Energy storage converter cabinet and power electronic equipment

Abstract

The invention relates to the technical field of power electronics, and provides an energy storage converter cabinet and power electronic equipment, and the energy storage converter cabinet comprises a cabinet body which defines an accommodation space; the heat source piece is arranged in the accommodating space; the gas-liquid heat exchanger is arranged outside the accommodating space and comprises a fan; the liquid cooling plate is arranged in the accommodating space, comprises a liquid inlet and a liquid outlet and is used for dissipating heat of the heat source piece; the liquid cooling heat dissipation pipeline comprises a liquid cooling main loop communicated with the liquid outlet and the first end of the three-way valve, a first liquid cooling loop communicated with the second end of the three-way valve and the liquid inlet and a second liquid cooling loop communicated with the third end of the three-way valve and the liquid inlet, and the second liquid cooling loop comprises a liquid inlet loop, an external loop and a liquid return loop which are communicated in sequence; the external loop is arranged in the gas-liquid heat exchanger; the control module is used for obtaining the temperature of the heat source piece and the rotating speed of the fan and sending control instructions to the three-way valve and the fan to adjust the opening degree of the three-way valve and / or the rotating speed of the fan, and noise and energy consumption can be reduced on the premise that heat dissipation is guaranteed.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage technology, and in particular to an energy storage converter cabinet and power electronic equipment. Background Technology

[0002] Energy storage converter cabinets generate a significant amount of heat during operation. This heat buildup can cause the equipment temperature to rise, affecting its normal operation and safety. Therefore, a cooling system is essential in energy storage converter cabinets. However, current cooling systems generate considerable noise, which negatively impacts the equipment's operating environment. Summary of the Invention

[0003] This disclosure provides an energy storage converter cabinet and power electronic equipment that can at least minimize noise and reduce the impact on the equipment's operating environment while ensuring heat dissipation.

[0004] According to some embodiments of this disclosure, one aspect of this disclosure provides an energy storage converter cabinet, including: a cabinet body enclosing a receiving space; a heat source component disposed in the receiving space; a gas-liquid heat exchanger disposed outside the receiving space, the gas-liquid heat exchanger including a fan; a liquid cooling plate disposed in the receiving space, the liquid cooling plate including a liquid inlet and a liquid outlet, the liquid cooling plate being used to dissipate heat from the heat source component; and a liquid cooling heat dissipation pipeline, including a liquid cooling main circuit, a first liquid cooling circuit, a second liquid cooling circuit, and a three-way valve, the three-way valve, the liquid cooling main circuit, and the first liquid cooling circuit being disposed in the receiving space; wherein, the two ends of the liquid cooling main circuit are respectively connected to the liquid outlet and the first end of the three-way valve, and the first liquid cooling circuit is connected to... A second liquid cooling circuit is connected between the second end of the three-way valve and the liquid inlet, and between the third end of the three-way valve and the liquid inlet. The second liquid cooling circuit includes a liquid inlet circuit, an external circuit, and a liquid return circuit connected in sequence. The liquid inlet circuit is disposed within the accommodating space and connected to the third end of the three-way valve. The external circuit is disposed within the gas-liquid heat exchanger. The liquid return circuit is disposed within the accommodating space and connected to the liquid inlet. A control module is electrically connected to the three-way valve and the fan, respectively. The control module is configured to acquire the temperature of the heat source component and the current speed of the fan, and send control commands to the three-way valve and the fan to adjust the opening degree of the three-way valve and / or the current speed of the fan.

[0005] In some embodiments, the control module includes: a temperature sensor disposed within the accommodating space for detecting the temperature of the heat source component; a speed acquisition unit for acquiring the current speed of the fan; and a control unit electrically connected to the temperature sensor, the speed acquisition unit, the three-way valve, and the fan, respectively. The control unit is configured to receive the temperature signal of the heat source component and the current speed signal of the fan, and to send control commands to the three-way valve and the fan to adjust the opening degree of the three-way valve and / or the current speed of the fan.

[0006] In some embodiments, the control module further includes: a calculation unit configured to obtain a target water temperature of the coolant in the energy storage converter cabinet based on the temperature of the heat source component and at least one of the power of the energy storage converter cabinet, the ambient temperature inside the cabinet, and the ambient humidity inside the cabinet; and to obtain the current speed of the fan based on the ambient temperature and the target water temperature; and to obtain the maximum value of the fan speed based on the rated maximum ambient temperature. The judgment unit is configured to obtain the current speed of the fan and compare the current speed with the maximum value; the control unit is further configured to send a control command to the three-way valve and the fan if the current speed is greater than or equal to the maximum value, so as to adjust the opening of the three-way valve, reduce the flow of coolant to the second liquid cooling circuit, and reduce the current speed of the fan until the current speed is less than the maximum value.

[0007] In some embodiments, the energy storage converter cabinet further includes: a water pump disposed in the liquid cooling main circuit and connected between the liquid inlet and the first end of the three-way valve; the control unit is further configured to: when a control command is sent to the three-way valve, simultaneously send a control command to the water pump to increase the speed of the water pump.

[0008] In some embodiments, when the current rotational speed is less than the maximum value, the determining unit is further configured to: compare the ambient temperature with a first preset ambient temperature; the control unit is further configured to: if the ambient temperature is less than the first preset ambient temperature, send a control command to the fan to reduce the current rotational speed of the fan.

[0009] In some embodiments, the determining unit is further configured to: compare the temperature of the heat source component with a preset temperature; the control unit is further configured to: if the temperature of the heat source component is less than the preset temperature, send a control command to the fan to control the current speed of the fan to be reduced according to a first preset speed reduction ratio.

[0010] In some embodiments, the determining unit is further configured to: compare the temperature of the heat source component with the preset temperature, and if the temperature of the heat source component is greater than or equal to the preset temperature, compare the difference between the liquid temperature at the inlet and the liquid temperature at the outlet of the gas-liquid heat exchanger with a preset temperature difference; the control unit is further configured to: if the temperature of the heat source component is greater than or equal to the preset temperature, and the difference between the liquid temperature at the inlet and the liquid temperature at the outlet of the gas-liquid heat exchanger is greater than the preset temperature difference, then send a control command to the fan to control the current speed of the fan to be reduced according to a second preset speed reduction ratio.

[0011] In some embodiments, the determining unit is further configured to: compare the ambient temperature with a second preset ambient temperature, wherein the second preset ambient temperature is less than the first preset ambient temperature; the control unit is further configured to: if the ambient temperature is less than the second preset ambient temperature, send a control command to the fan to reduce the current speed of the fan to a second speed, and send a control command to the three-way valve to adjust the opening of the three-way valve to shut off the second liquid cooling circuit.

[0012] In some embodiments, the fan has a rated speed, and the current speed is less than or equal to 50% of the rated speed.

[0013] In some embodiments, the cabinet includes a top and a bottom disposed opposite each other, and a side portion connecting the top and the bottom; the gas-liquid heat exchanger is disposed on the top; the gas-liquid heat exchanger includes a wind chamber through which the external circuit flows, and a fan is disposed in the wind chamber and faces the external circuit.

[0014] In some embodiments, the cabinet includes a top and a bottom disposed opposite to each other, and a side portion connecting the top and the bottom; the energy storage converter cabinet further includes: a first noise reduction unit disposed on the bottom side away from the top, for reducing the vibration generated by the energy storage converter cabinet during operation.

[0015] In some embodiments, the first noise reduction unit includes a plurality of shock absorbers, which are evenly distributed on the bottom side away from the top.

[0016] In some embodiments, the cross-sectional shape of the bottom is quadrilateral, and the first noise reduction unit includes four shock absorbers, with one shock absorber disposed at each of the four corners of the bottom.

[0017] In some embodiments, the energy storage converter cabinet further includes a second noise reduction unit, which is disposed on the side of the fan away from the cabinet.

