High-voltage electric energy conversion module
By installing the inverter module, transformer and rectifier module in the insulating sealed case and filling it with insulating liquid, the problems of large device volume and high frequency and high current loss in the prior art are solved, and a miniaturized and high-efficiency high-voltage power conversion module is realized.
Patent Information
- Application Number
- CN202510057709.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-04-25
AI Technical Summary
In existing power electronic transformers, the inverter module, transformer and rectifier module are independent packaging and air insulation, resulting in large device volume and high frequency and high current causing a large loss on the conductor.
The inverter module, transformer and rectifier module are installed inside an insulated sealed housing and filled with insulating liquid, and connected through conductive connectors to achieve electrical insulating atmosphere and efficient heat dissipation.
The volume of the device is reduced, the wire loss is reduced, the efficiency is improved and the cost is reduced, while ensuring the insulation performance of the high-voltage and low-voltage parts.
Smart Images
Figure CN119893914A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power conversion, and in particular to a high-voltage power conversion module. Background Art
[0002] Power Electronic Transformer (PET), also known as Solid State Transformer (SST), is a new type of intelligent transformer that combines power electronic conversion technology with electric energy conversion technology based on the principle of electromagnetic induction to achieve the conversion of electric energy with one power characteristic into electric energy with another power characteristic. Compared with traditional transformers, power electronic transformers have the following advantages: (1) light weight and low environmental pollution; (2) the secondary output voltage amplitude is constant during operation, does not change with load, and is smoothly adjustable; (3) the primary and secondary voltages are sinusoidal waveforms, and the power factor is adjustable; (4) the primary and secondary voltages, currents and powers are highly controllable; (5) they have the function of circuit breakers, and do not require traditional transformer relay protection devices. Therefore, power electronic transformers are widely used in energy storage systems, on-board power systems, regenerative charging and discharging systems, hybrid electric vehicles and other occasions.
[0003] The power electronic transformer is composed of several power electronic modules, such as Figure 1 As shown in the dashed box, each power electronic module is composed of a high-frequency inverter module 01 on the left, an isolation transformer 02 in the middle, and a high-frequency rectifier module 03 on the right. Among them, the high-frequency inverter module 01 converts DC into a high frequency of nkHz. This part often forms a resonant circuit with the distributed parameters of the inverter and the external capacitors and inductors to ensure that the switching process of the power semiconductor switching devices (IGBT and SiCMOS, etc.) operates in a zero voltage and zero current state. The isolation transformer 02 plays a role in boosting or reducing the voltage, and at the same time can ensure reliable insulation between the input and output sides of the transformer, such as meeting the 110kV / 50Hz / 1min withstand voltage test. The high-frequency rectifier module 03 on the right is responsible for rectifying the high-frequency current output by the isolation transformer into a DC output.
[0004] However, in existing solutions, such as Figure 2As shown, the inverter module, transformer and rectifier module of the power electronic module are independently packaged, for example, each module is packaged by an independent shell, and the inverter module, transformer and rectifier module are insulated by air. Since the part with high voltage electricity requires sufficient insulation performance with the low voltage part and the ground, this leads to the need to maintain a large insulation distance between the inverter module and the rectifier module to meet the insulation performance requirements of the high voltage and low voltage parts. In order to ensure that there is a sufficient insulation distance between the inverter module and the rectifier module, the volume of the entire power electronic module will inevitably increase. In addition, the independently packaged inverter module, transformer and rectifier module in the existing solution are far apart, which leads to the need to use a longer wire 04 for connection between the modules. However, the transformer has high frequency input and output, which makes the wires connecting the inverter module and the rectifier module to the transformer flow with high frequency and large current, and under the influence of skin effect and proximity effect, the loss of high frequency and large current on the wire is very large. Summary of the invention
[0005] In view of this, in order to address the above shortcomings, it is necessary to propose a high-voltage power conversion module with small size and low loss.
[0006] The present invention provides a high-voltage electric energy conversion module, comprising: an insulating sealed shell, an inverter module, a transformer and a rectifier module; the inverter module, the transformer and the rectifier module are all installed inside the insulating sealed shell, the DC end of the inverter module is led out from one end of the insulating sealed shell as a DC high-voltage end, the AC end of the inverter module is connected to the high-voltage coil of the transformer through a conductive connector, the low-voltage coil of the transformer is connected to the AC end of the rectifier module through a conductive connector, and the DC end of the rectifier module is led out from the other end of the insulating sealed shell as a DC low-voltage end; the inside of the insulating sealed shell is filled with insulating liquid, so that the inverter module, the transformer, the rectifier module and the conductive connector arranged inside the insulating sealed shell are completely immersed in the insulating liquid to achieve an electrically insulating atmosphere.
