Power supply device, driving device

Abstract

The present invention discloses a power supply device and a driving device, wherein the power supply device includes a power supply group, a power supply processing circuit, a voltage converter, a connecting line, an inductor, and a capacitor; the power supply processing circuit includes: a first switch device, the output end of the first switch device is connected to the first input line; a second switch device, the input end of the second switch device is connected to the second input line, and the output end of the second switch device is connected to the input end of the first switch device. The first switch device and the second switch device can be used to access control signals such as duty cycle, one of the first switch device and the second switch device can be used as a switch and the other is used for conduction, at this time, the power supply processing circuit can form a boost circuit (boost circuit) with the remaining effective power supply units, so that the power supply group maintains a stable output voltage, and the power supply device can remove the battery with a large volume and weight, thereby improving stability.

Description

Technical Field

[0001] The present invention relates to the technical field of power conversion, and in particular to a power supply device and a driving device. Background Art

[0002] For driving devices such as cars and electric vehicles, the traditional 12V power supply system supplies power to the load through the high-voltage power battery of the driving device, the high-voltage to 12V DC converter and the 12V battery. The load includes electronic equipment such as lights in the car, instrument central lock, vehicle controller, airbag sensor, etc. Some loads have high safety requirements. In the traditional solution, the 12V power supply system of electric vehicles includes two power sources, including a parallel high-voltage to low-voltage circuit and a 12V battery. The high-voltage to low-voltage circuit includes a voltage converter DC-DC (Direct Current to Direct Current converter, DC voltage converter), in which the DC-DC is responsible for realizing the energy conversion between the high-voltage power battery (the voltage of the high-voltage power battery is higher than the target voltage 12V, which can also be called a power battery) and the target voltage 12V; the 12V battery can provide uninterrupted power to the load when the DC-DC is not working. In order to ensure the service life of the 12V battery, in most cases, the load power is mainly provided by the high-voltage power battery and the high-voltage to 12V DC-DC, and the 12V battery will not provide energy to the load. As a backup, the 12V battery will replenish energy to the load when the high-voltage to 12V DC converter does not work or the transient response cannot meet the requirements, thereby ensuring stable and reliable operation of the low-voltage 12V power supply system.

[0003] In the above power supply system, the high-voltage to low-voltage circuit may not be able to supply power to the load when a fault occurs, and the stability is poor; if the 12V power supply cannot supply power normally at this time, the power supply system cannot supply power to the outside normally. Summary of the invention

[0004] The main purpose of the present invention is to provide a power supply device, aiming to improve the power supply stability.

[0005] To achieve the above-mentioned purpose, the power supply device proposed in the present invention includes a power supply group consisting of two power supply units connected in series, a power supply processing circuit and a voltage converter; the voltage converter includes a first input line and a second input line, the positive input end of the voltage converter is connected to the positive electrode of the power supply group through the first input line, and the negative input end of the voltage converter is connected to the negative electrode of the power supply group through the second input line; the power supply processing circuit is connected between the power supply group and the voltage converter, and the power supply processing circuit includes: a first switching device, the output end of the first switching device is connected to the first input line; a second switching device, the input end of the second switching device is connected to the second input line, and the output end of the second switching device is connected to the input end of the first switching device; a connecting line and an inductor, one end of the connecting line is connected between the two power supply units, and the other end of the connecting line is connected to the common point of the first switching device and the second switching device through the inductor; a capacitor, one end of the capacitor is connected to the output end of the first switching device, and the other end of the capacitor is connected to the input end of the second switching device;

[0006] The power supply device also includes: a controller, used to control the conduction or cutoff of the first switching device and the second switching device, so that the first switching device and the second switching device work alternately according to a preset duty cycle; the first output end of the controller is connected to the controlled end of the first switching device, and the second output end of the controller is connected to the controlled end of the second switching device.

[0007] Optionally, the first switching device and the second switching device are both configured as semiconductor switching devices.

[0008] Optionally, the first switch device and / or the second switch device is configured as a MOS tube or a triode.

