Power converter compatible with different voltage platforms, vehicle-mounted charger and vehicle

Abstract

The utility model discloses a power converter compatible with different voltage platforms, a vehicle-mounted charger and a vehicle, and belongs to the technical field of transformers. The power converter compatible with different voltage platforms comprises a power module, an integrated transformer and a first shielding layer, the power module is connected with the integrated transformer; the integrated transformer comprises a base, a first primary winding, a second primary winding, a first secondary winding and a second secondary winding, the first primary winding, the second primary winding, the first secondary winding and the second secondary winding are wound on different magnetic columns respectively and fixedly connected to the base, and the first shielding layer is embedded into the base. The magnetic flux leakage shielding effect can be achieved by embedding the shielding layer in the middle of the base of the integrated transformer, a shielding cover occupying extra space can be omitted, and the product size is further reduced.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more particularly to power converters, on-board chargers and vehicles compatible with different voltage platforms. Background Technology

[0002] With the continuous development and improvement of electric vehicle performance, there are two types of models on the market with ordinary 400V and high-performance 800V high-voltage battery platforms. In order to be compatible with 400V and 800V high-voltage battery charging, the transformer design in the high-voltage DC / DC (DC chopper) of the OBC (Onboard Charger) needs to be optimized to make it compatible with both 400V and 800V output voltages.

[0003] One solution in related technologies is to use a transformer with integrated leakage inductance. However, since the presence of leakage inductance can affect the surrounding circuits, an additional metal shield is needed to shield the leakage magnetic field. This shield will occupy a certain amount of space. In addition, the shield will generate additional heat loss, and heat dissipation design is also required. With the trend of product miniaturization, this solution still needs to be optimized. Utility Model Content

[0004] The main objective of this application is to provide a power converter, on-board charger, and vehicle compatible with different voltage platforms, aiming to at least solve the technical problem of avoiding additional space occupation due to the addition of a shielding cover while ensuring compatibility with different voltage platforms using a transformer based on leakage inductance integration.

[0005] To achieve the above objectives, this application provides a power converter compatible with different voltage platforms, the power converter being compatible with different voltage platforms comprising: a power module, an integrated transformer, and a first shielding layer;

[0006] The power module is connected to the integrated transformer;

[0007] The integrated transformer includes a base and a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding respectively wound on different magnetic pillars. The first primary winding, the second primary winding, the first secondary winding, and the second secondary winding are respectively fixedly connected to the base, and the first shielding layer is embedded in the base.

[0008] In one embodiment, the power module includes a main power board and an adapter board, the adapter board being connected to the main power board and the integrated transformer respectively; the power converter compatible with different voltage platforms further includes:

[0009] The second shielding layer is disposed in the adapter plate.

[0010] In one embodiment, the adapter plate includes a primary-side adapter cable and a secondary-side adapter cable;

[0011] The primary-side adapter wire electrically connects the first primary winding and the second primary winding to the main power board respectively. The primary-side adapter wire also connects the first primary winding and the second primary winding in series. The secondary-side adapter wire electrically connects the first secondary winding and the second secondary winding to the main power board respectively. The secondary-side adapter wire also connects the first secondary winding and the second secondary winding in series or in parallel according to the preset output voltage of the integrated transformer.

[0012] In one embodiment, when the preset output voltage of the integrated transformer is 400V, the secondary winding connector connects the first secondary winding and the second secondary winding in parallel.

[0013] In one embodiment, when the preset output voltage of the integrated transformer is 800V, the secondary winding connector connects the first secondary winding and the second secondary winding in series.

[0014] In one embodiment, the main power board includes a first primary-side power connection point, a second primary-side power connection point, a first secondary-side power connection point, and a second secondary-side power connection point;

[0015] The first primary winding includes a first pin and a second pin, the second primary winding includes a third pin and a fourth pin, the first secondary winding includes a fifth pin and a sixth pin, and the second secondary winding includes a seventh pin and an eighth pin.

