WO2022242330A1

WO2022242330A1 - Power supply device and traveling device

Info

Publication number: WO2022242330A1
Application number: PCT/CN2022/084148
Authority: WO
Inventors: 刘玉伟
Original assignee: 深圳市汇川技术股份有限公司
Priority date: 2021-05-19
Filing date: 2022-03-30
Publication date: 2022-11-24
Also published as: CN113206543A

Abstract

The present application discloses a power supply device and a traveling device. The power supply device comprises a power pack, a power source processing circuit, a voltage converter, a connecting line, an inductor, and a capacitor. The power source processing circuit comprises: a first switch apparatus, an output end of the first switch apparatus being connected to a first input line; and a second switch apparatus, an input end of the second switch apparatus being connected to a second input line, and an output end of the second switch apparatus being connected to an input end of the first switch apparatus. The first switch apparatus and the second switch apparatus can be configured to be connected to a duty cycle, etc. control signal, one of the first switch apparatus and the second switch apparatus can be used as a switch, and the other is used for connection, and at the moment, the power source processing circuit and the remaining effective power source units can form a boost circuit.

Description

Power supply device, driving device

This application claims the priority of Chinese Patent Application No. 202110550275.2 filed on May 19, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The present application relates to the technical field of power conversion, in particular to a power supply device and a driving device.

Background technique

For driving devices such as automobiles 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. Partial loads have higher safety requirements for electronic equipment such as devices and airbag sensors. In the traditional solution, the 12V power supply system of electric vehicles includes two power supply 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 conversion device), in which 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 of 12V, which can also be called power battery) and the target voltage of 12V; the 12V battery can be used in DC-DC When not working, it provides uninterrupted power to the load. 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 DC-DC converted from high voltage to 12V, and the 12V battery will not provide energy for the load. The 12V battery is used as a backup, and it will supplement energy to the load when the high-voltage to 12V DC converter does not work or the transient response cannot meet the requirements, so as to ensure the stable and reliable operation of the low-voltage 12V power supply system.

In the above power supply system, the high-voltage to low-voltage circuit may not be able to supply power to the load when it fails, 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.

technical problem

The main purpose of this application is to propose a power supply device, aiming at improving the stability of power supply.

technical solution

In order to achieve the above purpose, the power supply device proposed by this application includes a power supply group composed of two power supply units connected in series, a power processing circuit and a voltage converter; the voltage converter includes a first input line and a second input line, so The positive input terminal of the voltage converter is connected to the positive pole of the power supply group through the first input line, and the negative input terminal of the voltage converter is connected to the negative pole of the power supply group through the second input line; The power processing circuit is connected between the power pack and the voltage converter, the power processing circuit includes: a first switching device, the output end of the first switching device is connected to the first input line; Two switching devices, the input end of the second switching device is connected to the second input line, the output end of the second switching device is connected to the input end of the first switching device; the connecting line and the inductor, the One end of the connection line is connected between the two power supply units, and the other end of the connection line is connected to the common point of the first switching device and the second switching device through the inductor; capacitor, the 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;

The power supply device further includes: a controller configured to control the turn-on or cut-off of the first switching device and the second switching device, so that the first switching device and the second switching device have a preset duty Working alternately; 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.

In one embodiment, both the first switching device and the second switching device are configured as semiconductor switching devices.

In an implementation manner, the first switching device and/or the second switching device are configured as MOS transistors or triodes.

In one embodiment, the power supply device includes 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.

In one embodiment, the power supply device further includes: a first fuse, disposed 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 set on the second input line and connect between one end of the second input line connected to the power supply group and the second switching device; the second fuse is set on the connecting line, and the The inductors are connected in series.

In one embodiment, the output ends of the two voltage converters are respectively configured to be connected to different loads and configured to supply power to different loads.

In one embodiment, the output terminals of the two voltage converters are connected in parallel and configured to supply power to the same load.

In one embodiment, 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, and the first anti-reverse diode The anode of the tube is connected to the positive output end of the first voltage converter; the second anti-reverse diode, the anode of the second anti-reverse diode is connected to the positive output end of the second voltage converter, The cathode of the second anti-reverse diode is commonly connected with the cathode of the first anti-reverse diode; the negative output terminal of the first voltage converter is commonly connected with the negative output terminal of the second voltage converter catch.