[0018] In some embodiments, the liquid cooling plate is in contact with the heat source.

[0019] In some embodiments, the cabinet includes a top and a bottom disposed opposite each other, and a side portion connecting the top and the bottom; the top and the side portion include a protective layer, a sound-absorbing layer and a fire-resistant layer stacked together.

[0020] According to some embodiments of this disclosure, another aspect of this disclosure also provides a power electronic device, including an energy storage converter cabinet as described in any of the above claims.

[0021] The technical solution provided in this disclosure has at least the following advantages: The energy storage converter cabinet provided in this embodiment incorporates a liquid-cooled plate within its housing space. The plate's inlet and outlet are connected to a liquid-cooled heat dissipation pipeline. This allows the liquid-cooled plate to absorb heat generated during the operation of the heat source components and transfer this heat to the coolant flowing inside. The coolant circulates within the liquid-cooled heat dissipation pipeline to dissipate the heat. Furthermore, the liquid-cooled heat dissipation pipeline employs a composite pipeline structure, including a main liquid-cooled circuit, a three-way valve, a first liquid-cooled circuit, and a second liquid-cooled circuit. The first liquid-cooled circuit forms the circulation path of the coolant within the cabinet, while the second liquid-cooled circuit, via an external circuit, passes through a gas-liquid heat exchanger to form an external circulation path for the coolant. The gas-liquid heat exchanger is equipped with a fan to force air to exchange heat with the coolant within the heat exchanger, significantly improving its heat dissipation efficiency. The control module dynamically adjusts the opening of the three-way valve and / or the current fan speed based on the temperature of the heat source components and the current fan speed, thereby controlling the flow distribution ratio of the coolant between the first and second liquid-cooled circuits. When the heat load is low, the coolant flow rate of the first liquid cooling circuit is increased, while the flow rate through the gas-liquid heat exchanger is reduced, thereby lowering the current fan speed, effectively saving energy and reducing fan noise. When the heat load increases, the flow rate of the second liquid cooling circuit is increased to enhance the external circulation heat dissipation capacity and ensure that the temperature of the heat source components remains within a safe range. This design achieves synergistic optimization of heat dissipation performance, energy consumption, and noise, improving the adaptability and operational reliability of the energy storage converter cabinet under different operating conditions. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Unless otherwise stated, the pictures in the accompanying drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a structure of an energy storage converter cabinet provided in an embodiment of this disclosure; Figure 2 Another structural schematic diagram of the energy storage converter cabinet provided in the embodiments of this disclosure; Figure 3 A schematic diagram of the structure of a control module provided in an embodiment of this disclosure; Figure 4 Another schematic diagram of the control module provided in an embodiment of this disclosure; Figure 5 Another structural schematic diagram of the energy storage converter cabinet provided in the embodiments of this disclosure; Figure 6 A flowchart illustrating a control method for an energy storage converter cabinet provided in an embodiment of this disclosure; Figure 7 A flowchart illustrating another control method for an energy storage converter cabinet provided in this embodiment of the present disclosure; Figure 8 A flowchart illustrating another control method for an energy storage converter cabinet provided in this embodiment of the present disclosure; Figure 9 This is a schematic diagram of the structure of a first noise reduction unit provided in an embodiment of the present disclosure; Figure 10 This is a schematic diagram of another first noise reduction unit provided in an embodiment of the present disclosure; Figure 11 This is a structural diagram of the side and top of a cabinet provided in an embodiment of the present disclosure; Figure 12 This is a schematic diagram of a power electronic device provided in an embodiment of the present disclosure.

[0024] Explanation of reference numerals in the attached figures: Cabinet 1, Heat source component 2, Gas-liquid heat exchanger 3, Liquid cooling plate 4, Liquid cooling heat dissipation piping 5, Control module 6, Junction point A, Top 1a, Bottom 1b, Side 1c, Accommodation space 1d, Fan 31, Heat transfer pipe 32, Liquid inlet 41, Liquid outlet 42, Liquid cooling main circuit 51, First liquid cooling circuit 52, Second liquid cooling circuit 53, Three-way valve 54, First end 541, Second end 542, Third end 543, Liquid inlet circuit 531, External circuit 532, Liquid return circuit 533, Temperature sensor 61, Rotation speed acquisition unit 62, Control unit 63, Calculation unit 64, Judgment unit 65, Water pump 7, First temperature detection unit 8, Second temperature detection unit 9, First noise reduction unit 10, Shock absorber 101, Mounting base 11, Second noise reduction unit 12, Protective layer 111, Sound absorption layer 112, Fireproof layer 113, First valve 55, Expansion tank 56, Second valve 57, Energy storage converter cabinet 100 and power electronic equipment 200. Detailed Implementation

[0025] In the field of power electronic equipment technology, high-power-density devices, represented by energy storage converter cabinets, are widely used in new energy systems. The core power devices in these devices, such as Insulated Gate Bipolar Transistor Modules (IGBTs), generate a significant amount of heat during operation. If this heat cannot be dissipated effectively and promptly, the junction temperature of the devices will continuously rise, leading to risks such as performance degradation, shortened lifespan, and even thermal failure, thus affecting the operational stability and safety of the equipment. Therefore, efficient thermal management is crucial for ensuring the reliable operation of power electronic equipment.

[0026] The root cause of the above problems is that, with the continuous improvement of power levels and integration, the heat generated per unit volume of equipment increases significantly, and traditional heat dissipation methods are unable to meet the heat dissipation requirements in high heat density scenarios. Especially under full load or continuous operation conditions, local hot spots are prone to accumulate, and conventional heat dissipation methods are slow to respond and cannot achieve rapid and uniform heat removal.

[0027] To alleviate the aforementioned problems, the art typically employs either air cooling or liquid cooling for heat dissipation. Air cooling technology uses a fan to force air convection to remove heat; it has a simple structure but low heat exchange efficiency and struggles to handle high heat loads. Liquid cooling technology, on the other hand, is widely used due to its higher specific heat capacity and thermal conductivity. Existing liquid cooling technologies mainly include two typical implementation methods: one is direct liquid cooling, where the coolant is directly applied to the surface of the IGBT module through spraying or immersion, offering high heat dissipation efficiency but posing risks to electrical insulation and leakage; the other is indirect liquid cooling, where a liquid cooling plate is placed below the IGBT module, and the coolant circulates within the plate's internal channels, removing heat through thermal conduction. This method offers high safety and ease of integration, and is currently the mainstream technology.

[0028] However, further research has revealed several limitations of existing liquid cooling solutions: Firstly, under high load conditions, most existing indirect liquid cooling systems employ a fixed flow channel design, with the coolant constantly flowing through an external heat exchanger. This makes it impossible to dynamically adjust the heat dissipation intensity according to the actual heat load, leading to overcooling at low loads. Secondly, continuously increasing fan speed to enhance heat dissipation capacity results in significant operating noise, affecting the quietness of the equipment deployment environment. Furthermore, the complex piping design of the cooling system necessitates manual switching of flow channels or draining of coolant during maintenance, making the operation cumbersome, reliant on professional personnel, and increasing maintenance costs.

[0029] Based on the above in-depth analysis of the technical problems, this disclosure creatively proposes an energy storage converter cabinet. By setting up a composite liquid cooling pipeline structure including a liquid cooling main circuit, a three-way valve, a first liquid cooling circuit and a second liquid cooling circuit, and combining the control module to coordinate the opening degree of the three-way valve and the current speed of the fan, a technical breakthrough of on-demand heat dissipation and intelligent distribution of cooling flow is achieved, effectively solving the problems of insufficient heat dissipation efficiency, high operating noise and complex maintenance in the prior art.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the disclosure. However, the technical solutions claimed in this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0033] refer to Figures 1 to 2 The energy storage converter cabinet provided in this embodiment includes: cabinet 1, heat source component 2, gas-liquid heat exchanger 3, liquid cooling plate 4, liquid cooling heat dissipation pipeline 5, and control module 6.

