Isolated auxiliary power supply framework and vehicle

Abstract

The invention provides an isolated auxiliary power supply framework and a vehicle, and the isolated auxiliary power supply framework is used in the electrically driven vehicle and comprises a first path and a second path; the first path comprises a first three-phase power supply and a first driver; the first end of the first phase, the first end of the second phase and the first end of the third phase of the three-phase power supply are respectively connected with the output end of the first battery; the second end of the first phase of the three-phase power supply is connected with the first phase of the first driver, the second end of the second phase of the three-phase power supply is connected with the second phase of the first driver, and the second end of the third phase of the three-phase power supply is connected with the third phase of the first driver; the second path comprises a second three-phase power supply and a second driver; the output end of the second battery is connected with the input end of the second three-phase power supply, and the output end of the second three-phase power supply is connected with the second driver. The power supply in the isolated auxiliary power supply architecture provided by the invention comes from different paths, so that the safety and reliability of the system can be improved.

Description

Technical Field

[0001] The present invention relates to the field of power drive technology, and in particular to an isolated auxiliary power supply architecture and a vehicle. Background Art

[0002] The motor controller of new energy vehicles obtains high-voltage DC power from the power battery and provides controlled AC power to the motor; the control power of the motor controller comes from a DC-DC converter or a low-voltage battery, which is a rated 12V power supply, that is, there are both high-voltage and low-voltage power inside the motor controller. For safety reasons, the high-voltage and low-voltage need to be isolated. Like the power switch and gate driver, the isolated auxiliary power supply is a major component in the motor controller circuit. One of the main functions of the isolated auxiliary power supply is to provide the required isolated power for the gate driver.

[0003] However, the power supply of the conventional drive power architecture comes from one path. When a single point failure occurs, the entire system will not work properly. Summary of the invention

[0004] The present invention provides an isolated auxiliary power supply architecture and a vehicle. The power supply in the isolated auxiliary power supply architecture comes from two paths. When a single point failure occurs in any one of the paths, a control power supply can be generated through the other path, thereby improving the safety and reliability of the entire system.

[0005] According to a first aspect of the present invention, there is provided an isolated auxiliary power supply architecture for use in a vehicle with electric drive, comprising a first path and a second path;

[0006] The first path includes: a first three-phase power supply and a first drive; a first end of the first phase, a first end of the second phase, and a first end of the third phase of the first three-phase power supply are respectively connected to the output end of the first battery; a second end of the first phase of the first three-phase power supply is connected to the first phase of the first drive, a second end of the second phase of the first three-phase power supply is connected to the second phase of the first drive, and a second end of the third phase of the first three-phase power supply is connected to the third phase of the first drive;

[0007] The second path includes: a second three-phase power supply and a second drive; the output end of the second battery is connected to the input end of the second three-phase power supply, and the output end of the second three-phase power supply is connected to the second drive.

[0008] Optionally, in the second path, the first end of the first phase, the first end of the second phase and the first end of the third phase of the second three-phase power supply are respectively connected to the output end of the second battery; the second end of the first phase of the second three-phase power supply is connected to the first phase of the second drive, the second end of the second phase of the second three-phase power supply is connected to the second phase of the second drive, and the second end of the third phase of the second three-phase power supply is connected to the third phase of the second drive to realize primary power supply to the second three-phase power supply; and / or,

[0009] The output end of the second battery is connected to the input end of the second three-phase power supply, and the first phase, second phase and third phase of the second drive are respectively connected to the output end of the second three-phase power supply to realize power supply for the secondary side output of the second three-phase power supply.

[0010] Optionally, the circuit structure of the first path includes a first resistor, a second resistor, a first transistor, a feedback power supply, a first control chip and a first transformer;

[0011] The output end of the first battery is connected to the power supply end of the first control chip through the voltage division of the first resistor and the second resistor; the control end of the first control chip is connected to the primary coil of the first transformer through the first transistor, and the feedback signal end of the first control chip is connected to the feedback power supply.

[0012] Optionally, the secondary coil of the first transformer includes a first diode, a second diode and a third diode;

[0013] The positive electrode of the first diode is connected to the secondary coil, and the negative electrode of the first diode is connected to the first phase of the first three-phase power supply;

[0014] The anode of the second diode is connected to the secondary coil, and the cathode of the second diode is connected to the second phase of the first three-phase power supply;

[0015] An anode of the third diode is connected to the secondary coil, and a cathode of the third diode is connected to the third phase of the first three-phase power supply.