[0007] Preferably, the inverter module is connected to the high-voltage side of the transformer through a first copper sheet, and the low-voltage side of the transformer is connected to the rectifier module through a second copper sheet; the DC end of the inverter module is connected to the terminal of the DC high-voltage end through a third copper sheet, and the DC end of the rectifier module is connected to the terminal of the DC low-voltage end through a fourth copper sheet.
[0008] Preferably, a resonant capacitor is connected in series between the inverter module and the transformer.
[0009] Preferably, the inverter module, the transformer and the rectifier module are installed horizontally and closely in sequence inside the insulating sealed shell, or installed vertically and closely in sequence inside the insulating sealed shell according to the shape of the insulating sealed shell.
[0010] Preferably, an insulating liquid inlet and an insulating liquid outlet are provided on the insulating sealed shell, the insulating liquid inlet is used to pass the low-temperature insulating liquid cooled by the external circulation cooling system into the insulating sealed shell, and the insulating liquid outlet is used to discharge the heated insulating liquid from the insulating sealed shell and transport it to the external circulation cooling system for heat exchange and cooling, so as to provide an electrically insulating atmosphere for the inside of the insulating sealed shell through the circulation of the insulating liquid, and cool the high-voltage power conversion module at the same time.
[0011] Preferably, the high-voltage electric energy conversion module further includes an insulating liquid circulation component, which includes: an inverter liquid cooling plate, a rectifier liquid cooling plate and pipelines; the inverter module is fixedly mounted on the inverter liquid cooling plate, and the rectifier module is fixedly mounted on the rectifier liquid cooling plate; The insulating liquid inlet is connected to the inlet end of the inverter liquid cooling plate through a pipeline, the outlet end of the inverter liquid cooling plate is connected to the inlet end of the rectifier liquid cooling plate through a pipeline, and the outlet end of the rectifier liquid cooling plate is connected to the inside of the insulating sealed shell through a pipeline.
[0012] Preferably, the inverter liquid cooling plate and the rectifier liquid cooling plate are both fixedly mounted on the bottom surface inside the insulating sealed housing through an insulating mounting bracket.
[0013] Preferably, the insulating liquid is transformer oil, silicone oil, or liquid fluoride medium.
[0014] Preferably, the DC high voltage terminal and the insulating sealed housing, as well as the DC low voltage terminal and the insulating sealed housing are sealed by sealing rings.
[0015] It can be seen from the above technical scheme that the high-voltage electric energy conversion module provided in the embodiment of the present invention includes an insulating sealed housing, an inverter module, a transformer and a rectifier module. The inverter module, the transformer and the rectifier module are all installed inside the insulating sealed housing. The DC end of the inverter module is led out from one end of the sealed housing as a DC high-voltage end, the AC end is connected to the high-voltage coil of the transformer, the low-voltage coil of the transformer is connected to the AC end of the rectifier module, and the DC end of the rectifier module is led out from the other end of the insulating sealed housing as a DC low-voltage end. The inside of the insulating sealed housing is filled with insulating liquid, which can provide an electrically insulating atmosphere inside the insulating sealed housing. It can be seen that in this scheme, the inverter module, the transformer and the rectifier module are no longer independently packaged from each other, but are simultaneously arranged inside an insulating housing. The inverter module, the transformer, the rectifier module and the conductive connector inside the insulating housing are insulated by being completely immersed in the insulating liquid. Since the insulating performance of the insulating liquid is much greater than the insulating performance of the air, the insulation requirements of the high-voltage live part and the low-voltage part can be guaranteed, that is, the insulation distance between the inverter module and the rectifier module can be greatly reduced. Therefore, by placing the inverter module, transformer and rectifier module in the same insulating sealed housing, not only can the insulation isolation requirements be met, but also the volume of the entire device can be greatly reduced. In addition, by placing the inverter module, transformer and rectifier module in the same insulating sealed housing, the inverter module, transformer and rectifier module no longer need to be connected with long wires to meet the air insulation distance requirements, thereby avoiding energy loss on the wires, reducing costs and helping to improve the efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the circuit principle of the existing power electronic module.