[0034] The cabinet 1 encloses a storage space 1d.

[0035] In this embodiment of the disclosure, the shape and size of the cabinet 1 can be determined according to design requirements; for example, the shape of the cabinet 1 can be a cube, cuboid, cylinder, etc.

[0036] The heat source component 2 is located in the accommodating space 1d.

[0037] In this embodiment of the disclosure, heat source 2 refers to a component that can generate heat during operation. For example, in the energy storage converter cabinet, the heat source 2 can be an IGBT module.

[0038] The gas-liquid heat exchanger 3 is disposed outside the accommodating space 1d, and the gas-liquid heat exchanger 3 includes a fan 31.

[0039] In this embodiment, the gas-liquid heat exchanger 3 is used for heat exchange between gas and liquid. It can absorb the heat from the high-temperature liquid transmitted by the liquid-cooled heat dissipation pipe 5 through the low-temperature gas, thereby cooling the liquid and transferring the absorbed heat to the external environment. This gas-liquid heat exchanger 3 can realize heat exchange between the coolant and the air, and can also be called an air-water heat exchanger.

[0040] like Figure 2 As shown, fan 31 is located on the side of gas-liquid heat exchanger 3 facing away from cabinet 1. The airflow direction is from the side of gas-liquid heat exchanger 3 closest to cabinet 1, through the gas-liquid heat exchanger 3, and towards the side of gas-liquid heat exchanger 3 facing away from cabinet 1. When fan 31 rotates, it can accelerate the airflow, thereby further improving the heat dissipation efficiency of gas-liquid heat exchanger 3. The number of fans corresponding to gas-liquid heat exchanger 3 can be one, two, or three, etc.

[0041] It should be noted that fan 31 also generates noise when it is running, and the faster the speed, the louder the noise. Therefore, in order to further reduce noise, the speed of fan 31 needs to be controlled.

[0042] The liquid cooling plate 4 is disposed in the accommodating space 1d and includes an inlet 41 and an outlet 42. The liquid cooling plate 4 is used to dissipate heat from the heat source component 2.

[0043] The liquid cooling heat dissipation pipeline 5 includes a liquid cooling main circuit 51, a first liquid cooling circuit 52, a second liquid cooling circuit 53, and a three-way valve 54. The three-way valve 54, the liquid cooling main circuit 51, and the first liquid cooling circuit 52 are arranged in the accommodating space 1d.

[0044] The liquid cooling main circuit 51 is connected to the liquid outlet 42 and the first end 541 of the three-way valve 54 at both ends. The first liquid cooling circuit 52 is connected between the second end 542 of the three-way valve 54 and the liquid inlet 41. The second liquid cooling circuit 53 is connected between the third end 543 of the three-way valve 54 and the liquid inlet 41. The second liquid cooling circuit 53 includes a liquid inlet circuit 531, an external circuit 532 and a liquid return circuit 533 connected in sequence. The liquid inlet circuit 531 is set in the accommodating space 1d and connected to the third end 543 of the three-way valve 54. The external circuit 532 is set in the gas-liquid heat exchanger 3. The liquid return circuit 533 is set in the accommodating space 1d and connected to the liquid inlet 41.

[0045] In some embodiments, the first liquid cooling circuit 52 and the second liquid cooling circuit 53 can be connected to the liquid inlet 41 after converging at the confluence point A.

[0046] In this embodiment of the disclosure, the shape of the three-way valve 54 can be determined according to design requirements; for example, the shape of the three-way valve 54 can be a cube, cuboid, cylinder, etc.

[0047] The control module 6 is electrically connected to the three-way valve 54 and the fan 31 respectively. The control module 6 is configured to acquire the temperature of the heat source 2 and the current speed of the fan 31, and send control commands to the three-way valve 54 and the fan 31 to adjust the opening degree of the three-way valve 54 and / or the current speed of the fan 31.

[0048] The energy storage converter cabinet provided in this embodiment incorporates a liquid-cooled plate within its housing space. The plate's inlet and outlet are connected to a liquid-cooled heat dissipation pipeline. This allows the liquid-cooled plate to absorb heat generated during the operation of the heat source components and transfer this heat to the coolant flowing inside. The coolant circulates within the liquid-cooled heat dissipation pipeline to dissipate the heat. Furthermore, the liquid-cooled heat dissipation pipeline employs a composite pipeline structure, including a main liquid-cooled circuit, a three-way valve, a first liquid-cooled circuit, and a second liquid-cooled circuit. The first liquid-cooled circuit forms the circulation path of the coolant within the cabinet, while the second liquid-cooled circuit, via an external circuit, passes through a gas-liquid heat exchanger to form an external circulation path for the coolant. The gas-liquid heat exchanger is equipped with a fan to force air to exchange heat with the coolant within the heat exchanger, significantly improving its heat dissipation efficiency. The control module dynamically adjusts the opening of the three-way valve and / or the current fan speed based on the temperature of the heat source components and the current fan speed, thereby controlling the flow distribution ratio of the coolant between the first and second liquid-cooled circuits. When the heat load is low, the coolant flow rate of the first liquid cooling circuit is increased, while the flow rate through the gas-liquid heat exchanger is reduced, thereby lowering the current fan speed, effectively saving energy and reducing fan noise. When the heat load increases, the flow rate of the second liquid cooling circuit is increased to enhance the external circulation heat dissipation capacity and ensure that the temperature of the heat source components remains within a safe range. This design achieves synergistic optimization of heat dissipation performance, energy consumption, and noise, improving the adaptability and operational reliability of the energy storage converter cabinet under different operating conditions.

[0049] The embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0050] In some embodiments, reference Figure 3 As shown, the control module 6 includes: a temperature sensor 61, a speed acquisition unit 62, and a control unit 63.

[0051] Temperature sensor 61 is disposed within the accommodating space 1d and is used to detect the temperature of heat source component 2.

[0052] The speed acquisition unit 62 is used to acquire the current speed of the fan 31.

[0053] The control unit 63 is electrically connected to the temperature sensor 61, the speed acquisition unit 62, the three-way valve 54, and the fan 31. The control unit 63 is configured to receive the temperature signal of the heat source 2 and the current speed signal of the fan 31, and send control commands to the three-way valve 54 and the fan 31 to adjust the opening degree of the three-way valve 54 and / or the current speed of the fan 31.

[0054] It should be noted that the control unit can be a microcontroller, ARM (Advanced RISC Machines), or FPGA (Field Programmable Gate Array), etc., which can be determined according to the actual design requirements.

[0055] refer to Figure 4 As shown, in some embodiments, the control module 6 further includes: a calculation unit 64, configured to obtain the target water temperature of the coolant in the energy storage converter cabinet based on the temperature of the heat source 2, and based on at least one of the power of the energy storage converter cabinet, the ambient temperature inside the cabinet, and the ambient humidity inside the cabinet, and to obtain the current speed of the fan based on the ambient temperature and the target water temperature, and to obtain the maximum value of the fan speed based on the rated maximum ambient temperature; a judgment unit 65, configured to obtain the current speed of the fan 31 and compare the current speed with the maximum value; and a control unit 63, further configured to send a control command to the three-way valve 54 and the fan 31 if the current speed is greater than or equal to the maximum value, so as to adjust the opening of the three-way valve 54, reduce the flow of coolant to the second liquid cooling circuit 53, and reduce the current speed of the fan 31 until the current speed is less than the maximum value.

[0056] The maximum fan speed refers to the highest permissible speed of fan 31 that corresponds to the acceptable noise level under the premise of meeting current heat dissipation requirements. This maximum value can be set based on noise control objectives and heat dissipation requirements: when the fan speed of 31 increases to the point that it may cause excessive noise, even if there is still room for improvement in heat dissipation capacity, the system will limit its speed within this maximum value to ensure the quietness of the operating environment of the energy storage converter cabinet.