[0009] Optionally, the power supply device includes two of the power processing circuits and two of the voltage converters, and the two of the power processing circuits are connected to the two of the voltage converters in a one-to-one correspondence.

[0010] Optionally, the power supply device also includes: a first fuse, which is arranged on the first input line and connected between one end of the first input line connected to the power supply group and the first switching device, or is arranged on the second input line and connected between one end of the second input line connected to the power supply group and the second switching device; a second fuse, which is arranged on the connecting line and connected in series with the inductor.

[0011] Optionally, the output ends of the two voltage converters are respectively connected to different loads to supply power to the different loads.

[0012] Optionally, the output ends of the two voltage converters are connected in parallel to supply power to the same load.

[0013] Optionally, the two voltage converters are respectively a first voltage converter and a second voltage converter, and the power supply system further includes: a first anti-reverse diode, an anode of the first anti-reverse diode is connected to the positive output end of the first voltage converter; a second anti-reverse diode, an anode of the second anti-reverse diode is connected to the positive output end of the second voltage converter, and a cathode of the second anti-reverse diode is connected in common with the cathode of the first anti-reverse diode; and a negative output end of the first voltage converter is connected in common with the negative output end of the second voltage converter.

[0014] Optionally, the two voltage converters are respectively a first voltage converter and a second voltage converter, and the output end of the first voltage converter and the output end of the second voltage converter are respectively used to connect to different power supply interfaces of a load having a redundant power supply interface.

[0015] The present invention also provides a traveling device, comprising the power supply device.

[0016] In the technical solution of the present invention, the power processing circuit is connected between the power supply group and the voltage converter, and the first switching device and the second switching device can be used to access control signals such as the duty cycle. When any one of the two power supply units in series of the power supply group fails to be disconnected, one of the first switching device and the second switching device can be used as a switch and the other is used for conduction. At this time, the power processing circuit can form a boost circuit (boosting circuit) with the remaining effective power supply units to boost the remaining effective power supply units, compensate for the output voltage loss of the power supply group after partial damage, and enable the power supply group to maintain a stable output voltage, which can improve the stability of the power supply system; the power supply device can remove the battery with a large volume and weight, become more compact while ensuring reliability, and improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a schematic structural diagram of an embodiment of a power supply device of the present invention.

[0019] Figure 2 It is a schematic structural diagram of another embodiment of the power supply device of the present invention.

[0020] Figure 3 It is a structural schematic diagram of another embodiment of the power supply device of the present invention.

[0021] Figure 4 It is a schematic structural diagram of another embodiment of the power supply device of the present invention.

[0022] Description of Figure Numbers:

[0023]

[0024]

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The invention provides a power supply device.

[0030] Reference Figures 1 to 4In one embodiment of the present invention, the power supply device includes a power supply group, the power supply group includes two power supply units BT1 and BT2 connected in series, and the power supply units BT1 and BT2 can be set as high-voltage power batteries with a voltage higher than a target voltage (the target voltage in this embodiment is 12V); the power supply device also includes a voltage converter (DC-DC1, DC-DC2), the voltage converter (DC-DC1, DC-DC2) includes a first input line 11 and a second input line 12, the first input line 11 and the second input line 12 are respectively connected to the positive electrode of the power supply group and the negative electrode of the power supply group; the power supply device also includes a power supply processing circuit 1 (or 1a, 1b), the power supply processing circuit 1 (or 1a, 1b) is connected between the power supply group and the voltage converter (DC-DC1, DC-DC2), that is, connected between the power supply group and the voltage converter (DC-DC1, DC-DC2) in the following manner:

[0031] The power processing circuit 1 (or 1a, 1b) includes a first switching device (Q1, Q3) and a second switching device (Q2, Q4), and the first switching device (Q1, Q3) and the second switching device (Q2, Q4) are both configured as semiconductor switching devices; specifically, the first switching device (Q1, Q3) and the second switching device (Q2, Q4) are both configured as MOS tubes and have better controllability. In an alternative embodiment, the first switching device (Q1, Q3) and the second switching device (Q2, Q4) are both configured as triodes. The output end of the first switching device (Q1, Q3) is connected to the first input line 11, the input end of the second switching device (Q2, Q4) is connected to the second input line 12, and the output end of the second switching device (Q2, Q4) is connected to the input end of the first switching device (Q1, Q3); the power supply device also includes a connecting line 12 and an inductor (L1, L2), one end of the connecting line 12 is connected between the two power supply units BT1 and BT2, and the other end of the connecting line 12 is connected to the common point of the first switching device (Q1, Q3) and the second switching device (Q2, Q4) via the inductor (L1, L2); the power supply device also includes a capacitor (Vc1, Vc2), one end of the capacitor (Vc1, Vc2) is connected to the output end of the first switching device (Q1, Q3), and the other end of the capacitor (Vc1, Vc2) is connected to the input end of the second switching device (Q2, Q4). Figures 1 to 4 In the embodiment of the present invention, the components of the power processing circuit 1 (or 1a, 1b) in the power supply device are as follows:

[0032]

[0033] The power processing circuit 1 (or 1a, 1b) of this embodiment can be set on a separate circuit board, and then connected to the power supply group, the controller for providing control signals, and the load through the circuit board as a carrier. That is, the power processing circuit and the power supply group, the controller, and the load can be set to be detachably connected.

[0034] It should be noted that the power processing circuit in the power supply device in this embodiment can be used in the following manner: the first switching device (Q1, Q3) and the second switching device (Q2, Q4) are connected to the duty cycle and other control signals from the beginning. Then, when the two power supply units BT1 and BT2 of the power supply group are not disconnected, the first switching device (Q1, Q3) and the second switching device (Q2, Q4) have no obvious effect on the input end of the voltage converter (DC-DC1, DC-DC2). When any of the two power supply units BT1 and BT2 in series of the power supply group fails such as disconnection, such as when BT1 is disconnected, among the first switch device Q1 (or Q3) and the second switch device Q2 (or Q4), the second switch device Q2 (or Q4) is used as a switch and the first switch device Q1 (or Q3) is used for conduction. At this time, the power supply processing circuit 1 (or 1a, 1b) can form a boost circuit (boosting circuit) with the remaining effective power supply unit BT2 to boost the remaining effective power supply unit BT2. The input voltage Vb2 provided by BT2 can be boosted to Vb1+Vb2 to compensate for the output voltage loss of the power supply group after partial damage (such as BT1 disconnection is considered as damage), so that the power supply group maintains a relatively stable output voltage, and the power supply system can improve stability after the battery is removed. When the power supply unit BT1 is disconnected, the power supply processing circuit 1 (or 1a, 1b) can quickly maintain the voltage of Vb1 to ensure the stability of the input voltage Vc1 of the voltage converter DC-DC1 (or voltage converter DC-DC2), thereby ensuring the normal power supply of LV1 to the outside. The situation after the power supply unit BT2 is disconnected is the same as that of the power supply unit BT1, and will not be repeated here.

[0035] The power processing circuit in the power supply device of this embodiment can also be used in the following manner: a power group status detection device is also provided, such as detecting the voltage of the power supply units BT1 and BT2, so that when any one of the power supply units BT1 and BT2 is disconnected, a signal is provided to control the first switch device (Q1, Q3) and the second switch device (Q2, Q4) to start connecting to the duty cycle and other control signals, and the first switch device (Q1, Q3) and the second switch device (Q2, Q4) start to work alternately at this time. When BT1 is disconnected, among the first switch device Q1 (or Q3) and the second switch device Q2 (or Q4), the second switch device Q2 (or Q4) is used as a switch and the first switch device Q1 (or Q3) is used for conduction. At this time, the power supply processing circuit 1 (or 1a, 1b) can form a boost circuit (boosting circuit) with the remaining effective power supply unit BT2 to boost the remaining effective power supply unit BT2. The input voltage Vb2 provided by BT2 can be boosted to Vb1+Vb2 to compensate for the output voltage loss of the power supply group after partial damage (such as BT1 disconnection is considered damage), so that the power supply group maintains a relatively stable output voltage, and the power supply system can improve stability after the battery is removed. When the power supply unit BT1 is disconnected, the power supply processing circuit 1 (or 1a, 1b) can quickly maintain the voltage of Vb1, ensure the stability of the input voltage Vc1 of the voltage converter DC-DC1 (or voltage converter DC-DC2), and thus ensure the normal power supply of LV1 to the outside. The situation after the power supply unit BT2 is disconnected is the same as that of the power supply unit BT1, and will not be repeated here.