[0017] Figure 2 A schematic diagram of module connections of an existing power electronic module.
[0018] Figure 3 A schematic diagram showing one perspective of the internal structure of a high-voltage power conversion module provided in an embodiment of the present invention.
[0019] Figure 4 A schematic diagram of the external structure of a high-voltage electric energy conversion module provided in an embodiment of the present invention.
[0020] Figure 5 A schematic diagram showing another perspective of the interior of a high-voltage power conversion module provided in an embodiment of the present invention.
[0021] Figure 6 A cross-sectional view from the front perspective of a high-voltage power conversion module provided in an embodiment of the present invention.
[0022] Figure 7A schematic diagram of an insulating liquid circulation assembly provided in an embodiment of the present invention.
[0023] In the figure: high-frequency inverter module 01, isolation transformer 02, high-frequency rectifier module 03, wire 04, insulating sealed shell 1, inverter module 2, transformer 3, high-voltage coil 301, low-voltage coil 302, rectifier module 4, insulating liquid circulation component 5, inverter liquid cooling plate 501, rectifier liquid cooling plate 502, pipeline 503, DC high-voltage terminal 6, DC low-voltage terminal 7, first copper sheet 8, second copper sheet 9, third copper sheet 10, fourth copper sheet 11, resonant capacitor 12, insulating liquid inlet 13, insulating liquid outlet 14, insulating mounting bracket 15. DETAILED DESCRIPTION
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0025] like Figure 3-7 As shown, an embodiment of the present invention provides a high-voltage electric energy conversion module, which includes: an insulating sealed shell 1, an inverter module 2, a transformer 3 and a rectifier module 4; the inverter module 2, the transformer 3 and the rectifier module 4 are all installed inside the insulating sealed shell 1, the DC end of the inverter module 2 is led out from one end of the insulating sealed shell 1 as a DC high-voltage end 6, the AC end of the inverter module 2 is connected to the high-voltage coil 301 of the transformer 3 through a conductive connector, the low-voltage coil 302 of the transformer 3 is connected to the AC end of the rectifier module 4 through a conductive connector, and the DC end of the rectifier module 4 is led out from the other end of the insulating sealed shell 1 as a DC low-voltage end 7; the insulating sealed shell 1 is filled with insulating liquid, so that the inverter module 2, the transformer 3, the rectifier module 4 and the conductive connector arranged inside the insulating sealed shell 1 are completely immersed in the insulating liquid to achieve an electrically insulating atmosphere.
[0026] In the existing scheme, the inverter module 2, the transformer 3 and the rectifier module 4 are independent, and the middle is connected to the transformer 3 by a connecting wire. The inverter module 2 and the rectifier module 4 are both air-insulated, and the high-voltage part and the low-voltage part must maintain a sufficient insulation distance, resulting in a large volume of the entire power electronic module. In this embodiment, the inverter module 2, the transformer 3 and the rectifier module 4 are no longer independent of each other, but are simultaneously arranged inside an insulating shell, and the inside of the insulating shell is insulated by an insulating liquid. Since the insulating performance of the insulating liquid is much greater than the insulating performance of the air, the insulation requirements of the high-voltage live part and the low-voltage part can be guaranteed, that is, the insulation distance of the inverter module 2 and the rectifier module 4 can be greatly reduced. At the same time, the inverter module 2, the transformer 3 and the rectifier module 4 are arranged in the same insulating sealed shell 1. Since the insulation distance of the insulating liquid is much smaller than the insulation distance of the air, it can not only meet the insulation isolation requirements, but also greatly reduce the volume of the power electronic module.
[0027] In addition, in the existing scheme, since the inverter module 2, the transformer 3 and the rectifier module 4 need to maintain a sufficient insulation distance, they need to be connected through a very long connecting wire. The transformer 3 has a high-frequency input and output, and the wires connecting the inverter module 2 and the transformer 3, as well as the wires connecting the rectifier module 4 and the transformer 3 flow high-frequency and large currents. Affected by the skin effect and the proximity effect, the loss generated on the connecting wires is very large, resulting in large power loss, reduced system efficiency, and increased costs. In this embodiment, by arranging the inverter module 2, the transformer 3 and the rectifier module 4 inside the same insulating sealed housing 1, and providing an insulating environment through an insulating liquid, long wires are no longer needed to connect the inverter module 2, the transformer 3 and the rectifier module 4. That is, the connection distance between the parts is greatly reduced, avoiding a large amount of loss on the wires, thereby improving the efficiency of the device and reducing costs.