[0057] For example, the noise control target can be a preset decibel level. The maximum fan speed can be defined as the highest permissible speed of fan 31 in the gas-liquid heat exchanger 3 under the harsh design condition of rated maximum ambient temperature, when the system is running at full load, in order to keep the overall noise level below the preset decibel level. It is understood that the maximum fan speed is an insurmountable upper limit, and it is necessary to ensure that the actual speed of fan 31 does not exceed the maximum value to ensure that the noise level is controlled below the preset decibel level.

[0058] The target water temperature refers to the minimum allowable temperature that the coolant should reach before entering the liquid cooling plate 4. This ensures effective absorption of heat from the heat source component 2 while preventing condensation inside the energy storage converter cabinet due to overcooling. This target water temperature is not a fixed value but is calculated by the control module 6 based on the temperature of the heat source component 2, the power of the energy storage converter cabinet, the ambient temperature inside the cabinet, and the ambient humidity inside the cabinet. In practical applications, environmental parameters may also include the temperature of the reactors inside the energy storage converter cabinet.

[0059] In some embodiments, the target water temperature is determined by calculation using the following steps: S1: Determine the first cooling water temperature T1 based on the power of the energy storage converter cabinet and the temperature of the IGBT module.

[0060] Specifically, the power of the energy storage converter cabinet and the temperature of the IGBT module are monitored in real time to calculate the junction temperature of the IGBT chip. This junction temperature is compared with the preset junction temperature upper limit protection value to obtain the excess heat dissipation capacity ΔT1 under the current operating conditions. Based on ΔT1, the highest acceptable cooling water temperature T1 is calculated, which is the highest acceptable water temperature under the premise of ensuring that the IGBT module does not overheat, thereby avoiding excessive cooling and energy waste.

[0061] S2: Determine the second cooling water temperature T2 based on the reactor temperature and the ambient temperature inside the cabinet.

[0062] The energy storage converter cabinet also includes reactors. To ensure that the reactors operate within a safe temperature range and prevent insulation aging, performance degradation, or even burnout due to overheating, the minimum required cooling intensity can be calculated backwards based on their actual temperature rise. Specifically, the actual temperature of the reactor is obtained through the PT100 temperature sensor built into the reactor, and the temperature rise of the reactor is calculated in conjunction with the ambient temperature inside the cabinet. This temperature rise is compared with the maximum allowable temperature rise limit to determine whether the current heat dissipation capacity meets the requirements. If the temperature rise is close to or exceeds the limit, the cooling effect needs to be enhanced. Based on this, the maximum allowable cooling water temperature T2 to ensure that the reactor temperature rise is within a safe range is calculated backwards. That is, the highest acceptable inlet water temperature under the premise of meeting the reactor's heat dissipation requirements, thereby avoiding overheating of the energy storage converter cabinet due to insufficient cooling and improving the reliability of the energy storage converter cabinet operation.

[0063] S3: Determine the third cooling water temperature T3 based on the ambient temperature and humidity inside the cabinet.

[0064] Specifically, the ambient temperature and humidity inside the cabinet are collected by temperature and humidity sensors. The dew point temperature of the air inside the cabinet is calculated based on the thermodynamic characteristics of humid air. This dew point temperature is used as the lower limit for controlling the coolant temperature to prevent condensation on the liquid cooling plate 4 or pipe surface due to excessively low coolant temperature. Conversely, the dew point temperature is set as the upper limit T3 of the cooling water temperature, which is the highest allowable cooling water temperature for the energy storage converter cabinet without causing condensation risk. This effectively avoids insulation failure or electrical short circuit caused by moisture condensation and ensures the safety of the operating environment of the energy storage converter cabinet.

[0065] S4: Take the maximum value among the first cooling water temperature T1, the second cooling water temperature T2, and the third cooling water temperature T3 as the target water temperature T0.

[0066] This calculation method comprehensively considers the thermal safety of power devices, the temperature rise limit of key components, and the anti-condensation requirements inside the cabinet, ensuring that efficient heat dissipation can be achieved under various operating conditions, while avoiding safety hazards caused by excessive or insufficient cooling. It achieves synergistic optimization of heat dissipation performance and the reliability of energy storage converter cabinet.

[0067] Based on the ambient air temperature and the target water temperature, obtain the current speed of fan 31, including: With the target water temperature as the control objective, the three-way valve 54 is fully open (i.e., the gas-liquid heat exchanger 3 is used preferentially). Combining the current ambient temperature with the performance model of the gas-liquid heat exchanger 3, the minimum airflow required to reach the target water temperature is calculated and further converted into the theoretical minimum fan speed, Speed1. The minimum fan speed, Speed1, can be understood as the operating target of fan 31. That is, the current speed of fan 31 will at least be close to or equal to the minimum fan speed. Furthermore, under high heat dissipation demands, such as high load or high temperature conditions, the current speed of fan 31 may also exceed the minimum fan speed to meet the heat dissipation requirements.

[0068] Under normal operating conditions, which may be low-temperature / normal-temperature or low-load conditions, the calculated minimum fan speed Speed1 is less than the maximum fan speed, indicating that the noise generated by the cooling demand is within an acceptable range, i.e., the noise is less than the preset decibel, and the cabinet's cooling capacity is sufficient. The current speed of fan 31 is the calculated minimum fan speed. Accordingly, fan 31 operates at the calculated minimum fan speed, without needing to adjust the current speed of fan 31 or the opening of the three-way valve 54.

[0069] Under high load or high temperature conditions, the calculated minimum fan speed Speed1 may exceed the maximum fan speed. If fan 31 continues to operate at the calculated minimum speed Speed1, although the cooling requirements can be met, the operating noise of fan 31 will exceed the preset decibel limit. Therefore, it is necessary to control the speed of fan 31 and limit its current speed to within the maximum fan speed range to ensure that the noise is within the preset decibel limit.

[0070] Understandably, under the aforementioned high-load or high-temperature conditions, when the current speed of fan 31 is limited to below the maximum fan speed, in order to maintain the overall heat dissipation capacity of the cabinet, the opening of the three-way valve 54 can be adjusted to reduce the proportion of coolant flow to the gas-liquid heat exchanger 3, thereby reducing the heat dissipation burden on the external gas-liquid heat exchanger 3, and effectively absorbing heat from the heat source component 2 through the liquid cooling plate 4.

[0071] It should also be noted that under high load or high temperature conditions, the power of the heat source component 2 inside the cabinet can be reduced to reduce its heat generation, thereby lowering the target water temperature and thus reducing the minimum fan speed. This will make the current speed of fan 31 lower than the maximum fan speed, thereby achieving the purpose of noise control.

[0072] As the above analysis shows, the current speed of fan 31 is indirectly obtained by acquiring the minimum fan speed, and the relationship between the current speed and the maximum speed of fan 31 is obtained by comparing the minimum fan speed with the maximum speed. In other words, the speed acquisition unit 62 can obtain the current speed of fan 31 by acquiring the minimum fan speed. The current speed of fan 31 is greater than or equal to the minimum fan speed. If the minimum fan speed is greater than the maximum fan speed, then the current speed of fan 31 is greater than the maximum fan speed.

[0073] It is understandable that the target water temperature changes in real time with the changes in the operating status, such as changes in the power of heat source component 2 or changes in the ambient temperature. Under the dynamic changes of the target water temperature, the calculated minimum fan speed is also adjusted in real time. Therefore, by comparing the relationship between the minimum fan speed and the maximum value in real time or periodically, the opening of the three-way valve 54 is adjusted to reduce the current speed of fan 31 until the current speed is less than the maximum value.

