Power conversion devices and power supply equipment

Abstract

This utility model relates to the field of underwater power supply system technology, and provides a power conversion device and power supply equipment. In the power conversion device, a base and a cover are fastened together to form a shell, and a primary voltage regulator module and a secondary voltage regulator module are respectively attached to the inner wall of the base and the inner wall of the cover. A heat insulation space is formed between the primary voltage regulator module and the secondary voltage regulator module. By attaching the primary voltage regulator module, which generates the most heat, and the temperature-sensitive secondary voltage regulator module to the inner wall of the base and the inner wall of the cover respectively, independent heat dissipation can be achieved using the base and the cover, effectively improving the overall heat dissipation efficiency of the device. At the same time, the heat insulation space formed between the two modules reduces direct heat conduction between the modules, reduces thermal interference between the heat-generating module and the temperature-sensitive module, alleviates the problem of heat accumulation and rapid temperature rise inside the device in the deep-sea confined environment, slows down the aging rate of the components, and thus improves the stability and service life of the power conversion device in the deep-sea environment.

Description

Technical Field

[0001] This utility model relates to the field of underwater power supply system technology, and in particular to an energy conversion device and power supply equipment. Background Technology

[0002] Currently, the demand for miniaturized and integrated seabed online monitoring systems in the marine observation field is increasing. Constant current power supply has become the mainstream power supply solution for seabed observation networks due to its advantages such as high robustness, stable long-distance transmission, and strong resistance to short-circuit and open-circuit faults. In the deep-sea environment, constant current to constant voltage power conversion devices are typically installed in sealed pressure chambers, which presents problems such as poor heat dissipation, easy accumulation of internal heat, and thermal interference between major heat-generating components and temperature-sensitive circuits. This leads to increased internal temperature, accelerated aging of components, and seriously affects the long-term operational stability and service life of the device. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an energy conversion device and a power supply equipment.

[0004] In a first aspect, this utility model provides an electrical energy conversion device, comprising: a base, a cover, a primary voltage regulator module, and a secondary voltage regulator module.

[0005] The base and the cover are fastened together, the primary voltage regulator module is attached to the inner wall of the base, the secondary voltage regulator module is attached to the inner wall of the cover, and there is a heat insulation space between the primary voltage regulator module and the secondary voltage regulator module.

[0006] According to the present invention, an energy conversion device is provided, the energy conversion device further includes a side plate; the side plate surrounds and connects between the base and the cover, and together with the base and the cover, forms a closed cavity, and the side plate is provided with a connection terminal.

[0007] According to the present invention, the base and the cover are both made of aluminum alloy.

[0008] According to the present invention, an electrical energy conversion device is provided, which further includes a first phase change thermal conductive pad.

[0009] The first phase change thermal pad is disposed between the cover and the secondary voltage regulator module.

[0010] According to the present invention, an energy conversion device is provided, which further includes an inner frame mounting plate, a second phase change thermal pad, and a third phase change thermal pad.

[0011] The base is fitted and fixed to the inner frame mounting plate.

[0012] The second phase change thermal pad is disposed between the base and the inner frame mounting plate.

[0013] The third phase change thermal pad is disposed between the base and the primary voltage regulator module.

[0014] According to the present invention, the power conversion device includes a primary voltage regulator module comprising a primary voltage regulator printed circuit board and a series-parallel array of low threshold voltage reference units.

[0015] The primary voltage regulator printed circuit board is connected to the series-parallel array of the low threshold voltage reference unit, and the series-parallel array of the low threshold voltage reference unit is attached to the base.

[0016] According to the present invention, the low threshold voltage reference unit series-parallel array includes multiple series voltage regulation branches, and each of the series voltage regulation branches is connected in parallel with each other.

[0017] The series-connected voltage regulator branch includes multiple low-threshold voltage reference units connected in series.

[0018] According to the present invention, the power conversion device includes a secondary voltage regulator module comprising a secondary voltage regulator printed circuit board and a multi-channel isolated DC-DC voltage regulator circuit.