[0028] In this embodiment, the insulating sealed housing 1 can be made of a resin with a certain elasticity, such as epoxy resin, and the housing itself is electrically insulating. When in use, the insulating sealed housing 1 is filled with insulating liquid to provide an electrically insulating atmosphere. In addition, in the existing solution, since the connection between the modules is exposed in space, corrosion is easily generated at the connection position. However, in this solution, by immersing each module in the insulating liquid, the connection between the modules is isolated from the air, which can avoid corrosion at the connection position.
[0029] The insulating liquid can be transformer 3 oil, silicone oil, liquid fluoride and other media. The inverter module 2, transformer 3 and rectifier module 4 are all immersed in the liquid. The heat absorption and heat transfer capabilities of the liquid are much better than those of the air. The product has good heat dissipation conditions, which helps to increase the service life of components.
[0030] When the inverter module 2, transformer 3 and rectifier module 4 are installed in the insulating sealed housing 1, they can be installed horizontally or vertically in sequence according to the shape of the insulating sealed housing 1. The transformer 3 is in the middle, and the inverter module 2 and rectifier module 4 are on both sides of the transformer 3 horizontally or vertically, and the inverter module 2 and the rectifier module 4 are separated by the transformer 3. For example, according to the needs of the actual application environment, the entire device needs to be made into a tall and narrow shape, then the corresponding insulating sealed housing 1 can be a tall and narrow housing structure, and the inverter module 2, transformer 3 and rectifier module 4 inside the housing are fixedly installed vertically up and down in sequence. For another example, according to the needs of the actual application environment, the entire device needs to be made into a long and short shape, then the corresponding insulating sealed housing 1 can be designed and made into a long and short housing structure, and the inverter module 2, transformer 3 and rectifier module 4 inside the housing are fixedly installed horizontally on both sides in sequence.
[0031] The inverter module 2, the transformer 3 and the rectifier module 4 can be connected by a wire of a certain length. In addition, in one embodiment, in order to further reduce the wire loss, the inverter module 2 and the high-voltage side of the transformer 3 can be directly connected through the first copper sheet 8, and the low-voltage side of the transformer 3 and the rectifier module 4 can be directly connected through the second copper sheet 9; the DC end of the inverter module 2 can be directly connected to the terminal of the DC high-voltage end 6 through the third copper sheet 10, and the DC end of the rectifier module 4 can be directly connected to the terminal of the DC low-voltage end 7 through the fourth copper sheet 11. In this way, the connecting wire is no longer used in this embodiment, which not only saves the use of long wires, reduces the transmission distance of high-frequency and large currents, reduces the energy loss on the wires, and saves non-ferrous metals. Moreover, the connection uses copper sheets, and the loss of the copper sheets is smaller, which helps to further reduce the loss.
[0032] In addition, in this embodiment, the high-voltage charged body, the low-voltage charged body and the ground are no longer insulated by air, but by insulating liquid. The insulation distance is several orders of magnitude smaller than the air insulation distance, which helps to greatly save space, improve space utilization, and reduce the volume of the entire power module.
[0033] In one embodiment, a resonant capacitor 12 may be connected in series between the inverter module 2 and the transformer 3, so that the resonant capacitor 12 and the transformer 3 winding form an LCC resonant circuit, allowing the IGBT or SiC device to be turned on and off at zero voltage and zero current, thereby greatly reducing the loss generated when the IGBT or SiC device is turned on and off.
[0034] In one embodiment, it is considered to introduce the insulating liquid into the insulating sealed shell in the form of a coolant to provide an electrically insulating atmosphere while cooling down the various components of the high-voltage power conversion module. Specifically, an insulating liquid inlet 13 and an insulating liquid outlet 14 are provided on the insulating sealed shell 1, and the insulating liquid inlet 13 is used to introduce the low-temperature insulating liquid cooled by the external circulation cooling system into the insulating sealed shell 1, and the insulating liquid outlet 14 is used to discharge the heated insulating liquid from the insulating sealed shell 1 and transport it to the external circulation cooling system for heat exchange and cooling, so as to provide an electrically insulating atmosphere for the inside of the insulating sealed shell through the circulation of the insulating liquid, and cool down the various components inside the high-voltage power conversion module.