[0036] The power supply device also includes a controller, which is used to control the conduction or cutoff of the first switch device (Q1, Q3) and the second switch device (Q2, Q4), that is, the controller is used to control the conduction or cutoff of the first switch device (Q1, Q3), and the controller is used to control the conduction or cutoff of the second switch device (Q2, Q4), so that the first switch device (Q1, Q3) and the second switch device (Q2, Q4) work alternately according to a preset duty cycle; the first output end of the controller is connected to the controlled end of the first switch device (Q1, Q3), and the second output end of the controller is connected to the controlled end of the second switch device (Q2, Q4). The controller can improve the stability of the output voltage of the power supply device by controlling the working duty cycle of the first switch device (Q1, Q3) and the second switch device (Q2, Q4). In this embodiment, the voltage of the power supply unit BT1 is set to be equal to the voltage of the power supply unit BT2, and the working duty cycle of the first switch device (Q1, Q3) and the second switch device (Q2, Q4) is set to 50%. It is understandable that the above voltage equality includes a certain deviation, such as a difference of 5% or 10% between the two; the above duty cycle includes a certain deviation, such as a deviation of 5% or 10%. In an alternative embodiment, the voltage of the power supply unit BT1 can also be set to be unequal to the voltage of the power supply unit BT2. In this case, the working duty cycle of the first switching device (Q1, Q3) and the second switching device (Q2, Q4) is calculated based on the voltage of the power supply unit BT1 (or the power supply unit BT2) and the total voltage of the power supply group (the voltage of the power supply unit BT1 plus the voltage of the power supply unit BT2), and the specific calculation can be made with reference to the input voltage, output voltage, and duty cycle of the boost circuit.

[0037] like Figures 2 to 4 As shown, the power supply device includes the two power supply processing circuits (1a and 1b) and two voltage converters (DC-DC1 and DC-DC2), the two voltage converters (DC-DC1, DC-DC2) are respectively the first voltage converter DC-DC1 and the second voltage converter DC-DC2, the two power supply processing circuits (1a and 1b) are connected to the two voltage converters (DC-DC1 and DC-DC2) in a one-to-one correspondence, that is, the power supply processing circuit 1a is connected to the first voltage converter DC-DC1, and the power supply processing circuit 1b is connected to the second voltage converter DC-DC2. The two power supply processing circuits (1a and 1b) are connected to the two voltage converters (DC-DC1 and DC-DC2) in a one-to-one correspondence, so that after one of the power supply processing circuits (1a or 1b) fails, the other power supply processing circuit (1b or 1a) can continue to provide a stable output voltage, further improving the stability of the power supply device.