In one embodiment, the two voltage converters are respectively a first voltage converter and a second voltage converter, and the output terminals of the first voltage converter and the output terminals of the second voltage converter are set respectively Different power supply connections for loads with redundant power supply connections.

The present application also proposes a traveling device, including the above-mentioned power supply device.

Beneficial effect

In the technical solution of the present application, the power processing circuit is connected between the power pack and the voltage converter, and the first switching device and the second switching device can be set to access control signals such as duty ratio. When any one of the units fails to be disconnected, one of the first switching device and the second switching device can be set as a switch and the other is set as a conduction, at this time, the power processing circuit can form a boost with the remaining effective power supply units. The circuit (boost circuit) boosts the voltage of the remaining effective power supply units, compensates the output voltage loss of the power supply group after partial damage, keeps the power supply group at a stable output voltage, and can improve the stability of the power supply system; the power supply device can be removed The storage battery with larger volume and weight becomes more compact while ensuring reliability and improving stability.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative effort.

FIG. 1 is a schematic structural diagram of an embodiment of a power supply device of the present application.

FIG. 2 is a schematic structural diagram of another embodiment of the power supply device of the present application.

Fig. 3 is a schematic structural diagram of another embodiment of the power supply device of the present application.

FIG. 4 is a schematic structural diagram of another embodiment of a power supply device of the present application.

Explanation of reference numbers:

标号 label	名称 name	标号 label	名称 name
1 1	电源处理电路 power processing circuit	11 11	第一输入线 first input line
12 12	第二输入线 second input line	13 13	连接线 cable

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present application, the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be interpreted as indications or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel plans, taking "A and/or B" as an example, including plan A, or plan B, or A and B is a solution that is satisfied at the same time. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present application.

The application proposes a power supply device.

1 to 4, in an embodiment of the present application, 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 voltage of the power supply units BT1 and BT2 can be set to be higher than the target voltage (this In the embodiment, the target voltage is a high-voltage power battery of 12V); the power supply device also includes a voltage converter (DC-DC1, DC-DC2), and the voltage converter (DC-DC1, DC-DC2) includes a first input line 11 and a second Two input lines 12, the first input line 11 and the second input line 12 are respectively connected to the positive pole of the power pack and the negative pole of the power pack; the power supply device also includes a power processing circuit 1 (or 1a, 1b), the power processing circuit 1 ( or 1a, 1b) between the power pack and the voltage converter (DC-DC1, DC-DC2), i.e. between the power pack and the voltage converter (DC-DC1, DC-DC2) by:

The power processing circuit 1 (or 1a, 1b) includes a first switching device (Q1, Q3) and a second switching device (Q2, Q4), a first switching device (Q1, Q3) and a second switching device (Q2, Q4) Both are configured as semiconductor switching devices; specifically, the first switching devices (Q1, Q3) and the second switching devices (Q2, Q4) are both configured as MOS transistors and have better controllability. The first switching devices (Q1, Q3) and the second switching devices (Q2, Q4) are both configured as triodes. The output terminal of the first switching device (Q1, Q3) is connected to the first input line 11, the input terminal of the second switching device (Q2, Q4) is connected to the second input line 12, the second switching device (Q2, Q4) The output terminal is connected to the input terminal of the first switching device (Q1, Q3); the power supply device also includes a connection line 13 and an inductor (L1, L2), and one end of the connection line 13 is connected between the two power supply units BT1 and BT2, and connected to The other end of the line 13 is connected to the common contact point of the first switching device (Q1, Q3) and the second switching device (Q2, Q4) through the inductor (L1, L2); the power supply device also includes a capacitor (Vc1, Vc2), a capacitor ( One end of 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). In the embodiments shown in Figures 1 to 4, the components of the power processing circuit 1 (or 1a, 1b) in the power supply device are composed as follows:

The power processing circuit 1 (or 1a, 1b) in this embodiment can be set on a separate circuit board, and then connected to the power pack, the controller configured to provide control signals, and the load through the carrier form of the circuit board , that is, the power processing circuit and the power pack, controller, and load can be set as detachable connections.

