High-voltage branching device and generator system
By setting inverter and filter in the generator controller, and using shielding layer and nanocrystalline magnetic rings, the problem of electromagnetic interference transmission in the generator system is solved, ensuring the qualification of the vehicle's EMC test and electronic components. normal working.
Patent Information
- Application Number
- CN202411307935.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2024-12-27
AI Technical Summary
The high-voltage splitting design in the existing generator system causes electromagnetic interference generated by the inverter to transmit to the vehicle, affecting the vehicle's EMC test and the normal operation of other electronic components.
Set an inverter and filter in the generator controller, and set the high-voltage splitter at the output end of the filter. The transmission of electromagnetic interference is prevented by shielding layer and nanocrystalline magnetic ring, forming a closed cavity to prevent the transmission of electromagnetic interference. Cut off the electromagnetic interference path.
Effectively prevent electromagnetic interference generated by the inverter from being transmitted to the vehicle, ensure that the EMC test meets national standards, and avoids the impact on the electronic components of the vehicle.
Smart Images
Figure CN119209448A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electromagnetic compatibility design of range-extended generators, and in particular to a high-voltage line distribution device and a generator system. Background Art
[0002] With the rapid iteration and upgrading of extended-range new energy vehicles, the generator system assembly, as one of the key components of extended-range vehicles, is also developing towards lightweight, high efficiency, integration and intelligence. Integrating the high-voltage junction box into the generator controller has become an industry trend.
[0003] In the related art, a high-voltage distribution box is integrated in the generator controller, and a filter is usually set on the DC bus at the output end of the inverter, and then the DC bus is connected from the output end of the filter to the DC battery pack. After that, a high-voltage distribution line is directly set on the DC bus between the output end of the inverter and the filter to supply power to the DC electrical equipment in the car.
[0004] However, although this high-voltage branch line design can realize the function of high-voltage branch line, when the generator is working, the electromagnetic interference generated by the inverter will also be transmitted to the whole vehicle through the high-voltage branch line interface, resulting in the electromagnetic compatibility (EMC) test of the whole vehicle not meeting the national standards, and may also affect the normal operation of other electronic components of the whole vehicle. Summary of the invention
[0005] The present application discloses a high-voltage line distribution device and a generator system, which can effectively prevent the electromagnetic interference generated by the inverter from being transmitted to the entire vehicle while realizing the high-voltage line distribution function, thereby effectively ensuring that the EMC test of the entire vehicle meets national standards and avoids affecting the normal operation of other electronic components of the entire vehicle.
[0006] On the one hand, an embodiment of the present application provides a high-voltage line splitting device, including an inverter and a filter located in a generator controller;
[0007] The output end of the inverter and the input end of the filter are connected through a first DC bus, the output end of the filter leads to a second DC bus, and the second current bus leads to a DC battery pack;
[0008] The first DC bus is located inside the generator controller;
[0009] The part of the second DC bus located in the generator controller leads out a high-voltage branch line, and the high-voltage branch line is used to supply power to DC electrical equipment.
[0010] In one embodiment, a portion of the second DC bus located outside the generator controller is provided with a shielding layer, and the shielding layer is used to shield electromagnetic interference generated by the inverter.
[0011] In one implementation, a portion of the high-voltage branch line located outside the generator controller is provided with a shielding layer, and the shielding layer is used to shield electromagnetic interference generated by the inverter.
[0012] In one embodiment, a portion of the high-voltage branch line located in the generator controller is provided with a shielding layer, and the shielding layer is used to shield the electromagnetic interference generated by the inverter.
[0013] In one embodiment, a nanocrystalline magnetic ring is provided on the high-voltage branch line; the nanocrystalline magnetic ring is fixed inside the generator controller to prevent electromagnetic interference generated by DC power-consuming equipment from entering the second DC bus.
[0014] In one embodiment, a nanocrystalline magnetic ring is provided on the high-voltage branch line; the nanocrystalline magnetic ring is fixed to the outer wall of the generator controller to prevent electromagnetic interference generated by DC power-consuming equipment from entering the second DC bus.
[0015] In one embodiment, the high-voltage branch line device also includes a shielding wall, and the inverter and the lead-out points of the high-voltage branch line and the second DC bus are respectively located on both sides of the shielding wall, and the two sides form a closed cavity in the generator controller.