[0035] In practice, the inverter module 2 and the rectifier include power semiconductor switching devices, which are most likely to be damaged by heat. Therefore, in one embodiment, in order to further improve the cooling efficiency and extend the service life of the device, it is considered to first cool down the power semiconductor device by setting an insulating liquid circulation component 5. Specifically, the insulating liquid circulation component 5 may include: an inverter liquid cooling plate 501, a rectifier liquid cooling plate 502 and a pipeline 503; the inverter module 2 is fixedly mounted on the inverter liquid cooling plate 501, and the rectifier module 4 is fixedly mounted on the rectifier liquid cooling plate 502; the insulating liquid inlet 13 is connected to the inlet end of the inverter liquid cooling plate 501 through the pipeline 503, the outlet end of the inverter liquid cooling plate 501 is connected to the inlet end of the rectifier liquid cooling plate 502 through the pipeline 503, and the outlet end of the rectifier liquid cooling plate 502 is connected to the inside of the insulating sealed shell 1 through the pipeline 503. After the low-temperature insulating liquid enters the shell, it first enters the inverter liquid cooling plate 501 and the rectifier liquid cooling plate 502 to cool the power semiconductor switch devices of the inverter module 2 installed on the inverter liquid cooling plate 501 and the power semiconductor switch devices of the rectifier module 4 installed on the rectifier liquid cooling plate 502, and then enters the inner circulation of the insulating sealed shell 1 to cool the transformer 3 and other devices. In this way, since the temperature of the insulating liquid just entering the inner part of the insulating sealed shell 1 is the lowest and the cooling effect is the best, it is considered to first use the insulating liquid at this time to cool the power semiconductor switch devices that are most likely to heat up, so as to maximize the cooling efficiency of the entire device and ensure that the components of the entire device can have a longer service life.
[0036] The insulating liquid inlet 13 and the insulating liquid outlet 14 are connected to the circulating cooling system of the entire system outside the shell. Through the circulating cooling system, the low-temperature insulating liquid flows into the shell, and the high-temperature insulating liquid flows out of the shell, taking away the heat generated by the modules inside the insulating sealed shell 1 and the transformer 3. The heat is cooled in the air heat exchanger of the circulating cooling system, and is converted into a low-temperature insulating liquid and then introduced into the insulating sealed shell 1 again, thus forming a cycle.
[0037] For pipeline 503, it is also possible to consider setting redundancy for the pipeline between the insulating liquid inlet 13 and the inverter liquid cooling plate 501, such as making a circle; and consider making a circle on the pipeline between the inverter liquid cooling plate 501 and the rectifier liquid cooling plate 502. This can reduce the stress of pipeline 503 inside the insulating sealed shell 1, and avoid deformation and damage of the pipeline due to factors such as shaking of the device and impact of the insulating liquid inside the insulating sealed shell 1 on the pipeline 503.
[0038] In addition, in one embodiment, a uniform liquid separation chamber may be considered to be provided at the outlet end of the pipeline 503 for transporting insulating liquid to the inside of the insulating sealed shell 1. A plurality of liquid outlet holes are uniformly opened in the same direction on the uniform liquid separation chamber, and the liquid outlet holes are oriented in the direction of the insulating liquid outlet. In this way, a relatively stable electrical insulation distribution field can be formed inside the insulating sealed shell 1, reducing the occurrence of large changes in the electrical insulation field due to factors such as device shaking, ensuring the stability of the electrical insulation atmosphere, and thereby improving the reliability of the device.
[0039] In addition, by evenly arranging a number of liquid outlet holes, the insulating liquid can flow in a directional and stable manner. In this way, when bubbles are generated in the insulating liquid inside the insulating sealed shell 1 due to vehicle shaking, geological disasters, etc., the bubbles can be discharged in time through directional and stable flow, thereby avoiding the presence of bubbles affecting the distribution of the electrical insulation field inside the insulating sealed shell 1 and affecting the insulation performance between modules.
[0040] In one embodiment, the transformer 3 is fixedly mounted on the ground inside the insulating sealed housing 1, and the inverter liquid cooling plate 501 and the rectifier liquid cooling plate 502 are both fixedly mounted on the bottom surface inside the insulating sealed housing 1 through the insulating mounting bracket 15. Since the bottom surface of the insulating sealed housing 1 is made of an electrically insulating material, it is possible to ensure good insulation between the modules.