[0074] Through the aforementioned control logic, this embodiment achieves dynamic matching between cooling demand and heat dissipation capacity. On one hand, by comprehensively setting the target water temperature based on multi-dimensional operating parameters, overcooling or undercooling caused by single-parameter control is avoided, improving the accuracy of thermal management. On the other hand, under high-load or high-temperature conditions, when the calculated minimum fan speed exceeds the maximum fan speed, the current fan speed is reduced until it is less than the maximum value. Simultaneously, the opening of the three-way valve 54 is adjusted to regulate the distribution ratio of coolant between the inner and outer circulation loops, thereby reducing the reliance on the gas-liquid heat exchanger for heat dissipation. This strategy effectively suppresses excessive noise caused by fan overspeed operation. While ensuring heat dissipation performance, it significantly reduces operating noise and energy consumption under high-load conditions, thereby improving the operational stability, safety, and environmental adaptability of the energy storage converter cabinet under complex environments and variable load conditions.

[0075] The following will provide a more detailed description of the energy storage converter cabinet.

[0076] In some embodiments, reference Figure 2The energy storage converter cabinet also includes: a water pump 7, which is located in the liquid cooling main circuit 51 and connected between the liquid inlet 41 and the first end 541 of the three-way valve 54; the control unit 63 is also configured to: when a control command is sent to the three-way valve 54, simultaneously send a control command to the water pump 7 to increase the speed of the water pump 7.

[0077] The water pump 7 drives the coolant to circulate in the liquid cooling heat dissipation pipe 5. Under the aforementioned high load or high temperature conditions, since the current fan speed is reduced, the water pump speed can be increased to ensure the heat dissipation capacity of the cabinet. This also helps to reduce the demand on the gas-liquid heat exchanger and ensure heat dissipation capacity.

[0078] In some embodiments, to compensate for the possible decrease in heat dissipation capacity due to the reduced flow rate of the second liquid cooling circuit 53, the control module 6 synchronously increases the speed of the water pump 7, enhances the overall circulation power of the coolant in the liquid cooling heat dissipation pipe 5, and ensures that the coolant entering the liquid cooling plate 4 still has sufficient flow rate and heat exchange efficiency to maintain effective cooling of the heat source component 2.

[0079] In some embodiments, when the current rotational speed is less than the maximum value, the determination unit 65 is further configured to: compare the ambient temperature with a first preset ambient temperature; the control unit 63 is further configured to: if the ambient temperature is less than the first preset ambient temperature, send a control command to the fan 31 to reduce the current rotational speed of the fan 31.

[0080] Specifically, when the current speed of fan 31 has not yet reached the maximum value set based on noise acceptability, control module 6 further acquires the current ambient temperature and compares it with a first preset ambient temperature. If the ambient temperature is lower than the first preset ambient temperature, it indicates that the external heat dissipation conditions are good and the heat exchange efficiency of gas-liquid heat exchanger 3 is high. Even if the speed of fan 31 is reduced, the current heat dissipation requirements can still be met. In this case, control module 6 actively reduces the current speed of fan 31, thereby effectively reducing the noise and energy consumption of the energy storage converter cabinet.

[0081] In other words, when the ambient temperature is low, heat dissipation is relatively easy, and the calculated minimum fan speed is also relatively low. At this time, the fan speed can be reduced to achieve low-noise operation.

[0082] This control strategy makes full use of the natural cooling capacity of the external environment, actively weakens the intensity of active air cooling in low-temperature environments, avoids unnecessary energy waste and noise generation, realizes the adaptive adjustment of the heat dissipation system under different environmental conditions, and improves the overall energy efficiency and environmental friendliness of the energy storage converter cabinet.

[0083] In some embodiments, the determination unit 65 is further configured to: compare the temperature of the heat source 2 with a preset temperature; the control unit 63 is further configured to: if the temperature of the heat source 2 is less than the preset temperature, send a control command to the fan 31 to control the current speed of the fan 31 to be reduced according to a first preset speed reduction ratio.

[0084] If the temperature of heat source component 2 is lower than the preset temperature, it indicates that the current energy storage converter cabinet is operating under low or light load conditions, with lower heat generation and reduced heat dissipation demand. In this case, the control module 6 determines that it is not necessary to maintain high fan speed operation, and then controls the current speed of fan 31 to be gradually reduced according to the first preset speed reduction ratio until it matches the current heat dissipation load.

[0085] In this embodiment of the disclosure, the preset temperature range can be 50℃~60℃, specifically, the preset temperature is 50℃, 52℃, 54℃, 56℃, 58℃ or 60℃. The first preset deceleration ratio ranges from 3% to 10%, specifically, the first preset deceleration ratio is 3%, 6%, 7%, 8% or 10%.

[0086] This control strategy fully considers the actual thermal state of the energy storage converter cabinet. Under the premise of ensuring safe operation, it actively reduces the output power of fan 31, effectively reducing energy consumption and operating noise. At the same time, it adopts a proportional speed reduction method to avoid control oscillations caused by sudden speed changes, thereby improving the smoothness and reliability of the adjustment process.

[0087] In some embodiments, the determination unit 65 is further configured to: compare the temperature of the heat source 2 with a preset temperature, and if the temperature of the heat source 2 is greater than or equal to the preset temperature, compare the difference between the liquid temperature at the inlet 41 and the liquid temperature at the outlet 42 of the gas-liquid heat exchanger 3 with a preset temperature difference; the control unit 63 is further configured to: if the temperature of the heat source 2 is greater than or equal to the preset temperature, and the difference between the liquid temperature at the inlet 41 and the liquid temperature at the outlet 42 of the gas-liquid heat exchanger 3 is greater than the preset temperature difference, send a control command to the fan 31 to control the current speed of the fan 31 to be reduced according to a second preset speed reduction ratio.

[0088] When the temperature of heat source component 2 is greater than or equal to the preset temperature, it indicates that the energy storage converter cabinet is under high load and has a strong heat dissipation requirement. Control module 6 further acquires the liquid temperature difference between the inlet 41 and outlet 42 of the gas-liquid heat exchanger 3 and compares it with the preset temperature difference. If the temperature difference is greater than the preset temperature difference, it indicates that the coolant has released a large amount of heat in the gas-liquid heat exchanger 3, and the gas-liquid heat exchanger 3 is in a highly efficient working state. This also indicates that the current speed of fan 31 has reached or even exceeded the actual required level. Therefore, control module 6 controls the current speed of fan 31 to be gradually reduced according to the second preset speed reduction ratio, thereby further reducing the noise generated by fan 31 without affecting the performance of heat source component 2.

[0089] In this embodiment of the disclosure, the preset temperature difference ranges from 3°C to 5°C, specifically, the preset temperature difference is 3°C, 3.5°C, 4°C, 4.5°C, or 5°C. The second preset rate reduction ratio ranges from 3% to 10%, specifically, the second preset rate reduction ratio is 3%, 6%, 7%, 8%, or 10%. The second preset rate reduction ratio and the first preset rate reduction ratio can be the same or different.

[0090] When adjusting the current wind speed of fan 31, the control strategy introduces the inlet and outlet temperature difference feedback of gas-liquid heat exchanger 3 as the key judgment basis. By combining the two conditions of high temperature of heat source component 2 and full operation of gas-liquid heat exchanger 3, the system identifies the working condition of excessive air volume and actively reduces the speed of fan 31. Without affecting the performance of heat source component 2, the system further reduces the noise and energy consumption generated by fan 31.

[0091] In some embodiments, to facilitate accurate measurement of the temperature of the heat source 2, a reference is made. Figure 5 As shown, the energy storage converter cabinet also includes a first temperature detection unit 8, which is electrically connected to the control module 6. The first temperature detection unit 8 is used to: detect the temperature of the heat source component 2 during the operation of the energy storage converter cabinet; and transmit the temperature of the heat source component 2 to the control module 6.