[0016] Optionally, the circuit structure of the second path includes a third resistor, a fourth resistor, a fourth diode, a second triode, a second control chip, an isolation chip and a second transformer;

[0017] The output end of the second battery is connected to the power supply end of the second control chip through the voltage divider of the third resistor and the fourth resistor; the fourth diode is connected in parallel with the third resistor; the control end of the second control chip is connected to the primary coil of the second transformer through the second transistor, and the feedback signal end of the second control chip is connected to the first end of the isolation chip.

[0018] Optionally, the secondary coil of the second transformer includes a fifth diode, a sixth diode and a seventh diode;

[0019] The anode of the fifth diode is connected to the secondary coil, and the cathode of the fifth diode is connected to the first phase of the second three-phase power supply;

[0020] The anode of the sixth diode is connected to the secondary coil, and the cathode of the sixth diode is connected to the second phase of the second three-phase power supply;

[0021] An anode of the seventh diode is connected to the secondary coil, and a cathode of the seventh diode is connected to the third phase of the second three-phase power supply.

[0022] Optionally, the circuit structure of the second path includes a first inductor, a second inductor, a first capacitor and a second capacitor;

[0023] The first end of the first inductor is connected to the positive electrode of the second battery, the first inductor is connected in series with the second inductor, and the second end of the second inductor is connected to the primary coil of the second transformer;

[0024] The first capacitor is connected in parallel with the second capacitor, the first end of the first capacitor is connected to the second end of the first inductor, the second end of the first capacitor is connected to the negative electrode of the second battery, the first end of the second capacitor is connected to the second end of the second inductor, and the second end of the second capacitor is connected to the second end of the first capacitor.

[0025] Optionally, the circuit structure of the second path includes a third capacitor, a first end of the third capacitor is connected to the positive electrode of the second battery, and a second end of the third capacitor is connected to the negative electrode of the second battery.

[0026] Optionally, the circuit structure of the second path also includes an eighth diode; the anode of the eighth diode is connected to the positive electrode of the second battery, and the cathode of the eighth diode is connected to the positive electrode of the first inductor.

[0027] According to a second aspect of the present invention, a vehicle is provided, comprising the isolated auxiliary power supply structure described in any one of the first aspects.

[0028] The present invention provides an isolated auxiliary power supply architecture and a vehicle, which are used in a vehicle with electric drive, and include a first path and a second path; the first path includes: a first three-phase power supply and a first drive; the first end of the first phase of the three-phase power supply, the first end of the second phase and the first end of the third phase are respectively connected to the output end of the first battery; the second end of the first phase of the three-phase power supply is connected to the first phase of the first drive, the second end of the second phase of the three-phase power supply is connected to the second phase of the first drive, and the second end of the third phase of the three-phase power supply is connected to the third phase of the first drive; the second path includes: a second three-phase power supply and a second drive; the output end of the second battery is connected to the input end of the second three-phase power supply, and the output end of the second three-phase power supply is connected to the second drive. The present invention provides an isolated auxiliary power supply architecture and a vehicle, in which the power supply in the isolated auxiliary power supply architecture comes from two paths. When a single point failure occurs in any of the paths, a control power supply can be generated through another path, thereby improving the safety and reliability of the entire system.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of a conventional closed-loop 6-way isolated auxiliary power supply architecture;

[0032] Figure 2 This is a schematic diagram of a conventional open-loop 6-way isolated auxiliary power supply architecture;

[0033] Figure 3 This is a schematic diagram of a conventional closed-loop 4-way isolated auxiliary power supply architecture;

[0034] Figure 4 is a schematic diagram of an isolated auxiliary power supply architecture provided by an embodiment of the present invention;

[0035] Figure 5 is a schematic diagram of another isolated auxiliary power supply architecture provided by an embodiment of the present invention;

[0036] Figure 6 is a circuit schematic diagram of a first path in another isolated auxiliary power supply architecture provided by an embodiment of the present invention;

[0037] Figure 7 It is a circuit schematic diagram of a second path in another isolated auxiliary power supply architecture provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0041] Figure 1 This is a schematic diagram of a conventional closed-loop 6-way isolated auxiliary power supply architecture. Figure 1 The conventional closed-loop 6-way isolated auxiliary power supply is powered by a low-voltage battery 1, and is connected to the first gate driver B and the second gate driver C through an isolated power supply A to be converted into a stable isolated power supply.