[0016] In one embodiment, the inverter includes a drive control board and an IGBT, the drive control board is connected to an input end of the IGBT, and an output end of the IGBT is connected to a filter.
[0017] In one embodiment, the DC power-consuming device includes a thermistor PTC or an air-conditioning device.
[0018] On the one hand, an embodiment of the present application provides a generator system, which includes any of the above-mentioned high-voltage line distribution devices.
[0019] The beneficial effects of this application are as follows:
[0020] The embodiment of the present application provides a high-voltage branching device and a generator system, in which the high-voltage branching connector is set at the output end of the filter. Therefore, when the generator is working, the DC power output by the inverter is filtered by the filter to remove electromagnetic interference, and then transmitted to the DC power-consuming equipment through the high-voltage branching line, which can prevent the influence of electromagnetic interference on the power-consuming equipment. In addition, when the DC battery pack outputs current, since the output current has passed through the battery pack filter, it does not need to be filtered again by the filter in the generator controller. Therefore, based on the high-voltage branching device in the embodiment of the present application, the output current of the DC battery pack will not cause electromagnetic interference to the DC power-consuming equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is one of the structural schematic diagrams of a high-voltage line distribution device provided in this application;
[0022] Figure 2 The second structural schematic diagram of a high-voltage line distribution device provided in this application;
[0023] Figure 3 The third structural schematic diagram of a high-voltage line distribution device provided in this application;
[0024] Figure 4 The fourth structural diagram of a high-voltage line distribution device provided in this application;
[0025] Figure 5 The fifth structural diagram of a high-voltage line distribution device provided in this application;
[0026] Figure 6 The sixth structural diagram of a high-voltage line distribution device provided in this application;
[0027] Figure 7 The seventh structural diagram of a high-voltage line distribution device provided in this application;
[0028] Figure 8 The eighth structural diagram of a high-voltage line distribution device provided in this application;
[0029] Fig. 9 A schematic structural diagram of a generator system provided in this application. DETAILED DESCRIPTION
[0030] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. The specific operating methods in the method embodiments can also be applied to device embodiments or system embodiments. It should be noted that in the description of the present application, "multiple" is understood as "at least two". "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. A is connected to B, which can represent: A is directly connected to B and A is connected to B through C. In addition, in the description of the present application, words such as "first" and "second" are only used to distinguish the purpose of description, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.
[0031] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings.
[0032] In the prior art, such as Figure 1 As shown, a high voltage distribution box (such as Figure 1(As shown in the dotted part in the figure), a filter is usually set on the DC bus at the output end of the inverter, and then the DC bus is connected from the output end of the filter to the DC battery pack. After that, a high-voltage branch line is directly set on the DC bus between the output end of the inverter and the filter to supply power to the DC electrical equipment in the car.
[0033] However, although this high-voltage branch line design can realize the function of high-voltage branch line, when the generator is working, the electromagnetic interference generated by the inverter will also be transmitted to the whole vehicle through the high-voltage branch line interface, resulting in the EMC test of the whole vehicle not meeting the national standards, and may also affect the normal operation of other electronic components of the whole vehicle.
[0034] In order to solve the above problems, the present application embodiment provides a high voltage line dividing device, such as Figure 2 As shown, it is a structural schematic diagram of a high-voltage branching device 200 provided in an embodiment of the present application, including an inverter 201 and a filter 202 located in a generator controller; wherein, the output end of the inverter 201 and the input end of the filter 202 are connected through a first DC bus, the output end of the filter leads to a second DC bus, and the second current bus leads to a DC battery pack; the first DC bus is located inside the generator controller; the part of the second DC bus located in the generator controller leads to a high-voltage branch line, and the high-voltage branch line is used to power DC electrical equipment.
[0035] It should be noted that the DC battery pack includes a battery pack filter for filtering the corresponding electromagnetic interference when the DC battery pack outputs DC power. In addition, whether it is the first DC bus, the second DC bus, or the high-voltage branch line, they all include positive and negative lines (not shown in the figure), forming their own current loops.