[0019] The input terminals of each isolated DC-DC voltage regulator circuit are connected in parallel and are all electrically connected to the output terminal of the primary voltage regulator module. The output terminals of each isolated DC-DC voltage regulator circuit are independent and are used to output multiple constant voltages of different levels. Each isolated DC-DC voltage regulator circuit is attached to the inner wall of the cover.

[0020] The primary voltage regulator printed circuit board and the secondary voltage regulator printed circuit board are connected by a fixing post, and there is a heat insulation space between the primary voltage regulator printed circuit board and the secondary voltage regulator printed circuit board.

[0021] According to the present invention, an energy conversion device is provided, which further includes a sampling circuit and a control circuit.

[0022] The sampling terminal of the sampling circuit is connected to the input terminal and output terminal of the primary voltage regulator module and the output terminal of the secondary voltage regulator module, respectively, and the output terminal of the sampling circuit is connected to the input terminal of the control circuit.

[0023] The output terminal of the control circuit is connected to the control and protection terminals of the primary voltage regulator module and the secondary voltage regulator module, respectively, and is used to monitor the device status and trigger protection actions based on the sampling signal.

[0024] Both the sampling circuit and the control circuit are integrated on the secondary voltage regulator printed circuit board.

[0025] A second aspect of this utility model is to provide a power supply device, including the power conversion device as described above.

[0026] The power conversion device provided by this utility model includes a base, a cover, a primary voltage regulator module, and a secondary voltage regulator module. The base and cover are fastened together to form a housing. The primary voltage regulator module, which is the main heat-generating component, is fitted against the inner wall of the base, while the temperature-sensitive secondary voltage regulator module is fitted against the inner wall of the cover. This allows for independent heat dissipation for both the primary and secondary voltage regulator modules using the base and cover. A heat-insulating space is formed between the primary and secondary voltage regulator modules, meaning they are spaced apart. This space reduces direct heat conduction between the two modules, minimizing the thermal impact of the heat-generating module on the temperature-sensitive module.

[0027] Therefore, by attaching the primary voltage regulator module, which generates the most heat, and the secondary voltage regulator module, which is sensitive to temperature, to the inner wall of the base and the inner wall of the cover respectively, two independent heat dissipation paths can be achieved using the base and the cover. This effectively improves the overall heat dissipation efficiency of the device. At the same time, the thermal insulation space formed between the two modules reduces direct heat conduction between the modules, reduces thermal interference between the heat-generating module and the temperature-sensitive module, alleviates the problem of heat accumulation and rapid temperature rise inside the device in the deep-sea sealed environment, slows down the aging of the components, and thus improves the stability and service life of the power conversion device in the deep-sea environment during long-term operation.

[0028] Furthermore, the power supply equipment provided by this utility model, since it includes the power conversion device as described above, also possesses the advantages described above. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is an overall topology diagram of the power conversion device provided by this utility model.

[0031] Figure 2 This is a circuit topology diagram of the primary voltage regulator module in the power conversion device provided by this utility model.

[0032] Figure 3 This is a circuit topology diagram of the secondary voltage regulator module in the power conversion device provided by this utility model.

[0033] Figure 4This is a simplified structural diagram of the power conversion device provided by this utility model;

[0034] Figure 5 This is a circuit topology diagram of the primary voltage regulator module in the power conversion device provided by this utility model, where a diode array is used.

[0035] Figure 6 This is a circuit topology diagram of the primary voltage regulator module in the power conversion device provided by this utility model, where a voltage regulator array is used.

