the fluorine pump (4) and the expansion tank (5) for collecting the temperature of the refrigerant in the pipeline.

5. The fluorine pump heat dissipation system for an energy storage converter according to claim 2, characterized in that: A pressure sensor (8) is provided on the pipeline between the fluorine pump (4) and the expansion tank (5) for collecting the refrigerant pressure in the pipeline.

6. The fluorine pump heat dissipation system for an energy storage converter according to claim 2, characterized in that: The fluorine pump (4) is a magnetic pump.

7. The fluorine pump heat dissipation system for an energy storage converter according to claim 1, characterized in that: The condenser (3) is a parallel flow heat exchanger.

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