[0036] Through the high-voltage branching device, the high-voltage branching connector is set at the output end of the filter 202. Therefore, when the generator is working, the DC power output by the inverter 201 is filtered by the filter 202 for electromagnetic interference, and then transmitted to the DC power-consuming equipment through the high-voltage branch line, which can prevent the influence of electromagnetic interference on the power-consuming equipment. In addition, when the DC battery pack outputs current, since the output current has passed through the battery pack filter, it does not need to be filtered again by the filter in the generator controller. Therefore, based on the high-voltage branching device in the embodiment of the present application, the output current of the DC battery pack will not cause electromagnetic interference to the DC power-consuming equipment.
[0037] In one embodiment, if Figure 3 FIG. 1 is a schematic diagram of a structure of another high-voltage line dividing device 300 provided in an embodiment of the present application, wherein the second DC bus is located outside the generator controller (i.e. Figure 3The portion outside the middle dotted line) is provided with a shielding layer 301, which is used to shield the electromagnetic interference generated by the inverter and prevent the electromagnetic interference from entering the DC battery pack through the second DC bus.
[0038] Based on the high-voltage line splitter, a shielding layer 301 is provided on the second DC bus, which can effectively prevent electromagnetic interference from affecting EMC testing and normal operation of vehicle components.
[0039] It should be noted that the high-voltage branch node of the DC bus is usually a DC busbar, which is a bare copper busbar and is difficult to shield. Although the copper busbar is exposed, it is short in the small housing and far away from the inverter 201, so the received radiation is small and no shielding layer is required. However, the high-voltage branch line receives a large amount of electromagnetic radiation due to its long exposed length and parallel to the inverter 201, so a shielding layer is required.
[0040] In one implementation, Figure 4 FIG. 4 is a schematic diagram of a structure of another high-voltage branch line device 400 provided in an embodiment of the present application, wherein the high-voltage branch line is located outside the generator controller (i.e. Figure 4 The portion outside the dotted line is provided with a shielding layer 401, which is used to shield the electromagnetic interference generated by the inverter 201, and can effectively prevent the electromagnetic interference from affecting the EMC test and the normal operation of the vehicle components.
[0041] In one embodiment, if Figure 5 FIG. 1 is a schematic diagram of the structure of another high-voltage line dividing device 500 provided in an embodiment of the present application. Figure 5 In the case where the generator controller is highly integrated, the internal space of the generator controller is small, resulting in the distance between the inverter 201 and the high-voltage branch line being too close. At this time, the electromagnetic interference generated by the inverter 201 will be coupled to the high-voltage branch line along the direction indicated by the arrow, and then transmitted along the high-voltage branch line to the DC power-consuming equipment and along the second DC bus to the DC battery pack.
[0042] Therefore, in the embodiment of the present application, the portion of the high voltage branch line located in the generator controller (that is, Figure 5 The portion within the dotted line is provided with a shielding layer 501, which is used to shield the electromagnetic interference generated by the inverter 201, and can effectively prevent the electromagnetic interference from affecting the EMC test and the normal operation of the vehicle components.
[0043] It should be noted that the shielding layer 501 needs to be grounded at the output end of the filter 202, and the shielding layer 501 needs to be connected to the external shielding layer 401 at the high-voltage branch port to form a complete double-ended grounded shielding layer.
[0044] In one embodiment, if Figure 6 FIG. 1 is a schematic diagram of the structure of another high-voltage line dividing device 600 provided in an embodiment of the present application. Figure 6 In the middle, a nanocrystalline magnetic ring 601 is arranged on the high voltage branch line; the nanocrystalline magnetic ring 601 is fixed inside the generator controller (i.e. Figure 6 The portion within the dotted line in the middle is used to prevent electromagnetic interference generated by DC power equipment from entering the second DC bus. Based on the high-voltage branch line device 600, when the DC power equipment generates electromagnetic interference, or when the high-voltage branch line coupling generates electromagnetic interference, the reverse transmission of electromagnetic interference can be effectively prevented.
[0045] In one embodiment, if Figure 7 FIG. 1 is a schematic diagram of the structure of another high-voltage line dividing device 700 provided in an embodiment of the present application. Figure 7 In the invention, a nanocrystalline magnetic ring is arranged on the high-voltage branch line; the nanocrystalline magnetic ring is fixed to the outer wall of the generator controller to prevent the electromagnetic interference generated by the DC power equipment from entering the second DC bus. Based on the high-voltage branch line device 700, when the DC power equipment generates electromagnetic interference, or the high-voltage branch line coupling generates electromagnetic interference, the reverse transmission of the electromagnetic interference can be effectively prevented.