[0036] Reference numerals: 110, base; 120, cover; 130, inner frame mounting plate; 140, first phase change thermal pad; 150, second phase change thermal pad; 160, third phase change thermal pad; 200, primary voltage regulator module; 210, primary voltage regulator printed circuit board; 220, low threshold voltage reference unit; 300, secondary voltage regulator module; 310, secondary voltage regulator printed circuit board; 320, isolated DC-DC voltage regulator circuit; 400, sampling circuit; 500, control circuit. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] The specific terms used in this specification are for illustrative purposes only and are not intended to limit the illustrated embodiments. For example, expressions such as "same" and "identical" not only indicate a strictly identical state, but also indicate a state with tolerances or differences in the degree of functionality. For example, expressions indicating relative or absolute arrangement such as "in a certain direction," "along a certain direction," "side by side," "perpendicular," "centered on," "concentric," or "coaxial" not only strictly indicate such an arrangement, but also indicate a state of relative displacement by tolerances or angles or distances with the same degree of functionality.

[0039] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, B1 and / or B2 can represent: B1 existing alone, B1 and B2 existing simultaneously, and B2 existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The following is combined Figures 1 to 6 This invention describes an energy conversion device and power supply equipment provided in an embodiment of the present invention. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0043] An embodiment of the first aspect of this utility model provides an electrical energy conversion device, such as... Figure 4 As shown, it includes: a base 110, a cover 120, a primary voltage regulator module 200, and a secondary voltage regulator module 300.

[0044] The base 110 and the cover 120 are fastened together, the primary voltage regulator module 200 is attached to the inner wall of the base 110, and the secondary voltage regulator module 300 is attached to the inner wall of the cover 120. There is a heat insulation space between the primary voltage regulator module 200 and the secondary voltage regulator module 300.

[0045] In other words, the power conversion device provided by this utility model includes a base 110, a cover 120, a primary voltage regulator module 200, and a secondary voltage regulator module 300. The base 110 and cover 120 are fastened together to form a housing. The primary voltage regulator module 200, which is the main heat-generating component, is fitted against the inner wall of the base 110, and the temperature-sensitive secondary voltage regulator module 300 is fitted against the inner wall of the cover 120. This allows for independent heat dissipation for both the primary and secondary voltage regulator modules 200 and 300, respectively, using the base 110 and cover 120. A heat-insulating space is formed between the primary and secondary voltage regulator modules 200, meaning they are spaced apart. This space reduces direct heat conduction between the two modules, minimizing the thermal impact of the heat-generating module on the temperature-sensitive module.

[0046] Therefore, by attaching the primary voltage regulator module 200, which generates the most heat, and the secondary voltage regulator module 300, which is sensitive to temperature, to the inner wall of the base 110 and the inner wall of the cover 120 respectively, two independent heat dissipation paths can be achieved using the base 110 and the cover 120, effectively improving the overall heat dissipation efficiency of the device. At the same time, the heat insulation space formed between the two modules reduces direct heat conduction between the modules, reduces thermal interference of the heat-generating module to the temperature-sensitive module, alleviates the problem of heat accumulation and rapid temperature rise inside the device in the deep-sea closed environment, slows down the aging rate of the components, and thus improves the stability and service life of the power conversion device in the deep-sea environment during long-term operation.

[0047] In one embodiment of this utility model, the power conversion device further includes a side plate.

[0048] The side plate surrounds and connects the base 110 and the cover 120, and together with the base 110 and the cover 120, they form a closed cavity. The side plate is provided with connection terminals.

[0049] In one embodiment of this utility model, both the base 110 and the cover 120 are made of aluminum alloy.

[0050] In other words, the power conversion device also features a side plate that encloses and connects the base 110 and the cover 120, forming a closed cavity together with the base 110 and the cover 120. This creates a sealed structure suitable for use in deep-sea, pressurized environments, effectively preventing external seawater and impurities from entering the device and ensuring stable and reliable operation of the internal circuitry. The side plate is equipped with connection terminals for electrical connection between the internal circuitry and external power supply busbars and load devices, facilitating wiring and expansion. Furthermore, both the base 110 and the cover 120 are made of aluminum alloy, which has excellent thermal conductivity and structural strength, enabling rapid dissipation of heat generated by the primary voltage regulator module 200 and the secondary voltage regulator module 300.

[0051] In one embodiment of this utility model, the power conversion device further includes a first phase change thermal pad 140. The first phase change thermal pad 140 is disposed between the cover 120 and the secondary voltage regulator module 300.