[0042] Figure 2 This is a schematic diagram of a conventional open-loop 6-way isolated auxiliary power supply architecture. Figure 2The conventional open-loop 6-way isolated auxiliary power supply is powered by a low-voltage battery 1, and is connected to the first gate driver B and the second gate driver C through an isolated power supply A to be converted into a stable isolated power supply. Different from the conventional closed-loop 6-way isolated auxiliary power supply architecture, a voltage regulator module 2 is provided in front, which is a single-ended primary inductor converter, a buck / boost converter and a flyback converter, suitable for a wide input voltage range, and provides a stable output voltage as the input of the isolated auxiliary power supply device, which is converted into a stable isolated power supply through an open-loop power management device.

[0043] The above two isolated auxiliary power supply architectures require at least 6 transformers and a large number of power management chips, which are costly, and the power supply is all derived from the low-voltage battery 1. If this path fails, the entire system will not be able to be used normally. From the perspective of functional safety, this is not a suitable choice.

[0044] Figure 3 This is a schematic diagram of a conventional closed-loop 4-way isolated auxiliary power supply architecture. Figure 3 The conventional closed-loop 4-way isolated auxiliary power supply architecture requires at least 4 transformers and more power management chips. It is slightly cheaper, but still has a single point of failure problem. From a functional safety perspective, it is not always a suitable choice.

[0045] Figure 4 is a schematic diagram of an isolated auxiliary power supply architecture provided by an embodiment of the present invention, referring to Figure 4 An embodiment of the present invention provides an isolated auxiliary power supply architecture for use in a vehicle with electric drive, including a first path D and a second path E; the first path D includes: a first three-phase power supply F and a first drive G; the first end of the first phase, the first end of the second phase and the first end of the third phase of the first three-phase power supply F are respectively connected to the output end of the first battery 3; the second end of the first phase of the first three-phase power supply F is connected to the first phase of the first drive G, the second end of the second phase of the first three-phase power supply F is connected to the second phase of the first drive G, and the second end of the third phase of the first three-phase power supply F is connected to the third phase of the first drive G; the second path E includes: a second three-phase power supply H and a second drive J; the output end of the second battery 4 is connected to the input end of the second three-phase power supply H, and the output end of the second three-phase power supply H is connected to the second drive J.

[0046] Specifically, refer to Figure 4The isolated auxiliary power supply architecture provided by the embodiment of the present invention includes two paths, namely a first path D and a second path E, the first path D: a first three-phase power supply F, a first driver G, the first end of the first phase of the first three-phase power supply F, the first end of the second phase and the first end of the third phase are respectively connected to the output end of the first battery 3, the second end of the first phase of the first three-phase power supply F is connected to the first phase of the first driver G, the second end of the second phase of the first three-phase power supply F is connected to the second phase of the first driver G, and the second end of the third phase of the first three-phase power supply F is connected to the third phase of the first driver G;

[0047] Second path E: second three-phase power supply H, second drive J; the output end of the second battery 4 is connected to the input end of the second three-phase power supply H, and the output end of the second three-phase power supply H is connected to the second drive J. Exemplarily, the first battery 3 is a 12V low-voltage storage battery, and the second battery 4 is a high-voltage power battery.

[0048] Optional, continue to refer to Figure 4 , in the second path E, the first end of the first phase, the first end of the second phase and the first end of the third phase of the second three-phase power supply H are respectively connected to the output end of the second battery 4; the second end of the first phase of the second three-phase power supply H is connected to the first phase of the second driver J, the second end of the second phase of the second three-phase power supply H is connected to the second phase of the second driver J, and the second end of the third phase of the second three-phase power supply H is connected to the third phase of the second driver J to realize the primary side power supply of the second three-phase power supply H; and / or,

[0049] Figure 5 is another isolated auxiliary power supply architecture schematic diagram provided by an embodiment of the present invention, refer to Figure 5 The output end of the second battery 4 is connected to the input end of the second three-phase power supply H, and the first phase, the second phase and the third phase of the second drive J are respectively connected to the output end of the second three-phase power supply H to realize power supply to the secondary side output of the second three-phase power supply H.