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), the second switching device (Q2, Q4) When the control signal such as duty ratio is connected, 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) There is no noticeable effect on the input of the converters (DC-DC1, DC-DC2). When any one of the two series-connected power supply units BT1 and BT2 of the power group fails, such as when BT1 is disconnected, the first switching device Q1 (or Q3) and the second switching device Q2 (or Q4) , the second switching device Q2 (or Q4) is used as a switch and the first switching device Q1 (or Q3) is used for conduction, at this time the power processing circuit 1 (or 1a, 1b) can communicate with the remaining effective power supply unit BT2 Form a boost circuit (boost circuit) to boost the remaining effective power supply unit BT2, and the input voltage Vb2 provided by BT2 can be boosted to Vb1+Vb2 to compensate for the partial damage of the power supply group (if BT1 is disconnected, it is considered damaged) The loss of output voltage enables the power pack to maintain a relatively stable output voltage, enabling the power supply system to improve stability after removing the battery. When the power supply unit BT1 is disconnected, the power 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 Ensure the normal external power supply of LV1. 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.

When the power processing circuit in the power supply device of this embodiment is in use, it can also be used in the following manner: additionally set a power pack state detection device, such as detecting the voltage of the power supply unit BT1 and BT2, so it can be used in the power supply unit BT1 and BT2 When any one of BT2 is disconnected, it provides signals and controls the first switching device (Q1, Q3) and the second switching device (Q2, Q4) to start accessing control signals such as duty cycle, and the first switching device (Q1, Q3) , The second switching devices (Q2, Q4) start to work alternately at this time. If BT1 is turned off, the first switching device Q1 (or Q3) and the second switching device Q2 (or Q4), the second switching device Q2 (or Q4) acts as a switch while the first switching device Q1 (or Q3) For conduction, at this time the power processing circuit 1 (or 1a, 1b) can form a boost circuit (boost circuit) with the remaining effective power supply unit BT2 to boost the remaining effective power supply unit BT2, and the input provided by BT2 The voltage Vb2 can be boosted to Vb1+Vb2 to compensate for the output voltage loss of the power pack when it is partially damaged (if BT1 is disconnected, it is considered damaged), so that the power pack can maintain a relatively stable output voltage, and the power supply system can improve stability after removing the battery sex. When the power supply unit BT1 is disconnected, the power 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 Ensure the normal external power supply of LV1. 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.

The power supply device further includes a controller configured to control the first switching device (Q1, Q3) and the second switching device (Q2, Q4) to be turned on or off, that is, the controller is configured to control the first switching device ( Q1, Q3) is turned on or off, and the controller is configured to control the second switching device (Q2, Q4) to be turned on or off, so that the first switching device (Q1, Q3) and the second switching device (Q2, Q4) Work alternately according to the preset duty cycle; the first output terminal of the controller is connected to the controlled terminal of the first switching device (Q1, Q3), and the second output terminal of the controller is connected to the second switching device (Q2, Q4) the controlled end. The controller can improve the stability of the output voltage of the power supply device by controlling the working duty cycle of the first switching device (Q1, Q3) and the second switching device (Q2, Q4). In this embodiment, the voltage of the power supply unit BT1 is set equal to the voltage of the power supply unit BT2, and the duty cycle of the first switching device (Q1, Q3) and the second switching device (Q2, Q4) is set to 50%. It can be understood that the aforementioned voltage equality includes a certain deviation, such as a difference of 5% or 10%, and 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 not equal to the voltage of the power supply unit BT2, and at this time the working duty of the first switching device (Q1, Q3) and the second switching device (Q2, Q4) is The ratio is calculated based on the voltage of the power supply unit BT1 (or power supply unit BT2) and the total voltage of the power pack (the voltage of the power supply unit BT1 plus the voltage of the power supply unit BT2), specifically referring to the input voltage, output voltage, and duty cycle of the boost circuit Just do the calculation.

As shown in Figure 2 to Figure 4, the power supply device includes two above-mentioned power processing circuits 1 (1a and 1b) and two voltage converters (DC-DC1 and DC-DC2), two voltage converters (DC-DC1, DC-DC2) are respectively the first voltage converter DC-DC1 and the second voltage converter DC-DC2, two power processing circuits 1 (1a and 1b) and two voltage converters (DC-DC1 and DC-DC2) One-to-one connection, that is, the power processing circuit 1a is connected to the first voltage converter DC-DC1, and the power processing circuit 1b is connected to the second voltage converter DC-DC2. Two power processing circuits 1 (1a and 1b) are connected to two voltage converters (DC-DC1 and DC-DC2) in one-to-one correspondence, so that when one of the power processing circuits 1 (1a or 1b) fails, the other power processing circuit Circuit 1 (1b or 1a) can continue to provide a stable output voltage, further improving the stability of the power supply device.

