Energy storage converter

Abstract

The invention relates to the technical field of energy storage electronic equipment, and discloses an energy storage converter, which comprises a first shell, a connecting circuit board, a first radiator, a first fan assembly and a liquid cooling unit, a first radiator is arranged in the first shell, the first radiator comprises a built-in flow channel and radiating fins which are distributed up and down, the internal flow channel is communicated with the liquid cooling unit, the first fan assembly and the radiating fins are oppositely arranged, and the first shell is divided into a first cavity and a second cavity through a connecting circuit board; the built-in flow channel is filled with heat exchange fluid through the liquid cooling unit, and the first fan assembly blows heat dissipation fins, so that the air temperature in the internal flow channel is balanced, heat dissipation or heating of parts in the first cavity and the second cavity is realized, the converter can operate in an extremely hot or extremely cold environment, and the service life of the converter is prolonged. Therefore, the stability and reliability of the energy storage converter are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage electronic equipment, and in particular to an energy storage converter. Background Art

[0002] As an important component of the energy storage system, the core function of the energy storage inverter is to efficiently and stably convert the electrical energy in the energy storage device into output electrical energy that meets the demand. However, the energy storage inverter generates a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, it may lead to a decline in equipment performance, shortened service life, and even safety hazards.

[0003] In the prior art, the cooling of energy storage inverters mainly adopts air cooling solutions, which remove the heat generated by the equipment during operation through forced ventilation. However, the cooling capacity of traditional air cooling solutions is limited, and when the energy storage inverter is in extremely cold conditions, it is difficult to start components such as motors, resulting in unstable operation. Summary of the invention

[0004] In view of this, the present invention provides an energy storage inverter to solve the problem that the energy storage inverter in the prior art has poor adaptability in extreme environments, is easily damaged due to poor heat dissipation, or fails to start normally due to the environment being too cold.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] The present invention provides an energy storage inverter, comprising: a first shell, a connecting circuit board, a first radiator, a first fan assembly and a liquid cooling unit; the first shell is provided with a closed chamber; the connecting circuit board is horizontally mounted in the first shell, so as to be suitable for dividing the closed chamber into a first cavity and a second cavity; the first radiator is arranged in the second cavity, the first radiator comprises a built-in flow channel and heat dissipation fins which are arranged in an upper and lower manner, the built-in flow channel is located above and close to the connecting circuit board, and the heat dissipation fin is located below the built-in flow channel; the first fan assembly is arranged in the first cavity, and is arranged opposite to the heat dissipation fins, the first cavity and the second cavity are connected to form an internal flow channel, the first fan assembly blows air toward the heat dissipation fins to be suitable for dissipating heat or heating the internal flow channel; the liquid cooling unit is connected to the built-in flow channel, so as to be suitable for filling the built-in flow channel with heat exchange fluid.

[0007] It has the following advantages:

[0008] A first radiator is arranged in the first shell, and the first radiator includes a built-in flow channel and heat dissipation fins which are distributed up and down. The internal flow channel is connected to the liquid cooling unit, and the first fan assembly is arranged opposite to the heat dissipation fins. The first shell is divided into a first cavity and a second cavity by connecting the circuit board. The liquid cooling unit is used to inject heat exchange fluid into the built-in flow channel, and the first fan assembly blows toward the heat dissipation fins, so that the temperature in the internal flow channel is balanced, and heat dissipation or heating of the components in the first cavity and the second cavity is achieved, ensuring that the inverter can operate in extremely hot or extremely cold environments, thereby improving the stability and reliability of the energy storage inverter.

[0009] According to some embodiments of the present invention, the energy storage converter further includes an inverter module disposed in the first cavity, and the inverter module and the first heat sink are disposed correspondingly up and down.

[0010] According to some embodiments of the present invention, the liquid cooling unit includes a second shell, the first shell is fixed above the second shell, the bottom of the first shell is open, and the upper end surfaces of the first shell and the second shell enclose each other to form the closed chamber.