[0050] Specifically, in the second path E, there are two different ways of using electricity obtained through the second battery 4. The first is to use it as a backup low-voltage electricity for the battery, and ultimately to power the primary side of the second three-phase power supply H, that is: the first end of the first phase, the first end of the second phase, and the first end of the third phase of the second three-phase power supply H are respectively connected to the output end of the second battery 4; the second end of the first phase of the second three-phase power supply H is connected to the first phase of the second drive J, the second end of the second phase of the second three-phase power supply H is connected to the second phase of the second drive J, and the second end of the third phase of the second three-phase power supply H is connected to the third phase of the second drive J.

[0051] The second type is an isolated auxiliary power supply directly used as a gate driver to power the secondary side output of the second three-phase power supply H, that is, the output end of the second battery 4 is connected to the input end of the second three-phase power supply H, and the first phase, second phase and third phase of the second drive J are respectively connected to the output end of the second three-phase power supply H.

[0052] Figure 6 is a circuit schematic diagram of the first path in another isolated auxiliary power supply architecture provided by an embodiment of the present invention, with reference to Figure 6 Optionally, the circuit structure of the first path D includes a first resistor R1, a second resistor R2, a first transistor Q1, a feedback power supply Vcc, a first control chip U1 and a first transformer T1; the output terminal Vin of the first battery is connected to the power supply terminal EN of the first control chip U1 after voltage division by the first resistor R1 and the second resistor R2; the control terminal GATE of the first control chip U1 is connected to the primary coil of the first transformer T1 through the first transistor Q1, and the feedback signal terminal FB of the first control chip U1 is connected to the feedback power supply Vcc.

[0053] Specifically, the output terminal Vin of the first battery is divided by the first resistor R1 and the second resistor R2, and then transmitted to the power supply terminal EN of the first control chip U1. The first battery can be a 12V low-voltage battery; the control terminal GATE of the first control chip U1 is connected to the primary coil of the first transformer T1 through the first transistor Q1, and the feedback signal terminal FB of the first control chip U1 is connected to the feedback power supply Vcc to stabilize the output voltage.

[0054] Optional, continue to refer to Figure 6 The secondary coil of the first transformer includes a first diode D1, a second diode D2 and a third diode D3; the anode of the first diode D1 is connected to the secondary coil, and the cathode of the first diode D1 is connected to the first phase of the first three-phase power supply; the anode of the second diode D2 is connected to the secondary coil, and the cathode of the second diode D2 is connected to the second phase of the first three-phase power supply; the anode of the third diode D3 is connected to the secondary coil, and the cathode of the third diode D3 is connected to the third phase of the first three-phase power supply.

[0055] Specifically, the first diode D1, the second diode D2 and the third diode D3 are connected to the first phase, the second phase and the third phase of the first three-phase power supply respectively. Figure 6 The circuit shown can achieve the technical effect of generating three-way isolated power supplies by only using one control chip and one transformer, which greatly reduces the cost. In addition, the feedback signal terminal provided can also improve the safety and reliability of the entire system.

[0056] Figure 7 is a circuit schematic diagram of the second path in another isolated auxiliary power supply architecture provided by an embodiment of the present invention, reference Figure 7Optionally, the circuit structure of the second path E includes a third resistor R3, a fourth resistor R4, a fourth diode D4, a second triode Q2, a second control chip U2, an isolation chip U3 and a second transformer T2; the output end of the second battery is connected to the power supply end VIN of the second control chip U2 through a voltage divider of the third resistor R3 and the fourth resistor R4; the fourth diode D4 is connected in parallel with the third resistor R3; the control end GATE of the second control chip U2 is connected to the primary coil of the second transformer T2 through the second triode Q2, and the feedback signal end FB of the second control chip U2 is connected to the first end of the isolation chip U3.