[0092] The first temperature detection unit 8 can be a temperature sensing element such as a temperature sensor, and its number is not limited. The first temperature detection unit 8 transmits the detected temperature to the control module 6. The control module 6 processes the received temperature to determine the temperature of the heat source 2. For example, if a single temperature sensor is used, the sensor transmits the collected temperature to the control module 6, and the control module 6 determines this temperature as the temperature of the heat source 2. If multiple temperature sensors are used, the multiple temperatures collected by the multiple sensors are all transmitted to the control module 6, and the control module 6 determines the average of the multiple temperatures as the temperature of the heat source 2. Of course, other temperature determination methods can also be used.

[0093] In some embodiments, to facilitate accurate measurement of the inlet 41 temperature and outlet 42 temperature of the gas-liquid heat exchanger 3, a reference is made. Figure 5 As shown, the energy storage converter cabinet also includes a second temperature detection unit 9, which is electrically connected to the control module 6. The second temperature detection unit 9 is used to: detect the temperature of the inlet 41 and the outlet 42 of the gas-liquid heat exchanger 3 during the operation of the energy storage converter cabinet; and transmit the temperature of the inlet 41 and the outlet 42 of the gas-liquid heat exchanger 3 to the control module 6.

[0094] The second temperature detection unit 9 can be a temperature sensing element such as a temperature sensor. A temperature sensor can be installed at the inlet 41 and outlet 42 of the gas-liquid heat exchanger 3 to detect the temperature at the inlet 41 and outlet 42 of the gas-liquid heat exchanger 3. The control module 6 can also be used to calculate the difference between the temperature at the inlet 41 and outlet 42 of the gas-liquid heat exchanger 3 to obtain the inlet and outlet liquid temperature difference of the gas-liquid heat exchanger 3.

[0095] In some embodiments, the determination unit 65 is further configured to: compare the ambient temperature with a second preset ambient temperature, wherein the second preset ambient temperature is less than the first preset ambient temperature; the control unit 63 is further configured to: if the ambient temperature is less than the second preset ambient temperature, send a control command to the fan 31 to reduce the current speed of the fan 31 to a second speed, and send a control command to the three-way valve 54 to adjust the opening of the three-way valve 54 to shut off the second liquid cooling circuit 53.

[0096] When the ambient temperature is lower than the second preset ambient temperature, it indicates that the external ambient temperature is extremely low. The heat generated by the energy storage converter cabinet can be fully absorbed by the system's own heat capacity and natural heat dissipation, without the need for forced cooling through the gas-liquid heat exchanger 3. Under this condition, the control module 6 reduces the current speed of the fan 31 to the second speed; at the same time, it adjusts the opening of the three-way valve 54 to cut off the flow of coolant to the second liquid cooling circuit 53, so that the coolant circulates only in the first liquid cooling circuit 52, thereby minimizing the fan's operating noise and energy consumption.

[0097] In some embodiments, the second rotation speed is 0, that is, the fan 31 stops running, further achieving zero wind noise and minimizing power consumption.

[0098] In some examples, the first preset temperature can be any value between -5°C and 10°C, for example, it can be -4°C, 0°C, 2°C, 5°C or 8°C.

[0099] In some examples, the second preset temperature can be any value between -10℃ and 0℃, for example, it can be -8℃, -6℃, -4℃ or -2℃.

[0100] refer to Figure 6As shown, the control method for the energy storage converter cabinet provided in this embodiment includes at least the following steps: S101: Based on the temperature of the heat source 2, and based on at least one of the power of the energy storage converter cabinet, the ambient temperature inside the cabinet, and the ambient humidity inside the cabinet, obtain the target water temperature of the coolant inside the energy storage converter cabinet.

[0101] S102: Obtain the current speed of the fan 31 based on the ambient temperature and the target water temperature, and obtain the maximum speed of the fan 31 based on the rated maximum ambient temperature.

[0102] S103: Determine whether the current speed of fan 31 is greater than or equal to the maximum value.

[0103] If so, execute S104.

[0104] S104: Adjust the opening of the three-way valve 54 to reduce the flow of coolant to the second liquid cooling circuit 53 and reduce the current speed of the fan 31 until the current speed is less than the maximum value.

[0105] refer to Figure 7 As shown, when the current speed of fan 31 is less than its maximum value, it can be determined whether the current speed of fan 31 can be further reduced based on the ambient temperature. This includes the following steps: S201: Obtain the ambient temperature.

[0106] S202: Determine whether the ambient temperature is lower than the first preset ambient temperature.

[0107] If so, execute S203.

[0108] S203: Determine whether the ambient temperature is greater than the second preset ambient temperature.

[0109] Yes, proceed to S204; otherwise, proceed to S205.

[0110] S204: Reduce the current speed of fan 31.

[0111] S205: Reduce the current fan speed to the second speed and adjust the opening of the three-way valve to shut off the second liquid cooling circuit.

[0112] refer to Figure 8 As shown, step S205 further includes the following steps: S2051: Obtain the temperature of heat source component 2.

[0113] S2052: Determine whether the temperature of heat source component 2 is lower than the preset temperature.

[0114] If yes, execute S2053; otherwise, execute S2054.

[0115] S2053: Control the current speed of fan 31 to be reduced according to the first preset speed reduction ratio.

[0116] S2054: Obtain the liquid temperature at the inlet 41 and the liquid temperature at the outlet 42 of the gas-liquid heat exchanger 3.

[0117] S2055: Determine whether the difference between the liquid temperature at the inlet 41 and the liquid temperature at the outlet 42 of the gas-liquid heat exchanger 3 is greater than the preset temperature difference.

[0118] If so, execute S2056.

[0119] S2056: Control the current speed of fan 31 to be reduced according to the second preset speed reduction ratio.

[0120] It should be noted that the above control logic is continuously executed cyclically throughout the entire operation of the energy storage converter cabinet. The aim is to continuously adjust the opening of the three-way valve 54 and / or the current speed of the fan 31 based on real-time monitoring of parameters such as the heat load of the energy storage converter cabinet, ambient temperature, humidity, and the operating status of the gas-liquid heat exchanger 3. While ensuring that heat dissipation requirements are met, the fan 31 speed is preferentially reduced to minimize its energy consumption and operating noise.

[0121] In some embodiments, fan 31 has a rated speed, and the current speed is less than or equal to 50% of the rated speed.

[0122] Rated speed refers to the highest designed speed of fan 31 when operating normally under rated voltage and rated power. It represents its maximum airflow and strongest heat dissipation capacity, corresponding to the full-load operating state of fan 31. The noise level of fan 31 is closely related to its speed, and usually increases significantly with increasing speed. Controlling the current speed to below 50% of the rated speed can significantly reduce the operating noise of fan 31, achieving quiet operation, which is especially suitable for noise-sensitive applications.

[0123] In some embodiments, reference Figure 1 and Figure 5 As shown, the cabinet 1 includes a top 1a and a bottom 1b arranged opposite to each other, and a side 1c connecting the top 1a and the bottom 1b; the gas-liquid heat exchanger 3 is arranged on the top 1a; the gas-liquid heat exchanger 3 includes a wind chamber 33, through which an external circuit 532 flows, and a fan 31 is arranged in the wind chamber and faces the external circuit 532.