[0038] The power supply device also includes a first fuse (F1, F2), which is arranged on the first input line 11 and connected between one end of the first input line 11 connected to the power supply group (i.e., the left end of the first input line 11 in the figure) and the first switch device (Q1, Q3), or the first fuse (F1, F2) is arranged on the second input line 12 and connected between one end of the second input line 12 connected to the power supply group (i.e., the left end of the second input line 12 in the figure) and the second switch device (Q2, Q4); the power supply device also includes a second fuse (F3, F4), which is arranged on the connecting line 12 and connected in series with the inductor (L1, L2). Specifically, the arrangement forms of the first fuse (F1, F2) include being arranged on the first input line 11 at the same time, being arranged on the second input line 12 at the same time, and being arranged on the first input line 11 and the other being arranged on the second input line 12. Figures 2 to 4 In the illustrated embodiment, the first fuse F1 corresponding to the power processing circuit 1a is arranged on the first input line 11, and the first fuse F2 corresponding to the power processing circuit 1b is arranged on the first input line 11. In an alternative embodiment, the first fuse F1 corresponding to the power processing circuit 1a is arranged on the first input line 11, and the first fuse F2 corresponding to the power processing circuit 1b is arranged on the second input line 12; the first fuse F1 corresponding to the power processing circuit 1a is arranged on the second input line 12, and the first fuse F2 corresponding to the power processing circuit 1b is arranged on the first input line 11; the first fuse F1 corresponding to the power processing circuit 1a is arranged on the second input line 12, and the first fuse F2 corresponding to the power processing circuit 1b is arranged on the second input line 12. Figures 2 to 4When the power supply device in is in use, when the first switch device Q1 is short-circuited, one of the first fuse F1 and the second fuse F3 will blow. When the second switch device Q2 fails due to a short circuit, the second fuse F3 will blow. When the first switch device Q1 and the second switch device Q2 fail due to a short circuit at the same time, the first fuse F1 will blow, that is, when the input side of DC-DC1 fails due to a short circuit, the first fuse F1 will blow. Therefore, if one of the connection circuit 1a and the converter DC-DC1 fails due to a short circuit, they will be disconnected from the power supply units BT1 and BT2, thereby ensuring the normal power supply of the second voltage converter DC-DC 2 and outputting the target voltage LV2 of 12V. When the first switch device Q3 is short-circuited, one of the first fuse F2 and the second fuse F4 will blow. When the second switch device Q4 fails due to a short circuit, the second fuse F4 will blow. When the first switch device Q3 and the second switch device Q4 fail to short-circuit at the same time, the first fuse F2 will be blown, that is, when the input side of the second voltage converter DC-DC2 fails to short-circuit, the first fuse F2 will be blown. Therefore, if one of the power supply processing circuit 1b and the second voltage converter DC-DC2 fails to short-circuit, they will be disconnected from the power supply units BT1 and BT2, thereby ensuring the normal power supply of the first converter DC-DC1 and outputting the target voltage LV1 of 12V. When the first fuse (F1, F2) and the second fuse (F3, F4) cause some components in the power supply device to fail, such as the first switch device (Q1, Q3) short-circuit, the second switch device (Q2, Q4) short-circuit, or the first switch device (Q1, Q3) and the second switch device (Q2, Q4) short-circuit at the same time, the first fuse (F1, F2), the second fuse (F3, F4) and the power supply processing circuit (1a, 1b) work together to disconnect from the power supply group and ensure the normal power supply of the power supply device.