[0057] Specifically, the second battery can be a high-voltage power battery. The output end of the second battery is connected to the power supply end VIN of the second control chip U2 after voltage division by the third resistor R3 and the fourth resistor R4. The second control chip U2 controls the second transistor Q2 to output the duty cycle voltage to the primary coil of the second transformer T2. The feedback signal end FB of the second control chip U2 is connected to the first end of the isolation chip U3 for feedback monitoring of the stability of the output voltage.

[0058] Optional, continue to refer to Figure 7 The secondary coil of the second transformer T2 includes a fifth diode D5, a sixth diode D6 and a seventh diode D7; the anode of the fifth diode D5 is connected to the secondary coil, and the cathode of the fifth diode D5 is connected to the first phase of the second three-phase power supply; the anode of the sixth diode D6 is connected to the secondary coil, and the cathode of the sixth diode D6 is connected to the second phase of the second three-phase power supply; the anode of the seventh diode D7 is connected to the secondary coil, and the cathode of the seventh diode D7 is connected to the third phase of the second three-phase power supply.

[0059] Specifically, the fifth diode D5, the sixth diode D6 and the seventh diode D7 are connected to the first phase, the second phase and the third phase of the second three-phase power supply respectively. Figure 7 The circuit shown can achieve the technical effect of generating three independently isolated high-voltage backup power supplies by only one control chip and one transformer, which greatly reduces the cost. In addition, the feedback signal terminal provided can also improve the safety and reliability of the entire system.

[0060] Optional, continue to refer to Figure 7The circuit structure of the second path includes a first inductor L1, a second inductor L2, a first capacitor C1 and a second capacitor C2; a first end of the first inductor L1 is connected to the positive electrode of the second battery, the first inductor L1 and the second inductor L2 are connected in series, and a second end of the second inductor L2 is connected to the primary coil of the second transformer T2; the first capacitor C1 and the second capacitor C2 are connected in parallel, a first end of the first capacitor C1 is connected to the second end of the first inductor L1, a second end of the first capacitor C1 is connected to the negative electrode of the second battery, a first end of the second capacitor C2 is connected to the second end of the second inductor L2, and a second end of the second capacitor C2 is connected to the second end of the first capacitor C1.

[0061] Specifically, the filtering and absorbing circuit composed of the first inductor L1, the second inductor L2, the first capacitor C1 and the second capacitor C2 can be used to pre-process the signal transmitted by the second battery.

[0062] Optional, continue to refer to Figure 7 The circuit structure of the second path includes a third capacitor C3, a first end of the third capacitor C3 is connected to the positive electrode of the second battery, and a second end of the third capacitor C3 is connected to the negative electrode of the second battery.

[0063] Specifically, a first end of the third capacitor C3 is connected to the positive electrode of the second battery, and a second end of the third capacitor C3 is connected to the negative electrode of the second battery, for filtering and storing energy for the entire circuit.

[0064] Optional, continue to refer to Figure 7 The circuit structure of the second path also includes an eighth diode D8; the anode of the eighth diode D8 is connected to the anode of the second battery, and the cathode of the eighth diode D8 is connected to the anode of the first inductor L1.

[0065] Specifically, the anode of the eighth diode D8 is connected to the anode of the second battery, and the cathode of the eighth diode D8 is connected to the anode of the first inductor L1 to protect the correct flow direction of the current of the entire circuit.

[0066] According to the same inventive concept, an embodiment of the present invention further provides a vehicle, comprising the isolated auxiliary power supply structure described in any of the above-mentioned inventive embodiments.

[0067] A vehicle provided by an embodiment of the present invention can achieve the same technical effect as an isolated auxiliary power supply structure provided by the above-mentioned embodiment of the invention, which will not be repeated here.

[0068] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An isolated auxiliary power supply architecture, characterized in that: For use in a vehicle having an electric drive, comprising a first path and a second path; The first path includes: a first three-phase power supply and a first drive; a first end of the first phase, a first end of the second phase, and a first end of the third phase of the first three-phase power supply are respectively connected to the output end of the first battery; a second end of the first phase of the first three-phase power supply is connected to the first phase of the first drive, a second end of the second phase of the first three-phase power supply is connected to the second phase of the first drive, and a second end of the third phase of the first three-phase power supply is connected to the third phase of the first drive; The second path includes: a second three-phase power supply and a second drive; the output end of the second battery is connected to the input end of the second three-phase power supply, and the output end of the second three-phase power supply is connected to the second drive.