[0011] According to some embodiments of the present invention, a liquid injection port and a liquid discharge port are provided on the side wall of the second shell, and the liquid cooling unit includes a power module, a first drive pump and a heat exchanger all arranged in the second shell; a heat exchange flow channel is provided outside the power module;

[0012] The injection port is communicated with the water inlet end of the first driving pump, the water outlet end of the first driving pump is communicated with the first port of the heat exchanger, the second port of the heat exchanger is communicated with one end of the heat exchange channel, and the other end of the heat exchange channel is communicated with the discharge port;

[0013] The heat exchange fluid enters from the injection port, and under the drive of the first drive pump, flows through the heat exchanger, enters the heat exchange channel after heat exchange, and flows out from the discharge port after heat exchange with the power module.

[0014] According to some embodiments of the present invention, the liquid cooling unit also includes a refrigerant module arranged in the second shell, the refrigerant module includes a compressor, a condenser and an expansion valve connected in sequence, the inlet end of the compressor is connected to the third port of the heat exchanger, the outlet end of the expansion valve is connected to the fourth port of the heat exchanger, the refrigerant circulates in the refrigerant module, and the heat exchange fluid and the refrigerant realize heat exchange in the heat exchanger.

[0015] According to some embodiments of the present invention, the liquid cooling unit further comprises a second driving pump, a second radiator and an external pipe assembly arranged in the second housing; the water inlet end of the second driving pump is communicated with the liquid injection port and the second port of the heat exchanger through a three-way valve, and the outlet end of the second driving pump is communicated with the inlet end of the second radiator;

[0016] The external pipe assembly includes a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the outlet of the second radiator, and the other end of the water inlet pipe is connected to the water inlet of the first radiator; one end of the water outlet pipe is connected to the water outlet of the first radiator, and the other end of the water outlet pipe is connected to the drain port;

[0017] Driven by the second driving pump, the heat exchange fluid flows in the first radiator and the second radiator to achieve heat exchange.

[0018] According to some embodiments of the present invention, the liquid cooling unit further includes a second fan assembly, the second fan assembly is arranged opposite to the second radiator, and the second fan assembly is suitable for blowing air toward the second radiator.

[0019] According to some embodiments of the present invention, the three-way valve is an electric proportional valve.

[0020] According to some embodiments of the present invention, the liquid cooling unit further includes a heating module disposed in the second shell, wherein the heating module is disposed on a pipeline between the heat exchanger and the power module, and the heating module is suitable for heating the heat exchange fluid.

[0021] According to some embodiments of the present invention, the output power of the first driving pump is greater than the output power of the second driving pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of an energy storage converter according to some embodiments of the present invention;

[0024] Figure 2 An axial view of a liquid cooling unit according to some embodiments of the present invention;

[0025] Figure 3 A top view of a liquid cooling unit according to some embodiments of the present invention;

[0026] Figure 4 Schematic diagram of the internal structure of an energy storage converter according to some embodiments of the present invention

[0027] Figure 5 A cross-sectional view of an energy storage converter according to some embodiments of the present invention.

[0028] Description of reference numerals:

[0029] 1. First shell; 11. First cavity; 12. Second cavity; 2. Liquid cooling unit; 21. Second shell; 211. Liquid filling port; 212. Liquid discharge port; 22. First drive pump; 23. Second drive pump; 24. Power module; 25. Heat exchanger; 26. Second radiator; 27. Refrigerant module; 28. Second fan assembly; 29. ​​External pipe assembly; 3. Connecting circuit board; 4. First radiator; 5. First fan assembly; 6. Inverter module. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Reference Figures 1 to 5 As shown, the present invention provides an energy storage converter, including: a first shell 1, a connecting circuit board 3, a first radiator 4, a first fan assembly 5 and a liquid cooling unit 2; the first shell 1 is provided with a closed chamber; the connecting circuit board 3 is horizontally mounted in the first shell 1, so as to be suitable for dividing the closed chamber into a first cavity 11 and a second cavity 12; the first radiator 4 is arranged in the second cavity 12, and the first radiator 4 includes a built-in flow channel and heat dissipation fins arranged in an upper and lower manner, the built-in flow channel is located at the upper part and is arranged close to the connecting circuit board 3, and the heat dissipation is located below the built-in flow channel; the first fan assembly 5 is arranged in the first cavity 11, and is arranged opposite to the heat dissipation fins, the first cavity 11 and the second cavity 12 are connected to form an internal flow channel, and the first fan assembly 5 blows air toward the heat dissipation fins to be suitable for dissipating heat or heating the internal flow channel; the liquid cooling unit 2 is connected with the built-in flow channel, so as to be suitable for filling the built-in flow channel with heat exchange fluid.