The power supply device also includes a first fuse (F1, F2), the first fuse (F1, F2) is set on the first input line 11 and connected to one end of the first input line 11 connected to the power supply group (that is, the first input line in the figure 11) and the first switching device (Q1, Q3), or the first fuse (F1, F2) is set on the second input line 12 and connected to one end of the second input line 12 connected to the power group (that is, the between the left end of the second input line 12) and the second switching device (Q2, Q4); the power supply device also includes a second fuse (F3, F4), and the second fuse (F3, F4) is arranged on the connection line 13, Connect in series with inductors (L1, L2). Specifically, the setting forms of the first fuses (F1, F2) include setting on the first input line 11 at the same time, setting on the second input line 12 at the same time, and setting one on the first input line 11 while the other is set on the second input line. Two input lines 12 . In the embodiments shown in FIG. 2 to FIG. 4 , the first fuse F1 corresponding to the power processing circuit 1a is set on the first input line 11 , and the first fuse F2 corresponding to the power processing circuit 1b is set on the first input line 11 . In an alternative embodiment, it also includes that the first fuse F1 corresponding to the power processing circuit 1a is set on the first input line 11, and the first fuse F2 corresponding to the power processing circuit 1b is set on the second input line 12; The first fuse F1 corresponding to the circuit 1a is set on the second input line 12, the first fuse F2 corresponding to the power processing circuit 1b is set on the first input line 11; the first fuse F1 corresponding to the power processing circuit 1a is set on the second On the input line 12 , the first fuse F2 corresponding to the power processing circuit 1 b is set on the second input line 12 . When the power supply device in FIGS. 2 to 4 is in use, when the first switching device Q1 is short-circuited, one of the first fuse F1 and the second fuse F3 will be blown. When the second switching device Q2 fails due to a short circuit, the second fuse F3 will be blown. When the first switching device Q1 and the second switching device Q2 fail due to a short circuit at the same time, the first fuse F1 will be blown, that is, when the DC-DC1 input side is short-circuited and failed, the first fuse F1 will be blown. Therefore, if one of the connection circuit 1a and the converter DC-DC1 fails due to a short circuit, it will be disconnected from the power supply units BT1 and BT2, so as to ensure the normal power supply of the second voltage converter DC-DC2 and output the target voltage LV2 of 12V. When the first switching device Q3 is short-circuited, one of the first fuse F2 and the second fuse F4 will be blown. When the second switching device Q4 fails due to a short circuit, the second fuse F4 will be blown. When the first switching device Q3 and the second switching device Q4 fail due to a 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 due to a short circuit, the first fuse F2 will be blown. Therefore, if one of the power processing circuit 1b and the second voltage converter DC-DC2 fails due to a short circuit, it 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 a target voltage of 12V LV1. 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 switching device (Q1, Q3) is short-circuited, and the second switching device (Q2, Q4) is short-circuited , the first switching device (Q1, Q3) and the second switching device (Q2, Q4) are simultaneously short-circuited, the first fuse (F1, F2), the second fuse (F3, F4) and the power processing circuit 1 (1a, 1b) Working together, it is disconnected from the power supply group to ensure the normal power supply of the power supply device.