2. The isolated auxiliary power supply architecture according to claim 1, characterized in that: In the second path, the first end of the first phase, the first end of the second phase and the first end of the third phase of the second three-phase power supply are respectively connected to the output end of the second battery; the second end of the first phase of the second three-phase power supply is connected to the first phase of the second drive, the second end of the second phase of the second three-phase power supply is connected to the second phase of the second drive, and the second end of the third phase of the second three-phase power supply is connected to the third phase of the second drive to realize the primary side power supply of the second three-phase power supply; and / or, The output end of the second battery is connected to the input end of the second three-phase power supply, and the first phase, second phase and third phase of the second drive are respectively connected to the output end of the second three-phase power supply to realize power supply for the secondary side output of the second three-phase power supply.

3. The isolated auxiliary power supply architecture according to claim 1, characterized in that: The circuit structure of the first path includes a first resistor, a second resistor, a first transistor, a feedback power supply, a first control chip and a first transformer; The output end of the first battery is connected to the power supply end of the first control chip through the voltage division of the first resistor and the second resistor; the control end of the first control chip is connected to the primary coil of the first transformer through the first transistor, and the feedback signal end of the first control chip is connected to the feedback power supply.

4. The isolated auxiliary power supply architecture according to claim 3, characterized in that: The secondary coil of the first transformer includes a first diode, a second diode and a third diode; The positive electrode of the first diode is connected to the secondary coil, and the negative electrode of the first diode is connected to the first phase of the first three-phase power supply; The anode of the second diode is connected to the secondary coil, and the cathode of the second diode is connected to the second phase of the first three-phase power supply; An anode of the third diode is connected to the secondary coil, and a cathode of the third diode is connected to the third phase of the first three-phase power supply.

5. The isolated auxiliary power supply architecture according to claim 2, characterized in that: The circuit structure of the second path includes a third resistor, a fourth resistor, a fourth diode, a second triode, a second control chip, an isolation chip and a second transformer; The output end of the second battery is connected to the power supply end of the second control chip through the voltage divider of the third resistor and the fourth resistor; the fourth diode is connected in parallel with the third resistor; the control end of the second control chip is connected to the primary coil of the second transformer through the second transistor, and the feedback signal end of the second control chip is connected to the first end of the isolation chip.

6. The isolated auxiliary power supply architecture according to claim 5, characterized in that: The secondary coil of the second transformer includes a fifth diode, a sixth diode and a seventh diode; The anode of the fifth diode is connected to the secondary coil, and the cathode of the fifth diode is connected to the first phase of the second three-phase power supply; The anode of the sixth diode is connected to the secondary coil, and the cathode of the sixth diode is connected to the second phase of the second three-phase power supply; An anode of the seventh diode is connected to the secondary coil, and a cathode of the seventh diode is connected to the third phase of the second three-phase power supply.

7. The isolated auxiliary power supply architecture according to claim 5, characterized in that: The circuit structure of the second path includes a first inductor, a second inductor, a first capacitor and a second capacitor; The first end of the first inductor is connected to the positive electrode of the second battery, the first inductor is connected in series with the second inductor, and the second end of the second inductor is connected to the primary coil of the second transformer; The first capacitor is connected in parallel with the second capacitor, the first end of the first capacitor is connected to the second end of the first inductor, the second end of the first capacitor is connected to the negative electrode of the second battery, the first end of the second capacitor is connected to the second end of the second inductor, and the second end of the second capacitor is connected to the second end of the first capacitor.

8. The isolated auxiliary power supply architecture according to claim 5, characterized in that: The circuit structure of the second path includes a third capacitor, a first end of the third capacitor is connected to the positive electrode of the second battery, and a second end of the third capacitor is connected to the negative electrode of the second battery.

9. The isolated auxiliary power supply architecture according to claim 7, characterized in that: The circuit structure of the second path further includes an eighth diode; an anode of the eighth diode is connected to the anode of the second battery, and a cathode of the eighth diode is connected to the anode of the first inductor.

10. A vehicle, characterized in that: It comprises the isolated auxiliary power supply structure as described in any one of claims 1 to 9.

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