[0039] In this embodiment, a power supply device including two power processing circuits (1a and 1b) and two voltage converters (DC-DC1 and DC-DC2) includes the following implementations when connected to a load: Figure 2 The first method is shown, in which the output ends of the first voltage converter DC-DC1 and the second voltage converter DC-DC2 are respectively used to connect to different loads for powering different loads, that is, the output voltage LV1 of the first voltage converter DC-DC1 is used to power load 1, and the output voltage LV2 of the second voltage converter DC-DC2 is used to power load 2. Figure 3The second method is shown, in which the output ends of the first voltage converter DC-DC1 and the second voltage converter DC-DC2 are connected in parallel to supply power to the same load. Specifically, the power supply device also includes a first anti-reverse diode D1, the anode of which is connected to the positive output end of the first voltage converter DC-DC1; the power supply device also includes a second anti-reverse diode D2, the anode of which is connected to the positive output end of the second voltage converter DC-DC2, and is used to connect the positive input end of the load; the cathode of the second anti-reverse diode D2 is connected in common with the cathode of the first anti-reverse diode D1; the negative output end of the first voltage converter DC-DC1 is connected in common with the negative output end of the second voltage converter DC-DC2, and is used to connect the negative input end of the load. Figure 4 A third approach is shown, where the corresponding load has redundant interfaces, such as Figure 4 The "interface" and "redundant interface" shown in the figure, the output end of the first voltage converter DC-DC1 and the output end of the second voltage converter DC-DC2 are different power supply interfaces, that is, the interface of the first voltage converter DC-DC1 is connected to the load, and the second voltage converter DC-DC2 is connected to the redundant interface of the load. The specific structure of the power supply processing circuit (1a and 1b) refers to the above embodiment. Since the power supply device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0040] The present invention also provides a driving device, including the above-mentioned power supply device, the driving device is set as an electric car, and the power supply group is set as a power battery. The specific structure of the power supply device refers to the above-mentioned embodiment. Since the driving device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A power supply device, It is characterized in that It includes a power supply group consisting of two power supply units connected in series, a power supply processing circuit and a voltage converter; The voltage converter comprises a first input line and a second input line, the positive input terminal of the voltage converter is connected to the positive electrode of the power supply group through the first input line, and the negative input terminal of the voltage converter is connected to the negative electrode of the power supply group through the second input line; The power processing circuit is connected between the power group and the voltage converter, and the power processing circuit includes: a first switching device, an output terminal of the first switching device being connected to the first input line; a second switching device, wherein an input terminal of the second switching device is connected to the second input line, and an output terminal of the second switching device is connected to an input terminal of the first switching device; A connecting line and an inductor, wherein one end of the connecting line is connected between the two power supply units, and the other end of the connecting line is connected to a common point of the first switching device and the second switching device via the inductor; a capacitor, one end of which is connected to the output end of the first switching device, and the other end of which is connected to the input end of the second switching device; The power supply device further comprises: A controller, used for controlling the on or off of the first switching device and the second switching device, so that the first switching device and the second switching device work alternately according to a preset duty cycle; The first output terminal of the controller is connected to the controlled terminal of the first switching device, and the second output terminal of the controller is connected to the controlled terminal of the second switching device.

2. The power supply device according to claim 1, It is characterized in that The first switching device and the second switching device are both configured as semiconductor switching devices.

3. The power supply device according to claim 1, It is characterized in that The first switch device and / or the second switch device are configured as MOS tubes or triodes.

4. The power supply device according to claim 1, It is characterized in that It comprises two power processing circuits and two voltage converters, and the two power processing circuits are connected to the two voltage converters in a one-to-one correspondence.

5. The power supply device according to claim 4, It is characterized in that Also includes: A first fuse is provided on the first input line and connected between an end of the first input line connected to the power supply group and the first switch device, or provided on the second input line and connected between an end of the second input line connected to the power supply group and the second switch device; A second fuse is arranged on the connecting line and is connected in series with the inductor.

6. The power supply device according to claim 4, It is characterized in that The output ends of the two voltage converters are respectively connected to different loads to supply power to the different loads.

7. The power supply device according to claim 4, It is characterized in that The output ends of the two voltage converters are connected in parallel to supply power to the same load.

8. The power supply device according to claim 7, It is characterized in that The two voltage converters are respectively a first voltage converter and a second voltage converter, and the power supply device further comprises: a first anti-reverse diode, wherein an anode of the first anti-reverse diode is connected to a positive output terminal of the first voltage converter; a second anti-reverse diode, wherein an anode of the second anti-reverse diode is connected to a positive output terminal of the second voltage converter, and a cathode of the second anti-reverse diode is commonly connected to a cathode of the first anti-reverse diode; A negative output terminal of the first voltage converter is connected in common with a negative output terminal of the second voltage converter.

9. The power supply device according to claim 4, It is characterized in that The two voltage converters are respectively a first voltage converter and a second voltage converter, and the output end of the first voltage converter and the output end of the second voltage converter are respectively used to connect to different power supply interfaces of a load having a redundant power supply interface.

10. A traveling device, It is characterized in that Comprising the power supply device according to any one of claims 1 to 9.

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