[0016] The primary-side adapter wires are respectively electrically connected to the first primary-side power connection point and the first pin, the second primary-side power connection point and the fourth pin, and the second pin and the third pin;

[0017] The secondary side adapter cable is electrically connected to the first secondary side power connection point and the fifth pin, and the second secondary side power connection point and the eighth pin, respectively;

[0018] The secondary adapter wire is electrically connected to the sixth pin and the seventh pin, or the secondary adapter wire is electrically connected to the fifth pin and the seventh pin, and the sixth pin and the eighth pin, respectively.

[0019] In one embodiment, when the preset output voltage of the integrated transformer is 400V, the secondary adapter wire is electrically connected to the fifth pin and the seventh pin, the sixth pin and the eighth pin, respectively.

[0020] In one embodiment, when the preset output voltage of the integrated transformer is 800V, the secondary adapter wire is electrically connected to the sixth pin and the seventh pin.

[0021] In addition, to achieve the above objectives, this application also provides an on-board charger, which includes a power converter compatible with different voltage platforms as described above.

[0022] In addition, to achieve the above objectives, this application also provides a vehicle that includes the on-board charger described above.

[0023] This application proposes a power converter, on-board charger, and vehicle compatible with different voltage platforms. It overcomes the drawback of related technologies where transformer optimization schemes require additional shielding, resulting in extra space occupation. The power converter compatible with different voltage platforms includes: a power module, an integrated transformer, and a first shielding layer. The power module is connected to the integrated transformer. The integrated transformer includes a base and a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding wound on different magnetic pillars. The first primary winding, the second primary winding, the first secondary winding, and the second secondary winding are fixedly connected to the base, and the first shielding layer is embedded in the base. In the power converter compatible with different voltage platforms provided in this application, leakage magnetic shielding can be achieved by embedding a shielding layer in the middle of the integrated transformer's base, eliminating the need for an additional shielding cover and further reducing product size. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the layout structure of a power converter compatible with different voltage platforms provided in an embodiment of this application;

[0026] Figure 2 A schematic diagram of another layout structure of a power converter compatible with different voltage platforms provided for an embodiment of this application;

[0027] Figure 3 A circuit diagram of a high-voltage DC / DC topology involved in a power converter compatible with different voltage platforms, provided for an embodiment of this application;

[0028] Figure 4 for Figure 3 A schematic diagram illustrating the equivalent principle of a centrally integrated transformer;

[0029] Figure 5 for Figure 4 A schematic diagram of the winding connection of a medium-sized integrated transformer;

[0030] Figure 6 for Figure 4 A schematic diagram of another winding connection for a centrally integrated transformer;

[0031] Figure 7 A schematic diagram of a module structure for a power converter compatible with different voltage platforms, provided for an embodiment of this application;

[0032] Figure 8 A wiring diagram of an adapter board for a power converter compatible with different voltage platforms provided in this application embodiment;

[0033] Figure 9 This is a wiring diagram of another adapter board involved in a power converter compatible with different voltage platforms provided in an embodiment of this application.

[0034] Explanation of icon numbers:

[0035] 10. Power module; 20. Integrated transformer; 21. Base; 30. First shielding layer; 11. Main power board; 12. Adapter board; 40. Second shielding layer; Q1 to Q4. Primary-side full-bridge switching transistors; C1. Primary-side DC blocking capacitor; T. Integrated transformer; Lr. Equivalent leakage inductance; Lm. Equivalent magnetizing inductance; n:1. Primary-secondary turns ratio; C2. Secondary-side DC blocking capacitor; Q5 to Q8. Secondary-side full-bridge switching transistors; Pri. Primary / Primary side; Sec. Secondary / Secondary side; P1. First primary winding; P2. Secondary primary winding; S1. First secondary winding;

[0036] S2, Second secondary winding; A, First primary power connection point; B, Second primary power connection point; C, First secondary power connection point; D, Second secondary power connection point; 1, First pin; 2, Second pin; 3, Third pin; 4, Fourth pin; 5, Fifth pin; 6, Sixth pin; 7, Seventh pin; 8, Eighth pin.

[0037] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B.