[0035] Specifically, a first radiator 4 is arranged in the first shell 1, and the first radiator 4 includes a built-in flow channel and heat dissipation fins which are distributed up and down. The internal flow channel is connected to the liquid cooling unit 2, and the first fan assembly 5 is arranged opposite to the heat dissipation fins. The first shell 1 is divided into a first cavity 11 and a second cavity 12 by connecting the circuit board 3; the heat exchange fluid is poured into the built-in flow channel by the liquid cooling unit 2, and the first fan assembly 5 blows toward the heat dissipation fins, so that the temperature in the internal flow channel is balanced, and the components in the first cavity 11 and the second cavity 12 are cooled or heated, thereby ensuring that the inverter can operate in extremely hot or extremely cold environments, thereby improving the stability and reliability of the energy storage inverter.

[0036] It can be understood that a sealed chamber is formed in the first shell 1, and the connecting circuit board 3 is horizontally mounted in the first shell 1 to separate the sealed chamber into a first cavity 11 and a second cavity, and the first cavity 11 and the second cavity 12 are connected to form an internal flow channel.

[0037] The common heat flow recirculation in system air cooling will further reduce the cooling efficiency. In addition, the air cooling system is highly dependent on the air inlet and outlet, and may be affected by environmental factors in actual operation, such as dust accumulation or foreign objects blocking it.

[0038] In the present application, a closed chamber is formed in the first shell 1 to avoid dust accumulation. In order to prevent heat flow recirculation from further reducing the cooling efficiency, the liquid cooling unit 2 is connected to the built-in flow channel through the setting of the built-in flow channel, and the heat exchange fluid flows in the built-in flow channel to be suitable for heat exchange of the heat flow. The first fan assembly 5 is arranged relative to the heat exchange fins to blow air to the heat exchange fins.

[0039] When operating in a hot environment, the heat exchange fluid is at low temperature and low pressure when entering the built-in flow channel. After exchanging heat with the heat flow in the built-in flow channel, it takes away the heat, thereby reducing the temperature in the first shell 1; when operating in an extremely cold environment, in order to ensure the normal operation and startup of each module, a high-temperature and high-pressure heat exchange fluid is introduced into the built-in flow channel through the liquid cooling unit 2, thereby providing heat for the first shell 1, so as to ensure that the components in the first shell 1 operate at room temperature, thereby improving the reliability of operation.

[0040] In some embodiments of the present invention, the energy storage converter further includes an inverter module 6 disposed in the first cavity 11 , and the inverter module 6 and the first heat sink 4 are disposed correspondingly up and down.

[0041] Specifically, the first radiator 4 is disposed in the second cavity 12, and the inverter module 6 is disposed in the first cavity 11. By connecting the circuit board 3, the closed chamber is separated into the first cavity 11 and the second cavity 12, thereby extending the internal flow channel, and by connecting the circuit board 3, the complexity of the line connection is reduced, so that the energy storage converter has a simple structure and is easy to maintain. The inverter module 6 and the first radiator 4 are arranged correspondingly up and down, so that the temperature of the inverter module 6 is transferred to the first radiator 4, and the temperature of the inverter module 6 can be quickly reduced.