[0046] In one embodiment, if Figure 8 FIG. 1 is a schematic diagram of the structure of another high-voltage line dividing device 800 provided in an embodiment of the present application. Figure 8 The high-voltage branch line device also includes a shielding wall, and the inverter and the lead-out points of the high-voltage branch line and the second DC bus are respectively located on both sides of the shielding wall, and the two sides form a closed cavity in the generator controller.
[0047] Based on the high-voltage line splitter 800, a shielding wall 801 is added at the end of the filter 202. The shielding wall 801 is directly enclosed from the bottom to the top of the electric control housing, and is made of the same material as the housing, so as to block the electromagnetic interference from the electromagnetic interference path stage. The high-voltage line splitter has a good shielding effect, is relatively simple to manufacture, and has a low cost, and is suitable for electric controls with relatively ample housing space.
[0048] In one embodiment, the inverter 201 includes a drive control board and an IGBT, the drive control board is connected to the input end of the IGBT, and the output end of the IGBT is connected to the filter 202 .
[0049] In one embodiment, the DC power-consuming device includes a thermistor (Positive Temperature Coeficient, abbreviated as PTC) or an air-conditioning device.
[0050] On the one hand, the present application embodiment provides a generator system, such as Fig. 9As shown, a structural schematic diagram 900 of a generator system is provided in an embodiment of the present application, and the system 900 includes any of the above-mentioned high-voltage line distribution devices.
[0051] The drawings corresponding to any of the above-mentioned embodiments are merely examples and are not limitations on the structure. The various schematic diagrams may be in a parallel relationship or a progressive relationship, may be combined with each other, or the various subsystem structures in the various schematic diagrams may be combined with reference to each other. The specific combination method is not limited by the embodiments of the present application.
[0052] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.
[0053] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A high voltage line distribution device, characterized in that: Includes inverter and filter located in the generator controller; The output end of the inverter and the input end of the filter are connected via a first DC bus, the output end of the filter leads to a second DC bus, and the second current bus leads to a DC battery pack; The first DC bus is located inside the generator controller; A portion of the second DC bus located in the generator controller leads out a high-voltage branch line, and the high-voltage branch line is used to supply power to DC electrical equipment.
2. The device according to claim 1, characterized in that: The portion of the second DC bus located outside the generator controller is provided with a shielding layer, and the shielding layer is used to shield the electromagnetic interference generated by the inverter.
3. The device according to claim 1, characterized in that: The portion of the high-voltage branch line located outside the generator controller is provided with a shielding layer, and the shielding layer is used to shield the electromagnetic interference generated by the inverter.
4. The device according to claim 1, characterized in that: The portion of the high-voltage branch line located in the generator controller is provided with a shielding layer, and the shielding layer is used to shield the electromagnetic interference generated by the inverter.
5. The device according to claim 1, characterized in that: A nanocrystalline magnetic ring is arranged on the high-voltage branch line; the nanocrystalline magnetic ring is fixed inside the generator controller to prevent the electromagnetic interference generated by the DC power-consuming equipment from entering the second DC bus.
6. The device according to claim 1, characterized in that: A nanocrystalline magnetic ring is arranged on the high-voltage branch line; the nanocrystalline magnetic ring is fixed to the outer wall of the generator controller to prevent the electromagnetic interference generated by the DC power-consuming equipment from entering the second DC bus.
7. The device according to claim 1, characterized in that: It also includes a shielding wall, and the lead-out points of the inverter, the high-voltage branch line and the second DC bus are respectively located on both sides of the shielding wall, and the two sides form a closed cavity in the generator controller.
8. The device according to claim 1, characterized in that: The inverter includes a drive control board and an IGBT. The drive control board is connected to an input end of the IGBT, and an output end of the IGBT is connected to the filter.
9. The device according to claim 1, characterized in that: The DC power-consuming equipment includes a thermistor PTC or an air-conditioning device.
10. A generator system, characterized in that: The system comprises the device according to any one of claims 1 to 9.