[0041] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] It should also be understood that references to "one embodiment" or "some embodiments" in the specification of embodiments of this application mean that one or more embodiments of this application include the specific features, structures, or characteristics described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0043] With the continuous development and improvement of electric vehicle performance, there are two types of models on the market with ordinary 400V and high-performance 800V high-voltage battery platforms. In order to be compatible with 400V and 800V high-voltage battery charging, the transformer design in the high-voltage DC / DC (DC chopper) of the OBC (Onboard Charger) needs to be optimized to make it compatible with both 400V and 800V output voltages.

[0044] One approach in related technologies is to use a transformer with integrated leakage inductance. In the trend towards product miniaturization, this solution offers advantages in terms of size and cost. However, due to the presence of integrated leakage inductance, significant leakage magnetic field interference exists between the integrated transformer and the main power board, negatively impacting the stability of the signal circuits above the transformer. This typically requires additional shielding measures to reduce the interference of the leakage magnetic field on other circuits. In other words, while the integrated transformer solution reduces the overall transformer size, the impact of leakage magnetic field on the signal control circuits above necessitates an additional metal shield to protect against the leakage magnetic field. This shield also increases the overall height, and furthermore, it generates additional heat loss, requiring heat dissipation design, which is detrimental to product miniaturization.

[0045] Based on this, this application proposes a power converter, on-board charger, and vehicle compatible with different voltage platforms, overcoming the drawback of related technologies where transformer optimization schemes require additional shielding, resulting in extra space occupation. In the power converter compatible with different voltage platforms provided in this application, leakage magnetic shielding can be achieved by embedding a shielding layer in the middle of the integrated transformer's base, eliminating the need for an additional shielding cover and further reducing product size.

[0046] The power converter, on-board charger, and vehicle compatible with different voltage platforms provided in this application are specifically described through the following embodiments. First, the power converter compatible with different voltage platforms is described.

[0047] This application provides a power converter compatible with different voltage platforms, referring to... Figure 1 , Figure 1 This is a schematic diagram of the layout structure of a power converter compatible with different voltage platforms provided in an embodiment of this application. The power converter compatible with different voltage platforms includes: a power module 10, an integrated transformer 20, and a first shielding layer 30.

[0048] Power module 10 is connected to integrated transformer 20;

[0049] The integrated transformer 20 includes a base 21 and a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding wound on different magnetic pillars. The first primary winding, the second primary winding, the first secondary winding, and the second secondary winding are fixedly connected to the base 21, and the first shielding layer 30 is embedded in the base 21.

[0050] In this embodiment, the first shielding layer 30 can be a metal shielding layer. In this embodiment, by embedding a metal shielding layer in the middle of the base 21, the base 21 not only achieves the function of fixing the winding lead (winding support), but also achieves the effect of leakage magnetic shielding. Furthermore, the base 21 can be folded to support the shielding layer and the transformer being buried together in the water-cooling cavity, so as to achieve better contact between the shielding layer and the cooling system and thus remove the heat generated on the shielding layer due to the leakage magnetic field.

[0051] Reference Figure 2 In some feasible embodiments, the power module 10 includes a main power board 11 and an adapter board 12, the adapter board 12 being connected to the main power board 11 and the integrated transformer 20 respectively; the power converter compatible with different voltage platforms may further include:

[0052] The second shielding layer 40 is disposed in the adapter plate 12.

[0053] Understandably, from a layout perspective, when the power module 10 is disassembled into a main power board 11 and an adapter board 12, the shielding effect can be enhanced by adding a second shielding layer 40 to the adapter board 12. As an example, the second shielding layer 40 in this embodiment can be a fully covered copper network. Based on the above embodiment, an additional fully covered copper network can be added to the adapter board 12 as a secondary shield to further reduce the interference of the integrated inductor leakage magnetic field on the uppermost main power board 11.

[0054] In addition, by Figure 2 As can be seen, the adapter board 12 realizes the power connection between the integrated transformer 20 and the uppermost main power board 11 through four power connection hardware parts A to D. These four power connection pins can be flexibly adjusted according to the power layout of the main power board 11, which greatly increases the flexibility of circuit layout design.