[0042] In some embodiments of the present invention, the liquid cooling unit 2 includes a second shell 21, the first shell 1 is fixedly arranged above the second shell 21, the bottom of the first shell 1 is open, and the upper end surfaces of the first shell 1 and the second shell 21 are enclosed to form a closed chamber.

[0043] The upper end surfaces of the first shell 1 and the second shell 21 are enclosed to form a closed chamber, the second shell 21 is a ventilated chamber, and the bottom of the first shell 1 is open to facilitate the transfer of internal heat to the second shell 21 .

[0044] In some embodiments of the present invention, a liquid injection port 211 and a liquid discharge port 212 are provided on the side wall of the second housing 21, and the liquid cooling unit 2 includes a power module 24, a first drive pump 22 and a heat exchanger 25, all of which are arranged in the second housing 21; a heat exchange flow channel is provided outside the power module 24;

[0045] The injection port 211 is connected to the water inlet of the first driving pump 22, the water outlet of the first driving pump 22 is connected to the first port of the heat exchanger 25, the second port of the heat exchanger 25 is connected to one end of the heat exchange channel, and the other end of the heat exchange channel is connected to the discharge port 212;

[0046] The heat exchange fluid enters from the injection port 211 , and under the drive of the first drive pump 22 , flows through the heat exchanger 25 , enters the heat exchange channel after heat exchange with the power module 24 , and flows out from the discharge port 212 .

[0047] Specifically, to ensure the operation of the liquid cooling assembly in an extremely cold environment, the power module 24 provides power for the first drive pump 22 and components such as the controller. To avoid the battery in the power module 24 being consumed too quickly due to the temperature being too low and unable to provide power supply, it is necessary to ensure that the temperature of the power module 24 is maintained at the operating temperature in an extremely cold environment. The heat preservation of the power module 24 is achieved through the circulation of the heat exchange fluid, so that the power module 24 operates at the operating temperature and the efficiency of the power module 24 startup is accelerated. Under normal temperature conditions, when the liquid cooling unit 2 has been running for a long time, the power module 24 will heat up. To avoid the power module 24 being too high and a fever alarm appearing, the heat of the power module 24 is taken away through the circulation of the heat exchange fluid, thereby achieving the cooling of the power module 24.

[0048] In some embodiments of the present invention, the liquid cooling unit 2 also includes a refrigerant module 27 arranged in the second shell 21, and the refrigerant module 27 includes a compressor, a condenser and an expansion valve connected in sequence, the inlet end of the compressor is connected to the third port of the heat exchanger 25, and the outlet end of the expansion valve is connected to the fourth port of the heat exchanger 25. The refrigerant circulates in the refrigerant module 27, and the heat exchange fluid and the refrigerant realize heat exchange in the heat exchanger 25.

[0049] Specifically, by circulating the refrigerant in the refrigerant module 27, heat exchange is achieved between the heat exchange fluid and the refrigerant in the heat exchanger 25. By controlling the circulation direction of the refrigerant in the refrigerant module 27, the heat exchange fluid is cooled or heated, so that the energy storage heat exchanger 25 can adapt to a variety of working environments.

[0050] Specifically, when in a hot environment, the heat exchange fluid needs to dissipate heat, and the refrigerant flows out of the compressor, passes through the condenser and the expansion valve, and enters the heat exchanger 25 to absorb the heat of the heat exchange fluid, thereby reducing the temperature of the heat exchange fluid; when in a cold environment, the heat exchange fluid needs to absorb heat, and the high-temperature and high-pressure refrigerant flows out of the compressor directly into the heat exchanger 25 to release heat, thereby increasing the temperature of the heat exchange fluid.