[0052] Furthermore, in one embodiment of this utility model, the power conversion device further includes an inner frame mounting plate 130, a second phase change thermal pad 150, and a third phase change thermal pad 160; the base 110 is attached and fixed to the inner frame mounting plate 130; the second phase change thermal pad 150 is disposed between the base 110 and the inner frame mounting plate 130; and the third phase change thermal pad 160 is disposed between the base 110 and the primary voltage regulator module 200.

[0053] like Figure 4 As shown, the first phase change thermal pad 140 is disposed between the cover 120 and the secondary voltage regulator module 300 to fill the contact gap between the cover 120 and the secondary voltage regulator module 300, reduce the interface thermal resistance, and enable the heat generated by the secondary voltage regulator module 300 to be efficiently conducted to the cover 120 for heat dissipation.

[0054] The power conversion device also includes an inner frame mounting plate 130, a second phase change thermal pad 150, and a third phase change thermal pad 160. The base 110 is fitted and fixed to the inner frame mounting plate 130, achieving overall installation and fixation of the device. The second phase change thermal pad 150 is disposed between the base 110 and the inner frame mounting plate 130 to further conduct heat from the base 110 to the inner frame mounting plate 130, increasing the heat dissipation area. The third phase change thermal pad 160 is disposed between the base 110 and the primary voltage regulator module 200 to fill the contact gap between them, reducing interface thermal resistance and enabling efficient heat conduction from the primary voltage regulator module 200 to the base 110, thus improving the heat dissipation efficiency of the primary voltage regulator module 200.

[0055] In one embodiment of the present invention, the primary voltage regulator module 200 includes a primary voltage regulator printed circuit board 210 and a series-parallel array of low threshold voltage reference units 220.

[0056] The primary voltage regulator printed circuit board 210 is connected in series and parallel array with the low threshold voltage reference unit 220, and the low threshold voltage reference unit 220 in series and parallel array is attached to the base 110.

[0057] In one embodiment of the present invention, the series-parallel array of low threshold voltage reference units 220 includes multiple series voltage regulation branches, and each series voltage regulation branch is connected in parallel with each other; the series voltage regulation branch includes multiple low threshold voltage reference units 220 connected in series with each other.

[0058] In one embodiment of the present invention, the secondary voltage regulator module 300 includes a secondary voltage regulator printed circuit board 310 and a multi-channel isolated DC-DC voltage regulator circuit 320.

[0059] The input terminals of each isolated DC-DC voltage regulator circuit 320 are connected in parallel and are all electrically connected to the output terminal of the primary voltage regulator module 200. The output terminals of each isolated DC-DC voltage regulator circuit 320 are independent and are used to output multiple constant voltages of different levels. Each isolated DC-DC voltage regulator circuit 320 is attached to the inner wall of the cover 120.

[0060] The primary voltage regulator printed circuit board 210 and the secondary voltage regulator printed circuit board 310 are connected by a fixing post, and there is a heat insulation space between the primary voltage regulator printed circuit board 210 and the secondary voltage regulator printed circuit board 310.

[0061] Furthermore, in one embodiment of this utility model, the power conversion device further includes a sampling circuit 400 and a control circuit 500.

[0062] The sampling terminal of the sampling circuit 400 is connected to the input terminal and output terminal of the primary voltage regulator module 200 and the output terminal of the secondary voltage regulator module 300, respectively. The output terminal of the sampling circuit 400 is connected to the input terminal of the control circuit 500.

[0063] The output of the control circuit 500 is connected to the control and protection terminals of the primary voltage regulator module 200 and the secondary voltage regulator module 300, respectively, and is used to monitor the device status and trigger protection actions based on the sampling signal.

[0064] The sampling circuit 400 and the control circuit 500 are both integrated on the secondary voltage regulator printed circuit board 310.