[0055] As an example, in this embodiment, the power converter compatible with different voltage platforms can be a high-voltage DC / DC converter in an OBC, referencing... Figure 3 , Figure 3This is a basic high-voltage DC / DC topology. The topology mainly includes primary-side full-bridge switches Q1 to Q4, primary-side DC blocking capacitor C1, a four-port isolation transformer T (where A to D are the power connection points between the transformer and the primary / secondary sides, Lr is the equivalent leakage inductance of the transformer, Lm is the equivalent magnetizing inductance, and the primary / secondary turns ratio is n:1), secondary-side DC blocking capacitor C2, secondary-side full-bridge switches Q5 to Q8 (both primary and secondary switches can be MOSFETs, Metal-Oxide-Semiconductor Field-Effect Transistors), output-side HVDC EMC filter capacitors, and a 400V or 800V high-voltage battery at the output. The equivalent circuit diagram of the integrated transformer T in this topology is shown below. Figure 4 As shown, the primary and secondary coils are each wound in two groups on the magnetic core. Pri (Primary) represents the transformer's input terminal, and Sec (Second) represents the transformer's output terminal. The traditional winding method for 400V and 800V transformers is as follows: Connect pins 2 to 3 on the primary side, with pins 1 and 4 as primary outputs; connect pins 5 to 7 and 6 to 8 on the secondary side, with pins 5 and 8 as secondary outputs. This constitutes a 400V transformer with a primary-to-secondary turns ratio of 2:1. Figure 5 As shown; connecting pins 2 to 3 on the primary side, with pins 1 and 4 as primary side outputs, and connecting pins 6 to 7 on the secondary side, with pins 5 and 8 as secondary side outputs, constitutes a transformer with a primary-to-secondary turns ratio of 1:1 and a rated capacity of 800V. Figure 6 As shown. It is understandable that, with the same output power, the output current is halved when the voltage is doubled. Therefore, the series / parallel connection of the secondary coils can meet the current requirements under their respective voltages. However, since the above series / parallel operation is required, additional winding height and width space are needed, which will lead to a larger overall size of the integrated transformer. Moreover, the complex wiring in space is not conducive to automation.

[0056] To overcome the above-mentioned shortcomings, refer to Figure 7 , Figure 7 The schematic diagram of the module structure of a power converter compatible with different voltage platforms is provided for the application embodiment. In some feasible embodiments, the above-mentioned adapter board 12 may include a primary side adapter cable and a secondary side adapter cable.

[0057] The primary-side adapter wire electrically connects the first primary winding P1 and the second primary winding P2 to the main power board 11, respectively. The primary-side adapter wire also connects the first primary winding P1 and the second primary winding P2 in series. The secondary-side adapter wire electrically connects the first secondary winding S1 and the second secondary winding S2 to the main power board 11, respectively. The secondary-side adapter wire also connects the first secondary winding S1 and the second secondary winding S2 in series or in parallel according to the preset output voltage of the integrated transformer 20.

[0058] In this embodiment, the first primary winding P1, the second primary winding P2, the first secondary winding S1, and the second secondary winding S2 of the integrated transformer 20 can be wound onto four magnetic pillars by automated winding. The winding pins of each winding are connected and fixed to the base. Without the introduction of the adapter plate 12, the windings of the integrated transformer 20 are independent of each other, that is, there is no electrical connection between the pins of different windings. Therefore, the magnetic component manufacturer does not need to make different models of transformers for different voltage platforms, and there is no need to wind them in a specific way. That is, the integrated transformer 20 can support automated winding.

[0059] It is understood that in this embodiment, the integrated transformer 20 has different output voltage requirements for different voltage platforms. That is, the preset output voltage is different for different voltage platforms. For example, the preset output voltages for the ordinary 400V and the high-performance 800V high-voltage battery platforms can be 400V and 800V, respectively.