[0051] In some embodiments of the present invention, the liquid cooling unit 2 further includes a second driving pump 23, a second radiator 26 and an external pipe assembly 29 disposed in the second housing 21; the water inlet end of the second driving pump 23 is connected to the liquid injection port 211 and the second port of the heat exchanger 25 through a three-way valve, and the outlet end of the second driving pump 23 is connected to the inlet end of the second radiator 26;

[0052] The external pipe assembly 29 includes a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the outlet of the second radiator 26, and the other end of the water inlet pipe is connected to the water inlet of the first radiator 4; one end of the water outlet pipe is connected to the water outlet of the first radiator 4, and the other end of the water outlet pipe is connected to the drain port 212;

[0053] Driven by the second driving pump 23 , the heat exchange fluid flows in the first radiator 4 and the second radiator 26 to achieve heat exchange.

[0054] Specifically, the external tube group realizes the communication between the liquid cooling tube group and the built-in flow channel, so that the heat exchange fluid can flow through the built-in flow channel of the second radiator 26. The second driving pump 23 is connected with the injection port 211 and the second port of the heat exchanger 25 through the three-way valve, so that the heat exchange fluid after heat exchange in the heat exchanger 25 can flow to the built-in flow channel of the second radiator 26 in the driving direction of the second driving pump 23, so as to realize heat dissipation or heating of the second radiator 26.

[0055] In some embodiments of the present invention, the liquid cooling unit 2 further includes a second fan assembly 28 , which is disposed opposite to the second radiator 26 , and is suitable for blowing air toward the second radiator 26 .

[0056] Specifically, the second fan assembly 28 blows air to the second radiator 26 to achieve heat exchange between the heat exchange fluid and the outside. Hollow holes are provided on opposite sides of the second shell 21 to achieve gas circulation inside the second shell 21.

[0057] In some embodiments of the present invention, the three-way valve is an electric proportional valve.

[0058] By controlling the opening of the three-way valve, the opening between the heat exchanger 25 and the second drive pump 23 is controlled to regulate the flow of the heat exchange fluid between the heat exchanger 25 and the second drive pump 23. When the temperature inside the first shell 1 is high, the opening between the second port of the heat exchanger 25 and the second drive pump 23 can be increased to ensure that a sufficient amount of cooled heat exchange fluid enters the built-in channel of the second radiator 26 to achieve heat exchange for the first shell 1.

[0059] In some embodiments of the present invention, the liquid cooling unit 2 further includes a heating module disposed in the second shell 21 . The heating module is disposed on a pipeline between the heat exchanger 25 and the power module 24 . The heating module is suitable for heating the heat exchange fluid.

[0060] Specifically, when the controller controls the heating mode to cool, the first drive pump 22 is started, a temperature threshold is preset in the controller, and a temperature sensor is provided at the outlet of the power module 24. The temperature sensor is suitable for detecting the outlet water temperature and feeding back to the controller. The controller compares the outlet water temperature with the temperature threshold. When the inlet water temperature is lower than the temperature threshold, the controller controls the heating module to operate to heat the heat exchange fluid, thereby achieving heating and insulation of the power module 24 to ensure that the power module 24 operates at the working temperature. When the temperature sensor detects that the outlet water temperature is higher than the temperature threshold, the controller controls the heating module to stop operating, and an alarm for excessive temperature is sounded.

[0061] In some embodiments of the present invention, the output power of the first driving pump 22 is greater than the output power of the second driving pump 23 .

[0062] Specifically, to ensure heat exchange for the power module 24, the output power of the first drive pump 22 needs to be greater than the output power of the second drive pump 23. Specifically, the output power of the first drive pump 22 is 240kw, and the output power of the second drive pump 23 is 120kw.

[0063] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. An energy storage converter, characterized in that: include: A first shell (1) is provided with a sealed chamber; A connecting circuit board (3) is horizontally mounted in the first housing (1) so as to be suitable for dividing the closed chamber into a first cavity (11) and a second cavity (12); A first heat sink (4) is disposed in the second cavity (12), the first heat sink (4) comprising a built-in flow channel and heat dissipation fins which are arranged in an upper and lower manner, the built-in flow channel being located at the upper part and being arranged close to the connecting circuit board (3), and the heat dissipation fin being located below the built-in flow channel; A first fan assembly (5) is disposed in the first cavity (11) and is arranged opposite to the heat dissipation fins, the first cavity (11) and the second cavity (12) are connected to form an internal flow channel, and the first fan assembly (5) blows air toward the heat dissipation fins to dissipate heat or heat the internal flow channel; The liquid cooling unit (2) is in communication with the built-in flow channel so as to be suitable for injecting heat exchange fluid into the built-in flow channel.