[0124] Specifically, the gas-liquid heat exchanger 3 also includes a heat transfer pipe 32 and a wind chamber 33. The fan 31 and the heat transfer pipe 32 are both located within the wind chamber 33 and are positioned opposite each other. The coolant in the external circuit 532 flows through the heat transfer pipe 32 into the wind chamber 33. In other words, the wind chamber 33 not only houses the fan 31 and the heat transfer pipe 32 but also forms the outer shell of the gas-liquid heat exchanger 3. The fan 31 is directly opposite the external circuit 532, ensuring that the airflow direction during fan 31 operation is perpendicular or parallel to the heat transfer pipe 32, directly passing through the heat dissipation area surrounding the heat transfer pipe 32. Under the forced drive of the fan 31, external air forms a directional airflow within the wind chamber 33, efficiently carrying away the heat carried by the coolant flowing through the heat exchanger 3, completing the heat dissipation cycle. The wind chamber 33 not only guides and constrains airflow to improve heat exchange efficiency but also provides sound insulation and absorption, effectively suppressing the outward radiation of fan 31 noise. Simultaneously, the orderly airflow path reduces aerodynamic noise caused by turbulence, vortices, or airflow impact. Due to the improved heat exchange efficiency, the energy storage converter cabinet can operate at a lower fan speed while meeting the same heat dissipation requirements, further reducing the operating noise of the fan and achieving synergistic optimization of efficient heat dissipation and quiet operation.

[0125] It should be noted that in other embodiments, the gas-liquid heat exchanger 3 can be set at any position outside the cabinet 1. For example, the gas-liquid heat exchanger 3 can be set on the side 1c or at the bottom 1b.

[0126] In some embodiments, reference Figure 2 and Figure 5 As shown, the energy storage converter cabinet also includes a first noise reduction unit 10, which is located on the side of the bottom 1b away from the top 1a, and is used to reduce the vibration generated by the energy storage converter cabinet during operation.

[0127] In this embodiment, the first noise reduction unit 10 can absorb the kinetic energy generated by vibration and convert it into other forms of energy, thereby achieving the purpose of reducing vibration. The first noise reduction unit 10 includes, but is not limited to, a shock absorber 101, a shock-absorbing spring, a vibration isolator, or a hydraulic buffer.

[0128] In this embodiment of the disclosure, the vibration generated by the energy storage converter cabinet during operation mainly comes from components such as the water pump 7 and the reactor.

[0129] In some embodiments, reference Figure 9 and Figure 10 As shown, the first noise reduction unit 10 includes multiple shock absorbers 101, which are evenly distributed on the side of the bottom 1b away from the top 1a. This further reduces the vibration generated by the energy storage converter cabinet during operation. From the perspective of generating damping materials, the shock absorbers 101 include hydraulic shock absorbers 101 and pneumatic shock absorbers 101. The specific structure of the shock absorbers 101 can be obtained by referring to relevant technologies.

[0130] In some embodiments, reference Figure 10 As shown, the cross-sectional shape of the bottom 1b is quadrilateral. The first noise reduction unit 10 includes four shock absorbers 101, with one shock absorber 101 installed at each of the four corners of the bottom 1b. That is, a shock absorber 101 is installed at each of the four corners of the bottom 1b of the cabinet 1. This can effectively reduce the vibration generated by the energy storage converter cabinet during operation, and also maintain the balance and stability of the cabinet 1.

[0131] To provide solid support, refer to Figure 2 and Figure 5 As shown, the energy storage converter cabinet also includes a mounting base 11, which is located on the side of the shock absorber 101 away from the cabinet body 1.

[0132] In some embodiments, to further reduce the noise generated when the fan 31 rotates, reference is made to... Figure 2 and Figure 5 As shown, the energy storage converter cabinet also includes a second noise reduction unit 12, which is located on the side of the fan 31 away from the cabinet 1, and is used to reduce the noise generated by the operation of the fan 31. The second noise reduction unit 12 includes, but is not limited to, noise reduction components such as silencers.

[0133] In some embodiments, the liquid cooling plate 4 is in contact with the heat source 2.

[0134] refer to Figure 1 , Figure 2 and Figure 5 As shown, to further improve heat dissipation efficiency, the heat source component 2 is disposed on one side of the liquid cooling plate 4 and in contact with the liquid cooling plate 4; in this way, the heat generated by the heat source component 2 can be quickly transferred to the liquid cooling plate 4. Depending on the size of the heat source component 2, multiple heat source components 2 can share one liquid cooling plate 4, thereby improving the utilization rate of the liquid cooling plate 4 and reducing costs.

[0135] In some embodiments, to further reduce the noise of the energy storage converter cabinet, refer to Figure 11 As shown, the top 1a and side 1c include a protective layer 111, a sound-absorbing layer 112, and a fire-resistant layer 113 stacked together. The protective layer 111 is the innermost layer, protecting the sound-absorbing layer from mechanical damage or contamination. The sound-absorbing layer 112 is in the middle, absorbing sound waves to reduce noise. The fire-resistant layer 113 is the outermost layer, providing fire resistance to meet safety design requirements. This three-layer structure, consisting of the protective layer 111, the sound-absorbing layer 112, and the fire-resistant layer 113, is also known as sound-absorbing cotton, which further reduces overall noise while meeting fire safety design requirements.

[0136] It should be noted that the embodiments of this disclosure employ three methods for noise reduction. First, a first noise reduction unit 10 is used to reduce the vibration generated by the energy storage converter cabinet during operation, thereby reducing noise. Second, a second noise reduction unit 12 is used to reduce the noise generated by the operation of the fan 31. Third, based at least on the temperature of the heat source 2 and the current speed of the fan 31, the opening of the three-way valve 54 and / or the current speed of the fan 31 are adjusted, thereby reducing the noise generated by the operation of the fan 31. The energy storage converter cabinet provided in the embodiments of this disclosure can include any combination of these three methods. When applied in the PCS field, the energy storage converter cabinet incorporating these three noise reduction methods can reduce the operating noise sound pressure level to below 70 dB(A) under the highest load, providing excellent safety and user experience.

[0137] In some embodiments, to facilitate flexible control of the coolant flow rate within the liquid cooling heat dissipation pipe 5, refer to Figure 2 As shown, the liquid cooling heat dissipation pipeline 5 also includes a first valve 55. The first end of the first valve 55 is connected to the liquid inlet 41, the second end of the first valve 55 is connected to the first liquid cooling circuit 52, and the third end of the first valve 55 is connected to the return circuit 533. The first valve 55 can be an electronic three-way valve.

[0138] In some embodiments, the control module 6 is also used to control the opening degree of the first valve 55, thereby dynamically controlling the flow ratio of the coolant entering the liquid cooling plate 4 from the first liquid cooling circuit 52 and the second liquid cooling circuit 53, and realizing intelligent allocation of the cooling path.

[0139] For example, when the heat dissipation demand is low (such as when the energy storage converter cabinet is operating under light load or the ambient temperature is low), the control module 6 adjusts the opening of the first valve 55 so that its conduction direction is biased towards the second end 542, increasing the flow ratio of the first liquid cooling circuit 52, so that the coolant entering the liquid cooling plate 4 mainly comes from the internal circulation of the cabinet, effectively reducing the operating noise and power consumption of the fan 31.

[0140] When high heat dissipation demands are present (such as high-load operation of the energy storage converter cabinet or high ambient temperature), the control module 6 adjusts the opening of the first valve 55, shifting its conduction direction towards the third end 543. This increases the flow ratio of the second liquid cooling circuit 53, allowing more of the low-temperature coolant, fully cooled by the gas-liquid heat exchanger 3, to enter the liquid cooling plate 4, thus enhancing heat dissipation capacity. At this time, the control module fully utilizes the efficient cooling conditions of the external circulation to ensure the thermal safety of the critical energy storage converter cabinet. This control strategy achieves on-demand switching and proportional adjustment of the coolant flow path, balancing heat dissipation performance, energy efficiency optimization, and quiet operation.

[0141] In some embodiments, reference Figure 2As shown, the liquid cooling heat dissipation pipeline 5 also includes an expansion tank 56 and a second valve 57. The second valve 57 is installed on the liquid cooling main circuit 51. The outlets of the expansion tank 56 and the second valve 57 are connected. In this way, if the temperature change causes the volume of the coolant to change, the expansion tank 56 can hold part of the coolant to maintain the pressure balance of the liquid cooling heat dissipation pipeline 5.