[0041] In addition, the DC high voltage terminal 6 and the insulating sealed housing 1, as well as the DC low voltage terminal 7 and the insulating sealed housing 1 are sealed by sealing rings to avoid leakage of insulating liquid, etc. At the same time, the necessary components inside the insulating sealed housing 1 and the electrical connection positions should be sealed to ensure the normal operation of the components and avoid poor contact at the electrical connection positions.
[0042] In addition, a strong current interface, a control power interface and an optical fiber interface etc. can also be provided on the insulating sealed housing 1. The present invention can also reduce the insulation requirements of the transformer 3 and be used alone as an isolated DCDC module in scenes such as photovoltaic power generation and data centers.
[0043] The modules or units in the device of the embodiment of the present invention can be combined, divided and deleted according to actual needs. The above disclosure is only the preferred embodiment of the present invention, and of course it cannot be used to limit the scope of the rights of the present invention. Those skilled in the art can understand that all or part of the processes of the above embodiment are implemented, and the equivalent changes made according to the claims of the present invention still fall within the scope of the invention.
Claims
1. A high voltage power conversion module, characterized in that: include: An insulating sealed shell, an inverter module, a transformer and a rectifier module; the inverter module, the transformer and the rectifier module are all installed inside the insulating sealed shell, the DC end of the inverter module is led out from one end of the insulating sealed shell as a DC high-voltage end, the AC end of the inverter module is connected to the high-voltage coil of the transformer through a conductive connector, the low-voltage coil of the transformer is connected to the AC end of the rectifier module through a conductive connector, and the DC end of the rectifier module is led out from the other end of the insulating sealed shell as a DC low-voltage end; the interior of the insulating sealed shell is filled with insulating liquid, so that the inverter module, transformer, rectifier module and conductive connectors arranged inside the insulating sealed shell are completely immersed in the insulating liquid to achieve an electrically insulating atmosphere.
2. The high voltage power conversion module according to claim 1, characterized in that: The inverter module is connected to the high-voltage side of the transformer through a first copper sheet, and the low-voltage side of the transformer is connected to the rectifier module through a second copper sheet; the DC end of the inverter module is connected to the terminal of the DC high-voltage end through a third copper sheet, and the DC end of the rectifier module is connected to the terminal of the DC low-voltage end through a fourth copper sheet.
3. The high voltage power conversion module according to claim 2, characterized in that: A resonant capacitor is connected in series between the inverter module and the transformer.
4. The high voltage power conversion module according to claim 1, characterized in that: The inverter module, transformer and rectifier module are installed horizontally or vertically in sequence in the insulating sealed housing according to the shape of the insulating sealed housing.
5. The high voltage power conversion module according to claim 1, characterized in that: An insulating liquid inlet and an insulating liquid outlet are provided on the insulating sealed shell. The insulating liquid inlet is used to pass the low-temperature insulating liquid cooled by the external circulation cooling system into the insulating sealed shell, and the insulating liquid outlet is used to discharge the heated insulating liquid from the insulating sealed shell and transport it to the external circulation cooling system for heat exchange and cooling, so as to provide an electrically insulating atmosphere for the inside of the insulating sealed shell through the circulation of the insulating liquid, and cool the high-voltage power conversion module at the same time.
6. The high voltage power conversion module according to claim 5, characterized in that: The high-voltage electric energy conversion module also includes an insulating liquid circulation component, which includes: an inverter liquid cooling plate, a rectifier liquid cooling plate and pipelines; the inverter module is fixedly mounted on the inverter liquid cooling plate, and the rectifier module is fixedly mounted on the rectifier liquid cooling plate; The insulating liquid inlet is connected to the inlet end of the inverter liquid cooling plate through a pipeline, the outlet end of the inverter liquid cooling plate is connected to the inlet end of the rectifier liquid cooling plate through a pipeline, and the outlet end of the rectifier liquid cooling plate is connected to the inside of the insulating sealed shell through a pipeline.
7. The high voltage power conversion module according to claim 6, characterized in that: The inverter liquid cooling plate and the rectifier liquid cooling plate are both fixedly mounted on the bottom surface inside the insulating sealed housing through an insulating mounting bracket.
8. The high voltage power conversion module according to claim 1, characterized in that: The insulating liquid is transformer oil, silicone oil, or liquid fluoride medium.
9. The high voltage power conversion module according to claim 1, characterized in that: The DC high voltage end and the insulating sealed shell are sealed by sealing rings, as are the DC low voltage end and the insulating sealed shell.