2. The energy storage converter according to claim 1, characterized in that: It also includes an inverter module (6) arranged in the first cavity (11), and the inverter module (6) and the first heat sink (4) are arranged correspondingly up and down.

3. The energy storage converter according to claim 1, characterized in that: The liquid cooling unit (2) comprises a second shell (21), the first shell (1) is fixedly arranged above the second shell (21), the bottom of the first shell (1) is open, and the upper end surfaces of the first shell (1) and the second shell (21) are enclosed to form the closed chamber.

4. The energy storage converter according to claim 3, characterized in that: A liquid injection port (211) and a liquid discharge port (212) are provided on the side wall of the second shell (21). The liquid cooling unit (2) comprises a power module (24), a first drive pump (22) and a heat exchanger (25) all arranged in the second shell (21); a heat exchange channel is provided outside the power module (24). The injection port (211) is in communication with the water inlet end of the first driving pump (22), the water outlet end of the first driving pump (22) is in communication with the first port of the heat exchanger (25), the second port of the heat exchanger (25) is in communication with one end of the heat exchange channel, and the other end of the heat exchange channel is in communication with the liquid discharge port (212); The heat exchange fluid enters from the injection port (211), and under the drive of the first drive pump (22), flows through the heat exchanger (25), and after heat exchange, enters the heat exchange channel, exchanges heat with the power module (24), and then flows out from the discharge port (212).

5. The energy storage converter according to claim 4, characterized in that: The liquid cooling unit (2) also includes a refrigerant module (27) arranged in the second shell (21), and the refrigerant module (27) includes a compressor, a condenser and an expansion valve connected in sequence, the inlet end of the compressor is connected to the third port of the heat exchanger (25), and the outlet end of the expansion valve is connected to the fourth port of the heat exchanger (25). The refrigerant circulates in the refrigerant module (27), and the heat exchange fluid and the refrigerant realize heat exchange in the heat exchanger (25).

6. The energy storage converter according to claim 5, characterized in that: The liquid cooling unit (2) further comprises a second driving pump (23), a second radiator (26) and an external pipe assembly (29) arranged in the second housing (21); the water inlet end of the second driving pump (23) is communicated with the liquid injection port (211) and the second port of the heat exchanger (25) through a three-way valve, and the outlet end of the second driving pump (23) is communicated with the inlet end of the second radiator (26); The external pipe assembly (29) comprises a water inlet pipe and a water outlet pipe, one end of the water inlet pipe is connected to the outlet of the second radiator (26), and the other end of the water inlet pipe is connected to the water inlet of the first radiator (4); one end of the water outlet pipe is connected to the water outlet of the first radiator (4), and the other end of the water outlet pipe is connected to the drain port (212); Driven by the second driving pump (23), the heat exchange fluid flows in the first radiator (4) and the second radiator (26) to achieve heat exchange.

7. The energy storage converter according to claim 6, characterized in that: The liquid cooling unit (2) further comprises a second fan assembly (28), wherein the second fan assembly (28) is arranged opposite to the second radiator (26), and the second fan assembly (28) is suitable for blowing air toward the second radiator (26).

8. The energy storage converter according to claim 6, characterized in that: The three-way valve is an electric proportional valve.

9. The energy storage converter according to claim 7, characterized in that: The liquid cooling unit (2) further comprises a heating module arranged in the second shell (21), wherein the heating module is arranged on a pipeline between the heat exchanger (25) and the power module (24), and the heating module is suitable for heating the heat exchange fluid.

10. The energy storage converter according to claim 6, characterized in that: The output power of the first driving pump (22) is greater than the output power of the second driving pump (23).

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