[0142] It should be noted that, Figure 2 In the diagram, the dashed lines 4a, 4b, and 4c with arrows represent the temperature signals transmitted to the control module 6 for the liquid outlet 42 of the gas-liquid heat exchanger 3, the liquid inlet 41 of the gas-liquid heat exchanger 3, and the temperature signal of the heat source component 2, respectively.

[0143] According to some embodiments of this disclosure, another aspect of this disclosure also provides a power electronic device, with reference to... Figure 12 As shown, the power electronic equipment 200 includes the energy storage converter cabinet 100 as described in any of the above embodiments. For parts that are the same as or corresponding to those in the previous embodiment, please refer to the corresponding descriptions in the foregoing embodiments; detailed descriptions will not be repeated below.

[0144] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of this disclosure. Any person skilled in the art can make various alterations and modifications without departing from the spirit and scope of this disclosure; therefore, the scope of protection of this disclosure should be determined by the scope defined in the claims.

Claims

1. An energy storage converter cabinet, characterized in that, include: The cabinet, which encloses a storage space; A heat source component is disposed in the receiving space; A gas-liquid heat exchanger is disposed outside the accommodating space, and the gas-liquid heat exchanger includes a fan; A liquid cooling plate is disposed in the accommodating space and the liquid cooling plate includes a liquid inlet and a liquid outlet, the liquid cooling plate being used to dissipate heat from the heat source component; The liquid cooling heat dissipation pipeline includes a liquid cooling main circuit, a first liquid cooling circuit, a second liquid cooling circuit, and a three-way valve, wherein the three-way valve, the liquid cooling main circuit, and the first liquid cooling circuit are disposed in the accommodating space; The liquid cooling main circuit is connected to the liquid outlet and the first end of the three-way valve, respectively. The first liquid cooling circuit is connected between the second end of the three-way valve and the liquid inlet. The second liquid cooling circuit is connected between the third end of the three-way valve and the liquid inlet. The second liquid cooling circuit includes a liquid inlet circuit, an external circuit, and a liquid return circuit connected in sequence. The liquid inlet circuit is located in the accommodating space and connected to the third end of the three-way valve. The external circuit is located in the gas-liquid heat exchanger. The liquid return circuit is located in the accommodating space and connected to the liquid inlet. The control module is electrically connected to the three-way valve and the fan respectively. The control module is configured to acquire the temperature of the heat source and the current speed of the fan, and send control commands to the three-way valve and the fan to adjust the opening degree of the three-way valve and / or the current speed of the fan.

2. The energy storage converter cabinet according to claim 1, characterized in that, The control module includes: A temperature sensor is disposed within the accommodating space for detecting the temperature of the heat source component; A speed acquisition unit is used to acquire the current speed of the fan; The control unit is electrically connected to the temperature sensor and the speed acquisition unit, respectively. The control unit is configured to receive the temperature signal of the heat source and the current speed signal of the fan, and send control commands to the three-way valve and the fan to adjust the opening degree of the three-way valve and / or the current speed of the fan.

3. The energy storage converter cabinet according to claim 2, characterized in that, The control module also includes: The calculation unit is configured to obtain the target water temperature of the coolant in the energy storage converter cabinet based on the temperature of the heat source component, and based on at least one of the power of the energy storage converter cabinet, the ambient temperature inside the cabinet, and the ambient humidity inside the cabinet; and to obtain the current speed of the fan based on the ambient temperature and the target water temperature; and to obtain the maximum value of the fan speed based on the rated maximum ambient temperature. The judgment unit is configured to compare the current rotational speed with the maximum value; The control unit is further configured to send control commands to the three-way valve and the fan if the current rotational speed is greater than or equal to the maximum value, so as to adjust the opening of the three-way valve, reduce the flow of coolant to the second liquid cooling circuit, and reduce the current rotational speed of the fan until the current rotational speed is less than the maximum value.

4. The energy storage converter cabinet according to claim 3, characterized in that, The energy storage converter cabinet also includes a water pump, which is installed in the liquid cooling main circuit and connected between the liquid inlet and the first end of the three-way valve; The control unit is also configured to simultaneously send a control command to the water pump when a control command is sent to the three-way valve, so as to increase the speed of the water pump.

5. The energy storage converter cabinet according to claim 3, characterized in that, When the current rotational speed is less than the maximum value, the determining unit is further configured to: Compare the ambient temperature with the first preset ambient temperature; The control unit is also configured to send a control command to the fan to reduce the current speed of the fan if the ambient temperature is lower than the first preset ambient temperature.

6. The energy storage converter cabinet according to claim 5, characterized in that, The judgment unit is further configured to: compare the temperature of the heat source component with a preset temperature; The control unit is further configured to: if the temperature of the heat source component is lower than the preset temperature, send a control command to the fan to control the current speed of the fan to be reduced according to a first preset speed reduction ratio.

7. The energy storage converter cabinet according to claim 6, characterized in that, The judgment unit is further configured to: compare the temperature of the heat source component with the preset temperature, and if the temperature of the heat source component is greater than or equal to the preset temperature, compare the difference between the liquid temperature at the inlet and the liquid temperature at the outlet of the gas-liquid heat exchanger with the preset temperature difference. The control unit is further configured to: if the temperature of the heat source component is greater than or equal to the preset temperature, and the difference between the liquid temperature at the inlet and the liquid temperature at the outlet of the gas-liquid heat exchanger is greater than the preset temperature difference, then send a control command to the fan to control the current speed of the fan to be reduced according to the second preset speed reduction ratio.

8. The energy storage converter cabinet according to claim 5, characterized in that, The judgment unit is further configured to: compare the atmospheric ambient temperature with a second preset ambient temperature, wherein the second preset ambient temperature is less than the first preset ambient temperature; The control unit is further configured to: if the ambient temperature is lower than the second preset ambient temperature, send a control command to the fan to reduce the current speed of the fan to the second speed, and send a control command to the three-way valve to adjust the opening of the three-way valve to shut off the second liquid cooling circuit.

9. The energy storage converter cabinet according to claim 1, characterized in that, The fan has a rated speed, and the current speed is less than or equal to 50% of the rated speed.

10. The energy storage converter cabinet according to claim 1, characterized in that, The cabinet includes a top and a bottom disposed opposite each other, and a side portion connecting the top and the bottom; the gas-liquid heat exchanger is disposed on the top; the gas-liquid heat exchanger includes a wind chamber, through which the external circuit flows, and the fan is disposed in the wind chamber and faces the external circuit.

11. The energy storage converter cabinet according to claim 1, characterized in that, The cabinet includes a top and a bottom disposed opposite each other, and a side portion connecting the top and the bottom; the energy storage converter cabinet also includes: The first noise reduction unit is located on the bottom side away from the top, and is used to reduce the vibration generated by the energy storage converter cabinet during operation.

12. The energy storage converter cabinet according to claim 11, characterized in that, The first noise reduction unit includes multiple shock absorbers, which are evenly distributed on the bottom side away from the top.

13. The energy storage converter cabinet according to claim 11, characterized in that, The bottom has a quadrilateral cross-section, and the first noise reduction unit includes four shock absorbers, with one shock absorber at each of the four corners of the bottom.

14. The energy storage converter cabinet according to claim 1, characterized in that, The energy storage converter cabinet also includes a second noise reduction unit, which is located on the side of the fan away from the cabinet.

15. The energy storage converter cabinet according to claim 1, characterized in that, The liquid cooling plate is in contact with the heat source component.

16. The energy storage converter cabinet according to claim 1, characterized in that, The cabinet includes a top and a bottom that are arranged opposite to each other, and a side that connects the top and the bottom; the top and the side include a protective layer, a sound-absorbing layer and a fireproof layer that are stacked together.

17. A power electronic device, characterized in that, Includes the energy storage converter cabinet as described in any one of claims 1 to 16.

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