[0060] In this embodiment, the primary edge connecting line includes Figure 7 The thick dashed line portion within the intermediate connection board 12 not only electrically connects the first primary winding P1 and the second primary winding P2 to the main power board 11 respectively, but also connects the first primary winding P1 and the second primary winding P2 in series. This allows the primary and secondary winding turns ratio to be adjusted simply by changing the connection method of the secondary winding, thus ensuring compatibility with different voltage platforms. The secondary connection wires include... Figure 7 The thick solid line portion within the intermediate connection plate 12 electrically connects the first secondary winding S1 and the second secondary winding S2 to the main power plate 11, respectively. Figure 7 The secondary winding connection lines not shown need to be discussed in two cases: one is to connect the first secondary winding S1 and the second secondary winding S2 in series, and the other is to connect the first secondary winding S1 and the second secondary winding S2 in parallel.

[0061] As an example, when the preset output voltage of the integrated transformer 20 is 400V, the secondary winding connector connects the first secondary winding S1 and the second secondary winding S2 in parallel.

[0062] As an example, with the preset output voltage of the integrated transformer 20 being 800V, the secondary winding connector connects the first secondary winding S1 and the second secondary winding S2 in series.

[0063] Reference Figure 8 and Figure 9 In some feasible embodiments, the main power board 11 includes a first primary power connection point A, a second primary power connection point B, a first secondary power connection point C, and a second secondary power connection point D.

[0064] The first primary winding P1 includes a first pin 1 and a second pin 2, the second primary winding P2 includes a third pin 3 and a fourth pin 4, the first secondary winding S1 includes a fifth pin 5 and a sixth pin 6, and the second secondary winding S2 includes a seventh pin 7 and an eighth pin 8.

[0065] The primary side adapter wires are electrically connected to the first primary side power connection point A and the first pin 1, the second primary side power connection point B and the fourth pin 4, the second pin 2 and the third pin 3, respectively.

[0066] The secondary side adapter cable is electrically connected to the first secondary side power connection point C and the fifth pin 5, and the second secondary side power connection point D and the eighth pin 8, respectively.

[0067] The secondary adapter cable is electrically connected to pin 6 and pin 7, or the secondary adapter cable is electrically connected to pin 5 and pin 7, and pin 6 and pin 8, respectively.

[0068] In this embodiment, to avoid misunderstandings that may result from the crossover between the primary and secondary adapter cables, the following measures are taken: Figure 1 The process involved disassembly and refinement, and then, based on the two scenarios of connecting the first secondary winding S1 and the second secondary winding S2 in series or in parallel using the secondary winding adapter, the following results were obtained: Figure 8 and Figure 9 Wiring diagrams for the two types of adapter boards 12 shown.

[0069] As an example, such as Figure 8 The diagram shown is the wiring diagram of the adapter board 12 that supports 400V. It can be understood that when the preset output voltage of the integrated transformer 20 is 400V, the secondary adapter wires are electrically connected to the fifth pin 5 and the seventh pin 7, the sixth pin 6 and the eighth pin 8 respectively.

[0070] As an example, such as Figure 9 The diagram shown is the wiring diagram of the adapter board 12 that supports 800V. It can be understood that when the preset output voltage of the integrated transformer 20 is 800V, the secondary adapter wire is electrically connected to the sixth pin 6 and the seventh pin 7.

[0071] This embodiment provides a power converter compatible with different voltage platforms. By adding a shielding layer, the integrated transformer is shielded from the signal circuit above, reducing leakage magnetic field interference and optimizing the power density and cost of the product. The standardization of materials will also better reduce product costs and improve the quality control of the magnetic component transformer. Furthermore, by adding an adapter board, the electrical connection between the main power board and the integrated transformer, as well as the electrical connection between some windings of the integrated transformer, is realized. In this way, even if it is applied to different voltage platforms, there is no need to change the winding structure of the integrated transformer. Only the connection method between the secondary windings of the integrated transformer needs to be changed by replacing the adapter board with one that adopts a different wiring method. This makes the transformer compatible with different voltage platforms without increasing the transformer size. The transformer also supports automated winding, which realizes the miniaturization of transformer size, automated winding, and standardization of materials for different voltage platforms.

[0072] Furthermore, this application also provides an on-board charger, which includes the power converter compatible with different voltage platforms provided in the above embodiments.