[0065] Specifically, such as Figure 1 , Figure 2 and Figures 4 to 6 As shown, the primary voltage regulator module 200 includes a primary voltage regulator printed circuit board 210 and a series-parallel array of low threshold voltage reference units 220. The series-parallel array of low threshold voltage reference units 220 is electrically connected to the primary voltage regulator printed circuit board 210, and the series-parallel array of low threshold voltage reference units 220 is attached to the third phase change thermal pad 160 to efficiently conduct the heat generated during operation to the base 110 for heat dissipation. The series-parallel array of low threshold voltage reference units 220 constitutes the primary voltage-regulating constant current input circuit of this device, such as... Figure 2As shown, it is connected in series with a series-parallel array of low threshold voltage reference units 220. The series-parallel array of low threshold voltage reference units 220 includes multiple series-regulated branches, each connected in parallel. Each series-regulated branch is composed of multiple low threshold voltage reference units 220 connected in series. Because the voltage drop of the low threshold voltage reference unit 220 is low and less affected by current, by configuring the number of units and the series-parallel structure of the array, the overall voltage regulation value, current withstand capability, and voltage withstand capability can be changed to match the power consumption of different downstream loads, reduce energy loss, and improve power conversion efficiency. Figure 5 As shown, the low threshold voltage reference unit 220 series-parallel array can be a Zener diode array to form a diode array-type preliminary voltage-stabilized constant-current to constant-voltage power conversion circuit; such as Figure 6 As shown, a Zener diode array can also be used to form a Zener diode array-type preliminary voltage-stabilized constant current to constant voltage power conversion circuit to meet the voltage stabilization requirements in different application scenarios.

[0066] The secondary voltage regulator module 300 includes a secondary voltage regulator printed circuit board 310 and a multi-channel isolated DC-DC voltage regulator circuit 320, such as Figure 3 As shown, the input terminals of each isolated DC-DC regulator circuit 320 are connected in parallel and electrically connected to the output terminal of the primary regulator module 200. They receive the constant voltage output from the primary regulator module 200 and further isolate and regulate it into multiple constant voltages of different levels. Each output is independent to meet the constant voltage power supply requirements of different load devices, while simultaneously achieving electrical isolation and decoupling between the nodes and the bus in the series system. At least one isolated DC-DC regulator circuit 320 powers the control circuit 500, and at least one isolated DC-DC regulator circuit 320 powers the sampling circuit 400 and internal and external loads. This can be expanded to k independent outputs depending on the number of loads. The primary regulator module 200 is the main heat-generating component of the device. The secondary regulator module 300 is temperature-sensitive but generates relatively little heat. Each isolated DC-DC regulator circuit 320 is attached to the first phase change thermal pad 140 and achieves efficient heat dissipation through the inner wall of the cover 120. Figure 4 As shown, the primary voltage regulator printed circuit board 210 and the secondary voltage regulator printed circuit board 310 are connected by fixing posts, forming a heat-insulating space between them. This spatially separates the primary voltage regulator module 200, which generates the most heat, from the temperature-sensitive secondary voltage regulator module 300, reducing heat conduction and thermal interference. This device uses a split aluminum alloy shell combined with multiple phase-change thermal pads, resulting in lower cost, easier processing and installation, and good insulation and withstand voltage characteristics. Furthermore, multiple devices can be connected in series to expand output power and adapt to different load requirements.

[0067] like Figure 1As shown, the power conversion device also includes a sampling circuit 400 and a control circuit 500. Both the sampling circuit 400 and the control circuit 500 are integrated on the secondary voltage regulator printed circuit board 310, located on the side of the cover 120 where the temperature environment is more stable. The sampling terminal of the sampling circuit 400 is connected to the input and output terminals of the primary voltage regulator module 200 and the output terminal of the secondary voltage regulator module 300, respectively, for real-time acquisition of operating parameters such as voltage and current on the bus side, the primary voltage regulator output side, and the secondary voltage regulator output side. The output terminal of the sampling circuit 400 is connected to the input terminal of the control circuit 500, sending the sampled signal to the control circuit 500. The output terminal of the control circuit 500 is connected to the control and protection terminals of the primary voltage regulator module 200 and the secondary voltage regulator module 300, respectively, enabling real-time monitoring of the device's operating status based on the sampled signal and triggering protection actions in the event of abnormal conditions such as overvoltage, overcurrent, or overload, ensuring safe and reliable operation of the device.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrical energy conversion device, characterized in that, Includes a base (110), a cover (120), a primary voltage regulator module (200), and a secondary voltage regulator module (300); The base (110) and the cover (120) are fastened together, the primary voltage regulator module (200) is attached to the inner wall of the base (110), the secondary voltage regulator module (300) is attached to the inner wall of the cover (120), and there is a heat insulation space between the primary voltage regulator module (200) and the secondary voltage regulator module (300).