In this embodiment, a power supply device including two above-mentioned power processing circuits 1 (1a and 1b) and two voltage converters (DC-DC1 and DC-DC2) includes the following implementation methods when connecting a load: FIG. 2 shows the first In one manner, the output terminals of the first voltage converter DC-DC1 and the second voltage converter DC-DC2 are respectively configured to be connected to different loads to supply power to different loads, that is, the output terminals of the first voltage converter DC-DC1 The output voltage LV1 is configured to supply power to a load 1 , and the output voltage LV2 of the second voltage converter DC-DC2 is configured to supply power to a load 2 . Fig. 3 shows the second way, the output terminals of the first voltage converter DC-DC1 and the second voltage converter DC-DC2 are connected in parallel and configured to supply power to the same load. Specifically, the power supply device also includes a first anti-reverse diode D1, and the anode of the first anti-reverse diode D1 is connected to the positive output terminal of the first voltage converter DC-DC1; the power supply device also includes a second anti-reverse diode D1. Diode D2, the anode of the second anti-reverse diode D2 is connected to the positive output end of the second voltage converter DC-DC2, and is configured to connect to the positive input end of the load; the cathode of the second anti-reverse diode D2 Commonly connected with the cathode of the first anti-reverse diode D1; the negative output terminal of the first voltage converter DC-DC1 is commonly connected with the negative output terminal of the second voltage converter DC-DC2, and is configured to connect to the negative input of the load end. Figure 4 shows the third method. At this time, the corresponding load has a redundant interface, that is, the "interface" and "redundant interface" shown in Figure 4. The output terminal of the first voltage converter DC-DC1 and the second The output terminals of the voltage converter DC-DC2 correspond to different power supply interfaces respectively, that is, the output terminal of the first voltage converter DC-DC1 is connected to the interface of the load, and the output terminal of the second voltage converter DC-DC2 is connected to the redundant interface of the load connect. The specific structure of the power processing circuit 1 (1a and 1b) refers to the above-mentioned embodiments. Since this power supply device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the functions brought by the technical solutions of the above-mentioned embodiments. This will not repeat them one by one.

The present application also proposes a traveling device, which includes the above-mentioned power supply device, the traveling device is an electric vehicle, and the power pack is a power battery. For the specific structure of the power supply device, refer to the above-mentioned embodiments. Since the traveling device adopts all the technical solutions of the above-mentioned embodiments, it at least has all the functions brought by the technical solutions of the above-mentioned embodiments, and will not repeat them here.

The above are only optional embodiments of the present application, and are not intended to limit the patent scope of the present application. Under the inventive concept of the present application, the equivalent structural transformations made by using the description of the application and the contents of the accompanying drawings, or direct/indirect Applications in other relevant technical fields are included in the patent protection scope of the present application.

Claims

A power supply device, including a power pack consisting of two power supply units connected in series, a power 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 pole of the power pack through the first input line, and the negative input end of the voltage converter connected to the negative pole of the power pack through the second input line;

The power processing circuit is connected between the power pack and the voltage converter, and the power processing circuit includes:

a first switching device, the output terminal 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 wire and an inductor, one end of the connecting wire is connected between the two power supply units, and the other end of the connecting wire is connected to the common of the first switching device and the second switching device through the inductor. contact;

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;

The power supply device also includes:

A controller, configured to control the turn-on or cut-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.
The power supply device according to claim 1, wherein both the first switching device and the second switching device are configured as semiconductor switching devices.
The power supply device according to claim 1, wherein the first switching device and/or the second switching device are configured as MOS transistors or triodes.
The power supply device according to claim 1, wherein the power supply device comprises two power processing circuits and two voltage converters, and the two power processing circuits and the two voltage converters are one by one corresponding connection.
The power supply device according to claim 4, wherein the power supply device further comprises:

The first fuse 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;

The second fuse is arranged on the connection line and connected in series with the inductor.
The power supply device according to claim 4, wherein the output terminals of the two voltage converters are respectively configured to be connected to different loads to supply power to different loads.
The power supply device according to claim 4, wherein the output ends of the two voltage converters are connected in parallel and configured to supply power to the same load.
The power supply device according to claim 7, wherein the two voltage converters are respectively a first voltage converter and a second voltage converter, and the power supply system further comprises:

A first anti-reverse diode, the anode of the first anti-reverse diode is connected to the positive output terminal of the first voltage converter;

The second anti-inversion diode, the anode of the second anti-inversion diode is connected to the positive output terminal of the second voltage converter, and the cathode of the second anti-inversion diode is connected to the first anti-inversion diode. The cathode of the anti-diode is commonly connected;

The negative output terminal of the first voltage converter is commonly connected with the negative output terminal of the second voltage converter.
The power supply device according to claim 4, wherein the two voltage converters are respectively a first voltage converter and a second voltage converter, and the output terminal of the first voltage converter is converted to the second voltage The output ends of the switches are respectively set to be connected to different power supply interfaces of the load with redundant power supply interfaces.
A traveling device, comprising the power supply device according to any one of claims 1-9.