[0073] Since the on-board charger proposed in this embodiment includes the power converter compatible with different voltage platforms proposed in the above embodiments, it has the beneficial effects of the above embodiments. For details on the specific working process and principle of the power converter compatible with different voltage platforms, please refer to the power converter compatible with different voltage platforms provided in the above embodiments. It will not be repeated here, and all are within the protection scope of this embodiment.

[0074] In addition, this application also provides a vehicle that includes the on-board charger provided in the above embodiments.

[0075] Since the on-board charger proposed in this embodiment includes the on-board charger proposed in the above embodiments, it has the beneficial effects of the above embodiments. For details on the specific working process and principle of the power converter compatible with different voltage platforms in the on-board charger, please refer to the power converter compatible with different voltage platforms provided in the above embodiments. They will not be described in detail here, and all are within the protection scope of this embodiment.

[0076] It should be noted that the technical solutions of the various embodiments of this application can be combined with each other, but only if they are implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0077] The above are merely optional embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A power converter compatible with different voltage platforms, characterized in that, The power converter compatible with different voltage platforms includes: a power module, an integrated transformer, and a first shielding layer; The power module is connected to the integrated transformer; The integrated transformer includes a base and a first primary winding, a second primary winding, a first secondary winding, and a second secondary winding respectively wound on different magnetic pillars. The first primary winding, the second primary winding, the first secondary winding, and the second secondary winding are respectively fixedly connected to the base, and the first shielding layer is embedded in the base.

2. The power converter compatible with different voltage platforms as described in claim 1, characterized in that, The power module includes a main power board and an adapter board, the adapter board being connected to the main power board and the integrated transformer respectively; the power converter compatible with different voltage platforms further includes: The second shielding layer is disposed in the adapter plate.

3. The power converter compatible with different voltage platforms as described in claim 2, characterized in that, The adapter board includes a primary side adapter cable and a secondary side adapter cable; The primary-side adapter wire electrically connects the first primary winding and the second primary winding to the main power board respectively. The primary-side adapter wire also connects the first primary winding and the second primary winding in series. The secondary-side adapter wire electrically connects the first secondary winding and the second secondary winding to the main power board respectively. The secondary-side adapter wire also connects the first secondary winding and the second secondary winding in series or in parallel according to the preset output voltage of the integrated transformer.

4. The power converter compatible with different voltage platforms as described in claim 3, characterized in that, When the preset output voltage of the integrated transformer is 400V, the secondary winding connector connects the first secondary winding and the second secondary winding in parallel.

5. The power converter compatible with different voltage platforms as described in claim 3, characterized in that, When the preset output voltage of the integrated transformer is 800V, the secondary winding connector connects the first secondary winding and the second secondary winding in series.

6. The power converter compatible with different voltage platforms as described in claim 3, characterized in that, The main power board includes a first primary-side power connection point, a second primary-side power connection point, a first secondary-side power connection point, and a second secondary-side power connection point. The first primary winding includes a first pin and a second pin, the second primary winding includes a third pin and a fourth pin, the first secondary winding includes a fifth pin and a sixth pin, and the second secondary winding includes a seventh pin and an eighth pin. The primary-side adapter wires are respectively electrically connected to the first primary-side power connection point and the first pin, the second primary-side power connection point and the fourth pin, and the second pin and the third pin; The secondary side adapter cable is electrically connected to the first secondary side power connection point and the fifth pin, and the second secondary side power connection point and the eighth pin, respectively; The secondary adapter wire is electrically connected to the sixth pin and the seventh pin, or the secondary adapter wire is electrically connected to the fifth pin and the seventh pin, and the sixth pin and the eighth pin, respectively.

7. The power converter compatible with different voltage platforms as described in claim 6, characterized in that, When the preset output voltage of the integrated transformer is 400V, the secondary adapter wire is electrically connected to the fifth pin and the seventh pin, the sixth pin and the eighth pin respectively.

8. The power converter compatible with different voltage platforms as described in claim 6, characterized in that, When the preset output voltage of the integrated transformer is 800V, the secondary adapter wire is electrically connected to the sixth pin and the seventh pin.

9. An on-board charger, characterized in that, The on-board charger includes a power converter compatible with different voltage platforms as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes the on-board charger as described in claim 9.

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