2. The power conversion device according to claim 1, characterized in that, The power conversion device also includes a side plate; The side plate surrounds and connects the base (110) and the cover (120), and together with the base (110) and the cover (120), forms a closed cavity. The side plate is provided with a connection terminal.

3. The power conversion device according to claim 2, characterized in that, Both the base (110) and the cover (120) are made of aluminum alloy.

4. The power conversion device according to claim 1, characterized in that, The power conversion device also includes a first phase change thermal pad (140). The first phase change thermal pad (140) is disposed between the cover (120) and the secondary voltage regulator module (300).

5. The power conversion device according to claim 1, characterized in that, The power conversion device also includes an inner frame mounting plate (130), a second phase change thermal pad (150), and a third phase change thermal pad (160). The base (110) is attached and fixed to the inner frame mounting plate (130). The second phase change thermal pad (150) is disposed between the base (110) and the inner frame mounting plate (130); The third phase change thermal pad (160) is disposed between the base (110) and the primary voltage regulator module (200).

6. The power conversion device according to any one of claims 1 to 5, characterized in that, The primary voltage regulator module (200) includes a primary voltage regulator printed circuit board (210) and a series-parallel array of low threshold voltage reference units (220); The primary voltage regulator printed circuit board (210) is connected in series and parallel array with the low threshold voltage reference unit (220), and the low threshold voltage reference unit (220) in series and parallel array is attached to the base (110).

7. The power conversion device according to claim 6, characterized in that, The low threshold voltage reference unit (220) series-parallel array includes multiple series voltage regulation branches, and each series voltage regulation branch is connected in parallel with each other; The series-connected voltage regulator branch includes multiple low threshold voltage reference units (220) connected in series.

8. The power conversion device according to claim 7, characterized in that, The secondary voltage regulator module (300) includes a secondary voltage regulator printed circuit board (310) and a multi-channel isolated DC-DC voltage regulator circuit (320). The input terminals of each isolated DC-DC voltage regulator circuit (320) are connected in parallel and are all electrically connected to the output terminal of the primary voltage regulator module (200). The output terminals of each isolated DC-DC voltage regulator circuit (320) are independent and are used to output multiple constant voltages of different levels. Each isolated DC-DC voltage regulator circuit (320) is attached to the inner wall of the cover (120). The primary voltage regulator printed circuit board (210) and the secondary voltage regulator printed circuit board (310) are connected by a fixing post, and there is a heat insulation space between the primary voltage regulator printed circuit board (210) and the secondary voltage regulator printed circuit board (310).

9. The power conversion device according to claim 8, characterized in that, The power conversion device also includes a sampling circuit (400) and a control circuit (500). The sampling terminal of the sampling circuit (400) is connected to the input terminal and output terminal of the primary voltage regulator module (200) and the output terminal of the secondary voltage regulator module (300), respectively. The output terminal of the sampling circuit (400) is connected to the input terminal of the control circuit (500). The output terminal of the control circuit (500) is connected to the control protection terminals of the primary voltage regulator module (200) and the secondary voltage regulator module (300) respectively, and is used to monitor the device status and trigger protection actions according to the sampling signal; The sampling circuit (400) and the control circuit (500) are both integrated on the secondary voltage regulator printed circuit board (310).

10. A power supply device, characterized in that, Includes the power conversion device as described in any one of claims 1 to 9.

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